Included Subtask when filtering Tasks by Assignee

I wrote some unit test specifing the behaviour.
I think only Substask with a Status != Done and an assigned user should be taken into account. The search for "nobody" should not reveal tasks with assigned users when these tasks have a subtask without an user.

app/Model/TaskFilter.php

@@ -313,10 +313,11 @@ class TaskFilter extends Base
         $this->query->beginOr();
 
         foreach ($values as $assignee) {
-
+            $subtaskQuery = $this->buildSubtaskQuery();
             switch ($assignee) {
                 case 'me':
                     $this->query->eq(Task::TABLE.'.owner_id', $this->userSession->getId());
+                    $subtaskQuery->eq(Subtask::TABLE.'user_id',$this->userSession->getId() );
                     break;
                 case 'nobody':
                     $this->query->eq(Task::TABLE.'.owner_id', 0);
@@ -324,6 +325,12 @@ class TaskFilter extends Base
                 default:
                     $this->query->ilike(User::TABLE.'.username', '%'.$assignee.'%');
                     $this->query->ilike(User::TABLE.'.name', '%'.$assignee.'%');
+                    $subtaskQuery->ilike(User::TABLE.'.username', '%'.$assignee.'%');
+                    $subtaskQuery->ilike(User::TABLE.'.name', '%'.$assignee.'%');
+            }
+            if ($assignee != 'nobody'){
+                $subtasks = $subtaskQuery->findAll();
+                $this->addTasksWithFoundSubtask($subtasks);
             }
         }
 
@@ -760,4 +767,25 @@ class TaskFilter extends Base
 
         return $this;
     }
+    
+    private function buildSubtaskQuery(){
+        return $this->db->table(Subtask::TABLE)
+                ->columns(
+                    Subtask::TABLE.'.user_id',
+                    Subtask::TABLE.'.task_id',
+                    User::TABLE.'.name',
+                    User::TABLE.'.username')
+                ->join(User::TABLE, 'id', 'user_id', Subtask::TABLE)
+                ->beginOr()
+                ->eq(Subtask::TABLE.'.status', Subtask::STATUS_TODO)
+                ->eq(Subtask::TABLE.'.status', Subtask::STATUS_INPROGRESS)
+                ->closeOr();
+    }
+
+    private function addTasksWithFoundSubtask($subtasks) {
+        foreach ($subtasks as $subtask) {
+            $this->query->eq(Task::TABLE.'.id',$subtask['task_id']);
+        }
+    }
+
 }

tests/units/TaskFilterTest.php

@@ -8,6 +8,7 @@ use Model\TaskFilter;
 use Model\TaskCreation;
 use Model\DateParser;
 use Model\Category;
+use Model\Subtask;
 
 class TaskFilterTest extends Base
 {
@@ -418,6 +419,41 @@ class TaskFilterTest extends Base
         $this->assertEquals('Bob at work', $tasks[1]['title']);
     }
 
+    public function testSearchWithAssigneeIncludingSubtasks()
+    {
+        $p = new Project($this->container);
+        $u = new User($this->container);
+        $tc = new TaskCreation($this->container);
+        $s = new Subtask($this->container);
+        $tf = new TaskFilter($this->container);
+
+        $this->assertEquals(1, $p->create(array('name' => 'test')));
+        $this->assertEquals(2, $u->create(array('username' => 'bob', 'name' => 'Bob Ryan')));
+        $this->assertEquals(1,$tc->create(array('project_id' => 1, 'title' => 'my task title is awesome', 'owner_id' => 2)));
+        $this->assertEquals(1, $s->create(array('title' => 'subtask #1', 'task_id' => 1, 'status' => 1, 'another_subtask' => 'on',  'user_id' => 0)));        
+        $this->assertEquals(2,$tc->create(array('project_id' => 1, 'title' => 'my task title is amazing', 'owner_id' => 0)));
+        $this->assertEquals(2, $s->create(array('title' => 'subtask #1', 'task_id' => 2, 'status' => 1, 'another_subtask' => 'on',  'user_id' => 2)));
+
+        $tf->search('assignee:bob');
+        $tasks = $tf->findAll();
+        $this->assertNotEmpty($tasks);
+        $this->assertCount(2, $tasks);
+        $this->assertEquals('my task title is awesome', $tasks[0]['title']);
+        $this->assertEquals('my task title is amazing', $tasks[1]['title']);
+        
+        
+        $tf->search('assignee:nobody');
+        $tasks = $tf->findAll();
+        $this->assertNotEmpty($tasks);
+        $this->assertCount(1, $tasks);
+        $this->assertEquals('my task title is amazing', $tasks[0]['title']);
+        
+
+        
+    }
+
+    
+    
     public function testCopy()
     {
         $tf = new TaskFilter($this->container);