nextcloud / server

apps/dav/lib/Files/CustomPropertiesBackend.php

Indentation +253 added lines, -253 removed lines

@@ -34,258 +34,258 @@
 
 class CustomPropertiesBackend implements BackendInterface {
 
-	/**
-	 * Ignored properties
-	 *
-	 * @var array
-	 */
-	private $ignoredProperties = array(
-		'{DAV:}getcontentlength',
-		'{DAV:}getcontenttype',
-		'{DAV:}getetag',
-		'{DAV:}quota-used-bytes',
-		'{DAV:}quota-available-bytes',
-		'{http://owncloud.org/ns}permissions',
-		'{http://owncloud.org/ns}downloadURL',
-		'{http://owncloud.org/ns}dDC',
-		'{http://owncloud.org/ns}size',
-	);
-
-	/**
-	 * @var Tree
-	 */
-	private $tree;
-
-	/**
-	 * @var IDBConnection
-	 */
-	private $connection;
-
-	/**
-	 * @var string
-	 */
-	private $user;
-
-	/**
-	 * Properties cache
-	 *
-	 * @var array
-	 */
-	private $cache = [];
-
-	/**
-	 * @param Tree $tree node tree
-	 * @param IDBConnection $connection database connection
-	 * @param IUser $user owner of the tree and properties
-	 */
-	public function __construct(
-		Tree $tree,
-		IDBConnection $connection,
-		IUser $user) {
-		$this->tree = $tree;
-		$this->connection = $connection;
-		$this->user = $user->getUID();
-	}
-
-	/**
-	 * Fetches properties for a path.
-	 *
-	 * @param string $path
-	 * @param PropFind $propFind
-	 * @return void
-	 */
-	public function propFind($path, PropFind $propFind) {
-
-		$requestedProps = $propFind->get404Properties();
-
-		// these might appear
-		$requestedProps = array_diff(
-			$requestedProps,
-			$this->ignoredProperties
-		);
-
-		// substr of calendars/ => path is inside the CalDAV component
-		// two '/' => this a calendar (no calendar-home nor calendar object)
-		if (substr($path, 0, 10) === 'calendars/' && substr_count($path, '/') === 2) {
-			$allRequestedProps = $propFind->getRequestedProperties();
-			$customPropertiesForShares = [
-				'{DAV:}displayname',
-				'{urn:ietf:params:xml:ns:caldav}calendar-description',
-				'{urn:ietf:params:xml:ns:caldav}calendar-timezone',
-				'{http://apple.com/ns/ical/}calendar-order',
-				'{http://apple.com/ns/ical/}calendar-color',
-				'{urn:ietf:params:xml:ns:caldav}schedule-calendar-transp',
-			];
-
-			foreach ($customPropertiesForShares as $customPropertyForShares) {
-				if (in_array($customPropertyForShares, $allRequestedProps)) {
-					$requestedProps[] = $customPropertyForShares;
-				}
-			}
-		}
-
-		if (empty($requestedProps)) {
-			return;
-		}
-
-		$props = $this->getProperties($path, $requestedProps);
-		foreach ($props as $propName => $propValue) {
-			$propFind->set($propName, $propValue);
-		}
-	}
-
-	/**
-	 * Updates properties for a path
-	 *
-	 * @param string $path
-	 * @param PropPatch $propPatch
-	 *
-	 * @return void
-	 */
-	public function propPatch($path, PropPatch $propPatch) {
-		$propPatch->handleRemaining(function($changedProps) use ($path) {
-			return $this->updateProperties($path, $changedProps);
-		});
-	}
-
-	/**
-	 * This method is called after a node is deleted.
-	 *
-	 * @param string $path path of node for which to delete properties
-	 */
-	public function delete($path) {
-		$statement = $this->connection->prepare(
-			'DELETE FROM `*PREFIX*properties` WHERE `userid` = ? AND `propertypath` = ?'
-		);
-		$statement->execute(array($this->user, $path));
-		$statement->closeCursor();
-
-		unset($this->cache[$path]);
-	}
-
-	/**
-	 * This method is called after a successful MOVE
-	 *
-	 * @param string $source
-	 * @param string $destination
-	 *
-	 * @return void
-	 */
-	public function move($source, $destination) {
-		$statement = $this->connection->prepare(
-			'UPDATE `*PREFIX*properties` SET `propertypath` = ?' .
-			' WHERE `userid` = ? AND `propertypath` = ?'
-		);
-		$statement->execute(array($destination, $this->user, $source));
-		$statement->closeCursor();
-	}
-
-	/**
-	 * Returns a list of properties for this nodes.;
-	 * @param string $path
-	 * @param array $requestedProperties requested properties or empty array for "all"
-	 * @return array
-	 * @note The properties list is a list of propertynames the client
-	 * requested, encoded as xmlnamespace#tagName, for example:
-	 * http://www.example.org/namespace#author If the array is empty, all
-	 * properties should be returned
-	 */
-	private function getProperties($path, array $requestedProperties) {
-		if (isset($this->cache[$path])) {
-			return $this->cache[$path];
-		}
-
-		// TODO: chunking if more than 1000 properties
-		$sql = 'SELECT * FROM `*PREFIX*properties` WHERE `userid` = ? AND `propertypath` = ?';
-
-		$whereValues = array($this->user, $path);
-		$whereTypes = array(null, null);
-
-		if (!empty($requestedProperties)) {
-			// request only a subset
-			$sql .= ' AND `propertyname` in (?)';
-			$whereValues[] = $requestedProperties;
-			$whereTypes[] = \Doctrine\DBAL\Connection::PARAM_STR_ARRAY;
-		}
-
-		$result = $this->connection->executeQuery(
-			$sql,
-			$whereValues,
-			$whereTypes
-		);
-
-		$props = [];
-		while ($row = $result->fetch()) {
-			$props[$row['propertyname']] = $row['propertyvalue'];
-		}
-
-		$result->closeCursor();
-
-		$this->cache[$path] = $props;
-		return $props;
-	}
-
-	/**
-	 * Update properties
-	 *
-	 * @param string $path node for which to update properties
-	 * @param array $properties array of properties to update
-	 *
-	 * @return bool
-	 */
-	private function updateProperties($path, $properties) {
-
-		$deleteStatement = 'DELETE FROM `*PREFIX*properties`' .
-			' WHERE `userid` = ? AND `propertypath` = ? AND `propertyname` = ?';
-
-		$insertStatement = 'INSERT INTO `*PREFIX*properties`' .
-			' (`userid`,`propertypath`,`propertyname`,`propertyvalue`) VALUES(?,?,?,?)';
-
-		$updateStatement = 'UPDATE `*PREFIX*properties` SET `propertyvalue` = ?' .
-			' WHERE `userid` = ? AND `propertypath` = ? AND `propertyname` = ?';
-
-		// TODO: use "insert or update" strategy ?
-		$existing = $this->getProperties($path, array());
-		$this->connection->beginTransaction();
-		foreach ($properties as $propertyName => $propertyValue) {
-			// If it was null, we need to delete the property
-			if (is_null($propertyValue)) {
-				if (array_key_exists($propertyName, $existing)) {
-					$this->connection->executeUpdate($deleteStatement,
-						array(
-							$this->user,
-							$path,
-							$propertyName
-						)
-					);
-				}
-			} else {
-				if (!array_key_exists($propertyName, $existing)) {
-					$this->connection->executeUpdate($insertStatement,
-						array(
-							$this->user,
-							$path,
-							$propertyName,
-							$propertyValue
-						)
-					);
-				} else {
-					$this->connection->executeUpdate($updateStatement,
-						array(
-							$propertyValue,
-							$this->user,
-							$path,
-							$propertyName
-						)
-					);
-				}
-			}
-		}
-
-		$this->connection->commit();
-		unset($this->cache[$path]);
-
-		return true;
-	}
+    /**
+     * Ignored properties
+     *
+     * @var array
+     */
+    private $ignoredProperties = array(
+        '{DAV:}getcontentlength',
+        '{DAV:}getcontenttype',
+        '{DAV:}getetag',
+        '{DAV:}quota-used-bytes',
+        '{DAV:}quota-available-bytes',
+        '{http://owncloud.org/ns}permissions',
+        '{http://owncloud.org/ns}downloadURL',
+        '{http://owncloud.org/ns}dDC',
+        '{http://owncloud.org/ns}size',
+    );
+
+    /**
+     * @var Tree
+     */
+    private $tree;
+
+    /**
+     * @var IDBConnection
+     */
+    private $connection;
+
+    /**
+     * @var string
+     */
+    private $user;
+
+    /**
+     * Properties cache
+     *
+     * @var array
+     */
+    private $cache = [];
+
+    /**
+     * @param Tree $tree node tree
+     * @param IDBConnection $connection database connection
+     * @param IUser $user owner of the tree and properties
+     */
+    public function __construct(
+        Tree $tree,
+        IDBConnection $connection,
+        IUser $user) {
+        $this->tree = $tree;
+        $this->connection = $connection;
+        $this->user = $user->getUID();
+    }
+
+    /**
+     * Fetches properties for a path.
+     *
+     * @param string $path
+     * @param PropFind $propFind
+     * @return void
+     */
+    public function propFind($path, PropFind $propFind) {
+
+        $requestedProps = $propFind->get404Properties();
+
+        // these might appear
+        $requestedProps = array_diff(
+            $requestedProps,
+            $this->ignoredProperties
+        );
+
+        // substr of calendars/ => path is inside the CalDAV component
+        // two '/' => this a calendar (no calendar-home nor calendar object)
+        if (substr($path, 0, 10) === 'calendars/' && substr_count($path, '/') === 2) {
+            $allRequestedProps = $propFind->getRequestedProperties();
+            $customPropertiesForShares = [
+                '{DAV:}displayname',
+                '{urn:ietf:params:xml:ns:caldav}calendar-description',
+                '{urn:ietf:params:xml:ns:caldav}calendar-timezone',
+                '{http://apple.com/ns/ical/}calendar-order',
+                '{http://apple.com/ns/ical/}calendar-color',
+                '{urn:ietf:params:xml:ns:caldav}schedule-calendar-transp',
+            ];
+
+            foreach ($customPropertiesForShares as $customPropertyForShares) {
+                if (in_array($customPropertyForShares, $allRequestedProps)) {
+                    $requestedProps[] = $customPropertyForShares;
+                }
+            }
+        }
+
+        if (empty($requestedProps)) {
+            return;
+        }
+
+        $props = $this->getProperties($path, $requestedProps);
+        foreach ($props as $propName => $propValue) {
+            $propFind->set($propName, $propValue);
+        }
+    }
+
+    /**
+     * Updates properties for a path
+     *
+     * @param string $path
+     * @param PropPatch $propPatch
+     *
+     * @return void
+     */
+    public function propPatch($path, PropPatch $propPatch) {
+        $propPatch->handleRemaining(function($changedProps) use ($path) {
+            return $this->updateProperties($path, $changedProps);
+        });
+    }
+
+    /**
+     * This method is called after a node is deleted.
+     *
+     * @param string $path path of node for which to delete properties
+     */
+    public function delete($path) {
+        $statement = $this->connection->prepare(
+            'DELETE FROM `*PREFIX*properties` WHERE `userid` = ? AND `propertypath` = ?'
+        );
+        $statement->execute(array($this->user, $path));
+        $statement->closeCursor();
+
+        unset($this->cache[$path]);
+    }
+
+    /**
+     * This method is called after a successful MOVE
+     *
+     * @param string $source
+     * @param string $destination
+     *
+     * @return void
+     */
+    public function move($source, $destination) {
+        $statement = $this->connection->prepare(
+            'UPDATE `*PREFIX*properties` SET `propertypath` = ?' .
+            ' WHERE `userid` = ? AND `propertypath` = ?'
+        );
+        $statement->execute(array($destination, $this->user, $source));
+        $statement->closeCursor();
+    }
+
+    /**
+     * Returns a list of properties for this nodes.;
+     * @param string $path
+     * @param array $requestedProperties requested properties or empty array for "all"
+     * @return array
+     * @note The properties list is a list of propertynames the client
+     * requested, encoded as xmlnamespace#tagName, for example:
+     * http://www.example.org/namespace#author If the array is empty, all
+     * properties should be returned
+     */
+    private function getProperties($path, array $requestedProperties) {
+        if (isset($this->cache[$path])) {
+            return $this->cache[$path];
+        }
+
+        // TODO: chunking if more than 1000 properties
+        $sql = 'SELECT * FROM `*PREFIX*properties` WHERE `userid` = ? AND `propertypath` = ?';
+
+        $whereValues = array($this->user, $path);
+        $whereTypes = array(null, null);
+
+        if (!empty($requestedProperties)) {
+            // request only a subset
+            $sql .= ' AND `propertyname` in (?)';
+            $whereValues[] = $requestedProperties;
+            $whereTypes[] = \Doctrine\DBAL\Connection::PARAM_STR_ARRAY;
+        }
+
+        $result = $this->connection->executeQuery(
+            $sql,
+            $whereValues,
+            $whereTypes
+        );
+
+        $props = [];
+        while ($row = $result->fetch()) {
+            $props[$row['propertyname']] = $row['propertyvalue'];
+        }
+
+        $result->closeCursor();
+
+        $this->cache[$path] = $props;
+        return $props;
+    }
+
+    /**
+     * Update properties
+     *
+     * @param string $path node for which to update properties
+     * @param array $properties array of properties to update
+     *
+     * @return bool
+     */
+    private function updateProperties($path, $properties) {
+
+        $deleteStatement = 'DELETE FROM `*PREFIX*properties`' .
+            ' WHERE `userid` = ? AND `propertypath` = ? AND `propertyname` = ?';
+
+        $insertStatement = 'INSERT INTO `*PREFIX*properties`' .
+            ' (`userid`,`propertypath`,`propertyname`,`propertyvalue`) VALUES(?,?,?,?)';
+
+        $updateStatement = 'UPDATE `*PREFIX*properties` SET `propertyvalue` = ?' .
+            ' WHERE `userid` = ? AND `propertypath` = ? AND `propertyname` = ?';
+
+        // TODO: use "insert or update" strategy ?
+        $existing = $this->getProperties($path, array());
+        $this->connection->beginTransaction();
+        foreach ($properties as $propertyName => $propertyValue) {
+            // If it was null, we need to delete the property
+            if (is_null($propertyValue)) {
+                if (array_key_exists($propertyName, $existing)) {
+                    $this->connection->executeUpdate($deleteStatement,
+                        array(
+                            $this->user,
+                            $path,
+                            $propertyName
+                        )
+                    );
+                }
+            } else {
+                if (!array_key_exists($propertyName, $existing)) {
+                    $this->connection->executeUpdate($insertStatement,
+                        array(
+                            $this->user,
+                            $path,
+                            $propertyName,
+                            $propertyValue
+                        )
+                    );
+                } else {
+                    $this->connection->executeUpdate($updateStatement,
+                        array(
+                            $propertyValue,
+                            $this->user,
+                            $path,
+                            $propertyName
+                        )
+                    );
+                }
+            }
+        }
+
+        $this->connection->commit();
+        unset($this->cache[$path]);
+
+        return true;
+    }
 
 }

apps/dav/lib/CalDAV/Calendar.php

Indentation +261 added lines, -261 removed lines

@@ -32,266 +32,266 @@
 
 class Calendar extends \Sabre\CalDAV\Calendar implements IShareable {
 
-	public function __construct(BackendInterface $caldavBackend, $calendarInfo, IL10N $l10n) {
-		parent::__construct($caldavBackend, $calendarInfo);
-
-		if ($this->getName() === BirthdayService::BIRTHDAY_CALENDAR_URI) {
-			$this->calendarInfo['{DAV:}displayname'] = $l10n->t('Contact birthdays');
-		}
-		if ($this->getName() === CalDavBackend::PERSONAL_CALENDAR_URI &&
-			$this->calendarInfo['{DAV:}displayname'] === CalDavBackend::PERSONAL_CALENDAR_NAME) {
-			$this->calendarInfo['{DAV:}displayname'] = $l10n->t('Personal');
-		}
-	}
-
-	/**
-	 * Updates the list of shares.
-	 *
-	 * The first array is a list of people that are to be added to the
-	 * resource.
-	 *
-	 * Every element in the add array has the following properties:
-	 *   * href - A url. Usually a mailto: address
-	 *   * commonName - Usually a first and last name, or false
-	 *   * summary - A description of the share, can also be false
-	 *   * readOnly - A boolean value
-	 *
-	 * Every element in the remove array is just the address string.
-	 *
-	 * @param array $add
-	 * @param array $remove
-	 * @return void
-	 */
-	function updateShares(array $add, array $remove) {
-		/** @var CalDavBackend $calDavBackend */
-		$calDavBackend = $this->caldavBackend;
-		$calDavBackend->updateShares($this, $add, $remove);
-	}
-
-	/**
-	 * Returns the list of people whom this resource is shared with.
-	 *
-	 * Every element in this array should have the following properties:
-	 *   * href - Often a mailto: address
-	 *   * commonName - Optional, for example a first + last name
-	 *   * status - See the Sabre\CalDAV\SharingPlugin::STATUS_ constants.
-	 *   * readOnly - boolean
-	 *   * summary - Optional, a description for the share
-	 *
-	 * @return array
-	 */
-	function getShares() {
-		/** @var CalDavBackend $calDavBackend */
-		$calDavBackend = $this->caldavBackend;
-		return $calDavBackend->getShares($this->getResourceId());
-	}
-
-	/**
-	 * @return int
-	 */
-	public function getResourceId() {
-		return $this->calendarInfo['id'];
-	}
-
-	/**
-	 * @return string
-	 */
-	public function getPrincipalURI() {
-		return $this->calendarInfo['principaluri'];
-	}
-
-	function getACL() {
-		$acl =  [
-			[
-				'privilege' => '{DAV:}read',
-				'principal' => $this->getOwner(),
-				'protected' => true,
-			]];
-		if ($this->getName() !== BirthdayService::BIRTHDAY_CALENDAR_URI) {
-			$acl[] = [
-				'privilege' => '{DAV:}write',
-				'principal' => $this->getOwner(),
-				'protected' => true,
-			];
-		}
-		if ($this->getOwner() !== parent::getOwner()) {
-			$acl[] =  [
-					'privilege' => '{DAV:}read',
-					'principal' => parent::getOwner(),
-					'protected' => true,
-				];
-			if ($this->canWrite()) {
-				$acl[] = [
-					'privilege' => '{DAV:}write',
-					'principal' => parent::getOwner(),
-					'protected' => true,
-				];
-			}
-		}
-		if ($this->isPublic()) {
-			$acl[] = [
-				'privilege' => '{DAV:}read',
-				'principal' => 'principals/system/public',
-				'protected' => true,
-			];
-		}
-
-		/** @var CalDavBackend $calDavBackend */
-		$calDavBackend = $this->caldavBackend;
-		return $calDavBackend->applyShareAcl($this->getResourceId(), $acl);
-	}
-
-	function getChildACL() {
-		return $this->getACL();
-	}
-
-	function getOwner() {
-		if (isset($this->calendarInfo['{http://owncloud.org/ns}owner-principal'])) {
-			return $this->calendarInfo['{http://owncloud.org/ns}owner-principal'];
-		}
-		return parent::getOwner();
-	}
-
-	function delete() {
-		if (isset($this->calendarInfo['{http://owncloud.org/ns}owner-principal']) &&
-			$this->calendarInfo['{http://owncloud.org/ns}owner-principal'] !== $this->calendarInfo['principaluri']) {
-			$principal = 'principal:' . parent::getOwner();
-			$shares = $this->getShares();
-			$shares = array_filter($shares, function($share) use ($principal){
-				return $share['href'] === $principal;
-			});
-			if (empty($shares)) {
-				throw new Forbidden();
-			}
-
-			/** @var CalDavBackend $calDavBackend */
-			$calDavBackend = $this->caldavBackend;
-			$calDavBackend->updateShares($this, [], [
-				'href' => $principal
-			]);
-			return;
-		}
-		parent::delete();
-	}
-
-	function propPatch(PropPatch $propPatch) {
-		// parent::propPatch will only update calendars table
-		// if calendar is shared, changes have to be made to the properties table
-		if (!$this->isShared()) {
-			parent::propPatch($propPatch);
-		}
-	}
-
-	function getChild($name) {
-
-		$obj = $this->caldavBackend->getCalendarObject($this->calendarInfo['id'], $name);
-
-		if (!$obj) {
-			throw new NotFound('Calendar object not found');
-		}
-
-		if ($this->isShared() && $obj['classification'] === CalDavBackend::CLASSIFICATION_PRIVATE) {
-			throw new NotFound('Calendar object not found');
-		}
-
-		$obj['acl'] = $this->getChildACL();
-
-		return new CalendarObject($this->caldavBackend, $this->calendarInfo, $obj);
-
-	}
-
-	function getChildren() {
-
-		$objs = $this->caldavBackend->getCalendarObjects($this->calendarInfo['id']);
-		$children = [];
-		foreach ($objs as $obj) {
-			if ($this->isShared() && $obj['classification'] === CalDavBackend::CLASSIFICATION_PRIVATE) {
-				continue;
-			}
-			$obj['acl'] = $this->getChildACL();
-			$children[] = new CalendarObject($this->caldavBackend, $this->calendarInfo, $obj);
-		}
-		return $children;
-
-	}
-
-	function getMultipleChildren(array $paths) {
-
-		$objs = $this->caldavBackend->getMultipleCalendarObjects($this->calendarInfo['id'], $paths);
-		$children = [];
-		foreach ($objs as $obj) {
-			if ($this->isShared() && $obj['classification'] === CalDavBackend::CLASSIFICATION_PRIVATE) {
-				continue;
-			}
-			$obj['acl'] = $this->getChildACL();
-			$children[] = new CalendarObject($this->caldavBackend, $this->calendarInfo, $obj);
-		}
-		return $children;
-
-	}
-
-	function childExists($name) {
-		$obj = $this->caldavBackend->getCalendarObject($this->calendarInfo['id'], $name);
-		if (!$obj) {
-			return false;
-		}
-		if ($this->isShared() && $obj['classification'] === CalDavBackend::CLASSIFICATION_PRIVATE) {
-			return false;
-		}
-
-		return true;
-	}
-
-	function calendarQuery(array $filters) {
-
-		$uris = $this->caldavBackend->calendarQuery($this->calendarInfo['id'], $filters);
-		if ($this->isShared()) {
-			return array_filter($uris, function ($uri) {
-				return $this->childExists($uri);
-			});
-		}
-
-		return $uris;
-	}
-
-	/**
-	 * @param boolean $value
-	 * @return string|null
-	 */
-	function setPublishStatus($value) {
-		$publicUri = $this->caldavBackend->setPublishStatus($value, $this);
-		$this->calendarInfo['publicuri'] = $publicUri;
-		return $publicUri;
-	}
-
-	/**
-	 * @return mixed $value
-	 */
-	function getPublishStatus() {
-		return $this->caldavBackend->getPublishStatus($this);
-	}
-
-	private function canWrite() {
-		if (isset($this->calendarInfo['{http://owncloud.org/ns}read-only'])) {
-			return !$this->calendarInfo['{http://owncloud.org/ns}read-only'];
-		}
-		return true;
-	}
-
-	private function isPublic() {
-		return isset($this->calendarInfo['{http://owncloud.org/ns}public']);
-	}
-
-	private function isShared() {
-		if (!isset($this->calendarInfo['{http://owncloud.org/ns}owner-principal'])) {
-			return false;
-		}
-
-		return $this->calendarInfo['{http://owncloud.org/ns}owner-principal'] !== $this->calendarInfo['principaluri'];
-	}
-
-	public function isSubscription() {
-		return isset($this->calendarInfo['{http://calendarserver.org/ns/}source']);
-	}
+    public function __construct(BackendInterface $caldavBackend, $calendarInfo, IL10N $l10n) {
+        parent::__construct($caldavBackend, $calendarInfo);
+
+        if ($this->getName() === BirthdayService::BIRTHDAY_CALENDAR_URI) {
+            $this->calendarInfo['{DAV:}displayname'] = $l10n->t('Contact birthdays');
+        }
+        if ($this->getName() === CalDavBackend::PERSONAL_CALENDAR_URI &&
+            $this->calendarInfo['{DAV:}displayname'] === CalDavBackend::PERSONAL_CALENDAR_NAME) {
+            $this->calendarInfo['{DAV:}displayname'] = $l10n->t('Personal');
+        }
+    }
+
+    /**
+     * Updates the list of shares.
+     *
+     * The first array is a list of people that are to be added to the
+     * resource.
+     *
+     * Every element in the add array has the following properties:
+     *   * href - A url. Usually a mailto: address
+     *   * commonName - Usually a first and last name, or false
+     *   * summary - A description of the share, can also be false
+     *   * readOnly - A boolean value
+     *
+     * Every element in the remove array is just the address string.
+     *
+     * @param array $add
+     * @param array $remove
+     * @return void
+     */
+    function updateShares(array $add, array $remove) {
+        /** @var CalDavBackend $calDavBackend */
+        $calDavBackend = $this->caldavBackend;
+        $calDavBackend->updateShares($this, $add, $remove);
+    }
+
+    /**
+     * Returns the list of people whom this resource is shared with.
+     *
+     * Every element in this array should have the following properties:
+     *   * href - Often a mailto: address
+     *   * commonName - Optional, for example a first + last name
+     *   * status - See the Sabre\CalDAV\SharingPlugin::STATUS_ constants.
+     *   * readOnly - boolean
+     *   * summary - Optional, a description for the share
+     *
+     * @return array
+     */
+    function getShares() {
+        /** @var CalDavBackend $calDavBackend */
+        $calDavBackend = $this->caldavBackend;
+        return $calDavBackend->getShares($this->getResourceId());
+    }
+
+    /**
+     * @return int
+     */
+    public function getResourceId() {
+        return $this->calendarInfo['id'];
+    }
+
+    /**
+     * @return string
+     */
+    public function getPrincipalURI() {
+        return $this->calendarInfo['principaluri'];
+    }
+
+    function getACL() {
+        $acl =  [
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => $this->getOwner(),
+                'protected' => true,
+            ]];
+        if ($this->getName() !== BirthdayService::BIRTHDAY_CALENDAR_URI) {
+            $acl[] = [
+                'privilege' => '{DAV:}write',
+                'principal' => $this->getOwner(),
+                'protected' => true,
+            ];
+        }
+        if ($this->getOwner() !== parent::getOwner()) {
+            $acl[] =  [
+                    'privilege' => '{DAV:}read',
+                    'principal' => parent::getOwner(),
+                    'protected' => true,
+                ];
+            if ($this->canWrite()) {
+                $acl[] = [
+                    'privilege' => '{DAV:}write',
+                    'principal' => parent::getOwner(),
+                    'protected' => true,
+                ];
+            }
+        }
+        if ($this->isPublic()) {
+            $acl[] = [
+                'privilege' => '{DAV:}read',
+                'principal' => 'principals/system/public',
+                'protected' => true,
+            ];
+        }
+
+        /** @var CalDavBackend $calDavBackend */
+        $calDavBackend = $this->caldavBackend;
+        return $calDavBackend->applyShareAcl($this->getResourceId(), $acl);
+    }
+
+    function getChildACL() {
+        return $this->getACL();
+    }
+
+    function getOwner() {
+        if (isset($this->calendarInfo['{http://owncloud.org/ns}owner-principal'])) {
+            return $this->calendarInfo['{http://owncloud.org/ns}owner-principal'];
+        }
+        return parent::getOwner();
+    }
+
+    function delete() {
+        if (isset($this->calendarInfo['{http://owncloud.org/ns}owner-principal']) &&
+            $this->calendarInfo['{http://owncloud.org/ns}owner-principal'] !== $this->calendarInfo['principaluri']) {
+            $principal = 'principal:' . parent::getOwner();
+            $shares = $this->getShares();
+            $shares = array_filter($shares, function($share) use ($principal){
+                return $share['href'] === $principal;
+            });
+            if (empty($shares)) {
+                throw new Forbidden();
+            }
+
+            /** @var CalDavBackend $calDavBackend */
+            $calDavBackend = $this->caldavBackend;
+            $calDavBackend->updateShares($this, [], [
+                'href' => $principal
+            ]);
+            return;
+        }
+        parent::delete();
+    }
+
+    function propPatch(PropPatch $propPatch) {
+        // parent::propPatch will only update calendars table
+        // if calendar is shared, changes have to be made to the properties table
+        if (!$this->isShared()) {
+            parent::propPatch($propPatch);
+        }
+    }
+
+    function getChild($name) {
+
+        $obj = $this->caldavBackend->getCalendarObject($this->calendarInfo['id'], $name);
+
+        if (!$obj) {
+            throw new NotFound('Calendar object not found');
+        }
+
+        if ($this->isShared() && $obj['classification'] === CalDavBackend::CLASSIFICATION_PRIVATE) {
+            throw new NotFound('Calendar object not found');
+        }
+
+        $obj['acl'] = $this->getChildACL();
+
+        return new CalendarObject($this->caldavBackend, $this->calendarInfo, $obj);
+
+    }
+
+    function getChildren() {
+
+        $objs = $this->caldavBackend->getCalendarObjects($this->calendarInfo['id']);
+        $children = [];
+        foreach ($objs as $obj) {
+            if ($this->isShared() && $obj['classification'] === CalDavBackend::CLASSIFICATION_PRIVATE) {
+                continue;
+            }
+            $obj['acl'] = $this->getChildACL();
+            $children[] = new CalendarObject($this->caldavBackend, $this->calendarInfo, $obj);
+        }
+        return $children;
+
+    }
+
+    function getMultipleChildren(array $paths) {
+
+        $objs = $this->caldavBackend->getMultipleCalendarObjects($this->calendarInfo['id'], $paths);
+        $children = [];
+        foreach ($objs as $obj) {
+            if ($this->isShared() && $obj['classification'] === CalDavBackend::CLASSIFICATION_PRIVATE) {
+                continue;
+            }
+            $obj['acl'] = $this->getChildACL();
+            $children[] = new CalendarObject($this->caldavBackend, $this->calendarInfo, $obj);
+        }
+        return $children;
+
+    }
+
+    function childExists($name) {
+        $obj = $this->caldavBackend->getCalendarObject($this->calendarInfo['id'], $name);
+        if (!$obj) {
+            return false;
+        }
+        if ($this->isShared() && $obj['classification'] === CalDavBackend::CLASSIFICATION_PRIVATE) {
+            return false;
+        }
+
+        return true;
+    }
+
+    function calendarQuery(array $filters) {
+
+        $uris = $this->caldavBackend->calendarQuery($this->calendarInfo['id'], $filters);
+        if ($this->isShared()) {
+            return array_filter($uris, function ($uri) {
+                return $this->childExists($uri);
+            });
+        }
+
+        return $uris;
+    }
+
+    /**
+     * @param boolean $value
+     * @return string|null
+     */
+    function setPublishStatus($value) {
+        $publicUri = $this->caldavBackend->setPublishStatus($value, $this);
+        $this->calendarInfo['publicuri'] = $publicUri;
+        return $publicUri;
+    }
+
+    /**
+     * @return mixed $value
+     */
+    function getPublishStatus() {
+        return $this->caldavBackend->getPublishStatus($this);
+    }
+
+    private function canWrite() {
+        if (isset($this->calendarInfo['{http://owncloud.org/ns}read-only'])) {
+            return !$this->calendarInfo['{http://owncloud.org/ns}read-only'];
+        }
+        return true;
+    }
+
+    private function isPublic() {
+        return isset($this->calendarInfo['{http://owncloud.org/ns}public']);
+    }
+
+    private function isShared() {
+        if (!isset($this->calendarInfo['{http://owncloud.org/ns}owner-principal'])) {
+            return false;
+        }
+
+        return $this->calendarInfo['{http://owncloud.org/ns}owner-principal'] !== $this->calendarInfo['principaluri'];
+    }
+
+    public function isSubscription() {
+        return isset($this->calendarInfo['{http://calendarserver.org/ns/}source']);
+    }
 
 }