Added number of matches to users overview

templates/user/list.latte

@@ -9,13 +9,16 @@
             <th>#</th>
             <th>{_'Username'}</th>
             <th>{_'Role'}</th>
+            <th>{_'Matches'}</th>
         </tr>
     </thead>
     <tbody>
         <tr n:foreach="$users as $user" data-href="user/{$user->id}">
+            {var $h = new UserHelper($user)}
             <td>{$user->id}</td>
             <td>{$user->username}</td>
             <td>{_$user->role}</td>
+            <td>{$h->numberOfMatches()}</td>
         </tr>
     </tbody>
 </table>

util.php

@@ -112,10 +112,10 @@ class UserHelper {
         $this->user = $dbuser;
     }
 
-    public function numberOfMatches($discipline) {
-        return $this->user->related('match')
-            ->where('discipline', $discipline)
-            ->count();
+    public function numberOfMatches($discipline=null) {
+        $q = $this->user->related('match');
+        $discipline && $q->where('discipline', $discipline);
+        return $q->count();
     }
 
     public function averageMatchScore($discipline) {