useAuthEmulator method

@override Future<void> useAuthEmulator(String host, int port)

Changes this instance to point to an Auth emulator running locally.

Set the host and port of the local emulator, such as "localhost" with port 9099

Note: Must be called immediately, prior to accessing auth methods. Do not use with production credentials as emulator traffic is not encrypted.

Implementation

@override
Future<void> useAuthEmulator(String host, int port) async {
  try {
    // Get current session storage value
    final String? emulatorOrigin =
        web.window.sessionStorage.getItem(getOriginName(delegate.app.name));

    // The generic platform interface is with host and port split to
    // centralize logic between android/ios native, but web takes the
    // origin as a single string
    final String origin = 'http://$host:$port';

    if (origin == emulatorOrigin) {
      // If the origin is the same as the current one, do nothing
      // The emulator was already started at the app start
      return;
    }

    delegate.useAuthEmulator(origin);
    // Save to session storage so that the emulator is used on refresh
    // only in debug mode
    if (kDebugMode) {
      web.window.sessionStorage
          .setItem(getOriginName(delegate.app.name), origin);
    }
  } catch (e) {
    if (e is auth_interop.AuthError) {
      final String code = e.code.toDart;
      // this catches Firebase Error from web that occurs after hot reloading & hot restarting
      if (code != 'auth/emulator-config-failed') {
        throw getFirebaseAuthException(e);
      }
    } else {
      rethrow;
    }
  }
}