1 files changed, 111 insertions, 0 deletions
diff --git a/public/js/album.js b/public/js/album.js
new file mode 100644
index 0000000..74d524c
--- /dev/null
+++ b/public/js/album.js
@@ -0,0 +1,111 @@
+'use strict';
+
+let lbIndex = 0;
+
+function openLightbox(i) {
+  lbIndex = i;
+  renderLightbox();
+  document.getElementById('lightbox').classList.remove('hidden');
+  document.body.style.overflow = 'hidden';
+  document.addEventListener('keydown', lbKey);
+}
+
+function closeLightbox() {
+  document.getElementById('lightbox').classList.add('hidden');
+  document.body.style.overflow = '';
+  document.removeEventListener('keydown', lbKey);
+  ['lb-video', 'lb-audio'].forEach(id => {
+    const el = document.getElementById(id);
+    el.pause && el.pause();
+  });
+  history.replaceState(null, '', location.pathname + location.search);
+}
+
+function lbNav(delta) {
+  let next = lbIndex + delta;
+  while (next >= 0 && next < ENTRIES.length && !ENTRIES[next].type) next += delta;
+  if (next >= 0 && next < ENTRIES.length) {
+    lbIndex = next;
+    renderLightbox();
+  }
+}
+
+function renderLightbox() {
+  const e   = ENTRIES[lbIndex];
+  const img = document.getElementById('lb-img');
+  const vid = document.getElementById('lb-video');
+  const aud = document.getElementById('lb-audio');
+
+  [img, vid, aud].forEach(el => { el.classList.add('hidden'); el.pause && el.pause(); });
+
+  if (e.type === 'image') {
+    img.src = e.src; img.alt = e.title;
+    img.classList.remove('hidden');
+  } else if (e.type === 'video') {
+    vid.src = e.src;
+    vid.classList.remove('hidden');
+    vid.play().catch(() => {});
+  } else if (e.type === 'audio') {
+    aud.src = e.src;
+    aud.classList.remove('hidden');
+    aud.play().catch(() => {});
+  }
+
+  document.getElementById('lb-title').textContent   = e.title !== e.name ? e.title : '';
+  document.getElementById('lb-caption').textContent = e.caption || '';
+  document.getElementById('lb-counter').textContent = `${lbIndex + 1} / ${ENTRIES.length}`;
+
+  const dl = document.getElementById('lb-download');
+  dl.href     = e.src;
+  dl.download = e.name;
+
+  // Update URL hash so the address bar is the shareable link
+  history.replaceState(null, '', location.pathname + location.search + '#photo=' + encodeURIComponent(e.name));
+}
+
+function lbCopyLink() {
+  navigator.clipboard.writeText(location.href).then(() => {
+    const btn = document.getElementById('lb-copylink');
+    const orig = btn.textContent;
+    btn.textContent = '✓ Copied!';
+    setTimeout(() => { btn.textContent = orig; }, 1800);
+  }).catch(() => {
+    // Fallback: select a temporary input
+    const tmp = document.createElement('input');
+    tmp.value = location.href;
+    document.body.appendChild(tmp);
+    tmp.select();
+    document.execCommand('copy');
+    document.body.removeChild(tmp);
+  });
+}
+
+function lbKey(ev) {
+  if (ev.key === 'Escape')       closeLightbox();
+  else if (ev.key === 'ArrowLeft')  lbNav(-1);
+  else if (ev.key === 'ArrowRight') lbNav(1);
+}
+
+// Restore lightbox from URL hash on page load
+window.addEventListener('DOMContentLoaded', () => {
+  const m = location.hash.match(/^#photo=(.+)$/);
+  if (m) {
+    const name = decodeURIComponent(m[1]);
+    const idx  = ENTRIES.findIndex(e => e.name === name);
+    if (idx >= 0) openLightbox(idx);
+  }
+});
+
+// Touch swipe
+(function () {
+  let startX = null;
+  const lb = document.getElementById('lightbox');
+  if (!lb) return;
+  lb.addEventListener('touchstart', e => { startX = e.changedTouches[0].clientX; }, { passive: true });
+  lb.addEventListener('touchend', e => {
+    if (startX === null) return;
+    const dx = e.changedTouches[0].clientX - startX;
+    if (Math.abs(dx) > 50) lbNav(dx < 0 ? 1 : -1);
+    startX = null;
+  }, { passive: true });
+})();