Add PaypalPaymentProvider

pp/paypal.go

@@ -0,0 +1,98 @@
+// Copyright 2023 The Casdoor Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package pp
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+
+	"github.com/plutov/paypal/v4"
+)
+
+type PaypalPaymentProvider struct {
+	Client *paypal.Client
+}
+
+func NewPaypalPaymentProvider(clientID string, secret string) (*PaypalPaymentProvider, error) {
+	pp := &PaypalPaymentProvider{}
+
+	client, err := paypal.NewClient(clientID, secret, paypal.APIBaseSandBox)
+	if err != nil {
+		return nil, err
+	}
+
+	pp.Client = client
+	return pp, nil
+}
+
+func (pp *PaypalPaymentProvider) Pay(providerName string, productName string, payerName string, paymentName string, productDisplayName string, price float64, returnUrl string, notifyUrl string) (string, error) {
+	// pp.Client.SetLog(os.Stdout) // Set log to terminal stdout
+
+	receiverEmail := "sb-tmsqa26118644@business.example.com"
+
+	amount := paypal.AmountPayout{
+		Value:    fmt.Sprintf("%.2f", price),
+		Currency: "USD",
+	}
+
+	description := fmt.Sprintf("%s-%s", providerName, productName)
+
+	payout := paypal.Payout{
+		SenderBatchHeader: &paypal.SenderBatchHeader{
+			EmailSubject: description,
+		},
+		Items: []paypal.PayoutItem{
+			{
+				RecipientType: "EMAIL",
+				Receiver:      receiverEmail,
+				Amount:        &amount,
+				Note:          description,
+				SenderItemID:  description,
+			},
+		},
+	}
+
+	_, err := pp.Client.GetAccessToken(context.Background())
+	if err != nil {
+		return "", err
+	}
+
+	payoutResponse, err := pp.Client.CreatePayout(context.Background(), payout)
+	if err != nil {
+		return "", err
+	}
+
+	payUrl := payoutResponse.Links[0].Href
+	return payUrl, nil
+}
+
+func (pp *PaypalPaymentProvider) Notify(request *http.Request, body []byte, authorityPublicKey string) (string, string, float64, string, string, error) {
+	// The PayPal SDK does not directly support IPN verification.
+	// So, you need to implement this part according to PayPal's IPN guide.
+	return "", "", 0, "", "", nil
+}
+
+func (pp *PaypalPaymentProvider) GetInvoice(paymentName string, personName string, personIdCard string, personEmail string, personPhone string, invoiceType string, invoiceTitle string, invoiceTaxId string) (string, error) {
+	return "", nil
+}
+
+func (pp *PaypalPaymentProvider) GetResponseError(err error) string {
+	if err == nil {
+		return "success"
+	} else {
+		return "fail"
+	}
+}