toDoSuper.js

var express = require('express');

var app = express();
var handlebars = require('express-handlebars').create({defaultLayout:'main'});
var bodyParser = require('body-parser');
var session = require('express-session');
var request = require('request');

app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
app.use(session({secret:'SuperSecretPasscode'}));

app.engine('handlebars', handlebars.engine);
app.set('view engine', 'handlebars');
app.set('port', 3000);

function getTemp(context, callback){
	var responseCount = context.toDoCount;
	var timeoutCount = 0;
	for (var task in context.toDo){
		setTimeout(function(){
			console.log('sending request with timeout ' + timeoutCount + ', at ' + new Date().getTime());
			request('http://api.openweathermap.org/data/2.5/weather?q=' + context.toDo[task].city + '&units=imperial&appid=37531e6c34f0f28fb2d989292cb1cabd', function(err, response, body){
				if(!err && response.statusCode < 400){
					var responseData = JSON.parse(body);
					if (parseFloat(responseData.main.temp) >= parseFloat(context.toDo[task].minTemp)){
						context.toDo[task].warmEnough = "green";
					} else {
						context.toDo[task].warmEnough = "red";
					}
				} else {
					console.log(err);
					if (response){
						console.log(response.statusCode);
					}
					context.toDo[task].warmEnough = "unknown";
				}
				responseCount = responseCount - 1;
				if (responseCount == 0){
					callback(context);
				}
			});
		}, 1100 * timeoutCount);
		timeoutCount++;
	}
	if (responseCount == 0){
		callback(context);
	}
}

app.get('/', function(req,res,next){
	var context = {};
	if (!req.session.name){
		res.render('newSession', context);
		return;
	}

	context.name = req.session.name;
	context.toDoCount = req.session.toDo.length || 0;
	context.toDo = req.session.toDo || [];
	console.log(context.toDo);
	getTemp(context, function(context){
		res.render('toDo', context);
	});
});

app.post('/', function(req,res){
	var context = {};

	if(req.body['New List']){
		req.session.name = req.body.name;
		req.session.toDo = [];
		req.session.curId = 0;
	}

	if(!req.session.name){
		res.render('newSession', context);
		return;
	}

	if(req.body['Add Item']){
		req.session.toDo.push({"name":req.body.name, "city":req.body.city, "minTemp":req.body.minTemp, "id":req.session.curId, "warmEnough":"not set"});
		req.session.curId++;
	}

	if(req.body['Done']){
		req.session.toDo = req.session.toDo.filter(function(e){
			return e.id != req.body.id;
		})
	}

	context.name = req.session.name;
	context.toDoCount = req.session.toDo.length;
	context.toDo = req.session.toDo;
	console.log(context.toDo);
	getTemp(context, function(context){
		res.render('toDo', context);
	});
});

app.use(function(req,res){
	res.status(404);
	res.render('404');
});

app.use(function(err,req,res,next){
	console.error(err.stack);
	res.status(500);
	res.render('500');
});

app.listen(app.get('port'), function(){
	console.log('Express started on http:localhost:' + app.get('port') + '; press Ctrl-C to terminate.');
});