Add per-kind stats, GIF hover playback, and static gif previews

poc/public/media.js

@@ -191,11 +191,31 @@
         return `${kind}${source}${channel}${author}${aspect}${resolution}${after}${before}`;
     }
 
+    function kindTotals(field) {
+        const stats = state.stats ?? {};
+        return {
+            images: (stats.image?.[field] ?? 0) + (stats.gif?.[field] ?? 0),
+            videos: stats.video?.[field] ?? 0
+        };
+    }
+
+    function countLoaded() {
+        let images = 0;
+        let videos = 0;
+        for (const item of state.items) {
+            if (item.kind === "video") videos++;
+            else if (item.kind === "image" || item.kind === "gif") images++;
+        }
+        return { images, videos };
+    }
+
     function renderStatus() {
-        const stats = state.stats ?? { total: 0, downloaded: 0, cached: 0, notDownloaded: 0 };
+        const downloaded = kindTotals("downloaded");
+        const cached = kindTotals("cached");
+        const loaded = countLoaded();
         setStatus(
-            `(Images/Videos) | Downloaded ${stats.downloaded}/${stats.total} | ` +
-                `Cached ${stats.cached}/${stats.total} (excl Downl) | Loaded ${state.items.length}/${stats.total}`
+            `(Images/Videos) | Downloaded ${downloaded.images}/${downloaded.videos} | ` +
+                `Cached ${cached.images}/${cached.videos} | Loaded ${loaded.images}/${loaded.videos}`
         );
     }
 
@@ -428,15 +448,22 @@
         const figure = el("figure", "vk-media-figure");
         const media = el("div", "vk-media-media");
         const source = gridSource(item);
-        const playable = /\.(mp4|webm|m4v)(\?|$)/i.test(item.url ?? "");
+        const videoSource = item.localUrl || item.playUrl || (item.source !== "embed" ? item.url : null);
+        const playableVideo =
+            !!videoSource &&
+            (/\.(mp4|webm|m4v)(\?|$)/i.test(videoSource) || videoSource === item.playUrl);
+        const animatedGif =
+            item.kind === "gif" && item.remotePreviewUrl && /\.gif(\?|$)/i.test(item.remotePreviewUrl)
+                ? item.remotePreviewUrl
+                : null;
 
-        if (item.kind === "video" && source && item.source !== "embed" && playable) {
+        if (item.kind === "video" && videoSource && playableVideo) {
             // Discord has no server-side video thumbnails; the browser shows the first frame.
             const video = document.createElement("video");
             video.preload = "metadata";
             video.muted = true;
             video.playsInline = true;
-            video.src = source;
+            video.src = videoSource;
             video.addEventListener(
                 "loadedmetadata",
                 () => {
@@ -452,11 +479,23 @@
             img.src = source;
             img.alt = item.kind;
             img.addEventListener("error", () => placeholder(media, item), { once: true });
+
+            // GIFs stay static in the grid and play while hovered.
+            if (animatedGif) {
+                media.addEventListener("mouseenter", () => {
+                    img.src = animatedGif;
+                });
+                media.addEventListener("mouseleave", () => {
+                    img.src = source;
+                });
+            }
+
             media.append(img);
         } else {
             placeholder(media, item);
         }
 
+        if (item.kind === "gif") media.append(el("span", "vk-media-gif-label", "GIF"));
         if (item.kind === "video") media.append(playIcon(item));
 
         media.addEventListener("click", () => openViewer(item, false));