heroku_invoice_to_csv.js

var $apps = $(".app");

var costTable = function(csv, year, month, appName, $app, type) {
    console.log(csv, appName, $app, type);
    var $dynos = $app.find("." + type + " tbody tr");
    for (var j = 0; j < $dynos.length; j++) {
        var $dyno = $($dynos.get(j));
        var $fields = $dyno.find("td");

        if ($fields.length != 4) {
            continue;
        }

        var name = $($fields[0]).text().replace(/[\n,]/g, "").replace(/^ +/, "").replace(/ +$/, "");
        var hours = $($fields[1]).text().replace(/[\n,]/g, "").replace(/^ +/, "").replace(/ +$/, "");
        var rate = $($fields[2]).text().replace(/[\n,]/g, "").replace(/^ +/, "").replace(/ +$/, "");
        var cost = $($fields[3]).text().replace(/[\n,]/g, "").replace(/^ +/, "").replace(/ +$/, "");

        csv += [ year, month, appName, type, name, hours, rate, cost ].join();
        csv += "\n";
    }

    return csv;
}

var csv = "data:text/csv;charset=utf-8,"
csv += "year,month,app,type,name,hours,rate,cost\n";

var components = document.location.href.split("/");
var year = components[components.length - 2];
var month = components[components.length - 1];

for (var i = 0; i < $apps.length; i++) {
    var $app = $($apps.get(i));
    var title = $app.find(".app-title .title").text();

    csv = costTable(csv, year, month, title, $app, "dynos");
    csv = costTable(csv, year, month, title, $app, "addons");

    console.log(csv)
}

var encodedUri = encodeURI(csv);
var link = document.createElement("a");
link.setAttribute("href", encodedUri);
link.setAttribute("download", "" + year + "0" + month + "invoice.csv");
link.click();