128 lines
4.8 KiB
Python
128 lines
4.8 KiB
Python
import logging
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from datetime import datetime
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from html import escape as html_escape
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from typing import Tuple
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from aiogram import Bot
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from sqlalchemy.ext.asyncio import AsyncSession
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from bot.middlewares.i18n import JsonI18n
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from config.settings import Settings
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from db.dal import promo_code_dal, security_dal, user_dal
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from .notification_service import NotificationService
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from .subscription_service import SubscriptionService
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class PromoCodeService:
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def __init__(
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self,
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settings: Settings,
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subscription_service: SubscriptionService,
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bot: Bot,
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i18n: JsonI18n,
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):
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self.settings = settings
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self.subscription_service = subscription_service
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self.bot = bot
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self.i18n = i18n
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def _throttle_identifier(self, user_id: int) -> str:
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return f"user:{int(user_id)}"
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async def apply_promo_code(
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self,
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session: AsyncSession,
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user_id: int,
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code_input: str,
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user_lang: str,
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) -> Tuple[bool, datetime | str]:
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_ = lambda k, **kw: self.i18n.gettext(user_lang, k, **kw)
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code_input_upper = (code_input or "").strip().upper()[:100]
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code_display = html_escape(code_input_upper[:100], quote=False)
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throttle_identifier = self._throttle_identifier(user_id)
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throttle = await security_dal.check_throttle(
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session,
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scope=security_dal.PROMO_CODE_APPLY_SCOPE,
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identifier=throttle_identifier,
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)
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if throttle.locked:
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return False, _(
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"promo_code_too_many_attempts",
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seconds=throttle.retry_after or max(1, int(self.settings.BRUTE_FORCE_LOCK_SECONDS)),
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)
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promo_data = await promo_code_dal.get_active_promo_code_by_code_str(
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session, code_input_upper
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)
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if not promo_data:
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throttle_result = await security_dal.record_throttle_failure(
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session,
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scope=security_dal.PROMO_CODE_APPLY_SCOPE,
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identifier=throttle_identifier,
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max_failures=self.settings.BRUTE_FORCE_MAX_FAILURES,
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window_seconds=self.settings.BRUTE_FORCE_WINDOW_SECONDS,
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lock_seconds=self.settings.BRUTE_FORCE_LOCK_SECONDS,
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)
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if throttle_result.locked:
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return False, _(
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"promo_code_too_many_attempts",
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seconds=throttle_result.retry_after
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or max(1, int(self.settings.BRUTE_FORCE_LOCK_SECONDS)),
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)
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return False, _("promo_code_not_found", code=code_display)
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existing_activation = await promo_code_dal.get_user_activation_for_promo(
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session, promo_data.promo_code_id, user_id
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)
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if existing_activation:
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return False, _("promo_code_already_used_by_user", code=code_display)
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bonus_days = promo_data.bonus_days
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new_end_date = await self.subscription_service.extend_active_subscription_days(
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session=session,
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user_id=user_id,
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bonus_days=bonus_days,
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reason=f"promo code {code_input_upper}",
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)
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if new_end_date:
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activation_recorded = await promo_code_dal.record_promo_activation(
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session, promo_data.promo_code_id, user_id, payment_id=None
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)
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promo_incremented = await promo_code_dal.increment_promo_code_usage(
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session, promo_data.promo_code_id
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)
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if activation_recorded and promo_incremented:
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await security_dal.clear_throttle_state(
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session,
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scope=security_dal.PROMO_CODE_APPLY_SCOPE,
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identifier=throttle_identifier,
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)
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# Send notification about promo activation
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try:
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notification_service = NotificationService(self.bot, self.settings, self.i18n)
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user = await user_dal.get_user_by_id(session, user_id)
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await notification_service.notify_promo_activation(
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user_id=user_id,
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promo_code=code_input_upper,
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bonus_days=bonus_days,
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username=user.username if user else None,
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email=getattr(user, "email", None) if user else None,
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)
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except Exception as e:
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logging.error(f"Failed to send promo activation notification: {e}")
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return True, new_end_date
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else:
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logging.error(
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f"Failed to record activation or increment usage for promo {promo_data.code} by user {user_id}" # noqa: E501
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)
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return False, _("error_applying_promo_bonus")
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else:
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return False, _("error_applying_promo_bonus")
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