index.js

/**
 * Copyright 2023 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the 'License');
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an 'AS IS' BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
"use strict";

// [START all]
// [START import]
// The Cloud Functions for Firebase SDK to create Cloud Functions and triggers.
const {logger} = require("firebase-functions");
const {onRequest} = require("firebase-functions/https");
const {onDocumentCreated} = require("firebase-functions/firestore");

// The Firebase Admin SDK to access Firestore.
const {initializeApp} = require("firebase-admin/app");
const {getFirestore} = require("firebase-admin/firestore");

initializeApp();
// [END import]

// [START addmessage]
// Take the text parameter passed to this HTTP endpoint and insert it into
// Firestore under the path /messages/:documentId/original
// [START addmessageTrigger]
exports.addmessage = onRequest(async (req, res) => {
  // [END addmessageTrigger]
  // Grab the text parameter.
  const original = req.query.text;
  // [START adminSdkAdd]
  // Push the new message into Firestore using the Firebase Admin SDK.
  const writeResult = await getFirestore()
      .collection("messages")
      .add({original: original});
  // Send back a message that we've successfully written the message
  res.json({result: `Message with ID: ${writeResult.id} added.`});
  // [END adminSdkAdd]
});
// [END addmessage]

// [START makeuppercase]
// Listens for new messages added to /messages/:documentId/original
// and saves an uppercased version of the message
// to /messages/:documentId/uppercase
// [START makeuppercaseTrigger]
exports.makeuppercase = onDocumentCreated("/messages/{documentId}", (event) => {
  // [END makeuppercaseTrigger]
  // [START makeUppercaseBody]
  // Grab the current value of what was written to Firestore.
  const original = event.data.data().original;

  // Access the parameter `{documentId}` with `event.params`
  logger.log("Uppercasing", event.params.documentId, original);

  const uppercase = original.toUpperCase();

  // You must return a Promise when performing
  // asynchronous tasks inside a function
  // such as writing to Firestore.
  // Setting an 'uppercase' field in Firestore document returns a Promise.
  return event.data.ref.set({uppercase}, {merge: true});
  // [END makeUppercaseBody]
});
// [END makeuppercase]
// [END all]