kavore
484327a032
- Integrated promo code service into subscription service to streamline discount consumption during payment processing. - Improved error handling and logging for promo code activation and usage increment. - Updated payment services to handle discount calculations more robustly, including fallback mechanisms for invalid discount scenarios. - Added new methods for managing promo code activations and usage in the database layer.
324 lines
12 KiB
Python
324 lines
12 KiB
Python
import logging
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from datetime import datetime, timezone
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from sqlalchemy.ext.asyncio import AsyncSession
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from typing import Optional, Tuple, Dict
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from aiogram import Bot
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from config.settings import Settings
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from db.dal import promo_code_dal, user_dal, active_discount_dal, payment_dal
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from db.models import PromoCode, User
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from .subscription_service import SubscriptionService
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from bot.middlewares.i18n import JsonI18n
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from .notification_service import NotificationService
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class PromoCodeService:
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def __init__(self, settings: Settings,
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subscription_service: SubscriptionService, bot: Bot,
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i18n: JsonI18n):
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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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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.strip().upper()
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promo_data = await promo_code_dal.get_active_bonus_promo_code_by_code_str(
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session, code_input_upper)
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if not promo_data:
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return False, _("promo_code_not_found", code=code_input_upper)
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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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if existing_activation:
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return False, _("promo_code_already_used_by_user",
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code=code_input_upper)
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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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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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promo_incremented = await promo_code_dal.increment_promo_code_usage(
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session, promo_data.promo_code_id)
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if activation_recorded and promo_incremented:
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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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)
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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}"
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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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async def apply_discount_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, int | str]:
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"""
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Apply a discount promo code (sets active discount for user).
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Returns: (success: bool, discount_percentage or error_message)
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"""
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_ = lambda k, **kw: self.i18n.gettext(user_lang, k, **kw)
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code_input_upper = code_input.strip().upper()
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# Check if user already has an active discount
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existing_discount = await active_discount_dal.get_active_discount(session, user_id)
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if existing_discount:
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# Get the promo code for the existing discount
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existing_promo = await promo_code_dal.get_promo_code_by_id(
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session, existing_discount.promo_code_id
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)
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if existing_promo:
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return False, _("discount_promo_already_active",
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code=existing_promo.code,
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discount_pct=existing_discount.discount_percentage)
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else:
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# Existing discount but promo not found - clear it and continue
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await active_discount_dal.clear_active_discount(session, user_id)
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# Get discount promo code
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promo_data = await promo_code_dal.get_active_discount_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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return False, _("promo_code_not_found_or_not_discount", code=code_input_upper)
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# Check if user already used this code
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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_input_upper)
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# Set active discount
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active_discount = await active_discount_dal.set_active_discount(
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session,
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user_id=user_id,
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promo_code_id=promo_data.promo_code_id,
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discount_percentage=promo_data.discount_percentage
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)
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if not active_discount:
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# This shouldn't happen since we checked above, but just in case
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return False, _("error_applying_promo_discount")
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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 not promo_incremented:
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await active_discount_dal.clear_active_discount(session, user_id)
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logging.info(
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"Discount promo %s reached max activations during activation for user %s.",
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promo_data.code,
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user_id,
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)
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return False, _("promo_code_not_found_or_not_discount", code=code_input_upper)
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activation_recorded = await promo_code_dal.record_promo_activation(
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session,
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promo_data.promo_code_id,
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user_id,
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payment_id=None,
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)
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if not activation_recorded:
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await active_discount_dal.clear_active_discount(session, user_id)
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await promo_code_dal.decrement_promo_code_usage(
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session, promo_data.promo_code_id
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)
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logging.error(
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"Failed to record discount activation for user %s, promo %s.",
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user_id,
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promo_data.promo_code_id,
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)
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return False, _("error_applying_promo_discount")
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logging.info(
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f"Discount promo code {code_input_upper} activated for user {user_id}: "
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f"{promo_data.discount_percentage}% off"
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)
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return True, promo_data.discount_percentage
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async def get_user_active_discount(
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self,
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session: AsyncSession,
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user_id: int
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) -> Optional[Tuple[int, str]]:
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"""
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Get user's active discount if any.
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Returns: (discount_percentage, promo_code) or None
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"""
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active_discount = await active_discount_dal.get_active_discount(session, user_id)
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if not active_discount:
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return None
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# Fetch promo code for code string
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promo = await promo_code_dal.get_promo_code_by_id(
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session, active_discount.promo_code_id
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)
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if not promo:
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# Discount exists but promo not found - clear it
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await active_discount_dal.clear_active_discount(session, user_id)
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return None
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# Check if promo code has expired
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if promo.valid_until and promo.valid_until <= datetime.now(timezone.utc):
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# Promo code expired - clear the discount
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logging.info(
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f"Promo code {promo.code} expired (valid_until: {promo.valid_until}). "
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f"Clearing active discount for user {user_id}"
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)
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await active_discount_dal.clear_active_discount(session, user_id)
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return None
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return (active_discount.discount_percentage, promo.code)
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def calculate_discounted_price(
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self,
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original_price: float,
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discount_percentage: int
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) -> Tuple[float, float]:
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"""
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Calculate discounted price and discount amount.
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Returns: (final_price, discount_amount)
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"""
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discount_amount = round(original_price * (discount_percentage / 100), 2)
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final_price = round(original_price - discount_amount, 2)
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# Ensure price doesn't go negative
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if final_price < 0:
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final_price = 0
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discount_amount = original_price
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return final_price, discount_amount
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async def consume_discount(
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self,
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session: AsyncSession,
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user_id: int,
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payment_id: int
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) -> bool:
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"""
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Consume active discount: record activation, increment usage, clear active discount.
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Call this AFTER successful payment.
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"""
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payment_record = await payment_dal.get_payment_by_db_id(session, payment_id)
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if not payment_record:
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logging.warning(
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"Payment %s not found for discount consumption (user %s).",
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payment_id,
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user_id,
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)
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return False
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if not payment_record.discount_applied:
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return False
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promo_code_id = payment_record.promo_code_id
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if not promo_code_id:
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logging.warning(
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"Payment %s for user %s has discount_applied but no promo_code_id.",
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payment_id,
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user_id,
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)
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return False
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active_discount = await active_discount_dal.get_active_discount(session, user_id)
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if active_discount and active_discount.promo_code_id != promo_code_id:
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logging.info(
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"Active discount promo %s differs from payment promo %s; leaving active discount intact.",
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active_discount.promo_code_id,
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promo_code_id,
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)
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active_discount = None
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existing_activation = await promo_code_dal.get_user_activation_for_promo(
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session, promo_code_id, user_id
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)
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if existing_activation:
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if existing_activation.payment_id is None:
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updated_payment = await promo_code_dal.set_activation_payment_id(
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session, promo_code_id, user_id, payment_id
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)
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if updated_payment:
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logging.info(
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"Linked discount promo %s activation to payment %s for user %s.",
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promo_code_id,
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payment_id,
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user_id,
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)
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else:
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activation_recorded = await promo_code_dal.record_promo_activation(
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session,
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promo_code_id,
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user_id,
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payment_id=payment_id,
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)
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if not activation_recorded:
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logging.error(
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"Failed to record discount activation for user %s, promo %s.",
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user_id,
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promo_code_id,
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)
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return False
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promo_incremented = await promo_code_dal.increment_promo_code_usage(
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session, promo_code_id
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)
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if not promo_incremented:
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logging.error(
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"Failed to increment discount usage for user %s, promo %s.",
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user_id,
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promo_code_id,
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)
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return False
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if active_discount and active_discount.promo_code_id == promo_code_id:
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await active_discount_dal.clear_active_discount(session, user_id)
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await session.flush()
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logging.info(
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"Discount consumed for user %s, promo %s, payment %s",
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user_id,
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promo_code_id,
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payment_id,
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)
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return True
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