add user model

README.md

@@ -34,7 +34,6 @@ Set-Up
 
 Resources
 =================================
-* [The Complete Guide To Building Scalable Apps On AWS](https://www.airpair.com/aws/posts/building-a-scalable-web-app-on-amazon-web-services-p1)
 *  [List Of AWS Tips](https://wblinks.com/notes/aws-tips-i-wish-id-known-before-i-started/)
 * [Amazon Monthly Cost Estimate Calculator](http://calculator.s3.amazonaws.com/index.html)
 * [Set-Up AWS Billing Alerts](http://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/monitor-charges.html)

lib/index.js

@@ -10,6 +10,7 @@
 
 module.exports.models = {
 
-    AWS: require('./models/model_aws')
+    AWS: require('./models/model_aws'),
+    User: require('./models/model_user')
 
 };

lib/models/model_user.js

@@ -0,0 +1,270 @@
+/**
+ * Model: Users
+ * - users of your application
+ */
+
+
+// Dependencies
+var Config = require('../config/config');
+var Utilities = require('../utilities/utilities');
+var AppDynamoDB = require('./model_aws').DynamoDB;
+
+var moment = require('moment');
+var bcryptjs = require('bcryptjs');
+var _ = require('lodash');
+var validator = require('validator');
+
+
+
+module.exports = new User();
+
+
+
+function User() {}
+
+
+
+/**
+ * SignUp
+ */
+
+User.prototype.signUp = function(data, callback) {
+
+    // Defaults
+    var _this = this;
+
+
+    /**
+     * Validate
+     */
+
+    if (!data.email) return callback({
+        status: 400,
+        message: 'Bad Request: Email is required'
+    }, null);
+
+    if (!data.password) return callback({
+        status: 400,
+        message: 'Bad Request: Password is required'
+    }, null);
+
+    if (data.password && data.password.length < 8) return callback({
+        status: 400,
+        message: 'Bad Request: Password must be at least 8 characters long'
+    }, null);
+
+
+
+    // Check if email is already in use
+    _this.showByEmail(data.email, function(error, user) {
+
+        if (error) return callback(error, null);
+
+        if (user) return callback({
+            status: 409,
+            message: 'Email is already in use'
+        }, null);
+
+
+
+        /**
+         * Instantiate
+         */
+
+        var user = {
+            _id: Utilities.generateID('user'),
+            email: data.email ? data.email : null,
+            password: data.password ? data.password : null,
+            created: moment().unix(),
+            updated: moment().unix(),
+            plan: 'free',
+            sign_in_count: 0
+        };
+
+
+        // Hash Password
+        user = _this.hashPassword(user);
+
+
+
+        /**
+         * Save
+         */
+
+        _this.save(user, function(error, user) {
+
+            if (error) return (error, null);
+
+            return callback(null, user);
+
+        });
+    });
+}
+
+
+
+
+
+/**
+ * ShowByEmail
+ */
+
+User.prototype.showByEmail = function(email, callback) {
+
+
+    /**
+     * Validate
+     */
+
+    if (!email) return callback({
+        status: 400,
+        message: 'Bad Request: Email is required'
+    }, null);
+
+
+
+    /**
+     * Find User
+     */
+
+    var params = {};
+    params.TableName = "app_users";
+    params.IndexName = "email-index";
+    params.KeyConditions = [
+        AppDynamoDB.Condition("email", "EQ", email)
+    ];
+
+    AppDynamoDB.query(params, function(error, response) {
+
+        if (error || !response) return callback({
+            status: 500,
+            message: 'Sorry, something went wrong.'
+            raw: error
+        }, null);
+
+        return callback(null, response.Items && response.Items[0] ? response.Items[0] : null);
+
+    });
+}
+
+
+
+
+/**
+ * Save
+ * - Updates existing record or creates a record if one does not already exist
+ */
+
+User.prototype.save = function(data, callback) {
+
+
+    /**
+     * Validate
+     */
+
+    if (!data.email) return callback({
+        status: 400,
+        message: 'Bad Request: Email is required'
+    }, null);
+
+    if (!data.password) return callback({
+        status: 400,
+        message: 'Bad Request: Password is required'
+    }, null);
+
+
+    /**
+     * Perform Save
+     */
+
+    var params = {
+        TableName: 'app_users',
+        ReturnValues: 'ALL_NEW',
+        Key: {
+            '_id': user._id
+        },
+        UpdateExpression: 'SET ',
+        ExpressionAttributeNames: {},
+        ExpressionAttributeValues: {}
+    };
+
+
+    /**
+     * Basic Information
+     */
+
+
+    // email
+    params.UpdateExpression = params.UpdateExpression + '#a0 = :email_val, ';
+    params.ExpressionAttributeNames['#a0'] = 'email';
+    params.ExpressionAttributeValues[':email_val'] = user.email;
+
+    // password
+    params.UpdateExpression = params.UpdateExpression + '#a1 = :password_val, ';
+    params.ExpressionAttributeNames['#a1'] = 'password';
+    params.ExpressionAttributeValues[':password_val'] = user.password;
+
+    // salt
+    params.UpdateExpression = params.UpdateExpression + '#a2 = :salt_val, ';
+    params.ExpressionAttributeNames['#a2'] = 'salt';
+    params.ExpressionAttributeValues[':salt_val'] = user.salt;
+
+    // plan
+    params.UpdateExpression = params.UpdateExpression + '#a3 = :plan_val, ';
+    params.ExpressionAttributeNames['#a3'] = 'plan';
+    params.ExpressionAttributeValues[':plan_val'] = user.plan;
+
+    // sign_in_count
+    params.UpdateExpression = params.UpdateExpression + '#a4 = :sign_in_count_val, ';
+    params.ExpressionAttributeNames['#a4'] = 'sign_in_count';
+    params.ExpressionAttributeValues[':sign_in_count_val'] = user.sign_in_count;
+
+    // updated
+    params.UpdateExpression = params.UpdateExpression + '#b0 = :updated_val, ';
+    params.ExpressionAttributeNames['#b0'] = 'updated';
+    params.ExpressionAttributeValues[':updated_val'] = moment().unix();
+
+    // created
+    if (isNaN(user.created)) user.created = moment(user.created).unix();
+    params.UpdateExpression = params.UpdateExpression + '#b1 = :created_val, ';
+    params.ExpressionAttributeNames['#b1'] = 'created';
+    params.ExpressionAttributeValues[':created_val'] = user.created;
+
+
+
+    /**
+     * Save
+     */
+
+    // Remove Any Trailing Commas & Space
+    params.UpdateExpression = params.UpdateExpression.trim();
+    if (params.UpdateExpression[params.UpdateExpression.length - 1] === ',') params.UpdateExpression = params.UpdateExpression.substring(0, params.UpdateExpression.length - 1);
+
+
+    AppDynamoDB.updateItem(params, function(error, response) {
+
+        if (error || !response) return callback({
+            status: 500,
+            raw: error
+        }, null);
+
+        return callback(null, response.Attributes);
+
+    });
+}
+
+
+
+
+/**
+ * Hash Password
+ */
+
+User.prototype.hashPassword = function(user) {
+
+    user.salt = bcryptjs.genSaltSync(10);
+    user.password = bcryptjs.hashSync(user.password, user.salt);
+
+    return user;
+
+};

lib/utilities/utilities.js

@@ -0,0 +1,28 @@
+/**
+ * Utilities
+ */
+
+
+module.exports = new Utilities();
+
+
+function Utilities() {}
+
+
+/**
+ * Generate ID
+ * - Generates a unique ID for a data record
+ * - Prefixs each id with a type
+ */
+
+Utilities.prototype.generateID = function(type) {
+
+    switch (type) {
+
+        case 'user':
+
+            return 'u_' + uuid.v1();
+
+    }
+
+};