Added .nsfwcc command to prevent memory leaks if nsfw is spammed a lot.

src/NadekoBot/Modules/NSFW/NSFW.cs

@@ -206,6 +206,15 @@ namespace NadekoBot.Modules.NSFW
             }
         }
 
+        [NadekoCommand, Usage, Description, Aliases]
+        [RequireContext(ContextType.Guild)]
+        [OwnerOnly]
+        public Task NsfwClearCache()
+        {
+            _service.ClearCache();
+            return Context.Channel.SendConfirmAsync("👌");
+        }
+
         public async Task InternalDapiCommand(string tag, DapiSearchType type, bool forceExplicit)
         {
             ImageCacherObject imgObj;

src/NadekoBot/Modules/Searches/Common/SearchImageCacher.cs

@@ -165,6 +165,11 @@ namespace NadekoBot.Modules.Searches.Common
             }
             return list.ToArray();
         }
+
+        public void Clear()
+        {
+            _cache.Clear();
+        }
     }
 
     public class ImageCacherObject : IComparable<ImageCacherObject>

src/NadekoBot/Modules/Searches/Services/SearchesService.cs

@@ -187,6 +187,14 @@ namespace NadekoBot.Modules.Searches.Services
             }
             return added;
         }
+
+        public void ClearCache()
+        {
+            foreach (var c in _imageCacher)
+            {
+                c.Value?.Clear();
+            }
+        }
     }
     
     public struct UserChannelPair

src/NadekoBot/Resources/CommandStrings.resx

@@ -3771,4 +3771,13 @@
   <data name="clubleaderboard_desc" xml:space="preserve">
     <value>Shows club rankings on the specified page.</value>
   </data>
+  <data name="nsfwclearcache_cmd" xml:space="preserve">
+    <value>nsfwcc</value>
+  </data>
+  <data name="nsfwclearcache_usage" xml:space="preserve">
+    <value>`{0}nsfwcc`</value>
+  </data>
+  <data name="nsfwclearcache_desc" xml:space="preserve">
+    <value>Clears nsfw cache.</value>
+  </data>
 </root>