return all reosurces related to a bad question, but if you answer successfully filter those out

app/Http/Controllers/Api/ResourceController.php

@@ -6,22 +6,32 @@ use App\Resource;
 
 class ResourceController extends Controller
 {
+    protected function getBaseSubquery()
+    {
+        $player = get_player(false);
+
+        return \DB::table('player_history')
+            ->select('resource_category_id')
+            ->join('answers', 'answers.id', 'player_history.answer_id')
+            ->join('answer_resource_category', 'answers.id', 'answer_resource_category.answer_id')
+            ->whereRaw('player_id = ' . $player->id)
+            ->groupBy('resource_category_id');
+    }
+
     protected function buildRecommendedQuery($player)
     {
         if (!$player) {
             return 0;
         }
 
-        $subquery = \DB::table('player_history')
-            ->select('resource_resource_category.resource_id')
-            ->leftJoin('answer_resource_category', 'answer_resource_category.answer_id', 'player_history.answer_id')
-            ->leftJoin('resource_categories', 'answer_resource_category.resource_category_id', 'resource_categories.id')
-            ->leftJoin('resource_resource_category', 'resource_categories.id', 'resource_resource_category.resource_category_id')
-            ->groupBy('resource_resource_category.resource_id');
+        $bad_answers = $this->getBaseSubquery()->whereRaw('answers.weight < 0.5');
+        $good_answers = $this->getBaseSubquery()->whereRaw('answers.weight >= 0.5');
 
         $recommended = \DB::table('resources')
-            ->whereRaw('resources.id IN (' . $subquery->toSql() . ')')
-            ->where('resources.language_id', $player->language_id);
+            ->join('resource_resource_category', 'resources.id', 'resource_resource_category.resource_id')
+            ->whereRaw('resource_resource_category.resource_category_id IN (' . $bad_answers->toSql() . ')')
+            ->whereRaw('resource_resource_category.resource_category_id NOT IN (' . $good_answers->toSql() . ')')
+            ->whereRaw('resources.language_id = ' . $player->language_id);
 
         return $recommended;
     }