From 50028e27b6b7c4a6105d5ee3c4644e4fdec1df18 Mon Sep 17 00:00:00 2001
From: Satyajit Dey <satyajit.dey@varnish-software.com>
Date: Fri, 15 May 2020 00:50:21 +0600
Subject: [PATCH] BE #1 & BE #2 Move Registration and Login code to express
 generated project

---
 app.js                                     |   51 +-
 bin/www                                    |   20 +-
 controllers/auth.controller.js             |   21 +
 controllers/users.controller.js            |   56 +
 middlewares/auth.permission.middleware.js  |   36 +
 middlewares/auth.validation.middleware.js  |   59 +
 middlewares/field.validation.middleware.js |   15 +
 middlewares/user.validation.middleware.js  |   53 +
 models/users.model.js                      |   93 +
 package-lock.json                          | 2886 +++++++++++++++++++-
 package.json                               |   46 +-
 routes/auth.route.js                       |   15 +
 routes/index.js                            |   11 -
 routes/users.js                            |    9 -
 routes/users.route.js                      |   46 +
 services/db.service.js                     |   30 +
 16 files changed, 3250 insertions(+), 197 deletions(-)
 create mode 100644 controllers/auth.controller.js
 create mode 100644 controllers/users.controller.js
 create mode 100644 middlewares/auth.permission.middleware.js
 create mode 100644 middlewares/auth.validation.middleware.js
 create mode 100644 middlewares/field.validation.middleware.js
 create mode 100644 middlewares/user.validation.middleware.js
 create mode 100644 models/users.model.js
 create mode 100644 routes/auth.route.js
 delete mode 100644 routes/index.js
 delete mode 100644 routes/users.js
 create mode 100644 routes/users.route.js
 create mode 100644 services/db.service.js

diff --git a/app.js b/app.js
index 259c05f..491556f 100644
--- a/app.js
+++ b/app.js
@@ -1,34 +1,35 @@
-var debug = require('debug')('cms-backend-api:*');
-var express = require('express');
-var logger = require('morgan');
-var mongoose=require('mongoose');
+const express = require('express');
+const logger = require('morgan');
+const bodyParser = require('body-parser');
+const UsersRouter = require('./routes/users.route');
+const AuthRouter = require('./routes/auth.route');
 
-//custom modules
-var indexRouter = require('./routes/index');
-var usersRouter = require('./routes/users');
-
-//connect to database
-var connect = mongoose.connect(process.env.DB_URL,{
-    autoIndex: false,
-    useNewUrlParser: true,
-    useUnifiedTopology: true
-});
-
-connect.then((db) => {
-    debug('Connected to database ' + process.env.DB_URL);
-}, (err) => { console.log(err); });
-
-
-
-var app = express();
+const app = express();
 
 //middleware
 app.use(logger('dev'));
 app.use(express.json());
 app.use(express.urlencoded({ extended: false }));
 
-//routes
-app.use('/', indexRouter);
-app.use('/users', usersRouter);
+app.use(function (req, res, next) {
+    res.header('Access-Control-Allow-Origin', '*');
+    res.header('Access-Control-Allow-Credentials', 'true');
+    res.header('Access-Control-Allow-Methods', 'GET,HEAD,PUT,PATCH,POST,DELETE');
+    res.header('Access-Control-Expose-Headers', 'Content-Length');
+    res.header('Access-Control-Allow-Headers', 'Accept, Authorization, Content-Type, X-Requested-With, Range');
+    if (req.method === 'OPTIONS') {
+        return res.send(200);
+    } else {
+        return next();
+    }
+});
+
+app.use(bodyParser.json());
+UsersRouter.routesConfig(app);
+AuthRouter.routesConfig(app);
+
+app.get(process.env.API_ENPOINT_BASE, (req, res) => {
+    res.send(`CMS API v1.`)
+});
 
 module.exports = app;
diff --git a/bin/www b/bin/www
index 16846fa..eea45ce 100644
--- a/bin/www
+++ b/bin/www
@@ -6,22 +6,22 @@
 const dotenv = require('dotenv');
 dotenv.config();
 
-var app = require('../app');
-var debug = require('debug')('cms-backend-api:*');
-var http = require('http');
+const app = require('../app');
+const debug = require('debug')('cms-backend-api:*');
+const http = require('http');
 
 /**
  * Get port from environment and store in Express.
  */
 
-var port = normalizePort(process.env.PORT || '3000');
+const port = normalizePort(process.env.PORT || '3000');
 app.set('port', port);
 
 /**
  * Create HTTP server.
  */
 
-var server = http.createServer(app);
+const server = http.createServer(app);
 
 /**
  * Listen on provided port, on all network interfaces.
@@ -36,7 +36,7 @@ server.on('listening', onListening);
  */
 
 function normalizePort(val) {
-  var port = parseInt(val, 10);
+  let port = parseInt(val, 10);
 
   if (isNaN(port)) {
     // named pipe
@@ -60,7 +60,7 @@ function onError(error) {
     throw error;
   }
 
-  var bind = typeof port === 'string'
+  let bind = typeof port === 'string'
     ? 'Pipe ' + port
     : 'Port ' + port;
 
@@ -84,9 +84,9 @@ function onError(error) {
  */
 
 function onListening() {
-  var addr = server.address();
-  var bind = typeof addr === 'string'
+  let addr = server.address();
+  let bind = typeof addr === 'string'
     ? 'pipe ' + addr
     : 'port ' + addr.port;
-  debug('Listening on ' + bind);
+  debug(`CMS Engine started and listening port: ${bind}`);
 }
diff --git a/controllers/auth.controller.js b/controllers/auth.controller.js
new file mode 100644
index 0000000..92a383c
--- /dev/null
+++ b/controllers/auth.controller.js
@@ -0,0 +1,21 @@
+const jwt = require('jsonwebtoken');
+const crypto = require('crypto');
+
+exports.login = (req, res) => {
+    try {
+        let refreshId = req.body.userId + process.env.AUTH_SECRET;
+        let salt = crypto.randomBytes(16).toString('base64');
+        let hash = crypto.createHmac('sha512', salt).update(refreshId).digest("base64");
+        req.body.refreshKey = salt;
+        let token = jwt.sign(req.body, process.env.AUTH_SECRET);
+        let b = new Buffer(hash);
+        let refresh_token = b.toString('base64');
+        res.status(201).send({accessToken: token, refreshToken: refresh_token});
+    } catch (err) {
+        res.status(500).send({errors: err});
+    }
+};
+
+exports.logout = (req, res) => {
+    res.status(204).send({accessToken: null, refreshToken: null});
+};
diff --git a/controllers/users.controller.js b/controllers/users.controller.js
new file mode 100644
index 0000000..8ae3f3b
--- /dev/null
+++ b/controllers/users.controller.js
@@ -0,0 +1,56 @@
+const UserModel = require('../models/users.model');
+const crypto = require('crypto');
+
+exports.insert = (req, res) => {
+    let salt = crypto.randomBytes(16).toString('base64');
+    let hash = crypto.createHmac('sha512', salt).update(req.body.password).digest("base64");
+    req.body.password = salt + "$" + hash;
+    UserModel.createUser(req.body)
+        .then((result) => {
+            res.status(201).send({id: result._id});
+        });
+};
+
+exports.list = (req, res) => {
+    let limit = req.query.limit && req.query.limit <= 100 ? parseInt(req.query.limit) : 10;
+    let page = 0;
+    if (req.query) {
+        if (req.query.page) {
+            req.query.page = parseInt(req.query.page);
+            page = Number.isInteger(req.query.page) ? req.query.page : 0;
+        }
+    }
+
+    UserModel.list(limit, page)
+        .then((result) => {
+            res.status(200).send(result);
+        })
+};
+
+exports.getById = (req, res) => {
+    UserModel.findById(req.params.userId)
+        .then((result) => {
+            res.status(200).send(result);
+        }).catch(err => res.status(400).send({'message': err.message}));
+};
+
+exports.patchById = (req, res) => {
+    if (req.body.password) {
+        let salt = crypto.randomBytes(16).toString('base64');
+        let hash = crypto.createHmac('sha512', salt).update(req.body.password).digest("base64");
+        req.body.password = salt + "$" + hash;
+    }
+
+    UserModel.patchUser(req.params.userId, req.body)
+        .then((result) => {
+            res.status(204).send({});
+        });
+
+};
+
+exports.removeById = (req, res) => {
+    UserModel.removeById(req.params.userId)
+        .then((result) => {
+            res.status(204).send({});
+        });
+};
\ No newline at end of file
diff --git a/middlewares/auth.permission.middleware.js b/middlewares/auth.permission.middleware.js
new file mode 100644
index 0000000..0b3fb19
--- /dev/null
+++ b/middlewares/auth.permission.middleware.js
@@ -0,0 +1,36 @@
+exports.minimumPermissionLevelRequired = (required_permission_level) => {
+    return (req, res, next) => {
+        let user_permission_level = parseInt(req.jwt.permissionLevel);
+        if (user_permission_level & required_permission_level) {
+            return next();
+        } else {
+            return res.status(403).send();
+        }
+    };
+};
+
+exports.onlySameUserOrAdminCanDoThisAction = (req, res, next) => {
+
+    let user_permission_level = parseInt(req.jwt.permissionLevel);
+    let userId = req.jwt.userId;
+    if (req.params && req.params.userId && userId === req.params.userId) {
+        return next();
+    } else {
+        if (user_permission_level & process.env.AUTH_PERMISSION_ADMIN) {
+            return next();
+        } else {
+            return res.status(403).send();
+        }
+    }
+
+};
+
+exports.sameUserCantDoThisAction = (req, res, next) => {
+    let userId = req.jwt.userId;
+
+    if (req.params.userId !== userId) {
+        return next();
+    } else {
+        return res.status(400).send();
+    }
+};
diff --git a/middlewares/auth.validation.middleware.js b/middlewares/auth.validation.middleware.js
new file mode 100644
index 0000000..efe02cd
--- /dev/null
+++ b/middlewares/auth.validation.middleware.js
@@ -0,0 +1,59 @@
+const {check} = require('express-validator');
+const crypto = require('crypto');
+const jwt = require('jsonwebtoken');
+const UserModel = require('../models/users.model');
+
+exports.authFieldValidationRules = () => {
+    return [
+        // email should not be empty
+        check('email', 'email empty').notEmpty(),
+        // email must be valid
+        check('email', 'email is not valid').isEmail().normalizeEmail(),
+        // password should not be empty
+        check('password', 'password empty').notEmpty()
+    ]
+};
+
+exports.matchEmailAndPassword = (req, res, next) => {
+    const {email, password} = req.body;
+    UserModel.findByEmail(email).then(user => {
+        if (!user) {
+            return res.status(404).send({errors: `User with email:<${email}> doesn't exist`});
+        } else {
+            let passwordFields = user.password.split('$');
+            let salt = passwordFields[0];
+            let hash = crypto.createHmac('sha512', salt).update(password).digest("base64");
+            if (hash === passwordFields[1]) {
+                req.body = {
+                    userId: user._id,
+                    email: user.email,
+                    permissionLevel: user.permissionLevel,
+                    provider: 'email',
+                    name: `${user.firstName} ${user.lastName}`,
+                };
+                return next();
+            } else {
+                return res.status(400).send({errors: 'Invalid e-mail or password'});
+            }
+        }
+    });
+};
+
+exports.verifyJwtToken = (req, res, next) => {
+    if (req.headers['authorization']) {
+        try {
+            let authorization = req.headers['authorization'].split(' ');
+            if (authorization[0] !== 'Bearer') {
+                return res.status(401).send();
+            } else {
+                req.jwt = jwt.verify(authorization[1], process.env.AUTH_SECRET);
+                return next();
+            }
+
+        } catch (err) {
+            return res.status(403).send();
+        }
+    } else {
+        return res.status(401).send();
+    }
+};
\ No newline at end of file
diff --git a/middlewares/field.validation.middleware.js b/middlewares/field.validation.middleware.js
new file mode 100644
index 0000000..d159d93
--- /dev/null
+++ b/middlewares/field.validation.middleware.js
@@ -0,0 +1,15 @@
+const {validationResult} = require('express-validator');
+
+exports.validateRules = (req, res, next) => {
+    const errors = validationResult(req);
+    if (errors.isEmpty()) {
+        return next();
+    }
+
+    const extractedErrors = [];
+    errors.array().map(err => extractedErrors.push({[err.param]: err.msg}));
+
+    return res.status(400).json({
+        errors: extractedErrors,
+    });
+};
\ No newline at end of file
diff --git a/middlewares/user.validation.middleware.js b/middlewares/user.validation.middleware.js
new file mode 100644
index 0000000..ffc8b8b
--- /dev/null
+++ b/middlewares/user.validation.middleware.js
@@ -0,0 +1,53 @@
+const mongoose = require('../services/db.service').mongoose;
+const UserModel = require('../models/users.model');
+
+const {check} = require('express-validator');
+
+exports.registrationFieldValidationRules = () => {
+    return [
+        // firstName should not be empty
+        check('firstName', 'firstName empty').notEmpty(),
+        // lastName should not be empty
+        check('lastName', 'lastName empty').notEmpty(),
+        // email should not be empty
+        check('email', 'email empty').notEmpty(),
+        // email must be valid
+        check('email', 'email is not valid').isEmail().normalizeEmail(),
+        // password should not be empty
+        check('password', 'password empty').notEmpty(),
+        // password must be at least 8 chars long
+        check('password', 'password must be at least 8 chars long').isLength({min: 8})
+    ]
+};
+
+exports.isEmailAlreadyExists = (req, res, next) => {
+    UserModel.findByEmail(req.body.email)
+        .then((result) => {
+            if (result) {
+                return res.status(409).json({message: 'Email already in use.'});
+            } else {
+                return next();
+            }
+        }).catch(err => res.status(500).json({errors: err}));
+};
+
+exports.verifyUserId = (req, res, next) => {
+    if (req.params.userId && mongoose.Types.ObjectId.isValid(req.params.userId)) {
+        return next();
+    }
+
+    return res.sendStatus(404);
+};
+
+exports.updatePasswordValidationRules = () => {
+    return [
+        check('email', 'email empty').notEmpty(),
+        // email must be valid
+        check('email', 'email is not valid').isEmail().normalizeEmail(),
+        // password should not be empty
+        check('password', 'password empty').notEmpty(),
+        // password must be at least 8 chars long
+        check('password', 'password must be at least 8 chars long').isLength({min: 8})
+    ]
+};
+
diff --git a/models/users.model.js b/models/users.model.js
new file mode 100644
index 0000000..515b7f2
--- /dev/null
+++ b/models/users.model.js
@@ -0,0 +1,93 @@
+const mongoose = require('../services/db.service').mongoose;
+
+const userSchema = new mongoose.Schema({
+    firstName: {type: String, required: true, trim: true},
+    lastName: {type: String, required: true, trim: true},
+    email: {type: String, unique: true, required: true, trim: true},
+    password: {type: String, required: true},
+    permissionLevel: {type: Number, default: 1},
+    createdAt: {type: Date, default: Date.now},
+    lastModified: {type: Date, default: Date.now}
+});
+
+const Users = mongoose.model('User', userSchema);
+
+// Rather than exposing Document's _id expose virtual id fields that is derived from _id
+// Remember you can not query by virtual fields in Mongoose
+// Details - https://mongoosejs.com/docs/tutorials/virtuals.html
+userSchema.virtual('id').get(function () {
+    return this._id.toHexString();
+});
+
+// Serialize virtual fields
+userSchema.set('toJSON', {
+    virtuals: true
+});
+
+userSchema.findById = function (cb) {
+    return this.model('User').find({id: this.id}, cb);
+};
+
+
+exports.findByEmail = (email) => {
+    return Users.findOne({email: email});
+};
+
+exports.findById = (id) => {
+    return Users.findById(id)
+        .then((result) => {
+            result = result.toJSON();
+            delete result._id;
+            delete result.__v;
+            return result;
+        });
+};
+
+exports.createUser = (userData) => {
+    const user = new Users(userData);
+
+    return user.save();
+};
+
+exports.list = (perPage, page) => {
+    return new Promise((resolve, reject) => {
+        Users.find()
+            .limit(perPage)
+            .skip(perPage * page)
+            .exec(function (err, users) {
+                if (err) {
+                    reject(err);
+                } else {
+                    resolve(users);
+                }
+            })
+    });
+};
+
+exports.patchUser = (id, userData) => {
+    return new Promise((resolve, reject) => {
+        Users.findById(id, function (err, user) {
+            if (err) reject(err);
+            for (let i in userData) {
+                user[i] = userData[i];
+            }
+            user.save(function (err, updatedUser) {
+                if (err) return reject(err);
+                resolve(updatedUser);
+            });
+        });
+    })
+
+};
+
+exports.removeById = (userId) => {
+    return new Promise((resolve, reject) => {
+        Users.remove({_id: userId}, (err) => {
+            if (err) {
+                reject(err);
+            } else {
+                resolve(err);
+            }
+        });
+    });
+};
diff --git a/package-lock.json b/package-lock.json
index f6e8901..e7a9697 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,59 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "@babel/code-frame": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.8.3.tgz",
+      "integrity": "sha512-a9gxpmdXtZEInkCSHUJDLHZVBgb1QS0jhss4cPP93EW7s+uC5bikET2twEF3KV+7rDblJcmNvTR7VJejqd2C2g==",
+      "dev": true,
+      "requires": {
+        "@babel/highlight": "^7.8.3"
+      }
+    },
+    "@babel/helper-validator-identifier": {
+      "version": "7.9.5",
+      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.9.5.tgz",
+      "integrity": "sha512-/8arLKUFq882w4tWGj9JYzRpAlZgiWUJ+dtteNTDqrRBz9Iguck9Rn3ykuBDoUwh2TO4tSAJlrxDUOXWklJe4g==",
+      "dev": true
+    },
+    "@babel/highlight": {
+      "version": "7.9.0",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.9.0.tgz",
+      "integrity": "sha512-lJZPilxX7Op3Nv/2cvFdnlepPXDxi29wxteT57Q965oc5R9v86ztx0jfxVrTcBk8C2kcPkkDa2Z4T3ZsPPVWsQ==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-validator-identifier": "^7.9.0",
+        "chalk": "^2.0.0",
+        "js-tokens": "^4.0.0"
+      }
+    },
+    "@sindresorhus/is": {
+      "version": "0.14.0",
+      "resolved": "https://registry.npmjs.org/@sindresorhus/is/-/is-0.14.0.tgz",
+      "integrity": "sha512-9NET910DNaIPngYnLLPeg+Ogzqsi9uM4mSboU5y6p8S5DzMTVEsJZrawi+BoDNUVBa2DhJqQYUFvMDfgU062LQ==",
+      "dev": true
+    },
+    "@szmarczak/http-timer": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@szmarczak/http-timer/-/http-timer-1.1.2.tgz",
+      "integrity": "sha512-XIB2XbzHTN6ieIjfIMV9hlVcfPU26s2vafYWQcZHWXHOxiaRZYEDKEwdl129Zyg50+foYV2jCgtrqSA6qNuNSA==",
+      "dev": true,
+      "requires": {
+        "defer-to-connect": "^1.0.1"
+      }
+    },
+    "@types/color-name": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz",
+      "integrity": "sha512-rr+OQyAjxze7GgWrSaJwydHStIhHq2lvY3BOC2Mj7KnzI7XK0Uw1TOOdI9lDoajEbSWLiYgoo4f1R51erQfhPQ==",
+      "dev": true
+    },
+    "abbrev": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
+      "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==",
+      "dev": true
+    },
     "accepts": {
       "version": "1.3.7",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
@@ -13,11 +66,138 @@
         "negotiator": "0.6.2"
       }
     },
+    "acorn": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.2.0.tgz",
+      "integrity": "sha512-apwXVmYVpQ34m/i71vrApRrRKCWQnZZF1+npOD0WV5xZFfwWOmKGQ2RWlfdy9vWITsenisM8M0Qeq8agcFHNiQ==",
+      "dev": true
+    },
+    "acorn-jsx": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.2.0.tgz",
+      "integrity": "sha512-HiUX/+K2YpkpJ+SzBffkM/AQ2YE03S0U1kjTLVpoJdhZMOWy8qvXVN9JdLqv2QsaQ6MPYQIuNmwD8zOiYUofLQ==",
+      "dev": true
+    },
+    "ajv": {
+      "version": "6.12.2",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.2.tgz",
+      "integrity": "sha512-k+V+hzjm5q/Mr8ef/1Y9goCmlsK4I6Sm74teeyGvFk1XrOsbsKLjEdrvny42CZ+a8sXbk8KWpY/bDwS+FLL2UQ==",
+      "dev": true,
+      "requires": {
+        "fast-deep-equal": "^3.1.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
+      }
+    },
+    "ansi-align": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/ansi-align/-/ansi-align-3.0.0.tgz",
+      "integrity": "sha512-ZpClVKqXN3RGBmKibdfWzqCY4lnjEuoNzU5T0oEFpfd/z5qJHVarukridD4juLO2FXMiwUQxr9WqQtaYa8XRYw==",
+      "dev": true,
+      "requires": {
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+          "dev": true,
+          "requires": {
+            "has-flag": "^4.0.0"
+          }
+        }
+      }
+    },
+    "uri-js": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
+      "integrity": "sha512-KY9Frmirql91X2Qgjry0Wd4Y+YTdrdZheS8TFwvkbLWf/G5KNJDCh6pKL5OZctEW4+0Baa5idK2ZQuELRwPznQ==",
+      "dev": true,
+      "requires": {
+        "punycode": "^2.1.0"
+      }
+    },
+    "url-parse-lax": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/url-parse-lax/-/url-parse-lax-3.0.0.tgz",
+      "integrity": "sha1-FrXK/Afb42dsGxmZF3gj1lA6yww=",
+      "dev": true,
+      "requires": {
+        "prepend-http": "^2.0.0"
+      }
+    },
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
@@ -607,10 +2999,232 @@
       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
       "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
     },
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+      "integrity": "sha512-usZBT3PW+LOjM25wbqIlZwPeJV+3OSz3M1k1Ws8snlW39dZyYL9lOGC5FgPVHfk0jKmjiDV8Z0mIbVQPiwFs7g==",
+      "dev": true
+    },
+    "validator": {
+      "version": "12.2.0",
+      "resolved": "https://registry.npmjs.org/validator/-/validator-12.2.0.tgz",
+      "integrity": "sha512-jJfE/DW6tIK1Ek8nCfNFqt8Wb3nzMoAbocBF6/Icgg1ZFSBpObdnwVY2jQj6qUqzhx5jc71fpvBWyLGO7Xl+nQ=="
+    },
     "vary": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
       "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
+    },
+    "which": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+      "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+      "dev": true,
+      "requires": {
+        "isexe": "^2.0.0"
+      }
+    },
+    "which-module": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
+      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=",
+      "dev": true
+    },
+    "wide-align": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
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+          "requires": {
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+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
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+        "find-up": "^3.0.0",
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+        "require-directory": "^2.1.1",
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+        "string-width": "^3.0.0",
+        "which-module": "^2.0.0",
+        "y18n": "^4.0.0",
+        "yargs-parser": "^13.1.2"
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+        "emoji-regex": {
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+            "strip-ansi": "^5.1.0"
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+        }
+      }
+    },
+    "yargs-parser": {
+      "version": "13.1.2",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-13.1.2.tgz",
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+      "dev": true,
+      "requires": {
+        "camelcase": "^5.0.0",
+        "decamelize": "^1.2.0"
+      }
+    },
+    "yargs-unparser": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-1.6.0.tgz",
+      "integrity": "sha512-W9tKgmSn0DpSatfri0nx52Joq5hVXgeLiqR/5G0sZNDoLZFOr/xjBUDcShCOGNsBnEMNo1KAMBkTej1Hm62HTw==",
+      "dev": true,
+      "requires": {
+        "flat": "^4.1.0",
+        "lodash": "^4.17.15",
+        "yargs": "^13.3.0"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index 01c8991..fa241db 100644
--- a/package.json
+++ b/package.json
@@ -2,15 +2,49 @@
   "name": "cms-backend-api",
   "version": "1.0.0",
   "private": true,
+  "description": "Simple CMS backend",
   "scripts": {
-    "start": "node ./bin/www"
+    "start": "node ./bin/www",
+    "test": "mocha"
   },
+  "author": "Satyajit Dey<satyajit@cefalo.com>",
+  "contributors": [
+    {
+      "name": "Ahmed Maruf",
+      "email": "maruf@cefalo.com"
+    },
+    {
+      "name": "Atiqul Alam",
+      "email": "atiqul@cefalo.com"
+    },
+    {
+      "name": "Rezaul Karim",
+      "email": "tito@cefalo.com"
+    },
+    {
+      "name": "Satyajit Dey",
+      "email": "satyajit@cefalo.com"
+    }
+  ],
+  "license": "ISC",
   "dependencies": {
     "debug": "2.6.9",
-    "dotenv": "^8.2.0",
-    "express": "4.16.1",
-    "mongodb": "^3.5.7",
-    "mongoose": "^5.9.14",
-    "morgan": "1.9.1"
+    "dotenv": "8.2.0",
+    "body-parser": "1.19.0",
+    "express": "4.17.1",
+    "express-validator": "6.4.0",
+    "jsonwebtoken": "8.5.1",
+    "mongoose": "5.9.10",
+    "morgan": "1.10.0",
+    "passport": "0.4.1"
+  },
+  "devDependencies": {
+    "eslint": "6.8.0",
+    "mocha": "7.1.2",
+    "nodemon": "2.0.3"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/Cefalo/cms-backend-api.git"
   }
 }
diff --git a/routes/auth.route.js b/routes/auth.route.js
new file mode 100644
index 0000000..85ca883
--- /dev/null
+++ b/routes/auth.route.js
@@ -0,0 +1,15 @@
+const AuthorizationController = require('../controllers/auth.controller');
+const FieldValidateMiddleware = require("../middlewares/field.validation.middleware");
+const AuthValidationMiddleware = require("../middlewares/auth.validation.middleware");
+
+exports.routesConfig = function (app) {
+
+    app.post('/auth/token', [
+        AuthValidationMiddleware.authFieldValidationRules(), [
+            FieldValidateMiddleware.validateRules,
+            AuthValidationMiddleware.matchEmailAndPassword
+        ], AuthorizationController.login
+    ]);
+
+    app.get('/auth/logout', AuthorizationController.logout);
+};
\ No newline at end of file
diff --git a/routes/index.js b/routes/index.js
deleted file mode 100644
index 5cbc20e..0000000
--- a/routes/index.js
+++ /dev/null
@@ -1,11 +0,0 @@
-var express = require('express');
-var router = express.Router();
-
-/* GET home page. */
-router.get('/', function(req, res, next) {
-  res.statusCode=200;
-  res.setHeader('Content-Type', 'text/html');
-  res.end('Hello world');
-});
-
-module.exports = router;
diff --git a/routes/users.js b/routes/users.js
deleted file mode 100644
index 623e430..0000000
--- a/routes/users.js
+++ /dev/null
@@ -1,9 +0,0 @@
-var express = require('express');
-var router = express.Router();
-
-/* GET users listing. */
-router.get('/', function(req, res, next) {
-  res.send('respond with a resource');
-});
-
-module.exports = router;
diff --git a/routes/users.route.js b/routes/users.route.js
new file mode 100644
index 0000000..ea7a16f
--- /dev/null
+++ b/routes/users.route.js
@@ -0,0 +1,46 @@
+const UsersController = require('../controllers/users.controller');
+
+const UserValidationMiddleware = require('../middlewares/user.validation.middleware');
+const FieldValidateMiddleware = require('../middlewares/field.validation.middleware');
+const AuthValidationMiddleware = require("../middlewares/auth.validation.middleware");
+const AuthPermissionMiddleware = require("../middlewares/auth.permission.middleware");
+
+exports.routesConfig = function (app) {
+    app.post(`${process.env.API_ENPOINT_BASE}/users`,
+        //Pass validation rules
+        UserValidationMiddleware.registrationFieldValidationRules(), [
+            //Validate the rule(s)
+            FieldValidateMiddleware.validateRules,
+            UserValidationMiddleware.isEmailAlreadyExists
+        ],
+        //Pass the actual operation middleware
+        UsersController.insert);
+
+    app.get(`${process.env.API_ENPOINT_BASE}/users`, [
+        AuthValidationMiddleware.verifyJwtToken,
+        AuthPermissionMiddleware.minimumPermissionLevelRequired(process.env.AUTH_PERMISSION_ADMIN)
+    ], UsersController.list);
+
+    app.get(`${process.env.API_ENPOINT_BASE}/users/:userId`, [
+        UserValidationMiddleware.verifyUserId,
+        AuthValidationMiddleware.verifyJwtToken,
+        AuthPermissionMiddleware.minimumPermissionLevelRequired(process.env.AUTH_PERMISSION_VIEWER),
+        AuthPermissionMiddleware.onlySameUserOrAdminCanDoThisAction
+    ], UsersController.getById);
+
+    app.patch(`${process.env.API_ENPOINT_BASE}/users/:userId`,
+        UserValidationMiddleware.updatePasswordValidationRules(), [
+            FieldValidateMiddleware.validateRules,
+            UserValidationMiddleware.verifyUserId,
+            AuthValidationMiddleware.verifyJwtToken,
+            AuthPermissionMiddleware.minimumPermissionLevelRequired(process.env.AUTH_PERMISSION_VIEWER),
+            AuthPermissionMiddleware.onlySameUserOrAdminCanDoThisAction
+        ], UsersController.patchById);
+
+    app.delete(`${process.env.API_ENPOINT_BASE}/users/:userId`, [
+        UserValidationMiddleware.verifyUserId,
+        AuthValidationMiddleware.verifyJwtToken,
+        AuthPermissionMiddleware.minimumPermissionLevelRequired(process.env.AUTH_PERMISSION_ADMIN),
+        AuthPermissionMiddleware.sameUserCantDoThisAction
+    ], UsersController.removeById);
+};
diff --git a/services/db.service.js b/services/db.service.js
new file mode 100644
index 0000000..8493684
--- /dev/null
+++ b/services/db.service.js
@@ -0,0 +1,30 @@
+const debug = require('debug')('cms-backend-api:*');
+const mongoose = require('mongoose');
+
+let count = 0;
+
+const options = {
+    autoIndex: false, // Don't build indexes
+    reconnectTries: 30, // Retry up to 30 times
+    reconnectInterval: 500, // Reconnect every 500ms
+    poolSize: 10, // Maintain up to 10 socket connections
+    // If not connected, return errors immediately rather than waiting for reconnect
+    bufferMaxEntries: 0,
+    //get rid off the depreciation errors
+    useNewUrlParser: true,
+    useUnifiedTopology: true
+
+};
+const connectWithRetry = () => {
+    console.log('MongoDB connection with retry')
+    mongoose.connect(process.env.DB_URL, options).then(() => {
+        debug('MongoDB is connected')
+    }).catch(err => {
+        console.log('MongoDB connection unsuccessful, retry after 5 seconds. ', ++count);
+        setTimeout(connectWithRetry, 5000)
+    })
+};
+
+connectWithRetry();
+
+exports.mongoose = mongoose;