/// 单据附件操作权限
///
/// 来源: GET /OA/GetBillFileRights?billId=AE
/// SPC_ID 格式: AE:1,1,1,1,1 (新增,下载,删除,查看,终审)
class BillFileRights {
  final bool canAdd;
  final bool canDownload;
  final bool canDelete;
  final bool canView;
  final bool canFinalApprove;

  const BillFileRights({
    required this.canAdd,
    required this.canDownload,
    required this.canDelete,
    required this.canView,
    required this.canFinalApprove,
  });

  factory BillFileRights.fromJson(Map<String, dynamic> json) => BillFileRights(
    canAdd: json['canAdd'] == true,
    canDownload: json['canDownload'] == true,
    canDelete: json['canDelete'] == true,
    canView: json['canView'] == true,
    canFinalApprove: json['canFinalApprove'] == true,
  );

  /// 所有权限都为 false 的初始值
  static const none = BillFileRights(
    canAdd: false,
    canDownload: false,
    canDelete: false,
    canView: false,
    canFinalApprove: false,
  );

  /// 创建页：需要新增 + 查看权限
  bool get canManageAttachments => canAdd && canView;

  /// 详情页：需要查看 + 下载权限
  bool get canBrowseAttachments => canView && canDownload;
}