index.js

// required packages
require("dotenv").config();
const express = require("express");
const methodOverride = require("method-override");
const cookieParser = require("cookie-parser");
const db = require("./models");
const crypto = require("crypto-js");
const axios = require("axios");
const API_KEY = process.env.API_KEY;
const OTHER_KEY = process.env.OTHER_KEY;
// app config
const app = express();
app.use(methodOverride("_method"));
const PORT = process.env.PORT || 8000;
app.set("view engine", "ejs");
// parse request bodies from html forms
app.use(express.urlencoded({ extended: false }));
// tell express to parse incoming cookies
app.use(cookieParser());
// custom auth middleware that checks the cookies for a user id
// and it finds one, look up the user in the db
// tell all downstream routes about this user
app.use(async (req, res, next) => {
  try {
    if (req.cookies.userId) {
      // decrypt the user id and turn it into a string
      const decryptedId = crypto.AES.decrypt(
        req.cookies.userId,
        process.env.SECRET
      );
      const decryptedString = decryptedId.toString(crypto.enc.Utf8);
      // the user is logged in, lets find them in the db
      const user = await db.user.findByPk(decryptedString);
      // mount the logged in user on the res.locals
      res.locals.user = user;
    } else {
      // set the logged in user to be null for conditional rendering
      res.locals.user = null;
    }

    // move on the the next middleware/route
    next();
  } catch (err) {
    // explicity set user to null if there is an error
    res.locals.user = null;
    next(); // go to the next thing
  }
});

// routes and controllers
app.get("/", async function (req, res) {
  try {
    const search = await axios.get(
      `https://api.musixmatch.com/ws/1.1/chart.tracks.get?chart_name=mxmweekly&page=1&page_size=15&f_has_lyrics=1&apikey=${API_KEY}`
    );
    let findPubPlaylist = await db.playlist.findAll({
      where: {
        status: true,
      },
      include: {
        model: db.user,
      },
    });
    let topFive;
    let countTrack = [];
    if (findPubPlaylist.length > 5) {
      for (let i in findPubPlaylist) {
        const count = await db.activity.findAll({
          where: {
            playlistId: findPubPlaylist[i].id,
          },
        });
        let track = count.length;
        let id = findPubPlaylist[i];
        countTrack.push({
          count: track,
          playlistId: id,
        });
      }
      topFive = countTrack.sort((p1, p2) =>
        p1.count < p2.count ? 1 : p1.count > p2.count ? -1 : 0
      );
      findPubPlaylist = topFive;
    }
    res.render("home.ejs", {
      user: res.locals.user,
      publicPlaylists: findPubPlaylist,
      popSongs: search.data.message.body.track_list,
    });
  } catch (error) {
    res.send("error in main page" + error);
  }
});

app.use("/users", require("./controllers/users"));
app.use("/playlists", require("./controllers/playlists"));
app.use("/search", require("./controllers/search"));
const path = require("path");
app.use(express.static(path.join(__dirname, "public")));

app.get("*", function (req, res) {
  // res.sendFile(__dirname + 'error.ejs')
  res.render("error.ejs");
});
// listen on a port
app.listen(PORT, () => {
  console.log(`authenticating users on PORT ${PORT} 🔐`);
});