A yolo test of codex

src/app/registers/[hex]/page.tsx

@@ -1,9 +1,74 @@
+import type { Metadata } from 'next';
 import { notFound } from 'next/navigation';
 import Link from 'next/link';
 import RegisterDetail from '@/app/registers/RegisterDetail';
 import {Container, Row} from "react-bootstrap";
 import { getRegisters } from '@/services/register.service';
 
+const buildRegisterSummary = (register: { description: string; text: string; modes: { text: string }[] }) => {
+    const trimLine = (line: string) => line.trim();
+    const isInfoLine = (line: string) =>
+        line.length > 0 &&
+        !line.startsWith('//') &&
+        !line.startsWith('(R') &&
+        !line.startsWith('(W') &&
+        !line.startsWith('(R/W') &&
+        !line.startsWith('*') &&
+        !/^bits?\s+\d/i.test(line);
+
+    const modeLines = register.modes.flatMap(mode => mode.text.split('\n')).map(trimLine).filter(isInfoLine);
+    const textLines = register.text.split('\n').map(trimLine).filter(isInfoLine);
+    const descriptionLines = register.description.split('\n').map(trimLine).filter(isInfoLine);
+
+    const rawSummary = [...textLines, ...modeLines, ...descriptionLines].join(' ').replace(/\s+/g, ' ').trim();
+    if (!rawSummary) return 'Spectrum Next register details and bit-level behavior.';
+    if (rawSummary.length <= 180) return rawSummary;
+    return `${rawSummary.slice(0, 177).trimEnd()}...`;
+};
+
+export async function generateMetadata({ params }: { params: Promise<{ hex: string }> }): Promise<Metadata> {
+    const registers = await getRegisters();
+    const { hex } = await params;
+    const targetHex = decodeURIComponent(hex).toLowerCase();
+    const register = registers.find(r => r.hex_address.toLowerCase() === targetHex);
+
+    if (!register) {
+        return {
+            title: 'Register Not Found | Spectrum Next Explorer',
+            robots: { index: false, follow: false },
+        };
+    }
+
+    const summary = buildRegisterSummary(register);
+    const title = `${register.hex_address} ${register.name} | Spectrum Next Explorer`;
+    const imageUrl = `/registers/${register.hex_address}/opengraph-image`;
+
+    return {
+        title,
+        description: summary,
+        openGraph: {
+            title,
+            description: summary,
+            type: 'article',
+            url: `/registers/${register.hex_address}`,
+            images: [
+                {
+                    url: imageUrl,
+                    width: 1200,
+                    height: 630,
+                    alt: `${register.hex_address} ${register.name}`,
+                },
+            ],
+        },
+        twitter: {
+            card: 'summary_large_image',
+            title,
+            description: summary,
+            images: [imageUrl],
+        },
+    };
+}
+
 export default async function RegisterDetailPage({ params }: { params: Promise<{ hex: string }> }) {
     const registers = await getRegisters();
     const { hex } = await params;