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StackExchange sites - convert dates to local timezone

Converts dates to your local timezone

Ajankohdalta 12.8.2016. Katso uusin versio.

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You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

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// ==UserScript==
// @name        StackExchange sites - convert dates to local timezone
// @namespace   darkred
// @match       *://*.stackoverflow.com/*
// @match       *://*.stackexchange.com/*
// @match       *://*.superuser.com/*
// @match       *://*.stackapps.com/*
// @match       *://*.askubuntu.com/*
// @match       *://*.mathoverflow.net/*
// @match       *://*.serverfault.com/*
// @version     2015.12.16b
// @grant       none
// @require     https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.10.6/moment-with-locales.min.js
// @require     https://cdnjs.cloudflare.com/ajax/libs/moment-timezone/0.4.1/moment-timezone-with-data.min.js
// @require     https://cdnjs.cloudflare.com/ajax/libs/jstimezonedetect/1.0.6/jstz.min.js
// @description Converts dates to your local timezone
// ==/UserScript==

'use strict';
/* global moment,jstz */


var dates1 = document.getElementsByClassName('relativetime');
var dates2 = document.getElementsByClassName('relativetime-clean');

var array1 = Array.prototype.slice.call(dates1, 0);
var array2 = Array.prototype.slice.call(dates2, 0);


var dates = array1.concat(array2);


// "2015-12-14 14:11:13 +0000"   (tooltip with added timezone for UTC, i.e. the timezone that the StackExchange sites use)
function toTimeZone(time, zone) {
    var format1 = ('YYYY-MM-DD HH:mm:ss Z');
    var format2 = ('YYYY-MM-DD HH:mm:ss');
    return moment(time, format1).tz(zone).format(format2);
}


function getLocalTimezone(){
    var tz = jstz.determine();    // Determines the time zone of the browser client
    return tz.name();             // Returns the name of the time zone eg "Europe/Berlin"
}


var localTimezone = getLocalTimezone();


function convertTitleDates() {
    var temp;


    for (var i = 0; i < dates.length; i++) {

        // "2015-12-14 14:11:13Z"   (tooltip ---> the default tooltip)
        temp = dates[i].title;
        temp = temp.substring(0, temp.length - 1);
        temp += ' +0000';

        var format0 = ('YYYY-MM-DD HH:mm:ss Z');

        if (moment(temp, format0, true).isValid()) {

            dates[i].title = toTimeZone(temp, localTimezone);


            // 2015-12-14 10:38:53   (title, i.e. tooltip fixed --> without the last Z)
            // Dec 3 at 10:38        (innerHTML)               MMM dd at HH:hh
            // Jun 27 '12 at 13:51  ---> for older years       MMM dd 'YY at HH:hh


            var title = dates[i].title;
            var day = title.substring(8, 10);   // the '8'
            var time = title.substring(11, 16);   // the '10:38'

            if (day.substring(0, 1) === '0') {  // if the 1st digit in day is '0' then dont' use it in the replacing of datetext
                day = day.substring(1, 2);
            }



            var datetext, dateTextArray;


            //var regex3 = /.*\ (.*)\ '.*\ at\ .*/;
            var regex3 = /.*\ .*\ '.*\ at\ .*/;
            if (dates[i].innerHTML.match(regex3)) {              // the new navigation

                // Jun 27 '12 at 13:51  ---> for older years

                datetext = dates[i].innerHTML;
                dateTextArray = datetext.split(' ');
                // var year;
                dateTextArray[1] = day;
                // dateTextArray[2] = year;
                dateTextArray[4] = time;


                dates[i].innerHTML = dateTextArray.join(' ');

            } else {

            // var regex2 = /(.*at\ ).*/;
            var regex2 = /.*at\ .*/;
            if (dates[i].innerHTML.match(regex2)) {             // old new navigation

                // Dec 8 at 10:38

                datetext = dates[i].innerHTML;
                dateTextArray = datetext.split(' ');
                dateTextArray[1] = day;
                dateTextArray[3] = time;

                dates[i].innerHTML = dateTextArray.join(' ');

            }


        }


        }
    }

}




convertTitleDates();


// for new navigation
new MutationObserver(function(mutations) {
    mutations.forEach(function(mutation) {
        console.log('CHANGE');
        dates1 = document.getElementsByClassName('relativetime');
        dates2 = document.getElementsByClassName('relativetime-clean');
        array1 = Array.prototype.slice.call(dates1, 0);
        array2 = Array.prototype.slice.call(dates2, 0);
        dates = array1.concat(array2);
        convertTitleDates();
    });
}).observe(
    document.querySelector('#qlist-wrapper'), {           // monitor #mainbar for changes  (1 mutation per tab switch -in new navigation-)
        attributes: true,
        childList: true,
        characterData: true,
        subtree: true,
    }
);

// for old navigation
new MutationObserver(function(mutations) {
    mutations.forEach(function(mutation) {
        console.log('CHANGE');
        dates1 = document.getElementsByClassName('relativetime');
        dates2 = document.getElementsByClassName('relativetime-clean');
        array1 = Array.prototype.slice.call(dates1, 0);
        array2 = Array.prototype.slice.call(dates2, 0);
        dates = array1.concat(array2);
        convertTitleDates();
    });
}).observe(
    document.querySelector('#mainbar'), {              // monitor #mainbar for changes  (2 mutations per tab switch -in new navigation-)
        attributes: true,
        childList: true,
        characterData: true,
        subtree: true,
    }
);


// for question view
new MutationObserver(function(mutations) {
    mutations.forEach(function(mutation) {
        console.log('CHANGE');
        dates1 = document.getElementsByClassName('relativetime');
        dates2 = document.getElementsByClassName('relativetime-clean');
        array1 = Array.prototype.slice.call(dates1, 0);
        array2 = Array.prototype.slice.call(dates2, 0);
        dates = array1.concat(array2);
        convertTitleDates();
    });
}).observe(
    document.querySelector('#question'), {         
        attributes: true,
        childList: true,
        characterData: true,
        subtree: true,
    }
);