cothema / ionic-universal-firebase-login

import { Platform } from "@ionic/angular";

import { auth } from "firebase";

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

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

import { IAuthProvider } from "./i-auth-provider";

export abstract class AbstractAuth implements IAuthProvider {

  public abstract readonly providerKey:

    | "anonymous"

    | "email"

    | "facebook"

    | "github"

    | "google"

    | "phone"

    | "twitter";

  public readonly defaultOptions: any = {};

  protected config: UniFirebaseLoginConfig;

  protected constructor(

    protected angularFireAuth: AngularFireAuth,

    protected platform: Platform,

    configProvider: UniFirebaseLoginConfigProvider,

  ) {

    this.config = configProvider.config;

    this.applyDefaultOptions();

  }

  public abstract signInNative(

    options: any,

  ): Promise<auth.UserCredential | null>;

  public async signIn(options: any = {}): Promise<auth.UserCredential | null> {

    if (this.platform.is("cordova")) {

      return this.signInNative(options);

    } else {

      return this.signInBrowser();

    }

  }

  public async signOutNative(): Promise<void> {

    if (this.angularFireAuth.auth.currentUser === null) {

      console.warn("Unknown currentUser!");

    }

  }

  public async signOutBrowser(): Promise<void> {

    return this.angularFireAuth.auth.signOut();

  }

  public async signOut(): Promise<void> {

    if (this.platform.is("cordova")) {

      return this.signOutNative();

    } else {

      return this.signOutBrowser();

    }

  }

  public async signInBrowser(): Promise<auth.UserCredential | null> {

    const provider = this.getBrowserSignInProvider();

    const authX = this.angularFireAuth.auth;

    switch (this.defaultOptions.signInType) {

      case "popup":

        return await authX.signInWithPopup(provider);

      case "redirect":

        await authX.signInWithRedirect(provider);

        // TODO: implement redirect resolution: https://stackoverflow.com/questions/40219478/firebaseauth-googleauthprovider-signinwithredirect

        throw new Error("Not implemented!");

    }

    throw new Error("Invalid signInType!");

  }

  }

  protected abstract getBrowserSignInProvider(): any | null;

}