Reuse GetMany

src/Discord.Net.WebSocket/Entities/Messages/MessageCache.cs

@@ -63,26 +63,8 @@ namespace Discord.WebSocket
                 if (!_messages.TryGetValue(fromMessageId.Value, out SocketMessage msg))
                     return ImmutableArray<SocketMessage>.Empty;
                 int around = limit / 2;
-                var before = _orderedMessages
-                    .Where(x => x < fromMessageId.Value)
-                    .Select(x =>
-                    {
-                        if (_messages.TryGetValue(x, out SocketMessage msg))
-                            return msg;
-                        return null;
-                    })
-                    .Where(x => x != null)
-                    .Take(around);
-                var after = _orderedMessages
-                    .Where(x => x > fromMessageId.Value)
-                    .Select(x =>
-                    {
-                        if (_messages.TryGetValue(x, out SocketMessage msg))
-                            return msg;
-                        return null;
-                    })
-                    .Where(x => x != null)
-                    .Take(around);
+                var before = GetMany(fromMessageId, Direction.Before, around);
+                var after = GetMany(fromMessageId, Direction.After, around);
 
                 return before.Concat(new SocketMessage[] { msg }).Concat(after).ToImmutableArray();
             }