shoplist/server.js

var DB = require("./js/db");
var express = require("express");
var fs = require("fs");
var WebEvents = require("webevents");

var db = DB("db.json");
var conf = JSON.parse(fs.readFileSync("conf.json"));

var events = WebEvents();

var app = express();
app.use(express.static("web"));
app.listen(conf.port);

app.post("/webevents/*", events.handle);
app.get("/client.js", (req, res) => {
	fs.createReadStream("node_modules/webevents/client.js")
		.pipe(res)
		.on("error", err => res.end(err.toString()));
});

app.get("/list", (req, res) => {
	res.json(db.list);
});

app.get("/words", (req, res) => {
	res.json(db.words);
});

app.post("/remove/:index", (req, res) => {
	res.json({});
	if (!req.params.index)
		return;

	delete db.list[req.params.index];

	events.emit("remove", { index: req.params.index });

	// Clear the entire list array if there are no elements in it
	var containsElems = false;
	for (var i in db.list) {
		if (db.list[i] != null) {
			containsElems = true;
			break;
		}
	}
	if (!containsElems) {
		db.list = [];
	}

	db.flush();
});

app.post("/add/:name", (req, res) => {
	res.json({});
	if (!req.params.name)
		return;

	var name = req.params.name.toLowerCase().trim();

	db.list.push(name);
	events.emit("add", { name: name, index: db.list.length - 1 });

	var word = db.words.filter(w => w.name === name)[0];
	if (word)
		word.count += 1;
	else
		db.words.push({ name: name, count: 1 });

	db.flush();
});

console.log("Server listening on port "+conf.port);