CodeMerger/ViewModels/LogViewModel.cs

using System.Collections.ObjectModel;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using System.Text;
using System.Windows;
using CodeMerger.Models;

namespace CodeMerger.ViewModels;

public partial class LogViewModel : ObservableObject
{
    [ObservableProperty]
    private ObservableCollection<LogMessage> logMessages = new();

    public void AddLog(string message, LogLevel level = LogLevel.Info)
    {
        App.Current.Dispatcher.Invoke(() =>
        {
            LogMessages.Add(new LogMessage(message, level));
        });
    }

    public void Clear()
    {
        LogMessages.Clear();
    }

    [RelayCommand]
    private void CopyToClipboard()
    {
        var sb = new StringBuilder();
        foreach (var message in LogMessages)
        {
            sb.AppendLine($"[{message.Timestamp:HH:mm:ss.fff}] [{message.Level}] {message.Message}");
        }

        try
        {
            Clipboard.SetText(sb.ToString());
        }
        catch (System.Exception ex)
        {
            AddLog($"Error copying to clipboard: {ex.Message}", LogLevel.Error);
        }
    }
}