japp_flutter/lib/features/challenge/view_models/challenge_detail_vm.dart

import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:japp_flutter/core/models/challenge_model.dart';
import 'package:japp_flutter/core/proviers/repository_providers.dart';
import 'package:japp_flutter/core/repositories/challenge_repository.dart';



final challengeDetailProvider = AsyncNotifierProvider.autoDispose<ChallengeDetailViewModel, ChallengeModel?>(
  ChallengeDetailViewModel.new,
);


class ChallengeDetailViewModel extends AutoDisposeAsyncNotifier<ChallengeModel?> {
  ChallengeRepository get _repository => ref.read(challengeRepositoryProvider);

  @override
  Future<ChallengeModel?> build() async {
    return null;
  }

  Future<void> loadChallenge(int challengeId) async {
    state = const AsyncLoading();
    state = await AsyncValue.guard(() => _repository.getChallengeById(challengeId));
  }

  // 手动刷新用
  Future<void> refreshChallenge(int challengeId) async {
    await loadChallenge(challengeId);
  }
}