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diff --git a/lib/private/legacy/preferences.php b/lib/private/legacy/preferences.php
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+<?php
+/**
+ * ownCloud
+ *
+ * @author Frank Karlitschek
+ * @author Jakob Sack
+ * @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/>.
+ *
+ */
+
+/**
+ * This class provides an easy way for storing user preferences.
+ */
+OC_Preferences::$object = new \OC\Preferences(OC_DB::getConnection());
+class OC_Preferences{
+	public static $object;
+	/**
+	 * @brief Get all users using the preferences
+	 * @return array with user ids
+	 *
+	 * This function returns a list of all users that have at least one entry
+	 * in the preferences table.
+	 */
+	public static function getUsers() {
+		return self::$object->getUsers();
+	}
+
+	/**
+	 * @brief Get all apps of a user
+	 * @param string $user user
+	 * @return array with app ids
+	 *
+	 * This function returns a list of all apps of the user that have at least
+	 * one entry in the preferences table.
+	 */
+	public static function getApps( $user ) {
+		return self::$object->getApps( $user );
+	}
+
+	/**
+	 * @brief Get the available keys for an app
+	 * @param string $user user
+	 * @param string $app the app we are looking for
+	 * @return array with key names
+	 *
+	 * This function gets all keys of an app of an user. Please note that the
+	 * values are not returned.
+	 */
+	public static function getKeys( $user, $app ) {
+		return self::$object->getKeys( $user, $app );
+	}
+
+	/**
+	 * @brief Gets the preference
+	 * @param string $user user
+	 * @param string $app app
+	 * @param string $key key
+	 * @param string $default = null, default value if the key does not exist
+	 * @return string the value or $default
+	 *
+	 * This function gets a value from the preferences table. If the key does
+	 * not exist the default value will be returned
+	 */
+	public static function getValue( $user, $app, $key, $default = null ) {
+		return self::$object->getValue( $user, $app, $key, $default );
+	}
+
+	/**
+	 * @brief sets a value in the preferences
+	 * @param string $user user
+	 * @param string $app app
+	 * @param string $key key
+	 * @param string $value value
+	 * @return bool
+	 *
+	 * Adds a value to the preferences. If the key did not exist before, it
+	 * will be added automagically.
+	 */
+	public static function setValue( $user, $app, $key, $value ) {
+		self::$object->setValue( $user, $app, $key, $value );
+		return true;
+	}
+
+	/**
+	 * @brief Deletes a key
+	 * @param string $user user
+	 * @param string $app app
+	 * @param string $key key
+	 *
+	 * Deletes a key.
+	 */
+	public static function deleteKey( $user, $app, $key ) {
+		self::$object->deleteKey( $user, $app, $key );
+		return true;
+	}
+
+	/**
+	 * @brief Remove app of user from preferences
+	 * @param string $user user
+	 * @param string $app app
+	 * @return bool
+	 *
+	 * Removes all keys in preferences belonging to the app and the user.
+	 */
+	public static function deleteApp( $user, $app ) {
+		self::$object->deleteApp( $user, $app );
+		return true;
+	}
+
+	/**
+	 * @brief Remove user from preferences
+	 * @param string $user user
+	 * @return bool
+	 *
+	 * Removes all keys in preferences belonging to the user.
+	 */
+	public static function deleteUser( $user ) {
+		self::$object->deleteUser( $user );
+		return true;
+	}
+
+	/**
+	 * @brief Remove app from all users
+	 * @param string $app app
+	 * @return bool
+	 *
+	 * Removes all keys in preferences belonging to the app.
+	 */
+	public static function deleteAppFromAllUsers( $app ) {
+		self::$object->deleteAppFromAllUsers( $app );
+		return true;
+	}
+}