Merge pull request #112 from FirebasePrivate/add_auth_language_chooser

Add auth language chooser to facilitate manual testing.

Author: protocol86

AuthSamples/Sample/SettingsViewController.m

@@ -210,6 +210,11 @@ - (void)loadTableView {
                                          action:^{
         [weakSelf clearAppCredential];
       }],
+      [StaticContentTableViewCell cellWithTitle:@"Auth Language"
+                                          value:[FIRAuth auth].languageCode ?: @"[none]"
+                                         action:^{
+        [weakSelf showLanguageInput];
+      }],
     ]],
   ]];
 }
@@ -333,4 +338,18 @@ - (void)clearAppCredential {
   }];
 }
 
+/** @fn showLanguageInput
+    @brief Show language code input field.
+ */
+- (void)showLanguageInput {
+  [self showTextInputPromptWithMessage:@"Enter Language Code For Auth:"
+                       completionBlock:^(BOOL userPressedOK, NSString *_Nullable languageCode) {
+    if (!userPressedOK) {
+      return;
+    }
+    [FIRAuth auth].languageCode = languageCode.length ? languageCode : nil;
+    [self loadTableView];
+  }];
+}
+
 @end

Firebase/Auth/Source/FIRAuth.m

@@ -966,6 +966,10 @@ - (void)useAppLanguage {
       [bundle localizedStringForKey:kFirebaseLocaleStringKey value:nil table:@"FirebaseLocale"];
 }
 
+- (NSString *)languageCode {
+  return _requestConfiguration.languageCode;
+}
+
 #if TARGET_OS_IOS
 - (NSData *)APNSToken {
   __block NSData *result = nil;