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server.js
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server.js
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const express = require('express');
const jwt = require('jsonwebtoken');
const app = express();
const cors = require('cors');
app.use(express.json());
app.use(cors());
let ADMINS = [];
let USERS = [];
let COURSES = [];
const secretKey = "superS3cr3t1"; // replace this with your own secret key
const generateJwt = (user) => {
const payload = { username: user.username, };
return jwt.sign(payload, secretKey, { expiresIn: '1h' });
};
const authenticateJwt = (req, res, next) => {
const authHeader = req.headers.authorization;
if (authHeader) {
const token = authHeader.split(' ')[1];
jwt.verify(token, secretKey, (err, user) => {
if (err) {
return res.sendStatus(403);
}
req.user = user;
next();
});
} else {
res.sendStatus(401);
}
};
app.get('/admin/me' , authenticateJwt , (req,res)=>{
res.json({
username : req.user.username
})
})
app.post('/admin/signup', (req, res) => {
const admin = req.body;
const existingAdmin = ADMINS.find(a => a.username === admin.username);
if (existingAdmin) {
res.status(403).json({ message: 'Admin already exists' });
} else {
ADMINS.push(admin);
const token = generateJwt(admin);
res.json({ message: 'Admin created successfully', token });
}
});
app.post('/admin/login', (req, res) => {
const { username, password } = req.headers;
const admin = ADMINS.find(a => a.username === username && a.password === password);
if (admin) {
const token = generateJwt(admin);
res.json({ message: 'Logged in successfully', token });
} else {
res.status(403).json({ message: 'Admin authentication failed' });
}
});
app.post('/admin/courses', authenticateJwt, (req, res) => {
const course = req.body;
course.id = COURSES.length + 1;
COURSES.push(course);
res.json({ message: 'Course created successfully', courseId: course.id });
});
app.put('/admin/courses/:courseId', authenticateJwt, (req, res) => {
const courseId = parseInt(req.params.courseId);
const courseIndex = COURSES.findIndex(c => c.id === courseId);
if (courseIndex > -1) {
const updatedCourse = { ...COURSES[courseIndex], ...req.body };
COURSES[courseIndex] = updatedCourse;
res.json({ message: 'Course updated successfully' });
} else {
res.status(404).json({ message: 'Course not found' });
}
});
app.get('/admin/courses', authenticateJwt, (req, res) => {
res.json({ courses: COURSES });
});
app.post('/users/signup', (req, res) => {
const user = req.body;
const existingUser = USERS.find(u => u.username === user.username);
if (existingUser) {
res.status(403).json({ message: 'User already exists' });
} else {
USERS.push(user);
const token = generateJwt(user);
res.json({ message: 'User created successfully', token });
}
});
app.post('/users/login', (req, res) => {
const { username, password } = req.headers;
const user = USERS.find(u => u.username === username && u.password === password);
if (user) {
const token = generateJwt(user);
res.json({ message: 'Logged in successfully', token });
} else {
res.status(403).json({ message: 'User authentication failed' });
}
});
app.get('/users/courses', authenticateJwt, (req, res) => {
res.json({ courses: COURSES });
});
app.post('/users/courses/:courseId', authenticateJwt, (req, res) => {
const courseId = parseInt(req.params.courseId);
const course = COURSES.find(c => c.id === courseId);
if (course) {
const user = USERS.find(u => u.username === req.user.username);
if (user) {
if (!user.purchasedCourses) {
user.purchasedCourses = [];
}
user.purchasedCourses.push(course);
res.json({ message: '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', authenticateJwt, (req, res) => {
const user = USERS.find(u => u.username === req.user.username);
if (user && user.purchasedCourses) {
res.json({ purchasedCourses: user.purchasedCourses });
} else {
res.status(404).json({ message: 'No courses purchased' });
}
});
app.listen(3000, () => {
console.log('Server is listening on port 3000');
});