TUTORIAL#8 SERVER

//Create express app
const express = require('express');
let app = express();

//Database variables
let mongo = require('mongodb');
let MongoClient = mongo.MongoClient;
let db;
//View engine
app.set("view engine", "pug");

//Set up the routes
app.use(express.static("views"));
app.get("/", sendIndex);
app.get("/cards/:cardID", sendCard);
app.post("/cards",parseCards);

function sendIndex(req, res, next){
    db.collection("cards").distinct("cardClass",function(err1,value1){
        db.collection("cards").distinct("rarity",function(err2,value2){
            if(err1) throw err1;
            if(err2) throw err2;
            res.render("index",{cardClasses: value1, rarity: value2});
        });
    });
}

function sendCard(req, res, next){
    let oid;
    try{
        oid = new mongo.ObjectID(req.params.cardID);
    }catch{
        res.status(404).send("Unknown ID");
        return;
    }

    db.collection("cards").findOne({"_id":oid}, function(err, result){
        if(err){
            res.status(500).send("Error reading database.");
            return;
        }
        if(!result){
            res.status(404).send("Unknown ID");
            return;
        }
        res.status(200);
        res.format({
            "text/html": () => {res.render("card", result);},
            "application/json": () => {res.send(cards[cardID]);}
        });
    });
}

function parseCards(req,res,next){
    console.log("PARSING REQUEST");
    db.collection("cards").find(req.query).toArray(function(err,result){
        if(err){res.status(500); return;};
        res.send({info: result});
    });
}


// Initialize database connection
MongoClient.connect("mongodb://localhost:27017/", function(err, client) {
  if(err) throw err;

  //Get the t8 database
  db = client.db('t8');
  // Start server once Mongo is initialized
  app.listen(3000);
  console.log("Listening on port 3000");
});