117 lines
3.5 KiB
Dart
117 lines
3.5 KiB
Dart
import 'package:flutter_riverpod/flutter_riverpod.dart';
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import 'package:image_picker/image_picker.dart';
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import '../core/network/api_exception.dart';
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import '../services/upload_service.dart';
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/// 上传发布流程步骤：选视频 → 填信息 → 发布中 → 完成
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enum UploadStep { pick, edit, publishing, done }
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/// 上传发布状态（《03-接口文档》5.5/5.6 三步链路）
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class UploadState {
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const UploadState({
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this.step = UploadStep.pick,
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this.file,
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this.fileSize = 0,
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this.progress = 0,
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this.result,
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this.error = '',
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});
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final UploadStep step;
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final XFile? file; // 已选择的视频
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final int fileSize; // 字节
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final int progress; // 上传进度 0-100
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final PublishResult? result;
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final String error; // 发布失败文案（停留在 edit 步骤展示）
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bool get publishing => step == UploadStep.publishing;
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UploadState copyWith({
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UploadStep? step,
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XFile? file,
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int? fileSize,
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int? progress,
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PublishResult? result,
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String? error,
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}) =>
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UploadState(
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step: step ?? this.step,
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file: file ?? this.file,
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fileSize: fileSize ?? this.fileSize,
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progress: progress ?? this.progress,
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result: result ?? this.result,
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error: error ?? this.error,
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);
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}
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class UploadNotifier extends StateNotifier<UploadState> {
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UploadNotifier() : super(const UploadState());
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final _picker = ImagePicker();
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/// 从相册选择视频 → 进入填信息步骤
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Future<void> pickVideo() async {
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final file = await _picker.pickVideo(source: ImageSource.gallery);
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if (file == null) return;
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final size = await file.length();
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state = UploadState(step: UploadStep.edit, file: file, fileSize: size);
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}
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/// 重新选择（回到选视频步骤）
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void reset() => state = const UploadState();
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/// 发布：获取凭证 → 上传文件（进度） → 创建视频
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Future<void> submit({
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required String title,
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String description = '',
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required int categoryId,
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List<String> tags = const [],
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}) async {
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final file = state.file;
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if (file == null || state.publishing) return;
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state = state.copyWith(step: UploadStep.publishing, progress: 0, error: '');
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try {
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final token = await UploadService.fetchUploadToken(
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fileName: file.name,
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fileSize: state.fileSize,
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);
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await UploadService.uploadFile(
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objectKey: token.objectKey,
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filePath: file.path,
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fileName: file.name,
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onProgress: (sent, total) {
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if (total > 0) {
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state = state.copyWith(progress: (sent * 100) ~/ total);
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}
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},
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);
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final result = await UploadService.publish(
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objectKey: token.objectKey,
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title: title,
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description: description,
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categoryId: categoryId,
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tags: tags,
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);
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state = state.copyWith(step: UploadStep.done, result: result);
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} on ApiException catch (e) {
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// 失败回到表单步骤，保留已填内容，展示服务端文案
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state = state.copyWith(step: UploadStep.edit, error: e.message);
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} catch (_) {
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state = state.copyWith(step: UploadStep.edit, error: '网络异常，请稍后重试');
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}
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}
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}
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/// 上传发布（autoDispose：离开页面即重置流程）
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final uploadProvider =
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StateNotifierProvider.autoDispose<UploadNotifier, UploadState>(
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(ref) => UploadNotifier(),
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);
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/// 分类列表（发布表单用）
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final uploadCategoriesProvider =
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FutureProvider.autoDispose<List<VideoCategory>>(
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(ref) => UploadService.fetchCategories(),
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);
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