Implement shopper redirect handling in CheckoutResource (#569)

Author: gcatanese

checkout-example/src/main/java/com/adyen/checkout/api/CheckoutResource.java

@@ -3,10 +3,7 @@
 import com.adyen.Client;
 import com.adyen.checkout.ApplicationProperty;
 import com.adyen.enums.Environment;
-import com.adyen.model.checkout.Amount;
-import com.adyen.model.checkout.CreateCheckoutSessionRequest;
-import com.adyen.model.checkout.CreateCheckoutSessionResponse;
-import com.adyen.model.checkout.LineItem;
+import com.adyen.model.checkout.*;
 import com.adyen.service.checkout.PaymentsApi;
 import com.adyen.service.exception.ApiException;
 import jakarta.servlet.http.HttpServletRequest;
@@ -15,6 +12,7 @@
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
+import org.springframework.web.servlet.view.RedirectView;
 
 import java.io.IOException;
 import java.util.Arrays;
@@ -59,7 +57,8 @@ public ResponseEntity<CreateCheckoutSessionResponse> sessions(@RequestHeader Str
         // (optional) set WEB to filter out payment methods available only for this platform
         checkoutSession.setChannel(CreateCheckoutSessionRequest.ChannelEnum.WEB);
         checkoutSession.setReference(orderRef); // required
-        checkoutSession.setReturnUrl(request.getScheme() + "://" + host + "/redirect?orderRef=" + orderRef);
+        checkoutSession.setReturnUrl(request.getScheme() + "://" + host + "/api/handleShopperRedirect"); // Redirect flow
+
         checkoutSession.setAmount(amount);
         // set lineItems required for some payment methods (ie Klarna)
         checkoutSession.setLineItems(Arrays.asList(
@@ -71,4 +70,52 @@ public ResponseEntity<CreateCheckoutSessionResponse> sessions(@RequestHeader Str
         var response = paymentsApi.sessions(checkoutSession);
         return ResponseEntity.ok().body(response);
     }
+
+    /**
+     * {@code GET  /api/handleShopperRedirect} : Handle redirect during payment. This gets called during the redirect flow, you can specify this in the `returnUrl`-field when constructing the /payments request to Adyen.
+     *
+     * @return the {@link RedirectView} with status {@code 302}
+     * @throws IOException  from Adyen API.
+     * @throws ApiException from Adyen API.
+     */
+    @GetMapping("/handleShopperRedirect")
+    public RedirectView redirect(@RequestParam(required = false) String payload, @RequestParam(required = false) String redirectResult) throws IOException, ApiException {
+        // Sends a request to /payments/completionDetails when redirect occurs
+        PaymentCompletionDetails completionDetails = new PaymentCompletionDetails();
+        if (redirectResult != null && !redirectResult.isEmpty()) {
+            // For redirect, you are redirected to an Adyen domain to complete the 3DS2 challenge
+            // After completing the 3DS2 challenge, you get the redirect result from Adyen in the returnUrl
+            // We then pass the redirectResult to the /completionDetails call to Adyen.
+            completionDetails.redirectResult(redirectResult);
+        } else if (payload != null && !payload.isEmpty()) {
+            completionDetails.payload(payload);
+        }
+
+        PaymentDetailsRequest detailsRequest = new PaymentDetailsRequest();
+        detailsRequest.setDetails(completionDetails);
+
+        log.info("Sending request to /payments/details {}", detailsRequest);
+        PaymentDetailsResponse paymentDetailsResponse = paymentsApi.paymentsDetails(detailsRequest);
+        log.info("Adyen: /payments/details response: {}", paymentDetailsResponse);
+
+        // Handle redirect after getting the /payment/completionDetails paymentDetailsResponse
+        String redirectURL = "/result/";
+        switch (paymentDetailsResponse.getResultCode()) {
+            case AUTHORISED:
+                redirectURL += "success";
+                break;
+            case PENDING:
+            case RECEIVED:
+                redirectURL += "pending";
+                break;
+            case REFUSED:
+                redirectURL += "failed";
+                break;
+            default:
+                redirectURL += "error";
+                break;
+        }
+        return new RedirectView(redirectURL + "?reason=" + paymentDetailsResponse.getResultCode());
+    }
+
 }