Initial commit

app/api/transcoder/claim/route.ts

@@ -0,0 +1,60 @@
+// app/api/transcoder/claim/route.ts
+// Atomically claims the next available transcoding job.
+// Uses SELECT … FOR UPDATE SKIP LOCKED so multiple workers never race on the
+// same video.
+
+import { NextResponse } from "next/server";
+import { prisma } from "@/lib/prisma";
+import { Prisma } from "@prisma/client";
+import { verifyTranscoderToken } from "@/lib/transcoder-auth";
+
+export const dynamic = "force-dynamic";
+
+export async function POST(request: Request) {
+  if (!verifyTranscoderToken(request)) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+
+  try {
+    const video = await prisma.$transaction(async (tx) => {
+      // Atomically lock the oldest uploaded video, skipping rows already
+      // locked by concurrent workers.
+      const rows = await tx.$queryRaw<{ id: string }[]>(
+        Prisma.sql`
+          SELECT id
+          FROM   "Video"
+          WHERE  "transcodingStatus" = 'uploaded'
+          ORDER  BY "createdAt" ASC
+          LIMIT  1
+          FOR    UPDATE SKIP LOCKED
+        `
+      );
+
+      if (rows.length === 0) return null;
+
+      return tx.video.update({
+        where: { id: rows[0].id },
+        data: { transcodingStatus: "processing" },
+      });
+    });
+
+    if (!video) {
+      // No work available – return null body so the worker knows to stop.
+      return NextResponse.json(null, { status: 200 });
+    }
+
+    // Build the download URL from the public CMS base URL.
+    const cmsBase =
+      process.env.NEXTAUTH_URL?.replace(/\/$/, "") ??
+      process.env.CMS_PUBLIC_URL?.replace(/\/$/, "") ??
+      "";
+
+    return NextResponse.json({
+      videoId: video.id,
+      downloadUrl: `${cmsBase}/api/transcoder/download/${video.id}`,
+    });
+  } catch (err) {
+    console.error("[Transcoder Claim] Error:", err);
+    return NextResponse.json({ error: "Internal server error" }, { status: 500 });
+  }
+}