Create multi-upload status check

functions/api/uploads/status.ts

@@ -0,0 +1,44 @@
+export async function onRequestPost(context: RequestContext) {
+  const { body } = context.data;
+
+  if (
+    !Array.isArray(body) ||
+    body.find((attachment) => typeof attachment !== "string")
+  )
+    return new Response(
+      '{"error":"Request body must be an array of strings"}',
+      {
+        headers: {
+          "content-type": "application/json",
+        },
+        status: 400,
+      },
+    );
+
+  if (body.length > 3)
+    return new Response('{"error":"Too many video ids"}', {
+      headers: {
+        "content-type": "application/json",
+      },
+      status: 400,
+    });
+
+  const kvPromises = [];
+
+  for (const attachment of body)
+    kvPromises.push(context.env.DATA.get(`videoprocessing_${attachment}`));
+
+  const kvResults = await Promise.allSettled(kvPromises);
+
+  if (kvResults.find((result) => result.status === "rejected"))
+    return new Response('{"error":"Failed to check status of attachments"}', {
+      headers: {
+        "content-type": "application/json",
+      },
+      status: 500,
+    });
+
+  return new Response(null, {
+    status: kvResults.find((result) => result !== null) ? 409 : 204,
+  });
+}