added ad provider

filcnaplo/lib/api/client.dart

@@ -1,6 +1,7 @@
 import 'dart:convert';
 import 'dart:developer';
 
+import 'package:filcnaplo/models/ad.dart';
 import 'package:filcnaplo/models/config.dart';
 import 'package:filcnaplo/models/news.dart';
 import 'package:filcnaplo/models/release.dart';
@@ -19,6 +20,7 @@ class FilcAPI {
 
   // Private API
   static const config = "https://api.refilc.hu/v1/private/config";
+  static const ads = "https://api.refilc.hu/v1/private/ads";
   static const reportApi = "https://api.refilc.hu/v1/private/crash-report";
   static const premiumApi = "https://api.filcnaplo.hu/premium/activate";
   // static const premiumScopesApi = "https://api.filcnaplo.hu/premium/scopes";
@@ -117,6 +119,24 @@ class FilcAPI {
     return null;
   }
 
+  static Future<List<Ad>?> getAds() async {
+    try {
+      http.Response res = await http.get(Uri.parse(ads));
+
+      if (res.statusCode == 200) {
+        return (jsonDecode(res.body) as List)
+            .cast<Map>()
+            .map((e) => Ad.fromJson(e))
+            .toList();
+      } else {
+        throw "HTTP ${res.statusCode}: ${res.body}";
+      }
+    } on Exception catch (error, stacktrace) {
+      log("ERROR: FilcAPI.getAds: $error $stacktrace");
+    }
+    return null;
+  }
+
   static Future<List<Release>?> getReleases() async {
     try {
       http.Response res = await http.get(Uri.parse(releases));

filcnaplo/lib/api/providers/ad_provider.dart

@@ -0,0 +1,29 @@
+import 'package:filcnaplo/api/client.dart';
+import 'package:filcnaplo/models/ad.dart';
+import 'package:flutter/material.dart';
+
+class AdProvider extends ChangeNotifier {
+  // private
+  late List<Ad> _ads;
+  bool get available => _ads.isNotEmpty;
+
+  // public
+  List<Ad> get ads => _ads;
+
+  AdProvider({
+    List<Ad> initialAds = const [],
+    required BuildContext context,
+  }) {
+    _ads = List.castFrom(initialAds);
+  }
+
+  Future<void> fetch() async {
+    _ads = await FilcAPI.getAds() ?? [];
+    _ads.sort((a, b) => -a.date.compareTo(b.date));
+
+    // check for new ads
+    if (_ads.isNotEmpty) {
+      notifyListeners();
+    }
+  }
+}