cothema / ionic-universal-firebase-login

export abstract class AbstractStorage<User extends UserModel = UserModel>

    implements IStorageProvider<User> {

    protected config: UniFirebaseLoginConfig;

    protected constructor(

        protected angularFireAuth: AngularFireAuth,

        configProvider: UniFirebaseLoginConfigProvider,

    ) {

        this.config = configProvider.config;

    }

    public abstract async updateStoredDataByUser(user: User): Promise<void>;

    public abstract async updateStoredDataByFirebaseUser(

        firebaseUser: firebase.User,

    ): Promise<void>;

    public async fetchUser(): Promise<User | null> {

        return this.subscribeUser().toPromise();

    }

    public subscribeUser(): Observable<User | null> {

        // Get the auth state, then fetch the Firestore user document or return null

        return this.angularFireAuth.authState.pipe(

            switchMap((user: any) => {

                if (user) {

                    this.fetchUserFromStorageByFirebaseUser(user);

                }

                // Logged out

                return of(null);

            }),

        ) as Observable<User | null>;

    }

    protected abstract fetchUserFromStorageByFirebaseUser(

        user: User,

    ): Observable<User | null>;

    /**

     * Override this method if you want to use custom model class

     */

    protected getNewUser(): User {

        return this.config.userFactoryFunc() as User;