150 lines
4.9 KiB
Python
150 lines
4.9 KiB
Python
import logging
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from typing import Any, Awaitable, Callable, Dict, Optional
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from aiogram import BaseMiddleware
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from aiogram.types import (
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CallbackQuery,
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Message,
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Update,
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)
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from sqlalchemy.ext.asyncio import AsyncSession
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from config.settings import Settings
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from db.dal import user_dal
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from bot.middlewares.i18n import JsonI18n
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from bot.keyboards.inline.user_keyboards import get_channel_subscription_keyboard
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class ChannelSubscriptionMiddleware(BaseMiddleware):
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"""
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Blocks access to handlers for users who have not yet passed the required channel subscription check.
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The /start command is allowed through so that the handler can re-run the verification.
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"""
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def __init__(self, settings: Settings, i18n_instance: JsonI18n):
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super().__init__()
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self.settings = settings
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self.i18n_main_instance = i18n_instance
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async def __call__(
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self,
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handler: Callable[[Update, Dict[str, Any]], Awaitable[Any]],
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event: Update,
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data: Dict[str, Any],
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) -> Any:
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if not self.settings.REQUIRED_CHANNEL_SUBSCRIBE_TO_USE:
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return await handler(event, data)
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required_channel_id = self.settings.REQUIRED_CHANNEL_ID
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if not required_channel_id:
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return await handler(event, data)
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event_user = data.get("event_from_user")
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if not event_user or event_user.id in self.settings.ADMIN_IDS:
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return await handler(event, data)
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callback_query = event.callback_query
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if (
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callback_query
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and callback_query.data
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and callback_query.data == "channel_subscription:verify"
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):
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return await handler(event, data)
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# Allow /start to reach the handler so the check can be re-run.
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message_object: Optional[Message] = event.message
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if (
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message_object
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and message_object.text
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and message_object.text.startswith("/start")
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):
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return await handler(event, data)
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session: AsyncSession = data["session"]
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try:
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db_user = await user_dal.get_user_by_id(session, event_user.id)
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except Exception as db_error:
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logging.error(
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"ChannelSubscriptionMiddleware: failed to fetch user %s: %s",
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event_user.id,
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db_error,
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exc_info=True,
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)
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return await handler(event, data)
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if not db_user:
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return await handler(event, data)
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if (
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db_user.channel_subscription_verified
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and db_user.channel_subscription_verified_for == required_channel_id
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):
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return await handler(event, data)
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i18n_payload: Dict[str, Any] = data.get("i18n_data", {})
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current_lang: str = i18n_payload.get(
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"current_language", self.settings.DEFAULT_LANGUAGE
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)
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i18n_instance: Optional[JsonI18n] = i18n_payload.get(
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"i18n_instance", self.i18n_main_instance
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)
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def translate(key: str) -> str:
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if i18n_instance:
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return i18n_instance.gettext(current_lang, key)
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return key
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keyboard = (
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get_channel_subscription_keyboard(
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current_lang, i18n_instance, self.settings.REQUIRED_CHANNEL_LINK
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)
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if i18n_instance
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else None
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)
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prompt_text = translate("channel_subscription_required")
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if event.callback_query:
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await self._handle_callback(event.callback_query, prompt_text, keyboard, data)
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return
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if message_object:
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await message_object.answer(prompt_text, reply_markup=keyboard)
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else:
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bot_instance = data["bot"]
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await bot_instance.send_message(
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chat_id=event_user.id,
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text=prompt_text,
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reply_markup=keyboard,
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)
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return
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async def _handle_callback(
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self,
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callback: CallbackQuery,
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prompt_text: str,
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keyboard,
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data: Dict[str, Any],
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) -> None:
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try:
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await callback.answer(prompt_text, show_alert=True)
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except Exception as exc:
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logging.debug("Failed to answer callback for channel gate prompt: %s", exc)
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if callback.message:
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try:
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await callback.message.answer(prompt_text, reply_markup=keyboard)
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except Exception as send_error:
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logging.error(
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"ChannelSubscriptionMiddleware: failed to send prompt for callback in chat %s: %s",
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callback.message.chat.id,
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send_error,
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exc_info=True,
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)
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else:
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bot_instance = data["bot"]
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await bot_instance.send_message(
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chat_id=callback.from_user.id,
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text=prompt_text,
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reply_markup=keyboard,
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)
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