GazpromApp/ViewModels/Basic/EquipmentViewModel.cs

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using CommunityToolkit.Mvvm.ComponentModel;
using GazpromApp.Models;
using GazpromApp.Utils;

namespace GazpromApp.ViewModels;

public partial class EquipmentViewModel : ViewModelBase
{
    [ObservableProperty]
    private string? _name;
    
    [ObservableProperty]
    private string? _description;
    
    [ObservableProperty]
    private ImageViewModel? _image;
    
    public ObservableCollection<PropertyViewModel> Properties { get; set; }

    public ObservableCollection<InspectionViewModel> Inspections { get; set; }
    
    [ObservableProperty]
    private string _nearestInspection;

    public EquipmentViewModel()
    {
        Name = string.Empty;
        Description = string.Empty;
        Image = null;
        Properties = [];
        Inspections = [];
        NearestInspection = "Нету инспекций";
    }

    public EquipmentViewModel(Equipment equipment)
    {
        Name = equipment.Name;
        Description = equipment.Description;
        Image = new ImageViewModel(equipment.Image ?? new Image());
        Properties = new ObservableCollection<PropertyViewModel>(equipment.Properties.Select(e => new PropertyViewModel(e)));
        
        List<DateTime[]> times = (equipment.Inspections.Select(e => new InspectionViewModel(e)))
            .Select(e => e.GetNearestDates())
            .ToList();
        
        Inspections = new ObservableCollection<InspectionViewModel>(equipment.Inspections
            .Select((e, i) => new InspectionViewModel(e) { InspectionDate = times[i][0] }));
        
        NearestInspection = times
            .Where(e => e[1] > DateTime.Now)
            .Select(e => e[1])
            .OrderBy(e => e)
            .FirstOrDefault()
            .ToLongDateString();

        if (Inspections.Count == 0) NearestInspection = "Нету инспекций";
    }

    public Equipment GetEquipment()
    {
        return new Equipment()
        {
            Name = Name,
            Description = Description,
            Image = Image?.GetImage(),
            Inspections = Inspections.Select(e => e.GetInspection()).ToList(),
        };
    }
}