Initial split of the modules

NadekoBot.Core/Modules/Administration/Services/AdministrationService.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Discord;
+using Discord.Commands;
+using Discord.WebSocket;
+using NadekoBot.Common.Collections;
+using NadekoBot.Services;
+using NadekoBot.Services.Database.Models;
+using NLog;
+
+namespace NadekoBot.Modules.Administration.Services
+{
+    public class AdministrationService : INService
+    {
+        public readonly ConcurrentHashSet<ulong> DeleteMessagesOnCommand;
+        private readonly Logger _log;
+
+        public AdministrationService(IEnumerable<GuildConfig> gcs, CommandHandler cmdHandler)
+        {
+            _log = LogManager.GetCurrentClassLogger();
+
+            DeleteMessagesOnCommand = new ConcurrentHashSet<ulong>(gcs.Where(g => g.DeleteMessageOnCommand).Select(g => g.GuildId));
+            cmdHandler.CommandExecuted += DelMsgOnCmd_Handler;
+        }
+
+        private Task DelMsgOnCmd_Handler(IUserMessage msg, CommandInfo cmd)
+        {
+            var _ = Task.Run(async () =>
+            {
+                try
+                {
+                    var channel = msg.Channel as SocketTextChannel;
+                    if (channel == null)
+                        return;
+                    if (DeleteMessagesOnCommand.Contains(channel.Guild.Id) && cmd.Name != "prune" && cmd.Name != "pick")
+                        await msg.DeleteAsync().ConfigureAwait(false);
+                }
+                catch (Exception ex)
+                {
+                    _log.Warn("Delmsgoncmd errored...");
+                    _log.Warn(ex);
+                }
+            });
+            return Task.CompletedTask;
+        }
+    }
+}