Implemented version fetching from source control git server. Added self version detection and update checks

Moonlight.Api/Services/ApplicationService.cs

@@ -1,26 +1,36 @@
 using System.Diagnostics;
 using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
 using Moonlight.Api.Helpers;
 
 namespace Moonlight.Api.Services;
 
-public class ApplicationService : IHostedLifecycleService
+public class ApplicationService : IHostedService
 {
+    private readonly VersionService VersionService;
+    private readonly ILogger<ApplicationService> Logger;
+
     public DateTimeOffset StartedAt { get; private set; }
     public string VersionName { get; private set; } = "N/A";
     public bool IsUpToDate { get; set; } = true;
     public string OperatingSystem { get; private set; } = "N/A";
-    
+
+    public ApplicationService(VersionService versionService, ILogger<ApplicationService> logger)
+    {
+        VersionService = versionService;
+        Logger = logger;
+    }
+
     public Task<long> GetMemoryUsageAsync()
     {
         using var currentProcess = Process.GetCurrentProcess();
         return Task.FromResult(currentProcess.WorkingSet64);
     }
-    
+
     public async Task<double> GetCpuUsageAsync()
     {
         using var currentProcess = Process.GetCurrentProcess();
-        
+
         // Get initial values
         var startCpuTime = currentProcess.TotalProcessorTime;
         var startTime = DateTime.UtcNow;
@@ -39,26 +49,37 @@ public class ApplicationService : IHostedLifecycleService
 
         return Math.Round(cpuUsagePercent, 2);
     }
-    
-    public async Task StartedAsync(CancellationToken cancellationToken)
+
+    public async Task StartAsync(CancellationToken cancellationToken)
     {
         StartedAt = DateTimeOffset.UtcNow;
         
-        // TODO: Update / version check
-
-        VersionName = "v2.1.0 (a2d4edc0e5)";
-        IsUpToDate = true;
-
         OperatingSystem = OsHelper.GetName();
+
+        try
+        {
+            var currentVersion = await VersionService.GetInstanceVersionAsync();
+            var latestVersion = await VersionService.GetLatestVersionAsync();
+
+            VersionName = currentVersion.Identifier;
+            IsUpToDate = latestVersion == null || currentVersion.Identifier == latestVersion.Identifier;
+            
+            Logger.LogInformation("Running Moonlight Panel {version} on {operatingSystem}", VersionName, OperatingSystem);
+
+            if (!IsUpToDate)
+                Logger.LogWarning("Your instance is not up-to-date");
+
+            if (currentVersion.IsDevelopment)
+                Logger.LogWarning("Your instance is running a development version");
+
+            if (currentVersion.IsPreRelease)
+                Logger.LogWarning("Your instance is running a pre-release version");
+        }
+        catch (Exception e)
+        {
+            Logger.LogError(e, "An unhandled exception occurred while fetching version details");
+        }
     }
 
-    #region Unused
-
-    public Task StartAsync(CancellationToken cancellationToken) => Task.CompletedTask;
     public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;
-    public Task StartingAsync(CancellationToken cancellationToken) => Task.CompletedTask;
-    public Task StoppedAsync(CancellationToken cancellationToken) => Task.CompletedTask;
-    public Task StoppingAsync(CancellationToken cancellationToken) => Task.CompletedTask;
-
-    #endregion
 }