Core/Entities: Basic AreaTrigger System (#18035)

* Implemented AreaTrigger Templates
* Implemented AreaTrigger Splines
* Implemented SPELL_AURA_AREA_TRIGGER
* and many more

src/server/game/Scripting/ScriptMgr.cpp

@@ -96,6 +96,10 @@ template<>
 struct is_script_database_bound<AchievementCriteriaScript>
     : std::true_type { };
 
+template<>
+struct is_script_database_bound<AreaTriggerEntityScript>
+    : std::true_type { };
+
 template<>
 struct is_script_database_bound<SceneScript>
     : std::true_type { };
@@ -662,6 +666,35 @@ private:
     bool swapped;
 };
 
+/// This hook is responsible for swapping AreaTriggerEntityScript's
+template<typename Base>
+class ScriptRegistrySwapHooks<AreaTriggerEntityScript, Base>
+    : public ScriptRegistrySwapHookBase
+{
+public:
+    ScriptRegistrySwapHooks() : swapped(false) { }
+
+    void BeforeReleaseContext(std::string const& context) final override
+    {
+        auto const bounds = static_cast<Base*>(this)->_ids_of_contexts.equal_range(context);
+        if (bounds.first != bounds.second)
+            swapped = true;
+    }
+
+    void BeforeSwapContext(bool /*initialize*/) override
+    {
+        swapped = false;
+    }
+
+    void BeforeUnload() final override
+    {
+        ASSERT(!swapped);
+    }
+
+private:
+    bool swapped;
+};
+
 /// This hook is responsible for swapping SceneScript's
 template<typename Base>
 class ScriptRegistrySwapHooks<SceneScript, Base>
@@ -2337,6 +2370,73 @@ void ScriptMgr::ModifySpellDamageTaken(Unit* target, Unit* attacker, int32& dama
     FOREACH_SCRIPT(PlayerScript)->ModifySpellDamageTaken(target, attacker, damage);
 }
 
+// AreaTriggerEntityScript
+void ScriptMgr::OnAreaTriggerEntityInitialize(AreaTrigger* areaTrigger)
+{
+    ASSERT(areaTrigger);
+
+    GET_SCRIPT(AreaTriggerEntityScript, areaTrigger->GetScriptId(), tmpscript);
+    tmpscript->OnInitialize(areaTrigger);
+}
+
+void ScriptMgr::OnAreaTriggerEntityCreate(AreaTrigger* areaTrigger)
+{
+    ASSERT(areaTrigger);
+
+    GET_SCRIPT(AreaTriggerEntityScript, areaTrigger->GetScriptId(), tmpscript);
+    tmpscript->OnCreate(areaTrigger);
+}
+
+void ScriptMgr::OnAreaTriggerEntityUpdate(AreaTrigger* areaTrigger, uint32 diff)
+{
+    ASSERT(areaTrigger);
+
+    GET_SCRIPT(AreaTriggerEntityScript, areaTrigger->GetScriptId(), tmpscript);
+    tmpscript->OnUpdate(areaTrigger, diff);
+}
+
+void ScriptMgr::OnAreaTriggerEntitySplineIndexReached(AreaTrigger* areaTrigger, int splineIndex)
+{
+    ASSERT(areaTrigger);
+
+    GET_SCRIPT(AreaTriggerEntityScript, areaTrigger->GetScriptId(), tmpscript);
+    tmpscript->OnSplineIndexReached(areaTrigger, splineIndex);
+}
+
+void ScriptMgr::OnAreaTriggerEntityDestinationReached(AreaTrigger* areaTrigger)
+{
+    ASSERT(areaTrigger);
+
+    GET_SCRIPT(AreaTriggerEntityScript, areaTrigger->GetScriptId(), tmpscript);
+    tmpscript->OnDestinationReached(areaTrigger);
+}
+
+void ScriptMgr::OnAreaTriggerEntityUnitEnter(AreaTrigger* areaTrigger, Unit* unit)
+{
+    ASSERT(areaTrigger);
+    ASSERT(unit);
+
+    GET_SCRIPT(AreaTriggerEntityScript, areaTrigger->GetScriptId(), tmpscript);
+    tmpscript->OnUnitEnter(areaTrigger, unit);
+}
+
+void ScriptMgr::OnAreaTriggerEntityUnitExit(AreaTrigger* areaTrigger, Unit* unit)
+{
+    ASSERT(areaTrigger);
+    ASSERT(unit);
+
+    GET_SCRIPT(AreaTriggerEntityScript, areaTrigger->GetScriptId(), tmpscript);
+    tmpscript->OnUnitExit(areaTrigger, unit);
+}
+
+void ScriptMgr::OnAreaTriggerEntityRemove(AreaTrigger* areaTrigger)
+{
+    ASSERT(areaTrigger);
+
+    GET_SCRIPT(AreaTriggerEntityScript, areaTrigger->GetScriptId(), tmpscript);
+    tmpscript->OnRemove(areaTrigger);
+}
+
 // Scene
 void ScriptMgr::OnSceneStart(Player* player, uint32 sceneInstanceID, SceneTemplate const* sceneTemplate)
 {
@@ -2546,6 +2646,12 @@ GroupScript::GroupScript(const char* name)
     ScriptRegistry<GroupScript>::Instance()->AddScript(this);
 }
 
+AreaTriggerEntityScript::AreaTriggerEntityScript(const char* name)
+    : ScriptObject(name)
+{
+    ScriptRegistry<AreaTriggerEntityScript>::Instance()->AddScript(this);
+}
+
 // Specialize for each script type class like so:
 template class TC_GAME_API ScriptRegistry<SpellScriptLoader>;
 template class TC_GAME_API ScriptRegistry<ServerScript>;
@@ -2573,4 +2679,5 @@ template class TC_GAME_API ScriptRegistry<GuildScript>;
 template class TC_GAME_API ScriptRegistry<GroupScript>;
 template class TC_GAME_API ScriptRegistry<UnitScript>;
 template class TC_GAME_API ScriptRegistry<AccountScript>;
+template class TC_GAME_API ScriptRegistry<AreaTriggerEntityScript>;
 template class TC_GAME_API ScriptRegistry<SceneScript>;