mod-swift-travel-form/src/mod_swift_travel_form.cpp

#include "ScriptMgr.h"
#include "Player.h"
#include "Unit.h"
#include "SharedDefines.h"
#include "WorldSession.h"

class SwiftTravelForm_UnitScript : public UnitScript
{
public:
    SwiftTravelForm_UnitScript()
    : UnitScript("SwiftTravelForm_UnitScript", true, { UNITHOOK_ON_UNIT_SET_SHAPESHIFT_FORM })
    {
    }

    void OnUnitSetShapeshiftForm(Unit* unit, uint8 form) override
    {
        if (!unit || unit->GetTypeId() != TYPEID_PLAYER)
            return;

        Player* player = unit->ToPlayer();
        if (!player)
            return;

        player->GetSession()->SendAreaTriggerMessage("Shapeshift form changed.");
    }
};

void AddSC_swift_travel_form()
{
    new SwiftTravelForm_UnitScript();
}