407 lines
17 KiB
Python
407 lines
17 KiB
Python
from io import BytesIO
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from typing import List
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from uuid import uuid4
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from fastapi import HTTPException
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from number_to_string import get_string_by_number
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from sqlalchemy import select
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from sqlalchemy.orm import selectinload, joinedload
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from starlette import status
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from weasyprint import HTML, CSS
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import backend.config
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import constants
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from constants import MONTHS, ENV
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from external.billing import BillingClient, CreateBillingRequestValue, CreateBillRequestSchema, CreateBillRequestItems, \
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BillStatusUpdateRequest, NotificationChannel, NotifyReceivedBillRequestSchema, DeleteBillRequestSchema, \
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ProductBillingDocumentPdf, ServiceBillingDocumentPdf
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from models import CardBillRequest, Card, CardProduct, CardService as CardServiceModel, CardGroup, \
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GroupBillRequest
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from schemas.billing import *
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from services.base import BaseService
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from services.card import CardsService
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from utils.list_utils import to_locale_number
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class BillingService(BaseService):
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async def _process_card_update_details(
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self,
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request: BillStatusUpdateRequest,
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):
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bill_request = await self._get_card_bill_by_id(request.listener_transaction_id)
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if not bill_request:
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return
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bill_request.pdf_url = request.info.pdf_url
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bill_request.invoice_number = request.info.invoice_number
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async def _process_group_update_details(
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self,
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request: BillStatusUpdateRequest,
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):
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prefix = "group-"
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if not request.listener_transaction_id.startswith(prefix):
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return
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request_id = int(request.listener_transaction_id.removeprefix(prefix))
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group_bill_request = await self._get_group_bill_by_id(request_id)
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if not group_bill_request:
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return
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group_bill_request.pdf_url = request.info.pdf_url
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group_bill_request.invoice_number = request.info.invoice_number
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async def _process_update_details(
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self,
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request: BillStatusUpdateRequest
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):
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billing_client = BillingClient(backend.config.BILLING_API_KEY)
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notify_received_request = NotifyReceivedBillRequestSchema(
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listener_transaction_id=request.listener_transaction_id,
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channel=NotificationChannel.PAYMENT_DETAILS,
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received=True
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)
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response = await billing_client.notify_received(notify_received_request)
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if not response.ok:
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return
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if type(request.listener_transaction_id) is int:
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await self._process_card_update_details(request)
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else:
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await self._process_group_update_details(request)
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await self.session.commit()
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async def _process_card_update_verification(
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self,
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request: BillStatusUpdateRequest
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):
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card_bill_request = await self._get_card_bill_by_id(request.listener_transaction_id)
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if not card_bill_request:
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return
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card_bill_request.paid = request.info.payed
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async def _process_group_update_verification(
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self,
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request: BillStatusUpdateRequest
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):
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prefix = "group-"
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if not request.listener_transaction_id.startswith(prefix):
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return
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group_id = int(request.listener_transaction_id.removeprefix(prefix))
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group_bill_request = await self._get_group_bill_by_id(group_id)
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if not group_bill_request:
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return
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group_bill_request.paid = request.info.payed
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async def _process_update_verification(
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self,
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request: BillStatusUpdateRequest
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):
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billing_client = BillingClient(backend.config.BILLING_API_KEY)
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notify_received_request = NotifyReceivedBillRequestSchema(
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listener_transaction_id=request.listener_transaction_id,
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channel=NotificationChannel.PAYMENT_VERIFICATION,
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received=True
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)
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response = await billing_client.notify_received(notify_received_request)
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if not response.ok:
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return
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if type(request.listener_transaction_id) is int:
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await self._process_card_update_verification(request)
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else:
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await self._process_group_update_verification(request)
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await self.session.commit()
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async def process_update(
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self,
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request: BillStatusUpdateRequest
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):
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if request.channel == NotificationChannel.PAYMENT_DETAILS:
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await self._process_update_details(request)
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elif request.channel == NotificationChannel.PAYMENT_VERIFICATION:
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await self._process_update_verification(request)
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async def create_card_bill_request(self, card: Card) -> CardBillRequest:
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card_bill_request = CardBillRequest(
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card_id=card.id,
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created_at=datetime.datetime.now()
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)
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self.session.add(card_bill_request)
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await self.session.flush()
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return card_bill_request
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async def create_group_bill_request(self, group: CardGroup) -> GroupBillRequest:
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group_bill_request = GroupBillRequest(
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group_id=group.id,
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created_at=datetime.datetime.now()
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)
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self.session.add(group_bill_request)
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await self.session.flush()
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return group_bill_request
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@staticmethod
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def _get_billing_values_from_services(services) -> List[
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CreateBillingRequestValue
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]:
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billing_request_values: List[CreateBillingRequestValue] = []
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for service in services:
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# Omit services that have no price
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if not service.price:
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continue
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billing_request_values.append(
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CreateBillingRequestValue(
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name=service.name,
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price=service.price,
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amount=service.quantity
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)
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)
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return billing_request_values
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async def create_card_billing(self, user, request: CreateCardBillRequest) -> CreateCardBillResponse:
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try:
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card_service = CardsService(self.session)
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billing_client = BillingClient(backend.config.BILLING_API_KEY)
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basic_card: Card = await card_service.get_by_id(user, request.card_id, return_raw=True)
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if basic_card.group:
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cards = await self._get_cards_by_group_id(basic_card.group.id)
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else:
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cards = [basic_card]
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(services, products, is_size_needed) = await self._get_products_for_card(cards)
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services: dict[str, ServiceBillingDocumentPdf]
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products: dict[str, ProductBillingDocumentPdf]
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is_size_needed: bool
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billing_request_values: List[CreateBillingRequestValue] = self._get_billing_values_from_services(
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services.values()
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)
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card = basic_card
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transaction_prefix = "group-" if card.group else ""
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inn: str = card.client.details.inn.strip()
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one_request_size = 100
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for i in range(0, len(billing_request_values), one_request_size):
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values = billing_request_values[i:i + one_request_size]
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if basic_card.group:
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bill_request = await self.create_group_bill_request(basic_card.group)
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else:
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bill_request = await self.create_card_bill_request(basic_card)
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listener_transaction_id = transaction_prefix + str(bill_request.id)
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create_bill_request = CreateBillRequestSchema(
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listener_transaction_id=listener_transaction_id,
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payer_name=card.client.name,
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payer_inn=inn,
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payer_phone=card.client.details.phone_number,
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items=CreateBillRequestItems(
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values=values,
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)
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)
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create_bill_response = await billing_client.create(create_bill_request)
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if not create_bill_response.ok and 'Request already exists' in create_bill_response.message:
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await self._cancel_one_bill(bill_request, listener_transaction_id)
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create_bill_response = await billing_client.create(create_bill_request)
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if not create_bill_response.ok:
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raise Exception(create_bill_response.message or 'Неизвестная ошибка')
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if card.group:
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for card in card.group.cards:
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card.is_locked = True
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else:
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card.is_locked = True
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await self.session.commit()
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return CreateCardBillResponse(ok=True, message='Заявка успешно создана!')
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except Exception as e:
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await self.session.rollback()
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return CreateCardBillResponse(ok=False, message=str(e))
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async def _get_card_bill_by_id(self, request_id: int) -> Optional[CardBillRequest]:
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return await self.session.scalar(
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select(CardBillRequest)
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.where(CardBillRequest.id == request_id)
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)
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async def _get_card_bill_by_card_id(self, card_id: int) -> List[CardBillRequest]:
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result = await self.session.scalars(
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select(CardBillRequest)
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.where(CardBillRequest.card_id == card_id)
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)
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return [*result.all()]
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async def _get_group_bill_by_id(self, request_id: int) -> Optional[GroupBillRequest]:
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return await self.session.scalar(
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select(GroupBillRequest)
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.where(GroupBillRequest.id == request_id)
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)
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async def _get_group_bill_by_group_id(self, group_id: int) -> List[GroupBillRequest]:
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result = await self.session.scalars(
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select(GroupBillRequest)
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.where(GroupBillRequest.group_id == group_id)
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)
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return [*result.all()]
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async def get_card_bill_by_id(self, card_id: int) -> GetCardBillById:
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bill = await self._get_card_bill_by_id(card_id)
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if not bill:
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raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail='Card bill was not found')
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return GetCardBillById(card_bill=CardBillRequestSchema.model_validate(bill))
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async def _cancel_one_bill(self, bill: CardBillRequest | GroupBillRequest, listener_transaction_id: str) -> None:
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billing_client = BillingClient(backend.config.BILLING_API_KEY)
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response = await billing_client.delete(
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DeleteBillRequestSchema(listener_transaction_id=listener_transaction_id)
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)
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if not response.ok:
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raise Exception('Ошибка удаления счета со стороны Billing сервиса')
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await self.session.delete(bill)
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async def cancel_card_billing(self, request: CancelCardBillRequest) -> CancelCardBillResponse:
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try:
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card = await self._get_card_by_id(request.card_id)
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if not card:
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return CancelCardBillResponse(ok=False, message='Сделка не найдена')
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if card.group:
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bills = await self._get_group_bill_by_group_id(card.group.id)
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else:
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bills = await self._get_card_bill_by_card_id(request.card_id)
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if not bills:
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return CancelCardBillResponse(ok=False, message='Заявка не найдена')
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for bill in bills:
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if card.group:
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listener_transaction_id = f"group-{bill.id}"
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else:
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listener_transaction_id = str(bill.id)
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await self._cancel_one_bill(bill, listener_transaction_id)
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await self.session.commit()
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return CancelCardBillResponse(ok=True, message='Заявка успешно отозвана')
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except Exception as e:
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await self.session.rollback()
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return CancelCardBillResponse(ok=False, message=str(e))
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def _gen_key_for_service(self, service: ServiceBillingDocumentPdf) -> str:
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return f"{service.name}-{service.price}"
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def _gen_key_for_product(self, product: ProductBillingDocumentPdf) -> str:
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article = product.article if product.article else uuid4()
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return f"{article}-{product.size}-{product.price}"
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async def _get_products_for_card(self, cards: list[Card]) -> tuple[dict, dict, bool]:
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services: dict[str, ServiceBillingDocumentPdf] = {}
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products: dict[str, ProductBillingDocumentPdf] = {}
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is_size_needed: bool = False
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for card in cards:
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for product in card.products:
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product_price = 0
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for service in product.services:
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service_data = ServiceBillingDocumentPdf(
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name=f'[{product.product.name}] - {service.service.name}',
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price=service.price,
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quantity=product.quantity
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)
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key = self._gen_key_for_service(service_data)
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if key in services:
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services[key].quantity += product.quantity
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else:
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services[key] = service_data
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product_price += service_data.price
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is_size_needed = is_size_needed | bool(product.product.size)
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product_data = ProductBillingDocumentPdf(
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article=product.product.article,
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size=product.product.size if product.product.size else "",
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price=product_price,
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quantity=product.quantity,
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)
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product_key = self._gen_key_for_product(product_data)
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if product_key in products:
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products[product_key].quantity += product_data.quantity
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else:
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products[product_key] = product_data
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for service in card.services:
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service_data = ServiceBillingDocumentPdf(
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name=service.service.name,
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price=service.price,
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quantity=service.quantity
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)
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key = self._gen_key_for_service(service_data)
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if key in services:
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services[key].quantity += service_data.quantity
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else:
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services[key] = service_data
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return services, products, is_size_needed
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async def _get_card_by_id(self, card_id: int) -> Optional[Card]:
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card: Card | None = await self.session.scalar(
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select(Card)
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.where(Card.id == card_id)
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.options(
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selectinload(Card.products).selectinload(CardProduct.services),
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selectinload(Card.services).selectinload(CardServiceModel.service),
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joinedload(Card.shipping_warehouse),
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joinedload(Card.client),
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selectinload(Card.group).selectinload(CardGroup.cards),
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)
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)
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return card
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async def _get_cards_by_group_id(self, group_id: int) -> List[Card]:
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group: CardGroup | None = await self.session.scalar(
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select(CardGroup)
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.where(CardGroup.id == group_id)
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.options(
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selectinload(CardGroup.cards).selectinload(Card.products).selectinload(CardProduct.services),
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selectinload(CardGroup.cards).selectinload(Card.services).selectinload(CardServiceModel.service),
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selectinload(CardGroup.cards).joinedload(Card.shipping_warehouse),
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selectinload(CardGroup.cards).joinedload(Card.client),
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selectinload(CardGroup.cards).selectinload(Card.group).selectinload(CardGroup.cards),
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)
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)
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return group.cards if group else []
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async def _create_billing_document_html(self, card_id: int):
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card = await self._get_card_by_id(card_id)
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if not card:
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return ""
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if card.group:
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cards = await self._get_cards_by_group_id(card.group.id)
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else:
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cards = [card]
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(services, products, is_size_needed) = await self._get_products_for_card(cards)
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price = sum((service.price * service.quantity for service in services.values()))
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price_words = get_string_by_number(price)[0:-10]
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price = to_locale_number(price)
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template = ENV.get_template("bill-of-payment.html")
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now = datetime.datetime.now()
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curr_date = f"{now.day} {MONTHS[now.month - 1]} {now.year} г."
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return template.render({
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"products": products,
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"services": services,
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"is_size_needed": is_size_needed,
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"deal_price": price,
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"deal_price_words": price_words,
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"deal": card,
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"curr_date": curr_date
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})
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async def create_billing_document_pdf(self, card_id) -> BytesIO:
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doc = await self._create_billing_document_html(card_id)
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pdf_file = BytesIO()
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HTML(string=doc).write_pdf(pdf_file, stylesheets=[CSS(constants.APP_PATH + '/static/css/bill-of-payment.css')])
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return pdf_file
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