From d114de722aeab709a65002445a19cb2844b4a9da Mon Sep 17 00:00:00 2001 From: naman19feb Date: Mon, 15 Jan 2024 00:55:31 +0530 Subject: [PATCH 1/2] Done with hard problem --- week-3/04-course-app-hard/index.js | 173 +++++++++++++++++++++++++---- 1 file changed, 149 insertions(+), 24 deletions(-) diff --git a/week-3/04-course-app-hard/index.js b/week-3/04-course-app-hard/index.js index 32fff61e9..76e819c47 100644 --- a/week-3/04-course-app-hard/index.js +++ b/week-3/04-course-app-hard/index.js @@ -1,52 +1,177 @@ const express = require('express'); +const jwt = require('jsonwebtoken') +const mongoose = require('mongoose') const app = express(); -app.use(express.json()); +app.use(express.json()); // to read body + +const SECRET = 'wow,wow,Encryption' + + // Mongoose Schemas + + const userSchema = new mongoose.Schema({ + username : {type : String}, //below is same + password: String, + purchasedCourses : [{type: mongoose.Schema.Types.ObjectId, ref: 'Course'}] + }); + + const adminSchema = new mongoose.Schema({ + username : String, + password : String + }); + + const courseSchema = new mongoose.Schema({ + title : String, + description : String, + price : Number, + imageLink : String, + published : Boolean + }); + + +//Defining mongoose models + +const User = mongoose.model('User',userSchema); +const Admin = mongoose.model('Admin',adminSchema); +const Course = mongoose.model('Course', courseSchema); + +// middleware for authentication using Jwt + +function authenticateJwt(req,res,next){ + const authHeader = req.headers.authorization; + if(authHeader){ + const token = authHeader.split(" ")[1]; + jwt.verify(token,SECRET,(err,user)=>{ + if(err){ + return res.sendStatus(403); + } + req.user = user; + next(); + }) + } + else{ + res.sendStatus(401); + } +} + +//connecting to MongoDB + +mongoose.connect('mongodb+srv://naman19feb:YnuqdC_aiWj5kcn@cluster0.hl1az2k.mongodb.net/',{useNewUrlParser : true, useUnifiedTopology: true, dbName:"courses"}); + + -let ADMINS = []; -let USERS = []; -let COURSES = []; // Admin routes -app.post('/admin/signup', (req, res) => { - // logic to sign up admin +app.post('/admin/signup', async (req, res) => { + const {username,password} = req.body; + const admin = await Admin.findOne({username : username}); + if(admin){ + res.send("User Already Exsist!") + } + else{ + const obj = {username : username, password : password}; + const newAdmin = new Admin(obj); + await newAdmin.save(); + const token = jwt.sign({username, role: 'admin'},SECRET,{expiresIn : '1h'}); + res.json({message : 'Admin created Successfully', token}) + } }); -app.post('/admin/login', (req, res) => { - // logic to log in admin +app.post('/admin/login', async (req, res) => { + const {username, password} = req.body; + const admin = await Admin.findOne({username: username, password: password}); + if(admin){ + const token = jwt.sign({username , role:"admin"},SECRET,{expiresIn:"1h"}); + res.json({message : "Login Successfull!", token}) + } + else{ + res.status(403).json({message : 'Wrong credentials'}) + } + }); -app.post('/admin/courses', (req, res) => { - // logic to create a course +app.post('/admin/courses',authenticateJwt, async(req, res) => { + const course = new Course(req.body); + await course.save(); + res.status(200).json({message : "Course added Successfully", course}) }); -app.put('/admin/courses/:courseId', (req, res) => { - // logic to edit a course +app.put('/admin/courses/:courseId',authenticateJwt, async(req, res) => { + const update = await Course.findByIdAndUpdate(req.params.courseId,req.body,{new : true}); + if(update){ + res.json({message: "Updated successfully", update}) + } + else{ + res.status(404).json({message: "Course not found!"}) + } }); -app.get('/admin/courses', (req, res) => { - // logic to get all courses +app.get('/admin/courses',authenticateJwt, async (req, res) => { + const courses = await Course.find({}); + res.json(courses); }); // User routes -app.post('/users/signup', (req, res) => { - // logic to sign up user +app.post('/users/signup',async (req, res) => { + const {username, password} = req.body; + const user = await User.findOne({username : username}) + if(user){ + res.status(403).json({message : "User already exists"}) + } + else{ + const newUser = new User({username : username, password : password}); + await newUser.save(); + const token = jwt.sign({username, role :"user"},SECRET,{expiresIn : '1h'}); + res.status(200).json({message:"User added successfully ", token}); + } + }); -app.post('/users/login', (req, res) => { - // logic to log in user +app.post('/users/login', async(req, res) => { + const {username,password} = req.headers; + const user = await User.findOne({username:username , password:password}); + if(user){ + const token = jwt.sign({username, role:"user"},SECRET,{expiresIn:'1h'}); + res.status(200).json({message : "Login Successfull",token}); + } + else{ + res.status(403).json({message : "Authentication failed"}) + } + }); -app.get('/users/courses', (req, res) => { - // logic to list all courses +app.get('/users/courses',authenticateJwt, async (req, res) => { + const courses = await Course.find({published: true}); + res.json(courses); }); -app.post('/users/courses/:courseId', (req, res) => { - // logic to purchase a course +app.post('/users/courses/:courseId',authenticateJwt, async (req, res) => { + const course = await Course.findById(req.params.courseId); + if(course){ + const user = await User.findOne({username: req.headers.username}); + if(user){ + user.purchasedCourses.push(course); + await user.save(); + res.json("Course Purchased Successfully!"); + } + else{ + res.status(403).json({message : "User not found"}); + } + } + else{ + res.status(404).json({message : "Course not found"}); + } }); -app.get('/users/purchasedCourses', (req, res) => { - // logic to view purchased courses + +app.get('/users/purchasedCourses',authenticateJwt, async(req, res) => { + const user = await User.findOne({username : req.headers.username}).populate('purchasedCourses'); + if(user){ + res.json({purchasedCourses: user.purchasedCourses || []}); + } + else{ + res.status(403).json({message : "User not found"}); + } }); app.listen(3000, () => { From 3d1d8cf9d22cdec7c7cc46de22efccf77f9d27ca Mon Sep 17 00:00:00 2001 From: naman19feb Date: Mon, 29 Jan 2024 03:35:09 +0530 Subject: [PATCH 2/2] Done with 01-easy-todo-app of week 4 --- week-4/01-easy-todo-app/src/App.jsx | 59 ++++++++++++++++++++++------- 1 file changed, 46 insertions(+), 13 deletions(-) diff --git a/week-4/01-easy-todo-app/src/App.jsx b/week-4/01-easy-todo-app/src/App.jsx index c949df883..10650b0a2 100644 --- a/week-4/01-easy-todo-app/src/App.jsx +++ b/week-4/01-easy-todo-app/src/App.jsx @@ -1,27 +1,60 @@ -import { useState } from 'react' +import { useState, useEffect } from 'react' +import axios from "axios"; import reactLogo from './assets/react.svg' import viteLogo from '/vite.svg' +import React from 'react'; import './App.css' + +function getTodos(){ + let todos = []; + React.useEffect(()=>{ + axios.get("http://localhost:3000/todos").then((res)=>{ + todos = res.data; + }) + }) + return todos; +} +function deleteTodos(id){ + axios.delete("http://localhost:3000/todos"+"/"+id) +} +function createTodo(){ + axios.post("http://localhost:3000/todos",{ + title : "added from postButton", + description : "wow added" + }) +} function App() { - const [todos, setTodos] = useState([]) - // fetch all todos from server + var [todos, setTodos] = useState([]) + React.useEffect(()=>{ + axios.get("http://localhost:3000/todos").then((res)=>{ + setTodos(res.data); + }) + }) + return ( <> -
-

Easy Todo App

- -
- - ) + + {todos.map((todo)=>( +
+ deleteTodos(todo.id)}> +
+ ),[])} + + ) + + } function Todo(props) { // Add a delete button here so user can delete a TODO. - return
- {props.title} -
+ return (
+ {props.title} {' '} + {props.description}{' '} + +
) } +export default App; + -export default App