89 lines
2.6 KiB
Dart
89 lines
2.6 KiB
Dart
import 'novel_structure.dart';
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/// 预加载章节数据传输对象
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/// 专门用于阅读器预加载功能，包含章节列表和对应的场景内容
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class ChaptersForPreloadDto {
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const ChaptersForPreloadDto({
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required this.chapters,
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required this.scenesByChapter,
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});
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/// 从JSON创建实例
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factory ChaptersForPreloadDto.fromJson(Map<String, dynamic> json) {
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// 解析章节列表
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final List<Chapter> chaptersList = [];
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if (json['chapters'] != null && json['chapters'] is List) {
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chaptersList.addAll(
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(json['chapters'] as List<dynamic>)
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.map((chapterJson) => Chapter.fromJson(chapterJson as Map<String, dynamic>))
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.toList(),
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);
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}
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// 解析按章节分组的场景
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final Map<String, List<Scene>> scenesMap = {};
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if (json['scenesByChapter'] != null && json['scenesByChapter'] is Map) {
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final rawScenesMap = json['scenesByChapter'] as Map<String, dynamic>;
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for (final entry in rawScenesMap.entries) {
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final chapterId = entry.key;
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final scenesList = <Scene>[];
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if (entry.value is List) {
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scenesList.addAll(
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(entry.value as List<dynamic>)
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.map((sceneJson) => Scene.fromJson(sceneJson as Map<String, dynamic>))
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.toList(),
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);
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}
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scenesMap[chapterId] = scenesList;
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}
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}
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return ChaptersForPreloadDto(
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chapters: chaptersList,
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scenesByChapter: scenesMap,
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);
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}
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/// 章节列表，按顺序排列
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final List<Chapter> chapters;
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/// 按章节ID分组的场景列表
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/// Key: 章节ID
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/// Value: 该章节的场景列表（按sequence排序）
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final Map<String, List<Scene>> scenesByChapter;
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/// 获取章节总数
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int get chapterCount => chapters.length;
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/// 获取场景总数
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int get totalSceneCount {
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return scenesByChapter.values
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.map((scenes) => scenes.length)
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.fold(0, (sum, count) => sum + count);
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}
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/// 检查是否包含指定章节的数据
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bool containsChapter(String chapterId) {
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return chapters.any((chapter) => chapter.id == chapterId);
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}
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/// 转换为JSON
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Map<String, dynamic> toJson() {
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return {
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'chapters': chapters.map((chapter) => chapter.toJson()).toList(),
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'scenesByChapter': scenesByChapter.map(
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(chapterId, scenes) => MapEntry(
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chapterId,
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scenes.map((scene) => scene.toJson()).toList(),
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),
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),
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};
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}
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@override
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String toString() {
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return 'ChaptersForPreloadDto(chapterCount: $chapterCount, totalSceneCount: $totalSceneCount)';
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}
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} |