How do I access the variables from my provider class inside another class in flutter?

Question

I'm trying to call the function googleLogin from my Provider class and then insert it into my method in the List text

class Data {
  List text = [
    {
      "text": "Sign up with Google",
      "icon": const Icon(
        FontAwesomeIcons.google,
        color: Colors.red,
        size: 20,
      ),
      "method": () {
        print("the sign up button is working");
      }
    },
    {
      "text": "Sign up with Facebook",
      "icon":
          const Icon(FontAwesomeIcons.facebook, color: Colors.blue, size: 20),
      "method": () {
        print("signing up via facebook");
      }
    },
    {
      "text": "Sign up with email",
      "icon":
          const Icon(FontAwesomeIcons.envelope, color: Colors.white, size: 20),
      "method": () {
        print("signing up with email ");
      }
    },
    {
      "text": "Sign up as a Guest",
      "icon": const Icon(FontAwesomeIcons.user, color: Colors.white, size: 20),
      "method": () {
        print("signing up as guest");
      }
    }
  ];}

here's my provider code

class Auth extends ChangeNotifier
 {
  final googleSignIn = GoogleSignIn();
  GoogleSignInAccount? user;

  Future googleLogin() async {
    final googleUser = await googleSignIn.signIn();
    if (googleUser == null) return;
    user = googleUser;
    final googleAuth = await googleUser.authentication;

    final credentials = GoogleAuthProvider.credential(
        accessToken: googleAuth.accessToken, idToken: googleAuth.idToken);

    await FirebaseAuth.instance.signInWithCredential(credentials);
  }
}

Answer 1

You should then inject the BuildContext into your Data class and fetch Auth via the provider, like this:

class Data {
   Auth? auth;

   Data(BuildContext ctx) {
      auth = Provider.of<Auth>(context, listen: false);
   }

   /// then inside your List text…
   List text = [
      { 
        “method”: () async {
          await auth!.googleLogin();
        }
      }
   ];
}

Something around those lines. You could also refactor it and instead wrap you List text into a method in which you inject the Provider or even the whole service itself so you can call it from inside. My two cents.