index.js

const express = require("express");
const app = express();
const mongoose = require("mongoose");
const path = require("path");
const Chat = require("./models/Chat");
const methodOverride = require("method-override");

app.set("views", path.join(__dirname, "views"));
app.set("view engine", "ejs");
app.use(express.static(path.join(__dirname, "public")));
app.use(express.urlencoded({extended: true}));
app.use(methodOverride("_method"));

main()
.then(() => 
    {console.log("connection successful");
    }).catch(err => console.log(err));
async function main(){
    await mongoose.connect('mongodb://127.0.0.1:27017/chatapp')
}

//index route
app.get("/chats", async (req, res)=>{
    let chats = await Chat.find();
    console.log(chats);
    res.render("index.ejs", {chats});

});

//new route
app.get("/chats/new", (req, res)=> {
    res.render("new.ejs");
})

//create route
app.post("/chats", (req, res)=> {
    let {from, to, msg} = req.body;
    let newChat = new Chat({
        from: from,
        msg: msg, 
        to: to,
        created_at: new Date()
    });
    newChat.save()
    .then(()=> {console.log("chat saved")})
    .catch((err)=> console.log(err));
    res.redirect("/chats");
});

//edit route
app.get("/chats/:id/edit", async (req,res)=>{
    let {id} = req.params;
    let chat = await Chat.findById(id);
    res.render("edit.ejs", {chat});
});

//update route
app.put("/chats/:id", async (req, res)=> {
    let {id} = req.params;
    let {msg: newMsg} = req.body;
    let updatedChat = await Chat.findByIdAndUpdate(id, 
        {msg: newMsg},
        {runValidators: true}, {new: true}
    );
    console.log("updatedChat");
    res.redirect("/chats");
});

//destroy route
app.delete("/chats/:id", async (req,res)=> {
    let {id} = req.params;
    let toDelete = await Chat.findByIdAndDelete(id);
    console.log(toDelete);
    res.redirect("/chats");
})

app.get("/", (req, res)=> {
    res.send("root is working");
});

app.listen(8080, ()=>{
    console.log("app is listening.")
});