Core/Players: Add level restrictions for faction changes (#30057)

Co-authored-by: Shauren <shauren.trinity@gmail.com>

4 files changed, 35 insertions, 2 deletions

diff --git a/src/server/database/Database/Implementation/CharacterDatabase.cpp b/src/server/database/Database/Implementation/CharacterDatabase.cpp
index 10b2a3307f2..35c9d4d5537 100644
--- a/src/server/database/Database/Implementation/CharacterDatabase.cpp
+++ b/src/server/database/Database/Implementation/CharacterDatabase.cpp
@@ -420,7 +420,7 @@ void CharacterDatabaseConnection::DoPrepareStatements()
     PrepareStatement(CHAR_SEL_CHARACTER_AT_LOGIN, "SELECT at_login FROM characters WHERE guid = ?", CONNECTION_SYNCH);
     PrepareStatement(CHAR_SEL_CHAR_CLASS_LVL_AT_LOGIN, "SELECT class, level, at_login, knownTitles FROM characters WHERE guid = ?", CONNECTION_SYNCH);
     PrepareStatement(CHAR_SEL_CHAR_CUSTOMIZE_INFO, "SELECT name, race, class, gender, at_login FROM characters WHERE guid = ?", CONNECTION_ASYNC);
-    PrepareStatement(CHAR_SEL_CHAR_RACE_OR_FACTION_CHANGE_INFOS, "SELECT c.at_login, c.knownTitles, gm.guid FROM characters c LEFT JOIN group_member gm ON c.guid = gm.memberGuid WHERE c.guid = ?", CONNECTION_ASYNC);
+    PrepareStatement(CHAR_SEL_CHAR_RACE_OR_FACTION_CHANGE_INFOS, "SELECT c.at_login, c.knownTitles, gm.guid, c.map FROM characters c LEFT JOIN group_member gm ON c.guid = gm.memberGuid WHERE c.guid = ?", CONNECTION_ASYNC);
     PrepareStatement(CHAR_SEL_INSTANCE, "SELECT data, completedEncounters FROM instance WHERE map = ? AND id = ?", CONNECTION_SYNCH);
     PrepareStatement(CHAR_SEL_PERM_BIND_BY_INSTANCE, "SELECT guid FROM character_instance WHERE instance = ? and permanent = 1", CONNECTION_SYNCH);
     PrepareStatement(CHAR_SEL_CHAR_COD_ITEM_MAIL, "SELECT id, messageType, mailTemplateId, sender, subject, body, money, has_items FROM mail WHERE receiver = ? AND has_items <> 0 AND cod <> 0", CONNECTION_SYNCH);
diff --git a/src/server/game/Handlers/CharacterHandler.cpp b/src/server/game/Handlers/CharacterHandler.cpp
index 29b39902a5e..706384c9b55 100644
--- a/src/server/game/Handlers/CharacterHandler.cpp
+++ b/src/server/game/Handlers/CharacterHandler.cpp
@@ -1670,6 +1670,7 @@ void WorldSession::HandleCharFactionOrRaceChangeCallback(std::shared_ptr<Charact
     uint32 atLoginFlags        = fields[0].GetUInt16();
     std::string knownTitlesStr = fields[1].GetString();
     uint32 groupId             = !fields[2].IsNull() ? fields[2].GetUInt32() : 0;
+    uint32 mapId               = fields[3].GetUInt16();
 
     uint32 usedLoginFlag = (factionChangeInfo->FactionChange ? AT_LOGIN_CHANGE_FACTION : AT_LOGIN_CHANGE_RACE);
     if (!(atLoginFlags & usedLoginFlag))
@@ -1678,6 +1679,18 @@ void WorldSession::HandleCharFactionOrRaceChangeCallback(std::shared_ptr<Charact
         return;
     }
 
+    if (level < 10)
+    {
+        SendCharFactionChange(CHAR_CREATE_ERROR, factionChangeInfo.get());
+        return;
+    }
+
+    if (playerClass == CLASS_DEATH_KNIGHT && (level < 60 || mapId == 609))
+    {
+        SendCharFactionChange(CHAR_CREATE_RESTRICTED_RACECLASS, factionChangeInfo.get());
+        return;
+    }
+
     uint32 newTeam = Player::TeamForRace(factionChangeInfo->Race);
     if (factionChangeInfo->FactionChange == (Player::TeamForRace(oldRace) == newTeam))
     {
diff --git a/src/server/game/Miscellaneous/Language.h b/src/server/game/Miscellaneous/Language.h
index 073c0294f71..c0200ef61e1 100644
--- a/src/server/game/Miscellaneous/Language.h
+++ b/src/server/game/Miscellaneous/Language.h
@@ -449,7 +449,9 @@ enum TrinityStrings
     LANG_COMMAND_LEARN_ALL_PETTALENT_HELP = 394,
     LANG_COMMAND_BG_START_HELP            = 395,
     LANG_COMMAND_BG_STOP_HELP             = 396,
-    // Room for more level 2                397-399 not used
+    LANG_CHANGEFACTION_NOT_ELIGIBLE_10    = 397,
+    LANG_CHANGEFACTION_NOT_ELIGIBLE_60    = 398,
+    // Room for more level 2                399 not used
 
     // level 3 chat
     LANG_SCRIPTS_RELOADED                 = 400,
diff --git a/src/server/scripts/Commands/cs_character.cpp b/src/server/scripts/Commands/cs_character.cpp
index b8c175f0fa1..2633b8313a2 100644
--- a/src/server/scripts/Commands/cs_character.cpp
+++ b/src/server/scripts/Commands/cs_character.cpp
@@ -422,6 +422,24 @@ public:
         if (!player)
             return false;
 
+        CharacterCacheEntry const* characterInfo = sCharacterCache->GetCharacterCacheByGuid(player->GetGUID());
+        if (!characterInfo)
+            return false;
+
+        if (characterInfo->Level < 10)
+        {
+            handler->PSendSysMessage(LANG_CHANGEFACTION_NOT_ELIGIBLE_10);
+            handler->SetSentErrorMessage(true);
+            return false;
+        }
+
+        if (characterInfo->Class == CLASS_DEATH_KNIGHT && characterInfo->Level < 60)
+        {
+            handler->PSendSysMessage(LANG_CHANGEFACTION_NOT_ELIGIBLE_60);
+            handler->SetSentErrorMessage(true);
+            return false;
+        }
+
         if (Player* target = player->GetConnectedPlayer())
         {
             handler->PSendSysMessage(LANG_CUSTOMIZE_PLAYER, handler->GetNameLink(target).c_str());