GPT

Express.js API Implementation

const express = require('express') const cors = require('cors') const userModel = require('./models/user') const postModel = require('./models/post') const app = express() app.use(cors()) app.use(express.json()) // Use

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const express = require('express')
const cors = require('cors')
const userModel = require('./models/user')
const postModel = require('./models/post')

const app = express()
app.use(cors())
app.use(express.json())

// User routes
app.get('/api/users', async (req, res) => {
 try {
 const users = await userModel.getUsers()
 res.json(users)
 } catch (error) {
 res.status(500).json({ error: 'Failed to fetch users' })
 }
})

app.get('/api/users/:id', async (req, res) => {
 try {
 const user = await userModel.getUserById(parseInt(req.params.id))
 if (!user) {
 return res.status(404).json({ error: 'User not found' })
 }
 res.json(user)
 } catch (error) {
 res.status(500).json({ error: `Failed to fetch user ${req.params.id}` })
 }
})

app.post('/api/users', async (req, res) => {
 try {
 const user = await userModel.createUser(req.body)
 res.status(201).json(user)
 } catch (error) {
 res.status(500).json({ error: 'Failed to create user' })
 }
})

app.put('/api/users/:id', async (req, res) => {
 try {
 const user = await userModel.updateUser(parseInt(req.params.id), req.body)
 res.json(user)
 } catch (error) {
 res.status(500).json({ error: `Failed to update user ${req.params.id}` })
 }
})

app.delete('/api/users/:id', async (req, res) => {
 try {
 await userModel.deleteUser(parseInt(req.params.id))
 res.status(204).end()
 } catch (error) {
 res.status(500).json({ error: `Failed to delete user ${req.params.id}` })
 }
})

// Post routes
app.get('/api/posts', async (req, res) => {
 try {
 const posts = await postModel.getPosts()
 res.json(posts)
 } catch (error) {
 res.status(500).json({ error: 'Failed to fetch posts' })
 }
})

app.get('/api/posts/:id', async (req, res) => {
 try {
 const post = await postModel.getPostById(parseInt(req.params.id))
 if (!post) {
 return res.status(404).json({ error: 'Post not found' })
 }
 res.json(post)
 } catch (error) {
 res.status(500).json({ error: `Failed to fetch post ${req.params.id}` })
 }
})

app.post('/api/posts', async (req, res) => {
 try {
 const post = await postModel.createPost(req.body)
 res.status(201).json(post)
 } catch (error) {
 res.status(500).json({ error: 'Failed to create post' })
 }
})

app.put('/api/posts/:id', async (req, res) => {
 try {
 const post = await postModel.updatePost(parseInt(req.params.id), req.body)
 res.json(post)
 } catch (error) {
 res.status(500).json({ error: `Failed to update post ${req.params.id}` })
 }
})

app.delete('/api/posts/:id', async (req, res) => {
 try {
 await postModel.deletePost(parseInt(req.params.id))
 res.status(204).end()
 } catch (error) {
 res.status(500).json({ error: `Failed to delete post ${req.params.id}` })
 }
})

const PORT = process.env.PORT || 3000
app.listen(PORT, () => {
 console.log(`Server running on port ${PORT}`)
})

Source & attribution

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