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""" |
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byceps.blueprints.site.shop.payment.paypal.views |
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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:Copyright: 2020-2024 Jan Korneffel, Jochen Kupperschmidt |
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:License: Revised BSD (see `LICENSE` file for details) |
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""" |
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from dataclasses import dataclass |
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from uuid import UUID |
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from flask import abort, current_app, g, jsonify, request |
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from paypalcheckoutsdk.orders import OrdersGetRequest |
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from paypalhttp import HttpError, HttpResponse |
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from pydantic import BaseModel, ValidationError |
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from byceps.paypal import paypal |
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from byceps.services.shop.order import order_command_service, order_service |
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from byceps.services.shop.order.email import order_email_service |
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from byceps.services.shop.order.models.order import Order |
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from byceps.signals import shop as shop_signals |
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from byceps.util.framework.blueprint import create_blueprint |
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from byceps.util.views import create_empty_json_response |
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blueprint = create_blueprint('shop_payment_paypal', __name__) |
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class CapturePayPalRequest(BaseModel): |
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shop_order_id: UUID |
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paypal_order_id: str |
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@dataclass(frozen=True) |
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class PayPalOrderDetails: |
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id: str |
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transaction_id: str |
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@blueprint.post('/capture') |
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def capture_transaction(): |
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"""Reconcile PayPal transaction.""" |
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if not g.user.authenticated: |
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return create_empty_json_response(403) |
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req = _parse_request() |
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order = order_service.find_order(req.shop_order_id) |
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if not order or not order.is_open: |
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return create_empty_json_response(400) |
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request = OrdersGetRequest(req.paypal_order_id) |
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try: |
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response = paypal.client.execute(request) |
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except HttpError as e: |
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current_app.logger.error( |
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'PayPal API returned status code %d for paypal_order_id = %s, shop_order_id = %s: %s', |
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e.status_code, |
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req.paypal_order_id, |
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order.id, |
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e.message, |
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) |
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return create_empty_json_response(400) |
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paypal_order_details = _parse_paypal_order_details(response) |
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if not _check_transaction_against_order(response, order): |
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current_app.logger.error( |
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'PayPal order %s failed verification against shop order %s', |
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req.paypal_order_id, |
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order.id, |
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) |
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return create_empty_json_response(400) |
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_mark_order_as_paid(order, paypal_order_details) |
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return jsonify({'status': 'OK'}) |
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def _parse_request() -> CapturePayPalRequest: |
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try: |
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return CapturePayPalRequest.model_validate(request.get_json()) |
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except ValidationError as e: |
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abort(400, e.json()) |
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def _parse_paypal_order_details(response: HttpResponse) -> PayPalOrderDetails: |
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return PayPalOrderDetails( |
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id=response.result.id, |
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transaction_id=_extract_transaction_id(response), |
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) |
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def _extract_transaction_id(response: HttpResponse) -> str: |
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purchase_unit = response.result.purchase_units[0] |
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completed_captures = filter( |
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lambda c: c.status in ('COMPLETED', 'PENDING'), |
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purchase_unit.payments.captures, |
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) |
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transaction = next(completed_captures) |
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return transaction.id |
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def _check_transaction_against_order( |
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response: HttpResponse, order: Order |
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) -> bool: |
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purchase_unit = response.result.purchase_units[0] |
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return ( |
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response.result.status == 'COMPLETED' |
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and purchase_unit.amount.currency_code == 'EUR' |
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and purchase_unit.amount.value == str(order.total_amount) |
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and purchase_unit.invoice_id == order.order_number |
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) |
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def _mark_order_as_paid( |
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order: Order, paypal_order_details: PayPalOrderDetails |
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) -> None: |
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additional_payment_data = { |
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'paypal_order_id': paypal_order_details.id, |
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'paypal_transaction_id': paypal_order_details.transaction_id, |
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} |
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paid_order, event = order_command_service.mark_order_as_paid( |
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order.id, |
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'paypal', |
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g.user, |
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additional_payment_data=additional_payment_data, |
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).unwrap() |
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order_email_service.send_email_for_paid_order_to_orderer(paid_order) |
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shop_signals.order_paid.send(None, event=event) |
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byceps /
byceps
