shangyilim

const functions = require('firebase-functions');

exports.calculateOrder = functions.firestore
  .document("orders/{orderId}")
  .onWrite(async (change, context) => {

    console.log('begin trigger');
    return change.after.ref.update({
      orderUpdated: true
    });

shangyilim

import { google } from 'googleapis';

app.post('/sendSMS', function (req, res) {
  const { phoneNumber, recaptchaToken } = req.body;
  
  const identityToolkit = google.identitytoolkit({
    auth: 'GCP_API_KEY',
    version: 'v3',
  });
  

shangyilim

import { google } from 'googleapis';

app.post('/sendSMS', function (req, res) {
  const { phoneNumber, recaptchaToken } = req.body;
  
  const identityToolkit = google.identitytoolkit({
    auth: 'GCP_API_KEY',
    version: 'v3',
  });
  

shangyilim

// set-up an invisible recaptcha. 'sendCode` is button element id
// <button id="sendCode">Send Code</button>
window.recaptchaVerifier = new firebase.auth.RecaptchaVerifier('sendCode', {
  'size': 'invisible',
  'callback': function (recapchaToken) {
    // reCAPTCHA solved, send recapchaToken and phone number to backend.
    
    // a REST call to your backend
    request.post({
      url: 'https://your-rest-api',

shangyilim

export const deletePhoto = functions.firestore
  .document("posts/{postId}")
  .onUpdate((change, context) => {
    // Get an object representing the document
    const updatedPost = change.after.data() as any;

    // ...or the previous value before this update
    const oldPost = change.before.data() as any;

shangyilim

import * as functions from "firebase-functions";
import * as admin from "firebase-admin";
const firebase = admin.initializeApp();

export const deletePhotos = functions.firestore
  .document("posts/{postId}")
  .onDelete((snap, context) => {
    const { postId } = context.params;
    const bucket = firebase.storage().bucket();

shangyilim

import { combineLatest } from 'rxjs';

var californiaOrColorado$ = combineLatest(california$, colorado$)
.pipe(
  map((cities) => {
    // Destructure the values to combine a single array.
    var [californiaCities, coloradoCities] = cities;
    return [
        //spread the arrays out to combine as one array
        ...californiaCities,

shangyilim

import { collection } from 'rxfire/firestore';
import { map } from 'rxjs/operators';

// Query for California
var californiaRef = citiesRef.where("state", "==", "CA");

// Query for Colorado
var coloradoRef = citiesRef.where("state", "==", "CO");

// Create Observables ready for subscribe().

shangyilim

<ul>
   <li *ngFor="let cities of caOrCoCities$ | async as caOrCoCities">
     ...
   </li>
</ul>

shangyilim

caOrCoCities$: Observable<City[]>;
...
const californiaRef = this.angularFirestore
    .collection("cities", ref => ref.where("state","==","CA"));
const coloradoRef = this.angularFirestore
    .collection("cities", ref => ref.where("state","==","CO"));
this.caOrCoCities$ = Observable
    .combineLatest(californiaRef.valueChanges(),
                   coloradoRef.valueChanges())
    .switchMap(cities => {