├── .firebaserc
├── .gitignore
├── firebase.json
└── functions
    ├── index.js
    ├── package-lock.json
    └── package.json


/.firebaserc:
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1 | {
2 |   "projects": {
3 |     "default": "fb-cloud-functions-demo"
4 |   }
5 | }
6 | 


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/.gitignore:
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1 | node_modules
2 | fb-cloud-functions-demo-firebase-adminsdk-km39q-405896eddb.json
3 | 


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/firebase.json:
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1 | {}
2 | 


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/functions/index.js:
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  1 | const functions = require("firebase-functions");
  2 | const os = require("os");
  3 | const path = require("path");
  4 | const spawn = require("child-process-promise").spawn;
  5 | const cors = require("cors")({ origin: true });
  6 | const Busboy = require("busboy");
  7 | const fs = require("fs");
  8 | 
  9 | const gcconfig = {
 10 |   projectId: "fb-cloud-functions-demo",
 11 |   keyFilename: "fb-cloud-functions-demo-firebase-adminsdk-km39q-405896eddb.json"
 12 | };
 13 | 
 14 | const gcs = require("@google-cloud/storage")(gcconfig);
 15 | // // Create and Deploy Your First Cloud Functions
 16 | // // https://firebase.google.com/docs/functions/write-firebase-functions
 17 | //
 18 | exports.onFileChange = functions.storage.object().onChange(event => {
 19 |   const object = event.data;
 20 |   const bucket = object.bucket;
 21 |   const contentType = object.contentType;
 22 |   const filePath = object.name;
 23 |   console.log("File change detected, function execution started");
 24 | 
 25 |   if (object.resourceState === "not_exists") {
 26 |     console.log("We deleted a file, exit...");
 27 |     return;
 28 |   }
 29 | 
 30 |   if (path.basename(filePath).startsWith("resized-")) {
 31 |     console.log("We already renamed that file!");
 32 |     return;
 33 |   }
 34 | 
 35 |   const destBucket = gcs.bucket(bucket);
 36 |   const tmpFilePath = path.join(os.tmpdir(), path.basename(filePath));
 37 |   const metadata = { contentType: contentType };
 38 |   return destBucket
 39 |     .file(filePath)
 40 |     .download({
 41 |       destination: tmpFilePath
 42 |     })
 43 |     .then(() => {
 44 |       return spawn("convert", [tmpFilePath, "-resize", "500x500", tmpFilePath]);
 45 |     })
 46 |     .then(() => {
 47 |       return destBucket.upload(tmpFilePath, {
 48 |         destination: "resized-" + path.basename(filePath),
 49 |         metadata: metadata
 50 |       });
 51 |     });
 52 | });
 53 | 
 54 | exports.uploadFile = functions.https.onRequest((req, res) => {
 55 |   cors(req, res, () => {
 56 |     if (req.method !== "POST") {
 57 |       return res.status(500).json({
 58 |         message: "Not allowed"
 59 |       });
 60 |     }
 61 |     const busboy = new Busboy({ headers: req.headers });
 62 |     let uploadData = null;
 63 | 
 64 |     busboy.on("file", (fieldname, file, filename, encoding, mimetype) => {
 65 |       const filepath = path.join(os.tmpdir(), filename);
 66 |       uploadData = { file: filepath, type: mimetype };
 67 |       file.pipe(fs.createWriteStream(filepath));
 68 |     });
 69 | 
 70 |     busboy.on("finish", () => {
 71 |       const bucket = gcs.bucket("fb-cloud-functions-demo.appspot.com");
 72 |       bucket
 73 |         .upload(uploadData.file, {
 74 |           uploadType: "media",
 75 |           metadata: {
 76 |             metadata: {
 77 |               contentType: uploadData.type
 78 |             }
 79 |           }
 80 |         })
 81 |         .then(() => {
 82 |           res.status(200).json({
 83 |             message: "It worked!"
 84 |           });
 85 |         })
 86 |         .catch(err => {
 87 |           res.status(500).json({
 88 |             error: err
 89 |           });
 90 |         });
 91 |     });
 92 |     busboy.end(req.rawBody);
 93 |   });
 94 | });
 95 | 
 96 | exports.onDataAdded = functions.database.ref('/message/{id}').onCreate(event => {
 97 |     const data = event.data.val();
 98 |     const newData = {
 99 |         msg: event.params.id + '-' + data.msg.toUpperCase()
100 |     };
101 |     return event.data.ref.child('copiedData').set(newData);
102 | });
103 | 


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/functions/package.json:
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 1 | {
 2 |   "name": "functions",
 3 |   "description": "Cloud Functions for Firebase",
 4 |   "scripts": {
 5 |     "serve": "firebase serve --only functions",
 6 |     "shell": "firebase experimental:functions:shell",
 7 |     "start": "npm run shell",
 8 |     "deploy": "firebase deploy --only functions",
 9 |     "logs": "firebase functions:log"
10 |   },
11 |   "dependencies": {
12 |     "@google-cloud/storage": "^1.5.1",
13 |     "busboy": "^0.2.14",
14 |     "child-process-promise": "^2.2.1",
15 |     "cors": "^2.8.4",
16 |     "firebase-admin": "~5.4.2",
17 |     "firebase-functions": "^0.7.1"
18 |   },
19 |   "private": true
20 | }
21 | 


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