Don't show dashboard box if all rooms are empty.

file/lib/data/room/Room.class.php

@@ -90,25 +90,6 @@ public function canWrite(\wcf\data\user\User $user = null) {
 		return $canWrite || $ph->getPermission($this, 'mod.canAlwaysWrite');
 	}
 	
-	/**
-	 * Returns the number of users currently active in this room.
-	 * 
-	 * @return	integer
-	 */
-	public function countUsers() {
-		$sql = "SELECT
-				COUNT(*)
-			FROM
-				wcf".WCF_N."_user_storage 
-			WHERE
-					field = ?
-				AND 	fieldValue = ?";
-		$stmt = WCF::getDB()->prepareStatement($sql);
-		$stmt->execute(array('roomID', $this->roomID));
-		
-		return $stmt->fetchColumn();
-	}
-	
 	/**
 	 * Loads the room cache.
 	 */
@@ -134,6 +115,25 @@ public function getTitle() {
 		return \wcf\system\WCF::getLanguage()->get($this->title);
 	}
 	
+	/**
+	 * Returns the number of users currently active in this room.
+	 *
+	 * @return	integer
+	 */
+	public function countUsers() {
+		$sql = "SELECT
+				COUNT(*)
+			FROM
+				wcf".WCF_N."_user_storage
+			WHERE
+					field = ?
+				AND 	fieldValue = ?";
+		$stmt = WCF::getDB()->prepareStatement($sql);
+		$stmt->execute(array('roomID', $this->roomID));
+	
+		return $stmt->fetchColumn();
+	}
+	
 	/**
 	 * Returns the users that are currently active in this room.
 	 * 
@@ -155,6 +155,7 @@ public function getUsers() {
 		$userList = new \wcf\data\user\UserProfileList();
 		if (!empty($userIDs)) $userList->getConditionBuilder()->add('user_table.userID IN (?)', array($userIDs));
 		else $userList->getConditionBuilder()->add('1 = 0', array());
+		
 		$userList->readObjects();
 		
 		return $userList;

file/lib/system/dashboard/box/OnlineListDashboardBox.class.php

@@ -37,12 +37,10 @@ public function init(\wcf\data\dashboard\box\DashboardBox $box, \wcf\page\IPage
 	 * @see	wcf\system\dashboard\box\AbstractContentDashboardBox::render()
 	 */
 	protected function render() {
-		if (count($this->rooms)) {
 		\wcf\system\WCF::getTPL()->assign(array(
 			'rooms' => $this->rooms
 		));
 		
 		return \wcf\system\WCF::getTPL()->fetch('dashboardBoxOnlineList', 'chat');
 	}
-	}
 }

template/dashboardBoxOnlineList.tpl

@@ -1,11 +1,13 @@
-<header class="boxHeadline boxSubHeadline">
+{hascontent}
+	<header class="boxHeadline boxSubHeadline">
 		<hgroup>
 			<h1>{lang}chat.header.menu.chat{/lang}</h1>
 		</hgroup>
-</header>
+	</header>
 	
-<div class="container marginTop">
+	<div class="container marginTop">
 		<ul class="containerList">
+			{content}
 				{foreach from=$rooms item='room'}
 					{assign var='users' value=$room->getUsers()}
 					
@@ -17,13 +19,18 @@
 										<h1><a href="{link controller='Chat' object=$room}{/link}">{$room}</a><small> - {$room->topic|language}</small></h1>
 										<h2><strong>{#$users|count} Users</strong></h2>
 									</hgroup>
+									
 									<ul class="dataList">
-								{foreach from=$room->getUsers() item='user'}<li><a href="{link controller='User' object=$user}{/link}" class="userLink" data-user-id="{$user->userID}">{$user}</a></li>{/foreach}
+										{foreach from=$room->getUsers() item='user'}
+											<li><a href="{link controller='User' object=$user}{/link}" class="userLink" data-user-id="{$user->userID}">{$user}</a></li>
+										{/foreach}
 									</ul>
 								</div>
 							</div>
 						</li>
 					{/if}
 				{/foreach}
+			{/content}
 		</ul>
-</div>
+	</div>
+{/hascontent}