perf(extensions): load store summaries and check updates asynchronously (#1583)

ui/flutter/lib/api/gopeed_site_api.dart

@@ -11,6 +11,8 @@ class GopeedSiteApi {
   static final instance = GopeedSiteApi._();
 
   static const _host = 'gopeed.com';
+  final _storePages = <String, ({StoreExtensionPage page, DateTime expires})>{};
+  final _storeRequests = <String, Future<StoreExtensionPage>>{};
 
   Future<List<dynamic>> getReleases({int perPage = 10}) async {
     final json = await _getJson('/api/releases', queryParameters: {'per_page': perPage.clamp(1, 100).toString()});
@@ -26,20 +28,52 @@ class GopeedSiteApi {
     StoreExtensionSort sort = StoreExtensionSort.stars,
     StoreSortOrder order = StoreSortOrder.desc,
     String? query,
+    bool forceRefresh = false,
   }) async {
-    final json = await _getJson(
-      '/api/extensions',
-      queryParameters: {
-        'page': page.toString(),
-        'limit': limit.clamp(1, 100).toString(),
-        'sort': sort.name,
-        'order': order.name,
-        if (query != null && query.trim().isNotEmpty) 'q': query.trim(),
-      },
-    );
+    final params = {
+      'page': page.toString(),
+      'limit': limit.clamp(1, 100).toString(),
+      'sort': sort.name,
+      'order': order.name,
+      'view': 'summary',
+      if (query != null && query.trim().isNotEmpty) 'q': query.trim(),
+    };
+    final key = Uri.https(_host, '/api/extensions', params).toString();
+    final now = DateTime.now();
+    _storePages.removeWhere((_, entry) => !now.isBefore(entry.expires));
+    final cached = _storePages[key];
+    if (!forceRefresh && cached != null) return cached.page;
+    final pending = _storeRequests[key];
+    if (pending != null) return pending;
+    final request = _fetchStorePage(params);
+    _storeRequests[key] = request;
+    try {
+      final result = await request;
+      if (_storePages.length >= 32) _storePages.remove(_storePages.keys.first);
+      _storePages[key] = (page: result, expires: DateTime.now().add(const Duration(minutes: 2)));
+      return result;
+    } finally {
+      _storeRequests.remove(key);
+    }
+  }
+
+  Future<StoreExtensionPage> _fetchStorePage(Map<String, String> params) async {
+    final json = await _getJson('/api/extensions', queryParameters: params);
     return StoreExtensionPage.fromJson(json as Map<String, dynamic>);
   }
 
+  Future<StoreExtension> getExtension(String id, {String? version}) async {
+    final json = await _getJsonUri(
+      Uri(
+        scheme: 'https',
+        host: _host,
+        pathSegments: ['api', 'extensions', id],
+        queryParameters: {if (version != null && version.isNotEmpty) 'version': version},
+      ),
+    );
+    return StoreExtension.fromJson(json as Map<String, dynamic>);
+  }
+
   Future<void> reportExtensionInstall(String id) async {
     final uri = Uri.https(_host, '/api/extensions/install');
     await proxyRequest(
@@ -49,8 +83,11 @@ class GopeedSiteApi {
     );
   }
 
-  Future<dynamic> _getJson(String path, {Map<String, String>? queryParameters}) async {
-    final uri = Uri.https(_host, path, queryParameters);
+  Future<dynamic> _getJson(String path, {Map<String, String>? queryParameters}) {
+    return _getJsonUri(Uri.https(_host, path, queryParameters));
+  }
+
+  Future<dynamic> _getJsonUri(Uri uri) async {
     final Response<String> response = await proxyRequest(uri.toString());
     if (response.data == null || response.data!.isEmpty) {
       throw Exception('Empty response from $uri');