Core/Battlegrounds: Move to scripts (#29799)

* Introduce new BattlegroundScript class for map/bg specific scripts
* Remove all sub, zone specific, battleground classes except Arena
* Move all bg zone scripts to new BattlegroundScripts class in script folder
* Remove ZoneScript from Battleground class
* Remove some unused hooks from Battleground

(cherry picked from commit be11f42a16d1fa0482e9572bf54e99e4dedd3c78)

4 files changed, 52 insertions, 2 deletions

diff --git a/src/server/game/Maps/Map.cpp b/src/server/game/Maps/Map.cpp
index b603d704f97..aa0f35abf15 100644
--- a/src/server/game/Maps/Map.cpp
+++ b/src/server/game/Maps/Map.cpp
@@ -17,6 +17,8 @@
 
 #include "Map.h"
 #include "Battleground.h"
+#include "BattlegroundMgr.h"
+#include "BattlegroundScript.h"
 #include "CellImpl.h"
 #include "CharacterPackets.h"
 #include "Containers.h"
@@ -3385,7 +3387,7 @@ TeamId InstanceMap::GetTeamIdInInstance() const
 /* ******* Battleground Instance Maps ******* */
 
 BattlegroundMap::BattlegroundMap(uint32 id, time_t expiry, uint32 InstanceId, Difficulty spawnMode)
-  : Map(id, expiry, InstanceId, spawnMode), m_bg(nullptr)
+  : Map(id, expiry, InstanceId, spawnMode), m_bg(nullptr), _battlegroundScript(nullptr), _scriptId(0)
 {
     //lets initialize visibility distance for BG/Arenas
     BattlegroundMap::InitVisibilityDistance();
@@ -3408,6 +3410,36 @@ void BattlegroundMap::InitVisibilityDistance()
     m_VisibilityNotifyPeriod = IsBattleArena() ? World::GetVisibilityNotifyPeriodInArenas() : World::GetVisibilityNotifyPeriodInBG();
 }
 
+std::string const& BattlegroundMap::GetScriptName() const
+{
+    return sObjectMgr->GetScriptName(_scriptId);
+}
+
+void BattlegroundMap::InitScriptData()
+{
+    if (_battlegroundScript)
+        return;
+
+    ASSERT(GetBG(), "Battleground not set yet!");
+
+    if (BattlegroundScriptTemplate const* scriptTemplate = sBattlegroundMgr->FindBattlegroundScriptTemplate(GetId(), GetBG()->GetTypeID()))
+    {
+        _scriptId = scriptTemplate->ScriptId;
+        _battlegroundScript.reset(sScriptMgr->CreateBattlegroundData(this));
+    }
+
+    // Make sure every battleground has a default script
+    if (!_battlegroundScript)
+    {
+        if (IsBattleArena())
+            _battlegroundScript = std::make_unique<ArenaScript>(this);
+        else
+            _battlegroundScript = std::make_unique<BattlegroundScript>(this);
+    }
+
+    _battlegroundScript->OnInit();
+}
+
 TransferAbortParams BattlegroundMap::CannotEnter(Player* player)
 {
     if (player->GetMapRef().getTarget() == this)
@@ -3451,6 +3483,12 @@ void BattlegroundMap::RemoveAllPlayers()
                     player->TeleportTo(player->GetBattlegroundEntryPoint());
 }
 
+void BattlegroundMap::Update(uint32 diff)
+{
+    Map::Update(diff);
+    _battlegroundScript->OnUpdate(diff);
+}
+
 AreaTrigger* Map::GetAreaTrigger(ObjectGuid const& guid)
 {
     return _objectsStore.Find<AreaTrigger>(guid);
diff --git a/src/server/game/Maps/Map.h b/src/server/game/Maps/Map.h
index 0339d92a6ee..901e03e0264 100644
--- a/src/server/game/Maps/Map.h
+++ b/src/server/game/Maps/Map.h
@@ -46,6 +46,7 @@
 
 class Battleground;
 class BattlegroundMap;
+class BattlegroundScript;
 class CreatureGroup;
 class GameObjectModel;
 class Group;
@@ -909,12 +910,22 @@ class TC_GAME_API BattlegroundMap : public Map
         void SetUnload();
         //void UnloadAll(bool pForce);
         void RemoveAllPlayers() override;
+        void Update(uint32 diff) override;
 
         virtual void InitVisibilityDistance() override;
         Battleground* GetBG() const { return m_bg; }
         void SetBG(Battleground* bg) { m_bg = bg; }
+
+        uint32 GetScriptId() const { return _scriptId; }
+        std::string const& GetScriptName() const;
+        BattlegroundScript* GetBattlegroundScript() { return _battlegroundScript.get(); }
+        BattlegroundScript const* GetBattlegroundScript() const { return _battlegroundScript.get(); }
+
+        void InitScriptData();
     private:
         Battleground* m_bg;
+        std::unique_ptr<BattlegroundScript> _battlegroundScript;
+        uint32 _scriptId;
 };
 
 template<class T, class CONTAINER>
diff --git a/src/server/game/Maps/MapManager.cpp b/src/server/game/Maps/MapManager.cpp
index 87f2bbe160a..4f2153e6bee 100644
--- a/src/server/game/Maps/MapManager.cpp
+++ b/src/server/game/Maps/MapManager.cpp
@@ -127,6 +127,7 @@ BattlegroundMap* MapManager::CreateBattleground(uint32 mapId, uint32 instanceId,
     ASSERT(map->IsBattlegroundOrArena());
     map->SetBG(bg);
     bg->SetBgMap(map);
+    map->InitScriptData();
     map->InitSpawnGroupState();
 
     if (sWorld->getBoolConfig(CONFIG_BATTLEGROUNDMAP_LOAD_GRIDS))
diff --git a/src/server/game/Maps/ZoneScript.h b/src/server/game/Maps/ZoneScript.h
index 370a2f6e239..3fd9e85aa19 100644
--- a/src/server/game/Maps/ZoneScript.h
+++ b/src/server/game/Maps/ZoneScript.h
@@ -92,7 +92,7 @@ class TC_GAME_API ZoneScript
         virtual void SetData(uint32 /*DataId*/, uint32 /*Value*/) { }
 
         virtual void TriggerGameEvent(uint32 gameEventId, WorldObject* source = nullptr, WorldObject* target = nullptr);
-        virtual void ProcessEvent(WorldObject* /*obj*/, uint32 /*eventId*/, WorldObject* /*invoker*/) { }
+        virtual void ProcessEvent([[maybe_unused]] WorldObject* obj, [[maybe_unused]] uint32 eventId, [[maybe_unused]] WorldObject* invoker) { }
         virtual void DoAction([[maybe_unused]] uint32 actionId, [[maybe_unused]] WorldObject* source = nullptr, [[maybe_unused]] WorldObject* target = nullptr) { }
 
         virtual void OnFlagStateChange([[maybe_unused]] GameObject* flagInBase, [[maybe_unused]] FlagState oldValue, [[maybe_unused]] FlagState newValue, [[maybe_unused]] Player* player) { }