feat: add onPaymentMethodChangeStart to inline event processor

Author: kieran-osgood-shopify

modules/@shopify/checkout-sheet-kit/android/src/main/java/com/shopify/reactnative/checkoutsheetkit/RCTCheckoutWebView.java

@@ -42,6 +42,7 @@ of this software and associated documentation files (the "Software"), to deal
 
 import com.shopify.checkoutsheetkit.Authentication;
 import com.shopify.checkoutsheetkit.CheckoutException;
+import com.shopify.checkoutsheetkit.CheckoutPaymentMethodChangeStartParams;
 import com.shopify.checkoutsheetkit.DefaultCheckoutEventProcessor;
 import com.shopify.checkoutsheetkit.CheckoutOptions;
 import com.shopify.checkoutsheetkit.CheckoutWebView;
@@ -58,7 +59,9 @@ of this software and associated documentation files (the "Software"), to deal
 
 import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.shopify.checkoutsheetkit.rpc.events.CheckoutPaymentMethodChangeStart;
 
+import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Objects;
@@ -351,6 +354,22 @@ public void onAddressChangeStart(@NonNull CheckoutAddressChangeStart event) {
       }
     }
 
+    @Override
+    public void onPaymentMethodChangeStart(@NonNull CheckoutPaymentMethodChangeStart event) {
+      try {
+        CheckoutPaymentMethodChangeStartParams params = event.getParams();
+
+        Map<String, Object> eventData = new HashMap<>();
+        eventData.put("id", event.getId());
+        eventData.put("type", "paymentMethodChangeStart");
+        eventData.put("cart", params.getCart());
+
+        sendEvent("paymentMethodChangeStart", serializeToWritableMap(eventData));
+      } catch (Exception e) {
+        Log.e(TAG, "Error processing address change start event", e);
+      }
+    }
+
     @Override
     public void onLinkClick(@NonNull Uri uri) {
       WritableMap params = Arguments.createMap();

modules/@shopify/checkout-sheet-kit/android/src/main/java/com/shopify/reactnative/checkoutsheetkit/SheetCheckoutEventProcessor.java

@@ -32,6 +32,7 @@ of this software and associated documentation files (the "Software"), to deal
 
 import com.shopify.checkoutsheetkit.CheckoutException;
 import com.shopify.checkoutsheetkit.CheckoutExpiredException;
+import com.shopify.checkoutsheetkit.CheckoutPaymentMethodChangeStartParams;
 import com.shopify.checkoutsheetkit.CheckoutSheetKitException;
 import com.shopify.checkoutsheetkit.ClientException;
 import com.shopify.checkoutsheetkit.ConfigurationException;
@@ -45,6 +46,7 @@ of this software and associated documentation files (the "Software"), to deal
 import com.shopify.checkoutsheetkit.rpc.events.CheckoutAddressChangeStart;
 import com.shopify.checkoutsheetkit.rpc.events.CheckoutAddressChangeStartEvent;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.shopify.checkoutsheetkit.rpc.events.CheckoutPaymentMethodChangeStart;
 
 import java.io.IOException;
 import java.util.HashMap;
@@ -172,8 +174,24 @@ public void onAddressChangeStart(@NonNull CheckoutAddressChangeStart event) {
     }
   }
 
-  // Private
+  @Override
+  public void onPaymentMethodChangeStart(@NonNull CheckoutPaymentMethodChangeStart event) {
+    try {
+      CheckoutPaymentMethodChangeStartParams params = event.getParams();
+
+      Map<String, Object> eventData = new HashMap<>();
+      eventData.put("id", event.getId());
+      eventData.put("type", "paymentMethodChangeStart");
+      eventData.put("cart", params.getCart());
 
+      String data = mapper.writeValueAsString(eventData);
+      sendEventWithStringData("paymentMethodChangeStart", data);
+    } catch (IOException e) {
+      Log.e(TAG, "Error processing address change start event", e);
+    }
+  }
+
+  // Private
   private Map<String, Object> populateErrorDetails(CheckoutException error) {
     Map<String, Object> errorMap = new HashMap<>(Map.of(
       "__typename", getErrorTypeName(error),