broke up EnvironmentProvider into different services

NzbDrone.Core/Update/UpdateCheckService.cs

@@ -0,0 +1,38 @@
+using NLog;
+using NzbDrone.Common.EnvironmentInfo;
+
+namespace NzbDrone.Core.Update
+{
+    public interface ICheckUpdateService
+    {
+        UpdatePackage AvailableUpdate();
+    }
+
+
+    public class CheckUpdateService : ICheckUpdateService
+    {
+        private readonly IUpdatePackageProvider _updatePackageProvider;
+
+        private readonly Logger _logger;
+
+
+        public CheckUpdateService(IUpdatePackageProvider updatePackageProvider, Logger logger)
+        {
+            _updatePackageProvider = updatePackageProvider;
+            _logger = logger;
+        }
+
+        public UpdatePackage AvailableUpdate()
+        {
+            var latestAvailable = _updatePackageProvider.GetLatestUpdate();
+
+            if (latestAvailable == null || latestAvailable.Version <= BuildInfo.Version)
+            {
+                _logger.Debug("No update available.");
+                return null;
+            }
+
+            return latestAvailable;
+        }
+    }
+}