adding forgotten files for last commit

frontend/modules/api/controllers/AnswerController.php

@@ -0,0 +1,58 @@
+<?php
+
+namespace frontend\modules\api\controllers;
+
+use common\models\Answer;
+use Yii;
+use yii\filters\auth\HttpBearerAuth;
+use yii\web\NotFoundHttpException;
+use yii\rest\Controller;
+
+class AnswerController extends Controller
+{
+    public function behaviors(): array
+    {
+        $behaviors = parent::behaviors();
+
+        $behaviors['authenticator']['authMethods'] = [
+            HttpBearerAuth::className(),
+        ];
+
+        return $behaviors;
+    }
+
+    public function verbs(): array
+    {
+        return [
+            'get-answers' => ['get'],
+        ];
+    }
+
+    /**
+     * @throws NotFoundHttpException
+     */
+    public function actionGetAnswers(): array
+    {
+        $question_id = Yii::$app->request->get('question_id');
+
+        if(empty($question_id) or !is_numeric($question_id))
+        {
+            throw new NotFoundHttpException('Incorrect questionnaire ID');
+        }
+
+        $answers = Answer::getActiveAnswers($question_id);
+        if(empty($answers)) {
+            throw new NotFoundHttpException('Active questionnaire not found');
+        }
+
+        array_walk( $answers, function(&$arr){
+            unset(
+                $arr['created_at'],
+                $arr['updated_at'],
+                $arr['answer_flag']
+            );
+        });
+
+        return  $answers;
+    }
+}