app.js

const express = require("express");
//const ejs = require("ejs");
const mongoose = require('mongoose');

const app = express();

//app.set("view engine", "ejs");

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

//app.use(express.static("public"));

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

const articleSchema = { title: String, content: String };
const Article = mongoose.model("Article", articleSchema);

//TODO
app.route("/articles")
    .get(
        function (req, res) {
            Article.find(function (err, foundArticles) {
                if (!err) res.send(foundArticles);
                else res.send(err);
            });
        }
    )
    .post(
        function (req, res) {
            const newArticle = new Article({
                title: req.body.title,
                content: req.body.content
            });
            newArticle.save(function (err) {
                if (!err) res.send("Added the new article!");
                else res.send(err);
            });
        }
    )
    .delete(
        function (req, res) {
            Article.deleteMany(function (err) {
                if (!err) res.send("Deleted all articles");
                else res.send(err);
            });
        }
    );

app.route("/articles/:articleTitle")
    .get(
        function(req,res){
            Article.findOne({title:req.params.articleTitle},function(err, foundArticle){
                if(!err){
                    if(foundArticle)res.send(foundArticle);
                    else res.send("Not found.");
                }else{
                    console.log(err);
                }
            });
        }
    )
    .put(
        function(req,res){
            Article.updateOne({title:req.params.articleTitle},{title:req.body.title,content:req.body.content},function(err){
                if(!err)res.send("Putted");
                else res.send(err);
            });
        }
    )
    .patch(
        function(req,res){
            Article.updateOne({title:req.params.articleTitle},{$set:req.body},function(err){
                if(!err)res.send("Patched");
                else res.send(err);
            });
        }
    )
    .delete(
        function(req,res){
            Article.deleteOne({title:req.params.articleTitle},function(err){
                if(!err)res.send("Deleted");
                else res.send(err);
            });
        }
    ); 


app.listen(3000, function () {
    console.log("Server started on port 3000");
});