cothema / ionic-universal-firebase-login

import { AngularFireAuth } from "@angular/fire/auth";

import * as firebase from "firebase";

import { BehaviorSubject, Observable } from "rxjs";

import { UniFirebaseLoginConfigProvider } from "../config/uni-firebase-login-config-provider";

import { UserModel } from "../model/user-model";

import { AbstractStorage } from "./abstract-storage";

import { IStorageProvider } from "./i-storage-provider";

@Injectable({

    providedIn: "root",

})

export class InMemoryStorage<User extends UserModel = UserModel>

    extends AbstractStorage<User>

    implements IStorageProvider<User> {

    private userData: BehaviorSubject<User | null> = new BehaviorSubject(

        null as User | null,

    );

    public constructor(

        angularFireAuth: AngularFireAuth,

        configProvider: UniFirebaseLoginConfigProvider,

    ) {

        super(angularFireAuth, configProvider);

    }

    public async updateStoredDataByFirebaseUser(

        storageUser: firebase.User,

    ): Promise<void> {

        if (storageUser.uid) {

            this.userData.next(

                this.config.storageUserFactoryFunc(storageUser) as User,

            );

        } else {

            throw new Error("Firebase user has no UID.");

        }

    }

    protected fetchUserFromStorageByFirebaseUser(

        user: User,

    ): Observable<User | null> {

        return new Observable(subscriber => {

            subscriber.next(this.userData.getValue());

            subscriber.complete();

        });

    }

}