feat: update check

ObservatoryCore/UI/HttpClient.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Net.Http;
+
+namespace Observatory
+{
+    public sealed class HttpClient
+    {
+        private HttpClient()
+        { }
+
+        private static readonly Lazy<System.Net.Http.HttpClient> lazy = new Lazy<System.Net.Http.HttpClient>(() => new System.Net.Http.HttpClient());
+
+        public static System.Net.Http.HttpClient Client
+        {
+            get
+            {
+                return lazy.Value;
+            }
+        }
+
+        public static string GetString(string url)
+        {
+            return lazy.Value.GetStringAsync(url).Result;
+        }
+
+        public static HttpResponseMessage SendRequest(HttpRequestMessage request)
+        {
+            return lazy.Value.SendAsync(request).Result;
+        }
+
+        public static System.Threading.Tasks.Task<HttpResponseMessage> SendRequestAsync(HttpRequestMessage request)
+        {
+            return lazy.Value.SendAsync(request);
+        }
+    }
+}

ObservatoryCore/UI/ViewModels/CoreViewModel.cs

@@ -1,8 +1,10 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Data;
 using System.Diagnostics;
 using System.Linq;
+using System.Net.Http;
 using Avalonia.Controls;
 using Observatory.Framework.Interfaces;
 using Observatory.UI.Models;
@@ -16,9 +18,12 @@ namespace Observatory.UI.ViewModels
         private readonly ObservableCollection<IObservatoryWorker> workers;
         private readonly ObservableCollection<CoreModel> tabs;
         private string toggleButtonText;
+        private bool _UpdateAvailable;
         
         public CoreViewModel(IEnumerable<(IObservatoryWorker plugin, PluginManagement.PluginManager.PluginStatus signed)> workers, IEnumerable<(IObservatoryNotifier plugin, PluginManagement.PluginManager.PluginStatus signed)> notifiers)
         {
+            _UpdateAvailable = CheckUpdate();
+            
             this.notifiers = new ObservableCollection<IObservatoryNotifier>(notifiers.Select(p => p.plugin));
             this.workers = new ObservableCollection<IObservatoryWorker>(workers.Select(p => p.plugin));
             ToggleButtonText = "Start Monitor";
@@ -50,7 +55,7 @@ namespace Observatory.UI.ViewModels
 
             
             tabs.Add(new CoreModel() { Name = "Core", UI = new BasicUIViewModel(new ObservableCollection<object>()) { UIType = Framework.PluginUI.UIType.Core } });
-            
+
         }
 
         public void ReadAll()
@@ -93,6 +98,13 @@ namespace Observatory.UI.ViewModels
             Process.Start(donateOpen);
         }
 
+        public void GetUpdate()
+        {
+            ProcessStartInfo githubOpen = new("https://github.com/Xjph/ObservatoryCore/releases");
+            githubOpen.UseShellExecute = true;
+            Process.Start(githubOpen);
+        }
+
         public string ToggleButtonText
         {
             get => toggleButtonText;
@@ -136,5 +148,51 @@ namespace Observatory.UI.ViewModels
             }
         }
 
+        private bool CheckUpdate()
+        {
+            try
+            {
+                string releasesResponse;
+
+                var request = new HttpRequestMessage
+                {
+                    Method = HttpMethod.Get,
+                    RequestUri = new Uri("https://api.github.com/repos/xjph/ObservatoryCore/releases"),
+                    Headers = { { "User-Agent", "Xjph/ObservatoryCore" } }
+                };
+
+                releasesResponse = HttpClient.SendRequest(request).Content.ReadAsStringAsync().Result;
+
+                if (!string.IsNullOrEmpty(releasesResponse))
+                {
+                    var releases = System.Text.Json.JsonDocument.Parse(releasesResponse).RootElement.EnumerateArray();
+
+                    foreach (var release in releases)
+                    {
+                        if (release.GetProperty("tag_name").ToString().CompareTo("v" + System.Reflection.Assembly.GetEntryAssembly().GetName().Version.ToString()) > 0)
+                        {
+                            return true;
+                        }
+                    }
+                }
+
+            }
+            catch
+            {
+                return false;
+            }
+
+            return false;
+        }
+
+        private bool UpdateAvailable
+        {
+            get => _UpdateAvailable;
+            set
+            {
+                this.RaiseAndSetIfChanged(ref _UpdateAvailable, value);
+            }
+        }
+
     }
 }

ObservatoryCore/UI/Views/CoreView.axaml

@@ -42,18 +42,48 @@
     </TabControl>
     <Grid RowDefinitions="Auto,Auto" Grid.Row="2">
       <StackPanel Grid.Column="1" Height="50" VerticalAlignment="Bottom" Orientation="Vertical" HorizontalAlignment="Left">
-        <Button Classes="Hyperlink" Name="github" Margin="10,0,0,5" Command="{Binding OpenGithub}" FontSize="15">
+        <Button 
+          Classes="Hyperlink" 
+          Name="github" 
+          Margin="10,0,0,5" 
+          Command="{Binding OpenGithub}" 
+          FontSize="15" 
+          Cursor="Hand">
           github
         </Button>
-        <Button Classes="Hyperlink" Name="Donate" Margin="10,0,0,0" Command="{Binding OpenDonate}" FontSize="15">
+        <Button 
+          Classes="Hyperlink" 
+          Name="Donate" 
+          Margin="10,0,0,0" 
+          Command="{Binding OpenDonate}" 
+          FontSize="15" 
+          Cursor="Hand">
           Donate
         </Button>
       </StackPanel>
       <WrapPanel Grid.Column="2" Height="50" VerticalAlignment="Bottom" Orientation="Horizontal" HorizontalAlignment="Right">
-        <Button Name="ToggleMonitor" Margin="10" Command="{Binding ToggleMonitor}" Content="{Binding ToggleButtonText}">
+        <Button 
+          Classes="Hyperlink" 
+          Name="update" 
+          Margin="0,0,10,0" 
+          FontSize="15" 
+          Command="{Binding GetUpdate}"
+          IsVisible="{Binding UpdateAvailable}"
+          IsEnabled="{Binding UpdateAvailable}"
+          Cursor="Hand">
+          Update Available
+        </Button>
+        <Button 
+          Name="ToggleMonitor" 
+          Margin="10" 
+          Command="{Binding ToggleMonitor}" 
+          Content="{Binding ToggleButtonText}">
           Start Monitor
         </Button>
-        <Button Name="ReadAll" Margin="10" Command="{Binding ReadAll}">
+        <Button 
+          Name="ReadAll" 
+          Margin="10" 
+          Command="{Binding ReadAll}">
           Read All
         </Button>
       </WrapPanel>