feat: add content system with MDX support, types, and meta files for 4 games

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/lib/content.ts

@@ -0,0 +1,93 @@
+import fs from "fs";
+import path from "path";
+import matter from "gray-matter";
+import { GameMeta, Chapter, GameWithChapters } from "@/types";
+
+const contentDir = path.join(process.cwd(), "content");
+
+export function getAllGames(): GameMeta[] {
+  const gameDirs = fs.readdirSync(contentDir).filter((dir) => {
+    const fullPath = path.join(contentDir, dir);
+    return fs.statSync(fullPath).isDirectory();
+  });
+
+  return gameDirs.map((slug) => {
+    const metaPath = path.join(contentDir, slug, "meta.json");
+    const meta = JSON.parse(fs.readFileSync(metaPath, "utf-8"));
+    return { slug, ...meta };
+  });
+}
+
+export function getGame(slug: string): GameWithChapters {
+  const metaPath = path.join(contentDir, slug, "meta.json");
+  const meta = JSON.parse(fs.readFileSync(metaPath, "utf-8"));
+
+  const gameDir = path.join(contentDir, slug);
+  const chapterFiles = fs
+    .readdirSync(gameDir)
+    .filter((f) => f.endsWith(".mdx"))
+    .sort();
+
+  const chapters = chapterFiles.map((file, index) => {
+    const filePath = path.join(gameDir, file);
+    const raw = fs.readFileSync(filePath, "utf-8");
+    const { data } = matter(raw);
+    const chapterSlug = file.replace(".mdx", "");
+
+    return {
+      slug: chapterSlug,
+      number: index + 1,
+      title: (data.title as string) || chapterSlug,
+    };
+  });
+
+  return { slug, ...meta, chapters };
+}
+
+export function getChapter(gameSlug: string, chapterSlug: string): Chapter {
+  const gameDir = path.join(contentDir, gameSlug);
+  const chapterFiles = fs
+    .readdirSync(gameDir)
+    .filter((f) => f.endsWith(".mdx"))
+    .sort();
+
+  const chapterIndex = chapterFiles.findIndex(
+    (f) => f.replace(".mdx", "") === chapterSlug
+  );
+  const filePath = path.join(gameDir, `${chapterSlug}.mdx`);
+  const raw = fs.readFileSync(filePath, "utf-8");
+  const { data, content } = matter(raw);
+
+  return {
+    slug: chapterSlug,
+    number: chapterIndex + 1,
+    title: (data.title as string) || chapterSlug,
+    content,
+  };
+}
+
+export function getAdjacentChapters(
+  gameSlug: string,
+  chapterSlug: string
+): { prev: string | null; next: string | null } {
+  const gameDir = path.join(contentDir, gameSlug);
+  const chapterFiles = fs
+    .readdirSync(gameDir)
+    .filter((f) => f.endsWith(".mdx"))
+    .sort();
+
+  const currentIndex = chapterFiles.findIndex(
+    (f) => f.replace(".mdx", "") === chapterSlug
+  );
+
+  return {
+    prev:
+      currentIndex > 0
+        ? chapterFiles[currentIndex - 1].replace(".mdx", "")
+        : null,
+    next:
+      currentIndex < chapterFiles.length - 1
+        ? chapterFiles[currentIndex + 1].replace(".mdx", "")
+        : null,
+  };
+}