add optional countUsersInGroup method to group backends

Conflicts:
	lib/private/group/backend.php
	lib/private/group/database.php
	lib/private/group/dummy.php

4 files changed, 73 insertions, 2 deletions

diff --git a/lib/private/group/backend.php b/lib/private/group/backend.php
index 11ec6c2920d..fd9a8d61c12 100644
--- a/lib/private/group/backend.php
+++ b/lib/private/group/backend.php
@@ -33,7 +33,8 @@ define('OC_GROUP_BACKEND_CREATE_GROUP',      0x00000001);
 define('OC_GROUP_BACKEND_DELETE_GROUP',      0x00000010);
 define('OC_GROUP_BACKEND_ADD_TO_GROUP',      0x00000100);
 define('OC_GROUP_BACKEND_REMOVE_FROM_GOUP',  0x00001000);
-define('OC_GROUP_BACKEND_GET_DISPLAYNAME',   0x00010000); //OBSOLETE
+define('OC_GROUP_BACKEND_GET_DISPLAYNAME',   0x00010000);
+define('OC_GROUP_BACKEND_COUNT_USERS',       0x00100000);
 
 /**
  * Abstract base class for user management
@@ -44,6 +45,8 @@ abstract class OC_Group_Backend implements OC_Group_Interface {
 		OC_GROUP_BACKEND_DELETE_GROUP => 'deleteGroup',
 		OC_GROUP_BACKEND_ADD_TO_GROUP => 'addToGroup',
 		OC_GROUP_BACKEND_REMOVE_FROM_GOUP => 'removeFromGroup',
+		OC_GROUP_BACKEND_GET_DISPLAYNAME => 'displayNamesInGroup',
+		OC_GROUP_BACKEND_COUNT_USERS => 'countUsersInGroup',
 	);
 
 	/**
diff --git a/lib/private/group/database.php b/lib/private/group/database.php
index ff2c24ae9d7..d855ad4b349 100644
--- a/lib/private/group/database.php
+++ b/lib/private/group/database.php
@@ -211,4 +211,43 @@ class OC_Group_Database extends OC_Group_Backend {
 		return $users;
 	}
 
+	/**
+	 * @brief get the number of all users matching the search string in a group
+	 * @param string $gid
+	 * @param string $search
+	 * @param int $limit
+	 * @param int $offset
+	 * @return int | false
+	 */
+	public function countUsersInGroup($gid, $search = '') {
+		$stmt = OC_DB::prepare('SELECT COUNT(`uid`) AS `count` FROM `*PREFIX*group_user` WHERE `gid` = ? AND `uid` LIKE ?');
+		$result = $stmt->execute(array($gid, $search.'%'));
+		return $result->fetchOne();
+	}
+
+	/**
+	 * @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;
+	}
 }
diff --git a/lib/private/group/dummy.php b/lib/private/group/dummy.php
index 8dad769f9c6..a502800b16a 100644
--- a/lib/private/group/dummy.php
+++ b/lib/private/group/dummy.php
@@ -175,6 +175,14 @@ class OC_Group_Dummy extends OC_Group_Backend {
 		}
 	}
 
-
+	/**
+	 * @brief get the number of all users in a group
+	 * @returns int | bool
+	 */
+	public function countUsersInGroup($gid, $search = '', $limit = -1, $offset = 0) {
+		if(isset($this->groups[$gid])) {
+			return count($this->groups[$gid]);
+		}
+	}
 
 }
diff --git a/lib/private/group/group.php b/lib/private/group/group.php
index f10964dfff2..9689ecb08e5 100644
--- a/lib/private/group/group.php
+++ b/lib/private/group/group.php
@@ -181,6 +181,27 @@ class Group {
 	}
 
 	/**
+	 * returns the number of users matching the search string
+	 *
+	 * @param string $search
+	 * @return int | bool
+	 */
+	public function count($search) {
+		$users = false;
+		foreach ($this->backends as $backend) {
+			if(method_exists($backend, 'countUsersInGroup')) {
+				if($users === false) {
+					//we could directly add to a bool variable, but this would
+					//be ugly
+					$users = 0;
+				}
+				$users += $backend->countUsersInGroup($this->gid, $search);
+			}
+		}
+		return $users;
+	}
+
+	/**
 	 * search for users in the group by displayname
 	 *
 	 * @param string $search