Node.js RESTFUL api by Win Htut

winhtut node.js restful api

const express=require('express')
const app=express();
const Joi=require('joi')
app.use(express.json())

const courses=[
    {id:1,name:'course1'},
    {id:2,name:'course2'},
    {id:3,name:'course3'},
];
app.get('/',(req,res)=>{
    res.send('Hello World');
})
app.get('/api/courses',(req,res)=>{
    res.send(courses);
})

app.get('/api/courses/:id',(req,res)=>{
    const course=courses.find(c => c.id === parseInt(req.params.id));
    if(!course)res.status(404).send('The course with the given id was not found');
    res.send(course);
})

app.post('/api/course',(req,res)=>{
    const schema={
        name : Joi.string().min(3).required()
    };//schema
    const result=Joi.validate(req.body,schema)
    if(result.error){
        res.status(400).send(result.error.details[0].message);
        return;
    }
    const course={
        id: courses.length+1,
        name: req.body.name
    };
    courses.push(course);
    res.send(course);
})


app.put('/api/courses/:id',(req,res)=>{
    const course=courses.find(c => c.id === parseInt(req.params.id));
    if(!course)res.status(404).send('The course with the given id was not found');

    const schema={
        name : Joi.string().min(3).required()
    };//schema
    const result=Joi.validate(req.body,schema)
    if(result.error){
        res.status(400).send(result.error.details[0].message);
        return;
    }

    course.name=req.body.name;
    res.send(course);

});


app.delete('/api/courses/:id',(req,res)=>{
    const course=courses.find(c => c.id === parseInt(req.params.id));
    if(!course)res.status(404).send('The course with the given id was not found');

    const index=courses.indexOf(course)
    courses.splice(index,1);

})

const port=process.env.PORT || 3000;
app.listen(port,()=>{
    console.log(`A journey is on port ${port}... `)
});