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GitHub Actions: Timestamps NZ Time AM/PM Toggle (Top-Center)

Show GitHub Actions timestamps in NZ time (AM/PM) with seconds, top-center toggle, live updates, SPA friendly

// ==UserScript==
// @name         GitHub Actions: Timestamps NZ Time AM/PM Toggle (Top-Center)
// @namespace    https://github.com/chaoscreater
// @version      4.0
// @description  Show GitHub Actions timestamps in NZ time (AM/PM) with seconds, top-center toggle, live updates, SPA friendly
// @author       chaoscreater
// @match        https://github.com/*/actions/runs/*
// @match        https://github.com/*/actions/runs/*/job/*
// @match        https://github.*.co.nz/*/actions/runs/*
// @match        https://github.*.co.nz/*/actions/runs/*/job/*
// @grant        none
// ==/UserScript==

(function () {
  'use strict';

  const STORAGE_KEY = 'gh_actions_auto_timestamps_enabled';

  // --- Helpers ---
  const isEnabled = () => localStorage.getItem(STORAGE_KEY) !== 'false'; // default: true
  const setEnabled = (v) => localStorage.setItem(STORAGE_KEY, v ? 'true' : 'false');

  // --- UI: Add Toggle Button ---
  function addToggleButton() {
    if (document.getElementById('gh-ts-toggle')) return;

    const btn = document.createElement('button');
    btn.id = 'gh-ts-toggle';
    btn.textContent = isEnabled() ? '⏱️ Timestamps: ON' : '⏹️ Timestamps: OFF';
    btn.style.cssText = `
      position: fixed;
      top: 10px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 99999;
      background: ${isEnabled() ? '#2ea043' : '#6e7681'};
      color: white;
      border: none;
      border-radius: 6px;
      padding: 4px 12px;
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      opacity: 0.9;
      box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    `;
    btn.title = 'Toggle auto "Show timestamps"';
    btn.onclick = () => {
      const nowEnabled = !isEnabled();
      setEnabled(nowEnabled);
      btn.textContent = nowEnabled ? '⏱️ Timestamps: ON' : '⏹️ Timestamps: OFF';
      btn.style.background = nowEnabled ? '#2ea043' : '#6e7681';
      updateTimestampsLive(nowEnabled);
    };
    document.body.appendChild(btn);
  }

  // --- Convert GMT string to NZ time with AM/PM, preserve date ---
  function convertToNZTime(gmtString) {
    const date = new Date(gmtString);
    if (isNaN(date)) return gmtString;

    // Options for NZ time conversion
    const options = {
      timeZone: 'Pacific/Auckland',
      hour12: true,
      weekday: 'short',
      year: 'numeric',
      month: 'short',
      day: '2-digit',
      hour: 'numeric',
      minute: '2-digit',
      second: '2-digit',
    };

    const nzStr = date.toLocaleString('en-NZ', options);
    // Example: "Tue, 21 Oct 2025, 6:34:29 am"

    const match = nzStr.match(/^(\w{3}, \d{2} \w{3} \d{4}), (\d{1,2}):(\d{2}):(\d{2}) (\w{2})$/);
    if (!match) return gmtString;

    const [ , dayStr, hour, minute, second, ampm ] = match;

    return `${dayStr} ${hour}:${minute}${ampm.toLowerCase()} ${second}s NZDT`;
  }

  // --- Update all timestamp elements ---
  function updateAllTimestamps() {
    const tsElements = document.querySelectorAll('.CheckStep-line-timestamp');
    tsElements.forEach(el => {
      const raw = el.textContent.trim();
      const nz = convertToNZTime(raw);
      el.textContent = nz;
    });
  }

  // --- Enable/disable timestamps live ---
  function updateTimestampsLive(enable) {
    const inputs = Array.from(document.querySelectorAll('input.js-checks-log-timestamps'));
    if (!inputs.length) return;

    for (const inp of inputs) {
      try {
        const label = inp.closest('label');
        if (!label) continue;

        if (enable && !inp.checked) label.click();
        else if (!enable && inp.checked) label.click();
      } catch (err) {
        console.error('[gh-ts] failed updating timestamp live', err);
      }
    }

    if (enable) updateAllTimestamps();
  }

  // --- Watch for DOM changes ---
  const mo = new MutationObserver(() => {
    if (isEnabled()) updateTimestampsLive(true);
  });

  function startObserving() {
    try {
      mo.observe(document.documentElement, { childList: true, subtree: true });
    } catch (e) { console.error('[gh-ts] MO start failed', e); }
  }

  // --- SPA navigation hook ---
  (function observeLocationChanges() {
    const _push = history.pushState;
    const _replace = history.replaceState;
    const emit = () => window.dispatchEvent(new Event('locationchange'));
    history.pushState = function () { _push.apply(this, arguments); emit(); };
    history.replaceState = function () { _replace.apply(this, arguments); emit(); };
    window.addEventListener('popstate', emit);
  })();

  let lastLocation = location.href;
  function onLocationChange() {
    if (location.href === lastLocation) return;
    lastLocation = location.href;
    setTimeout(() => { if (isEnabled()) updateTimestampsLive(true); }, 800);
  }

  window.addEventListener('locationchange', onLocationChange);
  window.addEventListener('load', () => {
    addToggleButton();
    startObserving();
    setTimeout(() => { if (isEnabled()) updateTimestampsLive(true); }, 1000);
  });

})();