feat(Core/Hooks): Added new hook for pvp flag state (#8336)

doc/changelog/pendings/changes_1633634641262326500.md

@@ -0,0 +1,6 @@
+
+### Added
+
+- Added `OnPlayerPVPFlagChange` hook, it will be executed after the pvp flag from a player gets changed.
+
+

src/server/game/Entities/Player/PlayerUpdates.cpp

@@ -1475,6 +1475,7 @@ void Player::UpdatePvP(bool state, bool _override)
     }
 
     RemoveFlag(PLAYER_FLAGS, PLAYER_FLAGS_PVP_TIMER);
+    sScriptMgr->OnPlayerPVPFlagChange(this, state);
 }
 
 void Player::UpdatePotionCooldown(Spell* spell)

src/server/game/Scripting/ScriptMgr.cpp

@@ -1366,6 +1366,11 @@ void ScriptMgr::OnPVPKill(Player* killer, Player* killed)
     FOREACH_SCRIPT(PlayerScript)->OnPVPKill(killer, killed);
 }
 
+void ScriptMgr::OnPlayerPVPFlagChange(Player* player, bool state)
+{
+    FOREACH_SCRIPT(PlayerScript)->OnPlayerPVPFlagChange(player, state);
+}
+
 void ScriptMgr::OnCreatureKill(Player* killer, Creature* killed)
 {
 #ifdef ELUNA

src/server/game/Scripting/ScriptMgr.h

@@ -729,6 +729,9 @@ public:
     // Called when a player kills another player
     virtual void OnPVPKill(Player* /*killer*/, Player* /*killed*/) { }
 
+    // Called when a player toggles pvp
+    virtual void OnPlayerPVPFlagChange(Player* /*player*/, bool /*state*/) { }
+
     // Called when a player kills a creature
     virtual void OnCreatureKill(Player* /*killer*/, Creature* /*killed*/) { }
 
@@ -1612,6 +1615,7 @@ public: /* PlayerScript */
     void OnSendInitialPacketsBeforeAddToMap(Player* player, WorldPacket& data);
     void OnPlayerReleasedGhost(Player* player);
     void OnPVPKill(Player* killer, Player* killed);
+    void OnPlayerPVPFlagChange(Player* player, bool state);
     void OnCreatureKill(Player* killer, Creature* killed);
     void OnCreatureKilledByPet(Player* petOwner, Creature* killed);
     void OnPlayerKilledByCreature(Creature* killer, Player* killed);