Overview:

• This project is a summary of this back-end trimester: authentication, NodeJS, MongoDB, Redis, pagination and background processing.

• The objective is to build a simple platform to upload and view files:

• User authentication via a token
• List all files
• Upload a new file
• Change permission of a file
• View a file
• Generate thumbnails for images

Core technologies

Testing and Jobs

A queueing job mechanism for creating thumbnails of photos uploaded to the application is included in the project. When a new user is created, it also leverages this feature to generate a welcome message. Bull is used in all of this. 

Mocha is used in combination with Chai for testing the app.

Resources

Read or watch:

• Node JS getting started
• Process API doc
• Express getting started
• Mocha documentation
• Nodemon documentation
• MongoDB
• Bull
• Image thumbnail
• Mime-Types
• Redis

Learning Objectives

• At the end of this project, you are expected to be able to explain to anyone, without the help of Google:

• how to create an API with Express
• how to authenticate a user
• how to store data in MongoDB
• how to store temporary data in Redis
• how to setup and use a background worker

Requirements

• Allowed editors: vi, vim, emacs, Visual Studio Code
• All your files will be interpreted/compiled on Ubuntu 18.04 LTS using node (version 12.x.x)
• All your files should end with a new line
• A README.md file, at the root of the folder of the project, is mandatory
• Your code should use the js extension
• Your code will be verified against lint using ESLint

Provided files

@FileManager
 {
  "name": "files_manager",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "lint": "./node_modules/.bin/eslint",
    "check-lint": "lint [0-9]*.js",
    "start-server": "nodemon --exec babel-node --presets @babel/preset-env ./server.js",
    "start-worker": "nodemon --exec babel-node --presets @babel/preset-env ./worker.js",
    "dev": "nodemon --exec babel-node --presets @babel/preset-env",
    "test": "./node_modules/.bin/mocha --require @babel/register --exit" 
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "bull": "^3.16.0",
    "chai-http": "^4.3.0",
    "express": "^4.17.1",
    "image-thumbnail": "^1.0.10",
    "mime-types": "^2.1.27",
    "mongodb": "^3.5.9",
    "redis": "^2.8.0",
    "sha1": "^1.1.1",
    "uuid": "^8.2.0"
  },
  "devDependencies": {
    "@babel/cli": "^7.8.0",
    "@babel/core": "^7.8.0",
    "@babel/node": "^7.8.0",
    "@babel/preset-env": "^7.8.2",
    "@babel/register": "^7.8.0",
    "chai": "^4.2.0",
    "chai-http": "^4.3.0",
    "mocha": "^6.2.2",
    "nodemon": "^2.0.2",
    "eslint": "^6.4.0",
    "eslint-config-airbnb-base": "^14.0.0",
    "eslint-plugin-import": "^2.18.2",
    "eslint-plugin-jest": "^22.17.0",
    "request": "^2.88.0",
    "sinon": "^7.5.0"
  }
}

.eslintrc.js

@eslintrc.js

@code module.exports = {
    env: {
      browser: false,
      es6: true,
      jest: true,
    },
    extends: [
      'airbnb-base',
      'plugin:jest/all',
    ],
    globals: {
      Atomics: 'readonly',
      SharedArrayBuffer: 'readonly',
    },
    parserOptions: {
      ecmaVersion: 2018,
      sourceType: 'module',
    },
    plugins: ['jest'],
    rules: {
      'max-classes-per-file': 'off',
      'no-underscore-dangle': 'off',
      'no-console': 'off',
      'no-shadow': 'off',
      'no-restricted-syntax': [
        'error',
        'LabeledStatement',
        'WithStatement',
      ],
    },
    overrides:[
      {
        files: ['*.js'],
        excludedFiles: 'babel.config.js',
      }
    ]
};

babel.config.js

@babel.config.js
 module.exports = {
    presets: [
      [
        '@babel/preset-env',
        {
          targets: {
            node: 'current',
          },
        },
      ],
    ],
};

and…

Don’t forget to run $ npm install when you have the package.json