Implement video region support

2026-07-26 14:54:50 +01:00
parent 07ec17ad91
commit eb1f33d82f
30 changed files with 1243 additions and 134 deletions
@@ -0,0 +1,145 @@
+var videoRegionLastGoodSrcCache = Object.create(null);
+var videoRegionProbeStateCache = Object.create(null);
+var videoRegionProbeTimerCache = Object.create(null);
+var VIDEO_REGION_RETRY_DELAY_MS = 5000;
+
+function getVideoRegionCacheKey(region) {
+  return String(region && (region.regionKey || region.label) || '').trim();
+}
+
+function isDirectlyRenderableSource(src) {
+  return /^(?:https?:)?\/\//i.test(src) || /^data:/i.test(src) || /^blob:/i.test(src) || /^\/media\//i.test(src);
+}
+
+function appendCacheBust(src, cacheBust) {
+  var key = String(cacheBust || '').trim();
+  var raw = String(src || '').trim();
+  if (!raw || !key) {
+    return raw;
+  }
+  return raw + (raw.indexOf('?') === -1 ? '?' : '&') + 'v=' + encodeURIComponent(key);
+}
+
+function getVideoSourceAvailability(src) {
+  return videoRegionProbeStateCache[String(src || '').trim()] || null;
+}
+
+function setVideoSourceAvailability(src, available) {
+  var key = String(src || '').trim();
+  if (!key) {
+    return;
+  }
+  videoRegionProbeStateCache[key] = {
+    available: available === null ? null : Boolean(available),
+    checkedAt: Date.now()
+  };
+}
+
+function logVideoRegionStatus(message, details, level) {
+  if (typeof logDebug === 'function') {
+    logDebug(message, details || '', level || 'info');
+  }
+}
+
+function triggerVideoRegionSourceRefresh() {
+  if (typeof window.notifyVideoRegionSourceReady === 'function') {
+    window.notifyVideoRegionSourceReady();
+    return;
+  }
+
+  if (typeof videoRegionRenderVersion === 'number') {
+    videoRegionRenderVersion += 1;
+  }
+  slideMarkupCache = Object.create(null);
+  if (typeof showCurrent === 'function' && slides && slides.length) {
+    showCurrent();
+  }
+}
+
+function scheduleVideoSourceProbe(regionKey, src, isRetry) {
+  var key = String(src || '').trim();
+  if (!regionKey || !key || isDirectlyRenderableSource(key)) {
+    if (key) {
+      setVideoSourceAvailability(key, true);
+    }
+    return;
+  }
+
+  if (videoRegionProbeTimerCache[key]) {
+    return;
+  }
+
+  if (!isRetry) {
+    logVideoRegionStatus('Video source changed; probing mirrored file before swapping.', 'region=' + regionKey + ' src=' + key);
+  } else {
+    logVideoRegionStatus('Video source still unavailable; retrying mirrored file probe.', 'region=' + regionKey + ' src=' + key, 'warn');
+  }
+
+  videoRegionProbeTimerCache[key] = window.setTimeout(function () {
+    delete videoRegionProbeTimerCache[key];
+    fetch(key, {
+      method: 'HEAD',
+      cache: 'no-store',
+      credentials: 'same-origin'
+    }).then(function (response) {
+      if (response && response.ok) {
+        setVideoSourceAvailability(key, true);
+        if (videoRegionLastGoodSrcCache[regionKey] !== key) {
+          videoRegionLastGoodSrcCache[regionKey] = key;
+          logVideoRegionStatus('Mirrored video is ready; switching to the new source.', 'region=' + regionKey + ' src=' + key);
+          triggerVideoRegionSourceRefresh();
+        }
+        return;
+      }
+
+      setVideoSourceAvailability(key, false);
+      logVideoRegionStatus('Mirrored video probe returned unavailable; keeping the old source for now.', 'region=' + regionKey + ' src=' + key, 'warn');
+      scheduleVideoSourceProbe(regionKey, key, true);
+    }).catch(function () {
+      setVideoSourceAvailability(key, false);
+      logVideoRegionStatus('Mirrored video probe failed; keeping the old source for now.', 'region=' + regionKey + ' src=' + key, 'warn');
+      scheduleVideoSourceProbe(regionKey, key, true);
+    });
+  }, isRetry ? VIDEO_REGION_RETRY_DELAY_MS : 0);
+}
+
+function renderVideoRegion(region, regionContent) {
+  var requestedSrc = String(regionContent && regionContent.value || '').trim();
+  var requestedSrcVersioned = appendCacheBust(requestedSrc, regionContent && regionContent.cache_bust);
+  var regionKey = getVideoRegionCacheKey(region);
+  var cachedSrc = regionKey ? String(videoRegionLastGoodSrcCache[regionKey] || '').trim() : '';
+  var cachedSrcVersioned = appendCacheBust(cachedSrc, regionContent && regionContent.cache_bust);
+
+  if (!requestedSrc) {
+    return '<div class="template-region video" style="' + region.baseStyle + '"><div class="template-region-placeholder">Video</div></div>';
+  }
+
+  if (isDirectlyRenderableSource(requestedSrc)) {
+    if (regionKey) {
+      videoRegionLastGoodSrcCache[regionKey] = requestedSrc;
+    }
+    setVideoSourceAvailability(requestedSrc, true);
+    return '<div class="template-region video" style="' + region.baseStyle + '"><video src="' + escapeHtml(requestedSrcVersioned) + '" title="' + escapeHtml(region.label) + '" autoplay muted loop playsinline preload="auto" disablepictureinpicture oncanplay="this.play().catch(function () {})" onloadedmetadata="this.play().catch(function () {})"></video></div>';
+  }
+
+  var requestedState = getVideoSourceAvailability(requestedSrc);
+  var requestedReady = Boolean(requestedState && requestedState.available === true);
+
+  if (requestedReady) {
+    if (regionKey) {
+      videoRegionLastGoodSrcCache[regionKey] = requestedSrc;
+    }
+    return '<div class="template-region video" style="' + region.baseStyle + '"><video src="' + escapeHtml(requestedSrcVersioned) + '" title="' + escapeHtml(region.label) + '" autoplay muted loop playsinline preload="auto" disablepictureinpicture oncanplay="this.play().catch(function () {})" onloadedmetadata="this.play().catch(function () {})"></video></div>';
+  }
+
+  scheduleVideoSourceProbe(regionKey, requestedSrc, false);
+
+  if (cachedSrc) {
+    if (cachedSrc !== requestedSrc) {
+      logVideoRegionStatus('Keeping the previous playable video until the new mirrored file finishes transferring.', 'region=' + regionKey + ' old=' + cachedSrc + ' new=' + requestedSrc);
+    }
+    return '<div class="template-region video" style="' + region.baseStyle + '"><video src="' + escapeHtml(cachedSrcVersioned) + '" title="' + escapeHtml(region.label) + '" autoplay muted loop playsinline preload="auto" disablepictureinpicture oncanplay="this.play().catch(function () {})" onloadedmetadata="this.play().catch(function () {})"></video></div>';
+  }
+
+  return '<div class="template-region video" style="' + region.baseStyle + '"><div class="template-region-placeholder">Video</div></div>';
+}