feat(baoyu-danger-x-to-markdown): add video media support for X articles

skills/baoyu-danger-x-to-markdown/scripts/markdown.test.ts

@@ -53,3 +53,126 @@ print('hello from x article')
 
 After the snippet.`);
 });
+
+test("formatArticleMarkdown renders article video media as poster plus video link", () => {
+  const posterUrl = "https://pbs.twimg.com/amplify_video_thumb/123/img/poster.jpg";
+  const videoUrl = "https://video.twimg.com/amplify_video/123/vid/avc1/720x720/demo.mp4?tag=21";
+  const article = {
+    title: "Video Example",
+    content_state: {
+      blocks: [
+        {
+          type: "unstyled",
+          text: "Intro text.",
+          entityRanges: [],
+        },
+        {
+          type: "atomic",
+          text: " ",
+          entityRanges: [{ key: 0, offset: 0, length: 1 }],
+        },
+      ],
+      entityMap: {
+        "0": {
+          key: "0",
+          value: {
+            type: "MEDIA",
+            mutability: "Immutable",
+            data: {
+              caption: "Demo reel",
+              mediaItems: [{ mediaId: "vid-1" }],
+            },
+          },
+        },
+      },
+    },
+    media_entities: [
+      {
+        media_id: "vid-1",
+        media_info: {
+          __typename: "ApiVideo",
+          preview_image: {
+            original_img_url: posterUrl,
+          },
+          variants: [
+            {
+              content_type: "video/mp4",
+              bit_rate: 256000,
+              url: videoUrl,
+            },
+          ],
+        },
+      },
+    ],
+  };
+
+  const { markdown } = formatArticleMarkdown(article);
+
+  expect(markdown).toContain("Intro text.");
+  expect(markdown).toContain(`![Demo reel](${posterUrl})`);
+  expect(markdown).toContain(`[video](${videoUrl})`);
+  expect(markdown).not.toContain(`![Demo reel](${videoUrl})`);
+  expect(markdown).not.toContain("## Media");
+});
+
+test("formatArticleMarkdown renders unused article videos in trailing media section", () => {
+  const posterUrl = "https://pbs.twimg.com/amplify_video_thumb/456/img/poster.jpg";
+  const videoUrl = "https://video.twimg.com/amplify_video/456/vid/avc1/1080x1080/demo.mp4?tag=21";
+  const article = {
+    title: "Trailing Media Example",
+    plain_text: "Body text.",
+    media_entities: [
+      {
+        media_id: "vid-2",
+        media_info: {
+          __typename: "ApiVideo",
+          preview_image: {
+            original_img_url: posterUrl,
+          },
+          variants: [
+            {
+              content_type: "video/mp4",
+              bit_rate: 832000,
+              url: videoUrl,
+            },
+          ],
+        },
+      },
+    ],
+  };
+
+  const { markdown, coverUrl } = formatArticleMarkdown(article);
+
+  expect(coverUrl).toBeNull();
+  expect(markdown).toContain("## Media");
+  expect(markdown).toContain(`![video](${posterUrl})`);
+  expect(markdown).toContain(`[video](${videoUrl})`);
+});
+
+test("formatArticleMarkdown keeps coverUrl as preview image for video cover media", () => {
+  const posterUrl = "https://pbs.twimg.com/amplify_video_thumb/789/img/poster.jpg";
+  const videoUrl = "https://video.twimg.com/amplify_video/789/vid/avc1/720x720/demo.mp4?tag=21";
+  const article = {
+    title: "Video Cover Example",
+    plain_text: "Body text.",
+    cover_media: {
+      media_info: {
+        __typename: "ApiVideo",
+        preview_image: {
+          original_img_url: posterUrl,
+        },
+        variants: [
+          {
+            content_type: "video/mp4",
+            bit_rate: 1280000,
+            url: videoUrl,
+          },
+        ],
+      },
+    },
+  };
+
+  const { coverUrl } = formatArticleMarkdown(article);
+
+  expect(coverUrl).toBe(posterUrl);
+});

skills/baoyu-danger-x-to-markdown/scripts/markdown.ts

@@ -18,6 +18,17 @@ export type FormatArticleOptions = {
   referencedTweets?: Map<string, ReferencedTweetInfo>;
 };
 
+type ResolvedMediaAsset =
+  | {
+      kind: "image";
+      url: string;
+    }
+  | {
+      kind: "video";
+      url: string;
+      posterUrl?: string;
+    };
+
 function coerceArticleEntity(value: unknown): ArticleEntity | null {
   if (!value || typeof value !== "object") return null;
   const candidate = value as ArticleEntity;
@@ -109,58 +120,127 @@ function resolveEntityEntry(
   return entityMap[String(entityKey)];
 }
 
-function resolveMediaUrl(info?: ArticleMediaInfo): string | undefined {
+function resolveVideoUrl(info?: ArticleMediaInfo): string | undefined {
   if (!info) return undefined;
-  if (info.original_img_url) return info.original_img_url;
-  if (info.preview_image?.original_img_url) return info.preview_image.original_img_url;
   const variants = info.variants ?? [];
   const mp4 = variants
     .filter((variant) => variant?.content_type?.includes("video"))
     .sort((a, b) => (b.bit_rate ?? 0) - (a.bit_rate ?? 0))[0];
-  return mp4?.url ?? variants[0]?.url;
+  return mp4?.url ?? variants.find((variant) => typeof variant?.url === "string")?.url;
 }
 
-function buildMediaById(article: ArticleEntity): Map<string, string> {
-  const map = new Map<string, string>();
+function resolveMediaAsset(info?: ArticleMediaInfo): ResolvedMediaAsset | undefined {
+  if (!info) return undefined;
+
+  const posterUrl = info.preview_image?.original_img_url ?? info.original_img_url;
+  const videoUrl = resolveVideoUrl(info);
+  if (videoUrl) {
+    return {
+      kind: "video",
+      url: videoUrl,
+      posterUrl,
+    };
+  }
+
+  const imageUrl = info.original_img_url ?? info.preview_image?.original_img_url;
+  if (imageUrl) {
+    return {
+      kind: "image",
+      url: imageUrl,
+    };
+  }
+
+  return undefined;
+}
+
+function resolveFallbackMediaAsset(rawUrl?: string): ResolvedMediaAsset | undefined {
+  if (!rawUrl) return undefined;
+
+  if (/^https:\/\/video\.twimg\.com\//i.test(rawUrl) || /\.(mp4|m4v|mov|webm)(?:$|[?#])/i.test(rawUrl)) {
+    return {
+      kind: "video",
+      url: rawUrl,
+    };
+  }
+
+  return {
+    kind: "image",
+    url: rawUrl,
+  };
+}
+
+function resolveCoverUrl(info?: ArticleMediaInfo): string | undefined {
+  if (!info) return undefined;
+  return info.original_img_url ?? info.preview_image?.original_img_url;
+}
+
+function buildMediaIdentity(asset: ResolvedMediaAsset): string {
+  return asset.kind === "video"
+    ? `video:${asset.url}:${asset.posterUrl ?? ""}`
+    : `image:${asset.url}`;
+}
+
+function renderMediaLines(
+  asset: ResolvedMediaAsset,
+  altText: string,
+  usedUrls: Set<string>
+): string[] {
+  if (asset.kind === "video") {
+    const lines: string[] = [];
+    if (asset.posterUrl && !usedUrls.has(asset.posterUrl)) {
+      usedUrls.add(asset.posterUrl);
+      lines.push(`![${altText || "video"}](${asset.posterUrl})`);
+    }
+    if (!usedUrls.has(asset.url)) {
+      usedUrls.add(asset.url);
+      lines.push(`[video](${asset.url})`);
+    }
+    return lines;
+  }
+
+  if (usedUrls.has(asset.url)) {
+    return [];
+  }
+
+  usedUrls.add(asset.url);
+  return [`![${altText}](${asset.url})`];
+}
+
+function buildMediaById(article: ArticleEntity): Map<string, ResolvedMediaAsset> {
+  const map = new Map<string, ResolvedMediaAsset>();
   for (const entity of article.media_entities ?? []) {
     if (!entity?.media_id) continue;
-    const url = resolveMediaUrl(entity.media_info);
-    if (url) {
-      map.set(entity.media_id, url);
+    const asset = resolveMediaAsset(entity.media_info);
+    if (asset) {
+      map.set(entity.media_id, asset);
     }
   }
   return map;
 }
 
-function collectMediaUrls(
-  article: ArticleEntity,
-  usedUrls: Set<string>,
-  excludeUrl?: string
-): string[] {
-  const urls: string[] = [];
-  const addUrl = (url?: string) => {
-    if (!url) return;
-    if (excludeUrl && url === excludeUrl) {
-      usedUrls.add(url);
-      return;
-    }
-    if (usedUrls.has(url)) return;
-    usedUrls.add(url);
-    urls.push(url);
+function collectMediaAssets(article: ArticleEntity): ResolvedMediaAsset[] {
+  const assets: ResolvedMediaAsset[] = [];
+  const seen = new Set<string>();
+  const addAsset = (asset?: ResolvedMediaAsset) => {
+    if (!asset) return;
+    const identity = buildMediaIdentity(asset);
+    if (seen.has(identity)) return;
+    seen.add(identity);
+    assets.push(asset);
   };
 
   for (const entity of article.media_entities ?? []) {
-    addUrl(resolveMediaUrl(entity?.media_info));
+    addAsset(resolveMediaAsset(entity?.media_info));
   }
 
-  return urls;
+  return assets;
 }
 
 function resolveEntityMediaLines(
   entityKey: number | undefined,
   entityMap: ArticleContentState["entityMap"] | undefined,
   entityLookup: EntityLookup,
-  mediaById: Map<string, string>,
+  mediaById: Map<string, ResolvedMediaAsset>,
   usedUrls: Set<string>
 ): string[] {
   if (entityKey === undefined) return [];
@@ -182,17 +262,16 @@ function resolveEntityMediaLines(
         : typeof item?.media_id === "string"
           ? item.media_id
           : undefined;
-    const url = mediaId ? mediaById.get(mediaId) : undefined;
-    if (url && !usedUrls.has(url)) {
-      usedUrls.add(url);
-      lines.push(`![${altText}](${url})`);
+    const asset = mediaId ? mediaById.get(mediaId) : undefined;
+    if (asset) {
+      lines.push(...renderMediaLines(asset, altText, usedUrls));
     }
   }
 
   const fallbackUrl = typeof value.data?.url === "string" ? value.data.url : undefined;
-  if (fallbackUrl && !usedUrls.has(fallbackUrl)) {
-    usedUrls.add(fallbackUrl);
-    lines.push(`![${altText}](${fallbackUrl})`);
+  const fallbackAsset = resolveFallbackMediaAsset(fallbackUrl);
+  if (fallbackAsset) {
+    lines.push(...renderMediaLines(fallbackAsset, altText, usedUrls));
   }
 
   return lines;
@@ -346,7 +425,7 @@ function renderContentBlocks(
   blocks: ArticleBlock[],
   entityMap: ArticleContentState["entityMap"] | undefined,
   entityLookup: EntityLookup,
-  mediaById: Map<string, string>,
+  mediaById: Map<string, ResolvedMediaAsset>,
   usedUrls: Set<string>,
   mediaLinkMap: Map<number, string>,
   referencedTweets?: Map<string, ReferencedTweetInfo>
@@ -602,7 +681,7 @@ export function formatArticleMarkdown(
     lines.push(`# ${title}`);
   }
 
-  const coverUrl = resolveMediaUrl(candidate.cover_media?.media_info) ?? null;
+  const coverUrl = resolveCoverUrl(candidate.cover_media?.media_info) ?? null;
   if (coverUrl) {
     usedUrls.add(coverUrl);
   }
@@ -633,12 +712,13 @@ export function formatArticleMarkdown(
     lines.push(candidate.preview_text.trim());
   }
 
-  const mediaUrls = collectMediaUrls(candidate, usedUrls, coverUrl ?? undefined);
-  if (mediaUrls.length > 0) {
-    lines.push("", "## Media", "");
-    for (const url of mediaUrls) {
-      lines.push(`![](${url})`);
+  const trailingMediaLines: string[] = [];
+  for (const asset of collectMediaAssets(candidate)) {
+    trailingMediaLines.push(...renderMediaLines(asset, "", usedUrls));
   }
+  if (trailingMediaLines.length > 0) {
+    lines.push("", "## Media", "");
+    lines.push(...trailingMediaLines);
   }
 
   return { markdown: lines.join("\n").trimEnd(), coverUrl };

skills/baoyu-danger-x-to-markdown/scripts/media-localizer.ts

@@ -202,6 +202,13 @@ function toHighResUrl(rawUrl: string): string {
   }
 }
 
+function isPlausibleMediaUrl(rawUrl: string): boolean {
+  const ext = resolveExtensionFromUrl(rawUrl);
+  if (ext && (IMAGE_EXTENSIONS.has(ext) || VIDEO_EXTENSIONS.has(ext))) return true;
+  if (resolveKindFromHostname(rawUrl) !== undefined) return true;
+  return false;
+}
+
 function collectMarkdownLinkCandidates(markdown: string): MarkdownLinkCandidate[] {
   const candidates: MarkdownLinkCandidate[] = [];
   const seen = new Set<string>();
@@ -221,10 +228,12 @@ function collectMarkdownLinkCandidates(markdown: string): MarkdownLinkCandidate[
     const label = match[1] ?? "";
     const rawUrl = match[3] ?? "";
     if (!rawUrl || seen.has(rawUrl)) continue;
+    const isImage = label.startsWith("![");
+    if (!isImage && !isPlausibleMediaUrl(rawUrl)) continue;
     seen.add(rawUrl);
     candidates.push({
       url: rawUrl,
-      hint: label.startsWith("![") ? "image" : "unknown",
+      hint: isImage ? "image" : "unknown",
     });
   }