Ads: fallback chain — custom domain → workers.dev → GitHub Pages

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

Author: sghcto

Tickr/Services/AdService.swift

@@ -37,7 +37,11 @@ struct AdsPayload: Codable {
 class AdService: ObservableObject {
     static let shared = AdService()
 
-    private static let remoteURL = "https://h4ux.github.io/Tickr/ads.json"
+    private static let adEndpoints = [
+        "https://service.h4ux.com/ads-service",
+        "https://billowing-term-c225.alon-f46.workers.dev/ads",
+        "https://h4ux.github.io/Tickr/ads.json",
+    ]
 
     @Published var currentAd: AdContent
     @Published var bannerImage: NSImage?
@@ -102,19 +106,31 @@ class AdService: ObservableObject {
     }
 
     func fetchAds() {
-        guard let url = URL(string: Self.remoteURL) else { return }
+        fetchAdsFromEndpoint(index: 0)
+    }
 
-        URLSession.shared.dataTask(with: url) { [weak self] data, _, _ in
-            guard let self = self,
-                  let data = data,
-                  let payload = try? JSONDecoder().decode(AdsPayload.self, from: data),
-                  !payload.ads.isEmpty else { return }
+    private func fetchAdsFromEndpoint(index: Int) {
+        guard index < Self.adEndpoints.count,
+              let url = URL(string: Self.adEndpoints[index]) else { return }
 
-            let matching = payload.ads.filter { $0.matchesCountry(self.userCountry) }
+        var request = URLRequest(url: url)
+        request.timeoutInterval = 5
 
-            DispatchQueue.main.async {
-                self.allAds = matching.isEmpty ? payload.ads : matching
-                self.rotateAd()
+        URLSession.shared.dataTask(with: request) { [weak self] data, response, _ in
+            guard let self = self else { return }
+            let http = response as? HTTPURLResponse
+
+            if let data = data, http?.statusCode == 200,
+               let payload = try? JSONDecoder().decode(AdsPayload.self, from: data),
+               !payload.ads.isEmpty {
+                let matching = payload.ads.filter { $0.matchesCountry(self.userCountry) }
+                DispatchQueue.main.async {
+                    self.allAds = matching.isEmpty ? payload.ads : matching
+                    self.rotateAd()
+                }
+            } else {
+                // Fallback to next endpoint
+                self.fetchAdsFromEndpoint(index: index + 1)
             }
         }.resume()
     }