feat: add exist endpoint

packages/app/server/routes/~/[owner]/[repo].head.ts

@@ -0,0 +1,60 @@
+import {
+  createError,
+  defineEventHandler,
+  getRouterParams,
+  setHeader,
+} from "h3";
+import { hasRepoReleases } from "../../../utils/bucket";
+
+export default defineEventHandler(async (event) => {
+  const { owner, repo } = getRouterParams(event) as {
+    owner?: string;
+    repo?: string;
+  };
+
+  if (!owner || !repo) {
+    throw createError({
+      statusCode: 400,
+      statusMessage: "Owner and repo are required",
+    });
+  }
+
+  const normalizedOwner = owner.trim();
+  const normalizedRepo = repo.trim();
+
+  if (!normalizedOwner || !normalizedRepo) {
+    throw createError({
+      statusCode: 400,
+      statusMessage: "Owner and repo are required",
+    });
+  }
+
+  const exactMatch = await hasRepoReleases(
+    event,
+    normalizedOwner,
+    normalizedRepo,
+  );
+  const hasReleases =
+    exactMatch ||
+    (await hasRepoReleases(
+      event,
+      normalizedOwner.toLowerCase(),
+      normalizedRepo.toLowerCase(),
+    ));
+
+  setHeader(
+    event,
+    "Cache-Control",
+    "public, max-age=60, s-maxage=300, stale-while-revalidate=600",
+  );
+  setHeader(event, "x-has-releases", hasReleases ? "1" : "0");
+
+  if (!hasReleases) {
+    throw createError({
+      statusCode: 404,
+      statusMessage: "No releases found",
+    });
+  }
+
+  return null;
+});

packages/app/server/utils/bucket.ts

@@ -111,6 +111,26 @@ export async function getRepoReleaseCount(
   }
 }
 
+export async function hasRepoReleases(
+  event: Event,
+  owner: string,
+  repo: string,
+): Promise<boolean> {
+  try {
+    const binding = useBinding(event);
+    const prefix = `${usePackagesBucket.base}:${owner}:${repo}:`;
+    const response = await binding.list({
+      limit: 1,
+      prefix,
+    } as any);
+
+    return response.objects.length > 0;
+  } catch (error) {
+    console.error(`Error checking releases for ${owner}/${repo}:`, error);
+    return false;
+  }
+}
+
 export function useTemplatesBucket(event: Event) {
   const storage = useBucket(event);
   return prefixStorage<Uint8Array>(storage, useTemplatesBucket.key);