Scripts/Commands: add some missing checks for .guild create command (#23201)

* Core/Conditions: implement CONDITION_GAMEMASTER

* Scripts/Commands: add some missing checks for .guild create command

(cherry picked from commit ae8750716f63ddc41f21bb38ceafe949d7260f0e)

1 files changed, 16 insertions, 1 deletions

diff --git a/src/server/scripts/Commands/cs_guild.cpp b/src/server/scripts/Commands/cs_guild.cpp
index 870089f5da7..7e6e2714e35 100644
--- a/src/server/scripts/Commands/cs_guild.cpp
+++ b/src/server/scripts/Commands/cs_guild.cpp
@@ -90,7 +90,22 @@ public:
         if (target->GetGuildId())
         {
             handler->SendSysMessage(LANG_PLAYER_IN_GUILD);
-            return true;
+            handler->SetSentErrorMessage(true);
+            return false;
+        }
+
+        if (sGuildMgr->GetGuildByName(guildName))
+        {
+            handler->SendSysMessage(LANG_GUILD_RENAME_ALREADY_EXISTS);
+            handler->SetSentErrorMessage(true);
+            return false;
+        }
+
+        if (sObjectMgr->IsReservedName(guildName) || !sObjectMgr->IsValidCharterName(guildName))
+        {
+            handler->SendSysMessage(LANG_BAD_VALUE);
+            handler->SetSentErrorMessage(true);
+            return false;
         }
 
         Guild* guild = new Guild;