feat(Core/Motd): Allow localized motd (#20542)

* Initial commit for localized motd

* Rename function that created world packages

* Update to satisfy code check

* Update code to accomodate localized motd

* Update command to support multiple optionales & adjusted db

* Code cleanup

* Update sql name

* Fix codestyle issues

* Remove hardcoded schema

* Add check for valid player in reload command

* Update to better code style

* Add missing include

* Fix redundant code usage

* Add missing include

* Remove sql files and create new rev sql files

* Address minor code reviews

* Fix code style

* Update code to address code revisions.

- Remove two unused functions
- Remove map
- Use available function to resolve LocaleConstant

* Fix code style

* Add check for base motd and update locale to DEFAULT_LOCALE

* Code docs

* Removed some docs, readd defaultd motd formatting

* Fix oversight in variable declaration

* Code style fix

* Update code based on code review

* ready for merge

* Fix set motd command due to changes to DEFAULT_LOCALE

* Fix CI

* Fix trailing whitespace

---------

Co-authored-by: Kitzunu <24550914+Kitzunu@users.noreply.github.com>

src/server/game/Motd/MotdMgr.h

@@ -20,6 +20,7 @@
 
 #include "Define.h"
 #include <string>
+#include "Common.h"
 
 class WorldPacket;
 
@@ -28,17 +29,33 @@ class AC_GAME_API MotdMgr
 public:
     static MotdMgr* instance();
 
+    /// Converts the localized string to world packages
+    void CreateWorldPackages();
+
     /// Set a new Message of the Day
-    void SetMotd(std::string motd);
+    void SetMotd(std::string motd, LocaleConstant locale);
 
     /// Load Message of the Day
     void LoadMotd();
 
     /// Get the current Message of the Day
-    char const* GetMotd();
+    char const* GetMotd(LocaleConstant locale);
 
-    /// Get the motd packet to send at login
-    WorldPacket const* GetMotdPacket();
+    /// Returns the current motd packet for the given locale
+    WorldPacket const* GetMotdPacket(LocaleConstant locale);
+
+    // Checks if string is valid locale
+    bool IsValidLocale(std::string const& locale);
+
+private:
+    // Loads the default motd from the motd table
+    std::string LoadDefaultMotd(uint32 realmId);
+    // Loads all available localized motd for the realm
+    void LoadLocalizedMotds(uint32 realmId);
+    // Sets the default mode if none is found in the database
+    void SetDefaultMotd();
+    // Create a worldpacket for a given motd localization
+    WorldPacket CreateWorldPacket(std::string const& motd);
 };
 
 #define sMotdMgr MotdMgr::instance()