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2026-10-15 20:36:59 +08:00
commit 6bf949949c
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+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../core/storage/search_history_store.dart';
+import '../models/video_item.dart';
+import '../services/search_service.dart';
+
+/// 搜索排序（《03-接口文档》5.10）
+enum SearchSort {
+  hot('hot', '热度'),
+  latest('latest', '最新');
+
+  const SearchSort(this.apiValue, this.label);
+
+  final String apiValue;
+  final String label;
+}
+
+/// 搜索页状态
+class SearchState {
+  const SearchState({
+    this.keyword = '',
+    this.sort = SearchSort.hot,
+    this.items = const [],
+    this.total = 0,
+    this.page = 1,
+    this.isSearching = false,
+    this.isLoadingMore = false,
+    this.searched = false,
+    this.hotWords = const [],
+    this.history = const [],
+  });
+
+  final String keyword;
+  final SearchSort sort;
+  final List<VideoItem> items;
+  final int total;
+  final int page;
+  final bool isSearching;
+  final bool isLoadingMore;
+
+  /// 是否已执行过搜索（区分默认页与结果页）
+  final bool searched;
+
+  /// 热搜榜（进入页面时加载）
+  final List<String> hotWords;
+
+  /// 本地搜索历史（最新在前）
+  final List<String> history;
+
+  bool get hasMore => items.length < total;
+
+  SearchState copyWith({
+    String? keyword,
+    SearchSort? sort,
+    List<VideoItem>? items,
+    int? total,
+    int? page,
+    bool? isSearching,
+    bool? isLoadingMore,
+    bool? searched,
+    List<String>? hotWords,
+    List<String>? history,
+  }) =>
+      SearchState(
+        keyword: keyword ?? this.keyword,
+        sort: sort ?? this.sort,
+        items: items ?? this.items,
+        total: total ?? this.total,
+        page: page ?? this.page,
+        isSearching: isSearching ?? this.isSearching,
+        isLoadingMore: isLoadingMore ?? this.isLoadingMore,
+        searched: searched ?? this.searched,
+        hotWords: hotWords ?? this.hotWords,
+        history: history ?? this.history,
+      );
+}
+
+class SearchNotifier extends StateNotifier<SearchState> {
+  SearchNotifier() : super(SearchState(history: SearchHistoryStore.I.history));
+
+  /// 加载热搜榜（静默失败，空列表兜底）
+  Future<void> loadHot() async {
+    try {
+      final words = await SearchService.hotWords();
+      state = state.copyWith(hotWords: words);
+    } catch (_) {}
+  }
+
+  /// 执行搜索（换关键词或排序时全量重来）
+  Future<void> search(String keyword, {SearchSort? sort}) async {
+    final word = keyword.trim();
+    if (word.isEmpty) return;
+    final nextSort = sort ?? state.sort;
+    state = state.copyWith(
+      keyword: word,
+      sort: nextSort,
+      isSearching: true,
+      searched: true,
+      items: const [],
+      total: 0,
+      page: 1,
+    );
+    // 写入本地历史（去重置顶，最多 10 条）
+    await SearchHistoryStore.I.add(word);
+    state = state.copyWith(history: SearchHistoryStore.I.history);
+    try {
+      final page =
+          await SearchService.search(word, sort: nextSort.apiValue);
+      state = state.copyWith(
+        items: page.items,
+        total: page.total,
+        isSearching: false,
+        page: 1,
+      );
+    } catch (_) {
+      state = state.copyWith(isSearching: false);
+    }
+  }
+
+  /// 触底加载更多
+  Future<void> loadMore() async {
+    if (!state.hasMore || state.isLoadingMore || state.isSearching) return;
+    state = state.copyWith(isLoadingMore: true);
+    try {
+      final page = await SearchService.search(
+        state.keyword,
+        sort: state.sort.apiValue,
+        page: state.page + 1,
+      );
+      state = state.copyWith(
+        items: [...state.items, ...page.items],
+        total: page.total,
+        isLoadingMore: false,
+        page: state.page + 1,
+      );
+    } catch (_) {
+      state = state.copyWith(isLoadingMore: false);
+    }
+  }
+
+  /// 删除单条历史
+  Future<void> removeHistory(String word) async {
+    await SearchHistoryStore.I.remove(word);
+    state = state.copyWith(history: SearchHistoryStore.I.history);
+  }
+
+  /// 清空历史
+  Future<void> clearHistory() async {
+    await SearchHistoryStore.I.clear();
+    state = state.copyWith(history: const []);
+  }
+}
+
+final searchProvider =
+    StateNotifierProvider<SearchNotifier, SearchState>((ref) => SearchNotifier());