first implementation finished

2024-04-22 11:21:01 +02:00
parent 1a13ca0795
commit 0e1972242a
102 changed files with 7192 additions and 55 deletions
@@ -0,0 +1,57 @@
+import 'dart:async';
+
+import 'package:kagi_bang_bang/features/kagi/data/services/autosuggest.dart';
+import 'package:kagi_bang_bang/utils/lru_cache.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+import 'package:rxdart/rxdart.dart';
+
+part 'autosuggest.g.dart';
+
+@Riverpod(keepAlive: true)
+class AutosuggestRepository extends _$AutosuggestRepository {
+  final LRUCache<String, List<String>> _cache;
+
+  late StreamController<String> _queryStreamController;
+
+  AutosuggestRepository() : _cache = LRUCache(100);
+
+  void addQuery(String query) {
+    _queryStreamController.add(query);
+  }
+
+  @override
+  Raw<Stream<List<String>>> build() {
+    _queryStreamController = StreamController();
+    ref.onDispose(() async {
+      await _queryStreamController.close();
+    });
+
+    return _queryStreamController.stream
+        .sampleTime(const Duration(milliseconds: 100))
+        .switchMap<List<String>>(
+      (query) {
+        if (query.isEmpty) {
+          return Stream.value([]);
+        }
+
+        final cached = _cache.get(query);
+        if (cached != null) {
+          return Stream.value(cached);
+        }
+
+        return ref
+            .read(kagiAutosuggestServiceProvider.notifier)
+            // ignore: discarded_futures
+            .getSuggestions(query)
+            // ignore: discarded_futures
+            .then((result) {
+          result.onSuccess((result) {
+            _cache.set(query, result);
+          });
+
+          return result.value;
+        }).asStream();
+      },
+    ).asBroadcastStream();
+  }
+}