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index.js
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index.js
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const Joi = require('joi');
const express = require('express');
const app = express();
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.post('/api/courses', (req, res) => {
const { error } = validateCourse(req.body);
if (error) return res.status(400).send(error.details[0].message);
const course = {
id: courses.length + 1,
name: req.body.name
};
courses.push(course);
res.send(course);
});
app.put('/api/courses/:id', (req, res) => {
//lookup the courses
const course = courses.find(c => c.id === parseInt(req.params.id));
//If not existing, return (404) error
if (!course)
return res.status(404).send('The course with the given ID was not found');
//const result = validateCourse(req.body);
//object destructuring
const { error } = validateCourse(req.body); //result.error
//validate
/*const schema = {
name: Joi.string().min(3).required()
};
const result = Joi.validate(req.body, schema);
//if invalid, return 400 bad request*/
if (error) return res.status(400).send(error.details[0].message);
//update course
course.name = req.body.name;
//Return the updated course
res.send(course);
});
app.delete('/api/courses/:id', (req, res) => {
//Look up the course
const course = courses.find(c => c.id === parseInt(req.params.id));
//Not existing, return 404
if (!course)
return res.status(404).send('The course with the given ID was not found');
//Delete
const index = courses.indexOf(course);
courses.splice(index, 1);
//Return the same course
res.send(course);
});
//define a function to validate and return course
function validateCourse(course) {
const schema = {
name: Joi.string()
.min(3)
.required()
};
return Joi.validate(course, schema);
}
app.get('/api/courses/:id', (req, res) => {
const course = courses.find(c => c.id === parseInt(req.params.id));
if (!course)
return res.status(404).send('The course with the given ID was not found');
res.send(course);
});
//changed development environment from port 3000
const port = process.env.PORT || 3000;
app.listen(port, () => console.log(`Listening on port ${port}....`));