TourIAm/TIAM.Models/PageViewModels/DriverManageTransfersPageModel.cs

using AyCode.Blazor.Models.ViewModels;
using Newtonsoft.Json;
using TIAM.Core.Enums;
using TIAM.Entities.Transfers;

namespace TIAM.Models.PageViewModels;

public class DriverManageTransfersPageModel : AcPageViewModelBase
{
    private readonly object _forLock = new();
    private const int AppointmentWaitingHours = 3;

    public int UnreadedMessagesCount { get; set; }
    public List<Transfer> Transfers { get; set; } = [];

    private readonly List<Transfer> _upcomings = [];
    private readonly List<Transfer> _problems = [];


    /// <summary>
    /// Value set on the client side!
    /// </summary>
    [JsonIgnore]
    public List<Transfer> Upcomings
    {
        get
        {
            lock (_forLock)
            {
                if (_upcomings.Count > 0) return _upcomings;

                var localNow = DateTime.Now;
                var localNowSubstractWaitingHour = localNow.AddHours(-1 * AppointmentWaitingHours);

                _upcomings.AddRange(Transfers.Where(x => x.Appointment >= localNowSubstractWaitingHour));
            }

            return _upcomings;
        }
    }

    /// <summary>
    /// Value set on the client side!
    /// </summary>
    [JsonIgnore]
    public List<Transfer> Problems
    {
        get
        {
            lock (_forLock)
            {
                if (_problems.Count > 0) return _problems;

                var localNow = DateTime.Now;
                var localNowAddedWaitingHour = localNow.AddHours(AppointmentWaitingHours);

                _problems.AddRange(Transfers.Where(x => x.Appointment < localNowAddedWaitingHour && x.TransferStatusType != TransferStatusType.Finished));
            }

            return _problems;
        }
    }

    public DriverManageTransfersPageModel()
    {
    }

    public DriverManageTransfersPageModel(IEnumerable<Transfer> transfers, int unreadedMessagesCount)
    {
        Initialize(transfers, unreadedMessagesCount);
    }

    public void Initialize(DriverManageTransfersPageModel? driverManageTransfersPageModel)
    {
        if (driverManageTransfersPageModel == null) return;

        Initialize(driverManageTransfersPageModel.Transfers, driverManageTransfersPageModel.UnreadedMessagesCount);
    }

    public void Initialize(IEnumerable<Transfer> transfers, int unreadedMessagesCount)
    {
        lock (_forLock)
        {
            Transfers.Clear();
            Transfers.AddRange(transfers.Where(t => t.TransferStatusType != TransferStatusType.UserCanceled && t.TransferStatusType != TransferStatusType.AdminDenied));

            Upcomings.Clear();
            Problems.Clear();
        }

        UnreadedMessagesCount = unreadedMessagesCount;
    }
}