GazpromApp/ViewModels/Basic/PropertyViewModel.cs

using System;
using System.Collections.ObjectModel;
using System.Linq;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using CommunityToolkit.Mvvm.Messaging;
using GazpromApp.Messages;
using GazpromApp.Models;

namespace GazpromApp.ViewModels;


public partial class PropertyViewModel : ViewModelBase
{
    public ViewModelBase? Parent { get; init; }
    
    private Property Property { get; }

    [ObservableProperty]
    private string _name;
    
    [ObservableProperty]
    private string _value;
    
    [ObservableProperty]
    private DateTime _creationDate;
    
    public ObservableCollection<PropertyViewModel> Properties { get; set; }
    
    // Visual and other properties
    
    [ObservableProperty]
    private bool _isEditing;

    [RelayCommand]
    private void AddProperty() => Properties.Add(new PropertyViewModel() {Parent = this});
    
    [RelayCommand]
    private void RemoveProperty() => WeakReferenceMessenger.Default.Send(new RemovePropertyMessage(this));
    
    [RelayCommand]
    private void EditProperty() => IsEditing = !IsEditing;

    private void RemoveProperty(object sender, RemovePropertyMessage msg)
    {
        if (Properties.Contains(msg.Property))
            Properties.Remove(msg.Property);
    }
    
    public Property GetProperty(Property? parent = null)
    {
        Property.Name = Name;
        Property.Value = Value;
        Property.CreationDate = CreationDate;
        Property.Parent = parent;
        Property.Properties = Properties.Select(e => e.GetProperty(Property)).ToList();
        return Property;
    }
    
    public PropertyViewModel()
    {
        Name = "Имя свойства";
        Value = "Значение свойства";
        CreationDate = DateTime.Now;
        Properties = [];
        Parent = null;
        Property = new Property();
        
        WeakReferenceMessenger.Default.Register<RemovePropertyMessage>(this, RemoveProperty);
    }
    
    public PropertyViewModel(Property property, PropertyViewModel? parent = null)
    {
        Name = property.Name;
        Value = property.Value;
        CreationDate = property.CreationDate;
        Properties = new ObservableCollection<PropertyViewModel>(
            property.Properties.Select(e => new PropertyViewModel(e, this)));
        Parent = property.Parent is null ? null : parent;
        Property = property;
        
        WeakReferenceMessenger.Default.Register<RemovePropertyMessage>(this, RemoveProperty);
    }

    public PropertyViewModel(PropertyViewModel property)
    {
        Name = "Имя свойства";
        Value = "Значение свойства";
        Properties = [];
        Parent = property;
        Property = new Property();
        
        WeakReferenceMessenger.Default.Register<RemovePropertyMessage>(this, RemoveProperty);
    }
}