2 files changed, 58 insertions, 0 deletions
diff --git a/nuldoc-src/commands/build.ts b/nuldoc-src/commands/build.ts
index ef529e0..d523861 100644
--- a/nuldoc-src/commands/build.ts
+++ b/nuldoc-src/commands/build.ts
@@ -6,6 +6,7 @@ import { parseDocBookFile } from "../docbook/parse.ts";
 import { Page } from "../page.ts";
 import { render } from "../render.ts";
 import { generateAboutPage } from "../pages/about.ts";
+import { generateNotFoundPage } from "../pages/not_found.ts";
 import {
   generatePostPage,
   getPostCreatedDate,
@@ -19,6 +20,7 @@ export async function runBuildCommand(config: Config) {
   await buildPostListPage(posts, config);
   await buildTagPages(posts, config);
   await buildAboutPage(config);
+  await buildNotFoundPage(config);
   await copyStaticFiles(config);
 }
 
@@ -64,6 +66,11 @@ async function buildAboutPage(config: Config) {
   await writePage(aboutPage, config);
 }
 
+async function buildNotFoundPage(config: Config) {
+  const notFoundPage = await generateNotFoundPage(config);
+  await writePage(notFoundPage, config);
+}
+
 async function buildTagPages(posts: PostPage[], config: Config) {
   const tagsAndPosts = collectTags(posts);
   for (const [tag, posts] of tagsAndPosts) {
diff --git a/nuldoc-src/pages/not_found.ts b/nuldoc-src/pages/not_found.ts
new file mode 100644
index 0000000..65938dd
--- /dev/null
+++ b/nuldoc-src/pages/not_found.ts
@@ -0,0 +1,51 @@
+import { globalFooter } from "../components/global_footer.ts";
+import { globalHeader } from "../components/global_header.ts";
+import { pageLayout } from "../components/page_layout.ts";
+import { Config } from "../config.ts";
+import { el, text } from "../dom.ts";
+import { Page } from "../page.ts";
+
+export type NotFoundPage = Page;
+
+export async function generateNotFoundPage(
+  config: Config,
+): Promise<NotFoundPage> {
+  const body = el(
+    "body",
+    [["class", "single"]],
+    globalHeader(config),
+    el(
+      "main",
+      [["class", "main"]],
+      el(
+        "article",
+        [],
+        el(
+          "div",
+          [["class", "not-found"]],
+          text("404"),
+        ),
+      ),
+    ),
+    globalFooter(config),
+  );
+
+  const html = await pageLayout(
+    {
+      metaCopyrightYear: config.blog.siteCopyrightYear,
+      metaDescription: "リクエストされたページが見つかりません。",
+      metaKeywords: [],
+      metaTitle: "Page Not Found",
+      requiresSyntaxHighlight: false,
+    },
+    body,
+    config,
+  );
+
+  return {
+    root: el("__root__", [], html),
+    renderer: "html",
+    destFilePath: "/404.html",
+    href: "/404.html",
+  };
+}