How to create a FirebaseAuth User from a query from his UID? - flutter

Question

I am a bit puzzled about how the Users are managed.
My app successfully creates user accounts via FirebaseAuth whom are creating classified ads.
I need to fetch the owner of the ad from the User UID and so far my code is as follows:
Future<Map<String, dynamic>?> getUser(String uid) async {
final d = await FirebaseFirestore.instance
.collection("User")
.where("id", isEqualTo: uid)
.get();
if (d.docs.isEmpty) return null;
return d.docs.first.data();
}
This code is expected to fetch the given user as a map.
And now, I'd like to convert the Map<String,dynamic> as an actual User instance. But how I should do that?
And is it the right way to go? Because I am wondering whether the User should only be dedicated to the 'authenticated self'.

Answer 1

If I'm right, do you mean the User of the firebase_auth package? You cannot convert Map<String, dynamic> to User. My opinion is to convert it to a model. Take a look at the example below:
class UserModel {
UserModel(
this.id,
this.name,
this.email,
…
);
final String id;
final String name;
final String email;
…
factory UserModel.fromMap(Map<String, dynamic> data, String documentId) {
final String? name = data["name"];
final String? email = data["email"];
…
return UserModel(
documentId,
name ?? "",
email ?? "",
…
);
}
Map<String, dynamic> toMap() => {
"name": name,
"email": email,
…
};
}
UserModel.fromMap(d.docs.first.data(), d.docs.first.id),
UserModel(
"Name",
"Email",
…
).toMap(),