fix(webhook): treat HTTP 409 (rebuild already running) as success, not error

The pmtiles-webhook returns 409 when a rebuild is already in progress.
Previously this was treated as a failure, showing 'Webhook PMTiles
indisponibil' error to the user. Now 409 is handled as a valid state
with appropriate messaging.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/app/(modules)/monitor/page.tsx

@@ -161,13 +161,15 @@ export default function MonitorPage() {
         headers: { "Content-Type": "application/json" },
         body: JSON.stringify({ action: "rebuild" }),
       });
-      const result = await res.json() as { ok?: boolean; error?: string; previousPmtiles?: { lastModified: string }; webhookStatus?: number };
+      const result = await res.json() as { ok?: boolean; error?: string; alreadyRunning?: boolean; previousPmtiles?: { lastModified: string } };
       if (!result.ok) {
         addLog("error", result.error ?? "Eroare necunoscuta");
         setActionLoading("");
         return;
       }
-      addLog("ok", `Webhook trimis (HTTP ${result.webhookStatus}). Rebuild in curs...`);
+      addLog("ok", result.alreadyRunning
+        ? "Rebuild deja in curs. Se monitorizeaza..."
+        : "Webhook trimis. Rebuild pornit...");
       rebuildPrevRef.current = result.previousPmtiles?.lastModified ?? null;
       // Poll every 15s to check if PMTiles was updated
       if (pollRef.current) clearInterval(pollRef.current);

src/app/api/geoportal/monitor/route.ts

@@ -162,8 +162,8 @@ export async function POST(request: NextRequest) {
   if (action === "rebuild") {
     // Get current PMTiles state before rebuild
     const before = await getPmtilesInfo();
-    const ok = await firePmtilesRebuild("manual-rebuild");
-    if (!ok) {
+    const result = await firePmtilesRebuild("manual-rebuild");
+    if (!result.ok) {
       return NextResponse.json(
         { error: "Webhook PMTiles indisponibil — verifica N8N_WEBHOOK_URL si serviciul pmtiles-webhook" },
         { status: 500 },
@@ -172,8 +172,11 @@ export async function POST(request: NextRequest) {
     return NextResponse.json({
       ok: true,
       action: "rebuild",
+      alreadyRunning: result.alreadyRunning ?? false,
       previousPmtiles: before,
-      message: "Rebuild PMTiles pornit. Dureaza ~8 min. Urmareste PMTiles last-modified.",
+      message: result.alreadyRunning
+        ? "Rebuild PMTiles deja in curs. Urmareste PMTiles last-modified."
+        : "Rebuild PMTiles pornit. Dureaza ~8 min. Urmareste PMTiles last-modified.",
     });
   }
 

src/modules/parcel-sync/services/pmtiles-webhook.ts

@@ -9,10 +9,10 @@ const WEBHOOK_URL = process.env.N8N_WEBHOOK_URL || "";
 export async function firePmtilesRebuild(
   event: string,
   metadata?: Record<string, unknown>,
-): Promise<boolean> {
+): Promise<{ ok: boolean; alreadyRunning?: boolean }> {
   if (!WEBHOOK_URL) {
     console.warn("[pmtiles-webhook] N8N_WEBHOOK_URL not configured — skipping rebuild trigger");
-    return false;
+    return { ok: false };
   }
 
   try {
@@ -27,13 +27,17 @@ export async function firePmtilesRebuild(
     });
     if (res.ok) {
       console.log(`[pmtiles-webhook] Rebuild triggered (event: ${event}, HTTP ${res.status})`);
-      return true;
+      return { ok: true };
+    }
+    if (res.status === 409) {
+      console.log(`[pmtiles-webhook] Rebuild already running (event: ${event})`);
+      return { ok: true, alreadyRunning: true };
     }
     console.warn(`[pmtiles-webhook] Webhook returned HTTP ${res.status}`);
-    return false;
+    return { ok: false };
   } catch (err) {
     const msg = err instanceof Error ? err.message : String(err);
     console.warn(`[pmtiles-webhook] Failed: ${msg}`);
-    return false;
+    return { ok: false };
   }
 }