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alesc / PikaCalculator

// ==UserScript==
// @name PikaCalculator
// @namespace https://openuserjs.org/scripts/alesc
// @description Calculates eur from pike on Moja Pika Mercator web page.
// @copyright 2018, alesc (https://openuserjs.org/users/alesc)
// @updateURL https://openuserjs.org/meta/alesc/PikaCalculator.meta.js
// @license MIT
// @include https://www.mercator.si/user/kartice/*
// @version 1.0.4
// @author alesc
// @grant none
// ==/UserScript==

var bonsis  = [];
var myeur   = [];
var sum     = 0;
var today   = new Date();

// Values from: https://www.mercator.si/pika/o-piki/bonitetni-sistem/
bonsis[0] = {pik: 3500, eur: 210};
bonsis[1] = {pik: 1250, eur: 50};
bonsis[2] = {pik: 250,  eur: 5};

// Test values date to days:
//  today = new Date("2017-01-29");     //  2
//  today = new Date("2017-03-29");     //  124
//  today = new Date("2017-12-31");     //  31
//  today = new Date("2017-01-01");     //  30

var firstPeriodStarts   = new Date(today.getFullYear() + "-01-01");     //  2017-01-01 to 2017-01-31
var firstPeriodEnds     = new Date(today.getFullYear() + "-01-31");
var secondPeriodStarts  = new Date(today.getFullYear() + "-02-01");     //  2017-02-01 to 2017-07-31
var secondPeriodEnds    = new Date(today.getFullYear() + "-07-31");
var thirdPeriodStarts   = new Date(today.getFullYear() + "-08-01");     //  2017-08-01 to 2018-01-31
var thirdPeriodEnds     = new Date((today.getFullYear()+1) + "-01-31");
var currentPeriodEnds   = thirdPeriodEnds;

if (firstPeriodStarts <= today && today <= firstPeriodEnds) {
    currentPeriodEnds = firstPeriodEnds;
}
else if (secondPeriodStarts <= today && today <= secondPeriodEnds)
{
    currentPeriodEnds = secondPeriodEnds;
}

// Get piks
var allcells    = document.getElementsByTagName('td');
var origHTML    = allcells[3].innerHTML;
var mypik       = origHTML.split(" ");
mypik[0]        = parseInt(mypik[0], 10);

// Test values pik to eur:
//  mypik[0] = 0;       //  0
//  mypik[0] = 1;       //  0
//  mypik[0] = 251;     //  5
//  mypik[0] = 1250;    //  50
//  mypik[0] = 1721;    //  55
//  mypik[0] = 3500;    //  210
//  mypik[0] = 10000;   //  530

if (Number.isInteger(mypik[0]) === false)
{
    alert('Failed to get piks!\nhtml:[' + origHTML + '], pik:[' + mypik[0] + '], type:[' + typeof mypik[0] + ']');
    return;
}

var remainderPik = mypik[0];

for (var i=0; i<bonsis.length; i++) {
    myeur[i] = Math.floor(remainderPik / bonsis[i].pik);
    remainderPik = remainderPik % bonsis[i].pik;
}

for (var i=0; i<myeur.length; i++) {
    sum += (myeur[i] * bonsis[i].eur);
}

//alert('Pik:' + mypik[0] + ' Sum:' + sum);
allcells[3].innerHTML = origHTML + "<font color='purple'>&nbsp;=&nbsp;" + sum + "&nbsp;EUR</font><br/>";
allcells[3].innerHTML = allcells[3].innerHTML + "<font color='purple'>&#40;Porabiti do: " + currentPeriodEnds.toDateString() + "&nbsp;oz.&nbsp;" + dateDiffInDays(today, currentPeriodEnds) + "&nbsp;DNI&#41;</font>";

function dateDiffInDays(a, b) {
    var dateA = Date.UTC(a.getFullYear(), a.getMonth(), a.getDate());
    var dateB = Date.UTC(b.getFullYear(), b.getMonth(), b.getDate());
    return Math.floor((dateB - dateA) / (1000 * 3600 * 24));
}