feat:增加加载中显示

lib/provider/blog.dart

@@ -0,0 +1,204 @@
+import 'package:blog_app/models/common.dart';
+import 'package:flutter/foundation.dart';
+import 'package:blog_app/apis/blog.dart';
+import 'package:blog_app/models/blog.dart';
+
+class BlogProvider with ChangeNotifier {
+  List<Blog> blogList = [];
+  List<BlogCategory> categoryList = [];
+  Blog currentBlog = Blog(
+    id: 0,
+    title: '',
+    topValue: 0,
+    isGreat: false,
+    category: '',
+    summary: '',
+    content: '',
+    wordCount: 0,
+    readDuration: 0,
+    visitCount: 0,
+    createTime: '',
+    updateTime: '',
+  );
+  int currentPage = 1;
+  final int pageSize = 5;
+  bool hasMore = true;
+  bool isLoading = false;
+  int currentYear = DateTime.now().year;
+  String? error;
+
+  late List<ChartData> approvedStats = [];
+  late List<ChartData> visitStats = [];
+  late List<ChartData> visitRankStats = [];
+  late List<ChartData> categoryStats = [];
+  late List<ChartData> readRankStats = [];
+  late BlogStats overviewStats = BlogStats(
+    blogCount: 0,
+    categoryCount: 0,
+    greatCount: 0,
+    visitCount: 0,
+    wordCount: 0,
+  );
+
+  Future<void> queryBlogByPage({bool isRefresh = true}) async {
+    if (isLoading) return;
+
+    try {
+      isLoading = true;
+      error = null;
+      notifyListeners();
+
+      // 如果是刷新，重置页码
+      if (isRefresh) {
+        currentPage = 1;
+      }
+
+      final result = await queryBlogByPageApi(currentPage, pageSize);
+
+      // 更新数据
+      if (isRefresh) {
+        blogList = result.records;
+      } else {
+        blogList.addAll(result.records);
+      }
+
+      // 判断是否还有更多数据
+      hasMore = result.current < result.pages;
+      if (hasMore) {
+        currentPage++;
+      }
+    } catch (e) {
+      error = '加载数据失败: $e';
+      debugPrint('加载数据失败: $e');
+    } finally {
+      isLoading = false;
+      notifyListeners();
+    }
+  }
+
+  Future<void> refreshBlogCategory() async {
+    if (isLoading) return;
+
+    try {
+      isLoading = true;
+      error = null;
+      categoryList = [];
+      notifyListeners();
+
+      final result = await queryBlogCategoryApi();
+      categoryList = result;
+    } catch (e) {
+      error = '加载数据失败: $e';
+      debugPrint('加载数据失败: $e');
+    } finally {
+      isLoading = false;
+      notifyListeners();
+    }
+  }
+
+  Future<void> refreshBlogStats() async {
+    if (isLoading) return;
+
+    try {
+      isLoading = true;
+      error = null;
+      notifyListeners();
+
+      final approvedResult = await queryBlogApprovedStatsApi(currentYear);
+      final visitResult = await queryBlogVisitStatsApi(currentYear);
+      final visitRankResult = await queryBlogVisitRankStatsApi();
+      final categoryResult = await queryBlogCategoryStatsApi();
+      final readRankResult = await queryBlogReadRankStatsApi();
+      final overviewResult = await queryBlogOverviewStatsApi();
+
+      approvedStats = approvedResult;
+      visitStats = visitResult;
+      visitRankStats = visitRankResult;
+      categoryStats = categoryResult;
+      readRankStats = readRankResult;
+      overviewStats = overviewResult;
+    } catch (e) {
+      error = '加载数据失败: $e';
+      debugPrint('加载数据失败: $e');
+    } finally {
+      isLoading = false;
+      notifyListeners();
+    }
+  }
+
+  Future<void> refreshBlogByCategory(String category) async {
+    if (isLoading) return;
+
+    try {
+      isLoading = true;
+      error = null;
+      blogList = [];
+      notifyListeners();
+
+      final result = await queryBlogByConditionApi(category, null, null);
+      blogList = result;
+    } catch (e) {
+      error = '加载数据失败: $e';
+      debugPrint('加载数据失败: $e');
+    } finally {
+      isLoading = false;
+      notifyListeners();
+    }
+  }
+
+  Future<void> refreshBlogByYear() async {
+    if (isLoading) return;
+
+    try {
+      isLoading = true;
+      error = null;
+      blogList = [];
+      notifyListeners();
+
+      final result = await queryBlogByConditionApi(null, null, currentYear);
+      blogList = result;
+    } catch (e) {
+      error = '加载数据失败: $e';
+      debugPrint('加载数据失败: $e');
+    } finally {
+      isLoading = false;
+      notifyListeners();
+    }
+  }
+
+  Future<void> refreshBlogList() async {
+    await queryBlogByPage(isRefresh: true);
+  }
+
+  Future<void> queryBlogById(int blogId) async {
+    if (isLoading) return;
+
+    try {
+      isLoading = true;
+      error = null;
+      notifyListeners();
+
+      final result = await queryBlogByIdApi(blogId);
+      currentBlog = result;
+    } catch (e) {
+      error = '加载数据失败: $e';
+      debugPrint('加载数据失败: $e');
+    } finally {
+      isLoading = false;
+      notifyListeners();
+    }
+  }
+
+  // 加载更多
+  Future<void> loadMoreBlogList() async {
+    if (hasMore && !isLoading) {
+      await queryBlogByPage(isRefresh: false);
+    }
+  }
+
+  // 清除错误
+  void clearError() {
+    error = null;
+    notifyListeners();
+  }
+}