Share::getItems() - Code Metrics - Inspection of "Merge pull request #25141 from owncloud/stable8-ba..." - owncloud/core - Measure and Improve Code Quality continuously with Scrutinizer

Completed
Push — stable8 ( 42720e...c45eda )

unknown
created 2016-06-16 11:09 UTC
Share::getItems() F

↳ Parent: Share
Complexity

Conditions	113
Paths	> 20000
Size

Total Lines	381
Code Lines	260
Duplication

Lines	5
Ratio	1.31 %
Importance

Changes
Metric	Value
cc	113
eloc	260
nc	4294967295
nop	11
dl	5
loc	381
rs	2
c	0
b	0
f	0
How to fix Long Method Complexity Many Parameters

<?php
/**
 * ownCloud
 *
 * @author Bjoern Schiessle, Michael Gapczynski
 * @copyright 2012 Michael Gapczynski <[email protected]>
 *            2014 Bjoern Schiessle <[email protected]>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
 *
 * You should have received a copy of the GNU Affero General Public
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */

namespace OC\Share;

use OCP\IUserSession;
use OC\DB\Connection;
use OCP\IConfig;

/**
 * This class provides the ability for apps to share their content between users.
 * Apps must create a backend class that implements OCP\Share_Backend and register it with this class.
 *
 * It provides the following hooks:
 *  - post_shared
 */
class Share extends \OC\Share\Constants {

	/** CRUDS permissions (Create, Read, Update, Delete, Share) using a bitmask
	 * Construct permissions for share() and setPermissions with Or (|) e.g.
	 * Give user read and update permissions: PERMISSION_READ | PERMISSION_UPDATE
	 *
	 * Check if permission is granted with And (&) e.g. Check if delete is
	 * granted: if ($permissions & PERMISSION_DELETE)
	 *
	 * Remove permissions with And (&) and Not (~) e.g. Remove the update
	 * permission: $permissions &= ~PERMISSION_UPDATE
	 *
	 * Apps are required to handle permissions on their own, this class only
	 * stores and manages the permissions of shares
	 * @see lib/public/constants.php
	 */

	/**
	 * Register a sharing backend class that implements OCP\Share_Backend for an item type
	 * @param string $itemType Item type
	 * @param string $class Backend class
	 * @param string $collectionOf (optional) Depends on item type
	 * @param array $supportedFileExtensions (optional) List of supported file extensions if this item type depends on files
	 * @return boolean true if backend is registered or false if error
	 */
	public static function registerBackend($itemType, $class, $collectionOf = null, $supportedFileExtensions = null) {
		if (self::isEnabled()) {
			if (!isset(self::$backendTypes[$itemType])) {
				self::$backendTypes[$itemType] = array(
					'class' => $class,
					'collectionOf' => $collectionOf,
					'supportedFileExtensions' => $supportedFileExtensions
				);
				if(count(self::$backendTypes) === 1) {
					\OC_Util::addScript('core', 'share');
					\OC_Util::addStyle('core', 'share');
				}
				return true;
			}
			\OC_Log::write('OCP\Share',
				'Sharing backend '.$class.' not registered, '.self::$backendTypes[$itemType]['class']
				.' is already registered for '.$itemType,
				\OC_Log::WARN);
		}
		return false;
	}

	/**
	 * Check if the Share API is enabled
	 * @return boolean true if enabled or false
	 *
	 * The Share API is enabled by default if not configured
	 */
	public static function isEnabled() {
		if (\OC_Appconfig::getValue('core', 'shareapi_enabled', 'yes') == 'yes') {
			return true;
		}
		return false;
	}

	/**
	 * Find which users can access a shared item
	 * @param string $path to the file
	 * @param string $ownerUser owner of the file
	 * @param boolean $includeOwner include owner to the list of users with access to the file
	 * @param boolean $returnUserPaths Return an array with the user => path map
	 * @return array
	 * @note $path needs to be relative to user data dir, e.g. 'file.txt'
	 *       not '/admin/data/file.txt'
	 */
	public static function getUsersSharingFile($path, $ownerUser, $includeOwner = false, $returnUserPaths = false) {

		$shares = $sharePaths = $fileTargets = array();
		$publicShare = false;
		$remoteShare = false;
		$source = -1;
		$cache = false;

		$view = new \OC\Files\View('/' . $ownerUser . '/files');
		if ($view->file_exists($path)) {
			$meta = $view->getFileInfo($path);
			$path = substr($meta->getPath(), strlen('/' . $ownerUser . '/files'));
		} else {
			// if the file doesn't exists yet we start with the parent folder
			$meta = $view->getFileInfo(dirname($path));
		}

		if($meta !== false) {
			$source = $meta['fileid'];
			$cache = new \OC\Files\Cache\Cache($meta['storage']);
		}

		while ($source !== -1) {
			// Fetch all shares with another user
			$query = \OC_DB::prepare(
				'SELECT `share_with`, `file_source`, `file_target`
				FROM
				`*PREFIX*share`
				WHERE
				`item_source` = ? AND `share_type` = ? AND `item_type` IN (\'file\', \'folder\')'
			);

			$result = $query->execute(array($source, self::SHARE_TYPE_USER));

			if (\OCP\DB::isError($result)) {
				\OCP\Util::writeLog('OCP\Share', \OC_DB::getErrorMessage($result), \OC_Log::ERROR);
			} else {
				while ($row = $result->fetchRow()) {
					$shares[] = $row['share_with'];
					if ($returnUserPaths) {
						$fileTargets[(int) $row['file_source']][$row['share_with']] = $row;
					}
				}
			}

			// We also need to take group shares into account
			$query = \OC_DB::prepare(
				'SELECT `share_with`, `file_source`, `file_target`
				FROM
				`*PREFIX*share`
				WHERE
				`item_source` = ? AND `share_type` = ? AND `item_type` IN (\'file\', \'folder\')'
			);

			$result = $query->execute(array($source, self::SHARE_TYPE_GROUP));

			if (\OCP\DB::isError($result)) {
				\OCP\Util::writeLog('OCP\Share', \OC_DB::getErrorMessage($result), \OC_Log::ERROR);
			} else {
				while ($row = $result->fetchRow()) {
					$usersInGroup = \OC_Group::usersInGroup($row['share_with']);
					$shares = array_merge($shares, $usersInGroup);
					if ($returnUserPaths) {
						foreach ($usersInGroup as $user) {
							$fileTargets[(int) $row['file_source']][$user] = $row;
						}
					}
				}
			}

			//check for public link shares
			if (!$publicShare) {

				$query = \OC_DB::prepare('
					SELECT `share_with`
					FROM `*PREFIX*share`
					WHERE `item_source` = ? AND `share_type` = ? AND `item_type` IN (\'file\', \'folder\')', 1
				);

				$result = $query->execute(array($source, self::SHARE_TYPE_LINK));

				if (\OCP\DB::isError($result)) {
					\OCP\Util::writeLog('OCP\Share', \OC_DB::getErrorMessage($result), \OCP\Util::ERROR);
				} else {
					if ($result->fetchRow()) {
						$publicShare = true;
					}
				}
			}

			//check for remote share
			if (!$remoteShare) {

				$query = \OC_DB::prepare('
					SELECT `share_with`
					FROM `*PREFIX*share`
					WHERE `item_source` = ? AND `share_type` = ? AND `item_type` IN (\'file\', \'folder\')', 1
				);

				$result = $query->execute(array($source, self::SHARE_TYPE_REMOTE));

				if (\OCP\DB::isError($result)) {
					\OCP\Util::writeLog('OCP\Share', \OC_DB::getErrorMessage($result), \OCP\Util::ERROR);
				} else {
					if ($result->fetchRow()) {
						$remoteShare = true;
					}
				}
			}

			// let's get the parent for the next round
			$meta = $cache->get((int)$source);
			if($meta !== false) {
				$source = (int)$meta['parent'];
			} else {
				$source = -1;
			}
		}

		// Include owner in list of users, if requested
		if ($includeOwner) {
			$shares[] = $ownerUser;
			if ($returnUserPaths) {
				$sharePaths[$ownerUser] = $path;
			}
		}

		if ($returnUserPaths) {
			$fileTargetIDs = array_keys($fileTargets);
			$fileTargetIDs = array_unique($fileTargetIDs);

			if (!empty($fileTargetIDs)) {
				$query = \OC_DB::prepare(
					'SELECT `fileid`, `path`
					FROM `*PREFIX*filecache`
					WHERE `fileid` IN (' . implode(',', $fileTargetIDs) . ')'
				);
				$result = $query->execute();

				if (\OCP\DB::isError($result)) {
					\OCP\Util::writeLog('OCP\Share', \OC_DB::getErrorMessage($result), \OC_Log::ERROR);
				} else {
					while ($row = $result->fetchRow()) {
						foreach ($fileTargets[$row['fileid']] as $uid => $shareData) {
							$sharedPath = $shareData['file_target'];
							$sharedPath .= substr($path, strlen($row['path']) -5);
							$sharePaths[$uid] = $sharedPath;
						}
					}
				}
			}

			return $sharePaths;
		}

		return array('users' => array_unique($shares), 'public' => $publicShare, 'remote' => $remoteShare);
	}

	/**
	 * Get the items of item type shared with the current user
	 * @param string $itemType
	 * @param int $format (optional) Format type must be defined by the backend
	 * @param mixed $parameters (optional)
	 * @param int $limit Number of items to return (optional) Returns all by default
	 * @param boolean $includeCollections (optional)
	 * @return mixed Return depends on format
	 */
	public static function getItemsSharedWith($itemType, $format = self::FORMAT_NONE,
											  $parameters = null, $limit = -1, $includeCollections = false) {
		return self::getItems($itemType, null, self::$shareTypeUserAndGroups, \OC_User::getUser(), null, $format,
			$parameters, $limit, $includeCollections);
	}

	/**
	 * Get the items of item type shared with a user
	 * @param string $itemType
	 * @param string $user id for which user we want the shares
	 * @param int $format (optional) Format type must be defined by the backend
	 * @param mixed $parameters (optional)
	 * @param int $limit Number of items to return (optional) Returns all by default
	 * @param boolean $includeCollections (optional)
	 * @return mixed Return depends on format
	 */
	public static function getItemsSharedWithUser($itemType, $user, $format = self::FORMAT_NONE,
												  $parameters = null, $limit = -1, $includeCollections = false) {
		return self::getItems($itemType, null, self::$shareTypeUserAndGroups, $user, null, $format,
			$parameters, $limit, $includeCollections);
	}

	/**
	 * Get the item of item type shared with the current user
	 * @param string $itemType
	 * @param string $itemTarget
	 * @param int $format (optional) Format type must be defined by the backend
	 * @param mixed $parameters (optional)
	 * @param boolean $includeCollections (optional)
	 * @return mixed Return depends on format
	 */
	public static function getItemSharedWith($itemType, $itemTarget, $format = self::FORMAT_NONE,
											 $parameters = null, $includeCollections = false) {
		return self::getItems($itemType, $itemTarget, self::$shareTypeUserAndGroups, \OC_User::getUser(), null, $format,
			$parameters, 1, $includeCollections);
	}

	/**
	 * Get the item of item type shared with a given user by source
	 * @param string $itemType
	 * @param string $itemSource
	 * @param string $user User to whom the item was shared
	 * @param string $owner Owner of the share
	 * @param int $shareType only look for a specific share type
	 * @return array Return list of items with file_target, permissions and expiration
	 */
	public static function getItemSharedWithUser($itemType, $itemSource, $user, $owner = null, $shareType = null) {
		$shares = array();
		$fileDependent = false;

		$where = 'WHERE';
		$fileDependentWhere = '';
		if ($itemType === 'file' || $itemType === 'folder') {
			$fileDependent = true;
			$column = 'file_source';
			$fileDependentWhere = 'INNER JOIN `*PREFIX*filecache` ON `file_source` = `*PREFIX*filecache`.`fileid` ';
			$fileDependentWhere .= 'INNER JOIN `*PREFIX*storages` ON `numeric_id` = `*PREFIX*filecache`.`storage` ';
		} else {
			$column = 'item_source';
		}

		$select = self::createSelectStatement(self::FORMAT_NONE, $fileDependent);

		$where .= ' `' . $column . '` = ? AND `item_type` = ? ';
		$arguments = array($itemSource, $itemType);
		// for link shares $user === null
		if ($user !== null) {
			$where .= ' AND `share_with` = ? ';
			$arguments[] = $user;
		}

		if ($shareType !== null) {
			$where .= ' AND `share_type` = ? ';
			$arguments[] = $shareType;
		}

		if ($owner !== null) {
			$where .= ' AND `uid_owner` = ? ';
			$arguments[] = $owner;
		}

		$query = \OC_DB::prepare('SELECT ' . $select . ' FROM `*PREFIX*share` '. $fileDependentWhere . $where);

		$result = \OC_DB::executeAudited($query, $arguments);

		while ($row = $result->fetchRow()) {
			if ($fileDependent && !self::isFileReachable($row['path'], $row['storage_id'])) {
				continue;
			}
			$shares[] = $row;
		}

		//if didn't found a result than let's look for a group share.
		if(empty($shares) && $user !== null) {
			$groups = \OC_Group::getUserGroups($user);

			if (!empty($groups)) {
				$where = $fileDependentWhere . ' WHERE `' . $column . '` = ? AND `item_type` = ? AND `share_with` in (?)';
				$arguments = array($itemSource, $itemType, $groups);
				$types = array(null, null, \Doctrine\DBAL\Connection::PARAM_STR_ARRAY);

				if ($owner !== null) {
					$where .= ' AND `uid_owner` = ?';
					$arguments[] = $owner;
					$types[] = null;
				}

				// TODO: inject connection, hopefully one day in the future when this
				// class isn't static anymore...
				$conn = \OC_DB::getConnection();
				$result = $conn->executeQuery(
					'SELECT ' . $select . ' FROM `*PREFIX*share` ' . $where,
					$arguments,
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
					$types
				);

				while ($row = $result->fetch()) {
					$shares[] = $row;
				}
			}
		}

		return $shares;

	}

	/**
	 * Get the item of item type shared with the current user by source
	 * @param string $itemType
	 * @param string $itemSource
	 * @param int $format (optional) Format type must be defined by the backend
	 * @param mixed $parameters
	 * @param boolean $includeCollections
	 * @param string $shareWith (optional) define against which user should be checked, default: current user
	 * @return array
	 */
	public static function getItemSharedWithBySource($itemType, $itemSource, $format = self::FORMAT_NONE,
													 $parameters = null, $includeCollections = false, $shareWith = null) {
		$shareWith = ($shareWith === null) ? \OC_User::getUser() : $shareWith;
		return self::getItems($itemType, $itemSource, self::$shareTypeUserAndGroups, $shareWith, null, $format,
			$parameters, 1, $includeCollections, true);
	}

	/**
	 * Get the item of item type shared by a link
	 * @param string $itemType
	 * @param string $itemSource
	 * @param string $uidOwner Owner of link
	 * @return array
	 */
	public static function getItemSharedWithByLink($itemType, $itemSource, $uidOwner) {
		return self::getItems($itemType, $itemSource, self::SHARE_TYPE_LINK, null, $uidOwner, self::FORMAT_NONE,
			null, 1);
	}

	/**
	 * Based on the given token the share information will be returned - password protected shares will be verified
	 * @param string $token
	 * @return array|boolean false will be returned in case the token is unknown or unauthorized
	 */
	public static function getShareByToken($token, $checkPasswordProtection = true) {
		$query = \OC_DB::prepare('SELECT * FROM `*PREFIX*share` WHERE `token` = ?', 1);
		$result = $query->execute(array($token));
		if (\OC_DB::isError($result)) {

			\OC_Log::write('OCP\Share', \OC_DB::getErrorMessage($result) . ', token=' . $token, \OC_Log::ERROR);
		}
		$row = $result->fetchRow();
		if ($row === false) {
			return false;
		}
		if (is_array($row) and self::expireItem($row)) {
			return false;
		}

		// password protected shares need to be authenticated
		if ($checkPasswordProtection && !\OCP\Share::checkPasswordProtectedShare($row)) {
			return false;
		}

		return $row;
	}

	/**
	 * resolves reshares down to the last real share
	 * @param array $linkItem
	 * @return array file owner
	 */
	public static function resolveReShare($linkItem)
	{
		if (isset($linkItem['parent'])) {
			$parent = $linkItem['parent'];
			while (isset($parent)) {

				$query = \OC_DB::prepare('SELECT * FROM `*PREFIX*share` WHERE `id` = ?', 1);
				$item = $query->execute(array($parent))->fetchRow();
				if (isset($item['parent'])) {
					$parent = $item['parent'];
				} else {
					return $item;
				}
			}
		}
		return $linkItem;
	}


	/**
	 * Get the shared items of item type owned by the current user
	 * @param string $itemType
	 * @param int $format (optional) Format type must be defined by the backend
	 * @param mixed $parameters
	 * @param int $limit Number of items to return (optional) Returns all by default
	 * @param boolean $includeCollections
	 * @return mixed Return depends on format
	 */
	public static function getItemsShared($itemType, $format = self::FORMAT_NONE, $parameters = null,
										  $limit = -1, $includeCollections = false) {
		return self::getItems($itemType, null, null, null, \OC_User::getUser(), $format,
			$parameters, $limit, $includeCollections);
	}

	/**
	 * Get the shared item of item type owned by the current user
	 * @param string $itemType
	 * @param string $itemSource
	 * @param int $format (optional) Format type must be defined by the backend
	 * @param mixed $parameters
	 * @param boolean $includeCollections
	 * @return mixed Return depends on format
	 */
	public static function getItemShared($itemType, $itemSource, $format = self::FORMAT_NONE,
										 $parameters = null, $includeCollections = false) {
		return self::getItems($itemType, $itemSource, null, null, \OC_User::getUser(), $format,
			$parameters, -1, $includeCollections);
	}

	/**
	 * Get all users an item is shared with
	 * @param string $itemType
	 * @param string $itemSource
	 * @param string $uidOwner
	 * @param boolean $includeCollections
	 * @param boolean $checkExpireDate
	 * @return array Return array of users
	 */
	public static function getUsersItemShared($itemType, $itemSource, $uidOwner, $includeCollections = false, $checkExpireDate = true) {

		$users = array();
		$items = self::getItems($itemType, $itemSource, null, null, $uidOwner, self::FORMAT_NONE, null, -1, $includeCollections, false, $checkExpireDate);
		if ($items) {

			foreach ($items as $item) {
				if ((int)$item['share_type'] === self::SHARE_TYPE_USER) {
					$users[] = $item['share_with'];
				} else if ((int)$item['share_type'] === self::SHARE_TYPE_GROUP) {
					$users = array_merge($users, \OC_Group::usersInGroup($item['share_with']));
				}
			}
		}
		return $users;
	}

	/**
	 * Share an item with a user, group, or via private link
	 * @param string $itemType
	 * @param string $itemSource
	 * @param int $shareType SHARE_TYPE_USER, SHARE_TYPE_GROUP, or SHARE_TYPE_LINK
	 * @param string $shareWith User or group the item is being shared with
	 * @param int $permissions CRUDS
	 * @param string $itemSourceName
	 * @param \DateTime $expirationDate
	 * @return boolean|string Returns true on success or false on failure, Returns token on success for links
	 * @throws \Exception
	 */
	public static function shareItem($itemType, $itemSource, $shareType, $shareWith, $permissions, $itemSourceName = null, \DateTime $expirationDate = null) {

		$backend = self::getBackend($itemType);
		$l = \OC::$server->getL10N('lib');

		if ($backend->isShareTypeAllowed($shareType) === false) {

			$message = 'Sharing %s failed, because the backend does not allow shares from type %i';
			$message_t = $l->t('Sharing %s failed, because the backend does not allow shares from type %i', array($itemSourceName, $shareType));
			\OC_Log::write('OCP\Share', sprintf($message, $itemSourceName, $shareType), \OC_Log::ERROR);
			throw new \Exception($message_t);
		}

		$uidOwner = \OC_User::getUser();
		$shareWithinGroupOnly = self::shareWithGroupMembersOnly();

		if (is_null($itemSourceName)) {
			$itemSourceName = $itemSource;
		}

		// check if file can be shared
		if ($itemType === 'file' or $itemType === 'folder') {
			$path = \OC\Files\Filesystem::getPath($itemSource);
			// verify that the file exists before we try to share it
			if (!$path) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
				$message = 'Sharing %s failed, because the file does not exist';
				$message_t = $l->t('Sharing %s failed, because the file does not exist', array($itemSourceName));
				\OC_Log::write('OCP\Share', sprintf($message, $itemSourceName), \OC_Log::ERROR);
				throw new \Exception($message_t);
			}
			// verify that the user has share permission
			if (!\OC\Files\Filesystem::isSharable($path)) {
				$message = 'You are not allowed to share %s';
				$message_t = $l->t('You are not allowed to share %s', array($itemSourceName));
				\OC_Log::write('OCP\Share', sprintf($message, $itemSourceName), \OC_Log::ERROR);
				throw new \Exception($message_t);
			}
		}

		//verify that we don't share a folder which already contains a share mount point
		if ($itemType === 'folder') {
			$path = '/' . $uidOwner . '/files' . \OC\Files\Filesystem::getPath($itemSource) . '/';
			$mountManager = \OC\Files\Filesystem::getMountManager();
			$mounts = $mountManager->findIn($path);
			foreach ($mounts as $mount) {
				if ($mount->getStorage()->instanceOfStorage('\OCA\Files_Sharing\ISharedStorage')) {
					$message = 'Sharing "' . $itemSourceName . '" failed, because it contains files shared with you!';
					\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
					throw new \Exception($message);
				}

			}
		}

		// single file shares should never have delete permissions
		if ($itemType === 'file') {
			$permissions = (int)$permissions & ~\OCP\Constants::PERMISSION_DELETE;
		}

		// Verify share type and sharing conditions are met
		if ($shareType === self::SHARE_TYPE_USER) {
			if ($shareWith == $uidOwner) {

				$message = 'Sharing %s failed, because the user %s is the item owner';
				$message_t = $l->t('Sharing %s failed, because the user %s is the item owner', array($itemSourceName, $shareWith));
				\OC_Log::write('OCP\Share', sprintf($message, $itemSourceName, $shareWith), \OC_Log::ERROR);
				throw new \Exception($message_t);
			}
			if (!\OC_User::userExists($shareWith)) {

				$message = 'Sharing %s failed, because the user %s does not exist';
				$message_t = $l->t('Sharing %s failed, because the user %s does not exist', array($itemSourceName, $shareWith));
				\OC_Log::write('OCP\Share', sprintf($message, $itemSourceName, $shareWith), \OC_Log::ERROR);
				throw new \Exception($message_t);
			}
			if ($shareWithinGroupOnly) {
				$inGroup = array_intersect(\OC_Group::getUserGroups($uidOwner), \OC_Group::getUserGroups($shareWith));
				if (empty($inGroup)) {

					$message = 'Sharing %s failed, because the user '
						.'%s is not a member of any groups that %s is a member of';
					$message_t = $l->t('Sharing %s failed, because the user %s is not a member of any groups that %s is a member of', array($itemSourceName, $shareWith, $uidOwner));
					\OC_Log::write('OCP\Share', sprintf($message, $itemSourceName, $shareWith, $uidOwner), \OC_Log::ERROR);
					throw new \Exception($message_t);
				}
			}
			// Check if the item source is already shared with the user, either from the same owner or a different user
			if ($checkExists = self::getItems($itemType, $itemSource, self::$shareTypeUserAndGroups,

				$shareWith, null, self::FORMAT_NONE, null, 1, true, true)) {
				// Only allow the same share to occur again if it is the same
				// owner and is not a user share, this use case is for increasing
				// permissions for a specific user
				if ($checkExists['uid_owner'] != $uidOwner || $checkExists['share_type'] == $shareType) {
					$message = 'Sharing %s failed, because this item is already shared with %s';
					$message_t = $l->t('Sharing %s failed, because this item is already shared with %s', array($itemSourceName, $shareWith));
					\OC_Log::write('OCP\Share', sprintf($message, $itemSourceName, $shareWith), \OC_Log::ERROR);
					throw new \Exception($message_t);
				}
			}
		} else if ($shareType === self::SHARE_TYPE_GROUP) {
			if (!\OC_Group::groupExists($shareWith)) {

				$message = 'Sharing %s failed, because the group %s does not exist';
				$message_t = $l->t('Sharing %s failed, because the group %s does not exist', array($itemSourceName, $shareWith));
				\OC_Log::write('OCP\Share', sprintf($message, $itemSourceName, $shareWith), \OC_Log::ERROR);
				throw new \Exception($message_t);
			}
			if ($shareWithinGroupOnly && !\OC_Group::inGroup($uidOwner, $shareWith)) {
				$message = 'Sharing %s failed, because '
					.'%s is not a member of the group %s';
				$message_t = $l->t('Sharing %s failed, because %s is not a member of the group %s', array($itemSourceName, $uidOwner, $shareWith));
				\OC_Log::write('OCP\Share', sprintf($message, $itemSourceName, $uidOwner, $shareWith), \OC_Log::ERROR);
				throw new \Exception($message_t);
			}
			// Check if the item source is already shared with the group, either from the same owner or a different user
			// The check for each user in the group is done inside the put() function
			if ($checkExists = self::getItems($itemType, $itemSource, self::SHARE_TYPE_GROUP, $shareWith,

				null, self::FORMAT_NONE, null, 1, true, true)) {
				// Only allow the same share to occur again if it is the same
				// owner and is not a group share, this use case is for increasing
				// permissions for a specific user
				if ($checkExists['uid_owner'] != $uidOwner || $checkExists['share_type'] == $shareType) {
					$message = 'Sharing %s failed, because this item is already shared with %s';
					$message_t = $l->t('Sharing %s failed, because this item is already shared with %s', array($itemSourceName, $shareWith));
					\OC_Log::write('OCP\Share', sprintf($message, $itemSourceName, $shareWith), \OC_Log::ERROR);
					throw new \Exception($message_t);
				}
			}
			// Convert share with into an array with the keys group and users
			$group = $shareWith;
			$shareWith = array();
			$shareWith['group'] = $group;
			$shareWith['users'] = array_diff(\OC_Group::usersInGroup($group), array($uidOwner));
		} else if ($shareType === self::SHARE_TYPE_LINK) {
			$updateExistingShare = false;
			if (\OC_Appconfig::getValue('core', 'shareapi_allow_links', 'yes') == 'yes') {

				// when updating a link share
				// FIXME Don't delete link if we update it
				if ($checkExists = self::getItems($itemType, $itemSource, self::SHARE_TYPE_LINK, null,
					$uidOwner, self::FORMAT_NONE, null, 1)) {
					// remember old token
					$oldToken = $checkExists['token'];
					$oldPermissions = $checkExists['permissions'];
					//delete the old share
					Helper::delete($checkExists['id']);
					$updateExistingShare = true;
				}

				// Generate hash of password - same method as user passwords
				if (!empty($shareWith)) {
					$shareWith = \OC::$server->getHasher()->hash($shareWith);
				} else {
					// reuse the already set password, but only if we change permissions
					// otherwise the user disabled the password protection
					if ($checkExists && (int)$permissions !== (int)$oldPermissions) {
function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

        case 'bar':
            $x = 2;
            break;
    }

    // $x is potentially undefined here.
    echo $x;
}
						$shareWith = $checkExists['share_with'];
					}
				}

				if (\OCP\Util::isPublicLinkPasswordRequired() && empty($shareWith)) {
					$message = 'You need to provide a password to create a public link, only protected links are allowed';
					$message_t = $l->t('You need to provide a password to create a public link, only protected links are allowed');
					\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
					throw new \Exception($message_t);
				}

				if ($updateExistingShare === false &&
					self::isDefaultExpireDateEnabled() &&
					empty($expirationDate)) {
					$expirationDate = Helper::calcExpireDate();
				}

				// Generate token
				if (isset($oldToken)) {
					$token = $oldToken;
				} else {
					$token = \OC::$server->getSecureRandom()->getMediumStrengthGenerator()->generate(self::TOKEN_LENGTH,
						\OCP\Security\ISecureRandom::CHAR_LOWER.\OCP\Security\ISecureRandom::CHAR_UPPER.
						\OCP\Security\ISecureRandom::CHAR_DIGITS
					);
				}
				$result = self::put($itemType, $itemSource, $shareType, $shareWith, $uidOwner, $permissions,
					null, $token, $itemSourceName, $expirationDate);
				if ($result) {
					return $token;
				} else {
					return false;
				}
			}
			$message = 'Sharing %s failed, because sharing with links is not allowed';
			$message_t = $l->t('Sharing %s failed, because sharing with links is not allowed', array($itemSourceName));
			\OC_Log::write('OCP\Share', sprintf($message, $itemSourceName), \OC_Log::ERROR);
			throw new \Exception($message_t);
		} else if ($shareType === self::SHARE_TYPE_REMOTE) {

			$shareWith = Helper::fixRemoteURLInShareWith($shareWith);

			// don't allow federated shares if source and target server are the same
			list($user, $remote) = Helper::splitUserRemote($shareWith);
			$currentServer = self::removeProtocolFromUrl(\OC::$server->getURLGenerator()->getAbsoluteURL('/'));
			$currentUser = \OC::$server->getUserSession()->getUser()->getUID();
			if (Helper::isSameUserOnSameServer($user, $remote, $currentUser, $currentServer)) {
				$message = 'Not allowed to create a federated share with the same user.';
				$message_t = $l->t('Not allowed to create a federated share with the same user');
				\OCP\Util::writeLog('OCP\Share', $message, \OCP\Util::DEBUG);
				throw new \Exception($message_t);
			}

			$token = \OC::$server->getSecureRandom()->getMediumStrengthGenerator()->generate(self::TOKEN_LENGTH, \OCP\Security\ISecureRandom::CHAR_LOWER . \OCP\Security\ISecureRandom::CHAR_UPPER .
				\OCP\Security\ISecureRandom::CHAR_DIGITS);

			$shareId = self::put($itemType, $itemSource, $shareType, $shareWith, $uidOwner, $permissions, null, $token, $itemSourceName);

			$send = false;
			if ($shareId) {
				$send = self::sendRemoteShare($token, $shareWith, $itemSourceName, $shareId, $uidOwner);
			}

			if ($send === false) {
				$currentUser = \OC::$server->getUserSession()->getUser()->getUID();
				self::unshare($itemType, $itemSource, $shareType, $shareWith, $currentUser);
				$message_t = $l->t('Sharing %s failed, could not find %s, maybe the server is currently unreachable.', array($itemSourceName, $shareWith));
				throw new \Exception($message_t);
			}

			return $send;
		} else {

			// Future share types need to include their own conditions
			$message = 'Share type %s is not valid for %s';
			$message_t = $l->t('Share type %s is not valid for %s', array($shareType, $itemSource));
			\OC_Log::write('OCP\Share', sprintf($message, $shareType, $itemSource), \OC_Log::ERROR);
			throw new \Exception($message_t);
		}

		// Put the item into the database
		$result = self::put($itemType, $itemSource, $shareType, $shareWith, $uidOwner, $permissions, null, null, $itemSourceName, $expirationDate);
/**
 * @return array|string
 */
function returnsDifferentValues($x) {
    if ($x) {
        return 'foo';
    }

    return array();
}

$x = returnsDifferentValues($y);
if (is_array($x)) {
    // $x is an array.
}

		return $result ? true : false;
	}

	/**
	 * Unshare an item from a user, group, or delete a private link
	 * @param string $itemType
	 * @param string $itemSource
	 * @param int $shareType SHARE_TYPE_USER, SHARE_TYPE_GROUP, or SHARE_TYPE_LINK
	 * @param string $shareWith User or group the item is being shared with
	 * @param string $owner owner of the share, if null the current user is used
	 * @return boolean true on success or false on failure
	 */
	public static function unshare($itemType, $itemSource, $shareType, $shareWith, $owner = null) {

		// check if it is a valid itemType
		self::getBackend($itemType);

		$items = self::getItemSharedWithUser($itemType, $itemSource, $shareWith, $owner, $shareType);

		$toDelete = array();
		$newParent = null;
		$currentUser = $owner ? $owner : \OC_User::getUser();
		foreach ($items as $item) {
			// delete the item with the expected share_type and owner
			if ((int)$item['share_type'] === (int)$shareType && $item['uid_owner'] === $currentUser) {
				$toDelete = $item;
				// if there is more then one result we don't have to delete the children
				// but update their parent. For group shares the new parent should always be
				// the original group share and not the db entry with the unique name
			} else if ((int)$item['share_type'] === self::$shareTypeGroupUserUnique) {
				$newParent = $item['parent'];
			} else {
				$newParent = $item['id'];
			}
		}

		if (!empty($toDelete)) {
			self::unshareItem($toDelete, $newParent);
			return true;
		}
		return false;
	}

	/**
	 * Unshare an item from all users, groups, and remove all links
	 * @param string $itemType
	 * @param string $itemSource
	 * @return boolean true on success or false on failure
	 */
	public static function unshareAll($itemType, $itemSource) {
		// Get all of the owners of shares of this item.
		$query = \OC_DB::prepare( 'SELECT `uid_owner` from `*PREFIX*share` WHERE `item_type`=? AND `item_source`=?' );
		$result = $query->execute(array($itemType, $itemSource));
		$shares = array();
		// Add each owner's shares to the array of all shares for this item.
		while ($row = $result->fetchRow()) {
			$shares = array_merge($shares, self::getItems($itemType, $itemSource, null, null, $row['uid_owner']));
		}
		if (!empty($shares)) {
			// Pass all the vars we have for now, they may be useful
			$hookParams = array(
				'itemType' => $itemType,
				'itemSource' => $itemSource,
				'shares' => $shares,
			);
			\OC_Hook::emit('OCP\Share', 'pre_unshareAll', $hookParams);
			foreach ($shares as $share) {
				self::unshareItem($share);
			}
			\OC_Hook::emit('OCP\Share', 'post_unshareAll', $hookParams);
			return true;
		}
		return false;
	}

	/**
	 * Unshare an item shared with the current user
	 * @param string $itemType
	 * @param string $itemOrigin Item target or source
	 * @param boolean $originIsSource true if $itemOrigin is the source, false if $itemOrigin is the target (optional)
	 * @return boolean true on success or false on failure
	 *
	 * Unsharing from self is not allowed for items inside collections
	 */
	public static function unshareFromSelf($itemType, $itemOrigin, $originIsSource = false) {
		$originType = ($originIsSource) ? 'source' : 'target';
		$uid = \OCP\User::getUser();

		if ($itemType === 'file' || $itemType === 'folder') {
			$statement = 'SELECT * FROM `*PREFIX*share` WHERE `item_type` = ? and `file_' . $originType . '` = ?';
		} else {
			$statement = 'SELECT * FROM `*PREFIX*share` WHERE `item_type` = ? and `item_' . $originType . '` = ?';
		}

		$query = \OCP\DB::prepare($statement);
		$result = $query->execute(array($itemType, $itemOrigin));

		$shares = $result->fetchAll();

		$listOfUnsharedItems = array();

		$itemUnshared = false;
		foreach ($shares as $share) {
			if ((int)$share['share_type'] === \OCP\Share::SHARE_TYPE_USER &&
				$share['share_with'] === $uid) {
				$deletedShares = Helper::delete($share['id']);
				$shareTmp = array(
					'id' => $share['id'],
					'shareWith' => $share['share_with'],
					'itemTarget' => $share['item_target'],
					'itemType' => $share['item_type'],
					'shareType' => (int)$share['share_type'],
				);
				if (isset($share['file_target'])) {
					$shareTmp['fileTarget'] = $share['file_target'];
				}
				$listOfUnsharedItems = array_merge($listOfUnsharedItems, $deletedShares, array($shareTmp));
				$itemUnshared = true;
				break;
			} elseif ((int)$share['share_type'] === \OCP\Share::SHARE_TYPE_GROUP) {
				if (\OC_Group::inGroup($uid, $share['share_with'])) {
					$groupShare = $share;
				}
			} elseif ((int)$share['share_type'] === self::$shareTypeGroupUserUnique &&
				$share['share_with'] === $uid) {
				$uniqueGroupShare = $share;
			}
		}

		if (!$itemUnshared && isset($groupShare) && !isset($uniqueGroupShare)) {
			$query = \OC_DB::prepare('INSERT INTO `*PREFIX*share`'
				.' (`item_type`, `item_source`, `item_target`, `parent`, `share_type`,'
				.' `share_with`, `uid_owner`, `permissions`, `stime`, `file_source`, `file_target`)'
				.' VALUES (?,?,?,?,?,?,?,?,?,?,?)');
			$query->execute(array($groupShare['item_type'], $groupShare['item_source'], $groupShare['item_target'],
				$groupShare['id'], self::$shareTypeGroupUserUnique,
				\OC_User::getUser(), $groupShare['uid_owner'], 0, $groupShare['stime'], $groupShare['file_source'],
				$groupShare['file_target']));
			$shareTmp = array(
				'id' => $groupShare['id'],
				'shareWith' => $groupShare['share_with'],
				'itemTarget' => $groupShare['item_target'],
				'itemType' => $groupShare['item_type'],
				'shareType' => (int)$groupShare['share_type'],
			);
			if (isset($groupShare['file_target'])) {
				$shareTmp['fileTarget'] = $groupShare['file_target'];
			}
			$listOfUnsharedItems = array_merge($listOfUnsharedItems, array($groupShare));
			$itemUnshared = true;
		} elseif (!$itemUnshared && isset($uniqueGroupShare)) {
			$query = \OC_DB::prepare('UPDATE `*PREFIX*share` SET `permissions` = ? WHERE `id` = ?');
			$query->execute(array(0, $uniqueGroupShare['id']));
			$shareTmp = array(
				'id' => $uniqueGroupShare['id'],
				'shareWith' => $uniqueGroupShare['share_with'],
				'itemTarget' => $uniqueGroupShare['item_target'],
				'itemType' => $uniqueGroupShare['item_type'],
				'shareType' => (int)$uniqueGroupShare['share_type'],
			);
			if (isset($uniqueGroupShare['file_target'])) {
				$shareTmp['fileTarget'] = $uniqueGroupShare['file_target'];
			}
			$listOfUnsharedItems = array_merge($listOfUnsharedItems, array($uniqueGroupShare));
			$itemUnshared = true;
		}

		if ($itemUnshared) {
			\OC_Hook::emit('OCP\Share', 'post_unshareFromSelf',
				array('unsharedItems' => $listOfUnsharedItems, 'itemType' => $itemType));
		}

		return $itemUnshared;
	}

	/**
	 * sent status if users got informed by mail about share
	 * @param string $itemType
	 * @param string $itemSource
	 * @param int $shareType SHARE_TYPE_USER, SHARE_TYPE_GROUP, or SHARE_TYPE_LINK
	 * @param string $recipient with whom was the file shared
	 * @param boolean $status
	 */
	public static function setSendMailStatus($itemType, $itemSource, $shareType, $recipient, $status) {
		$status = $status ? 1 : 0;

		$query = \OC_DB::prepare(
			'UPDATE `*PREFIX*share`
					SET `mail_send` = ?
					WHERE `item_type` = ? AND `item_source` = ? AND `share_type` = ? AND `share_with` = ?');

		$result = $query->execute(array($status, $itemType, $itemSource, $shareType, $recipient));

		if($result === false) {
			\OC_Log::write('OCP\Share', 'Couldn\'t set send mail status', \OC_Log::ERROR);
		}
	}

	/**
	 * Set the permissions of an item for a specific user or group
	 * @param string $itemType
	 * @param string $itemSource
	 * @param int $shareType SHARE_TYPE_USER, SHARE_TYPE_GROUP, or SHARE_TYPE_LINK
	 * @param string $shareWith User or group the item is being shared with
	 * @param int $permissions CRUDS permissions
	 * @return boolean true on success or false on failure
	 */
	public static function setPermissions($itemType, $itemSource, $shareType, $shareWith, $permissions) {
		$l = \OC::$server->getL10N('lib');
		if ($item = self::getItems($itemType, $itemSource, $shareType, $shareWith,
			\OC_User::getUser(), self::FORMAT_NONE, null, 1, false)) {
			// Check if this item is a reshare and verify that the permissions
			// granted don't exceed the parent shared item
			if (isset($item['parent'])) {
				$query = \OC_DB::prepare('SELECT `permissions` FROM `*PREFIX*share` WHERE `id` = ?', 1);
				$result = $query->execute(array($item['parent']))->fetchRow();
				if (~(int)$result['permissions'] & $permissions) {
					$message = 'Setting permissions for %s failed,'
						.' because the permissions exceed permissions granted to %s';
					$message_t = $l->t('Setting permissions for %s failed, because the permissions exceed permissions granted to %s', array($itemSource, \OC_User::getUser()));
					\OC_Log::write('OCP\Share', sprintf($message, $itemSource, \OC_User::getUser()), \OC_Log::ERROR);
					throw new \Exception($message_t);
				}
			}
			$query = \OC_DB::prepare('UPDATE `*PREFIX*share` SET `permissions` = ? WHERE `id` = ?');
			$query->execute(array($permissions, $item['id']));
			if ($itemType === 'file' || $itemType === 'folder') {
				\OC_Hook::emit('OCP\Share', 'post_update_permissions', array(
					'itemType' => $itemType,
					'itemSource' => $itemSource,
					'shareType' => $shareType,
					'shareWith' => $shareWith,
					'uidOwner' => \OC_User::getUser(),
					'permissions' => $permissions,
					'path' => $item['path'],
				));
			}
			// Check if permissions were removed
			if ($item['permissions'] & ~$permissions) {
				// If share permission is removed all reshares must be deleted
				if (($item['permissions'] & \OCP\Constants::PERMISSION_SHARE) && (~$permissions & \OCP\Constants::PERMISSION_SHARE)) {
					// delete all shares, keep parent and group children
					Helper::delete($item['id'], true, null, null, true);
				} else {
					$ids = array();
					$parents = array($item['id']);
					while (!empty($parents)) {
						$parents = "'".implode("','", $parents)."'";
						$query = \OC_DB::prepare('SELECT `id`, `permissions` FROM `*PREFIX*share`'
							.' WHERE `parent` IN ('.$parents.')');
						$result = $query->execute();
						// Reset parents array, only go through loop again if
						// items are found that need permissions removed
						$parents = array();
						while ($item = $result->fetchRow()) {
							// Check if permissions need to be removed
							if ($item['permissions'] & ~$permissions) {
								// Add to list of items that need permissions removed
								$ids[] = $item['id'];
								$parents[] = $item['id'];
							}
						}
					}
					// Remove the permissions for all reshares of this item
					if (!empty($ids)) {
						$ids = "'".implode("','", $ids)."'";
						// TODO this should be done with Doctrine platform objects
						if (\OC_Config::getValue( "dbtype") === 'oci') {
							$andOp = 'BITAND(`permissions`, ?)';
						} else {
							$andOp = '`permissions` & ?';
						}
						$query = \OC_DB::prepare('UPDATE `*PREFIX*share` SET `permissions` = '.$andOp
							.' WHERE `id` IN ('.$ids.')');
						$query->execute(array($permissions));
					}
				}
			}
			return true;
		}
		$message = 'Setting permissions for %s failed, because the item was not found';
		$message_t = $l->t('Setting permissions for %s failed, because the item was not found', array($itemSource));

		\OC_Log::write('OCP\Share', sprintf($message, $itemSource), \OC_Log::ERROR);
		throw new \Exception($message_t);
	}

	/**
	 * validate expiration date if it meets all constraints
	 *
	 * @param string $expireDate well formate date string, e.g. "DD-MM-YYYY"
	 * @param string $shareTime timestamp when the file was shared
	 * @param string $itemType
	 * @param string $itemSource
	 * @return DateTime validated date
	 * @throws \Exception
	 */
	private static function validateExpireDate($expireDate, $shareTime, $itemType, $itemSource) {
		$l = \OC::$server->getL10N('lib');
		$date = new \DateTime($expireDate);
		$today = new \DateTime('now');

		// if the user doesn't provide a share time we need to get it from the database
		// fall-back mode to keep API stable, because the $shareTime parameter was added later
		$defaultExpireDateEnforced = \OCP\Util::isDefaultExpireDateEnforced();
		if ($defaultExpireDateEnforced && $shareTime === null) {
			$items = self::getItemShared($itemType, $itemSource);
			$firstItem = reset($items);
			$shareTime = (int)$firstItem['stime'];
		}

		if ($defaultExpireDateEnforced) {
			// initialize max date with share time
			$maxDate = new \DateTime();
			$maxDate->setTimestamp($shareTime);
			$maxDays = \OCP\Config::getAppValue('core', 'shareapi_expire_after_n_days', '7');
			$maxDate->add(new \DateInterval('P' . $maxDays . 'D'));
			if ($date > $maxDate) {
				$warning = 'Cannot set expiration date. Shares cannot expire later than ' . $maxDays . ' after they have been shared';
				$warning_t = $l->t('Cannot set expiration date. Shares cannot expire later than %s after they have been shared', array($maxDays));
				\OCP\Util::writeLog('OCP\Share', $warning, \OCP\Util::WARN);
				throw new \Exception($warning_t);
			}
		}

		if ($date < $today) {

			$message = 'Cannot set expiration date. Expiration date is in the past';
			$message_t = $l->t('Cannot set expiration date. Expiration date is in the past');
			\OCP\Util::writeLog('OCP\Share', $message, \OCP\Util::WARN);
			throw new \Exception($message_t);
		}

		return $date;
	}

	/**
	 * Set expiration date for a share
	 * @param string $itemType
	 * @param string $itemSource
	 * @param string $date expiration date
	 * @param int $shareTime timestamp from when the file was shared
	 * @throws \Exception
	 * @return boolean
	 */
	public static function setExpirationDate($itemType, $itemSource, $date, $shareTime = null) {
		$user = \OC_User::getUser();
		$l = \OC::$server->getL10N('lib');

		if ($date == '') {
			if (\OCP\Util::isDefaultExpireDateEnforced()) {
				$warning = 'Cannot clear expiration date. Shares are required to have an expiration date.';
				$warning_t = $l->t('Cannot clear expiration date. Shares are required to have an expiration date.');
				\OCP\Util::writeLog('OCP\Share', $warning, \OCP\Util::WARN);
				throw new \Exception($warning_t);
			} else {
				$date = null;
			}
		} else {
			$date = self::validateExpireDate($date, $shareTime, $itemType, $itemSource);
		}
		$query = \OC_DB::prepare('UPDATE `*PREFIX*share` SET `expiration` = ? WHERE `item_type` = ? AND `item_source` = ?  AND `uid_owner` = ? AND `share_type` = ?');
		$query->bindValue(1, $date, 'datetime');
		$query->bindValue(2, $itemType);
		$query->bindValue(3, $itemSource);
		$query->bindValue(4, $user);
		$query->bindValue(5, \OCP\Share::SHARE_TYPE_LINK);

		$query->execute();

		\OC_Hook::emit('OCP\Share', 'post_set_expiration_date', array(
			'itemType' => $itemType,
			'itemSource' => $itemSource,
			'date' => $date,
			'uidOwner' => $user
		));

		return true;
	}

	/**
	 * Retrieve the owner of a connection
	 *
	 * @param Connection $connection
	 * @param int $shareId
	 * @throws \Exception
	 * @return string uid of share owner
	 */
	private static function getShareOwner(Connection $connection, $shareId) {
		$qb = $connection->createQueryBuilder();

		$qb->select('`uid_owner`')
			->from('`*PREFIX*share`')
			->where('`id` = :shareId')
			->setParameter(':shareId', $shareId);
		$result = $qb->execute();
		$result = $result->fetch();

		if (empty($result)) {
			throw new \Exception('Share not found');
		}

		return $result['uid_owner'];
	}

	/**
	 * Set expiration date for a share
	 *
	 * @param IUserSession $userSession
	 * @param Connection $connection
	 * @param IConfig $config
	 * @param int $shareId
	 * @param string $password
	 * @throws \Exception
	 * @return boolean
	 */
	public static function setPassword(IUserSession $userSession, 
	                                   Connection $connection,
	                                   IConfig $config,
	                                   $shareId, $password) {
		$user = $userSession->getUser();
		if (is_null($user)) {
			throw new \Exception("User not logged in");
		}

		$uid = self::getShareOwner($connection, $shareId);

		if ($uid !== $user->getUID()) {
			throw new \Exception('Cannot update share of a different user');
		}

		if ($password === '') {
			$password = null;
		}

		//If passwords are enforced the password can't be null
		if (self::enforcePassword($config) && is_null($password)) {
			throw new \Exception('Cannot remove password');
		}

		$qb = $connection->createQueryBuilder();
		$qb->update('`*PREFIX*share`')
			->set('`share_with`', ':pass')
			->where('`id` = :shareId')
			->setParameter(':pass', is_null($password) ? null : \OC::$server->getHasher()->hash($password))
			->setParameter(':shareId', $shareId);

		$qb->execute();

		return true;
	}

	/**
	 * Checks whether a share has expired, calls unshareItem() if yes.
	 * @param array $item Share data (usually database row)
	 * @return boolean True if item was expired, false otherwise.
	 */
	protected static function expireItem(array $item) {

		$result = false;

		// only use default expiration date for link shares
		if ((int) $item['share_type'] === self::SHARE_TYPE_LINK) {

			// calculate expiration date
			if (!empty($item['expiration'])) {
				$userDefinedExpire = new \DateTime($item['expiration']);
				$expires = $userDefinedExpire->getTimestamp();
			} else {
				$expires = null;
			}


			// get default expiration settings
			$defaultSettings = Helper::getDefaultExpireSetting();
			$expires = Helper::calculateExpireDate($defaultSettings, $item['stime'], $expires);


			if (is_int($expires)) {
				$now = time();
				if ($now > $expires) {
					self::unshareItem($item);
					$result = true;
				}
			}
		}
		return $result;
	}

	/**
	 * Unshares a share given a share data array
	 * @param array $item Share data (usually database row)
	 * @param int new parent ID
	 * @return null
	 */
	protected static function unshareItem(array $item, $newParent = null) {
		// Pass all the vars we have for now, they may be useful
		$hookParams = array(
			'id'            => $item['id'],
			'itemType'      => $item['item_type'],
			'itemSource'    => $item['item_source'],
			'shareType'     => (int)$item['share_type'],
			'shareWith'     => $item['share_with'],
			'itemParent'    => $item['parent'],
			'uidOwner'      => $item['uid_owner'],
		);
		if($item['item_type'] === 'file' || $item['item_type'] === 'folder') {
			$hookParams['fileSource'] = $item['file_source'];
			$hookParams['fileTarget'] = $item['file_target'];
		}

		\OC_Hook::emit('OCP\Share', 'pre_unshare', $hookParams);
		$deletedShares = Helper::delete($item['id'], false, null, $newParent);
		$deletedShares[] = $hookParams;
		$hookParams['deletedShares'] = $deletedShares;
		\OC_Hook::emit('OCP\Share', 'post_unshare', $hookParams);
		if ((int)$item['share_type'] === \OCP\Share::SHARE_TYPE_REMOTE && \OC::$server->getUserSession()->getUser()) {
			$urlParts = explode('@', $item['share_with'], 2);
			self::sendRemoteUnshare($urlParts[1], $item['id'], $item['token']);
		}
	}

	/**
	 * Get the backend class for the specified item type
	 * @param string $itemType
	 * @throws \Exception
	 * @return \OCP\Share_Backend
	 */
	public static function getBackend($itemType) {
		$l = \OC::$server->getL10N('lib');
		if (isset(self::$backends[$itemType])) {
			return self::$backends[$itemType];
		} else if (isset(self::$backendTypes[$itemType]['class'])) {
			$class = self::$backendTypes[$itemType]['class'];
			if (class_exists($class)) {
				self::$backends[$itemType] = new $class;
				if (!(self::$backends[$itemType] instanceof \OCP\Share_Backend)) {
					$message = 'Sharing backend %s must implement the interface OCP\Share_Backend';
					$message_t = $l->t('Sharing backend %s must implement the interface OCP\Share_Backend', array($class));
					\OC_Log::write('OCP\Share', sprintf($message, $class), \OC_Log::ERROR);
					throw new \Exception($message_t);
				}
				return self::$backends[$itemType];
			} else {

				$message = 'Sharing backend %s not found';
				$message_t = $l->t('Sharing backend %s not found', array($class));
				\OC_Log::write('OCP\Share', sprintf($message, $class), \OC_Log::ERROR);
				throw new \Exception($message_t);
			}
		}
		$message = 'Sharing backend for %s not found';
		$message_t = $l->t('Sharing backend for %s not found', array($itemType));
		\OC_Log::write('OCP\Share', sprintf($message, $itemType), \OC_Log::ERROR);
		throw new \Exception($message_t);
	}

	/**
	 * Check if resharing is allowed
	 * @return boolean true if allowed or false
	 *
	 * Resharing is allowed by default if not configured
	 */
	public static function isResharingAllowed() {
		if (!isset(self::$isResharingAllowed)) {
			if (\OC_Appconfig::getValue('core', 'shareapi_allow_resharing', 'yes') == 'yes') {
				self::$isResharingAllowed = true;
			} else {
				self::$isResharingAllowed = false;
			}
		}
		return self::$isResharingAllowed;
	}

	/**
	 * Get a list of collection item types for the specified item type
	 * @param string $itemType
	 * @return array
	 */
	private static function getCollectionItemTypes($itemType) {
		$collectionTypes = array($itemType);
		foreach (self::$backendTypes as $type => $backend) {
			if (in_array($backend['collectionOf'], $collectionTypes)) {
				$collectionTypes[] = $type;
			}
		}
		// TODO Add option for collections to be collection of themselves, only 'folder' does it now...
		if (isset(self::$backendTypes[$itemType]) && (!self::getBackend($itemType) instanceof \OCP\Share_Backend_Collection || $itemType != 'folder')) {
			unset($collectionTypes[0]);
		}
		// Return array if collections were found or the item type is a
		// collection itself - collections can be inside collections
		if (count($collectionTypes) > 0) {
			return $collectionTypes;
		}
		return false;
	}

	/**
	 * Get the owners of items shared with a user.
	 *
	 * @param string $user The user the items are shared with.
	 * @param string $type The type of the items shared with the user.
	 * @param boolean $includeCollections Include collection item types (optional)
	 * @param boolean $includeOwner include owner in the list of users the item is shared with (optional)
	 * @return array
	 */
	public static function getSharedItemsOwners($user, $type, $includeCollections = false, $includeOwner = false) {
		// First, we find out if $type is part of a collection (and if that collection is part of
		// another one and so on).
		$collectionTypes = array();
		if (!$includeCollections || !$collectionTypes = self::getCollectionItemTypes($type)) {
			$collectionTypes[] = $type;
		}

		// Of these collection types, along with our original $type, we make a
		// list of the ones for which a sharing backend has been registered.
		// FIXME: Ideally, we wouldn't need to nest getItemsSharedWith in this loop but just call it
		// with its $includeCollections parameter set to true. Unfortunately, this fails currently.
		$allMaybeSharedItems = array();
		foreach ($collectionTypes as $collectionType) {
$collection = json_decode($data, true);
if ( ! is_array($collection)) {
    throw new \RuntimeException('$collection must be an array.');
}

foreach ($collection as $item) { /** ... */ }
			if (isset(self::$backends[$collectionType])) {
				$allMaybeSharedItems[$collectionType] = self::getItemsSharedWithUser(
					$collectionType,
					$user,
					self::FORMAT_NONE
				);
			}
		}

		$owners = array();
		if ($includeOwner) {
			$owners[] = $user;
		}

		// We take a look at all shared items of the given $type (or of the collections it is part of)
		// and find out their owners. Then, we gather the tags for the original $type from all owners,
		// and return them as elements of a list that look like "Tag (owner)".
		foreach ($allMaybeSharedItems as $collectionType => $maybeSharedItems) {
			foreach ($maybeSharedItems as $sharedItem) {
				if (isset($sharedItem['id'])) { //workaround for https://github.com/owncloud/core/issues/2814
					$owners[] = $sharedItem['uid_owner'];
				}
			}
		}

		return $owners;
	}

	/**
	 * Get shared items from the database
	 * @param string $itemType
	 * @param string $item Item source or target (optional)
	 * @param int $shareType SHARE_TYPE_USER, SHARE_TYPE_GROUP, SHARE_TYPE_LINK, $shareTypeUserAndGroups, or $shareTypeGroupUserUnique
	 * @param string $shareWith User or group the item is being shared with
	 * @param string $uidOwner User that is the owner of shared items (optional)
	 * @param int $format Format to convert items to with formatItems() (optional)
	 * @param mixed $parameters to pass to formatItems() (optional)
	 * @param int $limit Number of items to return, -1 to return all matches (optional)
	 * @param boolean $includeCollections Include collection item types (optional)
	 * @param boolean $itemShareWithBySource (optional)
	 * @param boolean $checkExpireDate
	 * @return array
	 *
	 * See public functions getItem(s)... for parameter usage
	 *
	 */
	public static function getItems($itemType, $item = null, $shareType = null, $shareWith = null,
									$uidOwner = null, $format = self::FORMAT_NONE, $parameters = null, $limit = -1,
									$includeCollections = false, $itemShareWithBySource = false, $checkExpireDate  = true) {
		if (!self::isEnabled()) {
			return array();
		}
		$backend = self::getBackend($itemType);
		$collectionTypes = false;
		// Get filesystem root to add it to the file target and remove from the
		// file source, match file_source with the file cache
		if ($itemType == 'file' || $itemType == 'folder') {
			if(!is_null($uidOwner)) {
				$root = \OC\Files\Filesystem::getRoot();
			} else {
				$root = '';
			}
			$where = 'INNER JOIN `*PREFIX*filecache` ON `file_source` = `*PREFIX*filecache`.`fileid` ';
			if (!isset($item)) {
				$where .= ' AND `file_target` IS NOT NULL ';
			}
			$where .= 'INNER JOIN `*PREFIX*storages` ON `numeric_id` = `*PREFIX*filecache`.`storage` ';
			$fileDependent = true;
			$queryArgs = array();
		} else {
			$fileDependent = false;
			$root = '';
			$collectionTypes = self::getCollectionItemTypes($itemType);
			if ($includeCollections && !isset($item) && $collectionTypes) {
				// If includeCollections is true, find collections of this item type, e.g. a music album contains songs
				if (!in_array($itemType, $collectionTypes)) {
					$itemTypes = array_merge(array($itemType), $collectionTypes);
				} else {
					$itemTypes = $collectionTypes;
				}
				$placeholders = join(',', array_fill(0, count($itemTypes), '?'));
				$where = ' WHERE `item_type` IN ('.$placeholders.'))';
				$queryArgs = $itemTypes;
			} else {
				$where = ' WHERE `item_type` = ?';
				$queryArgs = array($itemType);
			}
		}
		if (\OC_Appconfig::getValue('core', 'shareapi_allow_links', 'yes') !== 'yes') {
			$where .= ' AND `share_type` != ?';
			$queryArgs[] = self::SHARE_TYPE_LINK;
		}
		if (isset($shareType)) {
			// Include all user and group items
			if ($shareType == self::$shareTypeUserAndGroups && isset($shareWith)) {
				$where .= ' AND ((`share_type` in (?, ?) AND `share_with` = ?) ';
				$queryArgs[] = self::SHARE_TYPE_USER;
				$queryArgs[] = self::$shareTypeGroupUserUnique;
				$queryArgs[] = $shareWith;
				$groups = \OC_Group::getUserGroups($shareWith);
				if (!empty($groups)) {
					$placeholders = join(',', array_fill(0, count($groups), '?'));
					$where .= ' OR (`share_type` = ? AND `share_with` IN ('.$placeholders.')) ';
					$queryArgs[] = self::SHARE_TYPE_GROUP;
					$queryArgs = array_merge($queryArgs, $groups);
				}
				$where .= ')';
				// Don't include own group shares
				$where .= ' AND `uid_owner` != ?';
				$queryArgs[] = $shareWith;
			} else {
				$where .= ' AND `share_type` = ?';
				$queryArgs[] = $shareType;
				if (isset($shareWith)) {
					$where .= ' AND `share_with` = ?';
					$queryArgs[] = $shareWith;
				}
			}
		}
		if (isset($uidOwner)) {
			$where .= ' AND `uid_owner` = ?';
			$queryArgs[] = $uidOwner;
			if (!isset($shareType)) {
				// Prevent unique user targets for group shares from being selected
				$where .= ' AND `share_type` != ?';
				$queryArgs[] = self::$shareTypeGroupUserUnique;
			}
			if ($fileDependent) {
				$column = 'file_source';
			} else {
				$column = 'item_source';
			}
		} else {
			if ($fileDependent) {
				$column = 'file_target';
			} else {
				$column = 'item_target';
			}
		}
		if (isset($item)) {
			$collectionTypes = self::getCollectionItemTypes($itemType);
			if ($includeCollections && $collectionTypes && !in_array('folder', $collectionTypes)) {
				$where .= ' AND (';
			} else {
				$where .= ' AND';
			}
			// If looking for own shared items, check item_source else check item_target
			if (isset($uidOwner) || $itemShareWithBySource) {
				// If item type is a file, file source needs to be checked in case the item was converted
				if ($fileDependent) {
					$where .= ' `file_source` = ?';
					$column = 'file_source';
				} else {
					$where .= ' `item_source` = ?';
					$column = 'item_source';
				}
			} else {
				if ($fileDependent) {
					$where .= ' `file_target` = ?';
					$item = \OC\Files\Filesystem::normalizePath($item);
				} else {
					$where .= ' `item_target` = ?';
				}
			}
			$queryArgs[] = $item;
			if ($includeCollections && $collectionTypes && !in_array('folder', $collectionTypes)) {
				$placeholders = join(',', array_fill(0, count($collectionTypes), '?'));
				$where .= ' OR `item_type` IN ('.$placeholders.'))';
				$queryArgs = array_merge($queryArgs, $collectionTypes);
			}
		}

		if ($shareType == self::$shareTypeUserAndGroups && $limit === 1) {
			// Make sure the unique user target is returned if it exists,
			// unique targets should follow the group share in the database
			// If the limit is not 1, the filtering can be done later
			$where .= ' ORDER BY `*PREFIX*share`.`id` DESC';
		} else {
			$where .= ' ORDER BY `*PREFIX*share`.`id` ASC';
		}

		if ($limit != -1 && !$includeCollections) {
			// The limit must be at least 3, because filtering needs to be done
			if ($limit < 3) {
				$queryLimit = 3;
			} else {
				$queryLimit = $limit;
			}
		} else {
			$queryLimit = null;
		}
		$select = self::createSelectStatement($format, $fileDependent, $uidOwner);
		$root = strlen($root);
		$query = \OC_DB::prepare('SELECT '.$select.' FROM `*PREFIX*share` '.$where, $queryLimit);
		$result = $query->execute($queryArgs);
		if (\OC_DB::isError($result)) {

			\OC_Log::write('OCP\Share',
				\OC_DB::getErrorMessage($result) . ', select=' . $select . ' where=',
				\OC_Log::ERROR);
		}
		$items = array();
		$targets = array();
		$switchedItems = array();
		$mounts = array();
		while ($row = $result->fetchRow()) {
			self::transformDBResults($row);
			// Filter out duplicate group shares for users with unique targets
			if ($fileDependent && !self::isFileReachable($row['path'], $row['storage_id'])) {
				continue;
			}
			if ($row['share_type'] == self::$shareTypeGroupUserUnique && isset($items[$row['parent']])) {
				$row['share_type'] = self::SHARE_TYPE_GROUP;
				$row['unique_name'] = true; // remember that we use a unique name for this user
				$row['share_with'] = $items[$row['parent']]['share_with'];
				// if the group share was unshared from the user we keep the permission, otherwise
				// we take the permission from the parent because this is always the up-to-date
				// permission for the group share
				if ($row['permissions'] > 0) {
					$row['permissions'] = $items[$row['parent']]['permissions'];
				}
				// Remove the parent group share
				unset($items[$row['parent']]);
				if ($row['permissions'] == 0) {
					continue;
				}
			} else if (!isset($uidOwner)) {
				// Check if the same target already exists
				if (isset($targets[$row['id']])) {
					// Check if the same owner shared with the user twice
					// through a group and user share - this is allowed
					$id = $targets[$row['id']];
					if (isset($items[$id]) && $items[$id]['uid_owner'] == $row['uid_owner']) {
						// Switch to group share type to ensure resharing conditions aren't bypassed
						if ($items[$id]['share_type'] != self::SHARE_TYPE_GROUP) {
							$items[$id]['share_type'] = self::SHARE_TYPE_GROUP;
							$items[$id]['share_with'] = $row['share_with'];
						}
						// Switch ids if sharing permission is granted on only
						// one share to ensure correct parent is used if resharing
						if (~(int)$items[$id]['permissions'] & \OCP\Constants::PERMISSION_SHARE
							&& (int)$row['permissions'] & \OCP\Constants::PERMISSION_SHARE) {
							$items[$row['id']] = $items[$id];
							$switchedItems[$id] = $row['id'];
							unset($items[$id]);
							$id = $row['id'];
						}
						$items[$id]['permissions'] |= (int)$row['permissions'];

					}
					continue;
				} elseif (!empty($row['parent'])) {
					$targets[$row['parent']] = $row['id'];
				}
			}
			// Remove root from file source paths if retrieving own shared items
			if (isset($uidOwner) && isset($row['path'])) {
				if (isset($row['parent'])) {
					$query = \OC_DB::prepare('SELECT `file_target` FROM `*PREFIX*share` WHERE `id` = ?');
					$parentResult = $query->execute(array($row['parent']));
					if (\OC_DB::isError($result)) {
						\OC_Log::write('OCP\Share', 'Can\'t select parent: ' .
							\OC_DB::getErrorMessage($result) . ', select=' . $select . ' where=' . $where,
							\OC_Log::ERROR);
					} else {
						$parentRow = $parentResult->fetchRow();
						$tmpPath = $parentRow['file_target'];
						// find the right position where the row path continues from the target path
						$pos = strrpos($row['path'], $parentRow['file_target']);
						$subPath = substr($row['path'], $pos);
						$splitPath = explode('/', $subPath);
						foreach (array_slice($splitPath, 2) as $pathPart) {
							$tmpPath = $tmpPath . '/' . $pathPart;
						}
						$row['path'] = $tmpPath;
					}
				} else {
					if (!isset($mounts[$row['storage']])) {
						$mountPoints = \OC\Files\Filesystem::getMountByNumericId($row['storage']);
						if (is_array($mountPoints) && !empty($mountPoints)) {
							$mounts[$row['storage']] = current($mountPoints);
						}
					}
					if (!empty($mounts[$row['storage']])) {
						$path = $mounts[$row['storage']]->getMountPoint().$row['path'];
						$relPath = substr($path, $root); // path relative to data/user
						$row['path'] = rtrim($relPath, '/');
					}
				}
			}

			if($checkExpireDate) {
				if (self::expireItem($row)) {
					continue;
				}
			}
			// Check if resharing is allowed, if not remove share permission
			if (isset($row['permissions']) && (!self::isResharingAllowed() | \OC_Util::isSharingDisabledForUser())) {
				$row['permissions'] &= ~\OCP\Constants::PERMISSION_SHARE;
			}
			// Add display names to result
			if ( isset($row['share_with']) && $row['share_with'] != '' &&
				isset($row['share_with']) && $row['share_type'] === self::SHARE_TYPE_USER) {
				$row['share_with_displayname'] = \OCP\User::getDisplayName($row['share_with']);
			} else {
				$row['share_with_displayname'] = $row['share_with'];
			}
			if ( isset($row['uid_owner']) && $row['uid_owner'] != '') {
				$row['displayname_owner'] = \OCP\User::getDisplayName($row['uid_owner']);
			}

			if ($row['permissions'] > 0) {
				$items[$row['id']] = $row;
			}

		}

		// group items if we are looking for items shared with the current user
		if (isset($shareWith) && $shareWith === \OCP\User::getUser()) {
			$items = self::groupItems($items, $itemType);
		}

		if (!empty($items)) {
			$collectionItems = array();
			foreach ($items as &$row) {
				// Return only the item instead of a 2-dimensional array
				if ($limit == 1 && $row[$column] == $item && ($row['item_type'] == $itemType || $itemType == 'file')) {
					if ($format == self::FORMAT_NONE) {
						return $row;
					} else {
						break;
					}
				}
				// Check if this is a collection of the requested item type
				if ($includeCollections && $collectionTypes && $row['item_type'] !== 'folder' && in_array($row['item_type'], $collectionTypes)) {
					if (($collectionBackend = self::getBackend($row['item_type']))
						&& $collectionBackend instanceof \OCP\Share_Backend_Collection) {
						// Collections can be inside collections, check if the item is a collection
						if (isset($item) && $row['item_type'] == $itemType && $row[$column] == $item) {
							$collectionItems[] = $row;
						} else {
							$collection = array();
							$collection['item_type'] = $row['item_type'];
							if ($row['item_type'] == 'file' || $row['item_type'] == 'folder') {
								$collection['path'] = basename($row['path']);
							}
							$row['collection'] = $collection;
							// Fetch all of the children sources
							$children = $collectionBackend->getChildren($row[$column]);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
							foreach ($children as $child) {
								$childItem = $row;
								$childItem['item_type'] = $itemType;
								if ($row['item_type'] != 'file' && $row['item_type'] != 'folder') {
									$childItem['item_source'] = $child['source'];
									$childItem['item_target'] = $child['target'];
								}
								if ($backend instanceof \OCP\Share_Backend_File_Dependent) {
									if ($row['item_type'] == 'file' || $row['item_type'] == 'folder') {
										$childItem['file_source'] = $child['source'];
									} else { // TODO is this really needed if we already know that we use the file backend?
										$meta = \OC\Files\Filesystem::getFileInfo($child['file_path']);
										$childItem['file_source'] = $meta['fileid'];
									}
									$childItem['file_target'] =
										\OC\Files\Filesystem::normalizePath($child['file_path']);
								}
								if (isset($item)) {
									if ($childItem[$column] == $item) {
										// Return only the item instead of a 2-dimensional array
										if ($limit == 1) {
											if ($format == self::FORMAT_NONE) {
												return $childItem;
											} else {
												// Unset the items array and break out of both loops
												$items = array();
												$items[] = $childItem;
												break 2;
											}
										} else {
											$collectionItems[] = $childItem;
										}
									}
								} else {
									$collectionItems[] = $childItem;
								}
							}
						}
					}
					// Remove collection item
					$toRemove = $row['id'];
					if (array_key_exists($toRemove, $switchedItems)) {
						$toRemove = $switchedItems[$toRemove];
					}
					unset($items[$toRemove]);
				} elseif ($includeCollections && $collectionTypes && in_array($row['item_type'], $collectionTypes)) {
					// FIXME: Thats a dirty hack to improve file sharing performance,
					// see github issue #10588 for more details
					// Need to find a solution which works for all back-ends
					$collectionBackend = self::getBackend($row['item_type']);
					$sharedParents = $collectionBackend->getParents($row['item_source']);
					foreach ($sharedParents as $parent) {
						$collectionItems[] = $parent;
					}
				}
			}
			if (!empty($collectionItems)) {
				$items = array_merge($items, $collectionItems);
			}

			return self::formatResult($items, $column, $backend, $format, $parameters);

		} elseif ($includeCollections && $collectionTypes && in_array('folder', $collectionTypes)) {
			// FIXME: Thats a dirty hack to improve file sharing performance,
			// see github issue #10588 for more details
			// Need to find a solution which works for all back-ends
			$collectionItems = array();
			$collectionBackend = self::getBackend('folder');
			$sharedParents = $collectionBackend->getParents($item, $shareWith, $uidOwner);
			foreach ($sharedParents as $parent) {
				$collectionItems[] = $parent;
			}
			if ($limit === 1) {
				return reset($collectionItems);
			}
			return self::formatResult($collectionItems, $column, $backend, $format, $parameters);

		}

		return array();
	}

	/**
	 * group items with link to the same source
	 *
	 * @param array $items
	 * @param string $itemType
	 * @return array of grouped items
	 */
	protected static function groupItems($items, $itemType) {

		$fileSharing = ($itemType === 'file' || $itemType === 'folder') ? true : false;

		$result = array();

		foreach ($items as $item) {
			$grouped = false;
			foreach ($result as $key => $r) {
				// for file/folder shares we need to compare file_source, otherwise we compare item_source
				// only group shares if they already point to the same target, otherwise the file where shared
				// before grouping of shares was added. In this case we don't group them toi avoid confusions
				if (( $fileSharing && $item['file_source'] === $r['file_source'] && $item['file_target'] === $r['file_target']) ||
					(!$fileSharing && $item['item_source'] === $r['item_source'] && $item['item_target'] === $r['item_target'])) {
					// add the first item to the list of grouped shares
					if (!isset($result[$key]['grouped'])) {
						$result[$key]['grouped'][] = $result[$key];
					}
					$result[$key]['permissions'] = (int) $item['permissions'] | (int) $r['permissions'];
					$result[$key]['grouped'][] = $item;
					$grouped = true;
					break;
				}
			}

			if (!$grouped) {
				$result[] = $item;
			}

		}

		return $result;
	}

	/**
	 * Put shared item into the database
	 * @param string $itemType Item type
	 * @param string $itemSource Item source
	 * @param int $shareType SHARE_TYPE_USER, SHARE_TYPE_GROUP, or SHARE_TYPE_LINK
	 * @param string $shareWith User or group the item is being shared with
	 * @param string $uidOwner User that is the owner of shared item
	 * @param int $permissions CRUDS permissions
	 * @param boolean|array $parentFolder Parent folder target (optional)
	 * @param string $token (optional)
	 * @param string $itemSourceName name of the source item (optional)
	 * @param \DateTime $expirationDate (optional)
	 * @throws \Exception
	 * @return mixed id of the new share or false
	 */
	private static function put($itemType, $itemSource, $shareType, $shareWith, $uidOwner,
								$permissions, $parentFolder = null, $token = null, $itemSourceName = null, \DateTime $expirationDate = null) {

		$queriesToExecute = array();
		$suggestedItemTarget = null;

		$result = self::checkReshare($itemType, $itemSource, $shareType, $shareWith, $uidOwner, $permissions, $itemSourceName, $expirationDate);
		if(!empty($result)) {
			$parent = $result['parent'];
			$itemSource = $result['itemSource'];
			$fileSource = $result['fileSource'];
			$suggestedItemTarget = $result['suggestedItemTarget'];
			$suggestedFileTarget = $result['suggestedFileTarget'];
			$filePath = $result['filePath'];
			$expirationDate = $result['expirationDate'];
		}

		$isGroupShare = false;
		if ($shareType == self::SHARE_TYPE_GROUP) {
			$isGroupShare = true;
			$users = \OC_Group::usersInGroup($shareWith['group']);
			// remove current user from list
			if (in_array(\OCP\User::getUser(), $users)) {
				unset($users[array_search(\OCP\User::getUser(), $users)]);
			}
			$groupItemTarget = Helper::generateTarget($itemType, $itemSource,
				$shareType, $shareWith['group'], $uidOwner, $suggestedItemTarget);
			$groupFileTarget = Helper::generateTarget($itemType, $itemSource,
				$shareType, $shareWith['group'], $uidOwner, $filePath);
function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

        case 'bar':
            $x = 2;
            break;
    }

    // $x is potentially undefined here.
    echo $x;
}

			// add group share to table and remember the id as parent
			$queriesToExecute['groupShare'] = array(
				'itemType'			=> $itemType,
				'itemSource'		=> $itemSource,
				'itemTarget'		=> $groupItemTarget,
				'shareType'			=> $shareType,
				'shareWith'			=> $shareWith['group'],
				'uidOwner'			=> $uidOwner,
				'permissions'		=> $permissions,
				'shareTime'			=> time(),
				'fileSource'		=> $fileSource,
function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

        case 'bar':
            $x = 2;
            break;
    }

    // $x is potentially undefined here.
    echo $x;
}
				'fileTarget'		=> $groupFileTarget,
				'token'				=> $token,
				'parent'			=> $parent,
function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

        case 'bar':
            $x = 2;
            break;
    }

    // $x is potentially undefined here.
    echo $x;
}
				'expiration'		=> $expirationDate,
			);

		} else {
			$users = array($shareWith);
			$itemTarget = Helper::generateTarget($itemType, $itemSource, $shareType, $shareWith, $uidOwner,
				$suggestedItemTarget);
		}

		$run = true;
		$error = '';
		$preHookData = array(
			'itemType' => $itemType,
			'itemSource' => $itemSource,
			'shareType' => $shareType,
			'uidOwner' => $uidOwner,
			'permissions' => $permissions,
			'fileSource' => $fileSource,
			'expiration' => $expirationDate,
			'token' => $token,
			'run' => &$run,
			'error' => &$error
		);

		$preHookData['itemTarget'] = ($isGroupShare) ? $groupItemTarget : $itemTarget;
function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

        case 'bar':
            $x = 2;
            break;
    }

    // $x is potentially undefined here.
    echo $x;
}
		$preHookData['shareWith'] = ($isGroupShare) ? $shareWith['group'] : $shareWith;

		\OC_Hook::emit('OCP\Share', 'pre_shared', $preHookData);

		if ($run === false) {
			throw new \Exception($error);
		}

		foreach ($users as $user) {
			$sourceId = ($itemType === 'file' || $itemType === 'folder') ? $fileSource : $itemSource;
			$sourceExists = self::getItemSharedWithBySource($itemType, $sourceId, self::FORMAT_NONE, null, true, $user);

			$userShareType = ($isGroupShare) ? self::$shareTypeGroupUserUnique : $shareType;

			if ($sourceExists) {

				$fileTarget = $sourceExists['file_target'];
				$itemTarget = $sourceExists['item_target'];

				// for group shares we don't need a additional entry if the target is the same
				if($isGroupShare && $groupItemTarget === $itemTarget) {
					continue;
				}

			} elseif(!$sourceExists && !$isGroupShare)  {


				$itemTarget = Helper::generateTarget($itemType, $itemSource, $userShareType, $user,
					$uidOwner, $suggestedItemTarget, $parent);
				if (isset($fileSource)) {
					if ($parentFolder) {
						if ($parentFolder === true) {
							$fileTarget = Helper::generateTarget('file', $filePath, $userShareType, $user,
								$uidOwner, $suggestedFileTarget, $parent);
function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

        case 'bar':
            $x = 2;
            break;
    }

    // $x is potentially undefined here.
    echo $x;
}
							if ($fileTarget != $groupFileTarget) {
function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

        case 'bar':
            $x = 2;
            break;
    }

    // $x is potentially undefined here.
    echo $x;
}
								$parentFolders[$user]['folder'] = $fileTarget;
foreach ($collection as $item) {
    $myArray['foo'] = $item->getFoo();

    if ($item->hasBar()) {
        $myArray['bar'] = $item->getBar();
    }

    // do something with $myArray
}
							}
						} else if (isset($parentFolder[$user])) {
							$fileTarget = $parentFolder[$user]['folder'].$itemSource;
							$parent = $parentFolder[$user]['id'];
						}
					} else {
						$fileTarget = Helper::generateTarget('file', $filePath, $userShareType,
							$user, $uidOwner, $suggestedFileTarget, $parent);
					}
				} else {
					$fileTarget = null;
				}

			} else {

				// group share which doesn't exists until now, check if we need a unique target for this user

				$itemTarget = Helper::generateTarget($itemType, $itemSource, self::SHARE_TYPE_USER, $user,
					$uidOwner, $suggestedItemTarget, $parent);

				// do we also need a file target
				if (isset($fileSource)) {
					$fileTarget = Helper::generateTarget('file', $filePath, self::SHARE_TYPE_USER, $user,
						$uidOwner, $suggestedFileTarget, $parent);
				} else {
					$fileTarget = null;
				}

				if ($itemTarget === $groupItemTarget && (isset($fileSource) && $fileTarget === $groupItemTarget)) {
					continue;
				}
			}

			$queriesToExecute[] = array(
				'itemType'			=> $itemType,
				'itemSource'		=> $itemSource,
				'itemTarget'		=> $itemTarget,
				'shareType'			=> $userShareType,
				'shareWith'			=> $user,
				'uidOwner'			=> $uidOwner,
				'permissions'		=> $permissions,
				'shareTime'			=> time(),
				'fileSource'		=> $fileSource,
				'fileTarget'		=> $fileTarget,
function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

        case 'bar':
            $x = 2;
            break;
    }

    // $x is potentially undefined here.
    echo $x;
}
				'token'				=> $token,
				'parent'			=> $parent,
				'expiration'		=> $expirationDate,
			);

		}

		$id = false;
		if ($isGroupShare) {
			$id = self::insertShare($queriesToExecute['groupShare']);
			// Save this id, any extra rows for this group share will need to reference it
			$parent = \OC_DB::insertid('*PREFIX*share');
			unset($queriesToExecute['groupShare']);
		}

		foreach ($queriesToExecute as $shareQuery) {
			$shareQuery['parent'] = $parent;
			$id = self::insertShare($shareQuery);
		}

		$postHookData = array(
			'itemType' => $itemType,
			'itemSource' => $itemSource,
			'parent' => $parent,
			'shareType' => $shareType,
			'uidOwner' => $uidOwner,
			'permissions' => $permissions,
			'fileSource' => $fileSource,
			'id' => $parent,
			'token' => $token,
			'expirationDate' => $expirationDate,
		);

		$postHookData['shareWith'] = ($isGroupShare) ? $shareWith['group'] : $shareWith;
		$postHookData['itemTarget'] = ($isGroupShare) ? $groupItemTarget : $itemTarget;
		$postHookData['fileTarget'] = ($isGroupShare) ? $groupFileTarget : $fileTarget;

		\OC_Hook::emit('OCP\Share', 'post_shared', $postHookData);


		return $id ? $id : false;
	}

	private static function checkReshare($itemType, $itemSource, $shareType, $shareWith, $uidOwner, $permissions, $itemSourceName, $expirationDate) {
		$backend = self::getBackend($itemType);

		$l = \OC::$server->getL10N('lib');
		$result = array();

		$column = ($itemType === 'file' || $itemType === 'folder') ? 'file_source' : 'item_source';

		$checkReshare = self::getItemSharedWithBySource($itemType, $itemSource, self::FORMAT_NONE, null, true);
		if ($checkReshare) {

			// Check if attempting to share back to owner
			if ($checkReshare['uid_owner'] == $shareWith && $shareType == self::SHARE_TYPE_USER) {
				$message = 'Sharing %s failed, because the user %s is the original sharer';
				$message_t = $l->t('Sharing %s failed, because the user %s is the original sharer', array($itemSourceName, $shareWith));

				\OC_Log::write('OCP\Share', sprintf($message, $itemSourceName, $shareWith), \OC_Log::ERROR);
				throw new \Exception($message_t);
			}
		}

		if ($checkReshare && $checkReshare['uid_owner'] !== \OC_User::getUser()) {

			// Check if share permissions is granted
			if (self::isResharingAllowed() && (int)$checkReshare['permissions'] & \OCP\Constants::PERMISSION_SHARE) {
				if (~(int)$checkReshare['permissions'] & $permissions) {
					$message = 'Sharing %s failed, because the permissions exceed permissions granted to %s';
					$message_t = $l->t('Sharing %s failed, because the permissions exceed permissions granted to %s', array($itemSourceName, $uidOwner));

					\OC_Log::write('OCP\Share', sprintf($message, $itemSourceName, $uidOwner), \OC_Log::ERROR);
					throw new \Exception($message_t);
				} else {
					// TODO Don't check if inside folder
					$result['parent'] = $checkReshare['id'];
					$result['expirationDate'] = min($expirationDate, $checkReshare['expiration']);
					// only suggest the same name as new target if it is a reshare of the
					// same file/folder and not the reshare of a child
					if ($checkReshare[$column] === $itemSource) {
						$result['filePath'] = $checkReshare['file_target'];
						$result['itemSource'] = $checkReshare['item_source'];
						$result['fileSource'] = $checkReshare['file_source'];
						$result['suggestedItemTarget'] = $checkReshare['item_target'];
						$result['suggestedFileTarget'] = $checkReshare['file_target'];
					} else {
						$result['filePath'] = ($backend instanceof \OCP\Share_Backend_File_Dependent) ? $backend->getFilePath($itemSource, $uidOwner) : null;
						$result['suggestedItemTarget'] = null;
						$result['suggestedFileTarget'] = null;
						$result['itemSource'] = $itemSource;
						$result['fileSource'] = ($backend instanceof \OCP\Share_Backend_File_Dependent) ? $itemSource : null;
					}
				}
			} else {

				$message = 'Sharing %s failed, because resharing is not allowed';
				$message_t = $l->t('Sharing %s failed, because resharing is not allowed', array($itemSourceName));

				\OC_Log::write('OCP\Share', sprintf($message, $itemSourceName), \OC_Log::ERROR);
				throw new \Exception($message_t);
			}
		} else {
			$result['parent'] = null;
			$result['suggestedItemTarget'] = null;
			$result['suggestedFileTarget'] = null;
			$result['itemSource'] = $itemSource;
			$result['expirationDate'] = $expirationDate;
			if (!$backend->isValidSource($itemSource, $uidOwner)) {
$a = canBeFalseAndNull();

// Instead of
if ( ! $a) { }

// Better use one of the explicit versions:
if ($a !== null) { }
if ($a !== false) { }
if ($a !== null && $a !== false) { }
				$message = 'Sharing %s failed, because the sharing backend for '
					.'%s could not find its source';
				$message_t = $l->t('Sharing %s failed, because the sharing backend for %s could not find its source', array($itemSource, $itemType));
				\OC_Log::write('OCP\Share', sprintf($message, $itemSource, $itemType), \OC_Log::ERROR);
				throw new \Exception($message_t);
			}
			if ($backend instanceof \OCP\Share_Backend_File_Dependent) {
				$result['filePath'] = $backend->getFilePath($itemSource, $uidOwner);
				if ($itemType == 'file' || $itemType == 'folder') {
					$result['fileSource'] = $itemSource;
				} else {
					$meta = \OC\Files\Filesystem::getFileInfo($result['filePath']);

					$result['fileSource'] = $meta['fileid'];
				}
				if ($result['fileSource'] == -1) {

					$message = 'Sharing %s failed, because the file could not be found in the file cache';
					$message_t = $l->t('Sharing %s failed, because the file could not be found in the file cache', array($itemSource));

					\OC_Log::write('OCP\Share', sprintf($message, $itemSource), \OC_Log::ERROR);
					throw new \Exception($message_t);
				}
			} else {
				$result['filePath'] = null;
				$result['fileSource'] = null;
			}
		}

		return $result;
	}

	/**
	 *
	 * @param array $shareData
	 * @return mixed false in case of a failure or the id of the new share
	 */
	private static function insertShare(array $shareData)
	{
		$query = \OC_DB::prepare('INSERT INTO `*PREFIX*share` ('
			.' `item_type`, `item_source`, `item_target`, `share_type`,'
			.' `share_with`, `uid_owner`, `permissions`, `stime`, `file_source`,'
			.' `file_target`, `token`, `parent`, `expiration`) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?)');
		$query->bindValue(1, $shareData['itemType']);
		$query->bindValue(2, $shareData['itemSource']);
		$query->bindValue(3, $shareData['itemTarget']);
		$query->bindValue(4, $shareData['shareType']);
		$query->bindValue(5, $shareData['shareWith']);
		$query->bindValue(6, $shareData['uidOwner']);
		$query->bindValue(7, $shareData['permissions']);
		$query->bindValue(8, $shareData['shareTime']);
		$query->bindValue(9, $shareData['fileSource']);
		$query->bindValue(10, $shareData['fileTarget']);
		$query->bindValue(11, $shareData['token']);
		$query->bindValue(12, $shareData['parent']);
		$query->bindValue(13, $shareData['expiration'], 'datetime');
		$result = $query->execute();

		$id = false;
		if ($result) {
			$id =  \OC::$server->getDatabaseConnection()->lastInsertId();
			// Fallback, if lastInterId() doesn't work we need to perform a select
			// to get the ID (seems to happen sometimes on Oracle)
			if (!$id) {
				$getId = \OC_DB::prepare('
					SELECT `id`
					FROM`*PREFIX*share`
					WHERE `uid_owner` = ? AND `item_target` = ? AND `item_source` = ? AND `stime` = ?
					');
				$r = $getId->execute(array($shareData['uidOwner'], $shareData['itemTarget'], $shareData['itemSource'], $shareData['shareTime']));
				if ($r) {
					$row = $r->fetchRow();
					$id = $row['id'];
				}
			}

		}

		return $id;

	}
	/**
	 * Delete all shares with type SHARE_TYPE_LINK
	 */
	public static function removeAllLinkShares() {
		// Delete any link shares
		$query = \OC_DB::prepare('SELECT `id` FROM `*PREFIX*share` WHERE `share_type` = ?');
		$result = $query->execute(array(self::SHARE_TYPE_LINK));
		while ($item = $result->fetchRow()) {
			Helper::delete($item['id']);
		}
	}

	/**
	 * In case a password protected link is not yet authenticated this function will return false
	 *
	 * @param array $linkItem
	 * @return boolean
	 */
	public static function checkPasswordProtectedShare(array $linkItem) {
		if (!isset($linkItem['share_with'])) {
			return true;
		}
		if (!isset($linkItem['share_type'])) {
			return true;
		}
		if (!isset($linkItem['id'])) {
			return true;
		}

		if ($linkItem['share_type'] != \OCP\Share::SHARE_TYPE_LINK) {
			return true;
		}

		if ( \OC::$server->getSession()->exists('public_link_authenticated')

			&& \OC::$server->getSession()->get('public_link_authenticated') === $linkItem['id'] ) {
			return true;
		}

		return false;
	}

	/**
	 * construct select statement
	 * @param int $format
	 * @param boolean $fileDependent ist it a file/folder share or a generla share
	 * @param string $uidOwner
	 * @return string select statement
	 */
	private static function createSelectStatement($format, $fileDependent, $uidOwner = null) {
		$select = '*';
		if ($format == self::FORMAT_STATUSES) {
			if ($fileDependent) {
				$select = '`*PREFIX*share`.`id`, `*PREFIX*share`.`parent`, `share_type`, `path`, `storage`, '
					. '`share_with`, `uid_owner` , `file_source`, `stime`, `*PREFIX*share`.`permissions`, '
					. '`*PREFIX*storages`.`id` AS `storage_id`';
			} else {
				$select = '`id`, `parent`, `share_type`, `share_with`, `uid_owner`, `item_source`, `stime`, `*PREFIX*share`.`permissions`';
			}
		} else {
			if (isset($uidOwner)) {
				if ($fileDependent) {
					$select = '`*PREFIX*share`.`id`, `item_type`, `item_source`, `*PREFIX*share`.`parent`,'
						. ' `share_type`, `share_with`, `file_source`, `file_target`, `path`, `*PREFIX*share`.`permissions`, `stime`,'
						. ' `expiration`, `token`, `storage`, `mail_send`, `uid_owner`, '
						. '`*PREFIX*storages`.`id` AS `storage_id`';
				} else {
					$select = '`id`, `item_type`, `item_source`, `parent`, `share_type`, `share_with`, `*PREFIX*share`.`permissions`,'
						. ' `stime`, `file_source`, `expiration`, `token`, `mail_send`, `uid_owner`';
				}
			} else {
				if ($fileDependent) {
					if ($format == \OC_Share_Backend_File::FORMAT_GET_FOLDER_CONTENTS || $format == \OC_Share_Backend_File::FORMAT_FILE_APP_ROOT) {
						$select = '`*PREFIX*share`.`id`, `item_type`, `item_source`, `*PREFIX*share`.`parent`, `uid_owner`, '
							. '`share_type`, `share_with`, `file_source`, `path`, `file_target`, `stime`, '
							. '`*PREFIX*share`.`permissions`, `expiration`, `storage`, `*PREFIX*filecache`.`parent` as `file_parent`, '
							. '`name`, `mtime`, `mimetype`, `mimepart`, `size`, `unencrypted_size`, `encrypted`, `etag`, `mail_send`';
					} else {
						$select = '`*PREFIX*share`.`id`, `item_type`, `item_source`, `item_target`,'
							. '`*PREFIX*share`.`parent`, `share_type`, `share_with`, `uid_owner`,'
							. '`file_source`, `path`, `file_target`, `*PREFIX*share`.`permissions`,'
						    . '`stime`, `expiration`, `token`, `storage`, `mail_send`,'
							. '`*PREFIX*storages`.`id` AS `storage_id`';
					}
				}
			}
		}
		return $select;
	}


	/**
	 * transform db results
	 * @param array $row result
	 */
	private static function transformDBResults(&$row) {
		if (isset($row['id'])) {
			$row['id'] = (int) $row['id'];
		}
		if (isset($row['share_type'])) {
			$row['share_type'] = (int) $row['share_type'];
		}
		if (isset($row['parent'])) {
			$row['parent'] = (int) $row['parent'];
		}
		if (isset($row['file_parent'])) {
			$row['file_parent'] = (int) $row['file_parent'];
		}
		if (isset($row['file_source'])) {
			$row['file_source'] = (int) $row['file_source'];
		}
		if (isset($row['permissions'])) {
			$row['permissions'] = (int) $row['permissions'];
		}
		if (isset($row['storage'])) {
			$row['storage'] = (int) $row['storage'];
		}
		if (isset($row['stime'])) {
			$row['stime'] = (int) $row['stime'];
		}
	}

	/**
	 * format result
	 * @param array $items result
	 * @param string $column is it a file share or a general share ('file_target' or 'item_target')
	 * @param \OCP\Share_Backend $backend sharing backend
	 * @param int $format
	 * @param array $parameters additional format parameters
	 * @return array format result
	 */
	private static function formatResult($items, $column, $backend, $format = self::FORMAT_NONE , $parameters = null) {
		if ($format === self::FORMAT_NONE) {
			return $items;
		} else if ($format === self::FORMAT_STATUSES) {
			$statuses = array();
			foreach ($items as $item) {
				if ($item['share_type'] === self::SHARE_TYPE_LINK) {
					$statuses[$item[$column]]['link'] = true;
				} else if (!isset($statuses[$item[$column]])) {
					$statuses[$item[$column]]['link'] = false;
				}
				if (!empty($item['file_target'])) {
					$statuses[$item[$column]]['path'] = $item['path'];
				}
			}
			return $statuses;
		} else {
			return $backend->formatItems($items, $format, $parameters);
		}
	}

	/**
	 * remove protocol from URL
	 *
	 * @param string $url
	 * @return string
	 */
	public static function removeProtocolFromUrl($url) {
		if (strpos($url, 'https://') === 0) {
			return substr($url, strlen('https://'));
		} else if (strpos($url, 'http://') === 0) {
			return substr($url, strlen('http://'));
		}

		return $url;
	}

	/**
	 * try http post first with https and then with http as a fallback
	 *
	 * @param string $url
	 * @param array $fields post parameters
	 * @return array
	 */
	private static function tryHttpPost($url, $fields) {
		$protocol = 'https://';
		$result = [
			'success' => false,
			'result' => '',
		];
		$try = 0;
		while ($result['success'] === false && $try < 2) {
			$result = \OC::$server->getHTTPHelper()->post($protocol . $url, $fields);
			$try++;
			$protocol = 'http://';
		}

		return $result;
	}

	/**
	 * send server-to-server share to remote server
	 *
	 * @param string $token
	 * @param string $shareWith
	 * @param string $name
	 * @param int $remote_id
	 * @param string $owner
	 * @return bool
	 */
	private static function sendRemoteShare($token, $shareWith, $name, $remote_id, $owner) {

		list($user, $remote) = explode('@', $shareWith, 2);

		if ($user && $remote) {
			$url = rtrim($remote, '/') . self::BASE_PATH_TO_SHARE_API . '?format=' . self::RESPONSE_FORMAT;

			$local = \OC::$server->getURLGenerator()->getAbsoluteURL('/');

			$fields = array(
				'shareWith' => $user,
				'token' => $token,
				'name' => $name,
				'remoteId' => $remote_id,
				'owner' => $owner,
				'remote' => $local,
			);

			$url = self::removeProtocolFromUrl($url);
			$result = self::tryHttpPost($url, $fields);
			$status = json_decode($result['result'], true);

			return ($result['success'] && $status['ocs']['meta']['statuscode'] === 100);

		}

		return false;
	}

	/**
	 * send server-to-server unshare to remote server
	 *
	 * @param string remote url
	 * @param int $id share id
	 * @param string $token
	 * @return bool
	 */
	private static function sendRemoteUnshare($remote, $id, $token) {
		$url = rtrim($remote, '/') . self::BASE_PATH_TO_SHARE_API . '/' . $id . '/unshare?format=' . self::RESPONSE_FORMAT;
		$fields = array('token' => $token, 'format' => 'json');
		$url = self::removeProtocolFromUrl($url);
		$result = self::tryHttpPost($url, $fields);
		$status = json_decode($result['result'], true);

		return ($result['success'] && $status['ocs']['meta']['statuscode'] === 100);
	}

	/**
	 * check if user can only share with group members
	 * @return bool
	 */
	public static function shareWithGroupMembersOnly() {
		$value = \OC_Appconfig::getValue('core', 'shareapi_only_share_with_group_members', 'no');
		return ($value === 'yes') ? true : false;
	}

	public static function isDefaultExpireDateEnabled() {
		$defaultExpireDateEnabled = \OCP\Config::getAppValue('core', 'shareapi_default_expire_date', 'no');
		return ($defaultExpireDateEnabled === "yes") ? true : false;
	}

	public static function enforceDefaultExpireDate() {
		$enforceDefaultExpireDate = \OCP\Config::getAppValue('core', 'shareapi_enforce_expire_date', 'no');
		return ($enforceDefaultExpireDate === "yes") ? true : false;
	}

	public static function getExpireInterval() {
		return (int)\OCP\Config::getAppValue('core', 'shareapi_expire_after_n_days', '7');
	}

	/**
	 * Checks whether the given path is reachable for the given owner
	 *
	 * @param string $path path relative to files
	 * @param string $ownerStorageId storage id of the owner
	 *
	 * @return boolean true if file is reachable, false otherwise
	 */
	private static function isFileReachable($path, $ownerStorageId) {
		// if outside the home storage, file is always considered reachable
		if (!(substr($ownerStorageId, 0, 6) === 'home::')) {
			return true;
		}

		// if inside the home storage, the file has to be under "/files/"
		$path = ltrim($path, '/');
		if (substr($path, 0, 6) === 'files/') {
			return true;
		}

		return false;
	}

	/**
	 * @param IConfig $config
	 * @return bool 
	 */
	public static function enforcePassword(IConfig $config) {
		$enforcePassword = $config->getAppValue('core', 'shareapi_enforce_links_password', 'no');
		return ($enforcePassword === "yes") ? true : false;
	}
}

Push — stable8 ( 42720e...c45eda )

Share::getItems() F

Complexity

Size

Duplication

Importance

How to fix Long Method Complexity Many Parameters

Long Method

Many Parameters

Available Fixes

Available Fixes

Available Fixes

Available Fixes

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Available Fixes

Available Fixes

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owncloud / core

Push — stable8 ( 42720e...c45eda )

Share::getItems() F

Complexity

Size

Duplication

Importance

How to fix Long Method Complexity Many Parameters

Long Method

Many Parameters

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

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