100xDevs-hkirat · keshavarg33 · Mar 6, 2024
diff --git a/.vscode/settings.json b/.vscode/settings.json
@@ -0,0 +1,6 @@
+{
+    "files.associations": {
+        "cmath": "cpp",
+        "complex": "cpp"
+    }
+}
diff --git a/week-2/Week-2-Assignments/02-nodejs/package-lock.json b/week-2/Week-2-Assignments/02-nodejs/package-lock.json
diff --git a/week-2/Week-2-Assignments/02-nodejs/package.json b/week-2/Week-2-Assignments/02-nodejs/package.json
@@ -21,6 +21,7 @@
     "testTimeout": 10000
   },
   "dependencies": {
+    "cors": "^2.8.5",
     "express": "^4.18.2",
     "uuid": "^9.0.0"
   }

diff --git a/week-2/Week-2-Assignments/02-nodejs/solutions/todoServer.solution.file.js b/week-2/Week-2-Assignments/02-nodejs/solutions/todoServer.solution.file.js
@@ -103,4 +103,6 @@ app.use((req, res, next) => {
   res.status(404).send();
 });
 
+app.listen(3000);
+
 module.exports = app;
diff --git a/week-2/Week-2-Assignments/02-nodejs/solutions/todoServer.solution.js b/week-2/Week-2-Assignments/02-nodejs/solutions/todoServer.solution.js
@@ -41,9 +41,9 @@
  */
 const express = require('express');
 const bodyParser = require('body-parser');
-
+const cors = require("cors");
 const app = express();
-
+app.use(cors());
 app.use(bodyParser.json());
 
 let todos = [];
@@ -97,4 +97,8 @@ app.use((req, res, next) => {
   res.status(404).send();
 });
 
+app.listen(3000, () => {
+   console.log("listening on 3000");
+});
+
 module.exports = app;
diff --git a/week-3/01-reconciler/index.html b/week-3/01-reconciler/index.html
@@ -9,7 +9,7 @@
 
 <body>
 <div id="mainArea"></div>
-<script src="script-ugly.js"></script>
+<script src="script-less-ugly.js"></script>
 </body>
 
 </html>
diff --git a/week-3/02-course-app-easy/index.js b/week-3/02-course-app-easy/index.js
@@ -1,54 +1,213 @@
 const express = require('express');
 const app = express();
-
 app.use(express.json());
 
+
 let ADMINS = [];
 let USERS = [];
 let COURSES = [];
+let PURCHASED_COURSES = [];
+
+function checkIfAdmin(req) {
+    const adminCreds = {
+      username : req.headers.username,
+      password : req.headers.password
+    };
+    const checkUsername = ADMINS.find((currVal) => {
+      return (currVal.username === adminCreds.username && currVal.password === adminCreds.password);
+    });
+    return checkUsername;
+}
+
+//- POST /admin/signup
+//   Description: Creates a new admin account.
+//   Input: { username: 'admin', password: 'pass' }
+//   Output: { message: 'Admin created successfully' }
 
 // Admin routes
 app.post('/admin/signup', (req, res) => {
-  // logic to sign up admin
+     const newAdmin = { 
+      username: req.headers.username, 
+      password: req.headers.password 
+    };
+    ADMINS.push(newAdmin);
+    res.send(201);
 });
 
-app.post('/admin/login', (req, res) => {
-  // logic to log in admin
+// - POST /admin/login
+//    Description: Authenticates an admin. It requires the admin to send username and password in the headers.
+//    Input: Headers: { 'username': 'admin', 'password': 'pass' }
+//    Output: { message: 'Logged in successfully' }
+
+app.post('/admin/login', (req, res) => {   
+    const checkCreds = checkIfAdmin(req);
+    console.log(checkCreds);
+    if(!checkCreds) {
+      res.send(404);
+    }
+    else {
+      res.json( { message: 'Logged in successfully' } );
+    }
 });
 
+// - POST /admin/courses
+// Description: Creates a new course.
+// Input: Headers: { 'username': 'admin', 'password': 'pass' }
+// Input: Body: { title: 'course title', description: 'course description', price: 100, imageLink: 'https://linktoimage.com', published: true }
+// Output: { message: 'Course created successfully', courseId: 1 }
+
 app.post('/admin/courses', (req, res) => {
-  // logic to create a course
+    const checkCreds = checkIfAdmin(req);
+    if(!checkCreds) {
+      res.send(401);
+    }
+    const newCourse = { 
+      id : Math.floor(Math.random() * 1000000),
+      title: req.body.title, 
+      description: req.body.description,
+      price: req.body.price, 
+      imageLink: req.body.imageLink, 
+      published: req.body.published 
+    };
+    COURSES.push(newCourse);
+    res.json( { message: 'Course created successfully', courseId: newCourse.id } );
 });
 
+// - PUT /admin/courses/:courseId
+//    Description: Edits an existing course. courseId in the URL path should be replaced with the ID of the course to be edited.
+//    Input: Headers: { 'username': 'admin', 'password': 'pass' }
+//    Input: Body { title: 'updated course title', description: 'updated course description', price: 100, imageLink: 'https://updatedlinktoimage.com', published: false }
+//    Output: { message: 'Course updated successfully' }
+
 app.put('/admin/courses/:courseId', (req, res) => {
-  // logic to edit a course
+    // const checkCreds = checkIfAdmin(req);
+    // if(!checkCreds) {
+    //   res.send(401);
+    // }
+    var Id = parseInt(req.params.courseId);
+    const checkIfCourseExist = COURSES.find((currVal) => {
+      return (currVal.id === Id);
+    });
+    console.log(checkIfCourseExist);
+    if(checkIfCourseExist === undefined) {
+      res.send(404);
+    }
+    else {
+      for (let course of COURSES) {
+        if (course.id === Id) {
+            course.title = req.body.title, 
+            course.description = req.body.description,
+            course.price = req.body.price, 
+            course.imageLink = req.body.imageLink, 
+            course.published = req.body.published
+        }
+      }
+      res.json({ message: 'Course updated successfully' });
+    }
 });
 
+// - GET /admin/courses
+//    Description: Returns all the courses.
+//    Input: Headers: { 'username': 'admin', 'password': 'pass' }
+//    Output: { courses: [ { id: 1, title: 'course title', description: 'course description', price: 100, imageLink: 'https://linktoimage.com', published: true }, ... ] }
+
 app.get('/admin/courses', (req, res) => {
-  // logic to get all courses
+    const checkCreds = checkIfAdmin(req);
+    if(!checkCreds) {
+      res.send(401);
+    }
+    else {
+      res.json(COURSES);
+    }
+});
+
+app.get('/admin/alladmin', (req, res) => {
+    res.json(ADMINS);
 });
 
 // User routes
+
+// - POST /users/signup
+// Description: Creates a new user account.
+// Input: { username: 'user', password: 'pass' }
+// Output: { message: 'User created successfully' } 
+
 app.post('/users/signup', (req, res) => {
-  // logic to sign up user
+    const userCreds = {
+      username: req.headers.username, 
+      password: req.headers.password
+    };
+    const alreadyExist = USERS.find((currVal) => {
+      return (currVal.username === userCreds.username);
+    });
+
+    if(alreadyExist) {
+      res.json({ message : 'User already exist' });
+    }
+    else {
+      USERS.push(userCreds);
+      res.json({ message: 'User created successfully'});
+    }
 });
 
+// - POST /users/login
+//    Description: Authenticates a user. It requires the user to send username and password in the headers.
+//    Input: Headers: { 'username': 'user', 'password': 'pass' }
+//    Output: { message: 'Logged in successfully' }
+
 app.post('/users/login', (req, res) => {
-  // logic to log in user
+    const userCreds = {
+      username: req.headers.username, 
+      password: req.headers.password
+    };
+    const isExist = USERS.find((currVal) => {
+      return (currVal.username === userCreds.username && currVal.password === userCreds.password);
+    });
+
+    if(!isExist) {
+      res.json({ message : 'Authorization failed.' });
+    }
+    else {
+      res.json({message : 'Logged in successfully'});
+    }
 });
 
+// GET /users/courses
+//    Description: Lists all the courses.
+//    Input: Headers: { 'username': 'admin', 'password': 'pass' }
+//    Output: { courses: [ { id: 1, title: 'course title', description: 'course description', price: 100, imageLink: 'https://linktoimage.com', published: true }, ... ] }
+
 app.get('/users/courses', (req, res) => {
-  // logic to list all courses
+    res.json( COURSES );
 });
 
+// - POST /users/courses/:courseId
+//    Description: Purchases a course. courseId in the URL path should be replaced with the ID of the course to be purchased.
+//    Input: Headers: { 'username': 'admin', 'password': 'pass' }
+//    Output: { message: 'Course purchased successfully' }
+
 app.post('/users/courses/:courseId', (req, res) => {
-  // logic to purchase a course
+    const courseToPurchase = COURSES.findIndex( (currValue) => {
+        return (currValue.id === req.params.courseId);
+    });
+    if(courseToPurchase === -1) {
+       res.send(404);
+    }
+    else {
+      PURCHASED_COURSES.push(COURSES[index]);
+      res.json( { message: 'Course purchased successfully' } );
+    }
 });
 
+// - GET /users/purchasedCourses
+//    Description: Lists all the courses purchased by the user.
+//    Input: Headers: { 'username': 'admin', 'password': 'pass' }
+//    Output: { purchasedCourses: [ { id: 1, title: 'course title', description: 'course description', price: 100, imageLink: 'https://linktoimage.com', published: true }, ... ] }
+
 app.get('/users/purchasedCourses', (req, res) => {
-  // logic to view purchased courses
+    res.json(PURCHASED_COURSES);
 });
 
 app.listen(3000, () => {
   console.log('Server is listening on port 3000');
-});
+});
diff --git a/week-3/02-course-app-easy/node_modules/.bin/mime b/week-3/02-course-app-easy/node_modules/.bin/mime
diff --git a/week-3/02-course-app-easy/node_modules/.bin/mime.cmd b/week-3/02-course-app-easy/node_modules/.bin/mime.cmd