Core/Scripts: unified scripted gossip/quest api

- Changed self-accessor on GameObjectAI to "me", like UnitAI
- Moved all related functions to AI, now Unit and GameObject have the same function names with identical behaviour
- Remove "OnUpdate" from CreatureScript/GameObjectScript, was never used and we already have AI Update method
- Quest methods no longer return a bool, the return value was used to call the AI version if the ScriptMgr one returned false
- Implemented GameObjectAI::Destroyed hook (was never called), implemented Damaged method
- Rename OnStateChanged to OnLootStateChanged to reflect when it's really called, and created a new hook OnStateChanged that only gets called on GOState change
- Since the functions are now only getting called from AI, made GetAI methods full virtual. (CanSpawn method is anyways going to be used on creatures with AI)

(cherry picked from commit f913f3bb8977c127d200d5d4a608ab434b21bbcd)

2 files changed, 26 insertions, 8 deletions

diff --git a/src/server/scripts/EasternKingdoms/SunkenTemple/sunken_temple.cpp b/src/server/scripts/EasternKingdoms/SunkenTemple/sunken_temple.cpp
index b680823c1a5..1b2bbbfa4fc 100644
--- a/src/server/scripts/EasternKingdoms/SunkenTemple/sunken_temple.cpp
+++ b/src/server/scripts/EasternKingdoms/SunkenTemple/sunken_temple.cpp
@@ -31,6 +31,7 @@ EndContentData */
 #include "InstanceScript.h"
 #include "Player.h"
 #include "ScriptedCreature.h"
+#include "GameObjectAI.h"
 #include "sunken_temple.h"
 
 /*#####
@@ -56,16 +57,26 @@ public:
 
 class go_atalai_statue : public GameObjectScript
 {
-public:
-    go_atalai_statue() : GameObjectScript("go_atalai_statue") { }
+    public:
+        go_atalai_statue() : GameObjectScript("go_atalai_statue") { }
 
-    bool OnGossipHello(Player* player, GameObject* go) override
-    {
-        if (InstanceScript* instance = player->GetInstanceScript())
-            instance->SetData(EVENT_STATE, go->GetEntry());
-        return false;
-    }
+        struct go_atalai_statueAI : public GameObjectAI
+        {
+            go_atalai_statueAI(GameObject* go) : GameObjectAI(go), instance(go->GetInstanceScript()) { }
+
+            InstanceScript* instance;
+
+            bool GossipHello(Player* player, bool /*reportUse*/) override
+            {
+                instance->SetData(EVENT_STATE, me->GetEntry());
+                return false;
+            }
+        };
 
+        GameObjectAI* GetAI(GameObject* go) const override
+        {
+            return GetSunkenTempleAI<go_atalai_statueAI>(go);
+        }
 };
 
 void AddSC_sunken_temple()
diff --git a/src/server/scripts/EasternKingdoms/SunkenTemple/sunken_temple.h b/src/server/scripts/EasternKingdoms/SunkenTemple/sunken_temple.h
index c905702d3bc..4815e6ac7ac 100644
--- a/src/server/scripts/EasternKingdoms/SunkenTemple/sunken_temple.h
+++ b/src/server/scripts/EasternKingdoms/SunkenTemple/sunken_temple.h
@@ -18,6 +18,7 @@
 #ifndef DEF_SUNKEN_TEMPLE_H
 #define DEF_SUNKEN_TEMPLE_H
 
+#define STScriptName "instance_sunken_temple"
 #define DataHeader "ST"
 
 enum STEvents
@@ -25,4 +26,10 @@ enum STEvents
     EVENT_STATE = 1
 };
 
+template <class AI, class T>
+inline AI* GetSunkenTempleAI(T* obj)
+{
+    return GetInstanceAI<AI>(obj, STScriptName);
+}
+
 #endif