Display additional information in VK profile

Display registration date, last profile edit and last seen in VK user profile
当前为 2019-01-24 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name           Display additional information in VK profile
// @name:ru        Отображение доп. информации на странице ВКонтакте
// @namespace      https://greasyfork.org/ru/users/155145-inlifeuser
// @version        2019.01.24
// @description    Display registration date, last profile edit and last seen in VK user profile
// @description:ru Отображение даты регистрации, последнего редактирования страницы и последний заход на странице пользователя ВКонтакте
// @author         Inlifeuser
// @license        MIT
// @include        *://vk.com/*
// @exclude        *://vk.com/notifier.php*
// @exclude        *://vk.com/*widget*.php*
// @run-at         document-end
// ==/UserScript==

'use strict';
function addLeadingZeroToDate (date) {
  return ('0' + date).slice(-2);
}
function convert24HoursTo12Hours (hours) {
  hours = hours % 12;
  return hours ? hours : 12;
}
function convert24HoursToAmPmLc (hours) {
  return hours >= 12 ? 'pm' : 'am';
}
(function () {
  new MutationObserver(function () {
    var vkUserProfile = document.body.querySelector('#profile_short:not(.display_additional_information_in_vk_profile)');
    if (!vkUserProfile) return;
    var vkAbuseButton = document.body.querySelector('a.page_actions_item[onclick*="abuse"]');
    var vkUserId;
    if (vkAbuseButton) {
      vkUserId = (vkAbuseButton.getAttribute('onclick').match(/oid: (\d+)/i) || [])[1];
    } else {
      var vkUserWall = document.body.querySelector('a.ui_tab_sel[href*="/wall"]');
      if (!vkUserWall) return;
      vkUserId = (vkUserWall.href.match(/wall(\d+)/i) || [])[1];
    }
    if (!vkUserId) return;
    vkUserProfile.className += ' display_additional_information_in_vk_profile';
    var vkPageLang = document.body.querySelector('a.ui_actions_menu_item[onclick*="lang_dialog"]');
    var vkCurrentLang;
    if (vkPageLang) {
      vkCurrentLang = vkPageLang.textContent;
    } else {
      vkCurrentLang = navigator.language.substring(0, 2);
    }
    var vkLang, vkRegMonthName;
    if (vkCurrentLang === 'Language: english' || vkCurrentLang === 'en') {
      vkLang = 'en';
      vkRegMonthName = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
    } else if (vkCurrentLang === 'Язык: русский' || vkCurrentLang === 'ru') {
      vkLang = 'ru';
      vkRegMonthName = ['января', 'февраля', 'марта', 'апреля', 'мая', 'июня', 'июля', 'августа', 'сентября', 'октября', 'ноября', 'декабря'];
    }
    var i = 0;
    while (i < 3) {
      var vkUserProfileElement = document.createElement('div');
      vkUserProfileElement.style.display = 'none';
      vkUserProfile.insertBefore(vkUserProfileElement, vkUserProfile.firstChild);
      i++;
    }
    var requestVkFoaf = new XMLHttpRequest();
    requestVkFoaf.onreadystatechange = function () {
      if (this.readyState === 4 && this.status === 200) {
        var vkFoafRegDate = (this.responseText.match(/ya:created dc:date="(.+)"/i) || [])[1];
        var vkFoafLastProfileEditDate = (this.responseText.match(/ya:modified dc:date="(.+)"/i) || [])[1];
        var vkFoafLastSeenDate = (this.responseText.match(/ya:lastLoggedIn dc:date="(.+)"/i) || [])[1];
        if (vkFoafRegDate) {
          var vkRegDate = new Date(vkFoafRegDate);
          var vkRegDateElement = document.createElement('div');
          vkRegDateElement.className = 'clear_fix profile_info_row';
          if (vkLang === 'en') {
            vkRegDateElement.innerHTML = '<div class="label fl_l">Registration date:</div><div class="labeled">' + vkRegMonthName[vkRegDate.getMonth()] + ' ' + vkRegDate.getDate() + ', ' + vkRegDate.getFullYear() + ' at ' + convert24HoursTo12Hours(vkRegDate.getHours()) + ':' + addLeadingZeroToDate(vkRegDate.getMinutes()) + ':' + addLeadingZeroToDate(vkRegDate.getSeconds()) + ' ' + convert24HoursToAmPmLc(vkRegDate.getHours()) + '</div>';
          } else if (vkLang === 'ru') {
            vkRegDateElement.innerHTML = '<div class="label fl_l">Дата регистрации:</div><div class="labeled">' + vkRegDate.getDate() + ' ' + vkRegMonthName[vkRegDate.getMonth()] + ' ' + vkRegDate.getFullYear() + ' г. ' + vkRegDate.getHours() + ':' + addLeadingZeroToDate(vkRegDate.getMinutes()) + ':' + addLeadingZeroToDate(vkRegDate.getSeconds()) + '</div>';
          } else {
            vkRegDateElement.innerHTML = '<div class="label fl_l">Registration date:</div><div class="labeled">' + addLeadingZeroToDate(vkRegDate.getDate()) + '.' + addLeadingZeroToDate(vkRegDate.getMonth() + 1) + '.' + vkRegDate.getFullYear() + ' ' + addLeadingZeroToDate(vkRegDate.getHours()) + ':' + addLeadingZeroToDate(vkRegDate.getMinutes()) + ':' + addLeadingZeroToDate(vkRegDate.getSeconds()) + '</div>';
          }
          vkUserProfile.replaceChild(vkRegDateElement, vkUserProfile.childNodes[0]);
        } else {
          console.info('Registration date on VK FOAF profile is empty or unavailable');
        }
        if (vkFoafLastProfileEditDate) {
          var vkLastProfileEditDate = new Date(vkFoafLastProfileEditDate);
          var vkLastProfileEditDateElement = document.createElement('div');
          vkLastProfileEditDateElement.className = 'clear_fix profile_info_row';
          if (vkLang === 'en') {
            vkLastProfileEditDateElement.innerHTML = '<div class="label fl_l">Last profile edit:</div><div class="labeled">' + vkRegMonthName[vkLastProfileEditDate.getMonth()] + ' ' + vkLastProfileEditDate.getDate() + ', ' + vkLastProfileEditDate.getFullYear() + ' at ' + convert24HoursTo12Hours(vkLastProfileEditDate.getHours()) + ':' + addLeadingZeroToDate(vkLastProfileEditDate.getMinutes()) + ':' + addLeadingZeroToDate(vkLastProfileEditDate.getSeconds()) + ' ' + convert24HoursToAmPmLc(vkLastProfileEditDate.getHours()) + '</div>';
          } else if (vkLang === 'ru') {
            vkLastProfileEditDateElement.innerHTML = '<div class="label fl_l">Посл. ред. стр.:</div><div class="labeled">' + vkLastProfileEditDate.getDate() + ' ' + vkRegMonthName[vkLastProfileEditDate.getMonth()] + ' ' + vkLastProfileEditDate.getFullYear() + ' г. ' + vkLastProfileEditDate.getHours() + ':' + addLeadingZeroToDate(vkLastProfileEditDate.getMinutes()) + ':' + addLeadingZeroToDate(vkLastProfileEditDate.getSeconds()) + '</div>';
          } else {
            vkLastProfileEditDateElement.innerHTML = '<div class="label fl_l">Last profile edit:</div><div class="labeled">' + addLeadingZeroToDate(vkLastProfileEditDate.getDate()) + '.' + addLeadingZeroToDate(vkLastProfileEditDate.getMonth() + 1) + '.' + vkLastProfileEditDate.getFullYear() + ' ' + addLeadingZeroToDate(vkLastProfileEditDate.getHours()) + ':' + addLeadingZeroToDate(vkLastProfileEditDate.getMinutes()) + ':' + addLeadingZeroToDate(vkLastProfileEditDate.getSeconds()) + '</div>';
          }
          vkUserProfile.replaceChild(vkLastProfileEditDateElement, vkUserProfile.childNodes[1]);
        } else {
          console.info('Last profile editing date on VK FOAF profile is empty or unavailable');
        }
        if (vkFoafLastSeenDate) {
          var vkLastSeenDate = new Date(vkFoafLastSeenDate);
          var vkLastSeenDateElement = document.createElement('div');
          vkLastSeenDateElement.className = 'clear_fix profile_info_row';
          if (vkLang === 'en') {
            vkLastSeenDateElement.innerHTML = '<div class="label fl_l">Last seen:</div><div class="labeled">' + vkRegMonthName[vkLastSeenDate.getMonth()] + ' ' + vkLastSeenDate.getDate() + ', ' + vkLastSeenDate.getFullYear() + ' at ' + convert24HoursTo12Hours(vkLastSeenDate.getHours()) + ':' + addLeadingZeroToDate(vkLastSeenDate.getMinutes()) + ':' + addLeadingZeroToDate(vkLastSeenDate.getSeconds()) + ' ' + convert24HoursToAmPmLc(vkLastSeenDate.getHours()) + '</div>';
          } else if (vkLang === 'ru') {
            vkLastSeenDateElement.innerHTML = '<div class="label fl_l">Последний заход:</div><div class="labeled">' + vkLastSeenDate.getDate() + ' ' + vkRegMonthName[vkLastSeenDate.getMonth()] + ' ' + vkLastSeenDate.getFullYear() + ' г. ' + vkLastSeenDate.getHours() + ':' + addLeadingZeroToDate(vkLastSeenDate.getMinutes()) + ':' + addLeadingZeroToDate(vkLastSeenDate.getSeconds()) + '</div>';
          } else {
            vkLastSeenDateElement.innerHTML = '<div class="label fl_l">Last seen:</div><div class="labeled">' + addLeadingZeroToDate(vkLastSeenDate.getDate()) + '.' + addLeadingZeroToDate(vkLastSeenDate.getMonth() + 1) + '.' + vkLastSeenDate.getFullYear() + ' ' + addLeadingZeroToDate(vkLastSeenDate.getHours()) + ':' + addLeadingZeroToDate(vkLastSeenDate.getMinutes()) + ':' + addLeadingZeroToDate(vkLastSeenDate.getSeconds()) + '</div>';
          }
          vkUserProfile.replaceChild(vkLastSeenDateElement, vkUserProfile.childNodes[2]);
        } else {
          console.info('Last seen date on VK FOAF profile is empty or unavailable');
        }
      } else if (this.readyState === 4 && this.status !== 200) {
        console.error('Failed to get VK FOAF profile (registration date, last profile edit date and last seen date): ' + this.status + ' ' + this.statusText);
      }
    };
    requestVkFoaf.open('GET', '/foaf.php?id=' + vkUserId, true);
    requestVkFoaf.send();
  }).observe(document.body, { childList: true, subtree: true });
})();