feat: support set country code and locale after initialization

affirm/src/main/java/com/affirm/android/Affirm.java

@@ -32,6 +32,7 @@
 import static android.app.Activity.RESULT_CANCELED;
 import static android.app.Activity.RESULT_OK;
 import static com.affirm.android.AffirmColor.AFFIRM_COLOR_TYPE_BLUE;
+import static com.affirm.android.AffirmConstants.AFFIRM_NOT_INITIALIZED_MESSAGE;
 import static com.affirm.android.AffirmConstants.CHECKOUT_ERROR;
 import static com.affirm.android.AffirmConstants.CHECKOUT_TOKEN;
 import static com.affirm.android.AffirmConstants.COUNTY_CODE_CAN;
@@ -566,7 +567,7 @@ public static void initialize(@NonNull Configuration configuration) {
     public static void setPublicKeyAndMerchantName(@NonNull String publicKey,
                                                    @Nullable String merchantName) {
         if (!isInitialized()) {
-            AffirmLog.w("Affirm has not been initialized");
+            AffirmLog.w(AFFIRM_NOT_INITIALIZED_MESSAGE);
             return;
         }
 
@@ -584,7 +585,7 @@ public static void setPublicKeyAndMerchantName(@NonNull String publicKey,
      */
     public static void setPublicKey(@NonNull String publicKey) {
         if (!isInitialized()) {
-            AffirmLog.w("Affirm has not been initialized");
+            AffirmLog.w(AFFIRM_NOT_INITIALIZED_MESSAGE);
             return;
         }
 
@@ -601,7 +602,7 @@ public static void setPublicKey(@NonNull String publicKey) {
      */
     public static void setMerchantName(@Nullable String merchantName) {
         if (!isInitialized()) {
-            AffirmLog.w("Affirm has not been initialized");
+            AffirmLog.w(AFFIRM_NOT_INITIALIZED_MESSAGE);
             return;
         }
 
@@ -611,6 +612,50 @@ public static void setMerchantName(@Nullable String merchantName) {
                         .build());
     }
 
+    /**
+     * Updates the country code used by Affirm after initialization.
+     *
+     * @param countryCode Set the country code to be used by Affirm. Must not be null or empty.
+     */
+    public static void setCountryCode(@NonNull String countryCode) {
+        if (!isInitialized()) {
+            AffirmLog.w(AFFIRM_NOT_INITIALIZED_MESSAGE);
+            return;
+        }
+
+        if (countryCode.isEmpty()) {
+            AffirmLog.w("Country code is empty. Please provide a valid country code.");
+            return;
+        }
+
+        AffirmPlugins.get().setConfiguration(
+                new Affirm.Configuration.Builder(AffirmPlugins.get().getConfiguration())
+                        .setCountryCode(countryCode)
+                        .build());
+    }
+
+    /**
+     * Updates the locale used by Affirm after initialization.
+     *
+     * @param locale Set the locale to be used by Affirm. Must not be null or empty.
+     */
+    public static void setLocale(@NonNull String locale) {
+        if (!isInitialized()) {
+            AffirmLog.w(AFFIRM_NOT_INITIALIZED_MESSAGE);
+            return;
+        }
+
+        if (locale.isEmpty()) {
+            AffirmLog.w("Locale is empty. Please provide a valid locale string.");
+            return;
+        }
+
+        AffirmPlugins.get().setConfiguration(
+                new Affirm.Configuration.Builder(AffirmPlugins.get().getConfiguration())
+                        .setLocale(locale)
+                        .build());
+    }
+
     private static boolean isInitialized() {
         return AffirmPlugins.get() != null;
     }

affirm/src/main/java/com/affirm/android/AffirmConstants.java

@@ -125,6 +125,7 @@ private AffirmConstants() {
     static final String TOTAL = "total";
 
     static final String INVALID_CHECKOUT_MESSAGE = "Checkout status is in an invalid state.";
+    static final String AFFIRM_NOT_INITIALIZED_MESSAGE = "Affirm has not been initialized";
 
     static final String PROMO_PATH = "/api/promos/v2/%s";
     static final String PROMO_IS_SDK = "is_sdk";

affirm/src/test/java/com/affirm/android/AffirmTest.java

@@ -9,6 +9,8 @@
 
 import static org.junit.Assert.assertEquals;
 
+import java.util.Locale;
+
 public class AffirmTest {
 
     @Before
@@ -39,6 +41,18 @@ public void testSetMerchantName() {
         assertEquals("aaa", AffirmPlugins.get().merchantName());
     }
 
+    @Test
+    public void testSetCountryCode() {
+        Affirm.setCountryCode(Locale.US.getISO3Country());
+        assertEquals(Locale.US.getISO3Country(), AffirmPlugins.get().countryCode());
+    }
+
+    @Test
+    public void testSetLocale() {
+        Affirm.setLocale(Locale.US.toString());
+        assertEquals(Locale.US.toString(), AffirmPlugins.get().locale());
+    }
+
     @Test
     public void onActivityResult_Success() {
         Affirm.CheckoutCallbacks callbacks = Mockito.mock(Affirm.CheckoutCallbacks.class);