feat(blog): isolate articles by locale and add initial english posts

data/blog-detail.ts

@@ -12,6 +12,7 @@ export type BlogDetail = {
   excerpt: string;
   coverImage: string;
   markdown: string;
+  lang: "tr" | "en";
 };
 
 const BLOG_CONTENT_DIR = path.join(process.cwd(), "content", "blog");
@@ -40,10 +41,11 @@ function mapMarkdownToBlogDetail(fileName: string, raw: string): BlogDetail {
     excerpt: toSafeString(parsed.data.excerpt, ""),
     coverImage: toSafeString(parsed.data.coverImage, "/news/design.svg"),
     markdown: parsed.content.trim(),
+    lang: toSafeString(parsed.data.lang, "tr") as "tr" | "en",
   };
 }
 
-export async function listBlogDetails(): Promise<BlogDetail[]> {
+export async function listBlogDetails(locale?: string): Promise<BlogDetail[]> {
   let files: string[] = [];
   try {
     files = await fs.readdir(BLOG_CONTENT_DIR);
@@ -60,7 +62,10 @@ export async function listBlogDetails(): Promise<BlogDetail[]> {
     }),
   );
 
-  return posts.sort((a, b) => a.slug.localeCompare(b.slug));
+  const targetLang = locale || "tr";
+  return posts
+    .filter((post) => post.lang === targetLang)
+    .sort((a, b) => a.slug.localeCompare(b.slug));
 }
 
 export async function getBlogDetailBySlug(slug: string): Promise<BlogDetail | null> {

data/blog.ts

@@ -54,8 +54,8 @@ function normalizeCategory(value: string) {
   return value.trim().toLocaleLowerCase();
 }
 
-export async function getAllBlogArticles(): Promise<BlogArticleItem[]> {
-  const posts = await listBlogDetails();
+export async function getAllBlogArticles(locale?: string): Promise<BlogArticleItem[]> {
+  const posts = await listBlogDetails(locale);
 
   const articles = posts.map((post) => ({
     id: post.slug,
@@ -73,8 +73,8 @@ export async function getAllBlogArticles(): Promise<BlogArticleItem[]> {
   return sortByDateDesc(articles);
 }
 
-export async function getHomeBlogNews(limit = 3) {
-  const articles = await getAllBlogArticles();
+export async function getHomeBlogNews(locale?: string, limit = 3) {
+  const articles = await getAllBlogArticles(locale);
 
   return articles.slice(0, limit).map((item) => ({
     id: `home-news-${item.slug}`,
@@ -87,12 +87,13 @@ export async function getHomeBlogNews(limit = 3) {
 }
 
 export async function getBlogPageData(
+  locale?: string,
   page = 1,
   pageSize = 12,
   selectedCategoryParam?: string,
   searchQueryParam?: string,
 ): Promise<BlogPageData> {
-  const articles = await getAllBlogArticles();
+  const articles = await getAllBlogArticles(locale);
   const categories = BLOG_CATEGORIES;
   const categoryByNormalized = new Map(
     categories.map((category) => [normalizeCategory(category), category]),