1 files changed, 49 insertions, 3 deletions

diff --git a/src/pages/og/[slug].png.ts b/src/pages/og/[slug].png.ts
index 712a39f..67a4d7c 100644
--- a/src/pages/og/[slug].png.ts
+++ b/src/pages/og/[slug].png.ts
@@ -1,6 +1,9 @@
 import satori from "satori";
 import { Resvg } from "@resvg/resvg-js";
-import { readFileSync } from "node:fs";
+import { readFileSync, existsSync, readdirSync } from "node:fs";
+import path from "node:path";
+
+const contentDir = "src/content/docs";
 
 const pages: Record<string, string> = {
   index: "だれもがしあわせに暮らせるまちへ",
@@ -22,8 +25,45 @@ const pages: Record<string, string> = {
   "ippan-situmon": "一般質問",
 };
 
+function findMdxFiles(dir: string): string[] {
+  if (!existsSync(dir)) return [];
+  const files: string[] = [];
+  for (const entry of readdirSync(dir, { withFileTypes: true })) {
+    if (entry.name.startsWith(".") || entry.name.startsWith("_")) continue;
+    const full = path.join(dir, entry.name);
+    if (entry.isDirectory()) files.push(...findMdxFiles(full));
+    else if (entry.name.endsWith(".mdx")) files.push(full);
+  }
+  return files;
+}
+
+function readTitle(filePath: string): string | null {
+  try {
+    const content = readFileSync(filePath, "utf-8");
+    const m =
+      content.match(/^title:\s*"(.+?)"/m) ?? content.match(/^title:\s*(.+)/m);
+    return m?.[1] ?? null;
+  } catch {
+    return null;
+  }
+}
+
 export async function getStaticPaths() {
-  return Object.keys(pages).map((slug) => ({ params: { slug } }));
+  const slugs = new Set<string>();
+  // Manual pages
+  for (const s of Object.keys(pages)) slugs.add(s);
+  // Auto-discover ippan-situmon pages
+  for (const f of findMdxFiles(path.join(contentDir, "ippan-situmon"))) {
+    const s = f
+      .replace(/\\/g, "/")
+      .replace(contentDir + "/", "")
+      .replace(/\.mdx$/, "")
+      .replace(/\/index$/, "");
+    if (s) slugs.add(s);
+  }
+  return [...slugs]
+    .filter((s) => s.length > 0)
+    .map((slug) => ({ params: { slug: slug.replace(/\//g, "-") } }));
 }
 
 const fontBuffer = readFileSync("node_modules/.noto-sans-jp.otf");
@@ -72,7 +112,13 @@ const stars = [
 
 export async function GET({ params }: { params: { slug: string } }) {
   const slug = params.slug;
-  const title = pages[slug] ?? "小平市議 安竹洋平 公式サイト";
+  // Convert - back to / for nested paths
+  const fileSlug = slug.replace(/-/g, "/");
+  let title = pages[fileSlug];
+  if (!title) {
+    const mdxPath = path.join(contentDir, fileSlug + ".mdx");
+    title = readTitle(mdxPath) ?? "小平市議 安竹洋平 公式サイト";
+  }
 
   const svg = await satori(
     {