1 files changed, 336 insertions, 0 deletions
diff --git a/lib/private/legacy/group/database.php b/lib/private/legacy/group/database.php
new file mode 100644
index 00000000000..9ea0bbb8242
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+++ b/lib/private/legacy/group/database.php
@@ -0,0 +1,336 @@
+<?php
+/**
+ * @author Arthur Schiwon <blizzz@owncloud.com>
+ * @author Bart Visscher <bartv@thisnet.nl>
+ * @author Jakob Sack <mail@jakobsack.de>
+ * @author Joas Schilling <nickvergessen@owncloud.com>
+ * @author Jörn Friedrich Dreyer <jfd@butonic.de>
+ * @author Michael Gapczynski <GapczynskiM@gmail.com>
+ * @author michag86 <micha_g@arcor.de>
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @author Robin Appelman <icewind@owncloud.com>
+ * @author Robin McCorkell <robin@mccorkell.me.uk>
+ * @author Roeland Jago Douma <rullzer@owncloud.com>
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+/*
+ *
+ * The following SQL statement is just a help for developers and will not be
+ * executed!
+ *
+ * CREATE TABLE `groups` (
+ *   `gid` varchar(64) COLLATE utf8_unicode_ci NOT NULL,
+ *   PRIMARY KEY (`gid`)
+ * ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
+ *
+ * CREATE TABLE `group_user` (
+ *   `gid` varchar(64) COLLATE utf8_unicode_ci NOT NULL,
+ *   `uid` varchar(64) COLLATE utf8_unicode_ci NOT NULL
+ * ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
+ *
+ */
+
+/**
+ * Class for group management in a SQL Database (e.g. MySQL, SQLite)
+ */
+class OC_Group_Database extends OC_Group_Backend {
+
+	/** @var string[] */
+	private $groupCache = [];
+
+	/** @var \OCP\IDBConnection */
+	private $dbConn;
+
+	/**
+	 * OC_Group_Database constructor.
+	 *
+	 * @param \OCP\IDBConnection|null $dbConn
+	 */
+	public function __construct(\OCP\IDBConnection $dbConn = null) {
+		$this->dbConn = $dbConn;
+	}
+
+	/**
+	 * FIXME: This function should not be required!
+	 */
+	private function fixDI() {
+		if ($this->dbConn === null) {
+			$this->dbConn = \OC::$server->getDatabaseConnection();
+		}
+	}
+
+	/**
+	 * Try to create a new group
+	 * @param string $gid The name of the group to create
+	 * @return bool
+	 *
+	 * Tries to create a new group. If the group name already exists, false will
+	 * be returned.
+	 */
+	public function createGroup( $gid ) {
+		$this->fixDI();
+
+		// Add group
+		$result = $this->dbConn->insertIfNotExist('*PREFIX*groups', [
+			'gid' => $gid,
+		]);
+
+		// Add to cache
+		$this->groupCache[$gid] = $gid;
+
+		return $result === 1;
+	}
+
+	/**
+	 * delete a group
+	 * @param string $gid gid of the group to delete
+	 * @return bool
+	 *
+	 * Deletes a group and removes it from the group_user-table
+	 */
+	public function deleteGroup( $gid ) {
+		$this->fixDI();
+
+		// Delete the group
+		$qb = $this->dbConn->getQueryBuilder();
+		$qb->delete('groups')
+			->where($qb->expr()->eq('gid', $qb->createNamedParameter($gid)))
+			->execute();
+
+		// Delete the group-user relation
+		$qb = $this->dbConn->getQueryBuilder();
+		$qb->delete('group_user')
+			->where($qb->expr()->eq('gid', $qb->createNamedParameter($gid)))
+			->execute();
+
+		// Delete the group-groupadmin relation
+		$qb = $this->dbConn->getQueryBuilder();
+		$qb->delete('group_admin')
+			->where($qb->expr()->eq('gid', $qb->createNamedParameter($gid)))
+			->execute();
+
+		// Delete from cache
+		unset($this->groupCache[$gid]);
+
+		return true;
+	}
+
+	/**
+	 * is user in group?
+	 * @param string $uid uid of the user
+	 * @param string $gid gid of the group
+	 * @return bool
+	 *
+	 * Checks whether the user is member of a group or not.
+	 */
+	public function inGroup( $uid, $gid ) {
+		$this->fixDI();
+
+		// check
+		$qb = $this->dbConn->getQueryBuilder();
+		$cursor = $qb->select('uid')
+			->from('group_user')
+			->where($qb->expr()->eq('gid', $qb->createNamedParameter($gid)))
+			->andWhere($qb->expr()->eq('uid', $qb->createNamedParameter($uid)))
+			->execute();
+
+		$result = $cursor->fetch();
+		$cursor->closeCursor();
+
+		return $result ? true : false;
+	}
+
+	/**
+	 * Add a user to a group
+	 * @param string $uid Name of the user to add to group
+	 * @param string $gid Name of the group in which add the user
+	 * @return bool
+	 *
+	 * Adds a user to a group.
+	 */
+	public function addToGroup( $uid, $gid ) {
+		$this->fixDI();
+
+		// No duplicate entries!
+		if( !$this->inGroup( $uid, $gid )) {
+			$qb = $this->dbConn->getQueryBuilder();
+			$qb->insert('group_user')
+				->setValue('uid', $qb->createNamedParameter($uid))
+				->setValue('gid', $qb->createNamedParameter($gid))
+				->execute();
+			return true;
+		}else{
+			return false;
+		}
+	}
+
+	/**
+	 * Removes a user from a group
+	 * @param string $uid Name of the user to remove from group
+	 * @param string $gid Name of the group from which remove the user
+	 * @return bool
+	 *
+	 * removes the user from a group.
+	 */
+	public function removeFromGroup( $uid, $gid ) {
+		$this->fixDI();
+
+		$qb = $this->dbConn->getQueryBuilder();
+		$qb->delete('group_user')
+			->where($qb->expr()->eq('uid', $qb->createNamedParameter($uid)))
+			->andWhere($qb->expr()->eq('gid', $qb->createNamedParameter($gid)))
+			->execute();
+
+		return true;
+	}
+
+	/**
+	 * Get all groups a user belongs to
+	 * @param string $uid Name of the user
+	 * @return array an array of group names
+	 *
+	 * This function fetches all groups a user belongs to. It does not check
+	 * if the user exists at all.
+	 */
+	public function getUserGroups( $uid ) {
+		$this->fixDI();
+
+		// No magic!
+		$qb = $this->dbConn->getQueryBuilder();
+		$cursor = $qb->select('gid')
+			->from('group_user')
+			->where($qb->expr()->eq('uid', $qb->createNamedParameter($uid)))
+			->execute();
+
+		$groups = [];
+		while( $row = $cursor->fetch()) {
+			$groups[] = $row["gid"];
+			$this->groupCache[$row['gid']] = $row['gid'];
+		}
+		$cursor->closeCursor();
+
+		return $groups;
+	}
+
+	/**
+	 * get a list of all groups
+	 * @param string $search
+	 * @param int $limit
+	 * @param int $offset
+	 * @return array an array of group names
+	 *
+	 * Returns a list with all groups
+	 */
+	public function getGroups($search = '', $limit = null, $offset = null) {
+		$parameters = [];
+		$searchLike = '';
+		if ($search !== '') {
+			$parameters[] = '%' . $search . '%';
+			$searchLike = ' WHERE LOWER(`gid`) LIKE LOWER(?)';
+		}
+
+		$stmt = OC_DB::prepare('SELECT `gid` FROM `*PREFIX*groups`' . $searchLike . ' ORDER BY `gid` ASC', $limit, $offset);
+		$result = $stmt->execute($parameters);
+		$groups = array();
+		while ($row = $result->fetchRow()) {
+			$groups[] = $row['gid'];
+		}
+		return $groups;
+	}
+
+	/**
+	 * check if a group exists
+	 * @param string $gid
+	 * @return bool
+	 */
+	public function groupExists($gid) {
+		$this->fixDI();
+
+		// Check cache first
+		if (isset($this->groupCache[$gid])) {
+			return true;
+		}
+
+		$qb = $this->dbConn->getQueryBuilder();
+		$cursor = $qb->select('gid')
+			->from('groups')
+			->where($qb->expr()->eq('gid', $qb->createNamedParameter($gid)))
+			->execute();
+		$result = $cursor->fetch();
+		$cursor->closeCursor();
+
+		if ($result !== false) {
+			$this->groupCache[$gid] = $gid;
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * get a list of all users in a group
+	 * @param string $gid
+	 * @param string $search
+	 * @param int $limit
+	 * @param int $offset
+	 * @return array an array of user ids
+	 */
+	public function usersInGroup($gid, $search = '', $limit = null, $offset = null) {
+		$parameters = [$gid];
+		$searchLike = '';
+		if ($search !== '') {
+			$parameters[] = '%' . $search . '%';
+			$searchLike = ' AND `uid` LIKE ?';
+		}
+
+		$stmt = OC_DB::prepare('SELECT `uid` FROM `*PREFIX*group_user` WHERE `gid` = ?' . $searchLike . ' ORDER BY `uid` ASC',
+			$limit,
+			$offset);
+		$result = $stmt->execute($parameters);
+		$users = array();
+		while ($row = $result->fetchRow()) {
+			$users[] = $row['uid'];
+		}
+		return $users;
+	}
+
+	/**
+	 * get the number of all users matching the search string in a group
+	 * @param string $gid
+	 * @param string $search
+	 * @return int|false
+	 * @throws \OC\DatabaseException
+	 */
+	public function countUsersInGroup($gid, $search = '') {
+		$parameters = [$gid];
+		$searchLike = '';
+		if ($search !== '') {
+			$parameters[] = '%' . $search . '%';
+			$searchLike = ' AND `uid` LIKE ?';
+		}
+
+		$stmt = OC_DB::prepare('SELECT COUNT(`uid`) AS `count` FROM `*PREFIX*group_user` WHERE `gid` = ?' . $searchLike);
+		$result = $stmt->execute($parameters);
+		$count = $result->fetchOne();
+		if($count !== false) {
+			$count = intval($count);
+		}
+		return $count;
+	}
+
+}