MediaWiki:Common.js: Difference between revisions

Revision as of 22:22, 3 October 2026

(function () {
  var root = document.getElementById('pc-podcast');
  if (!root) return;

  var feed = root.dataset.feed, page = root.dataset.page;
  var deck = root.querySelector('.pc-deck'), nav = root.querySelector('.pc-nav');
  var cards = [], dots = [], active = 0;

  function el(tag, cls, text) {
    var e = document.createElement(tag);
    if (cls) e.className = cls;
    if (text) e.textContent = text;
    return e;
  }

  function safeUrl(u) { return /^https?:\/\//i.test(u || '') ? u : ''; }
  function txt(node, tag) { var n = node.getElementsByTagName(tag)[0]; return n ? n.textContent.trim() : ''; }
  function plain(html) {
    return new DOMParser().parseFromString(html || '', 'text/html').body.textContent.replace(/\s+/g, ' ').trim();
  }
  function parseDate(s) {
    var d = new Date(s);
    if (isNaN(d)) d = new Date(String(s).replace(' ', 'T') + 'Z');
    return d;
  }
  function fmtDate(s) {
    var d = parseDate(s);
    return isNaN(d) ? '' : d.toLocaleDateString(undefined, { month: 'short', day: 'numeric', year: 'numeric' });
  }
  function fmtDur(v) {
    if (!v) return '';
    if (v.indexOf(':') > -1) return v.replace(/^00:/, '').replace(/^0(\d:)/, '$1');
    var s = parseInt(v, 10);
    if (!s) return '';
    var h = Math.floor(s / 3600), m = Math.floor((s % 3600) / 60), sec = s % 60;
    return (h ? h + ':' + ('0' + m).slice(-2) : m) + ':' + ('0' + sec).slice(-2);
  }

  function fromXml(xml) {
    var doc = new DOMParser().parseFromString(xml, 'application/xml');
    var chImg = doc.getElementsByTagName('itunes:image')[0];
    var chCover = chImg ? chImg.getAttribute('href') : '';

    return Array.prototype.map.call(doc.getElementsByTagName('item'), function (it) {
      var img = it.getElementsByTagName('itunes:image')[0];
      var s = txt(it, 'itunes:season'), e = txt(it, 'itunes:episode');

      return {
        title: txt(it, 'title'),
        link: txt(it, 'link'),
        date: txt(it, 'pubDate'),
        dur: fmtDur(txt(it, 'itunes:duration')),
        tag: e ? (s ? 'S' + s + ' · ' : '') + 'E' + e : '',
        desc: plain(txt(it, 'description')),
        cover: (img && img.getAttribute('href')) || chCover
      };
    });
  }

  function fromJson(j) {
    var chCover = j.feed && j.feed.image;
    return (j.items || []).map(function (it) {
      return {
        title: it.title,
        link: it.link,
        date: it.pubDate,
        dur: '',
        tag: '',
        desc: plain(it.description),
        cover: it.thumbnail || chCover
      };
    });
  }

  function buildCard(ep) {
    var c = el('article', 'pc-card');
    var cover = el('div', 'pc-cover');

    if (safeUrl(ep.cover)) {
      var img = el('img');
      img.alt = '';
      img.loading = 'lazy';
      img.onerror = function () { cover.textContent = '🎙️'; };
      img.src = ep.cover;
      cover.appendChild(img);
    } else {
      cover.textContent = '🎙️';
    }

    var body = el('div', 'pc-body');
    var meta = el('div', 'pc-meta');

    if (ep.tag) meta.appendChild(el('span', 'pc-pill pc-pill-strong', ep.tag));
    var ds = fmtDate(ep.date);
    if (ds) meta.appendChild(el('span', 'pc-pill', ds));
    if (ep.dur) meta.appendChild(el('span', 'pc-pill', ep.dur));
    if (meta.children.length) body.appendChild(meta);

    var href = safeUrl(ep.link) || safeUrl(page);
    var title = el('div', 'pc-title');
    title.setAttribute('role', 'heading');
    title.setAttribute('aria-level', '3');

    var a = el('a', '', ep.title || 'Untitled episode');
    if (href) {
      a.href = href;
      a.target = '_blank';
      a.rel = 'noopener';
    }
    title.appendChild(a);
    body.appendChild(title);
    body.appendChild(el('p', 'pc-desc', ep.desc));

    c.appendChild(cover);
    c.appendChild(body);

    if (href) {
      var o = el('div', 'mc-open');
      var oa = el('a');
      oa.href = href;
      oa.target = '_blank';
      oa.rel = 'noopener';
      oa.title = 'Open episode';
      oa.setAttribute('aria-label', 'Open episode');
      oa.appendChild(el('span', 'mc-open-icon'));
      o.appendChild(oa);
      c.appendChild(o);
    }

    return c;
  }

  function layout() {
    var n = cards.length;
    if (!n) return;

    cards.forEach(function (c, i) {
      var pos = (i - active + n) % n;
      c.dataset.pos = pos;
      c.inert = pos !== 0;
      c.setAttribute('aria-hidden', pos ? 'true' : 'false');
    });

    dots.forEach(function (d, i) {
      d.setAttribute('aria-current', i === active ? 'true' : 'false');
    });
  }

  function go(delta) {
    active = (active + delta + cards.length) % cards.length;
    layout();
  }

  function arrow(label, path, delta) {
    var b = el('button', 'pc-btn');
    b.type = 'button';
    b.setAttribute('aria-label', label);
    b.innerHTML = '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="' + path + '"/></svg>';
    b.addEventListener('click', function () { go(delta); });
    return b;
  }

  function render(list) {
    if (!list || !list.length) return;

    list = list
      .filter(function (e) { return e.title; })
      .sort(function (a, b) { return parseDate(b.date) - parseDate(a.date); })
      .slice(0, 3);

    if (!list.length) return;

    deck.innerHTML = '';
    nav.innerHTML = '';
    cards = [];
    dots = [];
    active = 0;

    list.forEach(function (ep) {
      var card = buildCard(ep);
      cards.push(card);
      deck.appendChild(card);
    });

    for (var k = cards.length; k < 3; k++) {
      var g = el('div', 'pc-card pc-ghost');
      g.dataset.pos = k;
      g.setAttribute('aria-hidden', 'true');
      deck.appendChild(g);
    }

    root.classList.add('is-loaded');

    if (cards.length > 1) {
      var wrap = el('div', 'pc-dots');

      cards.forEach(function (_, i) {
        var d = el('button', 'pc-dot');
        d.type = 'button';
        d.setAttribute('aria-label', 'Episode ' + (i + 1));
        d.addEventListener('click', function () {
          active = i;
          layout();
        });
        dots.push(d);
        wrap.appendChild(d);
      });

      nav.appendChild(arrow('Previous episode', 'm15 18-6-6 6-6', -1));
      nav.appendChild(wrap);
      nav.appendChild(arrow('Next episode', 'm9 18 6-6-6-6', 1));

      var sx = null;
      deck.addEventListener('pointerdown', function (e) { sx = e.clientX; });
      deck.addEventListener('pointerup', function (e) {
        if (sx === null) return;
        var dx = e.clientX - sx;
        sx = null;
        if (Math.abs(dx) > 45) go(dx < 0 ? 1 : -1);
      });
    }

    layout();
  }

  fetch(feed)
    .then(function (r) { if (!r.ok) throw new Error('feed'); return r.text(); })
    .then(fromXml)
    .catch(function () {
      return fetch('https://api.rss2json.com/v1/api.json?rss_url=' + encodeURIComponent(feed))
        .then(function (r) { return r.json(); })
        .then(fromJson);
    })
    .then(render)
    .catch(function () { /* leave empty */ });
})();