HAcontrol/MainWindow.axaml.cs

using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;

using Avalonia.Controls;

namespace HAcontrol;

public partial class MainWindow : Window
{
    private System.Threading.CancellationTokenSource? _cts;

    public MainWindow()
    {
        InitializeComponent();
        _cts = new System.Threading.CancellationTokenSource();
        StartStatePolling(_cts.Token);
    }

    protected override void OnClosed(EventArgs e)
    {
        base.OnClosed(e);
        _cts?.Cancel();
        _cts?.Dispose();
    }

    private async void StartStatePolling(System.Threading.CancellationToken token)
    {
        while (!token.IsCancellationRequested)
        {
            await GetState();
            try
            {
                await Task.Delay(10000, token);
            }
            catch (TaskCanceledException)
            {
                break;
            }
        }
    }

    private async void Button_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
    {
        string webhookUrl = "/api/webhook/";
        string payload = "{\"event\": \"\"}";

        // HttpClientHandler to ignore SSL certificate errors (for development only!)
        var handler = new HttpClientHandler();
        handler.ServerCertificateCustomValidationCallback = (message, cert, chain, errors) => true;

        using (var client = new HttpClient(handler))
        {
            var content = new StringContent(payload, Encoding.UTF8, "application/json");
            using var _ = await client.PostAsync(webhookUrl, content);
            await Task.Delay(100);
        }

        await GetState();
    }

    private async Task GetState()
    {
        // HttpClientHandler to ignore SSL certificate errors (for development only!)
        var handler = new HttpClientHandler();
        handler.ServerCertificateCustomValidationCallback = (message, cert, chain, errors) => true;

        using (var client = new HttpClient(handler))
        {
            string statusUrl = "/api/states/";
            client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", "");

            using var response = await client.GetAsync(statusUrl);
            string statusJson = await response.Content.ReadAsStringAsync();

            // Parse the JSON and extract the state
            try
            {
                var jsonDoc = System.Text.Json.JsonDocument.Parse(statusJson);
                string? state = jsonDoc.RootElement.GetProperty("state").GetString();
                string? entity = jsonDoc.RootElement.GetProperty("entity_id").GetString();
                StatusText.Content = $"{state}";
                if (state == "on")
                    StatusText.Foreground = new Avalonia.Media.SolidColorBrush(Avalonia.Media.Colors.Green);
                else if (state == "off")
                    StatusText.Foreground = new Avalonia.Media.SolidColorBrush(Avalonia.Media.Colors.Red);
                else
                    StatusText.Foreground = new Avalonia.Media.SolidColorBrush(Avalonia.Media.Colors.Orange);
            }
            catch
            {
                StatusText.Content = "Fehler!";
                StatusText.Foreground = new Avalonia.Media.SolidColorBrush(Avalonia.Media.Colors.Red);
            }
        }
    }
}