Vladless
118 lines
4.1 KiB
Python
118 lines
4.1 KiB
Python
from datetime import datetime
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from sqlalchemy import case, delete, func, insert, select, update
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from sqlalchemy.exc import SQLAlchemyError
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from sqlalchemy.ext.asyncio import AsyncSession
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from database.models import Coupon, CouponUsage
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from logger import logger
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async def create_coupon(
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session: AsyncSession,
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code: str,
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amount: int,
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usage_limit: int,
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days: int = None,
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new_users_only: bool = False,
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) -> bool:
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try:
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exists = await session.scalar(select(Coupon.id).where(Coupon.code == code))
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if exists:
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logger.warning(f"[Coupon] ⚠️ Купон с кодом {code} уже существует.")
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return False
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await session.execute(
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insert(Coupon).values(
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code=code,
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amount=amount,
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usage_limit=usage_limit,
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usage_count=0,
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is_used=False,
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days=days,
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new_users_only=new_users_only,
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)
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)
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await session.commit()
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logger.info(f"[Coupon] ✅ Купон {code} успешно создан.")
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return True
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except SQLAlchemyError as e:
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await session.rollback()
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logger.error(f"[Coupon] ❌ Ошибка при создании купона {code}: {e}")
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return False
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async def get_coupon_by_code(session: AsyncSession, code: str) -> Coupon | None:
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stmt = select(Coupon).where(Coupon.code == code)
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result = await session.execute(stmt)
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return result.scalar_one_or_none()
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async def get_all_coupons(session: AsyncSession, page: int = 1, per_page: int = 10) -> dict:
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offset = (page - 1) * per_page
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stmt = select(Coupon).order_by(Coupon.id.desc()).offset(offset).limit(per_page)
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result = await session.execute(stmt)
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coupons = result.scalars().all()
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count_stmt = select(func.count()).select_from(Coupon)
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total = await session.scalar(count_stmt)
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pages = -(-total // per_page)
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return {
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"coupons": [c.to_dict() for c in coupons],
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"total": total,
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"pages": pages,
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"current_page": page,
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}
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async def delete_coupon(session: AsyncSession, code: str) -> bool:
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result = await session.execute(select(Coupon).where(Coupon.code == code))
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coupon = result.scalar_one_or_none()
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if not coupon:
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logger.info(f"❌ Купон {code} не найден")
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return False
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await session.execute(delete(CouponUsage).where(CouponUsage.coupon_id == coupon.id))
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await session.delete(coupon)
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await session.commit()
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logger.info(f"🗑 Купон {code} удалён вместе с его использованиями")
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return True
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async def create_coupon_usage(session: AsyncSession, coupon_id: int, user_id: int):
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try:
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stmt = insert(CouponUsage).values(coupon_id=coupon_id, user_id=user_id, used_at=datetime.utcnow())
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await session.execute(stmt)
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await session.commit()
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logger.info(f"✅ Купон {coupon_id} использован пользователем {user_id}")
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except SQLAlchemyError as e:
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logger.error(f"❌ Ошибка при сохранении использования купона: {e}")
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await session.rollback()
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async def check_coupon_usage(session: AsyncSession, coupon_id: int, user_id: int) -> bool:
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stmt = select(CouponUsage).where(CouponUsage.coupon_id == coupon_id, CouponUsage.user_id == user_id)
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result = await session.execute(stmt)
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return result.scalar_one_or_none() is not None
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async def update_coupon_usage_count(session: AsyncSession, coupon_id: int):
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try:
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await session.execute(
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update(Coupon)
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.where(Coupon.id == coupon_id)
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.values(
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usage_count=Coupon.usage_count + 1,
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is_used=case((Coupon.usage_count + 1 >= Coupon.usage_limit, True), else_=False),
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)
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)
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await session.commit()
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logger.info(f"🔁 Обновлён счётчик купона {coupon_id}")
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except SQLAlchemyError as e:
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logger.error(f"❌ Ошибка при обновлении купона {coupon_id}: {e}")
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await session.rollback()
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