Archive-Film-Club/offline.html at main · SethMorrowSoftware/Archive-Film-Club · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <meta name="robots" content="noindex" />
  <title>Offline — Archive Film Club</title>
  <style>
    html, body { margin: 0; padding: 0; background: #0a0a0b; color: #eee;
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      min-height: 100vh; }
    main { min-height: 100vh; display: flex; align-items: center; justify-content: center;
      padding: 2rem 1rem; text-align: center; }
    .card { max-width: 32rem; }
    h1 { font-size: 1.6rem; margin: 0 0 .5rem; }
    p { color: #8a8a92; margin: 0 0 1.25rem; line-height: 1.55; }
    button { padding: .7em 1.3em; border-radius: 6px; border: 0;
      background: #ff0000; color: #fff; font-weight: 500; cursor: pointer;
      font: inherit; }
    button:hover { background: #cc0000; }
    button[disabled] { opacity: .6; cursor: progress; }
    .icon { font-size: 3rem; margin-bottom: 1rem; opacity: .8; }
    .status { margin-top: 1.25rem; font-size: .85rem; color: #5a5a64; }
  </style>
</head>
<body>
  <main>
    <div class="card">
      <div class="icon" aria-hidden="true">📡</div>
      <h1>You&rsquo;re offline.</h1>
      <p>It looks like your device isn&rsquo;t connected to the internet right now. Pages you&rsquo;ve already visited may still work &mdash; try going back to a previous page.</p>
      <button id="retry" type="button">Try again</button>
      <p class="status" id="status" hidden>Checking for connection&hellip;</p>
    </div>
  </main>
  <script>
    // Auto-recover. The SW serves this page when a fetch fails, but the
    // actual cause is often transient (sleep/wake, captive portal, VPN
    // reconnect). Probe every 5 seconds — and on the browser's `online`
    // event — and reload as soon as we can reach the API.
    (function () {
      var retryBtn = document.getElementById('retry');
      var status = document.getElementById('status');
      var inflight = false;

      function setBusy(busy, msg) {
        inflight = busy;
        retryBtn.disabled = busy;
        if (msg) {
          status.hidden = false;
          status.textContent = msg;
        } else {
          status.hidden = true;
        }
      }

      function probe() {
        if (inflight) return;
        setBusy(true, 'Checking for connection…');
        var ctl = new AbortController();
        var t = setTimeout(function () { ctl.abort(); }, 4000);
        fetch('api/index.php', {
          method: 'HEAD',
          cache: 'no-store',
          signal: ctl.signal,
        }).then(function (res) {
          clearTimeout(t);
          if (res && (res.ok || res.status < 500)) {
            setBusy(false, 'Back online — reloading…');
            window.location.reload();
            return;
          }
          setBusy(false);
        }).catch(function () {
          clearTimeout(t);
          setBusy(false);
        });
      }

      retryBtn.addEventListener('click', probe);
      window.addEventListener('online', probe);
      window.addEventListener('focus', probe);
      setInterval(probe, 5000);
    })();
  </script>
</body>
</html>