/**
  * Return recent project activities by user
  *
  * @param Project $project
  * @param User $user
  * @param integer $count
  * @return array
  */
 function findProjectActivitiesByUser($project, $user, $count = 30)
 {
     $type_filter = ProjectUsers::getVisibleTypesfilterByProject($user, $project);
     if ($type_filter) {
         $objects_table = TABLE_PREFIX . 'project_objects';
         $logs_table = TABLE_PREFIX . 'activity_logs';
         $count = (int) $count;
         if ($count < 1) {
             $count = 30;
         }
         // if
         return ActivityLogs::findBySQL("SELECT {$logs_table}.* FROM {$logs_table}, {$objects_table} WHERE {$logs_table}.object_id = {$objects_table}.id AND {$type_filter} AND {$objects_table}.state >= ? AND {$objects_table}.visibility >= ? ORDER BY {$logs_table}.created_on DESC LIMIT 0, {$count}", array(STATE_DELETED, $user->getVisibility()));
     } else {
         return null;
     }
     // if
 }