app.js

const express = require('express');
const bodyParser = require('body-parser');
const mongoose = require('mongoose');
const Recipe = require('./models/recipe');

const app = express();

app.use((req, res, next) => {
    res.setHeader('Access-Control-Allow-Origin', '*');
    res.setHeader('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content, Accept, Content-Type, Authorization');
    res.setHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, PATCH, OPTIONS');
    next();
});

mongoose.connect('mongodb+srv://mongodb:AK8h9DXyXbzk7QhX@cluster0-hdl9n.mongodb.net/test?retryWrites=true&w=majority')
    .then(() => {
        console.log('Connected to MongoDB Atlas');
    })
    .catch((error) => {
        console.log('Unable to connect to MongoDB atlas');
        console.error(error);
    });

app.use(bodyParser.json());

app.post('/api/recipes', (req, res, next) => {
    const recipe = new Recipe({
        title: req.body.title,
        ingredients: req.body.ingredients,
        instructions: req.body.instructions,
        difficulty: req.body.difficulty,
        time: req.body.time,
    });
    recipe.save().then(
        () => {
            res.status(201).json({
                message: 'recipe posted successfully'
            });
        }
    ).catch(
        (error) => {
            res.status(400).json({
                error: error
            });
        }
    );
});

app.get('/api/recipes/:id', (req, res, next) => {
    Recipe.findOne({
        _id: req.params.id
    }).then(
        (recipe) => {
            res.status(200).json(recipe)
        }
    ).catch(
        (error) => {
            res.status(404).json({
                error: error
            });
        }
    );
});

app.put('/api/recipes/:id', (req, res, next) => {
    const recipe = new Recipe({
        _id: req.params.id,
        title: req.body.title,
        ingredients: req.body.ingredients,
        instruction: req.body.instruction,
        difficulty: req.body.difficulty,
        time: req.body.time
    });
    Recipe.updateOne({ _id: req.params.id }, recipe).then(
        () => {
            res.status(201).json({
                message: 'recipe updated successfully'
            });
        }
    ).catch(
        (error) => {
            res.status(400).json({
                error: error
            });
        }
    );
});

app.delete('/api/recipes/:id', (req, res, next) => {
    Recipe.deleteOne({ _id: req.params.id }).then(
        () => {
            res.status(201).json({
                message: 'deleted'
            });
        }
    ).catch(
        (error) => {
            res.status(400).json({
                error: error
            });
        }
    );
});


app.use('/api/recipes', (req, res, next) => {
    Recipe.find().then(
        (recipe) => {
            res.status(201).json(recipe);
        }
    ).catch(
        (error) => {
            res.status(400).json({
                error: error
            });
        }
    );
});

module.exports = app;