support sending upnp events

MediaBrowser.Model/Dlna/EventSubscription.cs

@@ -0,0 +1,34 @@
+using System;
+
+namespace MediaBrowser.Model.Dlna
+{
+    public class EventSubscription
+    {
+        public string Id { get; set; }
+        public string CallbackUrl { get; set; }
+        public string NotificationType { get; set; }
+
+        public DateTime SubscriptionTime { get; set; }
+        public int TimeoutSeconds { get; set; }
+
+        public long TriggerCount { get; set; }
+
+        public void IncrementTriggerCount()
+        {
+            if (TriggerCount == long.MaxValue)
+            {
+                TriggerCount = 0;
+            }
+
+            TriggerCount++;
+        }
+
+        public bool IsExpired
+        {
+            get
+            {
+                return SubscriptionTime.AddSeconds(TimeoutSeconds) >= DateTime.UtcNow;
+            }
+        }
+    }
+}

MediaBrowser.Model/MediaBrowser.Model.csproj

@@ -73,6 +73,7 @@
     <Compile Include="Dlna\DeviceProfileInfo.cs" />
     <Compile Include="Dlna\DirectPlayProfile.cs" />
     <Compile Include="Dlna\DlnaMaps.cs" />
+    <Compile Include="Dlna\EventSubscription.cs" />
     <Compile Include="Dlna\Filter.cs" />
     <Compile Include="Dlna\MediaFormatProfile.cs" />
     <Compile Include="Dlna\MediaFormatProfileResolver.cs" />