/**
  * 
  * @param PurchaseHdr $model
  * @return array
  */
 protected function savePurchase($model)
 {
     $post = Yii::$app->request->post();
     $details = $model->purchaseDtls;
     $success = false;
     if ($model->load($post)) {
         $transaction = Yii::$app->db->beginTransaction();
         try {
             $formName = (new PurchaseDtl())->formName();
             $postDetails = empty($post[$formName]) ? [] : $post[$formName];
             if ($postDetails === []) {
                 throw new Exception('Detail tidak boleh kosong');
             }
             $objs = [];
             foreach ($details as $detail) {
                 $objs[$detail->id_purchase_dtl] = $detail;
             }
             if (empty($model->id_warehouse) && count($details)) {
                 $model->id_warehouse = $details[0]->id_warehouse;
             }
             if ($model->save()) {
                 $success = true;
                 $id_hdr = $model->id_purchase;
                 $id_whse = $model->id_warehouse;
                 $details = [];
                 foreach ($postDetails as $dataDetail) {
                     $id_dtl = $dataDetail['id_purchase_dtl'];
                     if (isset($objs[$id_dtl])) {
                         $detail = $objs[$id_dtl];
                         unset($objs[$id_dtl]);
                     } else {
                         $detail = new PurchaseDtl();
                     }
                     $detail->setAttributes($dataDetail);
                     $detail->id_purchase = $id_hdr;
                     $detail->id_warehouse = $id_whse;
                     if (!$detail->save()) {
                         $success = false;
                         break;
                     }
                     $details[] = $detail;
                 }
                 if ($success && count($objs) > 0) {
                     $success = PurchaseDtl::deleteAll(['id_purchase_dtl' => array_keys($objs)]);
                 }
             }
             if ($success) {
                 $transaction->commit();
             } else {
                 $transaction->rollBack();
             }
         } catch (Exception $exc) {
             $success = false;
             $model->addError('', $exc->getMessage());
             $transaction->rollBack();
         }
         if (!$success) {
             $details = [];
             foreach ($postDetails as $value) {
                 $detail = new PurchaseDtl();
                 $detail->setAttributes($value);
                 $details[] = $detail;
             }
         }
     }
     return [$details, $success];
 }