Finished API integration

server/utils/trackerHelper.ts

@@ -0,0 +1,54 @@
+import type { MagnetUrl } from "../../shared/types/magnet";
+
+let cachedTrackers: string[] | null = null;
+let lastFetched = 0;
+const CACHE_TTL = 1000 * 60 * 10; // 10 minutes
+
+export async function getTrackers(): Promise<string[]> {
+  const now = Date.now();
+
+  if (cachedTrackers && now - lastFetched < CACHE_TTL) {
+    return cachedTrackers;
+  }
+
+  const TRACKER_URLS = [
+    "https://raw.githubusercontent.com/XIU2/TrackersListCollection/refs/heads/master/all.txt",
+    "https://raw.githubusercontent.com/ngosang/trackerslist/refs/heads/master/trackers_all.txt",
+  ];
+
+  for (const url of TRACKER_URLS) {
+    try {
+      const response = await fetch(url);
+      if (response.ok) {
+        const text = await response.text();
+        const trackers = text
+          .split("\n")
+          .map((line) => line.trim())
+          .filter((line) => line !== "");
+
+        // update cache
+        cachedTrackers = trackers;
+        lastFetched = now;
+        return trackers;
+      }
+    } catch (err) {
+      console.error(err);
+    }
+  }
+
+  // fallback: return cached even if stale, or empty
+  return cachedTrackers ?? [];
+}
+
+export function addTrackers(magnet: MagnetUrl, trackers: string[]): MagnetUrl {
+  if (trackers.length > 0) {
+    // avoid duplicates
+    const existing = new Set(magnet.tr ?? []);
+    for (const tracker of trackers) {
+      if (!existing.has(tracker)) {
+        magnet.tr?.push(tracker);
+      }
+    }
+  }
+  return magnet;
+}