node rest api

const express = require('express');
const mongoose = require('mongoose');
const bodyParser = require('body-Parser');
const ejs = require('ejs');
const app = express();

app.set('view engine', 'ejs');
app.use(express.static("public"));

app.use(bodyParser.urlencoded({
    extended: true
}));


mongoose.connect("mongodb://localhost:27017/wikkiDB",
    { useNewUrlParser: true, useUnifiedTopology: true });

const articlesSchema = {
    title: {
        type: String,
        required: true
    },
    content: {
        type: String,
        required: true
    },
};


const Article = mongoose.model('articles', articlesSchema);

// app.get('/article', function (req, res) {

//     Article.find({}, function (err, articleList) {
//         if (!err) {
//             res.send(articleList);
//         }
//         else {
//             res.send(err);
//         }
//     });
// });

// app.get('/article/:articleTitle', function (req, res) {
//     Article.findOne({ title: req.params.articleTitle }, function (err, article) {
//         if (!err) {
//             res.send(article);
//         }
//         else {
//             res.send(err);
//         }


//     })

// });

app.route('/article').get(function (req, res) {
    Article.find({}, function (err, articleList) {
        if (!err) {
            res.send(articleList);
        }
        else {

            res.send(err);
        }
    });
});

app.route('/articles').post(function (req, res) {

    const article = new Article({
        title: req.body.titles,
        content: req.body.contents
    });
    console.log(req.params.titles);
    console.log(article);
    article.save(function (err) {
        if (!err) {
            res.send("succesfully added item");
        }
        else {
            //console.log('/////');
            //console.log(err);
            res.send(err.message);
        }

    });
});

app.route('/delete').delete(function (req, res) {
    Article.deleteMany({}, function (err,) {
        if (!err) {

            res.send("succcesfully delete all articles");
        }
        else {
            res.send(err.message);
        }
    });
});



app.route('/article/:articleTitle').get(function (req, res) {
    Article.findOne({ title: req.params.articleTitle }, function (err, article) {
        if (article) {
            res.send(article);
        }
        else {
            res.send("there is no article with this  " + req.params.articleTitle);
        }
    });
});
app.route('/article/:articleTitle').put(function (req, res) {

    const articleTitle = req.params.articleTitle;

    Article.update({ title: req.params.articleTitle },
        { title: req.body.titles, content: req.body.contents },
        { overwrite: true },
        function (err) {
            if (!err) {
                res.send("Sucessfully added");
            }
            else {
                res.send(err.message);
            }
        }
    );
}).patch(function (req, res) {
    Article.update({ title: req.params.articleTitle }, { $set: req.body },
        function (err) {
            if (!err) {
                console.log(req.body);
                res.send("Sucessfully added");
            }
            else {
                res.send(err.message);
            }
        }
    );
}).delete(function (req, res) {

    Article.deleteOne({ title: req.params.articleTitle }, function (err) {
        if (!err) {
            res.send("successfully deleted "+ req.params.articleTitle);
        }
else{
    res.send(err.message);
}


    });


});



app.listen(3000, function () {
    console.log("server is working");
});