update lab service interface and implement methods

module/schools/src/Service/LabService.php

@@ -70,4 +70,24 @@ class LabService implements LabServiceInterface
 
         return array_map([$this, 'export'], $labs);
     }
+
+    public function getCourses(){
+        $courses = R::findAll('course');
+        return  $courses;
+    }
+
+    public function getCoursesByLabId($id){
+        $lab = R::load('lab', $id);
+        $courses = $lab->sharedCourse;
+        return $courses;
+    }
+
+    private function getCoursesById(array $ids){
+        $courses = [];
+        foreach($ids as $id){
+            $course = R::load('course', $id);
+            $courses[] = $course;
+        }
+        return $courses;
+    }
 }

module/schools/src/Service/LabServiceInterface.php

@@ -15,4 +15,7 @@ interface LabServiceInterface
     public function updateLab(array $data, $id);
     public function getLabById($id);
     public function getLabsBySchoolId($id);
+
+    public function getCourses();
+    public function getCoursesByLabId($id);
 }