feat(category): 分类频道接入榜单快照

lib/core/data/models/category_ranking.dart

@@ -0,0 +1,67 @@
+// Author: fruit.com.cn
+
+import 'drama.dart';
+import 'locale_text.dart';
+
+/// 服务端推荐榜快照；顺序和排名均不可在客户端重算。
+class CategoryRanking {
+  const CategoryRanking({
+    required this.id,
+    required this.code,
+    required this.revision,
+    required this.entries,
+    this.locales = const {},
+    this.generatedAt,
+  });
+
+  final String id;
+  final String code;
+  final String revision;
+  final Map<String, String> locales;
+  final DateTime? generatedAt;
+  final List<CategoryRankingEntry> entries;
+
+  /// 解析 `GET /app/categories/{id}/ranking`。
+  factory CategoryRanking.fromJson(Map<String, dynamic> json) {
+    final rawList = json['list'];
+    final entries = rawList is List
+        ? rawList
+              .whereType<Map>()
+              .map(
+                (item) =>
+                    CategoryRankingEntry.fromJson(item.cast<String, dynamic>()),
+              )
+              .toList(growable: false)
+        : const <CategoryRankingEntry>[];
+    return CategoryRanking(
+      id: (json['id'] ?? '').toString(),
+      code: json['code'] as String? ?? '',
+      revision: (json['revision'] ?? '1').toString(),
+      locales: localeMap(json['locales']),
+      generatedAt: DateTime.tryParse(json['generatedAt'] as String? ?? ''),
+      entries: entries,
+    );
+  }
+}
+
+/// 推荐榜中的一部短剧及其服务端排名。
+class CategoryRankingEntry {
+  const CategoryRankingEntry({required this.rank, required this.drama});
+
+  final int rank;
+  final Drama drama;
+
+  factory CategoryRankingEntry.fromJson(Map<String, dynamic> json) {
+    final rawDrama = json['drama'];
+    return CategoryRankingEntry(
+      rank: (json['rank'] as num?)?.toInt() ?? 0,
+      drama: Drama.fromCardJson(
+        rawDrama is Map<String, dynamic>
+            ? rawDrama
+            : rawDrama is Map
+            ? rawDrama.cast<String, dynamic>()
+            : const <String, dynamic>{},
+      ),
+    );
+  }
+}

lib/core/data/models/content_category.dart

@@ -7,10 +7,19 @@ class ContentCategory {
   const ContentCategory({
     required this.id,
     required this.name,
+    this.code = '',
+    this.layoutType = gridLayout,
+    this.revision = '1',
     this.locales = const {},
   });
 
+  static const String gridLayout = 'GRID';
+  static const String rankingLayout = 'RANKING';
+
   final String id;
+  final String code;
+  final String layoutType;
+  final String revision;
 
   /// 中文名称，与 locales 里的 zh 相同。
   final String name;
@@ -20,9 +29,18 @@ class ContentCategory {
   factory ContentCategory.fromJson(Map<String, dynamic> json) {
     final locales = localeMap(json['locales']);
     final name = json['name'] as String? ?? locales['zh'] ?? '';
-    return ContentCategory(id: (json['id'] ?? '').toString(), name: name, locales: locales);
+    return ContentCategory(
+      id: (json['id'] ?? '').toString(),
+      name: name,
+      code: json['code'] as String? ?? '',
+      layoutType: json['layoutType'] as String? ?? gridLayout,
+      revision: (json['revision'] ?? '1').toString(),
+      locales: locales,
+    );
   }
 
+  bool get isRanking => layoutType == rankingLayout;
+
   /// 按界面语言取名称。缺对应语言时回落到中文。
   String localizedName(String languageCode) {
     return localizedText(languageCode, name, locales);