From 2e7d98420900e1d6749729ea2a94c334e7d65754 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Mon, 27 Apr 2026 07:12:51 +0000
Subject: fix: guard generateMetadata against NaN and sub-1 page numbers

Agent-Logs-Url: https://github.com/bertyuan/next-blog/sessions/a183ee36-4a5d-49b3-a43d-dba5985217dd

Co-authored-by: bertyuan <189593334+bertyuan@users.noreply.github.com>
---
 src/app/(main)/(home)/posts/page.tsx          | 12 +++++++-----
 src/app/(main)/(home)/tags/[...slug]/page.tsx | 12 +++++++-----
 2 files changed, 14 insertions(+), 10 deletions(-)

(limited to 'src/app/(main)')

diff --git a/src/app/(main)/(home)/posts/page.tsx b/src/app/(main)/(home)/posts/page.tsx
index 376f5c1..45016a4 100644
--- a/src/app/(main)/(home)/posts/page.tsx
+++ b/src/app/(main)/(home)/posts/page.tsx
@@ -128,7 +128,7 @@ export async function generateMetadata(
 ): Promise<Metadata> {
   const searchParams = await props.searchParams;
 
-  const pageIndex = searchParams.page
+  const rawPage = searchParams.page
     ? Number.parseInt(
         Array.isArray(searchParams.page)
           ? (searchParams.page[0] ?? '')
@@ -137,13 +137,15 @@ export async function generateMetadata(
       )
     : 1;
 
-  const isFirstPage = pageIndex === 1 || !searchParams.page;
-  const pageTitle = isFirstPage ? 'Posts' : `Posts - Page ${pageIndex}`;
-  const canonicalUrl = isFirstPage ? '/posts' : `/posts?page=${pageIndex}`;
+  if (Number.isNaN(rawPage) || rawPage < 1) notFound();
+
+  const isFirstPage = rawPage === 1 || !searchParams.page;
+  const pageTitle = isFirstPage ? 'Posts' : `Posts - Page ${rawPage}`;
+  const canonicalUrl = isFirstPage ? '/posts' : `/posts?page=${rawPage}`;
 
   return createMetadata({
     title: pageTitle,
-    description: `Posts${!isFirstPage ? ` - Page ${pageIndex}` : ''}`,
+    description: `Posts${!isFirstPage ? ` - Page ${rawPage}` : ''}`,
     openGraph: {
       url: canonicalUrl,
     },
diff --git a/src/app/(main)/(home)/tags/[...slug]/page.tsx b/src/app/(main)/(home)/tags/[...slug]/page.tsx
index 30c6464..b6bdafa 100644
--- a/src/app/(main)/(home)/tags/[...slug]/page.tsx
+++ b/src/app/(main)/(home)/tags/[...slug]/page.tsx
@@ -165,7 +165,7 @@ export async function generateMetadata(
   const searchParams = await props.searchParams;
 
   const tag = params.slug[0];
-  const pageIndex = searchParams.page
+  const rawPage = searchParams.page
     ? Number.parseInt(
         Array.isArray(searchParams.page)
           ? (searchParams.page[0] ?? '')
@@ -174,18 +174,20 @@ export async function generateMetadata(
       )
     : 1;
 
-  const isFirstPage = pageIndex === 1 || !searchParams.page;
+  if (Number.isNaN(rawPage) || rawPage < 1) notFound();
+
+  const isFirstPage = rawPage === 1 || !searchParams.page;
   const pageTitle = isFirstPage
     ? `${tag} Posts`
-    : `${tag} Posts - Page ${pageIndex}`;
+    : `${tag} Posts - Page ${rawPage}`;
   const canonicalUrl = isFirstPage
     ? `/tags/${tag}`
-    : `/tags/${tag}?page=${pageIndex}`;
+    : `/tags/${tag}?page=${rawPage}`;
 
   return createMetadata({
     title: pageTitle,
     description: `Posts tagged with ${tag}${
-      !isFirstPage ? ` - Page ${pageIndex}` : ''
+      !isFirstPage ? ` - Page ${rawPage}` : ''
     }`,
     openGraph: {
       url: canonicalUrl,
-- 
cgit v1.2.3