import { readFile } from "fs/promises"; import path from "path"; import { auth } from "@/lib/auth"; const PIPELINE_ROOT = process.env.PIPELINE_ROOT || path.join(process.cwd(), "pipeline"); function markdownToHtml(md: string): string { let html = md // Headers .replace(/^#{6}\s+(.+)$/gm, "

$1

") .replace(/^#{5}\s+(.+)$/gm, "

$1

") .replace(/^#{4}\s+(.+)$/gm, "

$1

") .replace(/^###\s+(.+)$/gm, "

$1

") .replace(/^##\s+(.+)$/gm, "

$1

") .replace(/^#\s+(.+)$/gm, "

$1

") // Bold and italic .replace(/\*\*\*(.+?)\*\*\*/g, "$1") .replace(/\*\*(.+?)\*\*/g, "$1") .replace(/\*(.+?)\*/g, "$1") // Code blocks .replace(/```(\w*)\n([\s\S]*?)```/g, "

$2

") // Inline code .replace(/`([^`]+)`/g, "$1") // Unordered lists .replace(/^[-*]\s+(.+)$/gm, "

") // Ordered lists .replace(/^\d+\.\s+(.+)$/gm, "

") // Horizontal rules .replace(/^---+$/gm, "

") // Line breaks to paragraphs .replace(/\n\n+/g, "

") // Single newlines in context .replace(/\n/g, "
"); // Wrap consecutive

.*?<\/li>
?)+)/g, "
"); // Tables html = html.replace( /\|(.+)\|\n\|[-| :]+\|\n((?:\|.+\|\n?)+)/g, (_match, header: string, body: string) => { const ths = header .split("|") .filter((c: string) => c.trim()) .map((c: string) => `${c.trim()}`) .join(""); const rows = body .trim() .split("\n") .map((row: string) => { const tds = row .split("|") .filter((c: string) => c.trim()) .map((c: string) => `${c.trim()}`) .join(""); return `${tds}`; }) .join(""); return `${ths}${rows}
`; } ); return `
${html}
`; } export async function GET( _request: Request, { params }: { params: Promise<{ path: string[] }> } ) { const session = await auth(); if (!session) return new Response("Unauthorized", { status: 401 }); const { path: segments } = await params; const filePath = path.join(PIPELINE_ROOT, ...segments); const resolved = path.resolve(filePath); if (!resolved.startsWith(path.resolve(PIPELINE_ROOT))) { return new Response("Forbidden", { status: 403 }); } try { const content = await readFile(resolved, "utf-8"); const ext = path.extname(resolved).toLowerCase(); if (ext === ".md") { return new Response(markdownToHtml(content), { headers: { "Content-Type": "text/html; charset=utf-8" }, }); } if (ext === ".json") { const pretty = JSON.stringify(JSON.parse(content), null, 2); return new Response( `
```
${pretty.replace(/`,
        { headers: { "Content-Type": "text/html; charset=utf-8" } }
      );
    }

    // HTML files served as-is
    if (ext === ".html") {
      return new Response(content, {
        headers: { "Content-Type": "text/html; charset=utf-8" },
      });
    }

    // Fallback: plain text
    return new Response(content, {
      headers: { "Content-Type": "text/plain; charset=utf-8" },
    });
  } catch {
    return new Response("Not found", { status: 404 });
  }
}
```