[HWM] ClanActivity

Информация об активности игроков клана
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// ==UserScript==
// @name         [HWM] ClanActivity
// @namespace    [HWM] ClanActivity
// @version      0.1.0
// @description  Информация об активности игроков клана
// @author       Komdosh
// @include      http*://*.heroeswm.ru/clan_info.php*
// @grant        none
// @license      MIT
// ==/UserScript==

const charsRows = document.querySelectorAll('table[style="border-top: none;"] tr');

const charsTable = document.querySelector('table[style="border-top: none;"]');
const actionRow = document.createElement('tr');
actionRow.append(document.createElement('td'));
actionRow.append(document.createElement('td'));
actionRow.append(document.createElement('td'));
actionRow.append(document.createElement('td'));
const lastTd = document.createElement('td');
lastTd.style = 'text-align: right';
const getInfoButton = document.createElement('span');
getInfoButton.style='cursor:pointer;';
let isActivated = false;
getInfoButton.onclick = ()=>{
    if(isActivated){
        return;
    }
    isActivated = true;
    actionRow.remove();
    displayUserActivity();
};
getInfoButton.innerText = 'Загрузить даты посещения';
lastTd.append(getInfoButton);
actionRow.append(lastTd);
charsTable.insertBefore(actionRow,charsTable.firstChild);

let indexTimeout = 0;

function displayUserActivity(){
    for (const row of charsRows){
        const children = row.children;
        const tdClassName = children[0].className;
        const isOnline = tdClassName == 'wblight';

        const activityTd = document.createElement('td');
        activityTd.className = tdClassName;
        if(!isOnline){
           setTimeout(()=>{
            whenOnline(children[2].children[0].href).then(days=>{
                if(!days){
                    daysSpan.innerHTML = '';
                    return;
                }
                const daysSpan = document.createElement('span');
                if(days<7){
                    daysSpan.style = 'color: #5800ff;';
                } else if(days<14){
                    daysSpan.style = 'color: #ff9a00;';
                } else{
                    daysSpan.style = 'color: #e70606; font-weight: 700;';
                }
                daysSpan.innerHTML = `${days} д.`;
                activityTd.append(daysSpan);
            });
           }, indexTimeout*100);
        }else{
            activityTd.innerText = '';
        }
        row.append(activityTd);
    }
}
// **********************************************************
async function whenOnline(userInfoUrl){
    return new Promise(function (resolve, reject) {
        var xhr = new XMLHttpRequest();
        xhr.open('GET', encodeURI(userInfoUrl));
        xhr.onload = function(){
            if (xhr.status === 200)
            {
                var div = document.createElement( 'div' );
                div.id = 'kom-clanActivity';
                div.style.display = 'none';
                div.innerHTML = xhr.responseText;
                document.getElementsByTagName('body')[0].appendChild( div );

                const lastTimeElement = div.querySelector('i');
                if(lastTimeElement == null){
                     resolve(null);
                    return;
                }
                const whenOnlineLastTimeText = lastTimeElement.innerText;
                let time = whenOnlineLastTimeText.split(' ');
                time = time[time.length-2];
                let date = whenOnlineLastTimeText.split(' ');
                date = date[date.length-1].split('-');
                const whenOnlineLastTime = new Date(`${time} ${date[1]}-${date[0]}-${date[2]}`);

                const diffTime = Math.abs(Date.now()-whenOnlineLastTime);
                const diffDays = Math.ceil(diffTime / (1000 * 60 * 60 * 24));

                resolve(diffDays);
            }
            else {
                console.log('Request failed.  Returned status of ' + xhr.status);
                resolve(null);
            }
        };
        xhr.send();
    });
}