express-backup

const express=require('express')
const app=express()
//configuration- enable express to parse incoming json data
app.use(express.json())
const port=6002
const customers=[
    {id:1,name:'lasya'},
    {id:2,name:'krishna'}
]
//request handlers
//syntax: app.httpmethod(url,callback)
app.get('/',(req,res)=>{
    res.send('welcome to website')
    
})
app.get('/customers',(req,res)=>{
    res.json(customers)
})
//finding customer based on id
app.get('/customers/:id',(req,res)=>{
    const id=req.params.id
    const customer=customers.find(customer =>customer.id==id)
    if(customer){
        res.json(customer)
    }
    else{
        res.json({})
    }
})
//post create
app.post('/customers',(req,res)=>{
    const body=req.body
    res.json(body)
})
//put
app.put('/customers/:id',(req,res)=>{
    const id=req.params.id
    res.send(` id updated`)
})
//delete
app.delete('/customers/:id',(req,res)=>{
    const id=req.params.id
    res.send(` deleted `)
})
app.listen(port,()=>{
    console.log('server running on port',port)
})