polaris/ui/lib/providers/activity.dart

import 'dart:async';

import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:ui/providers/APIs.dart';
import 'package:ui/providers/server_response.dart';

var activitiesDataProvider = AsyncNotifierProvider.autoDispose<ActivityData, List<Activity>>(
        ActivityData.new);

class ActivityData extends AutoDisposeAsyncNotifier<List<Activity>> {
  @override
  FutureOr<List<Activity>> build() async {
    final dio = await APIs.getDio();
    var resp = await dio.get(APIs.activityUrl);
    final sp = ServerResponse.fromJson(resp.data);
    if (sp.code != 0) {
      throw sp.message;
    }
    List<Activity> activities = List.empty(growable: true);
    for (final a in sp.data as List) {
      activities.add(Activity.fromJson(a));
    }
    return activities;
  }

  Future<void> deleteActivity(int id) async {
    final dio = await APIs.getDio();
    var resp = await dio.delete("${APIs.activityUrl}$id");
    final sp = ServerResponse.fromJson(resp.data);
    if (sp.code != 0) {
      throw sp.message;
    }
    ref.invalidateSelf();
  }
}

class Activity {
    Activity({
        required this.id,
        required this.seriesId,
        required this.episodeId,
        required this.sourceTitle,
        required this.date,
        required this.targetDir,
        required this.completed,
        required this.saved,
        required this.inBackgroud,
    });

    final int? id;
    final int? seriesId;
    final int? episodeId;
    final String? sourceTitle;
    final DateTime? date;
    final String? targetDir;
    final bool? completed;
    final String? saved;
    final bool? inBackgroud;

    factory Activity.fromJson(Map<String, dynamic> json){ 
        return Activity(
            id: json["id"],
            seriesId: json["series_id"],
            episodeId: json["episode_id"],
            sourceTitle: json["source_title"],
            date: DateTime.tryParse(json["date"] ?? ""),
            targetDir: json["target_dir"],
            completed: json["completed"],
            saved: json["saved"],
            inBackgroud: json["in_backgroud"],
        );
    }

}