add

2026-10-15 20:36:59 +08:00
commit 6bf949949c
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+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:image_picker/image_picker.dart';
+
+import '../core/network/api_exception.dart';
+import '../services/upload_service.dart';
+
+/// 上传发布流程步骤：选视频 → 填信息 → 发布中 → 完成
+enum UploadStep { pick, edit, publishing, done }
+
+/// 上传发布状态（《03-接口文档》5.5/5.6 三步链路）
+class UploadState {
+  const UploadState({
+    this.step = UploadStep.pick,
+    this.file,
+    this.fileSize = 0,
+    this.progress = 0,
+    this.result,
+    this.error = '',
+  });
+
+  final UploadStep step;
+  final XFile? file; // 已选择的视频
+  final int fileSize; // 字节
+  final int progress; // 上传进度 0-100
+  final PublishResult? result;
+  final String error; // 发布失败文案（停留在 edit 步骤展示）
+
+  bool get publishing => step == UploadStep.publishing;
+
+  UploadState copyWith({
+    UploadStep? step,
+    XFile? file,
+    int? fileSize,
+    int? progress,
+    PublishResult? result,
+    String? error,
+  }) =>
+      UploadState(
+        step: step ?? this.step,
+        file: file ?? this.file,
+        fileSize: fileSize ?? this.fileSize,
+        progress: progress ?? this.progress,
+        result: result ?? this.result,
+        error: error ?? this.error,
+      );
+}
+
+class UploadNotifier extends StateNotifier<UploadState> {
+  UploadNotifier() : super(const UploadState());
+
+  final _picker = ImagePicker();
+
+  /// 从相册选择视频 → 进入填信息步骤
+  Future<void> pickVideo() async {
+    final file = await _picker.pickVideo(source: ImageSource.gallery);
+    if (file == null) return;
+    final size = await file.length();
+    state = UploadState(step: UploadStep.edit, file: file, fileSize: size);
+  }
+
+  /// 重新选择（回到选视频步骤）
+  void reset() => state = const UploadState();
+
+  /// 发布：获取凭证 → 上传文件（进度） → 创建视频
+  Future<void> submit({
+    required String title,
+    String description = '',
+    required int categoryId,
+    List<String> tags = const [],
+  }) async {
+    final file = state.file;
+    if (file == null || state.publishing) return;
+    state = state.copyWith(step: UploadStep.publishing, progress: 0, error: '');
+    try {
+      final token = await UploadService.fetchUploadToken(
+        fileName: file.name,
+        fileSize: state.fileSize,
+      );
+      await UploadService.uploadFile(
+        objectKey: token.objectKey,
+        filePath: file.path,
+        fileName: file.name,
+        onProgress: (sent, total) {
+          if (total > 0) {
+            state = state.copyWith(progress: (sent * 100) ~/ total);
+          }
+        },
+      );
+      final result = await UploadService.publish(
+        objectKey: token.objectKey,
+        title: title,
+        description: description,
+        categoryId: categoryId,
+        tags: tags,
+      );
+      state = state.copyWith(step: UploadStep.done, result: result);
+    } on ApiException catch (e) {
+      // 失败回到表单步骤，保留已填内容，展示服务端文案
+      state = state.copyWith(step: UploadStep.edit, error: e.message);
+    } catch (_) {
+      state = state.copyWith(step: UploadStep.edit, error: '网络异常，请稍后重试');
+    }
+  }
+}
+
+/// 上传发布（autoDispose：离开页面即重置流程）
+final uploadProvider =
+    StateNotifierProvider.autoDispose<UploadNotifier, UploadState>(
+  (ref) => UploadNotifier(),
+);
+
+/// 分类列表（发布表单用）
+final uploadCategoriesProvider =
+    FutureProvider.autoDispose<List<VideoCategory>>(
+  (ref) => UploadService.fetchCategories(),
+);