cloud-functions

This is a collection of frequently used functions for Firebase Cloud Functions and/or Google Cloud Functions. The following steps are intended for use with a Firebase-project and the polymerfire elements. Please make sure you have a Polymer web app (preferably generated w/ the polymer-cli) up and running before continuing.

Steps

1. Add gcm_sender_id: "103953800509" to manifest.json
2. Create firebase-messaging-sw.js and add it as dependency in polymer.json (get SENDER_ID from Settings > Project Settings > Cloud Messagingin the Firebase console):

// Give the service worker access to Firebase Messaging.
// Note that you can only use Firebase Messaging here, other Firebase libraries
// are not available in the service worker.
importScripts('https://www.gstatic.com/firebasejs/3.5.2/firebase-app.js');
importScripts('https://www.gstatic.com/firebasejs/3.5.2/firebase-messaging.js');

// Initialize the Firebase app in the service worker by passing in the messagingSenderId
firebase.initializeApp({
  'messagingSenderId': '[ SENDER_ID ]'
});

// Retrieve an instance of Firebase Messaging so that it can handle background
// messages.
const messaging = firebase.messaging();

3. Set the messaging-sender-id property on firebase-app element (get ID from above)
4. Create functions folder:

• Create package.json and add dependencies:

{
  "name": "cloud-functions",
  "description": "Firebase SDK for Cloud Functions",
  "private": true,
  "dependencies": {
    "firebase-admin": "^5.5.0",
    "firebase-functions": "^0.7.3",
    "request": "^2.79.0",
    "request-promise": "^4.2.1",
    "secure-compare": "^3.0.1"
  }
}

• Create index.js, add imports and init app:

// Import and initialize the Firebase Admin SDK.
const admin = require('firebase-admin');
// Import the Firebase SDK for Google Cloud Functions
const functions = require('firebase-functions');

// Init
admin.initializeApp(functions.config().firebase);

// Setting api key
const MESSAGING_SERVER_KEY = functions.config().messaging.key;

• Set SERVER_KEY in environment config (get SERVER_KEY from Settings > Project Settings > Cloud Messaging):

firebase functions:config:set messaging.key="SERVER_KEY"

• Generate and set CRON_KEY in environment config:

npm install -g crypto
node -e "console.log(require('crypto').randomBytes(20).toString('hex'))"

firebase functions:config:set cron.key="CRON_KEY"

• Add export function snippets to the bottom of index.js
• Lastly add logStatus.snippet.js to enable output to logs
• Update Security Rules:

{
  "rules": {
    ".read": false,
    ".write": false,
    "topics": {
      "$topic": {
        "$uid": {
          ".read": "auth.uid === $uid",
          ".write": "auth.uid === $uid"
        }
      }
    }
  }
}

Setup

Prerequisites

Install npm (or install Node):

curl -L https://www.npmjs.com/install.sh | sh

Install bower:

npm install -g bower

Tools

Install firebase-tools:

npm install -g firebase-tools

Choose Firebase project

After installing prerequisites and tools:

firebase login

firebase use default

Deploy

This command deploys the application to hosting in the current project. Use firebase list to print a list of all Firebase projects.

firebase deploy --only functions