PalladiumWallet/src/App/ViewModels/MainWindowViewModel.Contacts.cs

using System.Collections.ObjectModel;
using System.Linq;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using PalladiumWallet.Core.Storage;

namespace PalladiumWallet.App.ViewModels;

public partial class MainWindowViewModel
{
    public ObservableCollection<ContactEntry> Contacts { get; } = [];

    [ObservableProperty]
    private ContactEntry? selectedContactInList;

    /// <summary>Contact selected in the Send panel's ComboBox: fills SendTo.</summary>
    [ObservableProperty]
    private ContactEntry? sendToContact;

    partial void OnSendToContactChanged(ContactEntry? value)
    {
        if (value is not null)
            SendTo = value.Address;
    }

    [ObservableProperty]
    private string newContactName = "";

    [ObservableProperty]
    private string newContactAddress = "";

    [RelayCommand]
    private void AddContact()
    {
        var name = NewContactName.Trim();
        var addr = NewContactAddress.Trim();
        if (string.IsNullOrEmpty(name) || string.IsNullOrEmpty(addr)) return;
        Contacts.Add(new ContactEntry(name, addr));
        NewContactName = NewContactAddress = "";
        PersistContacts();
    }

    [RelayCommand]
    private void RemoveSelectedContact()
    {
        if (SelectedContactInList is { } c)
        {
            Contacts.Remove(c);
            SelectedContactInList = null;
            PersistContacts();
        }
    }

    private void PersistContacts()
    {
        if (_doc is null || _walletPath is null) return;
        _doc.Contacts = Contacts
            .Select(c => new StoredContact { Name = c.Name, Address = c.Address })
            .ToList();
        WalletStore.Save(_doc, _walletPath, _password);
    }

    private void LoadContacts()
    {
        Contacts.Clear();
        if (_doc is null) return;
        foreach (var c in _doc.Contacts)
            Contacts.Add(new ContactEntry(c.Name, c.Address));
    }
}