MultiTerm/MultiTerm.Core/ViewModel/ShellViewModel.cs

using Common.StartupHelpers;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using MultiTerm.Core.Common;
using System.Collections.ObjectModel;

namespace MultiTerm.Core.ViewModel;

public partial class ShellViewModel : ObservableObject
{
    private readonly IAbstractFactory<SendReceiveViewModel> sendReceiveViewModelFactory;

    [ObservableProperty]
    private string title = "ShellView Test";

    [ObservableProperty]
    private ObservableCollection<ITerminalViewModel> terminalViewModels = new();

    [ObservableProperty]
    private ITerminalViewModel? selectedTerminalViewModel;

    #region Settings Menu Bar
    // TODO Initialize from File
    [ObservableProperty]
    private NewlineSeparatorType defaultReceiveNewlineSeparator = NewlineSeparatorType.None;

    // TODO Initialize from File
    [ObservableProperty]
    private NewlineSeparatorType defaultSendNewlineSeparator = NewlineSeparatorType.None;
    #endregion

    public ShellViewModel(IAbstractFactory<SendReceiveViewModel> sendReceiveViewModelFactory)
    {
        this.sendReceiveViewModelFactory = sendReceiveViewModelFactory;
        // create a new terminal
        this.AppendTerminal(this.sendReceiveViewModelFactory.Create());
    }

    public void AppendTerminal(ITerminalViewModel newTerminal)
    {
        // guard null value
        if(newTerminal == null) { return; }

        // add to collection and register closing event handler
        this.TerminalViewModels.Add(newTerminal);
        newTerminal.ClosingEvent += Terminal_ClosingEvent;
        // set as selected
        this.SelectedTerminalViewModel = newTerminal;
    }

    private void Terminal_ClosingEvent(object? sender, EventArgs e)
    {
        if(sender is not ITerminalViewModel tvm) { throw new ArgumentException(nameof(sender)); }
        this.RemoveTerminal(tvm);
    }

    public void RemoveTerminal(ITerminalViewModel terminalToRemove)
    {
        // guard null value
        if(terminalToRemove == null) { return; }

        this.TerminalViewModels.Remove(terminalToRemove);
    }

    partial void OnDefaultReceiveNewlineSeparatorChanged(NewlineSeparatorType value)
    {
        Console.WriteLine($"Changed to {value}");
    }

    partial void OnDefaultSendNewlineSeparatorChanged(NewlineSeparatorType value)
    {
        Console.WriteLine($"Changed Send to {value}");
    }

    [RelayCommand]
    public void TestButtonClicked()
    {
        this.DefaultReceiveNewlineSeparator = NewlineSeparatorType.CR_LF;
    }

}