From fe4899202decddbba30e902825486f375020e343 Mon Sep 17 00:00:00 2001
From: Skjalf <47818697+Nyeriah@users.noreply.github.com>
Date: Mon, 17 Jan 2022 06:05:32 -0300
Subject: [PATCH] feat(Core/Conditions): Implement
 CONDITION_SOURCE_CREATURE_VISIBILITY (#10208)

---
 src/server/game/Conditions/ConditionMgr.h  |  3 ++-
 src/server/game/Entities/Object/Object.cpp | 18 ++++++++++++++++--
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/src/server/game/Conditions/ConditionMgr.h b/src/server/game/Conditions/ConditionMgr.h
index 75b9453e9..2c619f623 100644
--- a/src/server/game/Conditions/ConditionMgr.h
+++ b/src/server/game/Conditions/ConditionMgr.h
@@ -149,7 +149,8 @@ enum ConditionSourceType
     CONDITION_SOURCE_TYPE_GRAVEYARD                      = 27, // don't use on 3.3.5a
     CONDITION_SOURCE_TYPE_PLAYER_LOOT_TEMPLATE           = 28,
     CONDITION_SOURCE_TYPE_CREATURE_RESPAWN               = 29,
-    CONDITION_SOURCE_TYPE_MAX                            = 30 // placeholder
+    CONDITION_SOURCE_TYPE_CREATURE_VISIBILITY            = 30,
+    CONDITION_SOURCE_TYPE_MAX                            = 31 // placeholder
 };
 
 enum RelationType
diff --git a/src/server/game/Entities/Object/Object.cpp b/src/server/game/Entities/Object/Object.cpp
index 72bb2d164..863466aae 100644
--- a/src/server/game/Entities/Object/Object.cpp
+++ b/src/server/game/Entities/Object/Object.cpp
@@ -1908,8 +1908,22 @@ bool WorldObject::CanSeeOrDetect(WorldObject const* obj, bool ignoreStealth, boo
 
     // Creature scripts
     if (Creature const* cObj = obj->ToCreature())
-        if (cObj->IsAIEnabled && this->ToPlayer() && !cObj->AI()->CanBeSeen(this->ToPlayer()))
-            return false;
+    {
+        if (Player const* player = this->ToPlayer())
+        {
+            if (cObj->IsAIEnabled && !cObj->AI()->CanBeSeen(player))
+            {
+                return false;
+            }
+
+            ConditionList conditions = sConditionMgr->GetConditionsForNotGroupedEntry(CONDITION_SOURCE_TYPE_CREATURE_VISIBILITY, cObj->GetEntry());
+
+            if (!sConditionMgr->IsObjectMeetToConditions((WorldObject*)this, conditions))
+            {
+                return false;
+            }
+        }
+    }
 
     // Gameobject scripts
     if (GameObject const* goObj = obj->ToGameObject())