feat(Scripts/Commands): Implement character changeaccount command (#13532)

* feat(Scripts/Commands): Implement character changeaccount command

* strings and stuff

* clear unused

data/sql/updates/pending_db_world/rev_1666552438715725700.sql

@@ -0,0 +1,8 @@
+--
+DELETE FROM `acore_string` WHERE `entry` = 5083;
+INSERT INTO `acore_string` (`entry`, `content_default`) VALUES
+(5083, 'Character %s (%u) moved from account %s (%u) to account %s (%u).');
+
+DELETE FROM `command` WHERE `name` = 'character changeaccount';
+INSERT INTO `command` (`name`, `security`, `help`) VALUES
+('character changeaccount', 3, 'Syntax: .character changeaccount $NewAccountName $Name.\nMoves the specified character to the provided account. \nKicks the player if the character is online.');

src/server/game/Miscellaneous/Language.h

@@ -1146,6 +1146,8 @@ enum AcoreStrings
 
     LANG_CMD_GOQUEST_INVALID_SYNTAX     = 5082,
 
+    LANG_CMD_CHAR_CHANGE_ACC_SUCCESS    = 5083,
+
     // Room for more strings    5083-9999
 
     // Level requirement notifications

src/server/scripts/Commands/cs_character.cpp

@@ -72,6 +72,7 @@ public:
             { "customize",      HandleCharacterCustomizeCommand,        SEC_GAMEMASTER, Console::Yes },
             { "changefaction",  HandleCharacterChangeFactionCommand,    SEC_GAMEMASTER, Console::Yes },
             { "changerace",     HandleCharacterChangeRaceCommand,       SEC_GAMEMASTER, Console::Yes },
+            { "changeaccount",  HandleCharacterChangeAccountCommand,    SEC_ADMINISTRATOR, Console::Yes },
             { "check",          characterCheckCommandTable },
             { "erase",          HandleCharacterEraseCommand,            SEC_CONSOLE,    Console::Yes },
             { "deleted",        characterDeletedCommandTable },
@@ -1061,6 +1062,55 @@ public:
         handler->PSendSysMessage("--------------------------------------");
         return true;
     }
+
+    static bool HandleCharacterChangeAccountCommand(ChatHandler* handler, std::string accountName, Optional<PlayerIdentifier> player)
+    {
+        if (!player)
+        {
+            player = PlayerIdentifier::FromTargetOrSelf(handler);
+        }
+
+        if (!player)
+        {
+            handler->SendSysMessage(LANG_PLAYER_NOT_FOUND);
+            handler->SetSentErrorMessage(true);
+            return false;
+        }
+
+        if (uint32 accountId = AccountMgr::GetId(accountName))
+        {
+            if (AccountMgr::GetCharactersCount(accountId) >= 10)
+            {
+                handler->PSendSysMessage(LANG_ACCOUNT_CHARACTER_LIST_FULL, accountName, accountId);
+                handler->SetSentErrorMessage(true);
+                return true;
+            }
+
+            if (CharacterCacheEntry const* cache = sCharacterCache->GetCharacterCacheByName(player->GetName()))
+            {
+                std::string accName;
+                AccountMgr::GetName(cache->AccountId, accName);
+                handler->PSendSysMessage(LANG_CMD_CHAR_CHANGE_ACC_SUCCESS, player->GetName(), player->GetGUID().GetCounter(), accName, cache->AccountId, accountName, accountId);
+            }
+
+            if (player->IsConnected())
+            {
+                player->GetConnectedPlayer()->GetSession()->KickPlayer("CMD char changeaccount");
+            }
+
+            CharacterDatabase.Query("UPDATE characters SET account = {} WHERE guid = {}", accountId, player->GetGUID().GetCounter());
+            sCharacterCache->UpdateCharacterAccountId(player->GetGUID(), accountId);
+
+        }
+        else
+        {
+            handler->PSendSysMessage(LANG_ACCOUNT_NOT_EXIST, accountName);
+            handler->SetSentErrorMessage(true);
+            return true;
+        }
+
+        return true;
+    }
 };
 
 void AddSC_character_commandscript()