From c0c04bbdbaa90ff067c20ddeb9362ade6c52d335 Mon Sep 17 00:00:00 2001
From: Yuu Ottosoka <minato.namikaze.best.hokage@gmail.com>
Date: Fri, 11 Jul 2025 14:03:03 +0300
Subject: [PATCH] feat(bot): add error handling middleware for telegram bot

Add onError middleware to handle and log errors gracefully, providing user feedback when errors occur
---
 apps/bot/src/index.ts                |  2 ++
 apps/bot/src/middlewares/on-error.ts | 15 +++++++++++++++
 2 files changed, 17 insertions(+)
 create mode 100644 apps/bot/src/middlewares/on-error.ts

diff --git a/apps/bot/src/index.ts b/apps/bot/src/index.ts
index 6b1fbac..1a321bb 100644
--- a/apps/bot/src/index.ts
+++ b/apps/bot/src/index.ts
@@ -6,10 +6,12 @@ import { logger } from '@repo/logger';
 import { PrismaStorageAdapter } from './session-storage';
 import { BotContext } from './types';
 import { upsertUser } from './middlewares/upsert-user';
+import { onError } from './middlewares/on-error';
 
 const bot = new Bot<BotContext>(config.BOT_TOKEN);
 const storage = new PrismaStorageAdapter();
 
+bot.use(onError);
 bot.use(session({ storage, initial: () => ({}) }));
 bot.use(upsertUser);
 
diff --git a/apps/bot/src/middlewares/on-error.ts b/apps/bot/src/middlewares/on-error.ts
new file mode 100644
index 0000000..6ba9a64
--- /dev/null
+++ b/apps/bot/src/middlewares/on-error.ts
@@ -0,0 +1,15 @@
+import { MiddlewareFn } from 'grammy';
+import { BotContext } from '../types';
+import { logger } from '@repo/logger';
+
+const errorReply =
+  'Извините, произошла ошибка при обработке вашего запроса. Пожалуйста, попробуйте позже.';
+const replyErrorLog = 'Не удалось отправить сообщение об ошибке пользователю';
+
+export const onError: MiddlewareFn<BotContext> = async (ctx, next) => {
+  return await next().catch(async () => {
+    await ctx.reply(errorReply).catch((err) => {
+      logger.error(replyErrorLog, err);
+    });
+  });
+};