1 files changed, 239 insertions, 0 deletions
diff --git a/lib/private/group/database.php b/lib/private/group/database.php
new file mode 100644
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+<?php
+
+/**
+ * ownCloud
+ *
+ * @author Frank Karlitschek
+ * @copyright 2012 Frank Karlitschek frank@owncloud.org
+ *
+ * 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/>.
+ *
+ */
+/*
+ *
+ * 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 {
+
+	/**
+	 * @brief 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 ) {
+		// Check for existence
+		$stmt = OC_DB::prepare( "SELECT `gid` FROM `*PREFIX*groups` WHERE `gid` = ?" );
+		$result = $stmt->execute( array( $gid ));
+
+		if( $result->fetchRow() ) {
+			// Can not add an existing group
+			return false;
+		}
+		else{
+			// Add group and exit
+			$stmt = OC_DB::prepare( "INSERT INTO `*PREFIX*groups` ( `gid` ) VALUES( ? )" );
+			$result = $stmt->execute( array( $gid ));
+
+			return $result ? true : false;
+		}
+	}
+
+	/**
+	 * @brief 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 ) {
+		// Delete the group
+		$stmt = OC_DB::prepare( "DELETE FROM `*PREFIX*groups` WHERE `gid` = ?" );
+		$stmt->execute( array( $gid ));
+
+		// Delete the group-user relation
+		$stmt = OC_DB::prepare( "DELETE FROM `*PREFIX*group_user` WHERE `gid` = ?" );
+		$stmt->execute( array( $gid ));
+
+		return true;
+	}
+
+	/**
+	 * @brief 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 ) {
+		// check
+		$stmt = OC_DB::prepare( "SELECT `uid` FROM `*PREFIX*group_user` WHERE `gid` = ? AND `uid` = ?" );
+		$result = $stmt->execute( array( $gid, $uid ));
+
+		return $result->fetchRow() ? true : false;
+	}
+
+	/**
+	 * @brief 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, $gid ) {
+		// No duplicate entries!
+		if( !$this->inGroup( $uid, $gid )) {
+			$stmt = OC_DB::prepare( "INSERT INTO `*PREFIX*group_user` ( `uid`, `gid` ) VALUES( ?, ? )" );
+			$stmt->execute( array( $uid, $gid ));
+			return true;
+		}else{
+			return false;
+		}
+	}
+
+	/**
+	 * @brief 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 ) {
+		$stmt = OC_DB::prepare( "DELETE FROM `*PREFIX*group_user` WHERE `uid` = ? AND `gid` = ?" );
+		$stmt->execute( array( $uid, $gid ));
+
+		return true;
+	}
+
+	/**
+	 * @brief Get all groups a user belongs to
+	 * @param string $uid Name of the user
+	 * @return array with 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 ) {
+		// No magic!
+		$stmt = OC_DB::prepare( "SELECT `gid` FROM `*PREFIX*group_user` WHERE `uid` = ?" );
+		$result = $stmt->execute( array( $uid ));
+
+		$groups = array();
+		while( $row = $result->fetchRow()) {
+			$groups[] = $row["gid"];
+		}
+
+		return $groups;
+	}
+
+	/**
+	 * @brief get a list of all groups
+	 * @param string $search
+	 * @param int $limit
+	 * @param int $offset
+	 * @return array with group names
+	 *
+	 * Returns a list with all groups
+	 */
+	public function getGroups($search = '', $limit = null, $offset = null) {
+		$stmt = OC_DB::prepare('SELECT `gid` FROM `*PREFIX*groups` WHERE `gid` LIKE ?', $limit, $offset);
+		$result = $stmt->execute(array($search.'%'));
+		$groups = array();
+		while ($row = $result->fetchRow()) {
+			$groups[] = $row['gid'];
+		}
+		return $groups;
+	}
+
+	/**
+	 * check if a group exists
+	 * @param string $gid
+	 * @return bool
+	 */
+	public function groupExists($gid) {
+		$query = OC_DB::prepare('SELECT `gid` FROM `*PREFIX*groups` WHERE `gid` = ?');
+		$result = $query->execute(array($gid))->fetchOne();
+		if ($result) {
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * @brief get a list of all users in a group
+	 * @param string $gid
+	 * @param string $search
+	 * @param int $limit
+	 * @param int $offset
+	 * @return array with user ids
+	 */
+	public function usersInGroup($gid, $search = '', $limit = null, $offset = null) {
+		$stmt = OC_DB::prepare('SELECT `uid` FROM `*PREFIX*group_user` WHERE `gid` = ? AND `uid` LIKE ?',
+			$limit,
+			$offset);
+		$result = $stmt->execute(array($gid, $search.'%'));
+		$users = array();
+		while ($row = $result->fetchRow()) {
+			$users[] = $row['uid'];
+		}
+		return $users;
+	}
+
+	/**
+	 * @brief get a list of all display names in a group
+	 * @param string $gid
+	 * @param string $search
+	 * @param int $limit
+	 * @param int $offset
+	 * @return array with display names (value) and user ids (key)
+	 */
+	public function displayNamesInGroup($gid, $search = '', $limit = -1, $offset = 0) {
+		$displayNames = array();
+
+		$stmt = OC_DB::prepare('SELECT `*PREFIX*users`.`uid`, `*PREFIX*users`.`displayname`'
+			.' FROM `*PREFIX*users`'
+			.' INNER JOIN `*PREFIX*group_user` ON `*PREFIX*group_user`.`uid` = `*PREFIX*users`.`uid`'
+			.' WHERE `gid` = ? AND `*PREFIX*group_user`.`uid` LIKE ?',
+			$limit,
+			$offset);
+		$result = $stmt->execute(array($gid, $search.'%'));
+		$users = array();
+		while ($row = $result->fetchRow()) {
+			$displayName = trim($row['displayname'], ' ');
+			$displayNames[$row['uid']] = empty($displayName) ? $row['uid'] : $displayName;
+		}
+		return $displayNames;
+	}
+}