Core/Chat: Custom channel preservation rewrite. Channel data is now loaded at startup, and written to the DB periodically, instead of both things happening in real time.

Port From (https://github.com/TrinityCore/TrinityCore/commit/8839fa3fe24e72e4506e94389663b82ab2292649)

Source/Game/Server/WorldConfig.cs

@@ -224,6 +224,7 @@ namespace Game
             Values[WorldCfg.MailLevelReq] = GetDefaultValue("LevelReq.Mail", 1);
             Values[WorldCfg.PreserveCustomChannels] = GetDefaultValue("PreserveCustomChannels", false);
             Values[WorldCfg.PreserveCustomChannelDuration] = GetDefaultValue("PreserveCustomChannelDuration", 14);
+            Values[WorldCfg.PreserveCustomChannelInterval] = GetDefaultValue("PreserveCustomChannelInterval", 5);
             Values[WorldCfg.GridUnload] = GetDefaultValue("GridUnload", true);
             Values[WorldCfg.BasemapLoadGrids] = GetDefaultValue("BaseMapLoadAllGrids", false);
             if ((bool)Values[WorldCfg.BasemapLoadGrids] && (bool)Values[WorldCfg.GridUnload])

Source/Game/Server/WorldManager.cs

@@ -1005,6 +1005,8 @@ namespace Game
 
             m_timers[WorldTimers.WhoList].SetInterval(5 * Time.InMilliseconds); // update who list cache every 5 seconds
 
+            m_timers[WorldTimers.ChannelSave].SetInterval(WorldConfig.GetIntValue(WorldCfg.PreserveCustomChannelInterval) * Time.Minute * Time.InMilliseconds);
+
             //to set mailtimer to return mails every day between 4 and 5 am
             //mailtimer is increased when updating auctions
             //one second is 1000 -(tested on win system)
@@ -1027,8 +1029,8 @@ namespace Game
             // Delete all characters which have been deleted X days before
             Player.DeleteOldCharacters();
 
-            // Delete all custom channels which haven't been used for PreserveCustomChannelDuration days.
-            Channel.CleanOldChannelsInDB();
+            Log.outInfo(LogFilter.ServerLoading, "Initializing chat channels...");
+            ChannelManager.LoadFromDB();
 
             Log.outInfo(LogFilter.ServerLoading, "Initializing Opcodes...");
             PacketManager.Initialize();
@@ -1291,6 +1293,20 @@ namespace Game
                 Global.WhoListStorageMgr.Update();
             }
 
+            if (m_timers[WorldTimers.ChannelSave].Passed())
+            {
+                m_timers[WorldTimers.ChannelSave].Reset();
+
+                if (WorldConfig.GetBoolValue(WorldCfg.PreserveCustomChannels))
+                {
+                    ChannelManager mgr1 = ChannelManager.ForTeam(Team.Alliance);
+                    mgr1.SaveToDB();
+                    ChannelManager mgr2 = ChannelManager.ForTeam(Team.Horde);
+                    if (mgr1 != mgr2)
+                        mgr2.SaveToDB();
+                }
+            }
+
             // Handle daily quests reset time
             if (currentGameTime > m_NextDailyQuestReset)
             {
@@ -2514,6 +2530,7 @@ namespace Game
         GuildSave,
         Blackmarket,
         WhoList,
+        ChannelSave,
         Max
     }