Food App Case Study | Mradul Rathore

.gitignore

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Mradul-Rathore-Food-App-Case-Study/README.md

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+# Problem Statement
+
+It is known fact that in today’s work-from-home world, people prefer ordering food that can be delivered at the comfort of their home. So most of the times people end up ordering food from restaurants that have delivery services. The objective of this problem statement is to come up with a solution for people to order food online and get prompt delivery. You need to solve the given problem by developing a web application, that should facilitate users to order food online from different restaurants using the web-app to cater their needs. 
+
+# Scope of work
+
+You have been asked to build the backend system for the following:
+- Registration
+- Login and
+- Display the list of Food items 
+
+## API Endpoints
+
+- /api/register
+    - To register the user with basic
+details
+- /api/authenticate 
+    - To validate the user is registered in the system
+- /api/users 
+    - To get all the users who are registered to the system, the end point should return an array
+- /api/users/:userID 
+    - To return user by specifying id 
+- /api/users 
+    - Should update the user specified in the payload which shall match the ID and updated the existing user with the new details
+- /api/users/:userID
+    - Should delete the user which is specified in the :userID 
+- /api/food 
+    - To add a new food to the system
+- /api/food/:foodID 
+    - To return a food item specified with :foodID 

Mradul-Rathore-Food-App-Case-Study/app/config/db.config.js

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+const mongoose = require("mongoose");
+mongoose.Promise = global.Promise;
+
+const db = {};
+db.mongoose = mongoose;
+db.url = process.env.MONGO_URI;
+db.users = require("../models/user.model")(mongoose);
+db.foods = require("../models/food.model")(mongoose);
+db.port = process.env.PORT
+
+module.exports = db;

Mradul-Rathore-Food-App-Case-Study/app/controllers/food.controller.js

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+const db = require("../config/db.config")
+const Food = db.foods;
+
+//register user
+exports.addFood = async (req, res) => {
+
+    try {
+        // Get user input
+        const { foodId, foodName, foodCost, foodType } = req.body;
+
+        // Validate food type
+        if (foodType != "Indian" && foodType != "Mexican" && foodType != "Chinese") {
+            res.status(400).send("Food type is not valid. Valide types: Indian/Mexican/Chinese");
+        }
+
+        // check if food already exist
+        // Validate if food exist in our database
+        const oldFood = await Food.findOne({ foodId });
+
+        if (oldFood) {
+            return res.status(409).send("Food Already Exist.");
+        }
+
+        // Create food in our database
+        const food = await Food.create({
+            foodId: foodId,
+            foodName: foodName,
+            foodCost: foodCost,
+            foodType: foodType,
+        });
+
+        // return new food
+        res.status(201).json(food);
+    } catch (err) {
+        console.log(err);
+    }
+};
+
+//fetch food by id
+exports.fetchFoodById = async (req, res) => {
+    const foodId = req.params.id;
+
+    const food = await Food.findOne({ foodId });
+
+    if (!food)
+        res.status(404).send({ message: "Sorry Food Not Found" })
+    else
+        res.send(food);
+}
+
+

Mradul-Rathore-Food-App-Case-Study/app/controllers/user.controller.js

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+const db = require("../config/db.config")
+
+const { registerationValidation } = require('../../validation')
+const User = db.users;
+const bcrypt = require("bcryptjs")
+const jwt = require("jsonwebtoken")
+
+//register user
+exports.registerUser = async (req, res) => {
+
+    try {
+        // Validate user input
+        const { error } = registerationValidation(req.body)
+        if (error) {
+            return res.status(400).send(error.details[0].message)
+        }
+
+        // Get user input
+        const { username, email, password, address } = req.body;
+
+        // check if user already exist
+        // Validate if user exist in our database
+        const oldUser = await User.findOne({ email });
+
+        if (oldUser) {
+            return res.status(409).send("User Already Exist. Please Login");
+        }
+
+        //Encrypt user password
+        encryptedPassword = await bcrypt.hash(password, 10);
+
+        // Create user in our database
+        const user = await User.create({
+            username: username,
+            email: email.toLowerCase(), // sanitize: convert email to lowercase
+            password: encryptedPassword,
+            address: address
+        });
+
+        // Create token
+        const token = jwt.sign(
+            { user_id: user._id, email },
+            process.env.TOKEN_KEY,
+            {
+                expiresIn: "24h",
+            }
+        );
+        // save user token
+        user.token = token;
+
+        // return new user
+        res.status(201).json(user);
+    } catch (err) {
+        console.log(err);
+    }
+};
+
+//authenticate user
+exports.authenticate = async (req, res) => {
+    // Our login logic starts here
+    try {
+        // Get user input
+        const { email, password } = req.body;
+
+        // Validate user input
+        if (!(email && password)) {
+            res.status(400).send("All input is required");
+        }
+
+        // Validate if user exist in our database
+        const user = await User.findOne({ email });
+
+        if (user && (await bcrypt.compare(password, user.password))) {
+            // Create token
+            const token = jwt.sign(
+                { user_id: user._id, email },
+                process.env.TOKEN_KEY,
+                {
+                    expiresIn: "24h",
+                }
+            );
+
+            // save user token
+            user.token = token;
+
+            const sucessMessage = {
+                message: "user logged in successful"
+            }
+            // user
+            res.status(200).json(sucessMessage);
+        }
+        res.status(403).send("Forbidden");
+    } catch (err) {
+        console.log(err);
+    }
+}
+
+//fetch all users
+exports.fetchAllUsers = (req, res) => {
+    User.find().then(data => {
+        res.send(data);
+    }).catch(err => {
+        res.status(500).send({
+            message: err.message || "error while retrieving the users."
+        })
+    })
+}
+
+//fetch user by id
+exports.fetchUserById = (req, res) => {
+    const id = req.params.id;
+    User.findById(id).then(
+        data => {
+            if (!data)
+                res.status(404).send({ message: "Sorry user With " + id + " not found" });
+            else
+                res.send(data);
+        }
+    ).catch(err => {
+        res.status(500).send({
+            message: err.message || "error while retrieving the user with id " + id
+        })
+    })
+}
+
+//update user by id
+exports.updateUserById = (req, res) => {
+    const id = req.body.id;
+
+    User.findOneAndUpdate({ _id: id }, req.body).then(function (user) {
+        User.findOne({ _id: id }).then(function (user) {
+            if (!user)
+                res.status(404).send({ message: "Sorry user with " + id + " not found" });
+            else
+                res.status(200).json(user);
+        })
+    }).catch(err => {
+        res.status(500).send({
+            message: err.message || "error updating the user with id " + id
+        })
+    })
+}
+
+//delete user by id
+exports.deleteUserById = (req, res) => {
+    const id = req.params.id;
+    User.findByIdAndRemove(id, { useFindAndModify: false }).then(
+        data => {
+            if (!data)
+                res.status(404).send({ message: "Sorry user with " + id + " not found" });
+            else
+                res.send({ message: "User deleted successfully" });
+        }
+    ).catch(err => {
+        res.status(500).send({
+            message: err.message || "error deleting the user with id " + id
+        })
+    })
+}