throw error if text field in balabola's response is empty

src/balabola_api.ts

@@ -13,6 +13,7 @@ interface BalabolaResponse {
 }
 
 export class BalabolaError extends Error { }
+export class BalabolaEmptyText extends Error { }
 
 const BASE_URL = 'https://yandex.ru/lab/api/yalm/text3';
 
@@ -29,6 +30,7 @@ export async function balabola(query: string, intro: number): Promise<string> {
     }).then(res => res.json()) as BalabolaResponse;
 
     if (result.bad_query === 1) throw new BalabolaError('bad query');
+    if (!result.text) throw new BalabolaEmptyText('empty text');
 
     return result.text;
 }

src/handlers/error.ts

@@ -1,5 +1,5 @@
 import { APIError, MessageContext } from "vk-io";
-import { BalabolaError } from "../balabola_api";
+import { BalabolaEmptyText, BalabolaError } from "../balabola_api";
 import { Composer } from "../composer";
 import { logger } from "../logger";
 
@@ -29,6 +29,12 @@ composer.use(async (ctx, next) => {
             return;
         }
 
+        if (err instanceof BalabolaEmptyText) {
+            logger.error('empty text');
+            await ctx.reply('сорян тупанул не палучилось сгенерировать давай потом');
+            return;
+        }
+
         throw err;
     }
 });