fix: fix upgrade banner to be triggered after package upload

ui/src/app/api/config/latest-version/route.ts

@@ -0,0 +1,77 @@
+import { NextResponse } from "next/server";
+
+const GHCR_IMAGES = ["dograh-hq/dograh-ui", "dograh-hq/dograh-api"] as const;
+const SEMVER_RE = /^(\d+)\.(\d+)\.(\d+)$/;
+const REVALIDATE_SECONDS = 60 * 60;
+
+type Semver = [number, number, number];
+
+function parseSemver(tag: string): Semver | null {
+  const m = tag.match(SEMVER_RE);
+  if (!m) return null;
+  return [Number(m[1]), Number(m[2]), Number(m[3])];
+}
+
+function compareSemver(a: Semver, b: Semver): number {
+  for (let i = 0; i < 3; i++) {
+    if (a[i] !== b[i]) return a[i] - b[i];
+  }
+  return 0;
+}
+
+async function fetchLatestTag(image: string): Promise<string | null> {
+  const tokenRes = await fetch(
+    `https://ghcr.io/token?scope=repository:${image}:pull&service=ghcr.io`,
+    { next: { revalidate: REVALIDATE_SECONDS } },
+  );
+  if (!tokenRes.ok) return null;
+  const { token } = (await tokenRes.json()) as { token?: string };
+  if (!token) return null;
+
+  const tagsRes = await fetch(`https://ghcr.io/v2/${image}/tags/list`, {
+    headers: { Authorization: `Bearer ${token}` },
+    next: { revalidate: REVALIDATE_SECONDS },
+  });
+  if (!tagsRes.ok) return null;
+  const { tags } = (await tagsRes.json()) as { tags?: string[] };
+
+  let latest: { tag: string; parsed: Semver } | null = null;
+  for (const tag of tags ?? []) {
+    const parsed = parseSemver(tag);
+    if (!parsed) continue;
+    if (!latest || compareSemver(parsed, latest.parsed) > 0) {
+      latest = { tag, parsed };
+    }
+  }
+  return latest?.tag ?? null;
+}
+
+export async function GET() {
+  try {
+    const results = await Promise.all(GHCR_IMAGES.map(fetchLatestTag));
+
+    // Only advertise an update once every image has published a tag at that
+    // version — otherwise we'd nudge users to upgrade before the matching
+    // container actually exists.
+    let minLatest: { tag: string; parsed: Semver } | null = null;
+    for (const tag of results) {
+      if (!tag) return NextResponse.json({ latest: null }, { status: 200 });
+      const parsed = parseSemver(tag);
+      if (!parsed) return NextResponse.json({ latest: null }, { status: 200 });
+      if (!minLatest || compareSemver(parsed, minLatest.parsed) < 0) {
+        minLatest = { tag, parsed };
+      }
+    }
+
+    return NextResponse.json(
+      { latest: minLatest?.tag ?? null },
+      {
+        headers: {
+          "Cache-Control": `public, max-age=${REVALIDATE_SECONDS}, s-maxage=${REVALIDATE_SECONDS}`,
+        },
+      },
+    );
+  } catch {
+    return NextResponse.json({ latest: null }, { status: 200 });
+  }
+}