nextcloud / server

apps/dav/lib/Connector/Sabre/ShareTypeList.php

Doc Comments +1 added lines, -1 removed lines

@@ -61,7 +61,7 @@
 	 * The deserialize method is called during xml parsing.
 	 *
 	 * @param Reader $reader
-	 * @return mixed
+	 * @return null|ShareTypeList
 	 */
 	static function xmlDeserialize(Reader $reader) {
 		$shareTypes = [];

Indentation +51 added lines, -51 removed lines

@@ -32,61 +32,61 @@
  * This property contains multiple "share-type" elements, each containing a share type.
  */
 class ShareTypeList implements Element {
-	const NS_OWNCLOUD = 'http://owncloud.org/ns';
+    const NS_OWNCLOUD = 'http://owncloud.org/ns';
 
-	/**
-	 * Share types
-	 *
-	 * @var int[]
-	 */
-	private $shareTypes;
+    /**
+     * Share types
+     *
+     * @var int[]
+     */
+    private $shareTypes;
 
-	/**
-	 * @param int[] $shareTypes
-	 */
-	public function __construct($shareTypes) {
-		$this->shareTypes = $shareTypes;
-	}
+    /**
+     * @param int[] $shareTypes
+     */
+    public function __construct($shareTypes) {
+        $this->shareTypes = $shareTypes;
+    }
 
-	/**
-	 * Returns the share types
-	 *
-	 * @return int[]
-	 */
-	public function getShareTypes() {
-		return $this->shareTypes;
-	}
+    /**
+     * Returns the share types
+     *
+     * @return int[]
+     */
+    public function getShareTypes() {
+        return $this->shareTypes;
+    }
 
-	/**
-	 * The deserialize method is called during xml parsing.
-	 *
-	 * @param Reader $reader
-	 * @return mixed
-	 */
-	static function xmlDeserialize(Reader $reader) {
-		$shareTypes = [];
+    /**
+     * The deserialize method is called during xml parsing.
+     *
+     * @param Reader $reader
+     * @return mixed
+     */
+    static function xmlDeserialize(Reader $reader) {
+        $shareTypes = [];
 
-		$tree = $reader->parseInnerTree();
-		if ($tree === null) {
-			return null;
-		}
-		foreach ($tree as $elem) {
-			if ($elem['name'] === '{' . self::NS_OWNCLOUD . '}share-type') {
-				$shareTypes[] = (int)$elem['value'];
-			}
-		}
-		return new self($shareTypes);
-	}
+        $tree = $reader->parseInnerTree();
+        if ($tree === null) {
+            return null;
+        }
+        foreach ($tree as $elem) {
+            if ($elem['name'] === '{' . self::NS_OWNCLOUD . '}share-type') {
+                $shareTypes[] = (int)$elem['value'];
+            }
+        }
+        return new self($shareTypes);
+    }
 
-	/**
-	 * The xmlSerialize metod is called during xml writing.
-	 *
-	 * @param Writer $writer
-	 * @return void
-	 */
-	function xmlSerialize(Writer $writer) {
-		foreach ($this->shareTypes as $shareType) {
-			$writer->writeElement('{' . self::NS_OWNCLOUD . '}share-type', $shareType);
-		}
-	}
+    /**
+     * The xmlSerialize metod is called during xml writing.
+     *
+     * @param Writer $writer
+     * @return void
+     */
+    function xmlSerialize(Writer $writer) {
+        foreach ($this->shareTypes as $shareType) {
+            $writer->writeElement('{' . self::NS_OWNCLOUD . '}share-type', $shareType);
+        }
+    }
 }

Spacing +3 added lines, -3 removed lines

@@ -71,8 +71,8 @@ 
 			return null;
 		}
 		foreach ($tree as $elem) {
-			if ($elem['name'] === '{' . self::NS_OWNCLOUD . '}share-type') {
-				$shareTypes[] = (int)$elem['value'];
+			if ($elem['name'] === '{'.self::NS_OWNCLOUD.'}share-type') {
+				$shareTypes[] = (int) $elem['value'];
 			}
 		}
 		return new self($shareTypes);
@@ -86,7 +86,7 @@ 
 	 */
 	function xmlSerialize(Writer $writer) {
 		foreach ($this->shareTypes as $shareType) {
-			$writer->writeElement('{' . self::NS_OWNCLOUD . '}share-type', $shareType);
+			$writer->writeElement('{'.self::NS_OWNCLOUD.'}share-type', $shareType);
 		}
 	}
 }

apps/dav/lib/Connector/Sabre/TagList.php

Doc Comments +1 added lines, -1 removed lines

@@ -80,7 +80,7 @@
 	 * the next element.
 	 *
 	 * @param Reader $reader
-	 * @return mixed
+	 * @return null|TagList
 	 */
 	static function xmlDeserialize(Reader $reader) {
 		$tags = [];

Indentation +79 added lines, -79 removed lines

@@ -34,92 +34,92 @@
  * This property contains multiple "tag" elements, each containing a tag name.
  */
 class TagList implements Element {
-	const NS_OWNCLOUD = 'http://owncloud.org/ns';
+    const NS_OWNCLOUD = 'http://owncloud.org/ns';
 
-	/**
-	 * tags
-	 *
-	 * @var array
-	 */
-	private $tags;
+    /**
+     * tags
+     *
+     * @var array
+     */
+    private $tags;
 
-	/**
-	 * @param array $tags
-	 */
-	public function __construct(array $tags) {
-		$this->tags = $tags;
-	}
+    /**
+     * @param array $tags
+     */
+    public function __construct(array $tags) {
+        $this->tags = $tags;
+    }
 
-	/**
-	 * Returns the tags
-	 *
-	 * @return array
-	 */
-	public function getTags() {
+    /**
+     * Returns the tags
+     *
+     * @return array
+     */
+    public function getTags() {
 
-		return $this->tags;
+        return $this->tags;
 
-	}
+    }
 
-	/**
-	 * The deserialize method is called during xml parsing.
-	 *
-	 * This method is called statictly, this is because in theory this method
-	 * may be used as a type of constructor, or factory method.
-	 *
-	 * Often you want to return an instance of the current class, but you are
-	 * free to return other data as well.
-	 *
-	 * You are responsible for advancing the reader to the next element. Not
-	 * doing anything will result in a never-ending loop.
-	 *
-	 * If you just want to skip parsing for this element altogether, you can
-	 * just call $reader->next();
-	 *
-	 * $reader->parseInnerTree() will parse the entire sub-tree, and advance to
-	 * the next element.
-	 *
-	 * @param Reader $reader
-	 * @return mixed
-	 */
-	static function xmlDeserialize(Reader $reader) {
-		$tags = [];
+    /**
+     * The deserialize method is called during xml parsing.
+     *
+     * This method is called statictly, this is because in theory this method
+     * may be used as a type of constructor, or factory method.
+     *
+     * Often you want to return an instance of the current class, but you are
+     * free to return other data as well.
+     *
+     * You are responsible for advancing the reader to the next element. Not
+     * doing anything will result in a never-ending loop.
+     *
+     * If you just want to skip parsing for this element altogether, you can
+     * just call $reader->next();
+     *
+     * $reader->parseInnerTree() will parse the entire sub-tree, and advance to
+     * the next element.
+     *
+     * @param Reader $reader
+     * @return mixed
+     */
+    static function xmlDeserialize(Reader $reader) {
+        $tags = [];
 
-		$tree = $reader->parseInnerTree();
-		if ($tree === null) {
-			return null;
-		}
-		foreach ($tree as $elem) {
-			if ($elem['name'] === '{' . self::NS_OWNCLOUD . '}tag') {
-				$tags[] = $elem['value'];
-			}
-		}
-		return new self($tags);
-	}
+        $tree = $reader->parseInnerTree();
+        if ($tree === null) {
+            return null;
+        }
+        foreach ($tree as $elem) {
+            if ($elem['name'] === '{' . self::NS_OWNCLOUD . '}tag') {
+                $tags[] = $elem['value'];
+            }
+        }
+        return new self($tags);
+    }
 
-	/**
-	 * The xmlSerialize metod is called during xml writing.
-	 *
-	 * Use the $writer argument to write its own xml serialization.
-	 *
-	 * An important note: do _not_ create a parent element. Any element
-	 * implementing XmlSerializble should only ever write what's considered
-	 * its 'inner xml'.
-	 *
-	 * The parent of the current element is responsible for writing a
-	 * containing element.
-	 *
-	 * This allows serializers to be re-used for different element names.
-	 *
-	 * If you are opening new elements, you must also close them again.
-	 *
-	 * @param Writer $writer
-	 * @return void
-	 */
-	function xmlSerialize(Writer $writer) {
+    /**
+     * The xmlSerialize metod is called during xml writing.
+     *
+     * Use the $writer argument to write its own xml serialization.
+     *
+     * An important note: do _not_ create a parent element. Any element
+     * implementing XmlSerializble should only ever write what's considered
+     * its 'inner xml'.
+     *
+     * The parent of the current element is responsible for writing a
+     * containing element.
+     *
+     * This allows serializers to be re-used for different element names.
+     *
+     * If you are opening new elements, you must also close them again.
+     *
+     * @param Writer $writer
+     * @return void
+     */
+    function xmlSerialize(Writer $writer) {
 
-		foreach ($this->tags as $tag) {
-			$writer->writeElement('{' . self::NS_OWNCLOUD . '}tag', $tag);
-		}
-	}
+        foreach ($this->tags as $tag) {
+            $writer->writeElement('{' . self::NS_OWNCLOUD . '}tag', $tag);
+        }
+    }
 }

Spacing +2 added lines, -2 removed lines

@@ -90,7 +90,7 @@ 
 			return null;
 		}
 		foreach ($tree as $elem) {
-			if ($elem['name'] === '{' . self::NS_OWNCLOUD . '}tag') {
+			if ($elem['name'] === '{'.self::NS_OWNCLOUD.'}tag') {
 				$tags[] = $elem['value'];
 			}
 		}
@@ -119,7 +119,7 @@ 
 	function xmlSerialize(Writer $writer) {
 
 		foreach ($this->tags as $tag) {
-			$writer->writeElement('{' . self::NS_OWNCLOUD . '}tag', $tag);
+			$writer->writeElement('{'.self::NS_OWNCLOUD.'}tag', $tag);
 		}
 	}
 }

lib/private/Share/MailNotifications.php

Unused Use Statements -1 removed lines

@@ -30,7 +30,6 @@
 
 namespace OC\Share;
 
-use DateTime;
 use OCP\IL10N;
 use OCP\IURLGenerator;
 use OCP\IUser;

Indentation +100 added lines, -100 removed lines

@@ -46,113 +46,113 @@
  */
 class MailNotifications {
 
-	/** @var IUser sender userId */
-	private $user;
-	/** @var string sender email address */
-	private $replyTo;
-	/** @var string */
-	private $senderDisplayName;
-	/** @var IL10N */
-	private $l;
-	/** @var IMailer */
-	private $mailer;
-	/** @var Defaults */
-	private $defaults;
-	/** @var ILogger */
-	private $logger;
-	/** @var IURLGenerator */
-	private $urlGenerator;
+    /** @var IUser sender userId */
+    private $user;
+    /** @var string sender email address */
+    private $replyTo;
+    /** @var string */
+    private $senderDisplayName;
+    /** @var IL10N */
+    private $l;
+    /** @var IMailer */
+    private $mailer;
+    /** @var Defaults */
+    private $defaults;
+    /** @var ILogger */
+    private $logger;
+    /** @var IURLGenerator */
+    private $urlGenerator;
 
-	/**
-	 * @param IUser $user
-	 * @param IL10N $l10n
-	 * @param IMailer $mailer
-	 * @param ILogger $logger
-	 * @param Defaults $defaults
-	 * @param IURLGenerator $urlGenerator
-	 */
-	public function __construct(IUser $user,
-								IL10N $l10n,
-								IMailer $mailer,
-								ILogger $logger,
-								Defaults $defaults,
-								IURLGenerator $urlGenerator) {
-		$this->l = $l10n;
-		$this->user = $user;
-		$this->mailer = $mailer;
-		$this->logger = $logger;
-		$this->defaults = $defaults;
-		$this->urlGenerator = $urlGenerator;
+    /**
+     * @param IUser $user
+     * @param IL10N $l10n
+     * @param IMailer $mailer
+     * @param ILogger $logger
+     * @param Defaults $defaults
+     * @param IURLGenerator $urlGenerator
+     */
+    public function __construct(IUser $user,
+                                IL10N $l10n,
+                                IMailer $mailer,
+                                ILogger $logger,
+                                Defaults $defaults,
+                                IURLGenerator $urlGenerator) {
+        $this->l = $l10n;
+        $this->user = $user;
+        $this->mailer = $mailer;
+        $this->logger = $logger;
+        $this->defaults = $defaults;
+        $this->urlGenerator = $urlGenerator;
 
-		$this->replyTo = $this->user->getEMailAddress();
-		$this->senderDisplayName = $this->user->getDisplayName();
-	}
+        $this->replyTo = $this->user->getEMailAddress();
+        $this->senderDisplayName = $this->user->getDisplayName();
+    }
 
-	/**
-	 * inform recipient about public link share
-	 *
-	 * @param string $recipient recipient email address
-	 * @param string $filename the shared file
-	 * @param string $link the public link
-	 * @param int $expiration expiration date (timestamp)
-	 * @return string[] $result of failed recipients
-	 */
-	public function sendLinkShareMail($recipient, $filename, $link, $expiration) {
-		$subject = (string)$this->l->t('%s shared »%s« with you', [$this->senderDisplayName, $filename]);
-		list($htmlBody, $textBody) = $this->createMailBody($filename, $link, $expiration);
+    /**
+     * inform recipient about public link share
+     *
+     * @param string $recipient recipient email address
+     * @param string $filename the shared file
+     * @param string $link the public link
+     * @param int $expiration expiration date (timestamp)
+     * @return string[] $result of failed recipients
+     */
+    public function sendLinkShareMail($recipient, $filename, $link, $expiration) {
+        $subject = (string)$this->l->t('%s shared »%s« with you', [$this->senderDisplayName, $filename]);
+        list($htmlBody, $textBody) = $this->createMailBody($filename, $link, $expiration);
 
-		$recipient = str_replace([', ', '; ', ',', ';', ' '], ',', $recipient);
-		$recipients = explode(',', $recipient);
-		try {
-			$message = $this->mailer->createMessage();
-			$message->setSubject($subject);
-			$message->setTo($recipients);
-			$message->setHtmlBody($htmlBody);
-			$message->setPlainBody($textBody);
-			$message->setFrom([
-				Util::getDefaultEmailAddress('sharing-noreply') =>
-					(string)$this->l->t('%s via %s', [
-						$this->senderDisplayName,
-						$this->defaults->getName()
-					]),
-			]);
-			if(!is_null($this->replyTo)) {
-				$message->setReplyTo([$this->replyTo]);
-			}
+        $recipient = str_replace([', ', '; ', ',', ';', ' '], ',', $recipient);
+        $recipients = explode(',', $recipient);
+        try {
+            $message = $this->mailer->createMessage();
+            $message->setSubject($subject);
+            $message->setTo($recipients);
+            $message->setHtmlBody($htmlBody);
+            $message->setPlainBody($textBody);
+            $message->setFrom([
+                Util::getDefaultEmailAddress('sharing-noreply') =>
+                    (string)$this->l->t('%s via %s', [
+                        $this->senderDisplayName,
+                        $this->defaults->getName()
+                    ]),
+            ]);
+            if(!is_null($this->replyTo)) {
+                $message->setReplyTo([$this->replyTo]);
+            }
 
-			return $this->mailer->send($message);
-		} catch (\Exception $e) {
-			$this->logger->error("Can't send mail with public link to $recipient: ".$e->getMessage(), ['app' => 'sharing']);
-			return [$recipient];
-		}
-	}
+            return $this->mailer->send($message);
+        } catch (\Exception $e) {
+            $this->logger->error("Can't send mail with public link to $recipient: ".$e->getMessage(), ['app' => 'sharing']);
+            return [$recipient];
+        }
+    }
 
-	/**
-	 * create mail body for plain text and html mail
-	 *
-	 * @param string $filename the shared file
-	 * @param string $link link to the shared file
-	 * @param int $expiration expiration date (timestamp)
-	 * @param string $prefix prefix of mail template files
-	 * @return array an array of the html mail body and the plain text mail body
-	 */
-	private function createMailBody($filename, $link, $expiration, $prefix = '') {
-		$formattedDate = $expiration ? $this->l->l('date', $expiration) : null;
+    /**
+     * create mail body for plain text and html mail
+     *
+     * @param string $filename the shared file
+     * @param string $link link to the shared file
+     * @param int $expiration expiration date (timestamp)
+     * @param string $prefix prefix of mail template files
+     * @return array an array of the html mail body and the plain text mail body
+     */
+    private function createMailBody($filename, $link, $expiration, $prefix = '') {
+        $formattedDate = $expiration ? $this->l->l('date', $expiration) : null;
 
-		$html = new \OC_Template('core', $prefix . 'mail', '');
-		$html->assign ('link', $link);
-		$html->assign ('user_displayname', $this->senderDisplayName);
-		$html->assign ('filename', $filename);
-		$html->assign('expiration',  $formattedDate);
-		$htmlMail = $html->fetchPage();
+        $html = new \OC_Template('core', $prefix . 'mail', '');
+        $html->assign ('link', $link);
+        $html->assign ('user_displayname', $this->senderDisplayName);
+        $html->assign ('filename', $filename);
+        $html->assign('expiration',  $formattedDate);
+        $htmlMail = $html->fetchPage();
 
-		$plainText = new \OC_Template('core', $prefix . 'altmail', '');
-		$plainText->assign ('link', $link);
-		$plainText->assign ('user_displayname', $this->senderDisplayName);
-		$plainText->assign ('filename', $filename);
-		$plainText->assign('expiration', $formattedDate);
-		$plainTextMail = $plainText->fetchPage();
+        $plainText = new \OC_Template('core', $prefix . 'altmail', '');
+        $plainText->assign ('link', $link);
+        $plainText->assign ('user_displayname', $this->senderDisplayName);
+        $plainText->assign ('filename', $filename);
+        $plainText->assign('expiration', $formattedDate);
+        $plainTextMail = $plainText->fetchPage();
 
-		return [$htmlMail, $plainTextMail];
-	}
+        return [$htmlMail, $plainTextMail];
+    }
 }

Spacing +12 added lines, -12 removed lines

@@ -98,7 +98,7 @@ 
 	 * @return string[] $result of failed recipients
 	 */
 	public function sendLinkShareMail($recipient, $filename, $link, $expiration) {
-		$subject = (string)$this->l->t('%s shared »%s« with you', [$this->senderDisplayName, $filename]);
+		$subject = (string) $this->l->t('%s shared »%s« with you', [$this->senderDisplayName, $filename]);
 		list($htmlBody, $textBody) = $this->createMailBody($filename, $link, $expiration);
 
 		$recipient = str_replace([', ', '; ', ',', ';', ' '], ',', $recipient);
@@ -111,12 +111,12 @@ 
 			$message->setPlainBody($textBody);
 			$message->setFrom([
 				Util::getDefaultEmailAddress('sharing-noreply') =>
-					(string)$this->l->t('%s via %s', [
+					(string) $this->l->t('%s via %s', [
 						$this->senderDisplayName,
 						$this->defaults->getName()
 					]),
 			]);
-			if(!is_null($this->replyTo)) {
+			if (!is_null($this->replyTo)) {
 				$message->setReplyTo([$this->replyTo]);
 			}
 
@@ -139,17 +139,17 @@ 
 	private function createMailBody($filename, $link, $expiration, $prefix = '') {
 		$formattedDate = $expiration ? $this->l->l('date', $expiration) : null;
 
-		$html = new \OC_Template('core', $prefix . 'mail', '');
-		$html->assign ('link', $link);
-		$html->assign ('user_displayname', $this->senderDisplayName);
-		$html->assign ('filename', $filename);
-		$html->assign('expiration',  $formattedDate);
+		$html = new \OC_Template('core', $prefix.'mail', '');
+		$html->assign('link', $link);
+		$html->assign('user_displayname', $this->senderDisplayName);
+		$html->assign('filename', $filename);
+		$html->assign('expiration', $formattedDate);
 		$htmlMail = $html->fetchPage();
 
-		$plainText = new \OC_Template('core', $prefix . 'altmail', '');
-		$plainText->assign ('link', $link);
-		$plainText->assign ('user_displayname', $this->senderDisplayName);
-		$plainText->assign ('filename', $filename);
+		$plainText = new \OC_Template('core', $prefix.'altmail', '');
+		$plainText->assign('link', $link);
+		$plainText->assign('user_displayname', $this->senderDisplayName);
+		$plainText->assign('filename', $filename);
 		$plainText->assign('expiration', $formattedDate);
 		$plainTextMail = $plainText->fetchPage();
 

lib/private/legacy/app.php

Unused Use Statements -1 removed lines

@@ -51,7 +51,6 @@
 use OC\App\InfoParser;
 use OC\App\Platform;
 use OC\Installer;
-use OC\OCSClient;
 use OC\Repair;
 use OCP\App\ManagerEvent;
 

Doc Comments +6 added lines, -1 removed lines

@@ -1063,7 +1063,7 @@ 
 	 * @param string $app
 	 * @param \OCP\IConfig $config
 	 * @param \OCP\IL10N $l
-	 * @return bool
+	 * @return string
 	 *
 	 * @throws Exception if app is not compatible with this version of ownCloud
 	 * @throws Exception if no app-name was specified
@@ -1243,6 +1243,11 @@ 
 		}
 	}
 
+	/**
+	 * @param string $lang
+	 *
+	 * @return string
+	 */
 	protected static function findBestL10NOption($options, $lang) {
 		$fallback = $similarLangFallback = $englishFallback = false;
 

Indentation +1334 added lines, -1334 removed lines

@@ -61,1338 +61,1338 @@
  * upgrading and removing apps.
  */
 class OC_App {
-	static private $appVersion = [];
-	static private $adminForms = array();
-	static private $personalForms = array();
-	static private $appInfo = array();
-	static private $appTypes = array();
-	static private $loadedApps = array();
-	static private $altLogin = array();
-	static private $alreadyRegistered = [];
-	const officialApp = 200;
-
-	/**
-	 * clean the appId
-	 *
-	 * @param string|boolean $app AppId that needs to be cleaned
-	 * @return string
-	 */
-	public static function cleanAppId($app) {
-		return str_replace(array('\0', '/', '\\', '..'), '', $app);
-	}
-
-	/**
-	 * Check if an app is loaded
-	 *
-	 * @param string $app
-	 * @return bool
-	 */
-	public static function isAppLoaded($app) {
-		return in_array($app, self::$loadedApps, true);
-	}
-
-	/**
-	 * loads all apps
-	 *
-	 * @param string[] | string | null $types
-	 * @return bool
-	 *
-	 * This function walks through the ownCloud directory and loads all apps
-	 * it can find. A directory contains an app if the file /appinfo/info.xml
-	 * exists.
-	 *
-	 * if $types is set, only apps of those types will be loaded
-	 */
-	public static function loadApps($types = null) {
-		if (\OC::$server->getSystemConfig()->getValue('maintenance', false)) {
-			return false;
-		}
-		// Load the enabled apps here
-		$apps = self::getEnabledApps();
-
-		// Add each apps' folder as allowed class path
-		foreach($apps as $app) {
-			$path = self::getAppPath($app);
-			if($path !== false) {
-				self::registerAutoloading($app, $path);
-			}
-		}
-
-		// prevent app.php from printing output
-		ob_start();
-		foreach ($apps as $app) {
-			if ((is_null($types) or self::isType($app, $types)) && !in_array($app, self::$loadedApps)) {
-				self::loadApp($app);
-			}
-		}
-		ob_end_clean();
-
-		return true;
-	}
-
-	/**
-	 * load a single app
-	 *
-	 * @param string $app
-	 */
-	public static function loadApp($app) {
-		self::$loadedApps[] = $app;
-		$appPath = self::getAppPath($app);
-		if($appPath === false) {
-			return;
-		}
-
-		// in case someone calls loadApp() directly
-		self::registerAutoloading($app, $appPath);
-
-		if (is_file($appPath . '/appinfo/app.php')) {
-			\OC::$server->getEventLogger()->start('load_app_' . $app, 'Load app: ' . $app);
-			self::requireAppFile($app);
-			if (self::isType($app, array('authentication'))) {
-				// since authentication apps affect the "is app enabled for group" check,
-				// the enabled apps cache needs to be cleared to make sure that the
-				// next time getEnableApps() is called it will also include apps that were
-				// enabled for groups
-				self::$enabledAppsCache = array();
-			}
-			\OC::$server->getEventLogger()->end('load_app_' . $app);
-		}
-
-		$info = self::getAppInfo($app);
-		if (!empty($info['activity']['filters'])) {
-			foreach ($info['activity']['filters'] as $filter) {
-				\OC::$server->getActivityManager()->registerFilter($filter);
-			}
-		}
-		if (!empty($info['activity']['settings'])) {
-			foreach ($info['activity']['settings'] as $setting) {
-				\OC::$server->getActivityManager()->registerSetting($setting);
-			}
-		}
-		if (!empty($info['activity']['providers'])) {
-			foreach ($info['activity']['providers'] as $provider) {
-				\OC::$server->getActivityManager()->registerProvider($provider);
-			}
-		}
-	}
-
-	/**
-	 * @internal
-	 * @param string $app
-	 * @param string $path
-	 */
-	public static function registerAutoloading($app, $path) {
-		$key = $app . '-' . $path;
-		if(isset(self::$alreadyRegistered[$key])) {
-			return;
-		}
-		self::$alreadyRegistered[$key] = true;
-		// Register on PSR-4 composer autoloader
-		$appNamespace = \OC\AppFramework\App::buildAppNamespace($app);
-		\OC::$server->registerNamespace($app, $appNamespace);
-		\OC::$composerAutoloader->addPsr4($appNamespace . '\\', $path . '/lib/', true);
-		if (defined('PHPUNIT_RUN') || defined('CLI_TEST_RUN')) {
-			\OC::$composerAutoloader->addPsr4($appNamespace . '\\Tests\\', $path . '/tests/', true);
-		}
-
-		// Register on legacy autoloader
-		\OC::$loader->addValidRoot($path);
-	}
-
-	/**
-	 * Load app.php from the given app
-	 *
-	 * @param string $app app name
-	 */
-	private static function requireAppFile($app) {
-		try {
-			// encapsulated here to avoid variable scope conflicts
-			require_once $app . '/appinfo/app.php';
-		} catch (Error $ex) {
-			\OC::$server->getLogger()->logException($ex);
-			$blacklist = \OC::$server->getAppManager()->getAlwaysEnabledApps();
-			if (!in_array($app, $blacklist)) {
-				self::disable($app);
-			}
-		}
-	}
-
-	/**
-	 * check if an app is of a specific type
-	 *
-	 * @param string $app
-	 * @param string|array $types
-	 * @return bool
-	 */
-	public static function isType($app, $types) {
-		if (is_string($types)) {
-			$types = array($types);
-		}
-		$appTypes = self::getAppTypes($app);
-		foreach ($types as $type) {
-			if (array_search($type, $appTypes) !== false) {
-				return true;
-			}
-		}
-		return false;
-	}
-
-	/**
-	 * get the types of an app
-	 *
-	 * @param string $app
-	 * @return array
-	 */
-	private static function getAppTypes($app) {
-		//load the cache
-		if (count(self::$appTypes) == 0) {
-			self::$appTypes = \OC::$server->getAppConfig()->getValues(false, 'types');
-		}
-
-		if (isset(self::$appTypes[$app])) {
-			return explode(',', self::$appTypes[$app]);
-		} else {
-			return array();
-		}
-	}
-
-	/**
-	 * read app types from info.xml and cache them in the database
-	 */
-	public static function setAppTypes($app) {
-		$appData = self::getAppInfo($app);
-		if(!is_array($appData)) {
-			return;
-		}
-
-		if (isset($appData['types'])) {
-			$appTypes = implode(',', $appData['types']);
-		} else {
-			$appTypes = '';
-			$appData['types'] = [];
-		}
-
-		\OC::$server->getAppConfig()->setValue($app, 'types', $appTypes);
-
-		if (\OC::$server->getAppManager()->hasProtectedAppType($appData['types'])) {
-			$enabled = \OC::$server->getAppConfig()->getValue($app, 'enabled', 'yes');
-			if ($enabled !== 'yes' && $enabled !== 'no') {
-				\OC::$server->getAppConfig()->setValue($app, 'enabled', 'yes');
-			}
-		}
-	}
-
-	/**
-	 * check if app is shipped
-	 *
-	 * @param string $appId the id of the app to check
-	 * @return bool
-	 *
-	 * Check if an app that is installed is a shipped app or installed from the appstore.
-	 */
-	public static function isShipped($appId) {
-		return \OC::$server->getAppManager()->isShipped($appId);
-	}
-
-	/**
-	 * get all enabled apps
-	 */
-	protected static $enabledAppsCache = array();
-
-	/**
-	 * Returns apps enabled for the current user.
-	 *
-	 * @param bool $forceRefresh whether to refresh the cache
-	 * @param bool $all whether to return apps for all users, not only the
-	 * currently logged in one
-	 * @return string[]
-	 */
-	public static function getEnabledApps($forceRefresh = false, $all = false) {
-		if (!\OC::$server->getSystemConfig()->getValue('installed', false)) {
-			return array();
-		}
-		// in incognito mode or when logged out, $user will be false,
-		// which is also the case during an upgrade
-		$appManager = \OC::$server->getAppManager();
-		if ($all) {
-			$user = null;
-		} else {
-			$user = \OC::$server->getUserSession()->getUser();
-		}
-
-		if (is_null($user)) {
-			$apps = $appManager->getInstalledApps();
-		} else {
-			$apps = $appManager->getEnabledAppsForUser($user);
-		}
-		$apps = array_filter($apps, function ($app) {
-			return $app !== 'files';//we add this manually
-		});
-		sort($apps);
-		array_unshift($apps, 'files');
-		return $apps;
-	}
-
-	/**
-	 * checks whether or not an app is enabled
-	 *
-	 * @param string $app app
-	 * @return bool
-	 *
-	 * This function checks whether or not an app is enabled.
-	 */
-	public static function isEnabled($app) {
-		return \OC::$server->getAppManager()->isEnabledForUser($app);
-	}
-
-	/**
-	 * enables an app
-	 *
-	 * @param string $appId
-	 * @param array $groups (optional) when set, only these groups will have access to the app
-	 * @throws \Exception
-	 * @return void
-	 *
-	 * This function set an app as enabled in appconfig.
-	 */
-	public function enable($appId,
-						   $groups = null) {
-		self::$enabledAppsCache = []; // flush
-		$l = \OC::$server->getL10N('core');
-		$config = \OC::$server->getConfig();
-
-		// Check if app is already downloaded
-		$installer = new Installer(
-			\OC::$server->getAppFetcher(),
-			\OC::$server->getHTTPClientService(),
-			\OC::$server->getTempManager(),
-			\OC::$server->getLogger()
-		);
-		$isDownloaded = $installer->isDownloaded($appId);
-
-		if(!$isDownloaded) {
-			$installer->downloadApp($appId);
-		}
-
-		if (!Installer::isInstalled($appId)) {
-			$appId = self::installApp(
-				$appId,
-				$config,
-				$l
-			);
-			$appPath = self::getAppPath($appId);
-			self::registerAutoloading($appId, $appPath);
-			$installer->installApp($appId);
-		} else {
-			// check for required dependencies
-			$info = self::getAppInfo($appId);
-			self::checkAppDependencies($config, $l, $info);
-			$appPath = self::getAppPath($appId);
-			self::registerAutoloading($appId, $appPath);
-			$installer->installApp($appId);
-		}
-
-		$appManager = \OC::$server->getAppManager();
-		if (!is_null($groups)) {
-			$groupManager = \OC::$server->getGroupManager();
-			$groupsList = [];
-			foreach ($groups as $group) {
-				$groupItem = $groupManager->get($group);
-				if ($groupItem instanceof \OCP\IGroup) {
-					$groupsList[] = $groupManager->get($group);
-				}
-			}
-			$appManager->enableAppForGroups($appId, $groupsList);
-		} else {
-			$appManager->enableApp($appId);
-		}
-
-		$info = self::getAppInfo($appId);
-		if(isset($info['settings']) && is_array($info['settings'])) {
-			$appPath = self::getAppPath($appId);
-			self::registerAutoloading($appId, $appPath);
-			\OC::$server->getSettingsManager()->setupSettings($info['settings']);
-		}
-	}
-
-	/**
-	 * @param string $app
-	 * @return bool
-	 */
-	public static function removeApp($app) {
-		if (self::isShipped($app)) {
-			return false;
-		}
-
-		$installer = new Installer(
-			\OC::$server->getAppFetcher(),
-			\OC::$server->getHTTPClientService(),
-			\OC::$server->getTempManager(),
-			\OC::$server->getLogger()
-		);
-		return $installer->removeApp($app);
-	}
-
-	/**
-	 * This function set an app as disabled in appconfig.
-	 *
-	 * @param string $app app
-	 * @throws Exception
-	 */
-	public static function disable($app) {
-		// flush
-		self::$enabledAppsCache = array();
-
-		// run uninstall steps
-		$appData = OC_App::getAppInfo($app);
-		if (!is_null($appData)) {
-			OC_App::executeRepairSteps($app, $appData['repair-steps']['uninstall']);
-		}
-
-		// emit disable hook - needed anymore ?
-		\OC_Hook::emit('OC_App', 'pre_disable', array('app' => $app));
-
-		// finally disable it
-		$appManager = \OC::$server->getAppManager();
-		$appManager->disableApp($app);
-	}
-
-	/**
-	 * Returns the Settings Navigation
-	 *
-	 * @return string[]
-	 *
-	 * This function returns an array containing all settings pages added. The
-	 * entries are sorted by the key 'order' ascending.
-	 */
-	public static function getSettingsNavigation() {
-		$l = \OC::$server->getL10N('lib');
-		$urlGenerator = \OC::$server->getURLGenerator();
-
-		$settings = array();
-		// by default, settings only contain the help menu
-		if (\OC::$server->getSystemConfig()->getValue('knowledgebaseenabled', true)) {
-			$settings = array(
-				array(
-					"id" => "help",
-					"order" => 4,
-					"href" => $urlGenerator->linkToRoute('settings_help'),
-					"name" => $l->t("Help"),
-					"icon" => $urlGenerator->imagePath("settings", "help.svg")
-				)
-			);
-		}
-
-		// if the user is logged-in
-		if (\OC::$server->getUserSession()->isLoggedIn()) {
-			// personal menu
-			$settings[] = array(
-				"id" => "personal",
-				"order" => 1,
-				"href" => $urlGenerator->linkToRoute('settings_personal'),
-				"name" => $l->t("Personal"),
-				"icon" => $urlGenerator->imagePath("settings", "personal.svg")
-			);
-
-			//SubAdmins are also allowed to access user management
-			$userObject = \OC::$server->getUserSession()->getUser();
-			$isSubAdmin = false;
-			if($userObject !== null) {
-				$isSubAdmin = \OC::$server->getGroupManager()->getSubAdmin()->isSubAdmin($userObject);
-			}
-			if ($isSubAdmin) {
-				// admin users menu
-				$settings[] = array(
-					"id" => "core_users",
-					"order" => 3,
-					"href" => $urlGenerator->linkToRoute('settings_users'),
-					"name" => $l->t("Users"),
-					"icon" => $urlGenerator->imagePath("settings", "users.svg")
-				);
-			}
-
-			// if the user is an admin
-			if (OC_User::isAdminUser(OC_User::getUser())) {
-				// admin settings
-				$settings[] = array(
-					"id" => "admin",
-					"order" => 2,
-					"href" => $urlGenerator->linkToRoute('settings.AdminSettings.index'),
-					"name" => $l->t("Admin"),
-					"icon" => $urlGenerator->imagePath("settings", "admin.svg")
-				);
-			}
-		}
-
-		$navigation = self::proceedNavigation($settings);
-		return $navigation;
-	}
-
-	// This is private as well. It simply works, so don't ask for more details
-	private static function proceedNavigation($list) {
-		$headerIconCount = 8;
-		if(OC_User::isAdminUser(OC_User::getUser())) {
-			$headerIconCount--;
-		}
-		usort($list, function($a, $b) {
-			if (isset($a['order']) && isset($b['order'])) {
-				return ($a['order'] < $b['order']) ? -1 : 1;
-			} else if (isset($a['order']) || isset($b['order'])) {
-				return isset($a['order']) ? -1 : 1;
-			} else {
-				return ($a['name'] < $b['name']) ? -1 : 1;
-			}
-		});
-
-		$activeAppIndex = -1;
-		$activeApp = OC::$server->getNavigationManager()->getActiveEntry();
-		foreach ($list as $index => &$navEntry) {
-			if ($navEntry['id'] == $activeApp) {
-				$navEntry['active'] = true;
-				$activeAppIndex = $index;
-			} else {
-				$navEntry['active'] = false;
-			}
-		}
-		unset($navEntry);
-
-		if($activeAppIndex > ($headerIconCount-1)) {
-			$active = $list[$activeAppIndex];
-			$lastInHeader = $list[$headerIconCount-1];
-			$list[$headerIconCount-1] = $active;
-			$list[$activeAppIndex] = $lastInHeader;
-		}
-
-		foreach ($list as $index => &$navEntry) {
-			$navEntry['showInHeader'] = false;
-			if($index < $headerIconCount) {
-				$navEntry['showInHeader'] = true;
-			}
-		}
-
-
-
-		return $list;
-	}
-
-	public static function proceedAppNavigation($entries) {
-		$headerIconCount = 8;
-		if(OC_User::isAdminUser(OC_User::getUser())) {
-			$headerIconCount--;
-		}
-		$activeAppIndex = -1;
-		$list = self::proceedNavigation($entries);
-
-		$activeApp = OC::$server->getNavigationManager()->getActiveEntry();
-		foreach ($list as $index => &$navEntry) {
-			if ($navEntry['id'] == $activeApp) {
-				$navEntry['active'] = true;
-				$activeAppIndex = $index;
-			} else {
-				$navEntry['active'] = false;
-			}
-		}
-		// move active item to last position
-		if($activeAppIndex > ($headerIconCount-1)) {
-			$active = $list[$activeAppIndex];
-			$lastInHeader = $list[$headerIconCount-1];
-			$list[$headerIconCount-1] = $active;
-			$list[$activeAppIndex] = $lastInHeader;
-		}
-		$list = array_slice($list, 0, $headerIconCount);
-
-		return $list;
-	}
-
-	/**
-	 * Get the path where to install apps
-	 *
-	 * @return string|false
-	 */
-	public static function getInstallPath() {
-		if (\OC::$server->getSystemConfig()->getValue('appstoreenabled', true) == false) {
-			return false;
-		}
-
-		foreach (OC::$APPSROOTS as $dir) {
-			if (isset($dir['writable']) && $dir['writable'] === true) {
-				return $dir['path'];
-			}
-		}
-
-		\OCP\Util::writeLog('core', 'No application directories are marked as writable.', \OCP\Util::ERROR);
-		return null;
-	}
-
-
-	/**
-	 * search for an app in all app-directories
-	 *
-	 * @param string $appId
-	 * @return false|string
-	 */
-	public static function findAppInDirectories($appId) {
-		$sanitizedAppId = self::cleanAppId($appId);
-		if($sanitizedAppId !== $appId) {
-			return false;
-		}
-		static $app_dir = array();
-
-		if (isset($app_dir[$appId])) {
-			return $app_dir[$appId];
-		}
-
-		$possibleApps = array();
-		foreach (OC::$APPSROOTS as $dir) {
-			if (file_exists($dir['path'] . '/' . $appId)) {
-				$possibleApps[] = $dir;
-			}
-		}
-
-		if (empty($possibleApps)) {
-			return false;
-		} elseif (count($possibleApps) === 1) {
-			$dir = array_shift($possibleApps);
-			$app_dir[$appId] = $dir;
-			return $dir;
-		} else {
-			$versionToLoad = array();
-			foreach ($possibleApps as $possibleApp) {
-				$version = self::getAppVersionByPath($possibleApp['path']);
-				if (empty($versionToLoad) || version_compare($version, $versionToLoad['version'], '>')) {
-					$versionToLoad = array(
-						'dir' => $possibleApp,
-						'version' => $version,
-					);
-				}
-			}
-			$app_dir[$appId] = $versionToLoad['dir'];
-			return $versionToLoad['dir'];
-			//TODO - write test
-		}
-	}
-
-	/**
-	 * Get the directory for the given app.
-	 * If the app is defined in multiple directories, the first one is taken. (false if not found)
-	 *
-	 * @param string $appId
-	 * @return string|false
-	 */
-	public static function getAppPath($appId) {
-		if ($appId === null || trim($appId) === '') {
-			return false;
-		}
-
-		if (($dir = self::findAppInDirectories($appId)) != false) {
-			return $dir['path'] . '/' . $appId;
-		}
-		return false;
-	}
-
-	/**
-	 * Get the path for the given app on the access
-	 * If the app is defined in multiple directories, the first one is taken. (false if not found)
-	 *
-	 * @param string $appId
-	 * @return string|false
-	 */
-	public static function getAppWebPath($appId) {
-		if (($dir = self::findAppInDirectories($appId)) != false) {
-			return OC::$WEBROOT . $dir['url'] . '/' . $appId;
-		}
-		return false;
-	}
-
-	/**
-	 * get the last version of the app from appinfo/info.xml
-	 *
-	 * @param string $appId
-	 * @param bool $useCache
-	 * @return string
-	 */
-	public static function getAppVersion($appId, $useCache = true) {
-		if($useCache && isset(self::$appVersion[$appId])) {
-			return self::$appVersion[$appId];
-		}
-
-		$file = self::getAppPath($appId);
-		self::$appVersion[$appId] = ($file !== false) ? self::getAppVersionByPath($file) : '0';
-		return self::$appVersion[$appId];
-	}
-
-	/**
-	 * get app's version based on it's path
-	 *
-	 * @param string $path
-	 * @return string
-	 */
-	public static function getAppVersionByPath($path) {
-		$infoFile = $path . '/appinfo/info.xml';
-		$appData = self::getAppInfo($infoFile, true);
-		return isset($appData['version']) ? $appData['version'] : '';
-	}
-
-
-	/**
-	 * Read all app metadata from the info.xml file
-	 *
-	 * @param string $appId id of the app or the path of the info.xml file
-	 * @param bool $path
-	 * @param string $lang
-	 * @return array|null
-	 * @note all data is read from info.xml, not just pre-defined fields
-	 */
-	public static function getAppInfo($appId, $path = false, $lang = null) {
-		if ($path) {
-			$file = $appId;
-		} else {
-			if ($lang === null && isset(self::$appInfo[$appId])) {
-				return self::$appInfo[$appId];
-			}
-			$appPath = self::getAppPath($appId);
-			if($appPath === false) {
-				return null;
-			}
-			$file = $appPath . '/appinfo/info.xml';
-		}
-
-		$parser = new InfoParser(\OC::$server->getMemCacheFactory()->create('core.appinfo'));
-		$data = $parser->parse($file);
-
-		if (is_array($data)) {
-			$data = OC_App::parseAppInfo($data, $lang);
-		}
-		if(isset($data['ocsid'])) {
-			$storedId = \OC::$server->getConfig()->getAppValue($appId, 'ocsid');
-			if($storedId !== '' && $storedId !== $data['ocsid']) {
-				$data['ocsid'] = $storedId;
-			}
-		}
-
-		if ($lang === null) {
-			self::$appInfo[$appId] = $data;
-		}
-
-		return $data;
-	}
-
-	/**
-	 * Returns the navigation
-	 *
-	 * @return array
-	 *
-	 * This function returns an array containing all entries added. The
-	 * entries are sorted by the key 'order' ascending. Additional to the keys
-	 * given for each app the following keys exist:
-	 *   - active: boolean, signals if the user is on this navigation entry
-	 */
-	public static function getNavigation() {
-		$entries = OC::$server->getNavigationManager()->getAll();
-		$navigation = self::proceedNavigation($entries);
-		return $navigation;
-	}
-
-	/**
-	 * Returns the navigation inside the header bar
-	 *
-	 * @return array
-	 *
-	 * This function returns an array containing all entries added. The
-	 * entries are sorted by the key 'order' ascending. Additional to the keys
-	 * given for each app the following keys exist:
-	 *   - active: boolean, signals if the user is on this navigation entry
-	 */
-	public static function getHeaderNavigation() {
-		$entries = OC::$server->getNavigationManager()->getAll();
-		$navigation = self::proceedAppNavigation($entries);
-		return $navigation;
-	}
-
-	/**
-	 * get the id of loaded app
-	 *
-	 * @return string
-	 */
-	public static function getCurrentApp() {
-		$request = \OC::$server->getRequest();
-		$script = substr($request->getScriptName(), strlen(OC::$WEBROOT) + 1);
-		$topFolder = substr($script, 0, strpos($script, '/'));
-		if (empty($topFolder)) {
-			$path_info = $request->getPathInfo();
-			if ($path_info) {
-				$topFolder = substr($path_info, 1, strpos($path_info, '/', 1) - 1);
-			}
-		}
-		if ($topFolder == 'apps') {
-			$length = strlen($topFolder);
-			return substr($script, $length + 1, strpos($script, '/', $length + 1) - $length - 1);
-		} else {
-			return $topFolder;
-		}
-	}
-
-	/**
-	 * @param string $type
-	 * @return array
-	 */
-	public static function getForms($type) {
-		$forms = array();
-		switch ($type) {
-			case 'admin':
-				$source = self::$adminForms;
-				break;
-			case 'personal':
-				$source = self::$personalForms;
-				break;
-			default:
-				return array();
-		}
-		foreach ($source as $form) {
-			$forms[] = include $form;
-		}
-		return $forms;
-	}
-
-	/**
-	 * register an admin form to be shown
-	 *
-	 * @param string $app
-	 * @param string $page
-	 */
-	public static function registerAdmin($app, $page) {
-		self::$adminForms[] = $app . '/' . $page . '.php';
-	}
-
-	/**
-	 * register a personal form to be shown
-	 * @param string $app
-	 * @param string $page
-	 */
-	public static function registerPersonal($app, $page) {
-		self::$personalForms[] = $app . '/' . $page . '.php';
-	}
-
-	/**
-	 * @param array $entry
-	 */
-	public static function registerLogIn(array $entry) {
-		self::$altLogin[] = $entry;
-	}
-
-	/**
-	 * @return array
-	 */
-	public static function getAlternativeLogIns() {
-		return self::$altLogin;
-	}
-
-	/**
-	 * get a list of all apps in the apps folder
-	 *
-	 * @return array an array of app names (string IDs)
-	 * @todo: change the name of this method to getInstalledApps, which is more accurate
-	 */
-	public static function getAllApps() {
-
-		$apps = array();
-
-		foreach (OC::$APPSROOTS as $apps_dir) {
-			if (!is_readable($apps_dir['path'])) {
-				\OCP\Util::writeLog('core', 'unable to read app folder : ' . $apps_dir['path'], \OCP\Util::WARN);
-				continue;
-			}
-			$dh = opendir($apps_dir['path']);
-
-			if (is_resource($dh)) {
-				while (($file = readdir($dh)) !== false) {
-
-					if ($file[0] != '.' and is_dir($apps_dir['path'] . '/' . $file) and is_file($apps_dir['path'] . '/' . $file . '/appinfo/info.xml')) {
-
-						$apps[] = $file;
-					}
-				}
-			}
-		}
-
-		return $apps;
-	}
-
-	/**
-	 * List all apps, this is used in apps.php
-	 *
-	 * @return array
-	 */
-	public function listAllApps() {
-		$installedApps = OC_App::getAllApps();
-
-		//we don't want to show configuration for these
-		$blacklist = \OC::$server->getAppManager()->getAlwaysEnabledApps();
-		$appList = array();
-		$langCode = \OC::$server->getL10N('core')->getLanguageCode();
-		$urlGenerator = \OC::$server->getURLGenerator();
-
-		foreach ($installedApps as $app) {
-			if (array_search($app, $blacklist) === false) {
-
-				$info = OC_App::getAppInfo($app, false, $langCode);
-				if (!is_array($info)) {
-					\OCP\Util::writeLog('core', 'Could not read app info file for app "' . $app . '"', \OCP\Util::ERROR);
-					continue;
-				}
-
-				if (!isset($info['name'])) {
-					\OCP\Util::writeLog('core', 'App id "' . $app . '" has no name in appinfo', \OCP\Util::ERROR);
-					continue;
-				}
-
-				$enabled = \OC::$server->getAppConfig()->getValue($app, 'enabled', 'no');
-				$info['groups'] = null;
-				if ($enabled === 'yes') {
-					$active = true;
-				} else if ($enabled === 'no') {
-					$active = false;
-				} else {
-					$active = true;
-					$info['groups'] = $enabled;
-				}
-
-				$info['active'] = $active;
-
-				if (self::isShipped($app)) {
-					$info['internal'] = true;
-					$info['level'] = self::officialApp;
-					$info['removable'] = false;
-				} else {
-					$info['internal'] = false;
-					$info['removable'] = true;
-				}
-
-				$appPath = self::getAppPath($app);
-				if($appPath !== false) {
-					$appIcon = $appPath . '/img/' . $app . '.svg';
-					if (file_exists($appIcon)) {
-						$info['preview'] = \OC::$server->getURLGenerator()->imagePath($app, $app . '.svg');
-						$info['previewAsIcon'] = true;
-					} else {
-						$appIcon = $appPath . '/img/app.svg';
-						if (file_exists($appIcon)) {
-							$info['preview'] = \OC::$server->getURLGenerator()->imagePath($app, 'app.svg');
-							$info['previewAsIcon'] = true;
-						}
-					}
-				}
-				// fix documentation
-				if (isset($info['documentation']) && is_array($info['documentation'])) {
-					foreach ($info['documentation'] as $key => $url) {
-						// If it is not an absolute URL we assume it is a key
-						// i.e. admin-ldap will get converted to go.php?to=admin-ldap
-						if (stripos($url, 'https://') !== 0 && stripos($url, 'http://') !== 0) {
-							$url = $urlGenerator->linkToDocs($url);
-						}
-
-						$info['documentation'][$key] = $url;
-					}
-				}
-
-				$info['version'] = OC_App::getAppVersion($app);
-				$appList[] = $info;
-			}
-		}
-
-		return $appList;
-	}
-
-	/**
-	 * Returns the internal app ID or false
-	 * @param string $ocsID
-	 * @return string|false
-	 */
-	public static function getInternalAppIdByOcs($ocsID) {
-		if(is_numeric($ocsID)) {
-			$idArray = \OC::$server->getAppConfig()->getValues(false, 'ocsid');
-			if(array_search($ocsID, $idArray)) {
-				return array_search($ocsID, $idArray);
-			}
-		}
-		return false;
-	}
-
-	public static function shouldUpgrade($app) {
-		$versions = self::getAppVersions();
-		$currentVersion = OC_App::getAppVersion($app);
-		if ($currentVersion && isset($versions[$app])) {
-			$installedVersion = $versions[$app];
-			if (!version_compare($currentVersion, $installedVersion, '=')) {
-				return true;
-			}
-		}
-		return false;
-	}
-
-	/**
-	 * Adjust the number of version parts of $version1 to match
-	 * the number of version parts of $version2.
-	 *
-	 * @param string $version1 version to adjust
-	 * @param string $version2 version to take the number of parts from
-	 * @return string shortened $version1
-	 */
-	private static function adjustVersionParts($version1, $version2) {
-		$version1 = explode('.', $version1);
-		$version2 = explode('.', $version2);
-		// reduce $version1 to match the number of parts in $version2
-		while (count($version1) > count($version2)) {
-			array_pop($version1);
-		}
-		// if $version1 does not have enough parts, add some
-		while (count($version1) < count($version2)) {
-			$version1[] = '0';
-		}
-		return implode('.', $version1);
-	}
-
-	/**
-	 * Check whether the current ownCloud version matches the given
-	 * application's version requirements.
-	 *
-	 * The comparison is made based on the number of parts that the
-	 * app info version has. For example for ownCloud 6.0.3 if the
-	 * app info version is expecting version 6.0, the comparison is
-	 * made on the first two parts of the ownCloud version.
-	 * This means that it's possible to specify "requiremin" => 6
-	 * and "requiremax" => 6 and it will still match ownCloud 6.0.3.
-	 *
-	 * @param string $ocVersion ownCloud version to check against
-	 * @param array $appInfo app info (from xml)
-	 *
-	 * @return boolean true if compatible, otherwise false
-	 */
-	public static function isAppCompatible($ocVersion, $appInfo) {
-		$requireMin = '';
-		$requireMax = '';
-		if (isset($appInfo['dependencies']['nextcloud']['@attributes']['min-version'])) {
-			$requireMin = $appInfo['dependencies']['nextcloud']['@attributes']['min-version'];
-		} elseif (isset($appInfo['dependencies']['owncloud']['@attributes']['min-version'])) {
-			$requireMin = $appInfo['dependencies']['owncloud']['@attributes']['min-version'];
-		} else if (isset($appInfo['requiremin'])) {
-			$requireMin = $appInfo['requiremin'];
-		} else if (isset($appInfo['require'])) {
-			$requireMin = $appInfo['require'];
-		}
-
-		if (isset($appInfo['dependencies']['nextcloud']['@attributes']['max-version'])) {
-			$requireMax = $appInfo['dependencies']['nextcloud']['@attributes']['max-version'];
-		} elseif (isset($appInfo['dependencies']['owncloud']['@attributes']['max-version'])) {
-			$requireMax = $appInfo['dependencies']['owncloud']['@attributes']['max-version'];
-		} else if (isset($appInfo['requiremax'])) {
-			$requireMax = $appInfo['requiremax'];
-		}
-
-		if (is_array($ocVersion)) {
-			$ocVersion = implode('.', $ocVersion);
-		}
-
-		if (!empty($requireMin)
-			&& version_compare(self::adjustVersionParts($ocVersion, $requireMin), $requireMin, '<')
-		) {
-
-			return false;
-		}
-
-		if (!empty($requireMax)
-			&& version_compare(self::adjustVersionParts($ocVersion, $requireMax), $requireMax, '>')
-		) {
-			return false;
-		}
-
-		return true;
-	}
-
-	/**
-	 * get the installed version of all apps
-	 */
-	public static function getAppVersions() {
-		static $versions;
-
-		if(!$versions) {
-			$appConfig = \OC::$server->getAppConfig();
-			$versions = $appConfig->getValues(false, 'installed_version');
-		}
-		return $versions;
-	}
-
-	/**
-	 * @param string $app
-	 * @param \OCP\IConfig $config
-	 * @param \OCP\IL10N $l
-	 * @return bool
-	 *
-	 * @throws Exception if app is not compatible with this version of ownCloud
-	 * @throws Exception if no app-name was specified
-	 */
-	public function installApp($app,
-							   \OCP\IConfig $config,
-							   \OCP\IL10N $l) {
-		if ($app !== false) {
-			// check if the app is compatible with this version of ownCloud
-			$info = self::getAppInfo($app);
-			if(!is_array($info)) {
-				throw new \Exception(
-					$l->t('App "%s" cannot be installed because appinfo file cannot be read.',
-						[$info['name']]
-					)
-				);
-			}
-
-			$version = \OCP\Util::getVersion();
-			if (!self::isAppCompatible($version, $info)) {
-				throw new \Exception(
-					$l->t('App "%s" cannot be installed because it is not compatible with this version of the server.',
-						array($info['name'])
-					)
-				);
-			}
-
-			// check for required dependencies
-			self::checkAppDependencies($config, $l, $info);
-
-			$config->setAppValue($app, 'enabled', 'yes');
-			if (isset($appData['id'])) {
-				$config->setAppValue($app, 'ocsid', $appData['id']);
-			}
-
-			if(isset($info['settings']) && is_array($info['settings'])) {
-				$appPath = self::getAppPath($app);
-				self::registerAutoloading($app, $appPath);
-				\OC::$server->getSettingsManager()->setupSettings($info['settings']);
-			}
-
-			\OC_Hook::emit('OC_App', 'post_enable', array('app' => $app));
-		} else {
-			if(empty($appName) ) {
-				throw new \Exception($l->t("No app name specified"));
-			} else {
-				throw new \Exception($l->t("App '%s' could not be installed!", $appName));
-			}
-		}
-
-		return $app;
-	}
-
-	/**
-	 * update the database for the app and call the update script
-	 *
-	 * @param string $appId
-	 * @return bool
-	 */
-	public static function updateApp($appId) {
-		$appPath = self::getAppPath($appId);
-		if($appPath === false) {
-			return false;
-		}
-		$appData = self::getAppInfo($appId);
-		self::executeRepairSteps($appId, $appData['repair-steps']['pre-migration']);
-		if (file_exists($appPath . '/appinfo/database.xml')) {
-			OC_DB::updateDbFromStructure($appPath . '/appinfo/database.xml');
-		}
-		self::executeRepairSteps($appId, $appData['repair-steps']['post-migration']);
-		self::setupLiveMigrations($appId, $appData['repair-steps']['live-migration']);
-		unset(self::$appVersion[$appId]);
-		// run upgrade code
-		if (file_exists($appPath . '/appinfo/update.php')) {
-			self::loadApp($appId);
-			include $appPath . '/appinfo/update.php';
-		}
-		self::setupBackgroundJobs($appData['background-jobs']);
-		if(isset($appData['settings']) && is_array($appData['settings'])) {
-			$appPath = self::getAppPath($appId);
-			self::registerAutoloading($appId, $appPath);
-			\OC::$server->getSettingsManager()->setupSettings($appData['settings']);
-		}
-
-		//set remote/public handlers
-		if (array_key_exists('ocsid', $appData)) {
-			\OC::$server->getConfig()->setAppValue($appId, 'ocsid', $appData['ocsid']);
-		} elseif(\OC::$server->getConfig()->getAppValue($appId, 'ocsid', null) !== null) {
-			\OC::$server->getConfig()->deleteAppValue($appId, 'ocsid');
-		}
-		foreach ($appData['remote'] as $name => $path) {
-			\OC::$server->getConfig()->setAppValue('core', 'remote_' . $name, $appId . '/' . $path);
-		}
-		foreach ($appData['public'] as $name => $path) {
-			\OC::$server->getConfig()->setAppValue('core', 'public_' . $name, $appId . '/' . $path);
-		}
-
-		self::setAppTypes($appId);
-
-		$version = \OC_App::getAppVersion($appId);
-		\OC::$server->getAppConfig()->setValue($appId, 'installed_version', $version);
-
-		\OC::$server->getEventDispatcher()->dispatch(ManagerEvent::EVENT_APP_UPDATE, new ManagerEvent(
-			ManagerEvent::EVENT_APP_UPDATE, $appId
-		));
-
-		return true;
-	}
-
-	/**
-	 * @param string $appId
-	 * @param string[] $steps
-	 * @throws \OC\NeedsUpdateException
-	 */
-	public static function executeRepairSteps($appId, array $steps) {
-		if (empty($steps)) {
-			return;
-		}
-		// load the app
-		self::loadApp($appId);
-
-		$dispatcher = OC::$server->getEventDispatcher();
-
-		// load the steps
-		$r = new Repair([], $dispatcher);
-		foreach ($steps as $step) {
-			try {
-				$r->addStep($step);
-			} catch (Exception $ex) {
-				$r->emit('\OC\Repair', 'error', [$ex->getMessage()]);
-				\OC::$server->getLogger()->logException($ex);
-			}
-		}
-		// run the steps
-		$r->run();
-	}
-
-	public static function setupBackgroundJobs(array $jobs) {
-		$queue = \OC::$server->getJobList();
-		foreach ($jobs as $job) {
-			$queue->add($job);
-		}
-	}
-
-	/**
-	 * @param string $appId
-	 * @param string[] $steps
-	 */
-	private static function setupLiveMigrations($appId, array $steps) {
-		$queue = \OC::$server->getJobList();
-		foreach ($steps as $step) {
-			$queue->add('OC\Migration\BackgroundRepair', [
-				'app' => $appId,
-				'step' => $step]);
-		}
-	}
-
-	/**
-	 * @param string $appId
-	 * @return \OC\Files\View|false
-	 */
-	public static function getStorage($appId) {
-		if (OC_App::isEnabled($appId)) { //sanity check
-			if (\OC::$server->getUserSession()->isLoggedIn()) {
-				$view = new \OC\Files\View('/' . OC_User::getUser());
-				if (!$view->file_exists($appId)) {
-					$view->mkdir($appId);
-				}
-				return new \OC\Files\View('/' . OC_User::getUser() . '/' . $appId);
-			} else {
-				\OCP\Util::writeLog('core', 'Can\'t get app storage, app ' . $appId . ', user not logged in', \OCP\Util::ERROR);
-				return false;
-			}
-		} else {
-			\OCP\Util::writeLog('core', 'Can\'t get app storage, app ' . $appId . ' not enabled', \OCP\Util::ERROR);
-			return false;
-		}
-	}
-
-	protected static function findBestL10NOption($options, $lang) {
-		$fallback = $similarLangFallback = $englishFallback = false;
-
-		$lang = strtolower($lang);
-		$similarLang = $lang;
-		if (strpos($similarLang, '_')) {
-			// For "de_DE" we want to find "de" and the other way around
-			$similarLang = substr($lang, 0, strpos($lang, '_'));
-		}
-
-		foreach ($options as $option) {
-			if (is_array($option)) {
-				if ($fallback === false) {
-					$fallback = $option['@value'];
-				}
-
-				if (!isset($option['@attributes']['lang'])) {
-					continue;
-				}
-
-				$attributeLang = strtolower($option['@attributes']['lang']);
-				if ($attributeLang === $lang) {
-					return $option['@value'];
-				}
-
-				if ($attributeLang === $similarLang) {
-					$similarLangFallback = $option['@value'];
-				} else if (strpos($attributeLang, $similarLang . '_') === 0) {
-					if ($similarLangFallback === false) {
-						$similarLangFallback =  $option['@value'];
-					}
-				}
-			} else {
-				$englishFallback = $option;
-			}
-		}
-
-		if ($similarLangFallback !== false) {
-			return $similarLangFallback;
-		} else if ($englishFallback !== false) {
-			return $englishFallback;
-		}
-		return (string) $fallback;
-	}
-
-	/**
-	 * parses the app data array and enhanced the 'description' value
-	 *
-	 * @param array $data the app data
-	 * @param string $lang
-	 * @return array improved app data
-	 */
-	public static function parseAppInfo(array $data, $lang = null) {
-
-		if ($lang && isset($data['name']) && is_array($data['name'])) {
-			$data['name'] = self::findBestL10NOption($data['name'], $lang);
-		}
-		if ($lang && isset($data['summary']) && is_array($data['summary'])) {
-			$data['summary'] = self::findBestL10NOption($data['summary'], $lang);
-		}
-		if ($lang && isset($data['description']) && is_array($data['description'])) {
-			$data['description'] = trim(self::findBestL10NOption($data['description'], $lang));
-		} else if (isset($data['description']) && is_string($data['description'])) {
-			$data['description'] = trim($data['description']);
-		} else  {
-			$data['description'] = '';
-		}
-
-		return $data;
-	}
-
-	/**
-	 * @param \OCP\IConfig $config
-	 * @param \OCP\IL10N $l
-	 * @param array $info
-	 * @throws \Exception
-	 */
-	protected static function checkAppDependencies($config, $l, $info) {
-		$dependencyAnalyzer = new DependencyAnalyzer(new Platform($config), $l);
-		$missing = $dependencyAnalyzer->analyze($info);
-		if (!empty($missing)) {
-			$missingMsg = join(PHP_EOL, $missing);
-			throw new \Exception(
-				$l->t('App "%s" cannot be installed because the following dependencies are not fulfilled: %s',
-					[$info['name'], $missingMsg]
-				)
-			);
-		}
-	}
+    static private $appVersion = [];
+    static private $adminForms = array();
+    static private $personalForms = array();
+    static private $appInfo = array();
+    static private $appTypes = array();
+    static private $loadedApps = array();
+    static private $altLogin = array();
+    static private $alreadyRegistered = [];
+    const officialApp = 200;
+
+    /**
+     * clean the appId
+     *
+     * @param string|boolean $app AppId that needs to be cleaned
+     * @return string
+     */
+    public static function cleanAppId($app) {
+        return str_replace(array('\0', '/', '\\', '..'), '', $app);
+    }
+
+    /**
+     * Check if an app is loaded
+     *
+     * @param string $app
+     * @return bool
+     */
+    public static function isAppLoaded($app) {
+        return in_array($app, self::$loadedApps, true);
+    }
+
+    /**
+     * loads all apps
+     *
+     * @param string[] | string | null $types
+     * @return bool
+     *
+     * This function walks through the ownCloud directory and loads all apps
+     * it can find. A directory contains an app if the file /appinfo/info.xml
+     * exists.
+     *
+     * if $types is set, only apps of those types will be loaded
+     */
+    public static function loadApps($types = null) {
+        if (\OC::$server->getSystemConfig()->getValue('maintenance', false)) {
+            return false;
+        }
+        // Load the enabled apps here
+        $apps = self::getEnabledApps();
+
+        // Add each apps' folder as allowed class path
+        foreach($apps as $app) {
+            $path = self::getAppPath($app);
+            if($path !== false) {
+                self::registerAutoloading($app, $path);
+            }
+        }
+
+        // prevent app.php from printing output
+        ob_start();
+        foreach ($apps as $app) {
+            if ((is_null($types) or self::isType($app, $types)) && !in_array($app, self::$loadedApps)) {
+                self::loadApp($app);
+            }
+        }
+        ob_end_clean();
+
+        return true;
+    }
+
+    /**
+     * load a single app
+     *
+     * @param string $app
+     */
+    public static function loadApp($app) {
+        self::$loadedApps[] = $app;
+        $appPath = self::getAppPath($app);
+        if($appPath === false) {
+            return;
+        }
+
+        // in case someone calls loadApp() directly
+        self::registerAutoloading($app, $appPath);
+
+        if (is_file($appPath . '/appinfo/app.php')) {
+            \OC::$server->getEventLogger()->start('load_app_' . $app, 'Load app: ' . $app);
+            self::requireAppFile($app);
+            if (self::isType($app, array('authentication'))) {
+                // since authentication apps affect the "is app enabled for group" check,
+                // the enabled apps cache needs to be cleared to make sure that the
+                // next time getEnableApps() is called it will also include apps that were
+                // enabled for groups
+                self::$enabledAppsCache = array();
+            }
+            \OC::$server->getEventLogger()->end('load_app_' . $app);
+        }
+
+        $info = self::getAppInfo($app);
+        if (!empty($info['activity']['filters'])) {
+            foreach ($info['activity']['filters'] as $filter) {
+                \OC::$server->getActivityManager()->registerFilter($filter);
+            }
+        }
+        if (!empty($info['activity']['settings'])) {
+            foreach ($info['activity']['settings'] as $setting) {
+                \OC::$server->getActivityManager()->registerSetting($setting);
+            }
+        }
+        if (!empty($info['activity']['providers'])) {
+            foreach ($info['activity']['providers'] as $provider) {
+                \OC::$server->getActivityManager()->registerProvider($provider);
+            }
+        }
+    }
+
+    /**
+     * @internal
+     * @param string $app
+     * @param string $path
+     */
+    public static function registerAutoloading($app, $path) {
+        $key = $app . '-' . $path;
+        if(isset(self::$alreadyRegistered[$key])) {
+            return;
+        }
+        self::$alreadyRegistered[$key] = true;
+        // Register on PSR-4 composer autoloader
+        $appNamespace = \OC\AppFramework\App::buildAppNamespace($app);
+        \OC::$server->registerNamespace($app, $appNamespace);
+        \OC::$composerAutoloader->addPsr4($appNamespace . '\\', $path . '/lib/', true);
+        if (defined('PHPUNIT_RUN') || defined('CLI_TEST_RUN')) {
+            \OC::$composerAutoloader->addPsr4($appNamespace . '\\Tests\\', $path . '/tests/', true);
+        }
+
+        // Register on legacy autoloader
+        \OC::$loader->addValidRoot($path);
+    }
+
+    /**
+     * Load app.php from the given app
+     *
+     * @param string $app app name
+     */
+    private static function requireAppFile($app) {
+        try {
+            // encapsulated here to avoid variable scope conflicts
+            require_once $app . '/appinfo/app.php';
+        } catch (Error $ex) {
+            \OC::$server->getLogger()->logException($ex);
+            $blacklist = \OC::$server->getAppManager()->getAlwaysEnabledApps();
+            if (!in_array($app, $blacklist)) {
+                self::disable($app);
+            }
+        }
+    }
+
+    /**
+     * check if an app is of a specific type
+     *
+     * @param string $app
+     * @param string|array $types
+     * @return bool
+     */
+    public static function isType($app, $types) {
+        if (is_string($types)) {
+            $types = array($types);
+        }
+        $appTypes = self::getAppTypes($app);
+        foreach ($types as $type) {
+            if (array_search($type, $appTypes) !== false) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * get the types of an app
+     *
+     * @param string $app
+     * @return array
+     */
+    private static function getAppTypes($app) {
+        //load the cache
+        if (count(self::$appTypes) == 0) {
+            self::$appTypes = \OC::$server->getAppConfig()->getValues(false, 'types');
+        }
+
+        if (isset(self::$appTypes[$app])) {
+            return explode(',', self::$appTypes[$app]);
+        } else {
+            return array();
+        }
+    }
+
+    /**
+     * read app types from info.xml and cache them in the database
+     */
+    public static function setAppTypes($app) {
+        $appData = self::getAppInfo($app);
+        if(!is_array($appData)) {
+            return;
+        }
+
+        if (isset($appData['types'])) {
+            $appTypes = implode(',', $appData['types']);
+        } else {
+            $appTypes = '';
+            $appData['types'] = [];
+        }
+
+        \OC::$server->getAppConfig()->setValue($app, 'types', $appTypes);
+
+        if (\OC::$server->getAppManager()->hasProtectedAppType($appData['types'])) {
+            $enabled = \OC::$server->getAppConfig()->getValue($app, 'enabled', 'yes');
+            if ($enabled !== 'yes' && $enabled !== 'no') {
+                \OC::$server->getAppConfig()->setValue($app, 'enabled', 'yes');
+            }
+        }
+    }
+
+    /**
+     * check if app is shipped
+     *
+     * @param string $appId the id of the app to check
+     * @return bool
+     *
+     * Check if an app that is installed is a shipped app or installed from the appstore.
+     */
+    public static function isShipped($appId) {
+        return \OC::$server->getAppManager()->isShipped($appId);
+    }
+
+    /**
+     * get all enabled apps
+     */
+    protected static $enabledAppsCache = array();
+
+    /**
+     * Returns apps enabled for the current user.
+     *
+     * @param bool $forceRefresh whether to refresh the cache
+     * @param bool $all whether to return apps for all users, not only the
+     * currently logged in one
+     * @return string[]
+     */
+    public static function getEnabledApps($forceRefresh = false, $all = false) {
+        if (!\OC::$server->getSystemConfig()->getValue('installed', false)) {
+            return array();
+        }
+        // in incognito mode or when logged out, $user will be false,
+        // which is also the case during an upgrade
+        $appManager = \OC::$server->getAppManager();
+        if ($all) {
+            $user = null;
+        } else {
+            $user = \OC::$server->getUserSession()->getUser();
+        }
+
+        if (is_null($user)) {
+            $apps = $appManager->getInstalledApps();
+        } else {
+            $apps = $appManager->getEnabledAppsForUser($user);
+        }
+        $apps = array_filter($apps, function ($app) {
+            return $app !== 'files';//we add this manually
+        });
+        sort($apps);
+        array_unshift($apps, 'files');
+        return $apps;
+    }
+
+    /**
+     * checks whether or not an app is enabled
+     *
+     * @param string $app app
+     * @return bool
+     *
+     * This function checks whether or not an app is enabled.
+     */
+    public static function isEnabled($app) {
+        return \OC::$server->getAppManager()->isEnabledForUser($app);
+    }
+
+    /**
+     * enables an app
+     *
+     * @param string $appId
+     * @param array $groups (optional) when set, only these groups will have access to the app
+     * @throws \Exception
+     * @return void
+     *
+     * This function set an app as enabled in appconfig.
+     */
+    public function enable($appId,
+                            $groups = null) {
+        self::$enabledAppsCache = []; // flush
+        $l = \OC::$server->getL10N('core');
+        $config = \OC::$server->getConfig();
+
+        // Check if app is already downloaded
+        $installer = new Installer(
+            \OC::$server->getAppFetcher(),
+            \OC::$server->getHTTPClientService(),
+            \OC::$server->getTempManager(),
+            \OC::$server->getLogger()
+        );
+        $isDownloaded = $installer->isDownloaded($appId);
+
+        if(!$isDownloaded) {
+            $installer->downloadApp($appId);
+        }
+
+        if (!Installer::isInstalled($appId)) {
+            $appId = self::installApp(
+                $appId,
+                $config,
+                $l
+            );
+            $appPath = self::getAppPath($appId);
+            self::registerAutoloading($appId, $appPath);
+            $installer->installApp($appId);
+        } else {
+            // check for required dependencies
+            $info = self::getAppInfo($appId);
+            self::checkAppDependencies($config, $l, $info);
+            $appPath = self::getAppPath($appId);
+            self::registerAutoloading($appId, $appPath);
+            $installer->installApp($appId);
+        }
+
+        $appManager = \OC::$server->getAppManager();
+        if (!is_null($groups)) {
+            $groupManager = \OC::$server->getGroupManager();
+            $groupsList = [];
+            foreach ($groups as $group) {
+                $groupItem = $groupManager->get($group);
+                if ($groupItem instanceof \OCP\IGroup) {
+                    $groupsList[] = $groupManager->get($group);
+                }
+            }
+            $appManager->enableAppForGroups($appId, $groupsList);
+        } else {
+            $appManager->enableApp($appId);
+        }
+
+        $info = self::getAppInfo($appId);
+        if(isset($info['settings']) && is_array($info['settings'])) {
+            $appPath = self::getAppPath($appId);
+            self::registerAutoloading($appId, $appPath);
+            \OC::$server->getSettingsManager()->setupSettings($info['settings']);
+        }
+    }
+
+    /**
+     * @param string $app
+     * @return bool
+     */
+    public static function removeApp($app) {
+        if (self::isShipped($app)) {
+            return false;
+        }
+
+        $installer = new Installer(
+            \OC::$server->getAppFetcher(),
+            \OC::$server->getHTTPClientService(),
+            \OC::$server->getTempManager(),
+            \OC::$server->getLogger()
+        );
+        return $installer->removeApp($app);
+    }
+
+    /**
+     * This function set an app as disabled in appconfig.
+     *
+     * @param string $app app
+     * @throws Exception
+     */
+    public static function disable($app) {
+        // flush
+        self::$enabledAppsCache = array();
+
+        // run uninstall steps
+        $appData = OC_App::getAppInfo($app);
+        if (!is_null($appData)) {
+            OC_App::executeRepairSteps($app, $appData['repair-steps']['uninstall']);
+        }
+
+        // emit disable hook - needed anymore ?
+        \OC_Hook::emit('OC_App', 'pre_disable', array('app' => $app));
+
+        // finally disable it
+        $appManager = \OC::$server->getAppManager();
+        $appManager->disableApp($app);
+    }
+
+    /**
+     * Returns the Settings Navigation
+     *
+     * @return string[]
+     *
+     * This function returns an array containing all settings pages added. The
+     * entries are sorted by the key 'order' ascending.
+     */
+    public static function getSettingsNavigation() {
+        $l = \OC::$server->getL10N('lib');
+        $urlGenerator = \OC::$server->getURLGenerator();
+
+        $settings = array();
+        // by default, settings only contain the help menu
+        if (\OC::$server->getSystemConfig()->getValue('knowledgebaseenabled', true)) {
+            $settings = array(
+                array(
+                    "id" => "help",
+                    "order" => 4,
+                    "href" => $urlGenerator->linkToRoute('settings_help'),
+                    "name" => $l->t("Help"),
+                    "icon" => $urlGenerator->imagePath("settings", "help.svg")
+                )
+            );
+        }
+
+        // if the user is logged-in
+        if (\OC::$server->getUserSession()->isLoggedIn()) {
+            // personal menu
+            $settings[] = array(
+                "id" => "personal",
+                "order" => 1,
+                "href" => $urlGenerator->linkToRoute('settings_personal'),
+                "name" => $l->t("Personal"),
+                "icon" => $urlGenerator->imagePath("settings", "personal.svg")
+            );
+
+            //SubAdmins are also allowed to access user management
+            $userObject = \OC::$server->getUserSession()->getUser();
+            $isSubAdmin = false;
+            if($userObject !== null) {
+                $isSubAdmin = \OC::$server->getGroupManager()->getSubAdmin()->isSubAdmin($userObject);
+            }
+            if ($isSubAdmin) {
+                // admin users menu
+                $settings[] = array(
+                    "id" => "core_users",
+                    "order" => 3,
+                    "href" => $urlGenerator->linkToRoute('settings_users'),
+                    "name" => $l->t("Users"),
+                    "icon" => $urlGenerator->imagePath("settings", "users.svg")
+                );
+            }
+
+            // if the user is an admin
+            if (OC_User::isAdminUser(OC_User::getUser())) {
+                // admin settings
+                $settings[] = array(
+                    "id" => "admin",
+                    "order" => 2,
+                    "href" => $urlGenerator->linkToRoute('settings.AdminSettings.index'),
+                    "name" => $l->t("Admin"),
+                    "icon" => $urlGenerator->imagePath("settings", "admin.svg")
+                );
+            }
+        }
+
+        $navigation = self::proceedNavigation($settings);
+        return $navigation;
+    }
+
+    // This is private as well. It simply works, so don't ask for more details
+    private static function proceedNavigation($list) {
+        $headerIconCount = 8;
+        if(OC_User::isAdminUser(OC_User::getUser())) {
+            $headerIconCount--;
+        }
+        usort($list, function($a, $b) {
+            if (isset($a['order']) && isset($b['order'])) {
+                return ($a['order'] < $b['order']) ? -1 : 1;
+            } else if (isset($a['order']) || isset($b['order'])) {
+                return isset($a['order']) ? -1 : 1;
+            } else {
+                return ($a['name'] < $b['name']) ? -1 : 1;
+            }
+        });
+
+        $activeAppIndex = -1;
+        $activeApp = OC::$server->getNavigationManager()->getActiveEntry();
+        foreach ($list as $index => &$navEntry) {
+            if ($navEntry['id'] == $activeApp) {
+                $navEntry['active'] = true;
+                $activeAppIndex = $index;
+            } else {
+                $navEntry['active'] = false;
+            }
+        }
+        unset($navEntry);
+
+        if($activeAppIndex > ($headerIconCount-1)) {
+            $active = $list[$activeAppIndex];
+            $lastInHeader = $list[$headerIconCount-1];
+            $list[$headerIconCount-1] = $active;
+            $list[$activeAppIndex] = $lastInHeader;
+        }
+
+        foreach ($list as $index => &$navEntry) {
+            $navEntry['showInHeader'] = false;
+            if($index < $headerIconCount) {
+                $navEntry['showInHeader'] = true;
+            }
+        }
+
+
+
+        return $list;
+    }
+
+    public static function proceedAppNavigation($entries) {
+        $headerIconCount = 8;
+        if(OC_User::isAdminUser(OC_User::getUser())) {
+            $headerIconCount--;
+        }
+        $activeAppIndex = -1;
+        $list = self::proceedNavigation($entries);
+
+        $activeApp = OC::$server->getNavigationManager()->getActiveEntry();
+        foreach ($list as $index => &$navEntry) {
+            if ($navEntry['id'] == $activeApp) {
+                $navEntry['active'] = true;
+                $activeAppIndex = $index;
+            } else {
+                $navEntry['active'] = false;
+            }
+        }
+        // move active item to last position
+        if($activeAppIndex > ($headerIconCount-1)) {
+            $active = $list[$activeAppIndex];
+            $lastInHeader = $list[$headerIconCount-1];
+            $list[$headerIconCount-1] = $active;
+            $list[$activeAppIndex] = $lastInHeader;
+        }
+        $list = array_slice($list, 0, $headerIconCount);
+
+        return $list;
+    }
+
+    /**
+     * Get the path where to install apps
+     *
+     * @return string|false
+     */
+    public static function getInstallPath() {
+        if (\OC::$server->getSystemConfig()->getValue('appstoreenabled', true) == false) {
+            return false;
+        }
+
+        foreach (OC::$APPSROOTS as $dir) {
+            if (isset($dir['writable']) && $dir['writable'] === true) {
+                return $dir['path'];
+            }
+        }
+
+        \OCP\Util::writeLog('core', 'No application directories are marked as writable.', \OCP\Util::ERROR);
+        return null;
+    }
+
+
+    /**
+     * search for an app in all app-directories
+     *
+     * @param string $appId
+     * @return false|string
+     */
+    public static function findAppInDirectories($appId) {
+        $sanitizedAppId = self::cleanAppId($appId);
+        if($sanitizedAppId !== $appId) {
+            return false;
+        }
+        static $app_dir = array();
+
+        if (isset($app_dir[$appId])) {
+            return $app_dir[$appId];
+        }
+
+        $possibleApps = array();
+        foreach (OC::$APPSROOTS as $dir) {
+            if (file_exists($dir['path'] . '/' . $appId)) {
+                $possibleApps[] = $dir;
+            }
+        }
+
+        if (empty($possibleApps)) {
+            return false;
+        } elseif (count($possibleApps) === 1) {
+            $dir = array_shift($possibleApps);
+            $app_dir[$appId] = $dir;
+            return $dir;
+        } else {
+            $versionToLoad = array();
+            foreach ($possibleApps as $possibleApp) {
+                $version = self::getAppVersionByPath($possibleApp['path']);
+                if (empty($versionToLoad) || version_compare($version, $versionToLoad['version'], '>')) {
+                    $versionToLoad = array(
+                        'dir' => $possibleApp,
+                        'version' => $version,
+                    );
+                }
+            }
+            $app_dir[$appId] = $versionToLoad['dir'];
+            return $versionToLoad['dir'];
+            //TODO - write test
+        }
+    }
+
+    /**
+     * Get the directory for the given app.
+     * If the app is defined in multiple directories, the first one is taken. (false if not found)
+     *
+     * @param string $appId
+     * @return string|false
+     */
+    public static function getAppPath($appId) {
+        if ($appId === null || trim($appId) === '') {
+            return false;
+        }
+
+        if (($dir = self::findAppInDirectories($appId)) != false) {
+            return $dir['path'] . '/' . $appId;
+        }
+        return false;
+    }
+
+    /**
+     * Get the path for the given app on the access
+     * If the app is defined in multiple directories, the first one is taken. (false if not found)
+     *
+     * @param string $appId
+     * @return string|false
+     */
+    public static function getAppWebPath($appId) {
+        if (($dir = self::findAppInDirectories($appId)) != false) {
+            return OC::$WEBROOT . $dir['url'] . '/' . $appId;
+        }
+        return false;
+    }
+
+    /**
+     * get the last version of the app from appinfo/info.xml
+     *
+     * @param string $appId
+     * @param bool $useCache
+     * @return string
+     */
+    public static function getAppVersion($appId, $useCache = true) {
+        if($useCache && isset(self::$appVersion[$appId])) {
+            return self::$appVersion[$appId];
+        }
+
+        $file = self::getAppPath($appId);
+        self::$appVersion[$appId] = ($file !== false) ? self::getAppVersionByPath($file) : '0';
+        return self::$appVersion[$appId];
+    }
+
+    /**
+     * get app's version based on it's path
+     *
+     * @param string $path
+     * @return string
+     */
+    public static function getAppVersionByPath($path) {
+        $infoFile = $path . '/appinfo/info.xml';
+        $appData = self::getAppInfo($infoFile, true);
+        return isset($appData['version']) ? $appData['version'] : '';
+    }
+
+
+    /**
+     * Read all app metadata from the info.xml file
+     *
+     * @param string $appId id of the app or the path of the info.xml file
+     * @param bool $path
+     * @param string $lang
+     * @return array|null
+     * @note all data is read from info.xml, not just pre-defined fields
+     */
+    public static function getAppInfo($appId, $path = false, $lang = null) {
+        if ($path) {
+            $file = $appId;
+        } else {
+            if ($lang === null && isset(self::$appInfo[$appId])) {
+                return self::$appInfo[$appId];
+            }
+            $appPath = self::getAppPath($appId);
+            if($appPath === false) {
+                return null;
+            }
+            $file = $appPath . '/appinfo/info.xml';
+        }
+
+        $parser = new InfoParser(\OC::$server->getMemCacheFactory()->create('core.appinfo'));
+        $data = $parser->parse($file);
+
+        if (is_array($data)) {
+            $data = OC_App::parseAppInfo($data, $lang);
+        }
+        if(isset($data['ocsid'])) {
+            $storedId = \OC::$server->getConfig()->getAppValue($appId, 'ocsid');
+            if($storedId !== '' && $storedId !== $data['ocsid']) {
+                $data['ocsid'] = $storedId;
+            }
+        }
+
+        if ($lang === null) {
+            self::$appInfo[$appId] = $data;
+        }
+
+        return $data;
+    }
+
+    /**
+     * Returns the navigation
+     *
+     * @return array
+     *
+     * This function returns an array containing all entries added. The
+     * entries are sorted by the key 'order' ascending. Additional to the keys
+     * given for each app the following keys exist:
+     *   - active: boolean, signals if the user is on this navigation entry
+     */
+    public static function getNavigation() {
+        $entries = OC::$server->getNavigationManager()->getAll();
+        $navigation = self::proceedNavigation($entries);
+        return $navigation;
+    }
+
+    /**
+     * Returns the navigation inside the header bar
+     *
+     * @return array
+     *
+     * This function returns an array containing all entries added. The
+     * entries are sorted by the key 'order' ascending. Additional to the keys
+     * given for each app the following keys exist:
+     *   - active: boolean, signals if the user is on this navigation entry
+     */
+    public static function getHeaderNavigation() {
+        $entries = OC::$server->getNavigationManager()->getAll();
+        $navigation = self::proceedAppNavigation($entries);
+        return $navigation;
+    }
+
+    /**
+     * get the id of loaded app
+     *
+     * @return string
+     */
+    public static function getCurrentApp() {
+        $request = \OC::$server->getRequest();
+        $script = substr($request->getScriptName(), strlen(OC::$WEBROOT) + 1);
+        $topFolder = substr($script, 0, strpos($script, '/'));
+        if (empty($topFolder)) {
+            $path_info = $request->getPathInfo();
+            if ($path_info) {
+                $topFolder = substr($path_info, 1, strpos($path_info, '/', 1) - 1);
+            }
+        }
+        if ($topFolder == 'apps') {
+            $length = strlen($topFolder);
+            return substr($script, $length + 1, strpos($script, '/', $length + 1) - $length - 1);
+        } else {
+            return $topFolder;
+        }
+    }
+
+    /**
+     * @param string $type
+     * @return array
+     */
+    public static function getForms($type) {
+        $forms = array();
+        switch ($type) {
+            case 'admin':
+                $source = self::$adminForms;
+                break;
+            case 'personal':
+                $source = self::$personalForms;
+                break;
+            default:
+                return array();
+        }
+        foreach ($source as $form) {
+            $forms[] = include $form;
+        }
+        return $forms;
+    }
+
+    /**
+     * register an admin form to be shown
+     *
+     * @param string $app
+     * @param string $page
+     */
+    public static function registerAdmin($app, $page) {
+        self::$adminForms[] = $app . '/' . $page . '.php';
+    }
+
+    /**
+     * register a personal form to be shown
+     * @param string $app
+     * @param string $page
+     */
+    public static function registerPersonal($app, $page) {
+        self::$personalForms[] = $app . '/' . $page . '.php';
+    }
+
+    /**
+     * @param array $entry
+     */
+    public static function registerLogIn(array $entry) {
+        self::$altLogin[] = $entry;
+    }
+
+    /**
+     * @return array
+     */
+    public static function getAlternativeLogIns() {
+        return self::$altLogin;
+    }
+
+    /**
+     * get a list of all apps in the apps folder
+     *
+     * @return array an array of app names (string IDs)
+     * @todo: change the name of this method to getInstalledApps, which is more accurate
+     */
+    public static function getAllApps() {
+
+        $apps = array();
+
+        foreach (OC::$APPSROOTS as $apps_dir) {
+            if (!is_readable($apps_dir['path'])) {
+                \OCP\Util::writeLog('core', 'unable to read app folder : ' . $apps_dir['path'], \OCP\Util::WARN);
+                continue;
+            }
+            $dh = opendir($apps_dir['path']);
+
+            if (is_resource($dh)) {
+                while (($file = readdir($dh)) !== false) {
+
+                    if ($file[0] != '.' and is_dir($apps_dir['path'] . '/' . $file) and is_file($apps_dir['path'] . '/' . $file . '/appinfo/info.xml')) {
+
+                        $apps[] = $file;
+                    }
+                }
+            }
+        }
+
+        return $apps;
+    }
+
+    /**
+     * List all apps, this is used in apps.php
+     *
+     * @return array
+     */
+    public function listAllApps() {
+        $installedApps = OC_App::getAllApps();
+
+        //we don't want to show configuration for these
+        $blacklist = \OC::$server->getAppManager()->getAlwaysEnabledApps();
+        $appList = array();
+        $langCode = \OC::$server->getL10N('core')->getLanguageCode();
+        $urlGenerator = \OC::$server->getURLGenerator();
+
+        foreach ($installedApps as $app) {
+            if (array_search($app, $blacklist) === false) {
+
+                $info = OC_App::getAppInfo($app, false, $langCode);
+                if (!is_array($info)) {
+                    \OCP\Util::writeLog('core', 'Could not read app info file for app "' . $app . '"', \OCP\Util::ERROR);
+                    continue;
+                }
+
+                if (!isset($info['name'])) {
+                    \OCP\Util::writeLog('core', 'App id "' . $app . '" has no name in appinfo', \OCP\Util::ERROR);
+                    continue;
+                }
+
+                $enabled = \OC::$server->getAppConfig()->getValue($app, 'enabled', 'no');
+                $info['groups'] = null;
+                if ($enabled === 'yes') {
+                    $active = true;
+                } else if ($enabled === 'no') {
+                    $active = false;
+                } else {
+                    $active = true;
+                    $info['groups'] = $enabled;
+                }
+
+                $info['active'] = $active;
+
+                if (self::isShipped($app)) {
+                    $info['internal'] = true;
+                    $info['level'] = self::officialApp;
+                    $info['removable'] = false;
+                } else {
+                    $info['internal'] = false;
+                    $info['removable'] = true;
+                }
+
+                $appPath = self::getAppPath($app);
+                if($appPath !== false) {
+                    $appIcon = $appPath . '/img/' . $app . '.svg';
+                    if (file_exists($appIcon)) {
+                        $info['preview'] = \OC::$server->getURLGenerator()->imagePath($app, $app . '.svg');
+                        $info['previewAsIcon'] = true;
+                    } else {
+                        $appIcon = $appPath . '/img/app.svg';
+                        if (file_exists($appIcon)) {
+                            $info['preview'] = \OC::$server->getURLGenerator()->imagePath($app, 'app.svg');
+                            $info['previewAsIcon'] = true;
+                        }
+                    }
+                }
+                // fix documentation
+                if (isset($info['documentation']) && is_array($info['documentation'])) {
+                    foreach ($info['documentation'] as $key => $url) {
+                        // If it is not an absolute URL we assume it is a key
+                        // i.e. admin-ldap will get converted to go.php?to=admin-ldap
+                        if (stripos($url, 'https://') !== 0 && stripos($url, 'http://') !== 0) {
+                            $url = $urlGenerator->linkToDocs($url);
+                        }
+
+                        $info['documentation'][$key] = $url;
+                    }
+                }
+
+                $info['version'] = OC_App::getAppVersion($app);
+                $appList[] = $info;
+            }
+        }
+
+        return $appList;
+    }
+
+    /**
+     * Returns the internal app ID or false
+     * @param string $ocsID
+     * @return string|false
+     */
+    public static function getInternalAppIdByOcs($ocsID) {
+        if(is_numeric($ocsID)) {
+            $idArray = \OC::$server->getAppConfig()->getValues(false, 'ocsid');
+            if(array_search($ocsID, $idArray)) {
+                return array_search($ocsID, $idArray);
+            }
+        }
+        return false;
+    }
+
+    public static function shouldUpgrade($app) {
+        $versions = self::getAppVersions();
+        $currentVersion = OC_App::getAppVersion($app);
+        if ($currentVersion && isset($versions[$app])) {
+            $installedVersion = $versions[$app];
+            if (!version_compare($currentVersion, $installedVersion, '=')) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Adjust the number of version parts of $version1 to match
+     * the number of version parts of $version2.
+     *
+     * @param string $version1 version to adjust
+     * @param string $version2 version to take the number of parts from
+     * @return string shortened $version1
+     */
+    private static function adjustVersionParts($version1, $version2) {
+        $version1 = explode('.', $version1);
+        $version2 = explode('.', $version2);
+        // reduce $version1 to match the number of parts in $version2
+        while (count($version1) > count($version2)) {
+            array_pop($version1);
+        }
+        // if $version1 does not have enough parts, add some
+        while (count($version1) < count($version2)) {
+            $version1[] = '0';
+        }
+        return implode('.', $version1);
+    }
+
+    /**
+     * Check whether the current ownCloud version matches the given
+     * application's version requirements.
+     *
+     * The comparison is made based on the number of parts that the
+     * app info version has. For example for ownCloud 6.0.3 if the
+     * app info version is expecting version 6.0, the comparison is
+     * made on the first two parts of the ownCloud version.
+     * This means that it's possible to specify "requiremin" => 6
+     * and "requiremax" => 6 and it will still match ownCloud 6.0.3.
+     *
+     * @param string $ocVersion ownCloud version to check against
+     * @param array $appInfo app info (from xml)
+     *
+     * @return boolean true if compatible, otherwise false
+     */
+    public static function isAppCompatible($ocVersion, $appInfo) {
+        $requireMin = '';
+        $requireMax = '';
+        if (isset($appInfo['dependencies']['nextcloud']['@attributes']['min-version'])) {
+            $requireMin = $appInfo['dependencies']['nextcloud']['@attributes']['min-version'];
+        } elseif (isset($appInfo['dependencies']['owncloud']['@attributes']['min-version'])) {
+            $requireMin = $appInfo['dependencies']['owncloud']['@attributes']['min-version'];
+        } else if (isset($appInfo['requiremin'])) {
+            $requireMin = $appInfo['requiremin'];
+        } else if (isset($appInfo['require'])) {
+            $requireMin = $appInfo['require'];
+        }
+
+        if (isset($appInfo['dependencies']['nextcloud']['@attributes']['max-version'])) {
+            $requireMax = $appInfo['dependencies']['nextcloud']['@attributes']['max-version'];
+        } elseif (isset($appInfo['dependencies']['owncloud']['@attributes']['max-version'])) {
+            $requireMax = $appInfo['dependencies']['owncloud']['@attributes']['max-version'];
+        } else if (isset($appInfo['requiremax'])) {
+            $requireMax = $appInfo['requiremax'];
+        }
+
+        if (is_array($ocVersion)) {
+            $ocVersion = implode('.', $ocVersion);
+        }
+
+        if (!empty($requireMin)
+            && version_compare(self::adjustVersionParts($ocVersion, $requireMin), $requireMin, '<')
+        ) {
+
+            return false;
+        }
+
+        if (!empty($requireMax)
+            && version_compare(self::adjustVersionParts($ocVersion, $requireMax), $requireMax, '>')
+        ) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * get the installed version of all apps
+     */
+    public static function getAppVersions() {
+        static $versions;
+
+        if(!$versions) {
+            $appConfig = \OC::$server->getAppConfig();
+            $versions = $appConfig->getValues(false, 'installed_version');
+        }
+        return $versions;
+    }
+
+    /**
+     * @param string $app
+     * @param \OCP\IConfig $config
+     * @param \OCP\IL10N $l
+     * @return bool
+     *
+     * @throws Exception if app is not compatible with this version of ownCloud
+     * @throws Exception if no app-name was specified
+     */
+    public function installApp($app,
+                                \OCP\IConfig $config,
+                                \OCP\IL10N $l) {
+        if ($app !== false) {
+            // check if the app is compatible with this version of ownCloud
+            $info = self::getAppInfo($app);
+            if(!is_array($info)) {
+                throw new \Exception(
+                    $l->t('App "%s" cannot be installed because appinfo file cannot be read.',
+                        [$info['name']]
+                    )
+                );
+            }
+
+            $version = \OCP\Util::getVersion();
+            if (!self::isAppCompatible($version, $info)) {
+                throw new \Exception(
+                    $l->t('App "%s" cannot be installed because it is not compatible with this version of the server.',
+                        array($info['name'])
+                    )
+                );
+            }
+
+            // check for required dependencies
+            self::checkAppDependencies($config, $l, $info);
+
+            $config->setAppValue($app, 'enabled', 'yes');
+            if (isset($appData['id'])) {
+                $config->setAppValue($app, 'ocsid', $appData['id']);
+            }
+
+            if(isset($info['settings']) && is_array($info['settings'])) {
+                $appPath = self::getAppPath($app);
+                self::registerAutoloading($app, $appPath);
+                \OC::$server->getSettingsManager()->setupSettings($info['settings']);
+            }
+
+            \OC_Hook::emit('OC_App', 'post_enable', array('app' => $app));
+        } else {
+            if(empty($appName) ) {
+                throw new \Exception($l->t("No app name specified"));
+            } else {
+                throw new \Exception($l->t("App '%s' could not be installed!", $appName));
+            }
+        }
+
+        return $app;
+    }
+
+    /**
+     * update the database for the app and call the update script
+     *
+     * @param string $appId
+     * @return bool
+     */
+    public static function updateApp($appId) {
+        $appPath = self::getAppPath($appId);
+        if($appPath === false) {
+            return false;
+        }
+        $appData = self::getAppInfo($appId);
+        self::executeRepairSteps($appId, $appData['repair-steps']['pre-migration']);
+        if (file_exists($appPath . '/appinfo/database.xml')) {
+            OC_DB::updateDbFromStructure($appPath . '/appinfo/database.xml');
+        }
+        self::executeRepairSteps($appId, $appData['repair-steps']['post-migration']);
+        self::setupLiveMigrations($appId, $appData['repair-steps']['live-migration']);
+        unset(self::$appVersion[$appId]);
+        // run upgrade code
+        if (file_exists($appPath . '/appinfo/update.php')) {
+            self::loadApp($appId);
+            include $appPath . '/appinfo/update.php';
+        }
+        self::setupBackgroundJobs($appData['background-jobs']);
+        if(isset($appData['settings']) && is_array($appData['settings'])) {
+            $appPath = self::getAppPath($appId);
+            self::registerAutoloading($appId, $appPath);
+            \OC::$server->getSettingsManager()->setupSettings($appData['settings']);
+        }
+
+        //set remote/public handlers
+        if (array_key_exists('ocsid', $appData)) {
+            \OC::$server->getConfig()->setAppValue($appId, 'ocsid', $appData['ocsid']);
+        } elseif(\OC::$server->getConfig()->getAppValue($appId, 'ocsid', null) !== null) {
+            \OC::$server->getConfig()->deleteAppValue($appId, 'ocsid');
+        }
+        foreach ($appData['remote'] as $name => $path) {
+            \OC::$server->getConfig()->setAppValue('core', 'remote_' . $name, $appId . '/' . $path);
+        }
+        foreach ($appData['public'] as $name => $path) {
+            \OC::$server->getConfig()->setAppValue('core', 'public_' . $name, $appId . '/' . $path);
+        }
+
+        self::setAppTypes($appId);
+
+        $version = \OC_App::getAppVersion($appId);
+        \OC::$server->getAppConfig()->setValue($appId, 'installed_version', $version);
+
+        \OC::$server->getEventDispatcher()->dispatch(ManagerEvent::EVENT_APP_UPDATE, new ManagerEvent(
+            ManagerEvent::EVENT_APP_UPDATE, $appId
+        ));
+
+        return true;
+    }
+
+    /**
+     * @param string $appId
+     * @param string[] $steps
+     * @throws \OC\NeedsUpdateException
+     */
+    public static function executeRepairSteps($appId, array $steps) {
+        if (empty($steps)) {
+            return;
+        }
+        // load the app
+        self::loadApp($appId);
+
+        $dispatcher = OC::$server->getEventDispatcher();
+
+        // load the steps
+        $r = new Repair([], $dispatcher);
+        foreach ($steps as $step) {
+            try {
+                $r->addStep($step);
+            } catch (Exception $ex) {
+                $r->emit('\OC\Repair', 'error', [$ex->getMessage()]);
+                \OC::$server->getLogger()->logException($ex);
+            }
+        }
+        // run the steps
+        $r->run();
+    }
+
+    public static function setupBackgroundJobs(array $jobs) {
+        $queue = \OC::$server->getJobList();
+        foreach ($jobs as $job) {
+            $queue->add($job);
+        }
+    }
+
+    /**
+     * @param string $appId
+     * @param string[] $steps
+     */
+    private static function setupLiveMigrations($appId, array $steps) {
+        $queue = \OC::$server->getJobList();
+        foreach ($steps as $step) {
+            $queue->add('OC\Migration\BackgroundRepair', [
+                'app' => $appId,
+                'step' => $step]);
+        }
+    }
+
+    /**
+     * @param string $appId
+     * @return \OC\Files\View|false
+     */
+    public static function getStorage($appId) {
+        if (OC_App::isEnabled($appId)) { //sanity check
+            if (\OC::$server->getUserSession()->isLoggedIn()) {
+                $view = new \OC\Files\View('/' . OC_User::getUser());
+                if (!$view->file_exists($appId)) {
+                    $view->mkdir($appId);
+                }
+                return new \OC\Files\View('/' . OC_User::getUser() . '/' . $appId);
+            } else {
+                \OCP\Util::writeLog('core', 'Can\'t get app storage, app ' . $appId . ', user not logged in', \OCP\Util::ERROR);
+                return false;
+            }
+        } else {
+            \OCP\Util::writeLog('core', 'Can\'t get app storage, app ' . $appId . ' not enabled', \OCP\Util::ERROR);
+            return false;
+        }
+    }
+
+    protected static function findBestL10NOption($options, $lang) {
+        $fallback = $similarLangFallback = $englishFallback = false;
+
+        $lang = strtolower($lang);
+        $similarLang = $lang;
+        if (strpos($similarLang, '_')) {
+            // For "de_DE" we want to find "de" and the other way around
+            $similarLang = substr($lang, 0, strpos($lang, '_'));
+        }
+
+        foreach ($options as $option) {
+            if (is_array($option)) {
+                if ($fallback === false) {
+                    $fallback = $option['@value'];
+                }
+
+                if (!isset($option['@attributes']['lang'])) {
+                    continue;
+                }
+
+                $attributeLang = strtolower($option['@attributes']['lang']);
+                if ($attributeLang === $lang) {
+                    return $option['@value'];
+                }
+
+                if ($attributeLang === $similarLang) {
+                    $similarLangFallback = $option['@value'];
+                } else if (strpos($attributeLang, $similarLang . '_') === 0) {
+                    if ($similarLangFallback === false) {
+                        $similarLangFallback =  $option['@value'];
+                    }
+                }
+            } else {
+                $englishFallback = $option;
+            }
+        }
+
+        if ($similarLangFallback !== false) {
+            return $similarLangFallback;
+        } else if ($englishFallback !== false) {
+            return $englishFallback;
+        }
+        return (string) $fallback;
+    }
+
+    /**
+     * parses the app data array and enhanced the 'description' value
+     *
+     * @param array $data the app data
+     * @param string $lang
+     * @return array improved app data
+     */
+    public static function parseAppInfo(array $data, $lang = null) {
+
+        if ($lang && isset($data['name']) && is_array($data['name'])) {
+            $data['name'] = self::findBestL10NOption($data['name'], $lang);
+        }
+        if ($lang && isset($data['summary']) && is_array($data['summary'])) {
+            $data['summary'] = self::findBestL10NOption($data['summary'], $lang);
+        }
+        if ($lang && isset($data['description']) && is_array($data['description'])) {
+            $data['description'] = trim(self::findBestL10NOption($data['description'], $lang));
+        } else if (isset($data['description']) && is_string($data['description'])) {
+            $data['description'] = trim($data['description']);
+        } else  {
+            $data['description'] = '';
+        }
+
+        return $data;
+    }
+
+    /**
+     * @param \OCP\IConfig $config
+     * @param \OCP\IL10N $l
+     * @param array $info
+     * @throws \Exception
+     */
+    protected static function checkAppDependencies($config, $l, $info) {
+        $dependencyAnalyzer = new DependencyAnalyzer(new Platform($config), $l);
+        $missing = $dependencyAnalyzer->analyze($info);
+        if (!empty($missing)) {
+            $missingMsg = join(PHP_EOL, $missing);
+            throw new \Exception(
+                $l->t('App "%s" cannot be installed because the following dependencies are not fulfilled: %s',
+                    [$info['name'], $missingMsg]
+                )
+            );
+        }
+    }
 }

Spacing +68 added lines, -68 removed lines

@@ -111,9 +111,9 @@ 
 		$apps = self::getEnabledApps();
 
 		// Add each apps' folder as allowed class path
-		foreach($apps as $app) {
+		foreach ($apps as $app) {
 			$path = self::getAppPath($app);
-			if($path !== false) {
+			if ($path !== false) {
 				self::registerAutoloading($app, $path);
 			}
 		}
@@ -138,15 +138,15 @@ 
 	public static function loadApp($app) {
 		self::$loadedApps[] = $app;
 		$appPath = self::getAppPath($app);
-		if($appPath === false) {
+		if ($appPath === false) {
 			return;
 		}
 
 		// in case someone calls loadApp() directly
 		self::registerAutoloading($app, $appPath);
 
-		if (is_file($appPath . '/appinfo/app.php')) {
-			\OC::$server->getEventLogger()->start('load_app_' . $app, 'Load app: ' . $app);
+		if (is_file($appPath.'/appinfo/app.php')) {
+			\OC::$server->getEventLogger()->start('load_app_'.$app, 'Load app: '.$app);
 			self::requireAppFile($app);
 			if (self::isType($app, array('authentication'))) {
 				// since authentication apps affect the "is app enabled for group" check,
@@ -155,7 +155,7 @@ 
 				// enabled for groups
 				self::$enabledAppsCache = array();
 			}
-			\OC::$server->getEventLogger()->end('load_app_' . $app);
+			\OC::$server->getEventLogger()->end('load_app_'.$app);
 		}
 
 		$info = self::getAppInfo($app);
@@ -182,17 +182,17 @@ 
 	 * @param string $path
 	 */
 	public static function registerAutoloading($app, $path) {
-		$key = $app . '-' . $path;
-		if(isset(self::$alreadyRegistered[$key])) {
+		$key = $app.'-'.$path;
+		if (isset(self::$alreadyRegistered[$key])) {
 			return;
 		}
 		self::$alreadyRegistered[$key] = true;
 		// Register on PSR-4 composer autoloader
 		$appNamespace = \OC\AppFramework\App::buildAppNamespace($app);
 		\OC::$server->registerNamespace($app, $appNamespace);
-		\OC::$composerAutoloader->addPsr4($appNamespace . '\\', $path . '/lib/', true);
+		\OC::$composerAutoloader->addPsr4($appNamespace.'\\', $path.'/lib/', true);
 		if (defined('PHPUNIT_RUN') || defined('CLI_TEST_RUN')) {
-			\OC::$composerAutoloader->addPsr4($appNamespace . '\\Tests\\', $path . '/tests/', true);
+			\OC::$composerAutoloader->addPsr4($appNamespace.'\\Tests\\', $path.'/tests/', true);
 		}
 
 		// Register on legacy autoloader
@@ -207,7 +207,7 @@ 
 	private static function requireAppFile($app) {
 		try {
 			// encapsulated here to avoid variable scope conflicts
-			require_once $app . '/appinfo/app.php';
+			require_once $app.'/appinfo/app.php';
 		} catch (Error $ex) {
 			\OC::$server->getLogger()->logException($ex);
 			$blacklist = \OC::$server->getAppManager()->getAlwaysEnabledApps();
@@ -261,7 +261,7 @@ 
 	 */
 	public static function setAppTypes($app) {
 		$appData = self::getAppInfo($app);
-		if(!is_array($appData)) {
+		if (!is_array($appData)) {
 			return;
 		}
 
@@ -325,8 +325,8 @@ 
 		} else {
 			$apps = $appManager->getEnabledAppsForUser($user);
 		}
-		$apps = array_filter($apps, function ($app) {
-			return $app !== 'files';//we add this manually
+		$apps = array_filter($apps, function($app) {
+			return $app !== 'files'; //we add this manually
 		});
 		sort($apps);
 		array_unshift($apps, 'files');
@@ -370,7 +370,7 @@ 
 		);
 		$isDownloaded = $installer->isDownloaded($appId);
 
-		if(!$isDownloaded) {
+		if (!$isDownloaded) {
 			$installer->downloadApp($appId);
 		}
 
@@ -408,7 +408,7 @@ 
 		}
 
 		$info = self::getAppInfo($appId);
-		if(isset($info['settings']) && is_array($info['settings'])) {
+		if (isset($info['settings']) && is_array($info['settings'])) {
 			$appPath = self::getAppPath($appId);
 			self::registerAutoloading($appId, $appPath);
 			\OC::$server->getSettingsManager()->setupSettings($info['settings']);
@@ -497,7 +497,7 @@ 
 			//SubAdmins are also allowed to access user management
 			$userObject = \OC::$server->getUserSession()->getUser();
 			$isSubAdmin = false;
-			if($userObject !== null) {
+			if ($userObject !== null) {
 				$isSubAdmin = \OC::$server->getGroupManager()->getSubAdmin()->isSubAdmin($userObject);
 			}
 			if ($isSubAdmin) {
@@ -531,7 +531,7 @@ 
 	// This is private as well. It simply works, so don't ask for more details
 	private static function proceedNavigation($list) {
 		$headerIconCount = 8;
-		if(OC_User::isAdminUser(OC_User::getUser())) {
+		if (OC_User::isAdminUser(OC_User::getUser())) {
 			$headerIconCount--;
 		}
 		usort($list, function($a, $b) {
@@ -556,16 +556,16 @@ 
 		}
 		unset($navEntry);
 
-		if($activeAppIndex > ($headerIconCount-1)) {
+		if ($activeAppIndex > ($headerIconCount - 1)) {
 			$active = $list[$activeAppIndex];
-			$lastInHeader = $list[$headerIconCount-1];
-			$list[$headerIconCount-1] = $active;
+			$lastInHeader = $list[$headerIconCount - 1];
+			$list[$headerIconCount - 1] = $active;
 			$list[$activeAppIndex] = $lastInHeader;
 		}
 
 		foreach ($list as $index => &$navEntry) {
 			$navEntry['showInHeader'] = false;
-			if($index < $headerIconCount) {
+			if ($index < $headerIconCount) {
 				$navEntry['showInHeader'] = true;
 			}
 		}
@@ -577,7 +577,7 @@ 
 
 	public static function proceedAppNavigation($entries) {
 		$headerIconCount = 8;
-		if(OC_User::isAdminUser(OC_User::getUser())) {
+		if (OC_User::isAdminUser(OC_User::getUser())) {
 			$headerIconCount--;
 		}
 		$activeAppIndex = -1;
@@ -593,10 +593,10 @@ 
 			}
 		}
 		// move active item to last position
-		if($activeAppIndex > ($headerIconCount-1)) {
+		if ($activeAppIndex > ($headerIconCount - 1)) {
 			$active = $list[$activeAppIndex];
-			$lastInHeader = $list[$headerIconCount-1];
-			$list[$headerIconCount-1] = $active;
+			$lastInHeader = $list[$headerIconCount - 1];
+			$list[$headerIconCount - 1] = $active;
 			$list[$activeAppIndex] = $lastInHeader;
 		}
 		$list = array_slice($list, 0, $headerIconCount);
@@ -633,7 +633,7 @@ 
 	 */
 	public static function findAppInDirectories($appId) {
 		$sanitizedAppId = self::cleanAppId($appId);
-		if($sanitizedAppId !== $appId) {
+		if ($sanitizedAppId !== $appId) {
 			return false;
 		}
 		static $app_dir = array();
@@ -644,7 +644,7 @@ 
 
 		$possibleApps = array();
 		foreach (OC::$APPSROOTS as $dir) {
-			if (file_exists($dir['path'] . '/' . $appId)) {
+			if (file_exists($dir['path'].'/'.$appId)) {
 				$possibleApps[] = $dir;
 			}
 		}
@@ -685,7 +685,7 @@ 
 		}
 
 		if (($dir = self::findAppInDirectories($appId)) != false) {
-			return $dir['path'] . '/' . $appId;
+			return $dir['path'].'/'.$appId;
 		}
 		return false;
 	}
@@ -699,7 +699,7 @@ 
 	 */
 	public static function getAppWebPath($appId) {
 		if (($dir = self::findAppInDirectories($appId)) != false) {
-			return OC::$WEBROOT . $dir['url'] . '/' . $appId;
+			return OC::$WEBROOT.$dir['url'].'/'.$appId;
 		}
 		return false;
 	}
@@ -712,7 +712,7 @@ 
 	 * @return string
 	 */
 	public static function getAppVersion($appId, $useCache = true) {
-		if($useCache && isset(self::$appVersion[$appId])) {
+		if ($useCache && isset(self::$appVersion[$appId])) {
 			return self::$appVersion[$appId];
 		}
 
@@ -728,7 +728,7 @@ 
 	 * @return string
 	 */
 	public static function getAppVersionByPath($path) {
-		$infoFile = $path . '/appinfo/info.xml';
+		$infoFile = $path.'/appinfo/info.xml';
 		$appData = self::getAppInfo($infoFile, true);
 		return isset($appData['version']) ? $appData['version'] : '';
 	}
@@ -751,10 +751,10 @@ 
 				return self::$appInfo[$appId];
 			}
 			$appPath = self::getAppPath($appId);
-			if($appPath === false) {
+			if ($appPath === false) {
 				return null;
 			}
-			$file = $appPath . '/appinfo/info.xml';
+			$file = $appPath.'/appinfo/info.xml';
 		}
 
 		$parser = new InfoParser(\OC::$server->getMemCacheFactory()->create('core.appinfo'));
@@ -763,9 +763,9 @@ 
 		if (is_array($data)) {
 			$data = OC_App::parseAppInfo($data, $lang);
 		}
-		if(isset($data['ocsid'])) {
+		if (isset($data['ocsid'])) {
 			$storedId = \OC::$server->getConfig()->getAppValue($appId, 'ocsid');
-			if($storedId !== '' && $storedId !== $data['ocsid']) {
+			if ($storedId !== '' && $storedId !== $data['ocsid']) {
 				$data['ocsid'] = $storedId;
 			}
 		}
@@ -861,7 +861,7 @@ 
 	 * @param string $page
 	 */
 	public static function registerAdmin($app, $page) {
-		self::$adminForms[] = $app . '/' . $page . '.php';
+		self::$adminForms[] = $app.'/'.$page.'.php';
 	}
 
 	/**
@@ -870,7 +870,7 @@ 
 	 * @param string $page
 	 */
 	public static function registerPersonal($app, $page) {
-		self::$personalForms[] = $app . '/' . $page . '.php';
+		self::$personalForms[] = $app.'/'.$page.'.php';
 	}
 
 	/**
@@ -899,7 +899,7 @@ 
 
 		foreach (OC::$APPSROOTS as $apps_dir) {
 			if (!is_readable($apps_dir['path'])) {
-				\OCP\Util::writeLog('core', 'unable to read app folder : ' . $apps_dir['path'], \OCP\Util::WARN);
+				\OCP\Util::writeLog('core', 'unable to read app folder : '.$apps_dir['path'], \OCP\Util::WARN);
 				continue;
 			}
 			$dh = opendir($apps_dir['path']);
@@ -907,7 +907,7 @@ 
 			if (is_resource($dh)) {
 				while (($file = readdir($dh)) !== false) {
 
-					if ($file[0] != '.' and is_dir($apps_dir['path'] . '/' . $file) and is_file($apps_dir['path'] . '/' . $file . '/appinfo/info.xml')) {
+					if ($file[0] != '.' and is_dir($apps_dir['path'].'/'.$file) and is_file($apps_dir['path'].'/'.$file.'/appinfo/info.xml')) {
 
 						$apps[] = $file;
 					}
@@ -937,12 +937,12 @@ 
 
 				$info = OC_App::getAppInfo($app, false, $langCode);
 				if (!is_array($info)) {
-					\OCP\Util::writeLog('core', 'Could not read app info file for app "' . $app . '"', \OCP\Util::ERROR);
+					\OCP\Util::writeLog('core', 'Could not read app info file for app "'.$app.'"', \OCP\Util::ERROR);
 					continue;
 				}
 
 				if (!isset($info['name'])) {
-					\OCP\Util::writeLog('core', 'App id "' . $app . '" has no name in appinfo', \OCP\Util::ERROR);
+					\OCP\Util::writeLog('core', 'App id "'.$app.'" has no name in appinfo', \OCP\Util::ERROR);
 					continue;
 				}
 
@@ -969,13 +969,13 @@ 
 				}
 
 				$appPath = self::getAppPath($app);
-				if($appPath !== false) {
-					$appIcon = $appPath . '/img/' . $app . '.svg';
+				if ($appPath !== false) {
+					$appIcon = $appPath.'/img/'.$app.'.svg';
 					if (file_exists($appIcon)) {
-						$info['preview'] = \OC::$server->getURLGenerator()->imagePath($app, $app . '.svg');
+						$info['preview'] = \OC::$server->getURLGenerator()->imagePath($app, $app.'.svg');
 						$info['previewAsIcon'] = true;
 					} else {
-						$appIcon = $appPath . '/img/app.svg';
+						$appIcon = $appPath.'/img/app.svg';
 						if (file_exists($appIcon)) {
 							$info['preview'] = \OC::$server->getURLGenerator()->imagePath($app, 'app.svg');
 							$info['previewAsIcon'] = true;
@@ -1009,9 +1009,9 @@ 
 	 * @return string|false
 	 */
 	public static function getInternalAppIdByOcs($ocsID) {
-		if(is_numeric($ocsID)) {
+		if (is_numeric($ocsID)) {
 			$idArray = \OC::$server->getAppConfig()->getValues(false, 'ocsid');
-			if(array_search($ocsID, $idArray)) {
+			if (array_search($ocsID, $idArray)) {
 				return array_search($ocsID, $idArray);
 			}
 		}
@@ -1115,7 +1115,7 @@ 
 	public static function getAppVersions() {
 		static $versions;
 
-		if(!$versions) {
+		if (!$versions) {
 			$appConfig = \OC::$server->getAppConfig();
 			$versions = $appConfig->getValues(false, 'installed_version');
 		}
@@ -1137,7 +1137,7 @@ 
 		if ($app !== false) {
 			// check if the app is compatible with this version of ownCloud
 			$info = self::getAppInfo($app);
-			if(!is_array($info)) {
+			if (!is_array($info)) {
 				throw new \Exception(
 					$l->t('App "%s" cannot be installed because appinfo file cannot be read.',
 						[$info['name']]
@@ -1162,7 +1162,7 @@ 
 				$config->setAppValue($app, 'ocsid', $appData['id']);
 			}
 
-			if(isset($info['settings']) && is_array($info['settings'])) {
+			if (isset($info['settings']) && is_array($info['settings'])) {
 				$appPath = self::getAppPath($app);
 				self::registerAutoloading($app, $appPath);
 				\OC::$server->getSettingsManager()->setupSettings($info['settings']);
@@ -1170,7 +1170,7 @@ 
 
 			\OC_Hook::emit('OC_App', 'post_enable', array('app' => $app));
 		} else {
-			if(empty($appName) ) {
+			if (empty($appName)) {
 				throw new \Exception($l->t("No app name specified"));
 			} else {
 				throw new \Exception($l->t("App '%s' could not be installed!", $appName));
@@ -1188,24 +1188,24 @@ 
 	 */
 	public static function updateApp($appId) {
 		$appPath = self::getAppPath($appId);
-		if($appPath === false) {
+		if ($appPath === false) {
 			return false;
 		}
 		$appData = self::getAppInfo($appId);
 		self::executeRepairSteps($appId, $appData['repair-steps']['pre-migration']);
-		if (file_exists($appPath . '/appinfo/database.xml')) {
-			OC_DB::updateDbFromStructure($appPath . '/appinfo/database.xml');
+		if (file_exists($appPath.'/appinfo/database.xml')) {
+			OC_DB::updateDbFromStructure($appPath.'/appinfo/database.xml');
 		}
 		self::executeRepairSteps($appId, $appData['repair-steps']['post-migration']);
 		self::setupLiveMigrations($appId, $appData['repair-steps']['live-migration']);
 		unset(self::$appVersion[$appId]);
 		// run upgrade code
-		if (file_exists($appPath . '/appinfo/update.php')) {
+		if (file_exists($appPath.'/appinfo/update.php')) {
 			self::loadApp($appId);
-			include $appPath . '/appinfo/update.php';
+			include $appPath.'/appinfo/update.php';
 		}
 		self::setupBackgroundJobs($appData['background-jobs']);
-		if(isset($appData['settings']) && is_array($appData['settings'])) {
+		if (isset($appData['settings']) && is_array($appData['settings'])) {
 			$appPath = self::getAppPath($appId);
 			self::registerAutoloading($appId, $appPath);
 			\OC::$server->getSettingsManager()->setupSettings($appData['settings']);
@@ -1214,14 +1214,14 @@ 
 		//set remote/public handlers
 		if (array_key_exists('ocsid', $appData)) {
 			\OC::$server->getConfig()->setAppValue($appId, 'ocsid', $appData['ocsid']);
-		} elseif(\OC::$server->getConfig()->getAppValue($appId, 'ocsid', null) !== null) {
+		} elseif (\OC::$server->getConfig()->getAppValue($appId, 'ocsid', null) !== null) {
 			\OC::$server->getConfig()->deleteAppValue($appId, 'ocsid');
 		}
 		foreach ($appData['remote'] as $name => $path) {
-			\OC::$server->getConfig()->setAppValue('core', 'remote_' . $name, $appId . '/' . $path);
+			\OC::$server->getConfig()->setAppValue('core', 'remote_'.$name, $appId.'/'.$path);
 		}
 		foreach ($appData['public'] as $name => $path) {
-			\OC::$server->getConfig()->setAppValue('core', 'public_' . $name, $appId . '/' . $path);
+			\OC::$server->getConfig()->setAppValue('core', 'public_'.$name, $appId.'/'.$path);
 		}
 
 		self::setAppTypes($appId);
@@ -1291,17 +1291,17 @@ 
 	public static function getStorage($appId) {
 		if (OC_App::isEnabled($appId)) { //sanity check
 			if (\OC::$server->getUserSession()->isLoggedIn()) {
-				$view = new \OC\Files\View('/' . OC_User::getUser());
+				$view = new \OC\Files\View('/'.OC_User::getUser());
 				if (!$view->file_exists($appId)) {
 					$view->mkdir($appId);
 				}
-				return new \OC\Files\View('/' . OC_User::getUser() . '/' . $appId);
+				return new \OC\Files\View('/'.OC_User::getUser().'/'.$appId);
 			} else {
-				\OCP\Util::writeLog('core', 'Can\'t get app storage, app ' . $appId . ', user not logged in', \OCP\Util::ERROR);
+				\OCP\Util::writeLog('core', 'Can\'t get app storage, app '.$appId.', user not logged in', \OCP\Util::ERROR);
 				return false;
 			}
 		} else {
-			\OCP\Util::writeLog('core', 'Can\'t get app storage, app ' . $appId . ' not enabled', \OCP\Util::ERROR);
+			\OCP\Util::writeLog('core', 'Can\'t get app storage, app '.$appId.' not enabled', \OCP\Util::ERROR);
 			return false;
 		}
 	}
@@ -1333,9 +1333,9 @@ 
 
 				if ($attributeLang === $similarLang) {
 					$similarLangFallback = $option['@value'];
-				} else if (strpos($attributeLang, $similarLang . '_') === 0) {
+				} else if (strpos($attributeLang, $similarLang.'_') === 0) {
 					if ($similarLangFallback === false) {
-						$similarLangFallback =  $option['@value'];
+						$similarLangFallback = $option['@value'];
 					}
 				}
 			} else {
@@ -1370,7 +1370,7 @@ 
 			$data['description'] = trim(self::findBestL10NOption($data['description'], $lang));
 		} else if (isset($data['description']) && is_string($data['description'])) {
 			$data['description'] = trim($data['description']);
-		} else  {
+		} else {
 			$data['description'] = '';
 		}
 

lib/private/L10N/Factory.php

Doc Comments +5 added lines

@@ -318,6 +318,11 @@
 	 */
 	// FIXME This method is only public, until OC_L10N does not need it anymore,
 	// FIXME This is also the reason, why it is not in the public interface
+
+	/**
+	 * @param string $app
+	 * @param string $lang
+	 */
 	public function getL10nFilesForApp($app, $lang) {
 		$languageFiles = [];
 

Indentation +387 added lines, -387 removed lines

@@ -40,391 +40,391 @@
  */
 class Factory implements IFactory {
 
-	/** @var string */
-	protected $requestLanguage = '';
-
-	/**
-	 * cached instances
-	 * @var array Structure: Lang => App => \OCP\IL10N
-	 */
-	protected $instances = [];
-
-	/**
-	 * @var array Structure: App => string[]
-	 */
-	protected $availableLanguages = [];
-
-	/**
-	 * @var array Structure: string => callable
-	 */
-	protected $pluralFunctions = [];
-
-	/** @var IConfig */
-	protected $config;
-
-	/** @var IRequest */
-	protected $request;
-
-	/** @var IUserSession */
-	protected $userSession;
-
-	/** @var string */
-	protected $serverRoot;
-
-	/**
-	 * @param IConfig $config
-	 * @param IRequest $request
-	 * @param IUserSession $userSession
-	 * @param string $serverRoot
-	 */
-	public function __construct(IConfig $config,
-								IRequest $request,
-								IUserSession $userSession,
-								$serverRoot) {
-		$this->config = $config;
-		$this->request = $request;
-		$this->userSession = $userSession;
-		$this->serverRoot = $serverRoot;
-	}
-
-	/**
-	 * Get a language instance
-	 *
-	 * @param string $app
-	 * @param string|null $lang
-	 * @return \OCP\IL10N
-	 */
-	public function get($app, $lang = null) {
-		$app = \OC_App::cleanAppId($app);
-		if ($lang !== null) {
-			$lang = str_replace(array('\0', '/', '\\', '..'), '', (string) $lang);
-		}
-		if ($lang === null || !$this->languageExists($app, $lang)) {
-			$lang = $this->findLanguage($app);
-		}
-
-		if (!isset($this->instances[$lang][$app])) {
-			$this->instances[$lang][$app] = new L10N(
-				$this, $app, $lang,
-				$this->getL10nFilesForApp($app, $lang)
-			);
-		}
-
-		return $this->instances[$lang][$app];
-	}
-
-	/**
-	 * Find the best language
-	 *
-	 * @param string|null $app App id or null for core
-	 * @return string language If nothing works it returns 'en'
-	 */
-	public function findLanguage($app = null) {
-		if ($this->requestLanguage !== '' && $this->languageExists($app, $this->requestLanguage)) {
-			return $this->requestLanguage;
-		}
-
-		/**
-		 * At this point ownCloud might not yet be installed and thus the lookup
-		 * in the preferences table might fail. For this reason we need to check
-		 * whether the instance has already been installed
-		 *
-		 * @link https://github.com/owncloud/core/issues/21955
-		 */
-		if($this->config->getSystemValue('installed', false)) {
-			$userId = !is_null($this->userSession->getUser()) ? $this->userSession->getUser()->getUID() :  null;
-			if(!is_null($userId)) {
-				$userLang = $this->config->getUserValue($userId, 'core', 'lang', null);
-			} else {
-				$userLang = null;
-			}
-		} else {
-			$userId = null;
-			$userLang = null;
-		}
-
-		if ($userLang) {
-			$this->requestLanguage = $userLang;
-			if ($this->languageExists($app, $userLang)) {
-				return $userLang;
-			}
-		}
-
-		try {
-			// Try to get the language from the Request
-			$lang = $this->getLanguageFromRequest($app);
-			if ($userId !== null && $app === null && !$userLang) {
-				$this->config->setUserValue($userId, 'core', 'lang', $lang);
-			}
-			return $lang;
-		} catch (LanguageNotFoundException $e) {
-			// Finding language from request failed fall back to default language
-			$defaultLanguage = $this->config->getSystemValue('default_language', false);
-			if ($defaultLanguage !== false && $this->languageExists($app, $defaultLanguage)) {
-				return $defaultLanguage;
-			}
-		}
-
-		// We could not find any language so fall back to english
-		return 'en';
-	}
-
-	/**
-	 * Find all available languages for an app
-	 *
-	 * @param string|null $app App id or null for core
-	 * @return array an array of available languages
-	 */
-	public function findAvailableLanguages($app = null) {
-		$key = $app;
-		if ($key === null) {
-			$key = 'null';
-		}
-
-		// also works with null as key
-		if (!empty($this->availableLanguages[$key])) {
-			return $this->availableLanguages[$key];
-		}
-
-		$available = ['en']; //english is always available
-		$dir = $this->findL10nDir($app);
-		if (is_dir($dir)) {
-			$files = scandir($dir);
-			if ($files !== false) {
-				foreach ($files as $file) {
-					if (substr($file, -5) === '.json' && substr($file, 0, 4) !== 'l10n') {
-						$available[] = substr($file, 0, -5);
-					}
-				}
-			}
-		}
-
-		// merge with translations from theme
-		$theme = $this->config->getSystemValue('theme');
-		if (!empty($theme)) {
-			$themeDir = $this->serverRoot . '/themes/' . $theme . substr($dir, strlen($this->serverRoot));
-
-			if (is_dir($themeDir)) {
-				$files = scandir($themeDir);
-				if ($files !== false) {
-					foreach ($files as $file) {
-						if (substr($file, -5) === '.json' && substr($file, 0, 4) !== 'l10n') {
-							$available[] = substr($file, 0, -5);
-						}
-					}
-				}
-			}
-		}
-
-		$this->availableLanguages[$key] = $available;
-		return $available;
-	}
-
-	/**
-	 * @param string|null $app App id or null for core
-	 * @param string $lang
-	 * @return bool
-	 */
-	public function languageExists($app, $lang) {
-		if ($lang === 'en') {//english is always available
-			return true;
-		}
-
-		$languages = $this->findAvailableLanguages($app);
-		return array_search($lang, $languages) !== false;
-	}
-
-	/**
-	 * @param string|null $app
-	 * @return string
-	 * @throws LanguageNotFoundException
-	 */
-	private function getLanguageFromRequest($app) {
-		$header = $this->request->getHeader('ACCEPT_LANGUAGE');
-		if ($header) {
-			$available = $this->findAvailableLanguages($app);
-
-			// E.g. make sure that 'de' is before 'de_DE'.
-			sort($available);
-
-			$preferences = preg_split('/,\s*/', strtolower($header));
-			foreach ($preferences as $preference) {
-				list($preferred_language) = explode(';', $preference);
-				$preferred_language = str_replace('-', '_', $preferred_language);
-
-				foreach ($available as $available_language) {
-					if ($preferred_language === strtolower($available_language)) {
-						return $available_language;
-					}
-				}
-
-				// Fallback from de_De to de
-				foreach ($available as $available_language) {
-					if (substr($preferred_language, 0, 2) === $available_language) {
-						return $available_language;
-					}
-				}
-			}
-		}
-
-		throw new LanguageNotFoundException();
-	}
-
-	/**
-	 * @param string|null $app App id or null for core
-	 * @return string
-	 */
-	public function setLanguageFromRequest($app = null) {
-
-		try {
-			$requestLanguage = $this->getLanguageFromRequest($app);
-		} catch (LanguageNotFoundException $e) {
-			$requestLanguage = 'en';
-		}
-
-		if ($app === null && !$this->requestLanguage) {
-			$this->requestLanguage = $requestLanguage;
-		}
-		return $requestLanguage;
-	}
-
-	/**
-	 * Checks if $sub is a subdirectory of $parent
-	 *
-	 * @param string $sub
-	 * @param string $parent
-	 * @return bool
-	 */
-	private function isSubDirectory($sub, $parent) {
-		// Check whether $sub contains no ".."
-		if(strpos($sub, '..') !== false) {
-			return false;
-		}
-
-		// Check whether $sub is a subdirectory of $parent
-		if (strpos($sub, $parent) === 0) {
-			return true;
-		}
-
-		return false;
-	}
-
-	/**
-	 * Get a list of language files that should be loaded
-	 *
-	 * @param string $app
-	 * @param string $lang
-	 * @return string[]
-	 */
-	// FIXME This method is only public, until OC_L10N does not need it anymore,
-	// FIXME This is also the reason, why it is not in the public interface
-	public function getL10nFilesForApp($app, $lang) {
-		$languageFiles = [];
-
-		$i18nDir = $this->findL10nDir($app);
-		$transFile = strip_tags($i18nDir) . strip_tags($lang) . '.json';
-
-		if (($this->isSubDirectory($transFile, $this->serverRoot . '/core/l10n/')
-				|| $this->isSubDirectory($transFile, $this->serverRoot . '/lib/l10n/')
-				|| $this->isSubDirectory($transFile, $this->serverRoot . '/settings/l10n/')
-				|| $this->isSubDirectory($transFile, \OC_App::getAppPath($app) . '/l10n/')
-			)
-			&& file_exists($transFile)) {
-			// load the translations file
-			$languageFiles[] = $transFile;
-		}
-
-		// merge with translations from theme
-		$theme = $this->config->getSystemValue('theme');
-		if (!empty($theme)) {
-			$transFile = $this->serverRoot . '/themes/' . $theme . substr($transFile, strlen($this->serverRoot));
-			if (file_exists($transFile)) {
-				$languageFiles[] = $transFile;
-			}
-		}
-
-		return $languageFiles;
-	}
-
-	/**
-	 * find the l10n directory
-	 *
-	 * @param string $app App id or empty string for core
-	 * @return string directory
-	 */
-	protected function findL10nDir($app = null) {
-		if (in_array($app, ['core', 'lib', 'settings'])) {
-			if (file_exists($this->serverRoot . '/' . $app . '/l10n/')) {
-				return $this->serverRoot . '/' . $app . '/l10n/';
-			}
-		} else if ($app && \OC_App::getAppPath($app) !== false) {
-			// Check if the app is in the app folder
-			return \OC_App::getAppPath($app) . '/l10n/';
-		}
-		return $this->serverRoot . '/core/l10n/';
-	}
-
-
-	/**
-	 * Creates a function from the plural string
-	 *
-	 * Parts of the code is copied from Habari:
-	 * https://github.com/habari/system/blob/master/classes/locale.php
-	 * @param string $string
-	 * @return string
-	 */
-	public function createPluralFunction($string) {
-		if (isset($this->pluralFunctions[$string])) {
-			return $this->pluralFunctions[$string];
-		}
-
-		if (preg_match( '/^\s*nplurals\s*=\s*(\d+)\s*;\s*plural=(.*)$/u', $string, $matches)) {
-			// sanitize
-			$nplurals = preg_replace( '/[^0-9]/', '', $matches[1] );
-			$plural = preg_replace( '#[^n0-9:\(\)\?\|\&=!<>+*/\%-]#', '', $matches[2] );
-
-			$body = str_replace(
-				array( 'plural', 'n', '$n$plurals', ),
-				array( '$plural', '$n', '$nplurals', ),
-				'nplurals='. $nplurals . '; plural=' . $plural
-			);
-
-			// add parents
-			// important since PHP's ternary evaluates from left to right
-			$body .= ';';
-			$res = '';
-			$p = 0;
-			for($i = 0; $i < strlen($body); $i++) {
-				$ch = $body[$i];
-				switch ( $ch ) {
-					case '?':
-						$res .= ' ? (';
-						$p++;
-						break;
-					case ':':
-						$res .= ') : (';
-						break;
-					case ';':
-						$res .= str_repeat( ')', $p ) . ';';
-						$p = 0;
-						break;
-					default:
-						$res .= $ch;
-				}
-			}
-
-			$body = $res . 'return ($plural>=$nplurals?$nplurals-1:$plural);';
-			$function = create_function('$n', $body);
-			$this->pluralFunctions[$string] = $function;
-			return $function;
-		} else {
-			// default: one plural form for all cases but n==1 (english)
-			$function = create_function(
-				'$n',
-				'$nplurals=2;$plural=($n==1?0:1);return ($plural>=$nplurals?$nplurals-1:$plural);'
-			);
-			$this->pluralFunctions[$string] = $function;
-			return $function;
-		}
-	}
+    /** @var string */
+    protected $requestLanguage = '';
+
+    /**
+     * cached instances
+     * @var array Structure: Lang => App => \OCP\IL10N
+     */
+    protected $instances = [];
+
+    /**
+     * @var array Structure: App => string[]
+     */
+    protected $availableLanguages = [];
+
+    /**
+     * @var array Structure: string => callable
+     */
+    protected $pluralFunctions = [];
+
+    /** @var IConfig */
+    protected $config;
+
+    /** @var IRequest */
+    protected $request;
+
+    /** @var IUserSession */
+    protected $userSession;
+
+    /** @var string */
+    protected $serverRoot;
+
+    /**
+     * @param IConfig $config
+     * @param IRequest $request
+     * @param IUserSession $userSession
+     * @param string $serverRoot
+     */
+    public function __construct(IConfig $config,
+                                IRequest $request,
+                                IUserSession $userSession,
+                                $serverRoot) {
+        $this->config = $config;
+        $this->request = $request;
+        $this->userSession = $userSession;
+        $this->serverRoot = $serverRoot;
+    }
+
+    /**
+     * Get a language instance
+     *
+     * @param string $app
+     * @param string|null $lang
+     * @return \OCP\IL10N
+     */
+    public function get($app, $lang = null) {
+        $app = \OC_App::cleanAppId($app);
+        if ($lang !== null) {
+            $lang = str_replace(array('\0', '/', '\\', '..'), '', (string) $lang);
+        }
+        if ($lang === null || !$this->languageExists($app, $lang)) {
+            $lang = $this->findLanguage($app);
+        }
+
+        if (!isset($this->instances[$lang][$app])) {
+            $this->instances[$lang][$app] = new L10N(
+                $this, $app, $lang,
+                $this->getL10nFilesForApp($app, $lang)
+            );
+        }
+
+        return $this->instances[$lang][$app];
+    }
+
+    /**
+     * Find the best language
+     *
+     * @param string|null $app App id or null for core
+     * @return string language If nothing works it returns 'en'
+     */
+    public function findLanguage($app = null) {
+        if ($this->requestLanguage !== '' && $this->languageExists($app, $this->requestLanguage)) {
+            return $this->requestLanguage;
+        }
+
+        /**
+         * At this point ownCloud might not yet be installed and thus the lookup
+         * in the preferences table might fail. For this reason we need to check
+         * whether the instance has already been installed
+         *
+         * @link https://github.com/owncloud/core/issues/21955
+         */
+        if($this->config->getSystemValue('installed', false)) {
+            $userId = !is_null($this->userSession->getUser()) ? $this->userSession->getUser()->getUID() :  null;
+            if(!is_null($userId)) {
+                $userLang = $this->config->getUserValue($userId, 'core', 'lang', null);
+            } else {
+                $userLang = null;
+            }
+        } else {
+            $userId = null;
+            $userLang = null;
+        }
+
+        if ($userLang) {
+            $this->requestLanguage = $userLang;
+            if ($this->languageExists($app, $userLang)) {
+                return $userLang;
+            }
+        }
+
+        try {
+            // Try to get the language from the Request
+            $lang = $this->getLanguageFromRequest($app);
+            if ($userId !== null && $app === null && !$userLang) {
+                $this->config->setUserValue($userId, 'core', 'lang', $lang);
+            }
+            return $lang;
+        } catch (LanguageNotFoundException $e) {
+            // Finding language from request failed fall back to default language
+            $defaultLanguage = $this->config->getSystemValue('default_language', false);
+            if ($defaultLanguage !== false && $this->languageExists($app, $defaultLanguage)) {
+                return $defaultLanguage;
+            }
+        }
+
+        // We could not find any language so fall back to english
+        return 'en';
+    }
+
+    /**
+     * Find all available languages for an app
+     *
+     * @param string|null $app App id or null for core
+     * @return array an array of available languages
+     */
+    public function findAvailableLanguages($app = null) {
+        $key = $app;
+        if ($key === null) {
+            $key = 'null';
+        }
+
+        // also works with null as key
+        if (!empty($this->availableLanguages[$key])) {
+            return $this->availableLanguages[$key];
+        }
+
+        $available = ['en']; //english is always available
+        $dir = $this->findL10nDir($app);
+        if (is_dir($dir)) {
+            $files = scandir($dir);
+            if ($files !== false) {
+                foreach ($files as $file) {
+                    if (substr($file, -5) === '.json' && substr($file, 0, 4) !== 'l10n') {
+                        $available[] = substr($file, 0, -5);
+                    }
+                }
+            }
+        }
+
+        // merge with translations from theme
+        $theme = $this->config->getSystemValue('theme');
+        if (!empty($theme)) {
+            $themeDir = $this->serverRoot . '/themes/' . $theme . substr($dir, strlen($this->serverRoot));
+
+            if (is_dir($themeDir)) {
+                $files = scandir($themeDir);
+                if ($files !== false) {
+                    foreach ($files as $file) {
+                        if (substr($file, -5) === '.json' && substr($file, 0, 4) !== 'l10n') {
+                            $available[] = substr($file, 0, -5);
+                        }
+                    }
+                }
+            }
+        }
+
+        $this->availableLanguages[$key] = $available;
+        return $available;
+    }
+
+    /**
+     * @param string|null $app App id or null for core
+     * @param string $lang
+     * @return bool
+     */
+    public function languageExists($app, $lang) {
+        if ($lang === 'en') {//english is always available
+            return true;
+        }
+
+        $languages = $this->findAvailableLanguages($app);
+        return array_search($lang, $languages) !== false;
+    }
+
+    /**
+     * @param string|null $app
+     * @return string
+     * @throws LanguageNotFoundException
+     */
+    private function getLanguageFromRequest($app) {
+        $header = $this->request->getHeader('ACCEPT_LANGUAGE');
+        if ($header) {
+            $available = $this->findAvailableLanguages($app);
+
+            // E.g. make sure that 'de' is before 'de_DE'.
+            sort($available);
+
+            $preferences = preg_split('/,\s*/', strtolower($header));
+            foreach ($preferences as $preference) {
+                list($preferred_language) = explode(';', $preference);
+                $preferred_language = str_replace('-', '_', $preferred_language);
+
+                foreach ($available as $available_language) {
+                    if ($preferred_language === strtolower($available_language)) {
+                        return $available_language;
+                    }
+                }
+
+                // Fallback from de_De to de
+                foreach ($available as $available_language) {
+                    if (substr($preferred_language, 0, 2) === $available_language) {
+                        return $available_language;
+                    }
+                }
+            }
+        }
+
+        throw new LanguageNotFoundException();
+    }
+
+    /**
+     * @param string|null $app App id or null for core
+     * @return string
+     */
+    public function setLanguageFromRequest($app = null) {
+
+        try {
+            $requestLanguage = $this->getLanguageFromRequest($app);
+        } catch (LanguageNotFoundException $e) {
+            $requestLanguage = 'en';
+        }
+
+        if ($app === null && !$this->requestLanguage) {
+            $this->requestLanguage = $requestLanguage;
+        }
+        return $requestLanguage;
+    }
+
+    /**
+     * Checks if $sub is a subdirectory of $parent
+     *
+     * @param string $sub
+     * @param string $parent
+     * @return bool
+     */
+    private function isSubDirectory($sub, $parent) {
+        // Check whether $sub contains no ".."
+        if(strpos($sub, '..') !== false) {
+            return false;
+        }
+
+        // Check whether $sub is a subdirectory of $parent
+        if (strpos($sub, $parent) === 0) {
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Get a list of language files that should be loaded
+     *
+     * @param string $app
+     * @param string $lang
+     * @return string[]
+     */
+    // FIXME This method is only public, until OC_L10N does not need it anymore,
+    // FIXME This is also the reason, why it is not in the public interface
+    public function getL10nFilesForApp($app, $lang) {
+        $languageFiles = [];
+
+        $i18nDir = $this->findL10nDir($app);
+        $transFile = strip_tags($i18nDir) . strip_tags($lang) . '.json';
+
+        if (($this->isSubDirectory($transFile, $this->serverRoot . '/core/l10n/')
+                || $this->isSubDirectory($transFile, $this->serverRoot . '/lib/l10n/')
+                || $this->isSubDirectory($transFile, $this->serverRoot . '/settings/l10n/')
+                || $this->isSubDirectory($transFile, \OC_App::getAppPath($app) . '/l10n/')
+            )
+            && file_exists($transFile)) {
+            // load the translations file
+            $languageFiles[] = $transFile;
+        }
+
+        // merge with translations from theme
+        $theme = $this->config->getSystemValue('theme');
+        if (!empty($theme)) {
+            $transFile = $this->serverRoot . '/themes/' . $theme . substr($transFile, strlen($this->serverRoot));
+            if (file_exists($transFile)) {
+                $languageFiles[] = $transFile;
+            }
+        }
+
+        return $languageFiles;
+    }
+
+    /**
+     * find the l10n directory
+     *
+     * @param string $app App id or empty string for core
+     * @return string directory
+     */
+    protected function findL10nDir($app = null) {
+        if (in_array($app, ['core', 'lib', 'settings'])) {
+            if (file_exists($this->serverRoot . '/' . $app . '/l10n/')) {
+                return $this->serverRoot . '/' . $app . '/l10n/';
+            }
+        } else if ($app && \OC_App::getAppPath($app) !== false) {
+            // Check if the app is in the app folder
+            return \OC_App::getAppPath($app) . '/l10n/';
+        }
+        return $this->serverRoot . '/core/l10n/';
+    }
+
+
+    /**
+     * Creates a function from the plural string
+     *
+     * Parts of the code is copied from Habari:
+     * https://github.com/habari/system/blob/master/classes/locale.php
+     * @param string $string
+     * @return string
+     */
+    public function createPluralFunction($string) {
+        if (isset($this->pluralFunctions[$string])) {
+            return $this->pluralFunctions[$string];
+        }
+
+        if (preg_match( '/^\s*nplurals\s*=\s*(\d+)\s*;\s*plural=(.*)$/u', $string, $matches)) {
+            // sanitize
+            $nplurals = preg_replace( '/[^0-9]/', '', $matches[1] );
+            $plural = preg_replace( '#[^n0-9:\(\)\?\|\&=!<>+*/\%-]#', '', $matches[2] );
+
+            $body = str_replace(
+                array( 'plural', 'n', '$n$plurals', ),
+                array( '$plural', '$n', '$nplurals', ),
+                'nplurals='. $nplurals . '; plural=' . $plural
+            );
+
+            // add parents
+            // important since PHP's ternary evaluates from left to right
+            $body .= ';';
+            $res = '';
+            $p = 0;
+            for($i = 0; $i < strlen($body); $i++) {
+                $ch = $body[$i];
+                switch ( $ch ) {
+                    case '?':
+                        $res .= ' ? (';
+                        $p++;
+                        break;
+                    case ':':
+                        $res .= ') : (';
+                        break;
+                    case ';':
+                        $res .= str_repeat( ')', $p ) . ';';
+                        $p = 0;
+                        break;
+                    default:
+                        $res .= $ch;
+                }
+            }
+
+            $body = $res . 'return ($plural>=$nplurals?$nplurals-1:$plural);';
+            $function = create_function('$n', $body);
+            $this->pluralFunctions[$string] = $function;
+            return $function;
+        } else {
+            // default: one plural form for all cases but n==1 (english)
+            $function = create_function(
+                '$n',
+                '$nplurals=2;$plural=($n==1?0:1);return ($plural>=$nplurals?$nplurals-1:$plural);'
+            );
+            $this->pluralFunctions[$string] = $function;
+            return $function;
+        }
+    }
 }

Spacing +25 added lines, -25 removed lines

@@ -131,9 +131,9 @@ 
 		 *
 		 * @link https://github.com/owncloud/core/issues/21955
 		 */
-		if($this->config->getSystemValue('installed', false)) {
-			$userId = !is_null($this->userSession->getUser()) ? $this->userSession->getUser()->getUID() :  null;
-			if(!is_null($userId)) {
+		if ($this->config->getSystemValue('installed', false)) {
+			$userId = !is_null($this->userSession->getUser()) ? $this->userSession->getUser()->getUID() : null;
+			if (!is_null($userId)) {
 				$userLang = $this->config->getUserValue($userId, 'core', 'lang', null);
 			} else {
 				$userLang = null;
@@ -202,7 +202,7 @@ 
 		// merge with translations from theme
 		$theme = $this->config->getSystemValue('theme');
 		if (!empty($theme)) {
-			$themeDir = $this->serverRoot . '/themes/' . $theme . substr($dir, strlen($this->serverRoot));
+			$themeDir = $this->serverRoot.'/themes/'.$theme.substr($dir, strlen($this->serverRoot));
 
 			if (is_dir($themeDir)) {
 				$files = scandir($themeDir);
@@ -297,7 +297,7 @@ 
 	 */
 	private function isSubDirectory($sub, $parent) {
 		// Check whether $sub contains no ".."
-		if(strpos($sub, '..') !== false) {
+		if (strpos($sub, '..') !== false) {
 			return false;
 		}
 
@@ -322,12 +322,12 @@ 
 		$languageFiles = [];
 
 		$i18nDir = $this->findL10nDir($app);
-		$transFile = strip_tags($i18nDir) . strip_tags($lang) . '.json';
+		$transFile = strip_tags($i18nDir).strip_tags($lang).'.json';
 
-		if (($this->isSubDirectory($transFile, $this->serverRoot . '/core/l10n/')
-				|| $this->isSubDirectory($transFile, $this->serverRoot . '/lib/l10n/')
-				|| $this->isSubDirectory($transFile, $this->serverRoot . '/settings/l10n/')
-				|| $this->isSubDirectory($transFile, \OC_App::getAppPath($app) . '/l10n/')
+		if (($this->isSubDirectory($transFile, $this->serverRoot.'/core/l10n/')
+				|| $this->isSubDirectory($transFile, $this->serverRoot.'/lib/l10n/')
+				|| $this->isSubDirectory($transFile, $this->serverRoot.'/settings/l10n/')
+				|| $this->isSubDirectory($transFile, \OC_App::getAppPath($app).'/l10n/')
 			)
 			&& file_exists($transFile)) {
 			// load the translations file
@@ -337,7 +337,7 @@ 
 		// merge with translations from theme
 		$theme = $this->config->getSystemValue('theme');
 		if (!empty($theme)) {
-			$transFile = $this->serverRoot . '/themes/' . $theme . substr($transFile, strlen($this->serverRoot));
+			$transFile = $this->serverRoot.'/themes/'.$theme.substr($transFile, strlen($this->serverRoot));
 			if (file_exists($transFile)) {
 				$languageFiles[] = $transFile;
 			}
@@ -354,14 +354,14 @@ 
 	 */
 	protected function findL10nDir($app = null) {
 		if (in_array($app, ['core', 'lib', 'settings'])) {
-			if (file_exists($this->serverRoot . '/' . $app . '/l10n/')) {
-				return $this->serverRoot . '/' . $app . '/l10n/';
+			if (file_exists($this->serverRoot.'/'.$app.'/l10n/')) {
+				return $this->serverRoot.'/'.$app.'/l10n/';
 			}
 		} else if ($app && \OC_App::getAppPath($app) !== false) {
 			// Check if the app is in the app folder
-			return \OC_App::getAppPath($app) . '/l10n/';
+			return \OC_App::getAppPath($app).'/l10n/';
 		}
-		return $this->serverRoot . '/core/l10n/';
+		return $this->serverRoot.'/core/l10n/';
 	}
 
 
@@ -378,15 +378,15 @@ 
 			return $this->pluralFunctions[$string];
 		}
 
-		if (preg_match( '/^\s*nplurals\s*=\s*(\d+)\s*;\s*plural=(.*)$/u', $string, $matches)) {
+		if (preg_match('/^\s*nplurals\s*=\s*(\d+)\s*;\s*plural=(.*)$/u', $string, $matches)) {
 			// sanitize
-			$nplurals = preg_replace( '/[^0-9]/', '', $matches[1] );
-			$plural = preg_replace( '#[^n0-9:\(\)\?\|\&=!<>+*/\%-]#', '', $matches[2] );
+			$nplurals = preg_replace('/[^0-9]/', '', $matches[1]);
+			$plural = preg_replace('#[^n0-9:\(\)\?\|\&=!<>+*/\%-]#', '', $matches[2]);
 
 			$body = str_replace(
-				array( 'plural', 'n', '$n$plurals', ),
-				array( '$plural', '$n', '$nplurals', ),
-				'nplurals='. $nplurals . '; plural=' . $plural
+				array('plural', 'n', '$n$plurals',),
+				array('$plural', '$n', '$nplurals',),
+				'nplurals='.$nplurals.'; plural='.$plural
 			);
 
 			// add parents
@@ -394,9 +394,9 @@ 
 			$body .= ';';
 			$res = '';
 			$p = 0;
-			for($i = 0; $i < strlen($body); $i++) {
+			for ($i = 0; $i < strlen($body); $i++) {
 				$ch = $body[$i];
-				switch ( $ch ) {
+				switch ($ch) {
 					case '?':
 						$res .= ' ? (';
 						$p++;
@@ -405,7 +405,7 @@ 
 						$res .= ') : (';
 						break;
 					case ';':
-						$res .= str_repeat( ')', $p ) . ';';
+						$res .= str_repeat(')', $p).';';
 						$p = 0;
 						break;
 					default:
@@ -413,7 +413,7 @@ 
 				}
 			}
 
-			$body = $res . 'return ($plural>=$nplurals?$nplurals-1:$plural);';
+			$body = $res.'return ($plural>=$nplurals?$nplurals-1:$plural);';
 			$function = create_function('$n', $body);
 			$this->pluralFunctions[$string] = $function;
 			return $function;

lib/private/Installer.php

Unused Use Statements -1 removed lines

@@ -45,7 +45,6 @@
 use OC\App\CodeChecker\CodeChecker;
 use OC\App\CodeChecker\EmptyCheck;
 use OC\App\CodeChecker\PrivateCheck;
-use OC\Archive\Archive;
 use OC\Archive\TAR;
 use OC_App;
 use OC_DB;

Indentation +489 added lines, -489 removed lines

@@ -60,493 +60,493 @@
  * This class provides the functionality needed to install, update and remove apps
  */
 class Installer {
-	/** @var AppFetcher */
-	private $appFetcher;
-	/** @var IClientService */
-	private $clientService;
-	/** @var ITempManager */
-	private $tempManager;
-	/** @var ILogger */
-	private $logger;
-
-	/**
-	 * @param AppFetcher $appFetcher
-	 * @param IClientService $clientService
-	 * @param ITempManager $tempManager
-	 * @param ILogger $logger
-	 */
-	public function __construct(AppFetcher $appFetcher,
-								IClientService $clientService,
-								ITempManager $tempManager,
-								ILogger $logger) {
-		$this->appFetcher = $appFetcher;
-		$this->clientService = $clientService;
-		$this->tempManager = $tempManager;
-		$this->logger = $logger;
-	}
-
-	/**
-	 * Installs an app that is located in one of the app folders already
-	 *
-	 * @param string $appId App to install
-	 * @throws \Exception
-	 * @return integer
-	 */
-	public function installApp($appId) {
-		$app = \OC_App::findAppInDirectories($appId);
-		if($app === false) {
-			throw new \Exception('App not found in any app directory');
-		}
-
-		$basedir = $app['path'].'/'.$appId;
-		$info = OC_App::getAppInfo($basedir.'/appinfo/info.xml', true);
-
-		//install the database
-		if(is_file($basedir.'/appinfo/database.xml')) {
-			if (\OC::$server->getAppConfig()->getValue($info['id'], 'installed_version') === null) {
-				OC_DB::createDbFromStructure($basedir.'/appinfo/database.xml');
-			} else {
-				OC_DB::updateDbFromStructure($basedir.'/appinfo/database.xml');
-			}
-		}
-
-		\OC_App::setupBackgroundJobs($info['background-jobs']);
-
-		//run appinfo/install.php
-		if((!isset($data['noinstall']) or $data['noinstall']==false)) {
-			self::includeAppScript($basedir . '/appinfo/install.php');
-		}
-
-		$appData = OC_App::getAppInfo($appId);
-		OC_App::executeRepairSteps($appId, $appData['repair-steps']['install']);
-
-		//set the installed version
-		\OC::$server->getConfig()->setAppValue($info['id'], 'installed_version', OC_App::getAppVersion($info['id'], false));
-		\OC::$server->getConfig()->setAppValue($info['id'], 'enabled', 'no');
-
-		//set remote/public handlers
-		foreach($info['remote'] as $name=>$path) {
-			\OC::$server->getConfig()->setAppValue('core', 'remote_'.$name, $info['id'].'/'.$path);
-		}
-		foreach($info['public'] as $name=>$path) {
-			\OC::$server->getConfig()->setAppValue('core', 'public_'.$name, $info['id'].'/'.$path);
-		}
-
-		OC_App::setAppTypes($info['id']);
-
-		return $info['id'];
-	}
-
-	/**
-	 * @brief checks whether or not an app is installed
-	 * @param string $app app
-	 * @returns bool
-	 *
-	 * Checks whether or not an app is installed, i.e. registered in apps table.
-	 */
-	public static function isInstalled( $app ) {
-		return (\OC::$server->getConfig()->getAppValue($app, "installed_version", null) !== null);
-	}
-
-	/**
-	 * Updates the specified app from the appstore
-	 *
-	 * @param string $appId
-	 * @return bool
-	 */
-	public function updateAppstoreApp($appId) {
-		if(self::isUpdateAvailable($appId, $this->appFetcher)) {
-			try {
-				$this->downloadApp($appId);
-			} catch (\Exception $e) {
-				$this->logger->error($e->getMessage(), ['app' => 'core']);
-				return false;
-			}
-			return OC_App::updateApp($appId);
-		}
-
-		return false;
-	}
-
-	/**
-	 * Downloads an app and puts it into the app directory
-	 *
-	 * @param string $appId
-	 *
-	 * @throws \Exception If the installation was not successful
-	 */
-	public function downloadApp($appId) {
-		$appId = strtolower($appId);
-
-		$apps = $this->appFetcher->get();
-		foreach($apps as $app) {
-			if($app['id'] === $appId) {
-				// Load the certificate
-				$certificate = new X509();
-				$certificate->loadCA(file_get_contents(__DIR__ . '/../../resources/codesigning/root.crt'));
-				$loadedCertificate = $certificate->loadX509($app['certificate']);
-
-				// Verify if the certificate has been revoked
-				$crl = new X509();
-				$crl->loadCA(file_get_contents(__DIR__ . '/../../resources/codesigning/root.crt'));
-				$crl->loadCRL(file_get_contents(__DIR__ . '/../../resources/codesigning/root.crl'));
-				if($crl->validateSignature() !== true) {
-					throw new \Exception('Could not validate CRL signature');
-				}
-				$csn = $loadedCertificate['tbsCertificate']['serialNumber']->toString();
-				$revoked = $crl->getRevoked($csn);
-				if ($revoked !== false) {
-					throw new \Exception(
-						sprintf(
-							'Certificate "%s" has been revoked',
-							$csn
-						)
-					);
-				}
-
-				// Verify if the certificate has been issued by the Nextcloud Code Authority CA
-				if($certificate->validateSignature() !== true) {
-					throw new \Exception(
-						sprintf(
-							'App with id %s has a certificate not issued by a trusted Code Signing Authority',
-							$appId
-						)
-					);
-				}
-
-				// Verify if the certificate is issued for the requested app id
-				$certInfo = openssl_x509_parse($app['certificate']);
-				if(!isset($certInfo['subject']['CN'])) {
-					throw new \Exception(
-						sprintf(
-							'App with id %s has a cert with no CN',
-							$appId
-						)
-					);
-				}
-				if($certInfo['subject']['CN'] !== $appId) {
-					throw new \Exception(
-						sprintf(
-							'App with id %s has a cert issued to %s',
-							$appId,
-							$certInfo['subject']['CN']
-						)
-					);
-				}
-
-				// Download the release
-				$tempFile = $this->tempManager->getTemporaryFile('.tar.gz');
-				$client = $this->clientService->newClient();
-				$client->get($app['releases'][0]['download'], ['save_to' => $tempFile]);
-
-				// Check if the signature actually matches the downloaded content
-				$certificate = openssl_get_publickey($app['certificate']);
-				$verified = (bool)openssl_verify(file_get_contents($tempFile), base64_decode($app['releases'][0]['signature']), $certificate, OPENSSL_ALGO_SHA512);
-				openssl_free_key($certificate);
-
-				if($verified === true) {
-					// Seems to match, let's proceed
-					$extractDir = $this->tempManager->getTemporaryFolder();
-					$archive = new TAR($tempFile);
-
-					if($archive) {
-						$archive->extract($extractDir);
-						$allFiles = scandir($extractDir);
-						$folders = array_diff($allFiles, ['.', '..']);
-						$folders = array_values($folders);
-
-						if(count($folders) > 1) {
-							throw new \Exception(
-								sprintf(
-									'Extracted app %s has more than 1 folder',
-									$appId
-								)
-							);
-						}
-
-						// Check if appinfo/info.xml has the same app ID as well
-						$loadEntities = libxml_disable_entity_loader(false);
-						$xml = simplexml_load_file($extractDir . '/' . $folders[0] . '/appinfo/info.xml');
-						libxml_disable_entity_loader($loadEntities);
-						if((string)$xml->id !== $appId) {
-							throw new \Exception(
-								sprintf(
-									'App for id %s has a wrong app ID in info.xml: %s',
-									$appId,
-									(string)$xml->id
-								)
-							);
-						}
-
-						// Check if the version is lower than before
-						$currentVersion = OC_App::getAppVersion($appId);
-						$newVersion = (string)$xml->version;
-						if(version_compare($currentVersion, $newVersion) === 1) {
-							throw new \Exception(
-								sprintf(
-									'App for id %s has version %s and tried to update to lower version %s',
-									$appId,
-									$currentVersion,
-									$newVersion
-								)
-							);
-						}
-
-						$baseDir = OC_App::getInstallPath() . '/' . $appId;
-						// Remove old app with the ID if existent
-						OC_Helper::rmdirr($baseDir);
-						// Move to app folder
-						if(@mkdir($baseDir)) {
-							$extractDir .= '/' . $folders[0];
-							OC_Helper::copyr($extractDir, $baseDir);
-						}
-						OC_Helper::copyr($extractDir, $baseDir);
-						OC_Helper::rmdirr($extractDir);
-						return;
-					} else {
-						throw new \Exception(
-							sprintf(
-								'Could not extract app with ID %s to %s',
-								$appId,
-								$extractDir
-							)
-						);
-					}
-				} else {
-					// Signature does not match
-					throw new \Exception(
-						sprintf(
-							'App with id %s has invalid signature',
-							$appId
-						)
-					);
-				}
-			}
-		}
-
-		throw new \Exception(
-			sprintf(
-				'Could not download app %s',
-				$appId
-			)
-		);
-	}
-
-	/**
-	 * Check if an update for the app is available
-	 *
-	 * @param string $appId
-	 * @param AppFetcher $appFetcher
-	 * @return string|false false or the version number of the update
-	 */
-	public static function isUpdateAvailable($appId,
-									  AppFetcher $appFetcher) {
-		static $isInstanceReadyForUpdates = null;
-
-		if ($isInstanceReadyForUpdates === null) {
-			$installPath = OC_App::getInstallPath();
-			if ($installPath === false || $installPath === null) {
-				$isInstanceReadyForUpdates = false;
-			} else {
-				$isInstanceReadyForUpdates = true;
-			}
-		}
-
-		if ($isInstanceReadyForUpdates === false) {
-			return false;
-		}
-
-		$apps = $appFetcher->get();
-		foreach($apps as $app) {
-			if($app['id'] === $appId) {
-				$currentVersion = OC_App::getAppVersion($appId);
-				$newestVersion = $app['releases'][0]['version'];
-				if (version_compare($newestVersion, $currentVersion, '>')) {
-					return $newestVersion;
-				} else {
-					return false;
-				}
-			}
-		}
-
-		return false;
-	}
-
-	/**
-	 * Check if app is already downloaded
-	 * @param string $name name of the application to remove
-	 * @return boolean
-	 *
-	 * The function will check if the app is already downloaded in the apps repository
-	 */
-	public function isDownloaded($name) {
-		foreach(\OC::$APPSROOTS as $dir) {
-			$dirToTest  = $dir['path'];
-			$dirToTest .= '/';
-			$dirToTest .= $name;
-			$dirToTest .= '/';
-
-			if (is_dir($dirToTest)) {
-				return true;
-			}
-		}
-
-		return false;
-	}
-
-	/**
-	 * Removes an app
-	 * @param string $appId ID of the application to remove
-	 * @return boolean
-	 *
-	 *
-	 * This function works as follows
-	 *   -# call uninstall repair steps
-	 *   -# removing the files
-	 *
-	 * The function will not delete preferences, tables and the configuration,
-	 * this has to be done by the function oc_app_uninstall().
-	 */
-	public function removeApp($appId) {
-		if($this->isDownloaded( $appId )) {
-			$appDir = OC_App::getInstallPath() . '/' . $appId;
-			OC_Helper::rmdirr($appDir);
-			return true;
-		}else{
-			\OCP\Util::writeLog('core', 'can\'t remove app '.$appId.'. It is not installed.', \OCP\Util::ERROR);
-
-			return false;
-		}
-
-	}
-
-	/**
-	 * Installs shipped apps
-	 *
-	 * This function installs all apps found in the 'apps' directory that should be enabled by default;
-	 * @param bool $softErrors When updating we ignore errors and simply log them, better to have a
-	 *                         working ownCloud at the end instead of an aborted update.
-	 * @return array Array of error messages (appid => Exception)
-	 */
-	public static function installShippedApps($softErrors = false) {
-		$errors = [];
-		foreach(\OC::$APPSROOTS as $app_dir) {
-			if($dir = opendir( $app_dir['path'] )) {
-				while( false !== ( $filename = readdir( $dir ))) {
-					if( substr( $filename, 0, 1 ) != '.' and is_dir($app_dir['path']."/$filename") ) {
-						if( file_exists( $app_dir['path']."/$filename/appinfo/info.xml" )) {
-							if(!Installer::isInstalled($filename)) {
-								$info=OC_App::getAppInfo($filename);
-								$enabled = isset($info['default_enable']);
-								if (($enabled || in_array($filename, \OC::$server->getAppManager()->getAlwaysEnabledApps()))
-									  && \OC::$server->getConfig()->getAppValue($filename, 'enabled') !== 'no') {
-									if ($softErrors) {
-										try {
-											Installer::installShippedApp($filename);
-										} catch (HintException $e) {
-											if ($e->getPrevious() instanceof TableExistsException) {
-												$errors[$filename] = $e;
-												continue;
-											}
-											throw $e;
-										}
-									} else {
-										Installer::installShippedApp($filename);
-									}
-									\OC::$server->getConfig()->setAppValue($filename, 'enabled', 'yes');
-								}
-							}
-						}
-					}
-				}
-				closedir( $dir );
-			}
-		}
-
-		return $errors;
-	}
-
-	/**
-	 * install an app already placed in the app folder
-	 * @param string $app id of the app to install
-	 * @return integer
-	 */
-	public static function installShippedApp($app) {
-		//install the database
-		$appPath = OC_App::getAppPath($app);
-		if(is_file("$appPath/appinfo/database.xml")) {
-			try {
-				OC_DB::createDbFromStructure("$appPath/appinfo/database.xml");
-			} catch (TableExistsException $e) {
-				throw new HintException(
-					'Failed to enable app ' . $app,
-					'Please ask for help via one of our <a href="https://nextcloud.com/support/" target="_blank" rel="noreferrer">support channels</a>.',
-					0, $e
-				);
-			}
-		}
-
-		//run appinfo/install.php
-		\OC_App::registerAutoloading($app, $appPath);
-		self::includeAppScript("$appPath/appinfo/install.php");
-
-		$info = OC_App::getAppInfo($app);
-		if (is_null($info)) {
-			return false;
-		}
-		\OC_App::setupBackgroundJobs($info['background-jobs']);
-
-		OC_App::executeRepairSteps($app, $info['repair-steps']['install']);
-
-		$config = \OC::$server->getConfig();
-
-		$config->setAppValue($app, 'installed_version', OC_App::getAppVersion($app));
-		if (array_key_exists('ocsid', $info)) {
-			$config->setAppValue($app, 'ocsid', $info['ocsid']);
-		}
-
-		//set remote/public handlers
-		foreach($info['remote'] as $name=>$path) {
-			$config->setAppValue('core', 'remote_'.$name, $app.'/'.$path);
-		}
-		foreach($info['public'] as $name=>$path) {
-			$config->setAppValue('core', 'public_'.$name, $app.'/'.$path);
-		}
-
-		OC_App::setAppTypes($info['id']);
-
-		if(isset($info['settings']) && is_array($info['settings'])) {
-			// requires that autoloading was registered for the app,
-			// as happens before running the install.php some lines above
-			\OC::$server->getSettingsManager()->setupSettings($info['settings']);
-		}
-
-		return $info['id'];
-	}
-
-	/**
-	 * check the code of an app with some static code checks
-	 * @param string $folder the folder of the app to check
-	 * @return boolean true for app is o.k. and false for app is not o.k.
-	 */
-	public static function checkCode($folder) {
-		// is the code checker enabled?
-		if(!\OC::$server->getConfig()->getSystemValue('appcodechecker', false)) {
-			return true;
-		}
-
-		$codeChecker = new CodeChecker(new PrivateCheck(new EmptyCheck()));
-		$errors = $codeChecker->analyseFolder(basename($folder), $folder);
-
-		return empty($errors);
-	}
-
-	/**
-	 * @param string $script
-	 */
-	private static function includeAppScript($script) {
-		if ( file_exists($script) ){
-			include $script;
-		}
-	}
+    /** @var AppFetcher */
+    private $appFetcher;
+    /** @var IClientService */
+    private $clientService;
+    /** @var ITempManager */
+    private $tempManager;
+    /** @var ILogger */
+    private $logger;
+
+    /**
+     * @param AppFetcher $appFetcher
+     * @param IClientService $clientService
+     * @param ITempManager $tempManager
+     * @param ILogger $logger
+     */
+    public function __construct(AppFetcher $appFetcher,
+                                IClientService $clientService,
+                                ITempManager $tempManager,
+                                ILogger $logger) {
+        $this->appFetcher = $appFetcher;
+        $this->clientService = $clientService;
+        $this->tempManager = $tempManager;
+        $this->logger = $logger;
+    }
+
+    /**
+     * Installs an app that is located in one of the app folders already
+     *
+     * @param string $appId App to install
+     * @throws \Exception
+     * @return integer
+     */
+    public function installApp($appId) {
+        $app = \OC_App::findAppInDirectories($appId);
+        if($app === false) {
+            throw new \Exception('App not found in any app directory');
+        }
+
+        $basedir = $app['path'].'/'.$appId;
+        $info = OC_App::getAppInfo($basedir.'/appinfo/info.xml', true);
+
+        //install the database
+        if(is_file($basedir.'/appinfo/database.xml')) {
+            if (\OC::$server->getAppConfig()->getValue($info['id'], 'installed_version') === null) {
+                OC_DB::createDbFromStructure($basedir.'/appinfo/database.xml');
+            } else {
+                OC_DB::updateDbFromStructure($basedir.'/appinfo/database.xml');
+            }
+        }
+
+        \OC_App::setupBackgroundJobs($info['background-jobs']);
+
+        //run appinfo/install.php
+        if((!isset($data['noinstall']) or $data['noinstall']==false)) {
+            self::includeAppScript($basedir . '/appinfo/install.php');
+        }
+
+        $appData = OC_App::getAppInfo($appId);
+        OC_App::executeRepairSteps($appId, $appData['repair-steps']['install']);
+
+        //set the installed version
+        \OC::$server->getConfig()->setAppValue($info['id'], 'installed_version', OC_App::getAppVersion($info['id'], false));
+        \OC::$server->getConfig()->setAppValue($info['id'], 'enabled', 'no');
+
+        //set remote/public handlers
+        foreach($info['remote'] as $name=>$path) {
+            \OC::$server->getConfig()->setAppValue('core', 'remote_'.$name, $info['id'].'/'.$path);
+        }
+        foreach($info['public'] as $name=>$path) {
+            \OC::$server->getConfig()->setAppValue('core', 'public_'.$name, $info['id'].'/'.$path);
+        }
+
+        OC_App::setAppTypes($info['id']);
+
+        return $info['id'];
+    }
+
+    /**
+     * @brief checks whether or not an app is installed
+     * @param string $app app
+     * @returns bool
+     *
+     * Checks whether or not an app is installed, i.e. registered in apps table.
+     */
+    public static function isInstalled( $app ) {
+        return (\OC::$server->getConfig()->getAppValue($app, "installed_version", null) !== null);
+    }
+
+    /**
+     * Updates the specified app from the appstore
+     *
+     * @param string $appId
+     * @return bool
+     */
+    public function updateAppstoreApp($appId) {
+        if(self::isUpdateAvailable($appId, $this->appFetcher)) {
+            try {
+                $this->downloadApp($appId);
+            } catch (\Exception $e) {
+                $this->logger->error($e->getMessage(), ['app' => 'core']);
+                return false;
+            }
+            return OC_App::updateApp($appId);
+        }
+
+        return false;
+    }
+
+    /**
+     * Downloads an app and puts it into the app directory
+     *
+     * @param string $appId
+     *
+     * @throws \Exception If the installation was not successful
+     */
+    public function downloadApp($appId) {
+        $appId = strtolower($appId);
+
+        $apps = $this->appFetcher->get();
+        foreach($apps as $app) {
+            if($app['id'] === $appId) {
+                // Load the certificate
+                $certificate = new X509();
+                $certificate->loadCA(file_get_contents(__DIR__ . '/../../resources/codesigning/root.crt'));
+                $loadedCertificate = $certificate->loadX509($app['certificate']);
+
+                // Verify if the certificate has been revoked
+                $crl = new X509();
+                $crl->loadCA(file_get_contents(__DIR__ . '/../../resources/codesigning/root.crt'));
+                $crl->loadCRL(file_get_contents(__DIR__ . '/../../resources/codesigning/root.crl'));
+                if($crl->validateSignature() !== true) {
+                    throw new \Exception('Could not validate CRL signature');
+                }
+                $csn = $loadedCertificate['tbsCertificate']['serialNumber']->toString();
+                $revoked = $crl->getRevoked($csn);
+                if ($revoked !== false) {
+                    throw new \Exception(
+                        sprintf(
+                            'Certificate "%s" has been revoked',
+                            $csn
+                        )
+                    );
+                }
+
+                // Verify if the certificate has been issued by the Nextcloud Code Authority CA
+                if($certificate->validateSignature() !== true) {
+                    throw new \Exception(
+                        sprintf(
+                            'App with id %s has a certificate not issued by a trusted Code Signing Authority',
+                            $appId
+                        )
+                    );
+                }
+
+                // Verify if the certificate is issued for the requested app id
+                $certInfo = openssl_x509_parse($app['certificate']);
+                if(!isset($certInfo['subject']['CN'])) {
+                    throw new \Exception(
+                        sprintf(
+                            'App with id %s has a cert with no CN',
+                            $appId
+                        )
+                    );
+                }
+                if($certInfo['subject']['CN'] !== $appId) {
+                    throw new \Exception(
+                        sprintf(
+                            'App with id %s has a cert issued to %s',
+                            $appId,
+                            $certInfo['subject']['CN']
+                        )
+                    );
+                }
+
+                // Download the release
+                $tempFile = $this->tempManager->getTemporaryFile('.tar.gz');
+                $client = $this->clientService->newClient();
+                $client->get($app['releases'][0]['download'], ['save_to' => $tempFile]);
+
+                // Check if the signature actually matches the downloaded content
+                $certificate = openssl_get_publickey($app['certificate']);
+                $verified = (bool)openssl_verify(file_get_contents($tempFile), base64_decode($app['releases'][0]['signature']), $certificate, OPENSSL_ALGO_SHA512);
+                openssl_free_key($certificate);
+
+                if($verified === true) {
+                    // Seems to match, let's proceed
+                    $extractDir = $this->tempManager->getTemporaryFolder();
+                    $archive = new TAR($tempFile);
+
+                    if($archive) {
+                        $archive->extract($extractDir);
+                        $allFiles = scandir($extractDir);
+                        $folders = array_diff($allFiles, ['.', '..']);
+                        $folders = array_values($folders);
+
+                        if(count($folders) > 1) {
+                            throw new \Exception(
+                                sprintf(
+                                    'Extracted app %s has more than 1 folder',
+                                    $appId
+                                )
+                            );
+                        }
+
+                        // Check if appinfo/info.xml has the same app ID as well
+                        $loadEntities = libxml_disable_entity_loader(false);
+                        $xml = simplexml_load_file($extractDir . '/' . $folders[0] . '/appinfo/info.xml');
+                        libxml_disable_entity_loader($loadEntities);
+                        if((string)$xml->id !== $appId) {
+                            throw new \Exception(
+                                sprintf(
+                                    'App for id %s has a wrong app ID in info.xml: %s',
+                                    $appId,
+                                    (string)$xml->id
+                                )
+                            );
+                        }
+
+                        // Check if the version is lower than before
+                        $currentVersion = OC_App::getAppVersion($appId);
+                        $newVersion = (string)$xml->version;
+                        if(version_compare($currentVersion, $newVersion) === 1) {
+                            throw new \Exception(
+                                sprintf(
+                                    'App for id %s has version %s and tried to update to lower version %s',
+                                    $appId,
+                                    $currentVersion,
+                                    $newVersion
+                                )
+                            );
+                        }
+
+                        $baseDir = OC_App::getInstallPath() . '/' . $appId;
+                        // Remove old app with the ID if existent
+                        OC_Helper::rmdirr($baseDir);
+                        // Move to app folder
+                        if(@mkdir($baseDir)) {
+                            $extractDir .= '/' . $folders[0];
+                            OC_Helper::copyr($extractDir, $baseDir);
+                        }
+                        OC_Helper::copyr($extractDir, $baseDir);
+                        OC_Helper::rmdirr($extractDir);
+                        return;
+                    } else {
+                        throw new \Exception(
+                            sprintf(
+                                'Could not extract app with ID %s to %s',
+                                $appId,
+                                $extractDir
+                            )
+                        );
+                    }
+                } else {
+                    // Signature does not match
+                    throw new \Exception(
+                        sprintf(
+                            'App with id %s has invalid signature',
+                            $appId
+                        )
+                    );
+                }
+            }
+        }
+
+        throw new \Exception(
+            sprintf(
+                'Could not download app %s',
+                $appId
+            )
+        );
+    }
+
+    /**
+     * Check if an update for the app is available
+     *
+     * @param string $appId
+     * @param AppFetcher $appFetcher
+     * @return string|false false or the version number of the update
+     */
+    public static function isUpdateAvailable($appId,
+                                        AppFetcher $appFetcher) {
+        static $isInstanceReadyForUpdates = null;
+
+        if ($isInstanceReadyForUpdates === null) {
+            $installPath = OC_App::getInstallPath();
+            if ($installPath === false || $installPath === null) {
+                $isInstanceReadyForUpdates = false;
+            } else {
+                $isInstanceReadyForUpdates = true;
+            }
+        }
+
+        if ($isInstanceReadyForUpdates === false) {
+            return false;
+        }
+
+        $apps = $appFetcher->get();
+        foreach($apps as $app) {
+            if($app['id'] === $appId) {
+                $currentVersion = OC_App::getAppVersion($appId);
+                $newestVersion = $app['releases'][0]['version'];
+                if (version_compare($newestVersion, $currentVersion, '>')) {
+                    return $newestVersion;
+                } else {
+                    return false;
+                }
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Check if app is already downloaded
+     * @param string $name name of the application to remove
+     * @return boolean
+     *
+     * The function will check if the app is already downloaded in the apps repository
+     */
+    public function isDownloaded($name) {
+        foreach(\OC::$APPSROOTS as $dir) {
+            $dirToTest  = $dir['path'];
+            $dirToTest .= '/';
+            $dirToTest .= $name;
+            $dirToTest .= '/';
+
+            if (is_dir($dirToTest)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Removes an app
+     * @param string $appId ID of the application to remove
+     * @return boolean
+     *
+     *
+     * This function works as follows
+     *   -# call uninstall repair steps
+     *   -# removing the files
+     *
+     * The function will not delete preferences, tables and the configuration,
+     * this has to be done by the function oc_app_uninstall().
+     */
+    public function removeApp($appId) {
+        if($this->isDownloaded( $appId )) {
+            $appDir = OC_App::getInstallPath() . '/' . $appId;
+            OC_Helper::rmdirr($appDir);
+            return true;
+        }else{
+            \OCP\Util::writeLog('core', 'can\'t remove app '.$appId.'. It is not installed.', \OCP\Util::ERROR);
+
+            return false;
+        }
+
+    }
+
+    /**
+     * Installs shipped apps
+     *
+     * This function installs all apps found in the 'apps' directory that should be enabled by default;
+     * @param bool $softErrors When updating we ignore errors and simply log them, better to have a
+     *                         working ownCloud at the end instead of an aborted update.
+     * @return array Array of error messages (appid => Exception)
+     */
+    public static function installShippedApps($softErrors = false) {
+        $errors = [];
+        foreach(\OC::$APPSROOTS as $app_dir) {
+            if($dir = opendir( $app_dir['path'] )) {
+                while( false !== ( $filename = readdir( $dir ))) {
+                    if( substr( $filename, 0, 1 ) != '.' and is_dir($app_dir['path']."/$filename") ) {
+                        if( file_exists( $app_dir['path']."/$filename/appinfo/info.xml" )) {
+                            if(!Installer::isInstalled($filename)) {
+                                $info=OC_App::getAppInfo($filename);
+                                $enabled = isset($info['default_enable']);
+                                if (($enabled || in_array($filename, \OC::$server->getAppManager()->getAlwaysEnabledApps()))
+                                      && \OC::$server->getConfig()->getAppValue($filename, 'enabled') !== 'no') {
+                                    if ($softErrors) {
+                                        try {
+                                            Installer::installShippedApp($filename);
+                                        } catch (HintException $e) {
+                                            if ($e->getPrevious() instanceof TableExistsException) {
+                                                $errors[$filename] = $e;
+                                                continue;
+                                            }
+                                            throw $e;
+                                        }
+                                    } else {
+                                        Installer::installShippedApp($filename);
+                                    }
+                                    \OC::$server->getConfig()->setAppValue($filename, 'enabled', 'yes');
+                                }
+                            }
+                        }
+                    }
+                }
+                closedir( $dir );
+            }
+        }
+
+        return $errors;
+    }
+
+    /**
+     * install an app already placed in the app folder
+     * @param string $app id of the app to install
+     * @return integer
+     */
+    public static function installShippedApp($app) {
+        //install the database
+        $appPath = OC_App::getAppPath($app);
+        if(is_file("$appPath/appinfo/database.xml")) {
+            try {
+                OC_DB::createDbFromStructure("$appPath/appinfo/database.xml");
+            } catch (TableExistsException $e) {
+                throw new HintException(
+                    'Failed to enable app ' . $app,
+                    'Please ask for help via one of our <a href="https://nextcloud.com/support/" target="_blank" rel="noreferrer">support channels</a>.',
+                    0, $e
+                );
+            }
+        }
+
+        //run appinfo/install.php
+        \OC_App::registerAutoloading($app, $appPath);
+        self::includeAppScript("$appPath/appinfo/install.php");
+
+        $info = OC_App::getAppInfo($app);
+        if (is_null($info)) {
+            return false;
+        }
+        \OC_App::setupBackgroundJobs($info['background-jobs']);
+
+        OC_App::executeRepairSteps($app, $info['repair-steps']['install']);
+
+        $config = \OC::$server->getConfig();
+
+        $config->setAppValue($app, 'installed_version', OC_App::getAppVersion($app));
+        if (array_key_exists('ocsid', $info)) {
+            $config->setAppValue($app, 'ocsid', $info['ocsid']);
+        }
+
+        //set remote/public handlers
+        foreach($info['remote'] as $name=>$path) {
+            $config->setAppValue('core', 'remote_'.$name, $app.'/'.$path);
+        }
+        foreach($info['public'] as $name=>$path) {
+            $config->setAppValue('core', 'public_'.$name, $app.'/'.$path);
+        }
+
+        OC_App::setAppTypes($info['id']);
+
+        if(isset($info['settings']) && is_array($info['settings'])) {
+            // requires that autoloading was registered for the app,
+            // as happens before running the install.php some lines above
+            \OC::$server->getSettingsManager()->setupSettings($info['settings']);
+        }
+
+        return $info['id'];
+    }
+
+    /**
+     * check the code of an app with some static code checks
+     * @param string $folder the folder of the app to check
+     * @return boolean true for app is o.k. and false for app is not o.k.
+     */
+    public static function checkCode($folder) {
+        // is the code checker enabled?
+        if(!\OC::$server->getConfig()->getSystemValue('appcodechecker', false)) {
+            return true;
+        }
+
+        $codeChecker = new CodeChecker(new PrivateCheck(new EmptyCheck()));
+        $errors = $codeChecker->analyseFolder(basename($folder), $folder);
+
+        return empty($errors);
+    }
+
+    /**
+     * @param string $script
+     */
+    private static function includeAppScript($script) {
+        if ( file_exists($script) ){
+            include $script;
+        }
+    }
 }

Spacing +50 added lines, -50 removed lines

@@ -94,7 +94,7 @@ 
 	 */
 	public function installApp($appId) {
 		$app = \OC_App::findAppInDirectories($appId);
-		if($app === false) {
+		if ($app === false) {
 			throw new \Exception('App not found in any app directory');
 		}
 
@@ -102,7 +102,7 @@ 
 		$info = OC_App::getAppInfo($basedir.'/appinfo/info.xml', true);
 
 		//install the database
-		if(is_file($basedir.'/appinfo/database.xml')) {
+		if (is_file($basedir.'/appinfo/database.xml')) {
 			if (\OC::$server->getAppConfig()->getValue($info['id'], 'installed_version') === null) {
 				OC_DB::createDbFromStructure($basedir.'/appinfo/database.xml');
 			} else {
@@ -113,8 +113,8 @@ 
 		\OC_App::setupBackgroundJobs($info['background-jobs']);
 
 		//run appinfo/install.php
-		if((!isset($data['noinstall']) or $data['noinstall']==false)) {
-			self::includeAppScript($basedir . '/appinfo/install.php');
+		if ((!isset($data['noinstall']) or $data['noinstall'] == false)) {
+			self::includeAppScript($basedir.'/appinfo/install.php');
 		}
 
 		$appData = OC_App::getAppInfo($appId);
@@ -125,10 +125,10 @@ 
 		\OC::$server->getConfig()->setAppValue($info['id'], 'enabled', 'no');
 
 		//set remote/public handlers
-		foreach($info['remote'] as $name=>$path) {
+		foreach ($info['remote'] as $name=>$path) {
 			\OC::$server->getConfig()->setAppValue('core', 'remote_'.$name, $info['id'].'/'.$path);
 		}
-		foreach($info['public'] as $name=>$path) {
+		foreach ($info['public'] as $name=>$path) {
 			\OC::$server->getConfig()->setAppValue('core', 'public_'.$name, $info['id'].'/'.$path);
 		}
 
@@ -144,7 +144,7 @@ 
 	 *
 	 * Checks whether or not an app is installed, i.e. registered in apps table.
 	 */
-	public static function isInstalled( $app ) {
+	public static function isInstalled($app) {
 		return (\OC::$server->getConfig()->getAppValue($app, "installed_version", null) !== null);
 	}
 
@@ -155,7 +155,7 @@ 
 	 * @return bool
 	 */
 	public function updateAppstoreApp($appId) {
-		if(self::isUpdateAvailable($appId, $this->appFetcher)) {
+		if (self::isUpdateAvailable($appId, $this->appFetcher)) {
 			try {
 				$this->downloadApp($appId);
 			} catch (\Exception $e) {
@@ -179,18 +179,18 @@ 
 		$appId = strtolower($appId);
 
 		$apps = $this->appFetcher->get();
-		foreach($apps as $app) {
-			if($app['id'] === $appId) {
+		foreach ($apps as $app) {
+			if ($app['id'] === $appId) {
 				// Load the certificate
 				$certificate = new X509();
-				$certificate->loadCA(file_get_contents(__DIR__ . '/../../resources/codesigning/root.crt'));
+				$certificate->loadCA(file_get_contents(__DIR__.'/../../resources/codesigning/root.crt'));
 				$loadedCertificate = $certificate->loadX509($app['certificate']);
 
 				// Verify if the certificate has been revoked
 				$crl = new X509();
-				$crl->loadCA(file_get_contents(__DIR__ . '/../../resources/codesigning/root.crt'));
-				$crl->loadCRL(file_get_contents(__DIR__ . '/../../resources/codesigning/root.crl'));
-				if($crl->validateSignature() !== true) {
+				$crl->loadCA(file_get_contents(__DIR__.'/../../resources/codesigning/root.crt'));
+				$crl->loadCRL(file_get_contents(__DIR__.'/../../resources/codesigning/root.crl'));
+				if ($crl->validateSignature() !== true) {
 					throw new \Exception('Could not validate CRL signature');
 				}
 				$csn = $loadedCertificate['tbsCertificate']['serialNumber']->toString();
@@ -205,7 +205,7 @@ 
 				}
 
 				// Verify if the certificate has been issued by the Nextcloud Code Authority CA
-				if($certificate->validateSignature() !== true) {
+				if ($certificate->validateSignature() !== true) {
 					throw new \Exception(
 						sprintf(
 							'App with id %s has a certificate not issued by a trusted Code Signing Authority',
@@ -216,7 +216,7 @@ 
 
 				// Verify if the certificate is issued for the requested app id
 				$certInfo = openssl_x509_parse($app['certificate']);
-				if(!isset($certInfo['subject']['CN'])) {
+				if (!isset($certInfo['subject']['CN'])) {
 					throw new \Exception(
 						sprintf(
 							'App with id %s has a cert with no CN',
@@ -224,7 +224,7 @@ 
 						)
 					);
 				}
-				if($certInfo['subject']['CN'] !== $appId) {
+				if ($certInfo['subject']['CN'] !== $appId) {
 					throw new \Exception(
 						sprintf(
 							'App with id %s has a cert issued to %s',
@@ -241,21 +241,21 @@ 
 
 				// Check if the signature actually matches the downloaded content
 				$certificate = openssl_get_publickey($app['certificate']);
-				$verified = (bool)openssl_verify(file_get_contents($tempFile), base64_decode($app['releases'][0]['signature']), $certificate, OPENSSL_ALGO_SHA512);
+				$verified = (bool) openssl_verify(file_get_contents($tempFile), base64_decode($app['releases'][0]['signature']), $certificate, OPENSSL_ALGO_SHA512);
 				openssl_free_key($certificate);
 
-				if($verified === true) {
+				if ($verified === true) {
 					// Seems to match, let's proceed
 					$extractDir = $this->tempManager->getTemporaryFolder();
 					$archive = new TAR($tempFile);
 
-					if($archive) {
+					if ($archive) {
 						$archive->extract($extractDir);
 						$allFiles = scandir($extractDir);
 						$folders = array_diff($allFiles, ['.', '..']);
 						$folders = array_values($folders);
 
-						if(count($folders) > 1) {
+						if (count($folders) > 1) {
 							throw new \Exception(
 								sprintf(
 									'Extracted app %s has more than 1 folder',
@@ -266,22 +266,22 @@ 
 
 						// Check if appinfo/info.xml has the same app ID as well
 						$loadEntities = libxml_disable_entity_loader(false);
-						$xml = simplexml_load_file($extractDir . '/' . $folders[0] . '/appinfo/info.xml');
+						$xml = simplexml_load_file($extractDir.'/'.$folders[0].'/appinfo/info.xml');
 						libxml_disable_entity_loader($loadEntities);
-						if((string)$xml->id !== $appId) {
+						if ((string) $xml->id !== $appId) {
 							throw new \Exception(
 								sprintf(
 									'App for id %s has a wrong app ID in info.xml: %s',
 									$appId,
-									(string)$xml->id
+									(string) $xml->id
 								)
 							);
 						}
 
 						// Check if the version is lower than before
 						$currentVersion = OC_App::getAppVersion($appId);
-						$newVersion = (string)$xml->version;
-						if(version_compare($currentVersion, $newVersion) === 1) {
+						$newVersion = (string) $xml->version;
+						if (version_compare($currentVersion, $newVersion) === 1) {
 							throw new \Exception(
 								sprintf(
 									'App for id %s has version %s and tried to update to lower version %s',
@@ -292,12 +292,12 @@ 
 							);
 						}
 
-						$baseDir = OC_App::getInstallPath() . '/' . $appId;
+						$baseDir = OC_App::getInstallPath().'/'.$appId;
 						// Remove old app with the ID if existent
 						OC_Helper::rmdirr($baseDir);
 						// Move to app folder
-						if(@mkdir($baseDir)) {
-							$extractDir .= '/' . $folders[0];
+						if (@mkdir($baseDir)) {
+							$extractDir .= '/'.$folders[0];
 							OC_Helper::copyr($extractDir, $baseDir);
 						}
 						OC_Helper::copyr($extractDir, $baseDir);
@@ -357,8 +357,8 @@ 
 		}
 
 		$apps = $appFetcher->get();
-		foreach($apps as $app) {
-			if($app['id'] === $appId) {
+		foreach ($apps as $app) {
+			if ($app['id'] === $appId) {
 				$currentVersion = OC_App::getAppVersion($appId);
 				$newestVersion = $app['releases'][0]['version'];
 				if (version_compare($newestVersion, $currentVersion, '>')) {
@@ -380,7 +380,7 @@ 
 	 * The function will check if the app is already downloaded in the apps repository
 	 */
 	public function isDownloaded($name) {
-		foreach(\OC::$APPSROOTS as $dir) {
+		foreach (\OC::$APPSROOTS as $dir) {
 			$dirToTest  = $dir['path'];
 			$dirToTest .= '/';
 			$dirToTest .= $name;
@@ -408,11 +408,11 @@ 
 	 * this has to be done by the function oc_app_uninstall().
 	 */
 	public function removeApp($appId) {
-		if($this->isDownloaded( $appId )) {
-			$appDir = OC_App::getInstallPath() . '/' . $appId;
+		if ($this->isDownloaded($appId)) {
+			$appDir = OC_App::getInstallPath().'/'.$appId;
 			OC_Helper::rmdirr($appDir);
 			return true;
-		}else{
+		} else {
 			\OCP\Util::writeLog('core', 'can\'t remove app '.$appId.'. It is not installed.', \OCP\Util::ERROR);
 
 			return false;
@@ -430,13 +430,13 @@ 
 	 */
 	public static function installShippedApps($softErrors = false) {
 		$errors = [];
-		foreach(\OC::$APPSROOTS as $app_dir) {
-			if($dir = opendir( $app_dir['path'] )) {
-				while( false !== ( $filename = readdir( $dir ))) {
-					if( substr( $filename, 0, 1 ) != '.' and is_dir($app_dir['path']."/$filename") ) {
-						if( file_exists( $app_dir['path']."/$filename/appinfo/info.xml" )) {
-							if(!Installer::isInstalled($filename)) {
-								$info=OC_App::getAppInfo($filename);
+		foreach (\OC::$APPSROOTS as $app_dir) {
+			if ($dir = opendir($app_dir['path'])) {
+				while (false !== ($filename = readdir($dir))) {
+					if (substr($filename, 0, 1) != '.' and is_dir($app_dir['path']."/$filename")) {
+						if (file_exists($app_dir['path']."/$filename/appinfo/info.xml")) {
+							if (!Installer::isInstalled($filename)) {
+								$info = OC_App::getAppInfo($filename);
 								$enabled = isset($info['default_enable']);
 								if (($enabled || in_array($filename, \OC::$server->getAppManager()->getAlwaysEnabledApps()))
 									  && \OC::$server->getConfig()->getAppValue($filename, 'enabled') !== 'no') {
@@ -459,7 +459,7 @@ 
 						}
 					}
 				}
-				closedir( $dir );
+				closedir($dir);
 			}
 		}
 
@@ -474,12 +474,12 @@ 
 	public static function installShippedApp($app) {
 		//install the database
 		$appPath = OC_App::getAppPath($app);
-		if(is_file("$appPath/appinfo/database.xml")) {
+		if (is_file("$appPath/appinfo/database.xml")) {
 			try {
 				OC_DB::createDbFromStructure("$appPath/appinfo/database.xml");
 			} catch (TableExistsException $e) {
 				throw new HintException(
-					'Failed to enable app ' . $app,
+					'Failed to enable app '.$app,
 					'Please ask for help via one of our <a href="https://nextcloud.com/support/" target="_blank" rel="noreferrer">support channels</a>.',
 					0, $e
 				);
@@ -506,16 +506,16 @@ 
 		}
 
 		//set remote/public handlers
-		foreach($info['remote'] as $name=>$path) {
+		foreach ($info['remote'] as $name=>$path) {
 			$config->setAppValue('core', 'remote_'.$name, $app.'/'.$path);
 		}
-		foreach($info['public'] as $name=>$path) {
+		foreach ($info['public'] as $name=>$path) {
 			$config->setAppValue('core', 'public_'.$name, $app.'/'.$path);
 		}
 
 		OC_App::setAppTypes($info['id']);
 
-		if(isset($info['settings']) && is_array($info['settings'])) {
+		if (isset($info['settings']) && is_array($info['settings'])) {
 			// requires that autoloading was registered for the app,
 			// as happens before running the install.php some lines above
 			\OC::$server->getSettingsManager()->setupSettings($info['settings']);
@@ -531,7 +531,7 @@ 
 	 */
 	public static function checkCode($folder) {
 		// is the code checker enabled?
-		if(!\OC::$server->getConfig()->getSystemValue('appcodechecker', false)) {
+		if (!\OC::$server->getConfig()->getSystemValue('appcodechecker', false)) {
 			return true;
 		}
 
@@ -545,7 +545,7 @@ 
 	 * @param string $script
 	 */
 	private static function includeAppScript($script) {
-		if ( file_exists($script) ){
+		if (file_exists($script)) {
 			include $script;
 		}
 	}

Braces +1 added lines, -1 removed lines

@@ -412,7 +412,7 @@
 			$appDir = OC_App::getInstallPath() . '/' . $appId;
 			OC_Helper::rmdirr($appDir);
 			return true;
-		}else{
+		} else{
 			\OCP\Util::writeLog('core', 'can\'t remove app '.$appId.'. It is not installed.', \OCP\Util::ERROR);
 
 			return false;

apps/dav/lib/HookManager.php

Unused Use Statements -1 removed lines

@@ -28,7 +28,6 @@
 use OCP\IUserManager;
 use OCP\Util;
 use Symfony\Component\EventDispatcher\EventDispatcher;
-use Symfony\Component\EventDispatcher\GenericEvent;
 
 class HookManager {
 

Indentation +111 added lines, -111 removed lines

@@ -32,115 +32,115 @@
 
 class HookManager {
 
-	/** @var IUserManager */
-	private $userManager;
-
-	/** @var SyncService */
-	private $syncService;
-
-	/** @var IUser[] */
-	private $usersToDelete;
-
-	/** @var CalDavBackend */
-	private $calDav;
-
-	/** @var CardDavBackend */
-	private $cardDav;
-
-	/** @var array */
-	private $calendarsToDelete;
-
-	/** @var array */
-	private $addressBooksToDelete;
-
-	/** @var EventDispatcher */
-	private $eventDispatcher;
-
-	public function __construct(IUserManager $userManager,
-								SyncService $syncService,
-								CalDavBackend $calDav,
-								CardDavBackend $cardDav,
-								EventDispatcher $eventDispatcher) {
-		$this->userManager = $userManager;
-		$this->syncService = $syncService;
-		$this->calDav = $calDav;
-		$this->cardDav = $cardDav;
-		$this->eventDispatcher = $eventDispatcher;
-	}
-
-	public function setup() {
-		Util::connectHook('OC_User',
-			'post_createUser',
-			$this,
-			'postCreateUser');
-		Util::connectHook('OC_User',
-			'pre_deleteUser',
-			$this,
-			'preDeleteUser');
-		Util::connectHook('OC_User',
-			'post_deleteUser',
-			$this,
-			'postDeleteUser');
-		Util::connectHook('OC_User',
-			'changeUser',
-			$this,
-			'changeUser');
-	}
-
-	public function postCreateUser($params) {
-		$user = $this->userManager->get($params['uid']);
-		$this->syncService->updateUser($user);
-	}
-
-	public function preDeleteUser($params) {
-		$uid = $params['uid'];
-		$this->usersToDelete[$uid] = $this->userManager->get($uid);
-		$this->calendarsToDelete = $this->calDav->getUsersOwnCalendars('principals/users/' . $uid);
-		$this->addressBooksToDelete = $this->cardDav->getUsersOwnAddressBooks('principals/users/' . $uid);
-	}
-
-	public function postDeleteUser($params) {
-		$uid = $params['uid'];
-		if (isset($this->usersToDelete[$uid])){
-			$this->syncService->deleteUser($this->usersToDelete[$uid]);
-		}
-
-		foreach ($this->calendarsToDelete as $calendar) {
-			$this->calDav->deleteCalendar($calendar['id']);
-		}
-		$this->calDav->deleteAllSharesByUser('principals/users/' . $uid);
-
-		foreach ($this->addressBooksToDelete as $addressBook) {
-			$this->cardDav->deleteAddressBook($addressBook['id']);
-		}
-	}
-
-	public function changeUser($params) {
-		$user = $params['user'];
-		$this->syncService->updateUser($user);
-	}
-
-	public function firstLogin(IUser $user = null) {
-		if (!is_null($user)) {
-			$principal = 'principals/users/' . $user->getUID();
-			if ($this->calDav->getCalendarsForUserCount($principal) === 0) {
-				try {
-					$this->calDav->createCalendar($principal, CalDavBackend::PERSONAL_CALENDAR_URI, [
-						'{DAV:}displayname' => CalDavBackend::PERSONAL_CALENDAR_NAME,
-					]);
-				} catch (\Exception $ex) {
-					\OC::$server->getLogger()->logException($ex);
-				}
-			}
-			if ($this->cardDav->getAddressBooksForUserCount($principal) === 0) {
-				try {
-					$this->cardDav->createAddressBook($principal, CardDavBackend::PERSONAL_ADDRESSBOOK_URI, [
-						'{DAV:}displayname' => CardDavBackend::PERSONAL_ADDRESSBOOK_NAME,
-					]);
-				} catch (\Exception $ex) {
-					\OC::$server->getLogger()->logException($ex);
-				}
-			}
-		}
-	}
+    /** @var IUserManager */
+    private $userManager;
+
+    /** @var SyncService */
+    private $syncService;
+
+    /** @var IUser[] */
+    private $usersToDelete;
+
+    /** @var CalDavBackend */
+    private $calDav;
+
+    /** @var CardDavBackend */
+    private $cardDav;
+
+    /** @var array */
+    private $calendarsToDelete;
+
+    /** @var array */
+    private $addressBooksToDelete;
+
+    /** @var EventDispatcher */
+    private $eventDispatcher;
+
+    public function __construct(IUserManager $userManager,
+                                SyncService $syncService,
+                                CalDavBackend $calDav,
+                                CardDavBackend $cardDav,
+                                EventDispatcher $eventDispatcher) {
+        $this->userManager = $userManager;
+        $this->syncService = $syncService;
+        $this->calDav = $calDav;
+        $this->cardDav = $cardDav;
+        $this->eventDispatcher = $eventDispatcher;
+    }
+
+    public function setup() {
+        Util::connectHook('OC_User',
+            'post_createUser',
+            $this,
+            'postCreateUser');
+        Util::connectHook('OC_User',
+            'pre_deleteUser',
+            $this,
+            'preDeleteUser');
+        Util::connectHook('OC_User',
+            'post_deleteUser',
+            $this,
+            'postDeleteUser');
+        Util::connectHook('OC_User',
+            'changeUser',
+            $this,
+            'changeUser');
+    }
+
+    public function postCreateUser($params) {
+        $user = $this->userManager->get($params['uid']);
+        $this->syncService->updateUser($user);
+    }
+
+    public function preDeleteUser($params) {
+        $uid = $params['uid'];
+        $this->usersToDelete[$uid] = $this->userManager->get($uid);
+        $this->calendarsToDelete = $this->calDav->getUsersOwnCalendars('principals/users/' . $uid);
+        $this->addressBooksToDelete = $this->cardDav->getUsersOwnAddressBooks('principals/users/' . $uid);
+    }
+
+    public function postDeleteUser($params) {
+        $uid = $params['uid'];
+        if (isset($this->usersToDelete[$uid])){
+            $this->syncService->deleteUser($this->usersToDelete[$uid]);
+        }
+
+        foreach ($this->calendarsToDelete as $calendar) {
+            $this->calDav->deleteCalendar($calendar['id']);
+        }
+        $this->calDav->deleteAllSharesByUser('principals/users/' . $uid);
+
+        foreach ($this->addressBooksToDelete as $addressBook) {
+            $this->cardDav->deleteAddressBook($addressBook['id']);
+        }
+    }
+
+    public function changeUser($params) {
+        $user = $params['user'];
+        $this->syncService->updateUser($user);
+    }
+
+    public function firstLogin(IUser $user = null) {
+        if (!is_null($user)) {
+            $principal = 'principals/users/' . $user->getUID();
+            if ($this->calDav->getCalendarsForUserCount($principal) === 0) {
+                try {
+                    $this->calDav->createCalendar($principal, CalDavBackend::PERSONAL_CALENDAR_URI, [
+                        '{DAV:}displayname' => CalDavBackend::PERSONAL_CALENDAR_NAME,
+                    ]);
+                } catch (\Exception $ex) {
+                    \OC::$server->getLogger()->logException($ex);
+                }
+            }
+            if ($this->cardDav->getAddressBooksForUserCount($principal) === 0) {
+                try {
+                    $this->cardDav->createAddressBook($principal, CardDavBackend::PERSONAL_ADDRESSBOOK_URI, [
+                        '{DAV:}displayname' => CardDavBackend::PERSONAL_ADDRESSBOOK_NAME,
+                    ]);
+                } catch (\Exception $ex) {
+                    \OC::$server->getLogger()->logException($ex);
+                }
+            }
+        }
+    }
 }

Spacing +5 added lines, -5 removed lines

@@ -95,20 +95,20 @@ 
 	public function preDeleteUser($params) {
 		$uid = $params['uid'];
 		$this->usersToDelete[$uid] = $this->userManager->get($uid);
-		$this->calendarsToDelete = $this->calDav->getUsersOwnCalendars('principals/users/' . $uid);
-		$this->addressBooksToDelete = $this->cardDav->getUsersOwnAddressBooks('principals/users/' . $uid);
+		$this->calendarsToDelete = $this->calDav->getUsersOwnCalendars('principals/users/'.$uid);
+		$this->addressBooksToDelete = $this->cardDav->getUsersOwnAddressBooks('principals/users/'.$uid);
 	}
 
 	public function postDeleteUser($params) {
 		$uid = $params['uid'];
-		if (isset($this->usersToDelete[$uid])){
+		if (isset($this->usersToDelete[$uid])) {
 			$this->syncService->deleteUser($this->usersToDelete[$uid]);
 		}
 
 		foreach ($this->calendarsToDelete as $calendar) {
 			$this->calDav->deleteCalendar($calendar['id']);
 		}
-		$this->calDav->deleteAllSharesByUser('principals/users/' . $uid);
+		$this->calDav->deleteAllSharesByUser('principals/users/'.$uid);
 
 		foreach ($this->addressBooksToDelete as $addressBook) {
 			$this->cardDav->deleteAddressBook($addressBook['id']);
@@ -122,7 +122,7 @@ 
 
 	public function firstLogin(IUser $user = null) {
 		if (!is_null($user)) {
-			$principal = 'principals/users/' . $user->getUID();
+			$principal = 'principals/users/'.$user->getUID();
 			if ($this->calDav->getCalendarsForUserCount($principal) === 0) {
 				try {
 					$this->calDav->createCalendar($principal, CalDavBackend::PERSONAL_CALENDAR_URI, [

apps/files_sharing/lib/Cache.php

Doc Comments +3 added lines

@@ -110,6 +110,9 @@
 		return parent::moveFromCache($sourceCache, $sourcePath, $targetPath);
 	}
 
+	/**
+	 * @param ICacheEntry $entry
+	 */
 	protected function formatCacheEntry($entry) {
 		$path = isset($entry['path']) ? $entry['path'] : '';
 		$entry = parent::formatCacheEntry($entry);

Unused Use Statements -1 removed lines

@@ -29,7 +29,6 @@
 
 use OC\Files\Cache\Wrapper\CacheJail;
 use OCP\Files\Cache\ICacheEntry;
-use OCP\Files\Storage\IStorage;
 
 /**
  * Metadata cache for shared files

Indentation +99 added lines, -99 removed lines

@@ -37,103 +37,103 @@
  * don't use this class directly if you need to get metadata, use \OC\Files\Filesystem::getFileInfo instead
  */
 class Cache extends CacheJail {
-	/**
-	 * @var \OCA\Files_Sharing\SharedStorage
-	 */
-	private $storage;
-
-	/**
-	 * @var ICacheEntry
-	 */
-	private $sourceRootInfo;
-
-	private $rootUnchanged = true;
-
-	private $ownerDisplayName;
-
-	/**
-	 * @param \OCA\Files_Sharing\SharedStorage $storage
-	 * @param ICacheEntry $sourceRootInfo
-	 */
-	public function __construct($storage, ICacheEntry $sourceRootInfo) {
-		$this->storage = $storage;
-		$this->sourceRootInfo = $sourceRootInfo;
-		parent::__construct(
-			null,
-			$this->sourceRootInfo->getPath()
-		);
-	}
-
-	public function getCache() {
-		if (is_null($this->cache)) {
-			$this->cache = $this->storage->getSourceStorage()->getCache();
-		}
-		return $this->cache;
-	}
-
-	public function getNumericStorageId() {
-		if (isset($this->numericId)) {
-			return $this->numericId;
-		} else {
-			return false;
-		}
-	}
-
-	public function get($file) {
-		if ($this->rootUnchanged && ($file === '' || $file === $this->sourceRootInfo->getId())) {
-			return $this->formatCacheEntry(clone $this->sourceRootInfo);
-		}
-		return parent::get($file);
-	}
-
-	public function update($id, array $data) {
-		$this->rootUnchanged = false;
-		parent::update($id, $data);
-	}
-
-	public function insert($file, array $data) {
-		$this->rootUnchanged = false;
-		return parent::insert($file, $data);
-	}
-
-	public function remove($file) {
-		$this->rootUnchanged = false;
-		parent::remove($file);
-	}
-
-	public function moveFromCache(\OCP\Files\Cache\ICache $sourceCache, $sourcePath, $targetPath) {
-		$this->rootUnchanged = false;
-		return parent::moveFromCache($sourceCache, $sourcePath, $targetPath);
-	}
-
-	protected function formatCacheEntry($entry) {
-		$path = isset($entry['path']) ? $entry['path'] : '';
-		$entry = parent::formatCacheEntry($entry);
-		$sharePermissions = $this->storage->getPermissions($path);
-		if (isset($entry['permissions'])) {
-			$entry['permissions'] &= $sharePermissions;
-		} else {
-			$entry['permissions'] = $sharePermissions;
-		}
-		$entry['uid_owner'] = $this->storage->getOwner($path);
-		$entry['displayname_owner'] = $this->getOwnerDisplayName();
-		if ($path === '') {
-			$entry['is_share_mount_point'] = true;
-		}
-		return $entry;
-	}
-
-	private function getOwnerDisplayName() {
-		if (!$this->ownerDisplayName) {
-			$this->ownerDisplayName = \OC_User::getDisplayName($this->storage->getOwner(''));
-		}
-		return $this->ownerDisplayName;
-	}
-
-	/**
-	 * remove all entries for files that are stored on the storage from the cache
-	 */
-	public function clear() {
-		// Not a valid action for Shared Cache
-	}
+    /**
+     * @var \OCA\Files_Sharing\SharedStorage
+     */
+    private $storage;
+
+    /**
+     * @var ICacheEntry
+     */
+    private $sourceRootInfo;
+
+    private $rootUnchanged = true;
+
+    private $ownerDisplayName;
+
+    /**
+     * @param \OCA\Files_Sharing\SharedStorage $storage
+     * @param ICacheEntry $sourceRootInfo
+     */
+    public function __construct($storage, ICacheEntry $sourceRootInfo) {
+        $this->storage = $storage;
+        $this->sourceRootInfo = $sourceRootInfo;
+        parent::__construct(
+            null,
+            $this->sourceRootInfo->getPath()
+        );
+    }
+
+    public function getCache() {
+        if (is_null($this->cache)) {
+            $this->cache = $this->storage->getSourceStorage()->getCache();
+        }
+        return $this->cache;
+    }
+
+    public function getNumericStorageId() {
+        if (isset($this->numericId)) {
+            return $this->numericId;
+        } else {
+            return false;
+        }
+    }
+
+    public function get($file) {
+        if ($this->rootUnchanged && ($file === '' || $file === $this->sourceRootInfo->getId())) {
+            return $this->formatCacheEntry(clone $this->sourceRootInfo);
+        }
+        return parent::get($file);
+    }
+
+    public function update($id, array $data) {
+        $this->rootUnchanged = false;
+        parent::update($id, $data);
+    }
+
+    public function insert($file, array $data) {
+        $this->rootUnchanged = false;
+        return parent::insert($file, $data);
+    }
+
+    public function remove($file) {
+        $this->rootUnchanged = false;
+        parent::remove($file);
+    }
+
+    public function moveFromCache(\OCP\Files\Cache\ICache $sourceCache, $sourcePath, $targetPath) {
+        $this->rootUnchanged = false;
+        return parent::moveFromCache($sourceCache, $sourcePath, $targetPath);
+    }
+
+    protected function formatCacheEntry($entry) {
+        $path = isset($entry['path']) ? $entry['path'] : '';
+        $entry = parent::formatCacheEntry($entry);
+        $sharePermissions = $this->storage->getPermissions($path);
+        if (isset($entry['permissions'])) {
+            $entry['permissions'] &= $sharePermissions;
+        } else {
+            $entry['permissions'] = $sharePermissions;
+        }
+        $entry['uid_owner'] = $this->storage->getOwner($path);
+        $entry['displayname_owner'] = $this->getOwnerDisplayName();
+        if ($path === '') {
+            $entry['is_share_mount_point'] = true;
+        }
+        return $entry;
+    }
+
+    private function getOwnerDisplayName() {
+        if (!$this->ownerDisplayName) {
+            $this->ownerDisplayName = \OC_User::getDisplayName($this->storage->getOwner(''));
+        }
+        return $this->ownerDisplayName;
+    }
+
+    /**
+     * remove all entries for files that are stored on the storage from the cache
+     */
+    public function clear() {
+        // Not a valid action for Shared Cache
+    }
 }

apps/dav/lib/CalDAV/CalDavBackend.php

Doc Comments +9 added lines, -3 removed lines

@@ -158,7 +158,7 @@ 
 	 *
 	 * By default this excludes the automatically generated birthday calendar
 	 *
-	 * @param $principalUri
+	 * @param string $principalUri
 	 * @param bool $excludeBirthday
 	 * @return int
 	 */
@@ -304,6 +304,9 @@ 
 		return array_values($calendars);
 	}
 
+	/**
+	 * @param string $principalUri
+	 */
 	public function getUsersOwnCalendars($principalUri) {
 		$principalUri = $this->convertPrincipal($principalUri, true);
 		$fields = array_values($this->propertyMap);
@@ -878,7 +881,7 @@ 
 	 * calendar-data. If the result of a subsequent GET to this object is not
 	 * the exact same as this request body, you should omit the ETag.
 	 *
-	 * @param mixed $calendarId
+	 * @param integer $calendarId
 	 * @param string $objectUri
 	 * @param string $calendarData
 	 * @return string
@@ -1370,7 +1373,7 @@ 
 	 * @param string $principalUri
 	 * @param string $uri
 	 * @param array $properties
-	 * @return mixed
+	 * @return integer
 	 */
 	function createSubscription($principalUri, $uri, array $properties) {
 
@@ -1783,6 +1786,9 @@ 
 		return $this->sharingBackend->applyShareAcl($resourceId, $acl);
 	}
 
+	/**
+	 * @param boolean $toV2
+	 */
 	private function convertPrincipal($principalUri, $toV2) {
 		if ($this->principalBackend->getPrincipalPrefix() === 'principals') {
 			list(, $name) = URLUtil::splitPath($principalUri);

Braces +3 added lines, -1 removed lines

@@ -808,7 +808,9 @@
 		$stmt = $query->execute();
 		$row = $stmt->fetch(\PDO::FETCH_ASSOC);
 
-		if(!$row) return null;
+		if(!$row) {
+		    return null;
+		}
 
 		return [
 				'id'            => $row['id'],

Indentation +1751 added lines, -1751 removed lines

@@ -59,1756 +59,1756 @@
  */
 class CalDavBackend extends AbstractBackend implements SyncSupport, SubscriptionSupport, SchedulingSupport {
 
-	const PERSONAL_CALENDAR_URI = 'personal';
-	const PERSONAL_CALENDAR_NAME = 'Personal';
-
-	/**
-	 * We need to specify a max date, because we need to stop *somewhere*
-	 *
-	 * On 32 bit system the maximum for a signed integer is 2147483647, so
-	 * MAX_DATE cannot be higher than date('Y-m-d', 2147483647) which results
-	 * in 2038-01-19 to avoid problems when the date is converted
-	 * to a unix timestamp.
-	 */
-	const MAX_DATE = '2038-01-01';
-
-	const ACCESS_PUBLIC = 4;
-	const CLASSIFICATION_PUBLIC = 0;
-	const CLASSIFICATION_PRIVATE = 1;
-	const CLASSIFICATION_CONFIDENTIAL = 2;
-
-	/**
-	 * List of CalDAV properties, and how they map to database field names
-	 * Add your own properties by simply adding on to this array.
-	 *
-	 * Note that only string-based properties are supported here.
-	 *
-	 * @var array
-	 */
-	public $propertyMap = [
-		'{DAV:}displayname'                          => 'displayname',
-		'{urn:ietf:params:xml:ns:caldav}calendar-description' => 'description',
-		'{urn:ietf:params:xml:ns:caldav}calendar-timezone'    => 'timezone',
-		'{http://apple.com/ns/ical/}calendar-order'  => 'calendarorder',
-		'{http://apple.com/ns/ical/}calendar-color'  => 'calendarcolor',
-	];
-
-	/**
-	 * List of subscription properties, and how they map to database field names.
-	 *
-	 * @var array
-	 */
-	public $subscriptionPropertyMap = [
-		'{DAV:}displayname'                                           => 'displayname',
-		'{http://apple.com/ns/ical/}refreshrate'                      => 'refreshrate',
-		'{http://apple.com/ns/ical/}calendar-order'                   => 'calendarorder',
-		'{http://apple.com/ns/ical/}calendar-color'                   => 'calendarcolor',
-		'{http://calendarserver.org/ns/}subscribed-strip-todos'       => 'striptodos',
-		'{http://calendarserver.org/ns/}subscribed-strip-alarms'      => 'stripalarms',
-		'{http://calendarserver.org/ns/}subscribed-strip-attachments' => 'stripattachments',
-	];
-
-	/**
-	 * @var string[] Map of uid => display name
-	 */
-	protected $userDisplayNames;
-
-	/** @var IDBConnection */
-	private $db;
-
-	/** @var Backend */
-	private $sharingBackend;
-
-	/** @var Principal */
-	private $principalBackend;
-
-	/** @var IUserManager */
-	private $userManager;
-
-	/** @var ISecureRandom */
-	private $random;
-
-	/** @var EventDispatcherInterface */
-	private $dispatcher;
-
-	/** @var bool */
-	private $legacyEndpoint;
-
-	/**
-	 * CalDavBackend constructor.
-	 *
-	 * @param IDBConnection $db
-	 * @param Principal $principalBackend
-	 * @param IUserManager $userManager
-	 * @param ISecureRandom $random
-	 * @param EventDispatcherInterface $dispatcher
-	 * @param bool $legacyEndpoint
-	 */
-	public function __construct(IDBConnection $db,
-								Principal $principalBackend,
-								IUserManager $userManager,
-								ISecureRandom $random,
-								EventDispatcherInterface $dispatcher,
-								$legacyEndpoint = false) {
-		$this->db = $db;
-		$this->principalBackend = $principalBackend;
-		$this->userManager = $userManager;
-		$this->sharingBackend = new Backend($this->db, $principalBackend, 'calendar');
-		$this->random = $random;
-		$this->dispatcher = $dispatcher;
-		$this->legacyEndpoint = $legacyEndpoint;
-	}
-
-	/**
-	 * Return the number of calendars for a principal
-	 *
-	 * By default this excludes the automatically generated birthday calendar
-	 *
-	 * @param $principalUri
-	 * @param bool $excludeBirthday
-	 * @return int
-	 */
-	public function getCalendarsForUserCount($principalUri, $excludeBirthday = true) {
-		$principalUri = $this->convertPrincipal($principalUri, true);
-		$query = $this->db->getQueryBuilder();
-		$query->select($query->createFunction('COUNT(*)'))
-			->from('calendars')
-			->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)));
-
-		if ($excludeBirthday) {
-			$query->andWhere($query->expr()->neq('uri', $query->createNamedParameter(BirthdayService::BIRTHDAY_CALENDAR_URI)));
-		}
-
-		return (int)$query->execute()->fetchColumn();
-	}
-
-	/**
-	 * Returns a list of calendars for a principal.
-	 *
-	 * Every project is an array with the following keys:
-	 *  * id, a unique id that will be used by other functions to modify the
-	 *    calendar. This can be the same as the uri or a database key.
-	 *  * uri, which the basename of the uri with which the calendar is
-	 *    accessed.
-	 *  * principaluri. The owner of the calendar. Almost always the same as
-	 *    principalUri passed to this method.
-	 *
-	 * Furthermore it can contain webdav properties in clark notation. A very
-	 * common one is '{DAV:}displayname'.
-	 *
-	 * Many clients also require:
-	 * {urn:ietf:params:xml:ns:caldav}supported-calendar-component-set
-	 * For this property, you can just return an instance of
-	 * Sabre\CalDAV\Property\SupportedCalendarComponentSet.
-	 *
-	 * If you return {http://sabredav.org/ns}read-only and set the value to 1,
-	 * ACL will automatically be put in read-only mode.
-	 *
-	 * @param string $principalUri
-	 * @return array
-	 */
-	function getCalendarsForUser($principalUri) {
-		$principalUriOriginal = $principalUri;
-		$principalUri = $this->convertPrincipal($principalUri, true);
-		$fields = array_values($this->propertyMap);
-		$fields[] = 'id';
-		$fields[] = 'uri';
-		$fields[] = 'synctoken';
-		$fields[] = 'components';
-		$fields[] = 'principaluri';
-		$fields[] = 'transparent';
-
-		// Making fields a comma-delimited list
-		$query = $this->db->getQueryBuilder();
-		$query->select($fields)->from('calendars')
-				->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
-				->orderBy('calendarorder', 'ASC');
-		$stmt = $query->execute();
-
-		$calendars = [];
-		while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-
-			$components = [];
-			if ($row['components']) {
-				$components = explode(',',$row['components']);
-			}
-
-			$calendar = [
-				'id' => $row['id'],
-				'uri' => $row['uri'],
-				'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-				'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-				'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($principalUri, !$this->legacyEndpoint),
-			];
-
-			foreach($this->propertyMap as $xmlName=>$dbName) {
-				$calendar[$xmlName] = $row[$dbName];
-			}
-
-			if (!isset($calendars[$calendar['id']])) {
-				$calendars[$calendar['id']] = $calendar;
-			}
-		}
-
-		$stmt->closeCursor();
-
-		// query for shared calendars
-		$principals = $this->principalBackend->getGroupMembership($principalUriOriginal, true);
-		$principals[]= $principalUri;
-
-		$fields = array_values($this->propertyMap);
-		$fields[] = 'a.id';
-		$fields[] = 'a.uri';
-		$fields[] = 'a.synctoken';
-		$fields[] = 'a.components';
-		$fields[] = 'a.principaluri';
-		$fields[] = 'a.transparent';
-		$fields[] = 's.access';
-		$query = $this->db->getQueryBuilder();
-		$result = $query->select($fields)
-			->from('dav_shares', 's')
-			->join('s', 'calendars', 'a', $query->expr()->eq('s.resourceid', 'a.id'))
-			->where($query->expr()->in('s.principaluri', $query->createParameter('principaluri')))
-			->andWhere($query->expr()->eq('s.type', $query->createParameter('type')))
-			->setParameter('type', 'calendar')
-			->setParameter('principaluri', $principals, \Doctrine\DBAL\Connection::PARAM_STR_ARRAY)
-			->execute();
-
-		$readOnlyPropertyName = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only';
-		while($row = $result->fetch()) {
-			$readOnly = (int) $row['access'] === Backend::ACCESS_READ;
-			if (isset($calendars[$row['id']])) {
-				if ($readOnly) {
-					// New share can not have more permissions then the old one.
-					continue;
-				}
-				if (isset($calendars[$row['id']][$readOnlyPropertyName]) &&
-					$calendars[$row['id']][$readOnlyPropertyName] === 0) {
-					// Old share is already read-write, no more permissions can be gained
-					continue;
-				}
-			}
-
-			list(, $name) = URLUtil::splitPath($row['principaluri']);
-			$uri = $row['uri'] . '_shared_by_' . $name;
-			$row['displayname'] = $row['displayname'] . ' (' . $this->getUserDisplayName($name) . ')';
-			$components = [];
-			if ($row['components']) {
-				$components = explode(',',$row['components']);
-			}
-			$calendar = [
-				'id' => $row['id'],
-				'uri' => $uri,
-				'principaluri' => $this->convertPrincipal($principalUri, !$this->legacyEndpoint),
-				'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-				'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-				$readOnlyPropertyName => $readOnly,
-			];
-
-			foreach($this->propertyMap as $xmlName=>$dbName) {
-				$calendar[$xmlName] = $row[$dbName];
-			}
-
-			$calendars[$calendar['id']] = $calendar;
-		}
-		$result->closeCursor();
-
-		return array_values($calendars);
-	}
-
-	public function getUsersOwnCalendars($principalUri) {
-		$principalUri = $this->convertPrincipal($principalUri, true);
-		$fields = array_values($this->propertyMap);
-		$fields[] = 'id';
-		$fields[] = 'uri';
-		$fields[] = 'synctoken';
-		$fields[] = 'components';
-		$fields[] = 'principaluri';
-		$fields[] = 'transparent';
-		// Making fields a comma-delimited list
-		$query = $this->db->getQueryBuilder();
-		$query->select($fields)->from('calendars')
-			->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
-			->orderBy('calendarorder', 'ASC');
-		$stmt = $query->execute();
-		$calendars = [];
-		while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-			$components = [];
-			if ($row['components']) {
-				$components = explode(',',$row['components']);
-			}
-			$calendar = [
-				'id' => $row['id'],
-				'uri' => $row['uri'],
-				'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-				'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-				'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-			];
-			foreach($this->propertyMap as $xmlName=>$dbName) {
-				$calendar[$xmlName] = $row[$dbName];
-			}
-			if (!isset($calendars[$calendar['id']])) {
-				$calendars[$calendar['id']] = $calendar;
-			}
-		}
-		$stmt->closeCursor();
-		return array_values($calendars);
-	}
-
-
-	private function getUserDisplayName($uid) {
-		if (!isset($this->userDisplayNames[$uid])) {
-			$user = $this->userManager->get($uid);
-
-			if ($user instanceof IUser) {
-				$this->userDisplayNames[$uid] = $user->getDisplayName();
-			} else {
-				$this->userDisplayNames[$uid] = $uid;
-			}
-		}
-
-		return $this->userDisplayNames[$uid];
-	}
+    const PERSONAL_CALENDAR_URI = 'personal';
+    const PERSONAL_CALENDAR_NAME = 'Personal';
+
+    /**
+     * We need to specify a max date, because we need to stop *somewhere*
+     *
+     * On 32 bit system the maximum for a signed integer is 2147483647, so
+     * MAX_DATE cannot be higher than date('Y-m-d', 2147483647) which results
+     * in 2038-01-19 to avoid problems when the date is converted
+     * to a unix timestamp.
+     */
+    const MAX_DATE = '2038-01-01';
+
+    const ACCESS_PUBLIC = 4;
+    const CLASSIFICATION_PUBLIC = 0;
+    const CLASSIFICATION_PRIVATE = 1;
+    const CLASSIFICATION_CONFIDENTIAL = 2;
+
+    /**
+     * List of CalDAV properties, and how they map to database field names
+     * Add your own properties by simply adding on to this array.
+     *
+     * Note that only string-based properties are supported here.
+     *
+     * @var array
+     */
+    public $propertyMap = [
+        '{DAV:}displayname'                          => 'displayname',
+        '{urn:ietf:params:xml:ns:caldav}calendar-description' => 'description',
+        '{urn:ietf:params:xml:ns:caldav}calendar-timezone'    => 'timezone',
+        '{http://apple.com/ns/ical/}calendar-order'  => 'calendarorder',
+        '{http://apple.com/ns/ical/}calendar-color'  => 'calendarcolor',
+    ];
+
+    /**
+     * List of subscription properties, and how they map to database field names.
+     *
+     * @var array
+     */
+    public $subscriptionPropertyMap = [
+        '{DAV:}displayname'                                           => 'displayname',
+        '{http://apple.com/ns/ical/}refreshrate'                      => 'refreshrate',
+        '{http://apple.com/ns/ical/}calendar-order'                   => 'calendarorder',
+        '{http://apple.com/ns/ical/}calendar-color'                   => 'calendarcolor',
+        '{http://calendarserver.org/ns/}subscribed-strip-todos'       => 'striptodos',
+        '{http://calendarserver.org/ns/}subscribed-strip-alarms'      => 'stripalarms',
+        '{http://calendarserver.org/ns/}subscribed-strip-attachments' => 'stripattachments',
+    ];
+
+    /**
+     * @var string[] Map of uid => display name
+     */
+    protected $userDisplayNames;
+
+    /** @var IDBConnection */
+    private $db;
+
+    /** @var Backend */
+    private $sharingBackend;
+
+    /** @var Principal */
+    private $principalBackend;
+
+    /** @var IUserManager */
+    private $userManager;
+
+    /** @var ISecureRandom */
+    private $random;
+
+    /** @var EventDispatcherInterface */
+    private $dispatcher;
+
+    /** @var bool */
+    private $legacyEndpoint;
+
+    /**
+     * CalDavBackend constructor.
+     *
+     * @param IDBConnection $db
+     * @param Principal $principalBackend
+     * @param IUserManager $userManager
+     * @param ISecureRandom $random
+     * @param EventDispatcherInterface $dispatcher
+     * @param bool $legacyEndpoint
+     */
+    public function __construct(IDBConnection $db,
+                                Principal $principalBackend,
+                                IUserManager $userManager,
+                                ISecureRandom $random,
+                                EventDispatcherInterface $dispatcher,
+                                $legacyEndpoint = false) {
+        $this->db = $db;
+        $this->principalBackend = $principalBackend;
+        $this->userManager = $userManager;
+        $this->sharingBackend = new Backend($this->db, $principalBackend, 'calendar');
+        $this->random = $random;
+        $this->dispatcher = $dispatcher;
+        $this->legacyEndpoint = $legacyEndpoint;
+    }
+
+    /**
+     * Return the number of calendars for a principal
+     *
+     * By default this excludes the automatically generated birthday calendar
+     *
+     * @param $principalUri
+     * @param bool $excludeBirthday
+     * @return int
+     */
+    public function getCalendarsForUserCount($principalUri, $excludeBirthday = true) {
+        $principalUri = $this->convertPrincipal($principalUri, true);
+        $query = $this->db->getQueryBuilder();
+        $query->select($query->createFunction('COUNT(*)'))
+            ->from('calendars')
+            ->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)));
+
+        if ($excludeBirthday) {
+            $query->andWhere($query->expr()->neq('uri', $query->createNamedParameter(BirthdayService::BIRTHDAY_CALENDAR_URI)));
+        }
+
+        return (int)$query->execute()->fetchColumn();
+    }
+
+    /**
+     * Returns a list of calendars for a principal.
+     *
+     * Every project is an array with the following keys:
+     *  * id, a unique id that will be used by other functions to modify the
+     *    calendar. This can be the same as the uri or a database key.
+     *  * uri, which the basename of the uri with which the calendar is
+     *    accessed.
+     *  * principaluri. The owner of the calendar. Almost always the same as
+     *    principalUri passed to this method.
+     *
+     * Furthermore it can contain webdav properties in clark notation. A very
+     * common one is '{DAV:}displayname'.
+     *
+     * Many clients also require:
+     * {urn:ietf:params:xml:ns:caldav}supported-calendar-component-set
+     * For this property, you can just return an instance of
+     * Sabre\CalDAV\Property\SupportedCalendarComponentSet.
+     *
+     * If you return {http://sabredav.org/ns}read-only and set the value to 1,
+     * ACL will automatically be put in read-only mode.
+     *
+     * @param string $principalUri
+     * @return array
+     */
+    function getCalendarsForUser($principalUri) {
+        $principalUriOriginal = $principalUri;
+        $principalUri = $this->convertPrincipal($principalUri, true);
+        $fields = array_values($this->propertyMap);
+        $fields[] = 'id';
+        $fields[] = 'uri';
+        $fields[] = 'synctoken';
+        $fields[] = 'components';
+        $fields[] = 'principaluri';
+        $fields[] = 'transparent';
+
+        // Making fields a comma-delimited list
+        $query = $this->db->getQueryBuilder();
+        $query->select($fields)->from('calendars')
+                ->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
+                ->orderBy('calendarorder', 'ASC');
+        $stmt = $query->execute();
+
+        $calendars = [];
+        while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+
+            $components = [];
+            if ($row['components']) {
+                $components = explode(',',$row['components']);
+            }
+
+            $calendar = [
+                'id' => $row['id'],
+                'uri' => $row['uri'],
+                'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+                '{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
+                '{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+                '{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+                '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+                '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($principalUri, !$this->legacyEndpoint),
+            ];
+
+            foreach($this->propertyMap as $xmlName=>$dbName) {
+                $calendar[$xmlName] = $row[$dbName];
+            }
+
+            if (!isset($calendars[$calendar['id']])) {
+                $calendars[$calendar['id']] = $calendar;
+            }
+        }
+
+        $stmt->closeCursor();
+
+        // query for shared calendars
+        $principals = $this->principalBackend->getGroupMembership($principalUriOriginal, true);
+        $principals[]= $principalUri;
+
+        $fields = array_values($this->propertyMap);
+        $fields[] = 'a.id';
+        $fields[] = 'a.uri';
+        $fields[] = 'a.synctoken';
+        $fields[] = 'a.components';
+        $fields[] = 'a.principaluri';
+        $fields[] = 'a.transparent';
+        $fields[] = 's.access';
+        $query = $this->db->getQueryBuilder();
+        $result = $query->select($fields)
+            ->from('dav_shares', 's')
+            ->join('s', 'calendars', 'a', $query->expr()->eq('s.resourceid', 'a.id'))
+            ->where($query->expr()->in('s.principaluri', $query->createParameter('principaluri')))
+            ->andWhere($query->expr()->eq('s.type', $query->createParameter('type')))
+            ->setParameter('type', 'calendar')
+            ->setParameter('principaluri', $principals, \Doctrine\DBAL\Connection::PARAM_STR_ARRAY)
+            ->execute();
+
+        $readOnlyPropertyName = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only';
+        while($row = $result->fetch()) {
+            $readOnly = (int) $row['access'] === Backend::ACCESS_READ;
+            if (isset($calendars[$row['id']])) {
+                if ($readOnly) {
+                    // New share can not have more permissions then the old one.
+                    continue;
+                }
+                if (isset($calendars[$row['id']][$readOnlyPropertyName]) &&
+                    $calendars[$row['id']][$readOnlyPropertyName] === 0) {
+                    // Old share is already read-write, no more permissions can be gained
+                    continue;
+                }
+            }
+
+            list(, $name) = URLUtil::splitPath($row['principaluri']);
+            $uri = $row['uri'] . '_shared_by_' . $name;
+            $row['displayname'] = $row['displayname'] . ' (' . $this->getUserDisplayName($name) . ')';
+            $components = [];
+            if ($row['components']) {
+                $components = explode(',',$row['components']);
+            }
+            $calendar = [
+                'id' => $row['id'],
+                'uri' => $uri,
+                'principaluri' => $this->convertPrincipal($principalUri, !$this->legacyEndpoint),
+                '{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
+                '{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+                '{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+                '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+                '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+                $readOnlyPropertyName => $readOnly,
+            ];
+
+            foreach($this->propertyMap as $xmlName=>$dbName) {
+                $calendar[$xmlName] = $row[$dbName];
+            }
+
+            $calendars[$calendar['id']] = $calendar;
+        }
+        $result->closeCursor();
+
+        return array_values($calendars);
+    }
+
+    public function getUsersOwnCalendars($principalUri) {
+        $principalUri = $this->convertPrincipal($principalUri, true);
+        $fields = array_values($this->propertyMap);
+        $fields[] = 'id';
+        $fields[] = 'uri';
+        $fields[] = 'synctoken';
+        $fields[] = 'components';
+        $fields[] = 'principaluri';
+        $fields[] = 'transparent';
+        // Making fields a comma-delimited list
+        $query = $this->db->getQueryBuilder();
+        $query->select($fields)->from('calendars')
+            ->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
+            ->orderBy('calendarorder', 'ASC');
+        $stmt = $query->execute();
+        $calendars = [];
+        while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            $components = [];
+            if ($row['components']) {
+                $components = explode(',',$row['components']);
+            }
+            $calendar = [
+                'id' => $row['id'],
+                'uri' => $row['uri'],
+                'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+                '{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
+                '{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+                '{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+                '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+            ];
+            foreach($this->propertyMap as $xmlName=>$dbName) {
+                $calendar[$xmlName] = $row[$dbName];
+            }
+            if (!isset($calendars[$calendar['id']])) {
+                $calendars[$calendar['id']] = $calendar;
+            }
+        }
+        $stmt->closeCursor();
+        return array_values($calendars);
+    }
+
+
+    private function getUserDisplayName($uid) {
+        if (!isset($this->userDisplayNames[$uid])) {
+            $user = $this->userManager->get($uid);
+
+            if ($user instanceof IUser) {
+                $this->userDisplayNames[$uid] = $user->getDisplayName();
+            } else {
+                $this->userDisplayNames[$uid] = $uid;
+            }
+        }
+
+        return $this->userDisplayNames[$uid];
+    }
 	
-	/**
-	 * @return array
-	 */
-	public function getPublicCalendars() {
-		$fields = array_values($this->propertyMap);
-		$fields[] = 'a.id';
-		$fields[] = 'a.uri';
-		$fields[] = 'a.synctoken';
-		$fields[] = 'a.components';
-		$fields[] = 'a.principaluri';
-		$fields[] = 'a.transparent';
-		$fields[] = 's.access';
-		$fields[] = 's.publicuri';
-		$calendars = [];
-		$query = $this->db->getQueryBuilder();
-		$result = $query->select($fields)
-			->from('dav_shares', 's')
-			->join('s', 'calendars', 'a', $query->expr()->eq('s.resourceid', 'a.id'))
-			->where($query->expr()->in('s.access', $query->createNamedParameter(self::ACCESS_PUBLIC)))
-			->andWhere($query->expr()->eq('s.type', $query->createNamedParameter('calendar')))
-			->execute();
-
-		while($row = $result->fetch()) {
-			list(, $name) = URLUtil::splitPath($row['principaluri']);
-			$row['displayname'] = $row['displayname'] . "($name)";
-			$components = [];
-			if ($row['components']) {
-				$components = explode(',',$row['components']);
-			}
-			$calendar = [
-				'id' => $row['id'],
-				'uri' => $row['publicuri'],
-				'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-				'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-				'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], $this->legacyEndpoint),
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only' => (int)$row['access'] === Backend::ACCESS_READ,
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}public' => (int)$row['access'] === self::ACCESS_PUBLIC,
-			];
-
-			foreach($this->propertyMap as $xmlName=>$dbName) {
-				$calendar[$xmlName] = $row[$dbName];
-			}
-
-			if (!isset($calendars[$calendar['id']])) {
-				$calendars[$calendar['id']] = $calendar;
-			}
-		}
-		$result->closeCursor();
-
-		return array_values($calendars);
-	}
-
-	/**
-	 * @param string $uri
-	 * @return array
-	 * @throws NotFound
-	 */
-	public function getPublicCalendar($uri) {
-		$fields = array_values($this->propertyMap);
-		$fields[] = 'a.id';
-		$fields[] = 'a.uri';
-		$fields[] = 'a.synctoken';
-		$fields[] = 'a.components';
-		$fields[] = 'a.principaluri';
-		$fields[] = 'a.transparent';
-		$fields[] = 's.access';
-		$fields[] = 's.publicuri';
-		$query = $this->db->getQueryBuilder();
-		$result = $query->select($fields)
-			->from('dav_shares', 's')
-			->join('s', 'calendars', 'a', $query->expr()->eq('s.resourceid', 'a.id'))
-			->where($query->expr()->in('s.access', $query->createNamedParameter(self::ACCESS_PUBLIC)))
-			->andWhere($query->expr()->eq('s.type', $query->createNamedParameter('calendar')))
-			->andWhere($query->expr()->eq('s.publicuri', $query->createNamedParameter($uri)))
-			->execute();
-
-		$row = $result->fetch(\PDO::FETCH_ASSOC);
-
-		$result->closeCursor();
-
-		if ($row === false) {
-			throw new NotFound('Node with name \'' . $uri . '\' could not be found');
-		}
-
-		list(, $name) = URLUtil::splitPath($row['principaluri']);
-		$row['displayname'] = $row['displayname'] . ' ' . "($name)";
-		$components = [];
-		if ($row['components']) {
-			$components = explode(',',$row['components']);
-		}
-		$calendar = [
-			'id' => $row['id'],
-			'uri' => $row['publicuri'],
-			'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-			'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-			'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-			'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-			'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-			'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-			'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only' => (int)$row['access'] === Backend::ACCESS_READ,
-			'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}public' => (int)$row['access'] === self::ACCESS_PUBLIC,
-		];
-
-		foreach($this->propertyMap as $xmlName=>$dbName) {
-			$calendar[$xmlName] = $row[$dbName];
-		}
-
-		return $calendar;
-
-	}
-
-	/**
-	 * @param string $principal
-	 * @param string $uri
-	 * @return array|null
-	 */
-	public function getCalendarByUri($principal, $uri) {
-		$fields = array_values($this->propertyMap);
-		$fields[] = 'id';
-		$fields[] = 'uri';
-		$fields[] = 'synctoken';
-		$fields[] = 'components';
-		$fields[] = 'principaluri';
-		$fields[] = 'transparent';
-
-		// Making fields a comma-delimited list
-		$query = $this->db->getQueryBuilder();
-		$query->select($fields)->from('calendars')
-			->where($query->expr()->eq('uri', $query->createNamedParameter($uri)))
-			->andWhere($query->expr()->eq('principaluri', $query->createNamedParameter($principal)))
-			->setMaxResults(1);
-		$stmt = $query->execute();
-
-		$row = $stmt->fetch(\PDO::FETCH_ASSOC);
-		$stmt->closeCursor();
-		if ($row === false) {
-			return null;
-		}
-
-		$components = [];
-		if ($row['components']) {
-			$components = explode(',',$row['components']);
-		}
-
-		$calendar = [
-			'id' => $row['id'],
-			'uri' => $row['uri'],
-			'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-			'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-			'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-			'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-			'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-		];
-
-		foreach($this->propertyMap as $xmlName=>$dbName) {
-			$calendar[$xmlName] = $row[$dbName];
-		}
-
-		return $calendar;
-	}
-
-	public function getCalendarById($calendarId) {
-		$fields = array_values($this->propertyMap);
-		$fields[] = 'id';
-		$fields[] = 'uri';
-		$fields[] = 'synctoken';
-		$fields[] = 'components';
-		$fields[] = 'principaluri';
-		$fields[] = 'transparent';
-
-		// Making fields a comma-delimited list
-		$query = $this->db->getQueryBuilder();
-		$query->select($fields)->from('calendars')
-			->where($query->expr()->eq('id', $query->createNamedParameter($calendarId)))
-			->setMaxResults(1);
-		$stmt = $query->execute();
-
-		$row = $stmt->fetch(\PDO::FETCH_ASSOC);
-		$stmt->closeCursor();
-		if ($row === false) {
-			return null;
-		}
-
-		$components = [];
-		if ($row['components']) {
-			$components = explode(',',$row['components']);
-		}
-
-		$calendar = [
-			'id' => $row['id'],
-			'uri' => $row['uri'],
-			'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-			'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-			'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-			'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-			'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-		];
-
-		foreach($this->propertyMap as $xmlName=>$dbName) {
-			$calendar[$xmlName] = $row[$dbName];
-		}
-
-		return $calendar;
-	}
-
-	/**
-	 * Creates a new calendar for a principal.
-	 *
-	 * If the creation was a success, an id must be returned that can be used to reference
-	 * this calendar in other methods, such as updateCalendar.
-	 *
-	 * @param string $principalUri
-	 * @param string $calendarUri
-	 * @param array $properties
-	 * @return int
-	 */
-	function createCalendar($principalUri, $calendarUri, array $properties) {
-		$values = [
-			'principaluri' => $this->convertPrincipal($principalUri, true),
-			'uri'          => $calendarUri,
-			'synctoken'    => 1,
-			'transparent'  => 0,
-			'components'   => 'VEVENT,VTODO',
-			'displayname'  => $calendarUri
-		];
-
-		// Default value
-		$sccs = '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set';
-		if (isset($properties[$sccs])) {
-			if (!($properties[$sccs] instanceof SupportedCalendarComponentSet)) {
-				throw new DAV\Exception('The ' . $sccs . ' property must be of type: \Sabre\CalDAV\Property\SupportedCalendarComponentSet');
-			}
-			$values['components'] = implode(',',$properties[$sccs]->getValue());
-		}
-		$transp = '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp';
-		if (isset($properties[$transp])) {
-			$values['transparent'] = $properties[$transp]->getValue()==='transparent';
-		}
-
-		foreach($this->propertyMap as $xmlName=>$dbName) {
-			if (isset($properties[$xmlName])) {
-				$values[$dbName] = $properties[$xmlName];
-			}
-		}
-
-		$query = $this->db->getQueryBuilder();
-		$query->insert('calendars');
-		foreach($values as $column => $value) {
-			$query->setValue($column, $query->createNamedParameter($value));
-		}
-		$query->execute();
-		$calendarId = $query->getLastInsertId();
-
-		$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCalendar', new GenericEvent(
-			'\OCA\DAV\CalDAV\CalDavBackend::createCalendar',
-			[
-				'calendarId' => $calendarId,
-				'calendarData' => $this->getCalendarById($calendarId),
-		]));
-
-		return $calendarId;
-	}
-
-	/**
-	 * Updates properties for a calendar.
-	 *
-	 * The list of mutations is stored in a Sabre\DAV\PropPatch object.
-	 * To do the actual updates, you must tell this object which properties
-	 * you're going to process with the handle() method.
-	 *
-	 * Calling the handle method is like telling the PropPatch object "I
-	 * promise I can handle updating this property".
-	 *
-	 * Read the PropPatch documentation for more info and examples.
-	 *
-	 * @param PropPatch $propPatch
-	 * @return void
-	 */
-	function updateCalendar($calendarId, PropPatch $propPatch) {
-		$supportedProperties = array_keys($this->propertyMap);
-		$supportedProperties[] = '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp';
-
-		$propPatch->handle($supportedProperties, function($mutations) use ($calendarId) {
-			$newValues = [];
-			foreach ($mutations as $propertyName => $propertyValue) {
-
-				switch ($propertyName) {
-					case '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' :
-						$fieldName = 'transparent';
-						$newValues[$fieldName] = $propertyValue->getValue() === 'transparent';
-						break;
-					default :
-						$fieldName = $this->propertyMap[$propertyName];
-						$newValues[$fieldName] = $propertyValue;
-						break;
-				}
-
-			}
-			$query = $this->db->getQueryBuilder();
-			$query->update('calendars');
-			foreach ($newValues as $fieldName => $value) {
-				$query->set($fieldName, $query->createNamedParameter($value));
-			}
-			$query->where($query->expr()->eq('id', $query->createNamedParameter($calendarId)));
-			$query->execute();
-
-			$this->addChange($calendarId, "", 2);
-
-			$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCalendar', new GenericEvent(
-				'\OCA\DAV\CalDAV\CalDavBackend::updateCalendar',
-				[
-					'calendarId' => $calendarId,
-					'calendarData' => $this->getCalendarById($calendarId),
-					'shares' => $this->getShares($calendarId),
-					'propertyMutations' => $mutations,
-			]));
-
-			return true;
-		});
-	}
-
-	/**
-	 * Delete a calendar and all it's objects
-	 *
-	 * @param mixed $calendarId
-	 * @return void
-	 */
-	function deleteCalendar($calendarId) {
-		$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendar', new GenericEvent(
-			'\OCA\DAV\CalDAV\CalDavBackend::deleteCalendar',
-			[
-				'calendarId' => $calendarId,
-				'calendarData' => $this->getCalendarById($calendarId),
-				'shares' => $this->getShares($calendarId),
-		]));
-
-		$stmt = $this->db->prepare('DELETE FROM `*PREFIX*calendarobjects` WHERE `calendarid` = ?');
-		$stmt->execute([$calendarId]);
-
-		$stmt = $this->db->prepare('DELETE FROM `*PREFIX*calendars` WHERE `id` = ?');
-		$stmt->execute([$calendarId]);
-
-		$stmt = $this->db->prepare('DELETE FROM `*PREFIX*calendarchanges` WHERE `calendarid` = ?');
-		$stmt->execute([$calendarId]);
-
-		$this->sharingBackend->deleteAllShares($calendarId);
-	}
-
-	/**
-	 * Delete all of an user's shares
-	 *
-	 * @param string $principaluri
-	 * @return void
-	 */
-	function deleteAllSharesByUser($principaluri) {
-		$this->sharingBackend->deleteAllSharesByUser($principaluri);
-	}
-
-	/**
-	 * Returns all calendar objects within a calendar.
-	 *
-	 * Every item contains an array with the following keys:
-	 *   * calendardata - The iCalendar-compatible calendar data
-	 *   * uri - a unique key which will be used to construct the uri. This can
-	 *     be any arbitrary string, but making sure it ends with '.ics' is a
-	 *     good idea. This is only the basename, or filename, not the full
-	 *     path.
-	 *   * lastmodified - a timestamp of the last modification time
-	 *   * etag - An arbitrary string, surrounded by double-quotes. (e.g.:
-	 *   '"abcdef"')
-	 *   * size - The size of the calendar objects, in bytes.
-	 *   * component - optional, a string containing the type of object, such
-	 *     as 'vevent' or 'vtodo'. If specified, this will be used to populate
-	 *     the Content-Type header.
-	 *
-	 * Note that the etag is optional, but it's highly encouraged to return for
-	 * speed reasons.
-	 *
-	 * The calendardata is also optional. If it's not returned
-	 * 'getCalendarObject' will be called later, which *is* expected to return
-	 * calendardata.
-	 *
-	 * If neither etag or size are specified, the calendardata will be
-	 * used/fetched to determine these numbers. If both are specified the
-	 * amount of times this is needed is reduced by a great degree.
-	 *
-	 * @param mixed $calendarId
-	 * @return array
-	 */
-	function getCalendarObjects($calendarId) {
-		$query = $this->db->getQueryBuilder();
-		$query->select(['id', 'uri', 'lastmodified', 'etag', 'calendarid', 'size', 'componenttype', 'classification'])
-			->from('calendarobjects')
-			->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)));
-		$stmt = $query->execute();
-
-		$result = [];
-		foreach($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
-			$result[] = [
-					'id'           => $row['id'],
-					'uri'          => $row['uri'],
-					'lastmodified' => $row['lastmodified'],
-					'etag'         => '"' . $row['etag'] . '"',
-					'calendarid'   => $row['calendarid'],
-					'size'         => (int)$row['size'],
-					'component'    => strtolower($row['componenttype']),
-					'classification'=> (int)$row['classification']
-			];
-		}
-
-		return $result;
-	}
-
-	/**
-	 * Returns information from a single calendar object, based on it's object
-	 * uri.
-	 *
-	 * The object uri is only the basename, or filename and not a full path.
-	 *
-	 * The returned array must have the same keys as getCalendarObjects. The
-	 * 'calendardata' object is required here though, while it's not required
-	 * for getCalendarObjects.
-	 *
-	 * This method must return null if the object did not exist.
-	 *
-	 * @param mixed $calendarId
-	 * @param string $objectUri
-	 * @return array|null
-	 */
-	function getCalendarObject($calendarId, $objectUri) {
-
-		$query = $this->db->getQueryBuilder();
-		$query->select(['id', 'uri', 'lastmodified', 'etag', 'calendarid', 'size', 'calendardata', 'componenttype', 'classification'])
-				->from('calendarobjects')
-				->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
-				->andWhere($query->expr()->eq('uri', $query->createNamedParameter($objectUri)));
-		$stmt = $query->execute();
-		$row = $stmt->fetch(\PDO::FETCH_ASSOC);
-
-		if(!$row) return null;
-
-		return [
-				'id'            => $row['id'],
-				'uri'           => $row['uri'],
-				'lastmodified'  => $row['lastmodified'],
-				'etag'          => '"' . $row['etag'] . '"',
-				'calendarid'    => $row['calendarid'],
-				'size'          => (int)$row['size'],
-				'calendardata'  => $this->readBlob($row['calendardata']),
-				'component'     => strtolower($row['componenttype']),
-				'classification'=> (int)$row['classification']
-		];
-	}
-
-	/**
-	 * Returns a list of calendar objects.
-	 *
-	 * This method should work identical to getCalendarObject, but instead
-	 * return all the calendar objects in the list as an array.
-	 *
-	 * If the backend supports this, it may allow for some speed-ups.
-	 *
-	 * @param mixed $calendarId
-	 * @param string[] $uris
-	 * @return array
-	 */
-	function getMultipleCalendarObjects($calendarId, array $uris) {
-		if (empty($uris)) {
-			return [];
-		}
-
-		$chunks = array_chunk($uris, 100);
-		$objects = [];
-
-		$query = $this->db->getQueryBuilder();
-		$query->select(['id', 'uri', 'lastmodified', 'etag', 'calendarid', 'size', 'calendardata', 'componenttype', 'classification'])
-			->from('calendarobjects')
-			->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
-			->andWhere($query->expr()->in('uri', $query->createParameter('uri')));
-
-		foreach ($chunks as $uris) {
-			$query->setParameter('uri', $uris, IQueryBuilder::PARAM_STR_ARRAY);
-			$result = $query->execute();
-
-			while ($row = $result->fetch()) {
-				$objects[] = [
-					'id'           => $row['id'],
-					'uri'          => $row['uri'],
-					'lastmodified' => $row['lastmodified'],
-					'etag'         => '"' . $row['etag'] . '"',
-					'calendarid'   => $row['calendarid'],
-					'size'         => (int)$row['size'],
-					'calendardata' => $this->readBlob($row['calendardata']),
-					'component'    => strtolower($row['componenttype']),
-					'classification' => (int)$row['classification']
-				];
-			}
-			$result->closeCursor();
-		}
-		return $objects;
-	}
-
-	/**
-	 * Creates a new calendar object.
-	 *
-	 * The object uri is only the basename, or filename and not a full path.
-	 *
-	 * It is possible return an etag from this function, which will be used in
-	 * the response to this PUT request. Note that the ETag must be surrounded
-	 * by double-quotes.
-	 *
-	 * However, you should only really return this ETag if you don't mangle the
-	 * calendar-data. If the result of a subsequent GET to this object is not
-	 * the exact same as this request body, you should omit the ETag.
-	 *
-	 * @param mixed $calendarId
-	 * @param string $objectUri
-	 * @param string $calendarData
-	 * @return string
-	 */
-	function createCalendarObject($calendarId, $objectUri, $calendarData) {
-		$extraData = $this->getDenormalizedData($calendarData);
-
-		$query = $this->db->getQueryBuilder();
-		$query->insert('calendarobjects')
-			->values([
-				'calendarid' => $query->createNamedParameter($calendarId),
-				'uri' => $query->createNamedParameter($objectUri),
-				'calendardata' => $query->createNamedParameter($calendarData, IQueryBuilder::PARAM_LOB),
-				'lastmodified' => $query->createNamedParameter(time()),
-				'etag' => $query->createNamedParameter($extraData['etag']),
-				'size' => $query->createNamedParameter($extraData['size']),
-				'componenttype' => $query->createNamedParameter($extraData['componentType']),
-				'firstoccurence' => $query->createNamedParameter($extraData['firstOccurence']),
-				'lastoccurence' => $query->createNamedParameter($extraData['lastOccurence']),
-				'classification' => $query->createNamedParameter($extraData['classification']),
-				'uid' => $query->createNamedParameter($extraData['uid']),
-			])
-			->execute();
-
-		$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject', new GenericEvent(
-			'\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject',
-			[
-				'calendarId' => $calendarId,
-				'calendarData' => $this->getCalendarById($calendarId),
-				'shares' => $this->getShares($calendarId),
-				'objectData' => $this->getCalendarObject($calendarId, $objectUri),
-			]
-		));
-		$this->addChange($calendarId, $objectUri, 1);
-
-		return '"' . $extraData['etag'] . '"';
-	}
-
-	/**
-	 * Updates an existing calendarobject, based on it's uri.
-	 *
-	 * The object uri is only the basename, or filename and not a full path.
-	 *
-	 * It is possible return an etag from this function, which will be used in
-	 * the response to this PUT request. Note that the ETag must be surrounded
-	 * by double-quotes.
-	 *
-	 * However, you should only really return this ETag if you don't mangle the
-	 * calendar-data. If the result of a subsequent GET to this object is not
-	 * the exact same as this request body, you should omit the ETag.
-	 *
-	 * @param mixed $calendarId
-	 * @param string $objectUri
-	 * @param string $calendarData
-	 * @return string
-	 */
-	function updateCalendarObject($calendarId, $objectUri, $calendarData) {
-		$extraData = $this->getDenormalizedData($calendarData);
-
-		$query = $this->db->getQueryBuilder();
-		$query->update('calendarobjects')
-				->set('calendardata', $query->createNamedParameter($calendarData, IQueryBuilder::PARAM_LOB))
-				->set('lastmodified', $query->createNamedParameter(time()))
-				->set('etag', $query->createNamedParameter($extraData['etag']))
-				->set('size', $query->createNamedParameter($extraData['size']))
-				->set('componenttype', $query->createNamedParameter($extraData['componentType']))
-				->set('firstoccurence', $query->createNamedParameter($extraData['firstOccurence']))
-				->set('lastoccurence', $query->createNamedParameter($extraData['lastOccurence']))
-				->set('classification', $query->createNamedParameter($extraData['classification']))
-				->set('uid', $query->createNamedParameter($extraData['uid']))
-			->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
-			->andWhere($query->expr()->eq('uri', $query->createNamedParameter($objectUri)))
-			->execute();
-
-		$data = $this->getCalendarObject($calendarId, $objectUri);
-		if (is_array($data)) {
-			$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCalendarObject', new GenericEvent(
-				'\OCA\DAV\CalDAV\CalDavBackend::updateCalendarObject',
-				[
-					'calendarId' => $calendarId,
-					'calendarData' => $this->getCalendarById($calendarId),
-					'shares' => $this->getShares($calendarId),
-					'objectData' => $data,
-				]
-			));
-		}
-		$this->addChange($calendarId, $objectUri, 2);
-
-		return '"' . $extraData['etag'] . '"';
-	}
-
-	/**
-	 * @param int $calendarObjectId
-	 * @param int $classification
-	 */
-	public function setClassification($calendarObjectId, $classification) {
-		if (!in_array($classification, [
-			self::CLASSIFICATION_PUBLIC, self::CLASSIFICATION_PRIVATE, self::CLASSIFICATION_CONFIDENTIAL
-		])) {
-			throw new \InvalidArgumentException();
-		}
-		$query = $this->db->getQueryBuilder();
-		$query->update('calendarobjects')
-			->set('classification', $query->createNamedParameter($classification))
-			->where($query->expr()->eq('id', $query->createNamedParameter($calendarObjectId)))
-			->execute();
-	}
-
-	/**
-	 * Deletes an existing calendar object.
-	 *
-	 * The object uri is only the basename, or filename and not a full path.
-	 *
-	 * @param mixed $calendarId
-	 * @param string $objectUri
-	 * @return void
-	 */
-	function deleteCalendarObject($calendarId, $objectUri) {
-		$data = $this->getCalendarObject($calendarId, $objectUri);
-		if (is_array($data)) {
-			$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject', new GenericEvent(
-				'\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject',
-				[
-					'calendarId' => $calendarId,
-					'calendarData' => $this->getCalendarById($calendarId),
-					'shares' => $this->getShares($calendarId),
-					'objectData' => $data,
-				]
-			));
-		}
-
-		$stmt = $this->db->prepare('DELETE FROM `*PREFIX*calendarobjects` WHERE `calendarid` = ? AND `uri` = ?');
-		$stmt->execute([$calendarId, $objectUri]);
-
-		$this->addChange($calendarId, $objectUri, 3);
-	}
-
-	/**
-	 * Performs a calendar-query on the contents of this calendar.
-	 *
-	 * The calendar-query is defined in RFC4791 : CalDAV. Using the
-	 * calendar-query it is possible for a client to request a specific set of
-	 * object, based on contents of iCalendar properties, date-ranges and
-	 * iCalendar component types (VTODO, VEVENT).
-	 *
-	 * This method should just return a list of (relative) urls that match this
-	 * query.
-	 *
-	 * The list of filters are specified as an array. The exact array is
-	 * documented by Sabre\CalDAV\CalendarQueryParser.
-	 *
-	 * Note that it is extremely likely that getCalendarObject for every path
-	 * returned from this method will be called almost immediately after. You
-	 * may want to anticipate this to speed up these requests.
-	 *
-	 * This method provides a default implementation, which parses *all* the
-	 * iCalendar objects in the specified calendar.
-	 *
-	 * This default may well be good enough for personal use, and calendars
-	 * that aren't very large. But if you anticipate high usage, big calendars
-	 * or high loads, you are strongly advised to optimize certain paths.
-	 *
-	 * The best way to do so is override this method and to optimize
-	 * specifically for 'common filters'.
-	 *
-	 * Requests that are extremely common are:
-	 *   * requests for just VEVENTS
-	 *   * requests for just VTODO
-	 *   * requests with a time-range-filter on either VEVENT or VTODO.
-	 *
-	 * ..and combinations of these requests. It may not be worth it to try to
-	 * handle every possible situation and just rely on the (relatively
-	 * easy to use) CalendarQueryValidator to handle the rest.
-	 *
-	 * Note that especially time-range-filters may be difficult to parse. A
-	 * time-range filter specified on a VEVENT must for instance also handle
-	 * recurrence rules correctly.
-	 * A good example of how to interprete all these filters can also simply
-	 * be found in Sabre\CalDAV\CalendarQueryFilter. This class is as correct
-	 * as possible, so it gives you a good idea on what type of stuff you need
-	 * to think of.
-	 *
-	 * @param mixed $calendarId
-	 * @param array $filters
-	 * @return array
-	 */
-	function calendarQuery($calendarId, array $filters) {
-		$componentType = null;
-		$requirePostFilter = true;
-		$timeRange = null;
-
-		// if no filters were specified, we don't need to filter after a query
-		if (!$filters['prop-filters'] && !$filters['comp-filters']) {
-			$requirePostFilter = false;
-		}
-
-		// Figuring out if there's a component filter
-		if (count($filters['comp-filters']) > 0 && !$filters['comp-filters'][0]['is-not-defined']) {
-			$componentType = $filters['comp-filters'][0]['name'];
-
-			// Checking if we need post-filters
-			if (!$filters['prop-filters'] && !$filters['comp-filters'][0]['comp-filters'] && !$filters['comp-filters'][0]['time-range'] && !$filters['comp-filters'][0]['prop-filters']) {
-				$requirePostFilter = false;
-			}
-			// There was a time-range filter
-			if ($componentType == 'VEVENT' && isset($filters['comp-filters'][0]['time-range'])) {
-				$timeRange = $filters['comp-filters'][0]['time-range'];
-
-				// If start time OR the end time is not specified, we can do a
-				// 100% accurate mysql query.
-				if (!$filters['prop-filters'] && !$filters['comp-filters'][0]['comp-filters'] && !$filters['comp-filters'][0]['prop-filters'] && (!$timeRange['start'] || !$timeRange['end'])) {
-					$requirePostFilter = false;
-				}
-			}
-
-		}
-		$columns = ['uri'];
-		if ($requirePostFilter) {
-			$columns = ['uri', 'calendardata'];
-		}
-		$query = $this->db->getQueryBuilder();
-		$query->select($columns)
-			->from('calendarobjects')
-			->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)));
-
-		if ($componentType) {
-			$query->andWhere($query->expr()->eq('componenttype', $query->createNamedParameter($componentType)));
-		}
-
-		if ($timeRange && $timeRange['start']) {
-			$query->andWhere($query->expr()->gt('lastoccurence', $query->createNamedParameter($timeRange['start']->getTimeStamp())));
-		}
-		if ($timeRange && $timeRange['end']) {
-			$query->andWhere($query->expr()->lt('firstoccurence', $query->createNamedParameter($timeRange['end']->getTimeStamp())));
-		}
-
-		$stmt = $query->execute();
-
-		$result = [];
-		while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-			if ($requirePostFilter) {
-				if (!$this->validateFilterForObject($row, $filters)) {
-					continue;
-				}
-			}
-			$result[] = $row['uri'];
-		}
-
-		return $result;
-	}
-
-	/**
-	 * Searches through all of a users calendars and calendar objects to find
-	 * an object with a specific UID.
-	 *
-	 * This method should return the path to this object, relative to the
-	 * calendar home, so this path usually only contains two parts:
-	 *
-	 * calendarpath/objectpath.ics
-	 *
-	 * If the uid is not found, return null.
-	 *
-	 * This method should only consider * objects that the principal owns, so
-	 * any calendars owned by other principals that also appear in this
-	 * collection should be ignored.
-	 *
-	 * @param string $principalUri
-	 * @param string $uid
-	 * @return string|null
-	 */
-	function getCalendarObjectByUID($principalUri, $uid) {
-
-		$query = $this->db->getQueryBuilder();
-		$query->selectAlias('c.uri', 'calendaruri')->selectAlias('co.uri', 'objecturi')
-			->from('calendarobjects', 'co')
-			->leftJoin('co', 'calendars', 'c', $query->expr()->eq('co.calendarid', 'c.id'))
-			->where($query->expr()->eq('c.principaluri', $query->createNamedParameter($principalUri)))
-			->andWhere($query->expr()->eq('co.uid', $query->createNamedParameter($uid)));
-
-		$stmt = $query->execute();
-
-		if ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-			return $row['calendaruri'] . '/' . $row['objecturi'];
-		}
-
-		return null;
-	}
-
-	/**
-	 * The getChanges method returns all the changes that have happened, since
-	 * the specified syncToken in the specified calendar.
-	 *
-	 * This function should return an array, such as the following:
-	 *
-	 * [
-	 *   'syncToken' => 'The current synctoken',
-	 *   'added'   => [
-	 *      'new.txt',
-	 *   ],
-	 *   'modified'   => [
-	 *      'modified.txt',
-	 *   ],
-	 *   'deleted' => [
-	 *      'foo.php.bak',
-	 *      'old.txt'
-	 *   ]
-	 * );
-	 *
-	 * The returned syncToken property should reflect the *current* syncToken
-	 * of the calendar, as reported in the {http://sabredav.org/ns}sync-token
-	 * property This is * needed here too, to ensure the operation is atomic.
-	 *
-	 * If the $syncToken argument is specified as null, this is an initial
-	 * sync, and all members should be reported.
-	 *
-	 * The modified property is an array of nodenames that have changed since
-	 * the last token.
-	 *
-	 * The deleted property is an array with nodenames, that have been deleted
-	 * from collection.
-	 *
-	 * The $syncLevel argument is basically the 'depth' of the report. If it's
-	 * 1, you only have to report changes that happened only directly in
-	 * immediate descendants. If it's 2, it should also include changes from
-	 * the nodes below the child collections. (grandchildren)
-	 *
-	 * The $limit argument allows a client to specify how many results should
-	 * be returned at most. If the limit is not specified, it should be treated
-	 * as infinite.
-	 *
-	 * If the limit (infinite or not) is higher than you're willing to return,
-	 * you should throw a Sabre\DAV\Exception\TooMuchMatches() exception.
-	 *
-	 * If the syncToken is expired (due to data cleanup) or unknown, you must
-	 * return null.
-	 *
-	 * The limit is 'suggestive'. You are free to ignore it.
-	 *
-	 * @param string $calendarId
-	 * @param string $syncToken
-	 * @param int $syncLevel
-	 * @param int $limit
-	 * @return array
-	 */
-	function getChangesForCalendar($calendarId, $syncToken, $syncLevel, $limit = null) {
-		// Current synctoken
-		$stmt = $this->db->prepare('SELECT `synctoken` FROM `*PREFIX*calendars` WHERE `id` = ?');
-		$stmt->execute([ $calendarId ]);
-		$currentToken = $stmt->fetchColumn(0);
-
-		if (is_null($currentToken)) {
-			return null;
-		}
-
-		$result = [
-			'syncToken' => $currentToken,
-			'added'     => [],
-			'modified'  => [],
-			'deleted'   => [],
-		];
-
-		if ($syncToken) {
-
-			$query = "SELECT `uri`, `operation` FROM `*PREFIX*calendarchanges` WHERE `synctoken` >= ? AND `synctoken` < ? AND `calendarid` = ? ORDER BY `synctoken`";
-			if ($limit>0) {
-				$query.= " `LIMIT` " . (int)$limit;
-			}
-
-			// Fetching all changes
-			$stmt = $this->db->prepare($query);
-			$stmt->execute([$syncToken, $currentToken, $calendarId]);
-
-			$changes = [];
-
-			// This loop ensures that any duplicates are overwritten, only the
-			// last change on a node is relevant.
-			while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-
-				$changes[$row['uri']] = $row['operation'];
-
-			}
-
-			foreach($changes as $uri => $operation) {
-
-				switch($operation) {
-					case 1 :
-						$result['added'][] = $uri;
-						break;
-					case 2 :
-						$result['modified'][] = $uri;
-						break;
-					case 3 :
-						$result['deleted'][] = $uri;
-						break;
-				}
-
-			}
-		} else {
-			// No synctoken supplied, this is the initial sync.
-			$query = "SELECT `uri` FROM `*PREFIX*calendarobjects` WHERE `calendarid` = ?";
-			$stmt = $this->db->prepare($query);
-			$stmt->execute([$calendarId]);
-
-			$result['added'] = $stmt->fetchAll(\PDO::FETCH_COLUMN);
-		}
-		return $result;
-
-	}
-
-	/**
-	 * Returns a list of subscriptions for a principal.
-	 *
-	 * Every subscription is an array with the following keys:
-	 *  * id, a unique id that will be used by other functions to modify the
-	 *    subscription. This can be the same as the uri or a database key.
-	 *  * uri. This is just the 'base uri' or 'filename' of the subscription.
-	 *  * principaluri. The owner of the subscription. Almost always the same as
-	 *    principalUri passed to this method.
-	 *
-	 * Furthermore, all the subscription info must be returned too:
-	 *
-	 * 1. {DAV:}displayname
-	 * 2. {http://apple.com/ns/ical/}refreshrate
-	 * 3. {http://calendarserver.org/ns/}subscribed-strip-todos (omit if todos
-	 *    should not be stripped).
-	 * 4. {http://calendarserver.org/ns/}subscribed-strip-alarms (omit if alarms
-	 *    should not be stripped).
-	 * 5. {http://calendarserver.org/ns/}subscribed-strip-attachments (omit if
-	 *    attachments should not be stripped).
-	 * 6. {http://calendarserver.org/ns/}source (Must be a
-	 *     Sabre\DAV\Property\Href).
-	 * 7. {http://apple.com/ns/ical/}calendar-color
-	 * 8. {http://apple.com/ns/ical/}calendar-order
-	 * 9. {urn:ietf:params:xml:ns:caldav}supported-calendar-component-set
-	 *    (should just be an instance of
-	 *    Sabre\CalDAV\Property\SupportedCalendarComponentSet, with a bunch of
-	 *    default components).
-	 *
-	 * @param string $principalUri
-	 * @return array
-	 */
-	function getSubscriptionsForUser($principalUri) {
-		$fields = array_values($this->subscriptionPropertyMap);
-		$fields[] = 'id';
-		$fields[] = 'uri';
-		$fields[] = 'source';
-		$fields[] = 'principaluri';
-		$fields[] = 'lastmodified';
-
-		$query = $this->db->getQueryBuilder();
-		$query->select($fields)
-			->from('calendarsubscriptions')
-			->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
-			->orderBy('calendarorder', 'asc');
-		$stmt =$query->execute();
-
-		$subscriptions = [];
-		while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-
-			$subscription = [
-				'id'           => $row['id'],
-				'uri'          => $row['uri'],
-				'principaluri' => $row['principaluri'],
-				'source'       => $row['source'],
-				'lastmodified' => $row['lastmodified'],
-
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet(['VTODO', 'VEVENT']),
-			];
-
-			foreach($this->subscriptionPropertyMap as $xmlName=>$dbName) {
-				if (!is_null($row[$dbName])) {
-					$subscription[$xmlName] = $row[$dbName];
-				}
-			}
-
-			$subscriptions[] = $subscription;
-
-		}
-
-		return $subscriptions;
-	}
-
-	/**
-	 * Creates a new subscription for a principal.
-	 *
-	 * If the creation was a success, an id must be returned that can be used to reference
-	 * this subscription in other methods, such as updateSubscription.
-	 *
-	 * @param string $principalUri
-	 * @param string $uri
-	 * @param array $properties
-	 * @return mixed
-	 */
-	function createSubscription($principalUri, $uri, array $properties) {
-
-		if (!isset($properties['{http://calendarserver.org/ns/}source'])) {
-			throw new Forbidden('The {http://calendarserver.org/ns/}source property is required when creating subscriptions');
-		}
-
-		$values = [
-			'principaluri' => $principalUri,
-			'uri'          => $uri,
-			'source'       => $properties['{http://calendarserver.org/ns/}source']->getHref(),
-			'lastmodified' => time(),
-		];
-
-		$propertiesBoolean = ['striptodos', 'stripalarms', 'stripattachments'];
-
-		foreach($this->subscriptionPropertyMap as $xmlName=>$dbName) {
-			if (array_key_exists($xmlName, $properties)) {
-					$values[$dbName] = $properties[$xmlName];
-					if (in_array($dbName, $propertiesBoolean)) {
-						$values[$dbName] = true;
-				}
-			}
-		}
-
-		$valuesToInsert = array();
-
-		$query = $this->db->getQueryBuilder();
-
-		foreach (array_keys($values) as $name) {
-			$valuesToInsert[$name] = $query->createNamedParameter($values[$name]);
-		}
-
-		$query->insert('calendarsubscriptions')
-			->values($valuesToInsert)
-			->execute();
-
-		return $this->db->lastInsertId('*PREFIX*calendarsubscriptions');
-	}
-
-	/**
-	 * Updates a subscription
-	 *
-	 * The list of mutations is stored in a Sabre\DAV\PropPatch object.
-	 * To do the actual updates, you must tell this object which properties
-	 * you're going to process with the handle() method.
-	 *
-	 * Calling the handle method is like telling the PropPatch object "I
-	 * promise I can handle updating this property".
-	 *
-	 * Read the PropPatch documentation for more info and examples.
-	 *
-	 * @param mixed $subscriptionId
-	 * @param PropPatch $propPatch
-	 * @return void
-	 */
-	function updateSubscription($subscriptionId, PropPatch $propPatch) {
-		$supportedProperties = array_keys($this->subscriptionPropertyMap);
-		$supportedProperties[] = '{http://calendarserver.org/ns/}source';
-
-		$propPatch->handle($supportedProperties, function($mutations) use ($subscriptionId) {
-
-			$newValues = [];
-
-			foreach($mutations as $propertyName=>$propertyValue) {
-				if ($propertyName === '{http://calendarserver.org/ns/}source') {
-					$newValues['source'] = $propertyValue->getHref();
-				} else {
-					$fieldName = $this->subscriptionPropertyMap[$propertyName];
-					$newValues[$fieldName] = $propertyValue;
-				}
-			}
-
-			$query = $this->db->getQueryBuilder();
-			$query->update('calendarsubscriptions')
-				->set('lastmodified', $query->createNamedParameter(time()));
-			foreach($newValues as $fieldName=>$value) {
-				$query->set($fieldName, $query->createNamedParameter($value));
-			}
-			$query->where($query->expr()->eq('id', $query->createNamedParameter($subscriptionId)))
-				->execute();
-
-			return true;
-
-		});
-	}
-
-	/**
-	 * Deletes a subscription.
-	 *
-	 * @param mixed $subscriptionId
-	 * @return void
-	 */
-	function deleteSubscription($subscriptionId) {
-		$query = $this->db->getQueryBuilder();
-		$query->delete('calendarsubscriptions')
-			->where($query->expr()->eq('id', $query->createNamedParameter($subscriptionId)))
-			->execute();
-	}
-
-	/**
-	 * Returns a single scheduling object for the inbox collection.
-	 *
-	 * The returned array should contain the following elements:
-	 *   * uri - A unique basename for the object. This will be used to
-	 *           construct a full uri.
-	 *   * calendardata - The iCalendar object
-	 *   * lastmodified - The last modification date. Can be an int for a unix
-	 *                    timestamp, or a PHP DateTime object.
-	 *   * etag - A unique token that must change if the object changed.
-	 *   * size - The size of the object, in bytes.
-	 *
-	 * @param string $principalUri
-	 * @param string $objectUri
-	 * @return array
-	 */
-	function getSchedulingObject($principalUri, $objectUri) {
-		$query = $this->db->getQueryBuilder();
-		$stmt = $query->select(['uri', 'calendardata', 'lastmodified', 'etag', 'size'])
-			->from('schedulingobjects')
-			->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
-			->andWhere($query->expr()->eq('uri', $query->createNamedParameter($objectUri)))
-			->execute();
-
-		$row = $stmt->fetch(\PDO::FETCH_ASSOC);
-
-		if(!$row) {
-			return null;
-		}
-
-		return [
-				'uri'          => $row['uri'],
-				'calendardata' => $row['calendardata'],
-				'lastmodified' => $row['lastmodified'],
-				'etag'         => '"' . $row['etag'] . '"',
-				'size'         => (int)$row['size'],
-		];
-	}
-
-	/**
-	 * Returns all scheduling objects for the inbox collection.
-	 *
-	 * These objects should be returned as an array. Every item in the array
-	 * should follow the same structure as returned from getSchedulingObject.
-	 *
-	 * The main difference is that 'calendardata' is optional.
-	 *
-	 * @param string $principalUri
-	 * @return array
-	 */
-	function getSchedulingObjects($principalUri) {
-		$query = $this->db->getQueryBuilder();
-		$stmt = $query->select(['uri', 'calendardata', 'lastmodified', 'etag', 'size'])
-				->from('schedulingobjects')
-				->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
-				->execute();
-
-		$result = [];
-		foreach($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
-			$result[] = [
-					'calendardata' => $row['calendardata'],
-					'uri'          => $row['uri'],
-					'lastmodified' => $row['lastmodified'],
-					'etag'         => '"' . $row['etag'] . '"',
-					'size'         => (int)$row['size'],
-			];
-		}
-
-		return $result;
-	}
-
-	/**
-	 * Deletes a scheduling object from the inbox collection.
-	 *
-	 * @param string $principalUri
-	 * @param string $objectUri
-	 * @return void
-	 */
-	function deleteSchedulingObject($principalUri, $objectUri) {
-		$query = $this->db->getQueryBuilder();
-		$query->delete('schedulingobjects')
-				->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
-				->andWhere($query->expr()->eq('uri', $query->createNamedParameter($objectUri)))
-				->execute();
-	}
-
-	/**
-	 * Creates a new scheduling object. This should land in a users' inbox.
-	 *
-	 * @param string $principalUri
-	 * @param string $objectUri
-	 * @param string $objectData
-	 * @return void
-	 */
-	function createSchedulingObject($principalUri, $objectUri, $objectData) {
-		$query = $this->db->getQueryBuilder();
-		$query->insert('schedulingobjects')
-			->values([
-				'principaluri' => $query->createNamedParameter($principalUri),
-				'calendardata' => $query->createNamedParameter($objectData),
-				'uri' => $query->createNamedParameter($objectUri),
-				'lastmodified' => $query->createNamedParameter(time()),
-				'etag' => $query->createNamedParameter(md5($objectData)),
-				'size' => $query->createNamedParameter(strlen($objectData))
-			])
-			->execute();
-	}
-
-	/**
-	 * Adds a change record to the calendarchanges table.
-	 *
-	 * @param mixed $calendarId
-	 * @param string $objectUri
-	 * @param int $operation 1 = add, 2 = modify, 3 = delete.
-	 * @return void
-	 */
-	protected function addChange($calendarId, $objectUri, $operation) {
-
-		$stmt = $this->db->prepare('INSERT INTO `*PREFIX*calendarchanges` (`uri`, `synctoken`, `calendarid`, `operation`) SELECT ?, `synctoken`, ?, ? FROM `*PREFIX*calendars` WHERE `id` = ?');
-		$stmt->execute([
-			$objectUri,
-			$calendarId,
-			$operation,
-			$calendarId
-		]);
-		$stmt = $this->db->prepare('UPDATE `*PREFIX*calendars` SET `synctoken` = `synctoken` + 1 WHERE `id` = ?');
-		$stmt->execute([
-			$calendarId
-		]);
-
-	}
-
-	/**
-	 * Parses some information from calendar objects, used for optimized
-	 * calendar-queries.
-	 *
-	 * Returns an array with the following keys:
-	 *   * etag - An md5 checksum of the object without the quotes.
-	 *   * size - Size of the object in bytes
-	 *   * componentType - VEVENT, VTODO or VJOURNAL
-	 *   * firstOccurence
-	 *   * lastOccurence
-	 *   * uid - value of the UID property
-	 *
-	 * @param string $calendarData
-	 * @return array
-	 */
-	public function getDenormalizedData($calendarData) {
-
-		$vObject = Reader::read($calendarData);
-		$componentType = null;
-		$component = null;
-		$firstOccurrence = null;
-		$lastOccurrence = null;
-		$uid = null;
-		$classification = self::CLASSIFICATION_PUBLIC;
-		foreach($vObject->getComponents() as $component) {
-			if ($component->name!=='VTIMEZONE') {
-				$componentType = $component->name;
-				$uid = (string)$component->UID;
-				break;
-			}
-		}
-		if (!$componentType) {
-			throw new \Sabre\DAV\Exception\BadRequest('Calendar objects must have a VJOURNAL, VEVENT or VTODO component');
-		}
-		if ($componentType === 'VEVENT' && $component->DTSTART) {
-			$firstOccurrence = $component->DTSTART->getDateTime()->getTimeStamp();
-			// Finding the last occurrence is a bit harder
-			if (!isset($component->RRULE)) {
-				if (isset($component->DTEND)) {
-					$lastOccurrence = $component->DTEND->getDateTime()->getTimeStamp();
-				} elseif (isset($component->DURATION)) {
-					$endDate = clone $component->DTSTART->getDateTime();
-					$endDate->add(DateTimeParser::parse($component->DURATION->getValue()));
-					$lastOccurrence = $endDate->getTimeStamp();
-				} elseif (!$component->DTSTART->hasTime()) {
-					$endDate = clone $component->DTSTART->getDateTime();
-					$endDate->modify('+1 day');
-					$lastOccurrence = $endDate->getTimeStamp();
-				} else {
-					$lastOccurrence = $firstOccurrence;
-				}
-			} else {
-				$it = new EventIterator($vObject, (string)$component->UID);
-				$maxDate = new \DateTime(self::MAX_DATE);
-				if ($it->isInfinite()) {
-					$lastOccurrence = $maxDate->getTimestamp();
-				} else {
-					$end = $it->getDtEnd();
-					while($it->valid() && $end < $maxDate) {
-						$end = $it->getDtEnd();
-						$it->next();
-
-					}
-					$lastOccurrence = $end->getTimestamp();
-				}
-
-			}
-		}
-
-		if ($component->CLASS) {
-			$classification = CalDavBackend::CLASSIFICATION_PRIVATE;
-			switch ($component->CLASS->getValue()) {
-				case 'PUBLIC':
-					$classification = CalDavBackend::CLASSIFICATION_PUBLIC;
-					break;
-				case 'CONFIDENTIAL':
-					$classification = CalDavBackend::CLASSIFICATION_CONFIDENTIAL;
-					break;
-			}
-		}
-		return [
-			'etag' => md5($calendarData),
-			'size' => strlen($calendarData),
-			'componentType' => $componentType,
-			'firstOccurence' => is_null($firstOccurrence) ? null : max(0, $firstOccurrence),
-			'lastOccurence'  => $lastOccurrence,
-			'uid' => $uid,
-			'classification' => $classification
-		];
-
-	}
-
-	private function readBlob($cardData) {
-		if (is_resource($cardData)) {
-			return stream_get_contents($cardData);
-		}
-
-		return $cardData;
-	}
-
-	/**
-	 * @param IShareable $shareable
-	 * @param array $add
-	 * @param array $remove
-	 */
-	public function updateShares($shareable, $add, $remove) {
-		$calendarId = $shareable->getResourceId();
-		$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateShares', new GenericEvent(
-			'\OCA\DAV\CalDAV\CalDavBackend::updateShares',
-			[
-				'calendarId' => $calendarId,
-				'calendarData' => $this->getCalendarById($calendarId),
-				'shares' => $this->getShares($calendarId),
-				'add' => $add,
-				'remove' => $remove,
-			]));
-		$this->sharingBackend->updateShares($shareable, $add, $remove);
-	}
-
-	/**
-	 * @param int $resourceId
-	 * @return array
-	 */
-	public function getShares($resourceId) {
-		return $this->sharingBackend->getShares($resourceId);
-	}
-
-	/**
-	 * @param boolean $value
-	 * @param \OCA\DAV\CalDAV\Calendar $calendar
-	 * @return string|null
-	 */
-	public function setPublishStatus($value, $calendar) {
-		$query = $this->db->getQueryBuilder();
-		if ($value) {
-			$publicUri = $this->random->generate(16, ISecureRandom::CHAR_UPPER.ISecureRandom::CHAR_DIGITS);
-			$query->insert('dav_shares')
-				->values([
-					'principaluri' => $query->createNamedParameter($calendar->getPrincipalURI()),
-					'type' => $query->createNamedParameter('calendar'),
-					'access' => $query->createNamedParameter(self::ACCESS_PUBLIC),
-					'resourceid' => $query->createNamedParameter($calendar->getResourceId()),
-					'publicuri' => $query->createNamedParameter($publicUri)
-				]);
-			$query->execute();
-			return $publicUri;
-		}
-		$query->delete('dav_shares')
-			->where($query->expr()->eq('resourceid', $query->createNamedParameter($calendar->getResourceId())))
-			->andWhere($query->expr()->eq('access', $query->createNamedParameter(self::ACCESS_PUBLIC)));
-		$query->execute();
-		return null;
-	}
-
-	/**
-	 * @param \OCA\DAV\CalDAV\Calendar $calendar
-	 * @return mixed
-	 */
-	public function getPublishStatus($calendar) {
-		$query = $this->db->getQueryBuilder();
-		$result = $query->select('publicuri')
-			->from('dav_shares')
-			->where($query->expr()->eq('resourceid', $query->createNamedParameter($calendar->getResourceId())))
-			->andWhere($query->expr()->eq('access', $query->createNamedParameter(self::ACCESS_PUBLIC)))
-			->execute();
-
-		$row = $result->fetch();
-		$result->closeCursor();
-		return $row ? reset($row) : false;
-	}
-
-	/**
-	 * @param int $resourceId
-	 * @param array $acl
-	 * @return array
-	 */
-	public function applyShareAcl($resourceId, $acl) {
-		return $this->sharingBackend->applyShareAcl($resourceId, $acl);
-	}
-
-	private function convertPrincipal($principalUri, $toV2) {
-		if ($this->principalBackend->getPrincipalPrefix() === 'principals') {
-			list(, $name) = URLUtil::splitPath($principalUri);
-			if ($toV2 === true) {
-				return "principals/users/$name";
-			}
-			return "principals/$name";
-		}
-		return $principalUri;
-	}
+    /**
+     * @return array
+     */
+    public function getPublicCalendars() {
+        $fields = array_values($this->propertyMap);
+        $fields[] = 'a.id';
+        $fields[] = 'a.uri';
+        $fields[] = 'a.synctoken';
+        $fields[] = 'a.components';
+        $fields[] = 'a.principaluri';
+        $fields[] = 'a.transparent';
+        $fields[] = 's.access';
+        $fields[] = 's.publicuri';
+        $calendars = [];
+        $query = $this->db->getQueryBuilder();
+        $result = $query->select($fields)
+            ->from('dav_shares', 's')
+            ->join('s', 'calendars', 'a', $query->expr()->eq('s.resourceid', 'a.id'))
+            ->where($query->expr()->in('s.access', $query->createNamedParameter(self::ACCESS_PUBLIC)))
+            ->andWhere($query->expr()->eq('s.type', $query->createNamedParameter('calendar')))
+            ->execute();
+
+        while($row = $result->fetch()) {
+            list(, $name) = URLUtil::splitPath($row['principaluri']);
+            $row['displayname'] = $row['displayname'] . "($name)";
+            $components = [];
+            if ($row['components']) {
+                $components = explode(',',$row['components']);
+            }
+            $calendar = [
+                'id' => $row['id'],
+                'uri' => $row['publicuri'],
+                'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+                '{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
+                '{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+                '{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+                '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+                '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], $this->legacyEndpoint),
+                '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only' => (int)$row['access'] === Backend::ACCESS_READ,
+                '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}public' => (int)$row['access'] === self::ACCESS_PUBLIC,
+            ];
+
+            foreach($this->propertyMap as $xmlName=>$dbName) {
+                $calendar[$xmlName] = $row[$dbName];
+            }
+
+            if (!isset($calendars[$calendar['id']])) {
+                $calendars[$calendar['id']] = $calendar;
+            }
+        }
+        $result->closeCursor();
+
+        return array_values($calendars);
+    }
+
+    /**
+     * @param string $uri
+     * @return array
+     * @throws NotFound
+     */
+    public function getPublicCalendar($uri) {
+        $fields = array_values($this->propertyMap);
+        $fields[] = 'a.id';
+        $fields[] = 'a.uri';
+        $fields[] = 'a.synctoken';
+        $fields[] = 'a.components';
+        $fields[] = 'a.principaluri';
+        $fields[] = 'a.transparent';
+        $fields[] = 's.access';
+        $fields[] = 's.publicuri';
+        $query = $this->db->getQueryBuilder();
+        $result = $query->select($fields)
+            ->from('dav_shares', 's')
+            ->join('s', 'calendars', 'a', $query->expr()->eq('s.resourceid', 'a.id'))
+            ->where($query->expr()->in('s.access', $query->createNamedParameter(self::ACCESS_PUBLIC)))
+            ->andWhere($query->expr()->eq('s.type', $query->createNamedParameter('calendar')))
+            ->andWhere($query->expr()->eq('s.publicuri', $query->createNamedParameter($uri)))
+            ->execute();
+
+        $row = $result->fetch(\PDO::FETCH_ASSOC);
+
+        $result->closeCursor();
+
+        if ($row === false) {
+            throw new NotFound('Node with name \'' . $uri . '\' could not be found');
+        }
+
+        list(, $name) = URLUtil::splitPath($row['principaluri']);
+        $row['displayname'] = $row['displayname'] . ' ' . "($name)";
+        $components = [];
+        if ($row['components']) {
+            $components = explode(',',$row['components']);
+        }
+        $calendar = [
+            'id' => $row['id'],
+            'uri' => $row['publicuri'],
+            'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+            '{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
+            '{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+            '{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+            '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+            '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+            '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only' => (int)$row['access'] === Backend::ACCESS_READ,
+            '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}public' => (int)$row['access'] === self::ACCESS_PUBLIC,
+        ];
+
+        foreach($this->propertyMap as $xmlName=>$dbName) {
+            $calendar[$xmlName] = $row[$dbName];
+        }
+
+        return $calendar;
+
+    }
+
+    /**
+     * @param string $principal
+     * @param string $uri
+     * @return array|null
+     */
+    public function getCalendarByUri($principal, $uri) {
+        $fields = array_values($this->propertyMap);
+        $fields[] = 'id';
+        $fields[] = 'uri';
+        $fields[] = 'synctoken';
+        $fields[] = 'components';
+        $fields[] = 'principaluri';
+        $fields[] = 'transparent';
+
+        // Making fields a comma-delimited list
+        $query = $this->db->getQueryBuilder();
+        $query->select($fields)->from('calendars')
+            ->where($query->expr()->eq('uri', $query->createNamedParameter($uri)))
+            ->andWhere($query->expr()->eq('principaluri', $query->createNamedParameter($principal)))
+            ->setMaxResults(1);
+        $stmt = $query->execute();
+
+        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
+        $stmt->closeCursor();
+        if ($row === false) {
+            return null;
+        }
+
+        $components = [];
+        if ($row['components']) {
+            $components = explode(',',$row['components']);
+        }
+
+        $calendar = [
+            'id' => $row['id'],
+            'uri' => $row['uri'],
+            'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+            '{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
+            '{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+            '{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+            '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+        ];
+
+        foreach($this->propertyMap as $xmlName=>$dbName) {
+            $calendar[$xmlName] = $row[$dbName];
+        }
+
+        return $calendar;
+    }
+
+    public function getCalendarById($calendarId) {
+        $fields = array_values($this->propertyMap);
+        $fields[] = 'id';
+        $fields[] = 'uri';
+        $fields[] = 'synctoken';
+        $fields[] = 'components';
+        $fields[] = 'principaluri';
+        $fields[] = 'transparent';
+
+        // Making fields a comma-delimited list
+        $query = $this->db->getQueryBuilder();
+        $query->select($fields)->from('calendars')
+            ->where($query->expr()->eq('id', $query->createNamedParameter($calendarId)))
+            ->setMaxResults(1);
+        $stmt = $query->execute();
+
+        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
+        $stmt->closeCursor();
+        if ($row === false) {
+            return null;
+        }
+
+        $components = [];
+        if ($row['components']) {
+            $components = explode(',',$row['components']);
+        }
+
+        $calendar = [
+            'id' => $row['id'],
+            'uri' => $row['uri'],
+            'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+            '{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
+            '{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+            '{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+            '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+        ];
+
+        foreach($this->propertyMap as $xmlName=>$dbName) {
+            $calendar[$xmlName] = $row[$dbName];
+        }
+
+        return $calendar;
+    }
+
+    /**
+     * Creates a new calendar for a principal.
+     *
+     * If the creation was a success, an id must be returned that can be used to reference
+     * this calendar in other methods, such as updateCalendar.
+     *
+     * @param string $principalUri
+     * @param string $calendarUri
+     * @param array $properties
+     * @return int
+     */
+    function createCalendar($principalUri, $calendarUri, array $properties) {
+        $values = [
+            'principaluri' => $this->convertPrincipal($principalUri, true),
+            'uri'          => $calendarUri,
+            'synctoken'    => 1,
+            'transparent'  => 0,
+            'components'   => 'VEVENT,VTODO',
+            'displayname'  => $calendarUri
+        ];
+
+        // Default value
+        $sccs = '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set';
+        if (isset($properties[$sccs])) {
+            if (!($properties[$sccs] instanceof SupportedCalendarComponentSet)) {
+                throw new DAV\Exception('The ' . $sccs . ' property must be of type: \Sabre\CalDAV\Property\SupportedCalendarComponentSet');
+            }
+            $values['components'] = implode(',',$properties[$sccs]->getValue());
+        }
+        $transp = '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp';
+        if (isset($properties[$transp])) {
+            $values['transparent'] = $properties[$transp]->getValue()==='transparent';
+        }
+
+        foreach($this->propertyMap as $xmlName=>$dbName) {
+            if (isset($properties[$xmlName])) {
+                $values[$dbName] = $properties[$xmlName];
+            }
+        }
+
+        $query = $this->db->getQueryBuilder();
+        $query->insert('calendars');
+        foreach($values as $column => $value) {
+            $query->setValue($column, $query->createNamedParameter($value));
+        }
+        $query->execute();
+        $calendarId = $query->getLastInsertId();
+
+        $this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCalendar', new GenericEvent(
+            '\OCA\DAV\CalDAV\CalDavBackend::createCalendar',
+            [
+                'calendarId' => $calendarId,
+                'calendarData' => $this->getCalendarById($calendarId),
+        ]));
+
+        return $calendarId;
+    }
+
+    /**
+     * Updates properties for a calendar.
+     *
+     * The list of mutations is stored in a Sabre\DAV\PropPatch object.
+     * To do the actual updates, you must tell this object which properties
+     * you're going to process with the handle() method.
+     *
+     * Calling the handle method is like telling the PropPatch object "I
+     * promise I can handle updating this property".
+     *
+     * Read the PropPatch documentation for more info and examples.
+     *
+     * @param PropPatch $propPatch
+     * @return void
+     */
+    function updateCalendar($calendarId, PropPatch $propPatch) {
+        $supportedProperties = array_keys($this->propertyMap);
+        $supportedProperties[] = '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp';
+
+        $propPatch->handle($supportedProperties, function($mutations) use ($calendarId) {
+            $newValues = [];
+            foreach ($mutations as $propertyName => $propertyValue) {
+
+                switch ($propertyName) {
+                    case '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' :
+                        $fieldName = 'transparent';
+                        $newValues[$fieldName] = $propertyValue->getValue() === 'transparent';
+                        break;
+                    default :
+                        $fieldName = $this->propertyMap[$propertyName];
+                        $newValues[$fieldName] = $propertyValue;
+                        break;
+                }
+
+            }
+            $query = $this->db->getQueryBuilder();
+            $query->update('calendars');
+            foreach ($newValues as $fieldName => $value) {
+                $query->set($fieldName, $query->createNamedParameter($value));
+            }
+            $query->where($query->expr()->eq('id', $query->createNamedParameter($calendarId)));
+            $query->execute();
+
+            $this->addChange($calendarId, "", 2);
+
+            $this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCalendar', new GenericEvent(
+                '\OCA\DAV\CalDAV\CalDavBackend::updateCalendar',
+                [
+                    'calendarId' => $calendarId,
+                    'calendarData' => $this->getCalendarById($calendarId),
+                    'shares' => $this->getShares($calendarId),
+                    'propertyMutations' => $mutations,
+            ]));
+
+            return true;
+        });
+    }
+
+    /**
+     * Delete a calendar and all it's objects
+     *
+     * @param mixed $calendarId
+     * @return void
+     */
+    function deleteCalendar($calendarId) {
+        $this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendar', new GenericEvent(
+            '\OCA\DAV\CalDAV\CalDavBackend::deleteCalendar',
+            [
+                'calendarId' => $calendarId,
+                'calendarData' => $this->getCalendarById($calendarId),
+                'shares' => $this->getShares($calendarId),
+        ]));
+
+        $stmt = $this->db->prepare('DELETE FROM `*PREFIX*calendarobjects` WHERE `calendarid` = ?');
+        $stmt->execute([$calendarId]);
+
+        $stmt = $this->db->prepare('DELETE FROM `*PREFIX*calendars` WHERE `id` = ?');
+        $stmt->execute([$calendarId]);
+
+        $stmt = $this->db->prepare('DELETE FROM `*PREFIX*calendarchanges` WHERE `calendarid` = ?');
+        $stmt->execute([$calendarId]);
+
+        $this->sharingBackend->deleteAllShares($calendarId);
+    }
+
+    /**
+     * Delete all of an user's shares
+     *
+     * @param string $principaluri
+     * @return void
+     */
+    function deleteAllSharesByUser($principaluri) {
+        $this->sharingBackend->deleteAllSharesByUser($principaluri);
+    }
+
+    /**
+     * Returns all calendar objects within a calendar.
+     *
+     * Every item contains an array with the following keys:
+     *   * calendardata - The iCalendar-compatible calendar data
+     *   * uri - a unique key which will be used to construct the uri. This can
+     *     be any arbitrary string, but making sure it ends with '.ics' is a
+     *     good idea. This is only the basename, or filename, not the full
+     *     path.
+     *   * lastmodified - a timestamp of the last modification time
+     *   * etag - An arbitrary string, surrounded by double-quotes. (e.g.:
+     *   '"abcdef"')
+     *   * size - The size of the calendar objects, in bytes.
+     *   * component - optional, a string containing the type of object, such
+     *     as 'vevent' or 'vtodo'. If specified, this will be used to populate
+     *     the Content-Type header.
+     *
+     * Note that the etag is optional, but it's highly encouraged to return for
+     * speed reasons.
+     *
+     * The calendardata is also optional. If it's not returned
+     * 'getCalendarObject' will be called later, which *is* expected to return
+     * calendardata.
+     *
+     * If neither etag or size are specified, the calendardata will be
+     * used/fetched to determine these numbers. If both are specified the
+     * amount of times this is needed is reduced by a great degree.
+     *
+     * @param mixed $calendarId
+     * @return array
+     */
+    function getCalendarObjects($calendarId) {
+        $query = $this->db->getQueryBuilder();
+        $query->select(['id', 'uri', 'lastmodified', 'etag', 'calendarid', 'size', 'componenttype', 'classification'])
+            ->from('calendarobjects')
+            ->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)));
+        $stmt = $query->execute();
+
+        $result = [];
+        foreach($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
+            $result[] = [
+                    'id'           => $row['id'],
+                    'uri'          => $row['uri'],
+                    'lastmodified' => $row['lastmodified'],
+                    'etag'         => '"' . $row['etag'] . '"',
+                    'calendarid'   => $row['calendarid'],
+                    'size'         => (int)$row['size'],
+                    'component'    => strtolower($row['componenttype']),
+                    'classification'=> (int)$row['classification']
+            ];
+        }
+
+        return $result;
+    }
+
+    /**
+     * Returns information from a single calendar object, based on it's object
+     * uri.
+     *
+     * The object uri is only the basename, or filename and not a full path.
+     *
+     * The returned array must have the same keys as getCalendarObjects. The
+     * 'calendardata' object is required here though, while it's not required
+     * for getCalendarObjects.
+     *
+     * This method must return null if the object did not exist.
+     *
+     * @param mixed $calendarId
+     * @param string $objectUri
+     * @return array|null
+     */
+    function getCalendarObject($calendarId, $objectUri) {
+
+        $query = $this->db->getQueryBuilder();
+        $query->select(['id', 'uri', 'lastmodified', 'etag', 'calendarid', 'size', 'calendardata', 'componenttype', 'classification'])
+                ->from('calendarobjects')
+                ->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
+                ->andWhere($query->expr()->eq('uri', $query->createNamedParameter($objectUri)));
+        $stmt = $query->execute();
+        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
+
+        if(!$row) return null;
+
+        return [
+                'id'            => $row['id'],
+                'uri'           => $row['uri'],
+                'lastmodified'  => $row['lastmodified'],
+                'etag'          => '"' . $row['etag'] . '"',
+                'calendarid'    => $row['calendarid'],
+                'size'          => (int)$row['size'],
+                'calendardata'  => $this->readBlob($row['calendardata']),
+                'component'     => strtolower($row['componenttype']),
+                'classification'=> (int)$row['classification']
+        ];
+    }
+
+    /**
+     * Returns a list of calendar objects.
+     *
+     * This method should work identical to getCalendarObject, but instead
+     * return all the calendar objects in the list as an array.
+     *
+     * If the backend supports this, it may allow for some speed-ups.
+     *
+     * @param mixed $calendarId
+     * @param string[] $uris
+     * @return array
+     */
+    function getMultipleCalendarObjects($calendarId, array $uris) {
+        if (empty($uris)) {
+            return [];
+        }
+
+        $chunks = array_chunk($uris, 100);
+        $objects = [];
+
+        $query = $this->db->getQueryBuilder();
+        $query->select(['id', 'uri', 'lastmodified', 'etag', 'calendarid', 'size', 'calendardata', 'componenttype', 'classification'])
+            ->from('calendarobjects')
+            ->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
+            ->andWhere($query->expr()->in('uri', $query->createParameter('uri')));
+
+        foreach ($chunks as $uris) {
+            $query->setParameter('uri', $uris, IQueryBuilder::PARAM_STR_ARRAY);
+            $result = $query->execute();
+
+            while ($row = $result->fetch()) {
+                $objects[] = [
+                    'id'           => $row['id'],
+                    'uri'          => $row['uri'],
+                    'lastmodified' => $row['lastmodified'],
+                    'etag'         => '"' . $row['etag'] . '"',
+                    'calendarid'   => $row['calendarid'],
+                    'size'         => (int)$row['size'],
+                    'calendardata' => $this->readBlob($row['calendardata']),
+                    'component'    => strtolower($row['componenttype']),
+                    'classification' => (int)$row['classification']
+                ];
+            }
+            $result->closeCursor();
+        }
+        return $objects;
+    }
+
+    /**
+     * Creates a new calendar object.
+     *
+     * The object uri is only the basename, or filename and not a full path.
+     *
+     * It is possible return an etag from this function, which will be used in
+     * the response to this PUT request. Note that the ETag must be surrounded
+     * by double-quotes.
+     *
+     * However, you should only really return this ETag if you don't mangle the
+     * calendar-data. If the result of a subsequent GET to this object is not
+     * the exact same as this request body, you should omit the ETag.
+     *
+     * @param mixed $calendarId
+     * @param string $objectUri
+     * @param string $calendarData
+     * @return string
+     */
+    function createCalendarObject($calendarId, $objectUri, $calendarData) {
+        $extraData = $this->getDenormalizedData($calendarData);
+
+        $query = $this->db->getQueryBuilder();
+        $query->insert('calendarobjects')
+            ->values([
+                'calendarid' => $query->createNamedParameter($calendarId),
+                'uri' => $query->createNamedParameter($objectUri),
+                'calendardata' => $query->createNamedParameter($calendarData, IQueryBuilder::PARAM_LOB),
+                'lastmodified' => $query->createNamedParameter(time()),
+                'etag' => $query->createNamedParameter($extraData['etag']),
+                'size' => $query->createNamedParameter($extraData['size']),
+                'componenttype' => $query->createNamedParameter($extraData['componentType']),
+                'firstoccurence' => $query->createNamedParameter($extraData['firstOccurence']),
+                'lastoccurence' => $query->createNamedParameter($extraData['lastOccurence']),
+                'classification' => $query->createNamedParameter($extraData['classification']),
+                'uid' => $query->createNamedParameter($extraData['uid']),
+            ])
+            ->execute();
+
+        $this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject', new GenericEvent(
+            '\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject',
+            [
+                'calendarId' => $calendarId,
+                'calendarData' => $this->getCalendarById($calendarId),
+                'shares' => $this->getShares($calendarId),
+                'objectData' => $this->getCalendarObject($calendarId, $objectUri),
+            ]
+        ));
+        $this->addChange($calendarId, $objectUri, 1);
+
+        return '"' . $extraData['etag'] . '"';
+    }
+
+    /**
+     * Updates an existing calendarobject, based on it's uri.
+     *
+     * The object uri is only the basename, or filename and not a full path.
+     *
+     * It is possible return an etag from this function, which will be used in
+     * the response to this PUT request. Note that the ETag must be surrounded
+     * by double-quotes.
+     *
+     * However, you should only really return this ETag if you don't mangle the
+     * calendar-data. If the result of a subsequent GET to this object is not
+     * the exact same as this request body, you should omit the ETag.
+     *
+     * @param mixed $calendarId
+     * @param string $objectUri
+     * @param string $calendarData
+     * @return string
+     */
+    function updateCalendarObject($calendarId, $objectUri, $calendarData) {
+        $extraData = $this->getDenormalizedData($calendarData);
+
+        $query = $this->db->getQueryBuilder();
+        $query->update('calendarobjects')
+                ->set('calendardata', $query->createNamedParameter($calendarData, IQueryBuilder::PARAM_LOB))
+                ->set('lastmodified', $query->createNamedParameter(time()))
+                ->set('etag', $query->createNamedParameter($extraData['etag']))
+                ->set('size', $query->createNamedParameter($extraData['size']))
+                ->set('componenttype', $query->createNamedParameter($extraData['componentType']))
+                ->set('firstoccurence', $query->createNamedParameter($extraData['firstOccurence']))
+                ->set('lastoccurence', $query->createNamedParameter($extraData['lastOccurence']))
+                ->set('classification', $query->createNamedParameter($extraData['classification']))
+                ->set('uid', $query->createNamedParameter($extraData['uid']))
+            ->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
+            ->andWhere($query->expr()->eq('uri', $query->createNamedParameter($objectUri)))
+            ->execute();
+
+        $data = $this->getCalendarObject($calendarId, $objectUri);
+        if (is_array($data)) {
+            $this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCalendarObject', new GenericEvent(
+                '\OCA\DAV\CalDAV\CalDavBackend::updateCalendarObject',
+                [
+                    'calendarId' => $calendarId,
+                    'calendarData' => $this->getCalendarById($calendarId),
+                    'shares' => $this->getShares($calendarId),
+                    'objectData' => $data,
+                ]
+            ));
+        }
+        $this->addChange($calendarId, $objectUri, 2);
+
+        return '"' . $extraData['etag'] . '"';
+    }
+
+    /**
+     * @param int $calendarObjectId
+     * @param int $classification
+     */
+    public function setClassification($calendarObjectId, $classification) {
+        if (!in_array($classification, [
+            self::CLASSIFICATION_PUBLIC, self::CLASSIFICATION_PRIVATE, self::CLASSIFICATION_CONFIDENTIAL
+        ])) {
+            throw new \InvalidArgumentException();
+        }
+        $query = $this->db->getQueryBuilder();
+        $query->update('calendarobjects')
+            ->set('classification', $query->createNamedParameter($classification))
+            ->where($query->expr()->eq('id', $query->createNamedParameter($calendarObjectId)))
+            ->execute();
+    }
+
+    /**
+     * Deletes an existing calendar object.
+     *
+     * The object uri is only the basename, or filename and not a full path.
+     *
+     * @param mixed $calendarId
+     * @param string $objectUri
+     * @return void
+     */
+    function deleteCalendarObject($calendarId, $objectUri) {
+        $data = $this->getCalendarObject($calendarId, $objectUri);
+        if (is_array($data)) {
+            $this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject', new GenericEvent(
+                '\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject',
+                [
+                    'calendarId' => $calendarId,
+                    'calendarData' => $this->getCalendarById($calendarId),
+                    'shares' => $this->getShares($calendarId),
+                    'objectData' => $data,
+                ]
+            ));
+        }
+
+        $stmt = $this->db->prepare('DELETE FROM `*PREFIX*calendarobjects` WHERE `calendarid` = ? AND `uri` = ?');
+        $stmt->execute([$calendarId, $objectUri]);
+
+        $this->addChange($calendarId, $objectUri, 3);
+    }
+
+    /**
+     * Performs a calendar-query on the contents of this calendar.
+     *
+     * The calendar-query is defined in RFC4791 : CalDAV. Using the
+     * calendar-query it is possible for a client to request a specific set of
+     * object, based on contents of iCalendar properties, date-ranges and
+     * iCalendar component types (VTODO, VEVENT).
+     *
+     * This method should just return a list of (relative) urls that match this
+     * query.
+     *
+     * The list of filters are specified as an array. The exact array is
+     * documented by Sabre\CalDAV\CalendarQueryParser.
+     *
+     * Note that it is extremely likely that getCalendarObject for every path
+     * returned from this method will be called almost immediately after. You
+     * may want to anticipate this to speed up these requests.
+     *
+     * This method provides a default implementation, which parses *all* the
+     * iCalendar objects in the specified calendar.
+     *
+     * This default may well be good enough for personal use, and calendars
+     * that aren't very large. But if you anticipate high usage, big calendars
+     * or high loads, you are strongly advised to optimize certain paths.
+     *
+     * The best way to do so is override this method and to optimize
+     * specifically for 'common filters'.
+     *
+     * Requests that are extremely common are:
+     *   * requests for just VEVENTS
+     *   * requests for just VTODO
+     *   * requests with a time-range-filter on either VEVENT or VTODO.
+     *
+     * ..and combinations of these requests. It may not be worth it to try to
+     * handle every possible situation and just rely on the (relatively
+     * easy to use) CalendarQueryValidator to handle the rest.
+     *
+     * Note that especially time-range-filters may be difficult to parse. A
+     * time-range filter specified on a VEVENT must for instance also handle
+     * recurrence rules correctly.
+     * A good example of how to interprete all these filters can also simply
+     * be found in Sabre\CalDAV\CalendarQueryFilter. This class is as correct
+     * as possible, so it gives you a good idea on what type of stuff you need
+     * to think of.
+     *
+     * @param mixed $calendarId
+     * @param array $filters
+     * @return array
+     */
+    function calendarQuery($calendarId, array $filters) {
+        $componentType = null;
+        $requirePostFilter = true;
+        $timeRange = null;
+
+        // if no filters were specified, we don't need to filter after a query
+        if (!$filters['prop-filters'] && !$filters['comp-filters']) {
+            $requirePostFilter = false;
+        }
+
+        // Figuring out if there's a component filter
+        if (count($filters['comp-filters']) > 0 && !$filters['comp-filters'][0]['is-not-defined']) {
+            $componentType = $filters['comp-filters'][0]['name'];
+
+            // Checking if we need post-filters
+            if (!$filters['prop-filters'] && !$filters['comp-filters'][0]['comp-filters'] && !$filters['comp-filters'][0]['time-range'] && !$filters['comp-filters'][0]['prop-filters']) {
+                $requirePostFilter = false;
+            }
+            // There was a time-range filter
+            if ($componentType == 'VEVENT' && isset($filters['comp-filters'][0]['time-range'])) {
+                $timeRange = $filters['comp-filters'][0]['time-range'];
+
+                // If start time OR the end time is not specified, we can do a
+                // 100% accurate mysql query.
+                if (!$filters['prop-filters'] && !$filters['comp-filters'][0]['comp-filters'] && !$filters['comp-filters'][0]['prop-filters'] && (!$timeRange['start'] || !$timeRange['end'])) {
+                    $requirePostFilter = false;
+                }
+            }
+
+        }
+        $columns = ['uri'];
+        if ($requirePostFilter) {
+            $columns = ['uri', 'calendardata'];
+        }
+        $query = $this->db->getQueryBuilder();
+        $query->select($columns)
+            ->from('calendarobjects')
+            ->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)));
+
+        if ($componentType) {
+            $query->andWhere($query->expr()->eq('componenttype', $query->createNamedParameter($componentType)));
+        }
+
+        if ($timeRange && $timeRange['start']) {
+            $query->andWhere($query->expr()->gt('lastoccurence', $query->createNamedParameter($timeRange['start']->getTimeStamp())));
+        }
+        if ($timeRange && $timeRange['end']) {
+            $query->andWhere($query->expr()->lt('firstoccurence', $query->createNamedParameter($timeRange['end']->getTimeStamp())));
+        }
+
+        $stmt = $query->execute();
+
+        $result = [];
+        while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            if ($requirePostFilter) {
+                if (!$this->validateFilterForObject($row, $filters)) {
+                    continue;
+                }
+            }
+            $result[] = $row['uri'];
+        }
+
+        return $result;
+    }
+
+    /**
+     * Searches through all of a users calendars and calendar objects to find
+     * an object with a specific UID.
+     *
+     * This method should return the path to this object, relative to the
+     * calendar home, so this path usually only contains two parts:
+     *
+     * calendarpath/objectpath.ics
+     *
+     * If the uid is not found, return null.
+     *
+     * This method should only consider * objects that the principal owns, so
+     * any calendars owned by other principals that also appear in this
+     * collection should be ignored.
+     *
+     * @param string $principalUri
+     * @param string $uid
+     * @return string|null
+     */
+    function getCalendarObjectByUID($principalUri, $uid) {
+
+        $query = $this->db->getQueryBuilder();
+        $query->selectAlias('c.uri', 'calendaruri')->selectAlias('co.uri', 'objecturi')
+            ->from('calendarobjects', 'co')
+            ->leftJoin('co', 'calendars', 'c', $query->expr()->eq('co.calendarid', 'c.id'))
+            ->where($query->expr()->eq('c.principaluri', $query->createNamedParameter($principalUri)))
+            ->andWhere($query->expr()->eq('co.uid', $query->createNamedParameter($uid)));
+
+        $stmt = $query->execute();
+
+        if ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            return $row['calendaruri'] . '/' . $row['objecturi'];
+        }
+
+        return null;
+    }
+
+    /**
+     * The getChanges method returns all the changes that have happened, since
+     * the specified syncToken in the specified calendar.
+     *
+     * This function should return an array, such as the following:
+     *
+     * [
+     *   'syncToken' => 'The current synctoken',
+     *   'added'   => [
+     *      'new.txt',
+     *   ],
+     *   'modified'   => [
+     *      'modified.txt',
+     *   ],
+     *   'deleted' => [
+     *      'foo.php.bak',
+     *      'old.txt'
+     *   ]
+     * );
+     *
+     * The returned syncToken property should reflect the *current* syncToken
+     * of the calendar, as reported in the {http://sabredav.org/ns}sync-token
+     * property This is * needed here too, to ensure the operation is atomic.
+     *
+     * If the $syncToken argument is specified as null, this is an initial
+     * sync, and all members should be reported.
+     *
+     * The modified property is an array of nodenames that have changed since
+     * the last token.
+     *
+     * The deleted property is an array with nodenames, that have been deleted
+     * from collection.
+     *
+     * The $syncLevel argument is basically the 'depth' of the report. If it's
+     * 1, you only have to report changes that happened only directly in
+     * immediate descendants. If it's 2, it should also include changes from
+     * the nodes below the child collections. (grandchildren)
+     *
+     * The $limit argument allows a client to specify how many results should
+     * be returned at most. If the limit is not specified, it should be treated
+     * as infinite.
+     *
+     * If the limit (infinite or not) is higher than you're willing to return,
+     * you should throw a Sabre\DAV\Exception\TooMuchMatches() exception.
+     *
+     * If the syncToken is expired (due to data cleanup) or unknown, you must
+     * return null.
+     *
+     * The limit is 'suggestive'. You are free to ignore it.
+     *
+     * @param string $calendarId
+     * @param string $syncToken
+     * @param int $syncLevel
+     * @param int $limit
+     * @return array
+     */
+    function getChangesForCalendar($calendarId, $syncToken, $syncLevel, $limit = null) {
+        // Current synctoken
+        $stmt = $this->db->prepare('SELECT `synctoken` FROM `*PREFIX*calendars` WHERE `id` = ?');
+        $stmt->execute([ $calendarId ]);
+        $currentToken = $stmt->fetchColumn(0);
+
+        if (is_null($currentToken)) {
+            return null;
+        }
+
+        $result = [
+            'syncToken' => $currentToken,
+            'added'     => [],
+            'modified'  => [],
+            'deleted'   => [],
+        ];
+
+        if ($syncToken) {
+
+            $query = "SELECT `uri`, `operation` FROM `*PREFIX*calendarchanges` WHERE `synctoken` >= ? AND `synctoken` < ? AND `calendarid` = ? ORDER BY `synctoken`";
+            if ($limit>0) {
+                $query.= " `LIMIT` " . (int)$limit;
+            }
+
+            // Fetching all changes
+            $stmt = $this->db->prepare($query);
+            $stmt->execute([$syncToken, $currentToken, $calendarId]);
+
+            $changes = [];
+
+            // This loop ensures that any duplicates are overwritten, only the
+            // last change on a node is relevant.
+            while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+
+                $changes[$row['uri']] = $row['operation'];
+
+            }
+
+            foreach($changes as $uri => $operation) {
+
+                switch($operation) {
+                    case 1 :
+                        $result['added'][] = $uri;
+                        break;
+                    case 2 :
+                        $result['modified'][] = $uri;
+                        break;
+                    case 3 :
+                        $result['deleted'][] = $uri;
+                        break;
+                }
+
+            }
+        } else {
+            // No synctoken supplied, this is the initial sync.
+            $query = "SELECT `uri` FROM `*PREFIX*calendarobjects` WHERE `calendarid` = ?";
+            $stmt = $this->db->prepare($query);
+            $stmt->execute([$calendarId]);
+
+            $result['added'] = $stmt->fetchAll(\PDO::FETCH_COLUMN);
+        }
+        return $result;
+
+    }
+
+    /**
+     * Returns a list of subscriptions for a principal.
+     *
+     * Every subscription is an array with the following keys:
+     *  * id, a unique id that will be used by other functions to modify the
+     *    subscription. This can be the same as the uri or a database key.
+     *  * uri. This is just the 'base uri' or 'filename' of the subscription.
+     *  * principaluri. The owner of the subscription. Almost always the same as
+     *    principalUri passed to this method.
+     *
+     * Furthermore, all the subscription info must be returned too:
+     *
+     * 1. {DAV:}displayname
+     * 2. {http://apple.com/ns/ical/}refreshrate
+     * 3. {http://calendarserver.org/ns/}subscribed-strip-todos (omit if todos
+     *    should not be stripped).
+     * 4. {http://calendarserver.org/ns/}subscribed-strip-alarms (omit if alarms
+     *    should not be stripped).
+     * 5. {http://calendarserver.org/ns/}subscribed-strip-attachments (omit if
+     *    attachments should not be stripped).
+     * 6. {http://calendarserver.org/ns/}source (Must be a
+     *     Sabre\DAV\Property\Href).
+     * 7. {http://apple.com/ns/ical/}calendar-color
+     * 8. {http://apple.com/ns/ical/}calendar-order
+     * 9. {urn:ietf:params:xml:ns:caldav}supported-calendar-component-set
+     *    (should just be an instance of
+     *    Sabre\CalDAV\Property\SupportedCalendarComponentSet, with a bunch of
+     *    default components).
+     *
+     * @param string $principalUri
+     * @return array
+     */
+    function getSubscriptionsForUser($principalUri) {
+        $fields = array_values($this->subscriptionPropertyMap);
+        $fields[] = 'id';
+        $fields[] = 'uri';
+        $fields[] = 'source';
+        $fields[] = 'principaluri';
+        $fields[] = 'lastmodified';
+
+        $query = $this->db->getQueryBuilder();
+        $query->select($fields)
+            ->from('calendarsubscriptions')
+            ->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
+            ->orderBy('calendarorder', 'asc');
+        $stmt =$query->execute();
+
+        $subscriptions = [];
+        while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+
+            $subscription = [
+                'id'           => $row['id'],
+                'uri'          => $row['uri'],
+                'principaluri' => $row['principaluri'],
+                'source'       => $row['source'],
+                'lastmodified' => $row['lastmodified'],
+
+                '{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet(['VTODO', 'VEVENT']),
+            ];
+
+            foreach($this->subscriptionPropertyMap as $xmlName=>$dbName) {
+                if (!is_null($row[$dbName])) {
+                    $subscription[$xmlName] = $row[$dbName];
+                }
+            }
+
+            $subscriptions[] = $subscription;
+
+        }
+
+        return $subscriptions;
+    }
+
+    /**
+     * Creates a new subscription for a principal.
+     *
+     * If the creation was a success, an id must be returned that can be used to reference
+     * this subscription in other methods, such as updateSubscription.
+     *
+     * @param string $principalUri
+     * @param string $uri
+     * @param array $properties
+     * @return mixed
+     */
+    function createSubscription($principalUri, $uri, array $properties) {
+
+        if (!isset($properties['{http://calendarserver.org/ns/}source'])) {
+            throw new Forbidden('The {http://calendarserver.org/ns/}source property is required when creating subscriptions');
+        }
+
+        $values = [
+            'principaluri' => $principalUri,
+            'uri'          => $uri,
+            'source'       => $properties['{http://calendarserver.org/ns/}source']->getHref(),
+            'lastmodified' => time(),
+        ];
+
+        $propertiesBoolean = ['striptodos', 'stripalarms', 'stripattachments'];
+
+        foreach($this->subscriptionPropertyMap as $xmlName=>$dbName) {
+            if (array_key_exists($xmlName, $properties)) {
+                    $values[$dbName] = $properties[$xmlName];
+                    if (in_array($dbName, $propertiesBoolean)) {
+                        $values[$dbName] = true;
+                }
+            }
+        }
+
+        $valuesToInsert = array();
+
+        $query = $this->db->getQueryBuilder();
+
+        foreach (array_keys($values) as $name) {
+            $valuesToInsert[$name] = $query->createNamedParameter($values[$name]);
+        }
+
+        $query->insert('calendarsubscriptions')
+            ->values($valuesToInsert)
+            ->execute();
+
+        return $this->db->lastInsertId('*PREFIX*calendarsubscriptions');
+    }
+
+    /**
+     * Updates a subscription
+     *
+     * The list of mutations is stored in a Sabre\DAV\PropPatch object.
+     * To do the actual updates, you must tell this object which properties
+     * you're going to process with the handle() method.
+     *
+     * Calling the handle method is like telling the PropPatch object "I
+     * promise I can handle updating this property".
+     *
+     * Read the PropPatch documentation for more info and examples.
+     *
+     * @param mixed $subscriptionId
+     * @param PropPatch $propPatch
+     * @return void
+     */
+    function updateSubscription($subscriptionId, PropPatch $propPatch) {
+        $supportedProperties = array_keys($this->subscriptionPropertyMap);
+        $supportedProperties[] = '{http://calendarserver.org/ns/}source';
+
+        $propPatch->handle($supportedProperties, function($mutations) use ($subscriptionId) {
+
+            $newValues = [];
+
+            foreach($mutations as $propertyName=>$propertyValue) {
+                if ($propertyName === '{http://calendarserver.org/ns/}source') {
+                    $newValues['source'] = $propertyValue->getHref();
+                } else {
+                    $fieldName = $this->subscriptionPropertyMap[$propertyName];
+                    $newValues[$fieldName] = $propertyValue;
+                }
+            }
+
+            $query = $this->db->getQueryBuilder();
+            $query->update('calendarsubscriptions')
+                ->set('lastmodified', $query->createNamedParameter(time()));
+            foreach($newValues as $fieldName=>$value) {
+                $query->set($fieldName, $query->createNamedParameter($value));
+            }
+            $query->where($query->expr()->eq('id', $query->createNamedParameter($subscriptionId)))
+                ->execute();
+
+            return true;
+
+        });
+    }
+
+    /**
+     * Deletes a subscription.
+     *
+     * @param mixed $subscriptionId
+     * @return void
+     */
+    function deleteSubscription($subscriptionId) {
+        $query = $this->db->getQueryBuilder();
+        $query->delete('calendarsubscriptions')
+            ->where($query->expr()->eq('id', $query->createNamedParameter($subscriptionId)))
+            ->execute();
+    }
+
+    /**
+     * Returns a single scheduling object for the inbox collection.
+     *
+     * The returned array should contain the following elements:
+     *   * uri - A unique basename for the object. This will be used to
+     *           construct a full uri.
+     *   * calendardata - The iCalendar object
+     *   * lastmodified - The last modification date. Can be an int for a unix
+     *                    timestamp, or a PHP DateTime object.
+     *   * etag - A unique token that must change if the object changed.
+     *   * size - The size of the object, in bytes.
+     *
+     * @param string $principalUri
+     * @param string $objectUri
+     * @return array
+     */
+    function getSchedulingObject($principalUri, $objectUri) {
+        $query = $this->db->getQueryBuilder();
+        $stmt = $query->select(['uri', 'calendardata', 'lastmodified', 'etag', 'size'])
+            ->from('schedulingobjects')
+            ->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
+            ->andWhere($query->expr()->eq('uri', $query->createNamedParameter($objectUri)))
+            ->execute();
+
+        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
+
+        if(!$row) {
+            return null;
+        }
+
+        return [
+                'uri'          => $row['uri'],
+                'calendardata' => $row['calendardata'],
+                'lastmodified' => $row['lastmodified'],
+                'etag'         => '"' . $row['etag'] . '"',
+                'size'         => (int)$row['size'],
+        ];
+    }
+
+    /**
+     * Returns all scheduling objects for the inbox collection.
+     *
+     * These objects should be returned as an array. Every item in the array
+     * should follow the same structure as returned from getSchedulingObject.
+     *
+     * The main difference is that 'calendardata' is optional.
+     *
+     * @param string $principalUri
+     * @return array
+     */
+    function getSchedulingObjects($principalUri) {
+        $query = $this->db->getQueryBuilder();
+        $stmt = $query->select(['uri', 'calendardata', 'lastmodified', 'etag', 'size'])
+                ->from('schedulingobjects')
+                ->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
+                ->execute();
+
+        $result = [];
+        foreach($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
+            $result[] = [
+                    'calendardata' => $row['calendardata'],
+                    'uri'          => $row['uri'],
+                    'lastmodified' => $row['lastmodified'],
+                    'etag'         => '"' . $row['etag'] . '"',
+                    'size'         => (int)$row['size'],
+            ];
+        }
+
+        return $result;
+    }
+
+    /**
+     * Deletes a scheduling object from the inbox collection.
+     *
+     * @param string $principalUri
+     * @param string $objectUri
+     * @return void
+     */
+    function deleteSchedulingObject($principalUri, $objectUri) {
+        $query = $this->db->getQueryBuilder();
+        $query->delete('schedulingobjects')
+                ->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
+                ->andWhere($query->expr()->eq('uri', $query->createNamedParameter($objectUri)))
+                ->execute();
+    }
+
+    /**
+     * Creates a new scheduling object. This should land in a users' inbox.
+     *
+     * @param string $principalUri
+     * @param string $objectUri
+     * @param string $objectData
+     * @return void
+     */
+    function createSchedulingObject($principalUri, $objectUri, $objectData) {
+        $query = $this->db->getQueryBuilder();
+        $query->insert('schedulingobjects')
+            ->values([
+                'principaluri' => $query->createNamedParameter($principalUri),
+                'calendardata' => $query->createNamedParameter($objectData),
+                'uri' => $query->createNamedParameter($objectUri),
+                'lastmodified' => $query->createNamedParameter(time()),
+                'etag' => $query->createNamedParameter(md5($objectData)),
+                'size' => $query->createNamedParameter(strlen($objectData))
+            ])
+            ->execute();
+    }
+
+    /**
+     * Adds a change record to the calendarchanges table.
+     *
+     * @param mixed $calendarId
+     * @param string $objectUri
+     * @param int $operation 1 = add, 2 = modify, 3 = delete.
+     * @return void
+     */
+    protected function addChange($calendarId, $objectUri, $operation) {
+
+        $stmt = $this->db->prepare('INSERT INTO `*PREFIX*calendarchanges` (`uri`, `synctoken`, `calendarid`, `operation`) SELECT ?, `synctoken`, ?, ? FROM `*PREFIX*calendars` WHERE `id` = ?');
+        $stmt->execute([
+            $objectUri,
+            $calendarId,
+            $operation,
+            $calendarId
+        ]);
+        $stmt = $this->db->prepare('UPDATE `*PREFIX*calendars` SET `synctoken` = `synctoken` + 1 WHERE `id` = ?');
+        $stmt->execute([
+            $calendarId
+        ]);
+
+    }
+
+    /**
+     * Parses some information from calendar objects, used for optimized
+     * calendar-queries.
+     *
+     * Returns an array with the following keys:
+     *   * etag - An md5 checksum of the object without the quotes.
+     *   * size - Size of the object in bytes
+     *   * componentType - VEVENT, VTODO or VJOURNAL
+     *   * firstOccurence
+     *   * lastOccurence
+     *   * uid - value of the UID property
+     *
+     * @param string $calendarData
+     * @return array
+     */
+    public function getDenormalizedData($calendarData) {
+
+        $vObject = Reader::read($calendarData);
+        $componentType = null;
+        $component = null;
+        $firstOccurrence = null;
+        $lastOccurrence = null;
+        $uid = null;
+        $classification = self::CLASSIFICATION_PUBLIC;
+        foreach($vObject->getComponents() as $component) {
+            if ($component->name!=='VTIMEZONE') {
+                $componentType = $component->name;
+                $uid = (string)$component->UID;
+                break;
+            }
+        }
+        if (!$componentType) {
+            throw new \Sabre\DAV\Exception\BadRequest('Calendar objects must have a VJOURNAL, VEVENT or VTODO component');
+        }
+        if ($componentType === 'VEVENT' && $component->DTSTART) {
+            $firstOccurrence = $component->DTSTART->getDateTime()->getTimeStamp();
+            // Finding the last occurrence is a bit harder
+            if (!isset($component->RRULE)) {
+                if (isset($component->DTEND)) {
+                    $lastOccurrence = $component->DTEND->getDateTime()->getTimeStamp();
+                } elseif (isset($component->DURATION)) {
+                    $endDate = clone $component->DTSTART->getDateTime();
+                    $endDate->add(DateTimeParser::parse($component->DURATION->getValue()));
+                    $lastOccurrence = $endDate->getTimeStamp();
+                } elseif (!$component->DTSTART->hasTime()) {
+                    $endDate = clone $component->DTSTART->getDateTime();
+                    $endDate->modify('+1 day');
+                    $lastOccurrence = $endDate->getTimeStamp();
+                } else {
+                    $lastOccurrence = $firstOccurrence;
+                }
+            } else {
+                $it = new EventIterator($vObject, (string)$component->UID);
+                $maxDate = new \DateTime(self::MAX_DATE);
+                if ($it->isInfinite()) {
+                    $lastOccurrence = $maxDate->getTimestamp();
+                } else {
+                    $end = $it->getDtEnd();
+                    while($it->valid() && $end < $maxDate) {
+                        $end = $it->getDtEnd();
+                        $it->next();
+
+                    }
+                    $lastOccurrence = $end->getTimestamp();
+                }
+
+            }
+        }
+
+        if ($component->CLASS) {
+            $classification = CalDavBackend::CLASSIFICATION_PRIVATE;
+            switch ($component->CLASS->getValue()) {
+                case 'PUBLIC':
+                    $classification = CalDavBackend::CLASSIFICATION_PUBLIC;
+                    break;
+                case 'CONFIDENTIAL':
+                    $classification = CalDavBackend::CLASSIFICATION_CONFIDENTIAL;
+                    break;
+            }
+        }
+        return [
+            'etag' => md5($calendarData),
+            'size' => strlen($calendarData),
+            'componentType' => $componentType,
+            'firstOccurence' => is_null($firstOccurrence) ? null : max(0, $firstOccurrence),
+            'lastOccurence'  => $lastOccurrence,
+            'uid' => $uid,
+            'classification' => $classification
+        ];
+
+    }
+
+    private function readBlob($cardData) {
+        if (is_resource($cardData)) {
+            return stream_get_contents($cardData);
+        }
+
+        return $cardData;
+    }
+
+    /**
+     * @param IShareable $shareable
+     * @param array $add
+     * @param array $remove
+     */
+    public function updateShares($shareable, $add, $remove) {
+        $calendarId = $shareable->getResourceId();
+        $this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateShares', new GenericEvent(
+            '\OCA\DAV\CalDAV\CalDavBackend::updateShares',
+            [
+                'calendarId' => $calendarId,
+                'calendarData' => $this->getCalendarById($calendarId),
+                'shares' => $this->getShares($calendarId),
+                'add' => $add,
+                'remove' => $remove,
+            ]));
+        $this->sharingBackend->updateShares($shareable, $add, $remove);
+    }
+
+    /**
+     * @param int $resourceId
+     * @return array
+     */
+    public function getShares($resourceId) {
+        return $this->sharingBackend->getShares($resourceId);
+    }
+
+    /**
+     * @param boolean $value
+     * @param \OCA\DAV\CalDAV\Calendar $calendar
+     * @return string|null
+     */
+    public function setPublishStatus($value, $calendar) {
+        $query = $this->db->getQueryBuilder();
+        if ($value) {
+            $publicUri = $this->random->generate(16, ISecureRandom::CHAR_UPPER.ISecureRandom::CHAR_DIGITS);
+            $query->insert('dav_shares')
+                ->values([
+                    'principaluri' => $query->createNamedParameter($calendar->getPrincipalURI()),
+                    'type' => $query->createNamedParameter('calendar'),
+                    'access' => $query->createNamedParameter(self::ACCESS_PUBLIC),
+                    'resourceid' => $query->createNamedParameter($calendar->getResourceId()),
+                    'publicuri' => $query->createNamedParameter($publicUri)
+                ]);
+            $query->execute();
+            return $publicUri;
+        }
+        $query->delete('dav_shares')
+            ->where($query->expr()->eq('resourceid', $query->createNamedParameter($calendar->getResourceId())))
+            ->andWhere($query->expr()->eq('access', $query->createNamedParameter(self::ACCESS_PUBLIC)));
+        $query->execute();
+        return null;
+    }
+
+    /**
+     * @param \OCA\DAV\CalDAV\Calendar $calendar
+     * @return mixed
+     */
+    public function getPublishStatus($calendar) {
+        $query = $this->db->getQueryBuilder();
+        $result = $query->select('publicuri')
+            ->from('dav_shares')
+            ->where($query->expr()->eq('resourceid', $query->createNamedParameter($calendar->getResourceId())))
+            ->andWhere($query->expr()->eq('access', $query->createNamedParameter(self::ACCESS_PUBLIC)))
+            ->execute();
+
+        $row = $result->fetch();
+        $result->closeCursor();
+        return $row ? reset($row) : false;
+    }
+
+    /**
+     * @param int $resourceId
+     * @param array $acl
+     * @return array
+     */
+    public function applyShareAcl($resourceId, $acl) {
+        return $this->sharingBackend->applyShareAcl($resourceId, $acl);
+    }
+
+    private function convertPrincipal($principalUri, $toV2) {
+        if ($this->principalBackend->getPrincipalPrefix() === 'principals') {
+            list(, $name) = URLUtil::splitPath($principalUri);
+            if ($toV2 === true) {
+                return "principals/users/$name";
+            }
+            return "principals/$name";
+        }
+        return $principalUri;
+    }
 }

Spacing +109 added lines, -109 removed lines

@@ -179,7 +179,7 @@ 
 			$query->andWhere($query->expr()->neq('uri', $query->createNamedParameter(BirthdayService::BIRTHDAY_CALENDAR_URI)));
 		}
 
-		return (int)$query->execute()->fetchColumn();
+		return (int) $query->execute()->fetchColumn();
 	}
 
 	/**
@@ -226,25 +226,25 @@ 
 		$stmt = $query->execute();
 
 		$calendars = [];
-		while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+		while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
 
 			$components = [];
 			if ($row['components']) {
-				$components = explode(',',$row['components']);
+				$components = explode(',', $row['components']);
 			}
 
 			$calendar = [
 				'id' => $row['id'],
 				'uri' => $row['uri'],
 				'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-				'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-				'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($principalUri, !$this->legacyEndpoint),
+				'{'.Plugin::NS_CALENDARSERVER.'}getctag' => 'http://sabre.io/ns/sync/'.($row['synctoken'] ? $row['synctoken'] : '0'),
+				'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
+				'{'.Plugin::NS_CALDAV.'}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+				'{'.Plugin::NS_CALDAV.'}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent'] ? 'transparent' : 'opaque'),
+				'{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}owner-principal' => $this->convertPrincipal($principalUri, !$this->legacyEndpoint),
 			];
 
-			foreach($this->propertyMap as $xmlName=>$dbName) {
+			foreach ($this->propertyMap as $xmlName=>$dbName) {
 				$calendar[$xmlName] = $row[$dbName];
 			}
 
@@ -257,7 +257,7 @@ 
 
 		// query for shared calendars
 		$principals = $this->principalBackend->getGroupMembership($principalUriOriginal, true);
-		$principals[]= $principalUri;
+		$principals[] = $principalUri;
 
 		$fields = array_values($this->propertyMap);
 		$fields[] = 'a.id';
@@ -277,8 +277,8 @@ 
 			->setParameter('principaluri', $principals, \Doctrine\DBAL\Connection::PARAM_STR_ARRAY)
 			->execute();
 
-		$readOnlyPropertyName = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only';
-		while($row = $result->fetch()) {
+		$readOnlyPropertyName = '{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}read-only';
+		while ($row = $result->fetch()) {
 			$readOnly = (int) $row['access'] === Backend::ACCESS_READ;
 			if (isset($calendars[$row['id']])) {
 				if ($readOnly) {
@@ -293,25 +293,25 @@ 
 			}
 
 			list(, $name) = URLUtil::splitPath($row['principaluri']);
-			$uri = $row['uri'] . '_shared_by_' . $name;
-			$row['displayname'] = $row['displayname'] . ' (' . $this->getUserDisplayName($name) . ')';
+			$uri = $row['uri'].'_shared_by_'.$name;
+			$row['displayname'] = $row['displayname'].' ('.$this->getUserDisplayName($name).')';
 			$components = [];
 			if ($row['components']) {
-				$components = explode(',',$row['components']);
+				$components = explode(',', $row['components']);
 			}
 			$calendar = [
 				'id' => $row['id'],
 				'uri' => $uri,
 				'principaluri' => $this->convertPrincipal($principalUri, !$this->legacyEndpoint),
-				'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-				'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+				'{'.Plugin::NS_CALENDARSERVER.'}getctag' => 'http://sabre.io/ns/sync/'.($row['synctoken'] ? $row['synctoken'] : '0'),
+				'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
+				'{'.Plugin::NS_CALDAV.'}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+				'{'.Plugin::NS_CALDAV.'}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent'] ? 'transparent' : 'opaque'),
+				'{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}owner-principal' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
 				$readOnlyPropertyName => $readOnly,
 			];
 
-			foreach($this->propertyMap as $xmlName=>$dbName) {
+			foreach ($this->propertyMap as $xmlName=>$dbName) {
 				$calendar[$xmlName] = $row[$dbName];
 			}
 
@@ -338,21 +338,21 @@ 
 			->orderBy('calendarorder', 'ASC');
 		$stmt = $query->execute();
 		$calendars = [];
-		while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+		while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
 			$components = [];
 			if ($row['components']) {
-				$components = explode(',',$row['components']);
+				$components = explode(',', $row['components']);
 			}
 			$calendar = [
 				'id' => $row['id'],
 				'uri' => $row['uri'],
 				'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-				'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-				'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+				'{'.Plugin::NS_CALENDARSERVER.'}getctag' => 'http://sabre.io/ns/sync/'.($row['synctoken'] ? $row['synctoken'] : '0'),
+				'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
+				'{'.Plugin::NS_CALDAV.'}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+				'{'.Plugin::NS_CALDAV.'}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent'] ? 'transparent' : 'opaque'),
 			];
-			foreach($this->propertyMap as $xmlName=>$dbName) {
+			foreach ($this->propertyMap as $xmlName=>$dbName) {
 				$calendar[$xmlName] = $row[$dbName];
 			}
 			if (!isset($calendars[$calendar['id']])) {
@@ -400,27 +400,27 @@ 
 			->andWhere($query->expr()->eq('s.type', $query->createNamedParameter('calendar')))
 			->execute();
 
-		while($row = $result->fetch()) {
+		while ($row = $result->fetch()) {
 			list(, $name) = URLUtil::splitPath($row['principaluri']);
-			$row['displayname'] = $row['displayname'] . "($name)";
+			$row['displayname'] = $row['displayname']."($name)";
 			$components = [];
 			if ($row['components']) {
-				$components = explode(',',$row['components']);
+				$components = explode(',', $row['components']);
 			}
 			$calendar = [
 				'id' => $row['id'],
 				'uri' => $row['publicuri'],
 				'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-				'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-				'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], $this->legacyEndpoint),
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only' => (int)$row['access'] === Backend::ACCESS_READ,
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}public' => (int)$row['access'] === self::ACCESS_PUBLIC,
+				'{'.Plugin::NS_CALENDARSERVER.'}getctag' => 'http://sabre.io/ns/sync/'.($row['synctoken'] ? $row['synctoken'] : '0'),
+				'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
+				'{'.Plugin::NS_CALDAV.'}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+				'{'.Plugin::NS_CALDAV.'}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent'] ? 'transparent' : 'opaque'),
+				'{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}owner-principal' => $this->convertPrincipal($row['principaluri'], $this->legacyEndpoint),
+				'{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}read-only' => (int) $row['access'] === Backend::ACCESS_READ,
+				'{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}public' => (int) $row['access'] === self::ACCESS_PUBLIC,
 			];
 
-			foreach($this->propertyMap as $xmlName=>$dbName) {
+			foreach ($this->propertyMap as $xmlName=>$dbName) {
 				$calendar[$xmlName] = $row[$dbName];
 			}
 
@@ -462,29 +462,29 @@ 
 		$result->closeCursor();
 
 		if ($row === false) {
-			throw new NotFound('Node with name \'' . $uri . '\' could not be found');
+			throw new NotFound('Node with name \''.$uri.'\' could not be found');
 		}
 
 		list(, $name) = URLUtil::splitPath($row['principaluri']);
-		$row['displayname'] = $row['displayname'] . ' ' . "($name)";
+		$row['displayname'] = $row['displayname'].' '."($name)";
 		$components = [];
 		if ($row['components']) {
-			$components = explode(',',$row['components']);
+			$components = explode(',', $row['components']);
 		}
 		$calendar = [
 			'id' => $row['id'],
 			'uri' => $row['publicuri'],
 			'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-			'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-			'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-			'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-			'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-			'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-			'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only' => (int)$row['access'] === Backend::ACCESS_READ,
-			'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}public' => (int)$row['access'] === self::ACCESS_PUBLIC,
+			'{'.Plugin::NS_CALENDARSERVER.'}getctag' => 'http://sabre.io/ns/sync/'.($row['synctoken'] ? $row['synctoken'] : '0'),
+			'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
+			'{'.Plugin::NS_CALDAV.'}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+			'{'.Plugin::NS_CALDAV.'}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent'] ? 'transparent' : 'opaque'),
+			'{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}owner-principal' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+			'{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}read-only' => (int) $row['access'] === Backend::ACCESS_READ,
+			'{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}public' => (int) $row['access'] === self::ACCESS_PUBLIC,
 		];
 
-		foreach($this->propertyMap as $xmlName=>$dbName) {
+		foreach ($this->propertyMap as $xmlName=>$dbName) {
 			$calendar[$xmlName] = $row[$dbName];
 		}
 
@@ -522,20 +522,20 @@ 
 
 		$components = [];
 		if ($row['components']) {
-			$components = explode(',',$row['components']);
+			$components = explode(',', $row['components']);
 		}
 
 		$calendar = [
 			'id' => $row['id'],
 			'uri' => $row['uri'],
 			'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-			'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-			'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-			'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-			'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+			'{'.Plugin::NS_CALENDARSERVER.'}getctag' => 'http://sabre.io/ns/sync/'.($row['synctoken'] ? $row['synctoken'] : '0'),
+			'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
+			'{'.Plugin::NS_CALDAV.'}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+			'{'.Plugin::NS_CALDAV.'}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent'] ? 'transparent' : 'opaque'),
 		];
 
-		foreach($this->propertyMap as $xmlName=>$dbName) {
+		foreach ($this->propertyMap as $xmlName=>$dbName) {
 			$calendar[$xmlName] = $row[$dbName];
 		}
 
@@ -566,20 +566,20 @@ 
 
 		$components = [];
 		if ($row['components']) {
-			$components = explode(',',$row['components']);
+			$components = explode(',', $row['components']);
 		}
 
 		$calendar = [
 			'id' => $row['id'],
 			'uri' => $row['uri'],
 			'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-			'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-			'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-			'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-			'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+			'{'.Plugin::NS_CALENDARSERVER.'}getctag' => 'http://sabre.io/ns/sync/'.($row['synctoken'] ? $row['synctoken'] : '0'),
+			'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
+			'{'.Plugin::NS_CALDAV.'}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+			'{'.Plugin::NS_CALDAV.'}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent'] ? 'transparent' : 'opaque'),
 		];
 
-		foreach($this->propertyMap as $xmlName=>$dbName) {
+		foreach ($this->propertyMap as $xmlName=>$dbName) {
 			$calendar[$xmlName] = $row[$dbName];
 		}
 
@@ -611,16 +611,16 @@ 
 		$sccs = '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set';
 		if (isset($properties[$sccs])) {
 			if (!($properties[$sccs] instanceof SupportedCalendarComponentSet)) {
-				throw new DAV\Exception('The ' . $sccs . ' property must be of type: \Sabre\CalDAV\Property\SupportedCalendarComponentSet');
+				throw new DAV\Exception('The '.$sccs.' property must be of type: \Sabre\CalDAV\Property\SupportedCalendarComponentSet');
 			}
-			$values['components'] = implode(',',$properties[$sccs]->getValue());
+			$values['components'] = implode(',', $properties[$sccs]->getValue());
 		}
-		$transp = '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp';
+		$transp = '{'.Plugin::NS_CALDAV.'}schedule-calendar-transp';
 		if (isset($properties[$transp])) {
-			$values['transparent'] = $properties[$transp]->getValue()==='transparent';
+			$values['transparent'] = $properties[$transp]->getValue() === 'transparent';
 		}
 
-		foreach($this->propertyMap as $xmlName=>$dbName) {
+		foreach ($this->propertyMap as $xmlName=>$dbName) {
 			if (isset($properties[$xmlName])) {
 				$values[$dbName] = $properties[$xmlName];
 			}
@@ -628,7 +628,7 @@ 
 
 		$query = $this->db->getQueryBuilder();
 		$query->insert('calendars');
-		foreach($values as $column => $value) {
+		foreach ($values as $column => $value) {
 			$query->setValue($column, $query->createNamedParameter($value));
 		}
 		$query->execute();
@@ -661,14 +661,14 @@ 
 	 */
 	function updateCalendar($calendarId, PropPatch $propPatch) {
 		$supportedProperties = array_keys($this->propertyMap);
-		$supportedProperties[] = '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp';
+		$supportedProperties[] = '{'.Plugin::NS_CALDAV.'}schedule-calendar-transp';
 
 		$propPatch->handle($supportedProperties, function($mutations) use ($calendarId) {
 			$newValues = [];
 			foreach ($mutations as $propertyName => $propertyValue) {
 
 				switch ($propertyName) {
-					case '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' :
+					case '{'.Plugin::NS_CALDAV.'}schedule-calendar-transp' :
 						$fieldName = 'transparent';
 						$newValues[$fieldName] = $propertyValue->getValue() === 'transparent';
 						break;
@@ -778,16 +778,16 @@ 
 		$stmt = $query->execute();
 
 		$result = [];
-		foreach($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
+		foreach ($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
 			$result[] = [
 					'id'           => $row['id'],
 					'uri'          => $row['uri'],
 					'lastmodified' => $row['lastmodified'],
-					'etag'         => '"' . $row['etag'] . '"',
+					'etag'         => '"'.$row['etag'].'"',
 					'calendarid'   => $row['calendarid'],
-					'size'         => (int)$row['size'],
+					'size'         => (int) $row['size'],
 					'component'    => strtolower($row['componenttype']),
-					'classification'=> (int)$row['classification']
+					'classification'=> (int) $row['classification']
 			];
 		}
 
@@ -820,18 +820,18 @@ 
 		$stmt = $query->execute();
 		$row = $stmt->fetch(\PDO::FETCH_ASSOC);
 
-		if(!$row) return null;
+		if (!$row) return null;
 
 		return [
 				'id'            => $row['id'],
 				'uri'           => $row['uri'],
 				'lastmodified'  => $row['lastmodified'],
-				'etag'          => '"' . $row['etag'] . '"',
+				'etag'          => '"'.$row['etag'].'"',
 				'calendarid'    => $row['calendarid'],
-				'size'          => (int)$row['size'],
+				'size'          => (int) $row['size'],
 				'calendardata'  => $this->readBlob($row['calendardata']),
 				'component'     => strtolower($row['componenttype']),
-				'classification'=> (int)$row['classification']
+				'classification'=> (int) $row['classification']
 		];
 	}
 
@@ -870,12 +870,12 @@ 
 					'id'           => $row['id'],
 					'uri'          => $row['uri'],
 					'lastmodified' => $row['lastmodified'],
-					'etag'         => '"' . $row['etag'] . '"',
+					'etag'         => '"'.$row['etag'].'"',
 					'calendarid'   => $row['calendarid'],
-					'size'         => (int)$row['size'],
+					'size'         => (int) $row['size'],
 					'calendardata' => $this->readBlob($row['calendardata']),
 					'component'    => strtolower($row['componenttype']),
-					'classification' => (int)$row['classification']
+					'classification' => (int) $row['classification']
 				];
 			}
 			$result->closeCursor();
@@ -932,7 +932,7 @@ 
 		));
 		$this->addChange($calendarId, $objectUri, 1);
 
-		return '"' . $extraData['etag'] . '"';
+		return '"'.$extraData['etag'].'"';
 	}
 
 	/**
@@ -985,7 +985,7 @@ 
 		}
 		$this->addChange($calendarId, $objectUri, 2);
 
-		return '"' . $extraData['etag'] . '"';
+		return '"'.$extraData['etag'].'"';
 	}
 
 	/**
@@ -1136,7 +1136,7 @@ 
 		$stmt = $query->execute();
 
 		$result = [];
-		while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+		while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
 			if ($requirePostFilter) {
 				if (!$this->validateFilterForObject($row, $filters)) {
 					continue;
@@ -1179,7 +1179,7 @@ 
 		$stmt = $query->execute();
 
 		if ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-			return $row['calendaruri'] . '/' . $row['objecturi'];
+			return $row['calendaruri'].'/'.$row['objecturi'];
 		}
 
 		return null;
@@ -1244,7 +1244,7 @@ 
 	function getChangesForCalendar($calendarId, $syncToken, $syncLevel, $limit = null) {
 		// Current synctoken
 		$stmt = $this->db->prepare('SELECT `synctoken` FROM `*PREFIX*calendars` WHERE `id` = ?');
-		$stmt->execute([ $calendarId ]);
+		$stmt->execute([$calendarId]);
 		$currentToken = $stmt->fetchColumn(0);
 
 		if (is_null($currentToken)) {
@@ -1261,8 +1261,8 @@ 
 		if ($syncToken) {
 
 			$query = "SELECT `uri`, `operation` FROM `*PREFIX*calendarchanges` WHERE `synctoken` >= ? AND `synctoken` < ? AND `calendarid` = ? ORDER BY `synctoken`";
-			if ($limit>0) {
-				$query.= " `LIMIT` " . (int)$limit;
+			if ($limit > 0) {
+				$query .= " `LIMIT` ".(int) $limit;
 			}
 
 			// Fetching all changes
@@ -1273,15 +1273,15 @@ 
 
 			// This loop ensures that any duplicates are overwritten, only the
 			// last change on a node is relevant.
-			while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+			while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
 
 				$changes[$row['uri']] = $row['operation'];
 
 			}
 
-			foreach($changes as $uri => $operation) {
+			foreach ($changes as $uri => $operation) {
 
-				switch($operation) {
+				switch ($operation) {
 					case 1 :
 						$result['added'][] = $uri;
 						break;
@@ -1351,10 +1351,10 @@ 
 			->from('calendarsubscriptions')
 			->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
 			->orderBy('calendarorder', 'asc');
-		$stmt =$query->execute();
+		$stmt = $query->execute();
 
 		$subscriptions = [];
-		while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+		while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
 
 			$subscription = [
 				'id'           => $row['id'],
@@ -1363,10 +1363,10 @@ 
 				'source'       => $row['source'],
 				'lastmodified' => $row['lastmodified'],
 
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet(['VTODO', 'VEVENT']),
+				'{'.Plugin::NS_CALDAV.'}supported-calendar-component-set' => new SupportedCalendarComponentSet(['VTODO', 'VEVENT']),
 			];
 
-			foreach($this->subscriptionPropertyMap as $xmlName=>$dbName) {
+			foreach ($this->subscriptionPropertyMap as $xmlName=>$dbName) {
 				if (!is_null($row[$dbName])) {
 					$subscription[$xmlName] = $row[$dbName];
 				}
@@ -1405,7 +1405,7 @@ 
 
 		$propertiesBoolean = ['striptodos', 'stripalarms', 'stripattachments'];
 
-		foreach($this->subscriptionPropertyMap as $xmlName=>$dbName) {
+		foreach ($this->subscriptionPropertyMap as $xmlName=>$dbName) {
 			if (array_key_exists($xmlName, $properties)) {
 					$values[$dbName] = $properties[$xmlName];
 					if (in_array($dbName, $propertiesBoolean)) {
@@ -1453,7 +1453,7 @@ 
 
 			$newValues = [];
 
-			foreach($mutations as $propertyName=>$propertyValue) {
+			foreach ($mutations as $propertyName=>$propertyValue) {
 				if ($propertyName === '{http://calendarserver.org/ns/}source') {
 					$newValues['source'] = $propertyValue->getHref();
 				} else {
@@ -1465,7 +1465,7 @@ 
 			$query = $this->db->getQueryBuilder();
 			$query->update('calendarsubscriptions')
 				->set('lastmodified', $query->createNamedParameter(time()));
-			foreach($newValues as $fieldName=>$value) {
+			foreach ($newValues as $fieldName=>$value) {
 				$query->set($fieldName, $query->createNamedParameter($value));
 			}
 			$query->where($query->expr()->eq('id', $query->createNamedParameter($subscriptionId)))
@@ -1515,7 +1515,7 @@ 
 
 		$row = $stmt->fetch(\PDO::FETCH_ASSOC);
 
-		if(!$row) {
+		if (!$row) {
 			return null;
 		}
 
@@ -1523,8 +1523,8 @@ 
 				'uri'          => $row['uri'],
 				'calendardata' => $row['calendardata'],
 				'lastmodified' => $row['lastmodified'],
-				'etag'         => '"' . $row['etag'] . '"',
-				'size'         => (int)$row['size'],
+				'etag'         => '"'.$row['etag'].'"',
+				'size'         => (int) $row['size'],
 		];
 	}
 
@@ -1547,13 +1547,13 @@ 
 				->execute();
 
 		$result = [];
-		foreach($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
+		foreach ($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
 			$result[] = [
 					'calendardata' => $row['calendardata'],
 					'uri'          => $row['uri'],
 					'lastmodified' => $row['lastmodified'],
-					'etag'         => '"' . $row['etag'] . '"',
-					'size'         => (int)$row['size'],
+					'etag'         => '"'.$row['etag'].'"',
+					'size'         => (int) $row['size'],
 			];
 		}
 
@@ -1645,10 +1645,10 @@ 
 		$lastOccurrence = null;
 		$uid = null;
 		$classification = self::CLASSIFICATION_PUBLIC;
-		foreach($vObject->getComponents() as $component) {
-			if ($component->name!=='VTIMEZONE') {
+		foreach ($vObject->getComponents() as $component) {
+			if ($component->name !== 'VTIMEZONE') {
 				$componentType = $component->name;
-				$uid = (string)$component->UID;
+				$uid = (string) $component->UID;
 				break;
 			}
 		}
@@ -1673,13 +1673,13 @@ 
 					$lastOccurrence = $firstOccurrence;
 				}
 			} else {
-				$it = new EventIterator($vObject, (string)$component->UID);
+				$it = new EventIterator($vObject, (string) $component->UID);
 				$maxDate = new \DateTime(self::MAX_DATE);
 				if ($it->isInfinite()) {
 					$lastOccurrence = $maxDate->getTimestamp();
 				} else {
 					$end = $it->getDtEnd();
-					while($it->valid() && $end < $maxDate) {
+					while ($it->valid() && $end < $maxDate) {
 						$end = $it->getDtEnd();
 						$it->next();