10_express_mongoose.js

const User2 = require('./10_mongoose_model')
const express = require('express')

const app = express()
const port = process.env.PORT || 3000

app.use(express.json())

app.post('/users', (req, res) => {
    const user = new User2(req.body)

    user.save().then(() => {
        res.send(user) //or res.status(201).send(user) --> post sends 201 if successful 
    }).catch((e) => {
        res.status(400).send(e)
    })
})

app.listen(port, () => {
    console.log('Server is up on port ' + port)
})




app.get('/users', (req, res) => {
    User2.find({}).then((users) => {
        res.send(users)
    }).catch((e) => {
        res.status(500).send()
    })
})

app.get('/users/:id', async (req, res) => {
    const _id = req.params.id

    const user = await User2.findById(_id);

        if (!user) {
            return res.status(404).send()
        }

        res.status(202).send(user)

})


app.patch('/users/:id', async (req, res) => {
    const updates = Object.keys(req.body)
    const allowedUpdates = ['name', 'email', 'password', 'age']
    const isValidOperation = updates.every((update) => allowedUpdates.includes(update))

    if (!isValidOperation) {
        return res.status(400).send({ error: 'Invalid updates!' })
    }

    try {
        const user = await User2.findByIdAndUpdate(req.params.id, req.body, { new: true, runValidators: true })
    
        if (!user) {
            return res.status(404).send()
        }

        res.send(user)
    } catch (e) {
        res.status(400).send(e)
    }
})


app.delete('/users/:id', async (req, res) => {
    try {
        const user = await User2.findByIdAndDelete(req.params.id)

        if (!user) {
            return res.status(404).send()
        }

        res.send(user)
    } catch (e) {
        res.status(500).send()
    }
})