Improve application responsiveness and background processing

src/lib/ui/campaigns.ts

@@ -0,0 +1,15 @@
+/** Load only the requested history, respecting the API's per-request page bound. */
+export async function fetchCampaigns<T>(filters: Record<string, string>, count: number, signal?: AbortSignal): Promise<{ deployments: T[]; total: number }> {
+    const deployments: T[] = [];
+    let total = Infinity;
+    while (deployments.length < Math.min(count, total)) {
+        const params = new URLSearchParams({ ...filters, limit: String(Math.min(500, count - deployments.length)), offset: String(deployments.length) });
+        const response = await fetch(`/api/campaigns?${params}`, { signal });
+        if (!response.ok) throw new Error('Could not refresh campaigns.');
+        const page = await response.json() as { deployments: T[]; total: number };
+        total = page.total;
+        deployments.push(...page.deployments);
+        if (!page.deployments.length) break;
+    }
+    return { deployments, total: Number.isFinite(total) ? total : 0 };
+}