시작하기: 첫 번째 함수 작성 및 배포 - 실습

실습할 내용 :

https://firebase.google.com/docs/functions/get-started

아래 에서 생성한 프로젝트에서 연장해서 진행을 하겠습니다.

http://newtoynt.tistory.com/entry/FB%ED%81%B4%EB%9D%BC%EC%9A%B0%EB%93%9C%ED%95%A8%EC%88%98%EC%A0%95%EB%A6%AC%EC%A4%91

프로젝트르 보시면 아래와 같은 구조로 되어 있습니다.

funcetions 폴더로 이동해 주세요.

functions/index.js 파일을 열어 아래 내용으로 수정 하세요.

// The Cloud Functions for Firebase SDK to create Cloud Functions and setup triggers.
const functions = require('firebase-functions');

// The Firebase Admin SDK to access the Firebase Realtime Database.
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);

// Take the text parameter passed to this HTTP endpoint and insert it into the
// Realtime Database under the path /messages/:pushId/original
exports.addMessage = functions.https.onRequest((req, res) => {
  // Grab the text parameter.
  const original = req.query.text;
  // Push the new message into the Realtime Database using the Firebase Admin SDK.
  admin.database().ref('/messages').push({original: original}).then(snapshot => {
    // Redirect with 303 SEE OTHER to the URL of the pushed object in the Firebase console.
    res.redirect(303, snapshot.ref);
  });
});

// Listens for new messages added to /messages/:pushId/original and creates an
// uppercase version of the message to /messages/:pushId/uppercase
exports.makeUppercase = functions.database.ref('/messages/{pushId}/original')
    .onWrite(event => {
      // Grab the current value of what was written to the Realtime Database.
      const original = event.data.val();
      console.log('Uppercasing', event.params.pushId, original);
      const uppercase = original.toUpperCase();
      // You must return a Promise when performing asynchronous tasks inside a Functions such as
      // writing to the Firebase Realtime Database.
      // Setting an "uppercase" sibling in the Realtime Database returns a Promise.
      return event.data.ref.parent.child('uppercase').set(uppercase);
    });