add opengraph middleware

1 files changed, 42 insertions, 0 deletions

diff --git a/middleware/src/middleware.ts b/middleware/src/middleware.ts
new file mode 100644
index 0000000..78aa3f4
--- /dev/null
+++ b/middleware/src/middleware.ts
@@ -0,0 +1,42 @@
+import { NextRequest, NextResponse } from 'next/server'
+
+export async function middleware(request: NextRequest) {
+  const url = request.nextUrl
+  const pathname = url.pathname
+  if(pathname.startsWith("/_") || pathname.startsWith("/favicon")){
+    return;
+  }
+  const searchParams = url.searchParams
+  const gameName = pathname.split('/')[1] || 'news'
+  const postId = searchParams.get('post')
+  const apiUrlBase = process.env.NEXT_PUBLIC_API_URL
+  if (postId) {
+    try {
+      console.log(`Game: ${gameName}, Post ID: ${postId}`)
+      const newsDataUrl = apiUrlBase+"/"+gameName+"_news.json";
+      const res = await fetch(newsDataUrl)
+      if (res.ok) {
+        const data = await res.json()
+        const newsPosts = data["news_posts"];
+        const matchingPost = newsPosts.find((news: any) => {
+          const contentHash = news.content.split('').reduce((hash: number, char: string) => ((hash << 5) + hash) + char.charCodeAt(0), 5381) >>> 0;
+          const newsId = `${news.identifier}-${news.timestamp}-${contentHash.toString(16)}-${news.headline}`;
+          return newsId === postId;
+        });
+        const response = NextResponse.next()
+        if(matchingPost.headline){
+          response.headers.set('x-post-headline', encodeURIComponent(matchingPost.headline));
+        }
+        if(matchingPost.images && matchingPost.images.length >= 1 ){
+          response.headers.set('x-post-heroImage', matchingPost.images[0].image);
+        }
+        response.headers.set('x-post-content', encodeURIComponent(matchingPost.content));
+        response.headers.set('x-post-timestamp', matchingPost.timestamp);
+        return response
+      }
+    } catch (e) {
+      console.warn('Failed to fetch post metadata:', e)
+    }
+  }
+  return NextResponse.next()
+}