done course-app-easy

week-3/02-course-app-easy/.gitignore

@@ -0,0 +1 @@
+node_modules

week-3/02-course-app-easy/index.js

@@ -7,46 +7,108 @@ let ADMINS = [];
 let USERS = [];
 let COURSES = [];
 
+const adminAuthentication = (req,res,next)=>{
+  //check if admin exist in admin array if yes call next
+  const admin = req.headers;
+  const validAdmin = ADMINS.find(a=>a.username===admin.username
+    &&a.password === admin.password  );
+  if(validAdmin){
+    next();
+  }else{
+    res.status(403).json({message:'Admin authentication failed'})
+  }
+}
+const userAuthentication = (req,res,next)=>{
+  //check if admin exist in admin array if yes call next
+  const user = req.headers;
+  const validUser = USERS.find(u=>u.username===user.username
+    &&u.password === user.password  );
+  if(validUser){
+    // adding user object to req body because a user has purchased course in USERS array
+    req.user = validUser;
+    next();
+  }else{
+    res.status(403).json({message:'User Authentication failed'});
+  }
+}
 // Admin routes
 app.post('/admin/signup', (req, res) => {
-  // logic to sign up admin
+  const admin = req.body;
+  const existingAdmin = ADMINS.find(a=>a.username === admin.username
+    && a.password ===admin.password );
+  if(existingAdmin) 
+    res.status(404).json({message: 'Admin already exist'});
+  else{
+    ADMINS.push(admin);
+    res.json({message: 'Admin created successfully'})
+  }
 });
 
-app.post('/admin/login', (req, res) => {
-  // logic to log in admin
+app.post('/admin/login',adminAuthentication, (req, res) => {
+  console.log(req.headers);
+  res.json({message: 'Logged in successfully'});
 });
 
-app.post('/admin/courses', (req, res) => {
-  // logic to create a course
+app.post('/admin/courses',adminAuthentication, (req, res) => {
+  const course = req.body;
+  course.id = Date.now();
+  COURSES.push(course);
+  res.json({ message: 'Course created successfully', courseId: 1 })
 });
 
-app.put('/admin/courses/:courseId', (req, res) => {
-  // logic to edit a course
+app.put('/admin/courses/:courseId',adminAuthentication, (req, res) => {
+  const courseId = parseInt(req.params.courseId);
+  const course = COURSES.find(c=>c.id ===courseId);
+  if(course){
+    Object.assign(course,req.body);
+    res.json({message: 'Course updated successfully'});
+  }else{
+    res.status(403).json({message:'Course not found'});
+  }
 });
 
-app.get('/admin/courses', (req, res) => {
-  // logic to get all courses
+app.get('/admin/courses',adminAuthentication, (req, res) => {
+  res.json({courses: COURSES});
 });
 
 // User routes
 app.post('/users/signup', (req, res) => {
-  // logic to sign up user
+  const user = {...req.body,purchasedCourse: []};
+  const existingUser = USERS.find(u=>u.username === user.username
+    && u.password ===user.password );
+  if(existingUser) 
+    res.status(404).json({message: 'User already exist'});
+  else{
+    USERS.push(user);
+    res.json({message: 'User created successfully'})
+  }
 });
 
-app.post('/users/login', (req, res) => {
-  // logic to log in user
+app.post('/users/login',userAuthentication, (req, res) => {
+  res.json({ message: 'Logged in successfully' });
 });
 
-app.get('/users/courses', (req, res) => {
-  // logic to list all courses
+app.get('/users/courses',userAuthentication, (req, res) => {
+  let filteredCourses = COURSES.filter(c => c.published) ;
+  res.json({course: filteredCourses});
 });
 
-app.post('/users/courses/:courseId', (req, res) => {
-  // logic to purchase a course
+app.post('/users/courses/:courseId',userAuthentication, (req, res) => {
+  const courseId = parseInt(req.params.courseId);
+  const course = COURSES.find(c=>c.id === courseId &&c.published);
+  if(course){
+    req.user.purchasedCourse.push(course);
+  res.json({message:'Course purchased successfully'})
+  }else{
+    res.status(404).json({ message: 'Course not found or not available' });
+  }
 });
 
-app.get('/users/purchasedCourses', (req, res) => {
-  // logic to view purchased courses
+app.get('/users/purchasedCourses',userAuthentication, (req, res) => {
+  // const user = USERS.find(u=>u.username === req.user.username);
+  // res.json({purchasedCourses:req.user.purchasedCourse});
+  const purchasedCourses = COURSES.filter(c=>req.user.purchasedCourses.includes(c.id));
+  res.json({ purchasedCourses });
 });
 
 app.listen(3000, () => {