#1513 Added the update available icon

src/Ombi.Helpers/CacheKeys.cs

@@ -6,6 +6,6 @@ namespace Ombi.Helpers
 {
     public static class CacheKeys
     {
-        public const string RadarrCacher = nameof(RadarrCacher);
+        public const string Update = nameof(Update);
     }
 }

src/Ombi.Helpers/MemoryCacheHelper.cs

@@ -0,0 +1,54 @@
+#region Copyright
+// /************************************************************************
+//    Copyright (c) 2017 Jamie Rees
+//    File: MemoryCacheHelper.cs
+//    Created By: Jamie Rees
+//   
+//    Permission is hereby granted, free of charge, to any person obtaining
+//    a copy of this software and associated documentation files (the
+//    "Software"), to deal in the Software without restriction, including
+//    without limitation the rights to use, copy, modify, merge, publish,
+//    distribute, sublicense, and/or sell copies of the Software, and to
+//    permit persons to whom the Software is furnished to do so, subject to
+//    the following conditions:
+//   
+//    The above copyright notice and this permission notice shall be
+//    included in all copies or substantial portions of the Software.
+//   
+//    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+//    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+//    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+//    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+//    LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+//    OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+//    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//  ************************************************************************/
+#endregion
+
+
+using System;
+using Microsoft.Extensions.Caching.Memory;
+
+namespace Ombi.Helpers
+{
+    public static class MemoryCacheHelper
+    {
+        public static IMemoryCache TryAdd(this IMemoryCache cache, object cacheObject, TimeSpan slidingExpiration)
+        {
+            object cachedObject;
+            if (!cache.TryGetValue(CacheKeys.Update, out cachedObject))
+            { 
+                // Key not in cache, so get data.
+                
+                // Set cache options.
+                var cacheEntryOptions = new MemoryCacheEntryOptions()
+                    .SetSlidingExpiration(slidingExpiration);
+
+                // Save data in cache.
+                cache.Set(CacheKeys.Update, cacheObject, cacheEntryOptions);
+            }
+
+            return cache;
+        }
+    }
+}

src/Ombi.Helpers/Ombi.Helpers.csproj

@@ -10,6 +10,7 @@
 
   <ItemGroup>
     <PackageReference Include="EasyCrypto" Version="3.3.2" />
+    <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="2.0.0" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="2.0.0" />
     <PackageReference Include="Newtonsoft.Json" Version="10.0.3" />
     <PackageReference Include="System.Security.Claims" Version="4.3.0" />