fix(Scripts/Hyjal): Implement Eternal Silence spell when going into t… (#18960)

fix(Scripts/Hyjal): Implement Eternal Silence spell when going into the Well of Eternity

data/sql/updates/pending_db_world/rev_1716843579555488300.sql

@@ -0,0 +1,4 @@
+--
+DELETE FROM `spell_linked_spell` WHERE `spell_trigger` = -42201 AND `spell_effect` = 42205;
+INSERT INTO `spell_linked_spell` (`spell_trigger`, `spell_effect`, `type`, `comment`) VALUES
+(-42201, 42205, 0, 'Eternal Silence trigger Residue of Eternity on removal');

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

@@ -2176,6 +2176,9 @@ void Player::SetInWater(bool apply)
     RemoveAurasWithInterruptFlags(apply ? AURA_INTERRUPT_FLAG_NOT_ABOVEWATER : AURA_INTERRUPT_FLAG_NOT_UNDERWATER);
 
     getHostileRefMgr().updateThreatTables();
+
+    if (InstanceScript* instance = GetInstanceScript())
+        instance->OnPlayerInWaterStateUpdate(this, apply);
 }
 
 bool Player::IsInAreaTriggerRadius(AreaTrigger const* trigger, float delta) const

src/server/game/Instances/InstanceScript.h

@@ -186,6 +186,9 @@ public:
 
     virtual void OnPlayerAreaUpdate(Player* /*player*/, uint32 /*oldArea*/, uint32 /*newArea*/) {}
 
+    //Called when a player enters/leaves water bodies.
+    virtual void OnPlayerInWaterStateUpdate(Player* /*player*/, bool /*inWater*/) {}
+
     //Handle open / close objects
     //use HandleGameObject(ObjectGuid::Empty, boolen, GO); in OnObjectCreate in instance scripts
     //use HandleGameObject(GUID, boolen, nullptr); in any other script

src/server/scripts/Kalimdor/CavernsOfTime/BattleForMountHyjal/hyjal.h

@@ -144,7 +144,11 @@ enum HyjalMisc
     START_WAVE_HORDE_RETREAT    = 39,
     START_WAVE_NIGHT_ELF        = 42,
 
-    CONTEXT_GROUP_WAVES         = 1
+    CONTEXT_GROUP_WAVES         = 1,
+
+    AREA_NORDRASSIL             = 3710,
+
+    SPELL_ETERNAL_SILENCE       = 42201
 };
 
 enum HyjalPaths

src/server/scripts/Kalimdor/CavernsOfTime/BattleForMountHyjal/instance_hyjal.cpp

@@ -19,6 +19,7 @@
 #include "InstanceMapScript.h"
 #include "InstanceScript.h"
 #include "Opcodes.h"
+#include "Player.h"
 #include "WorldPacket.h"
 #include "hyjal.h"
 
@@ -530,6 +531,14 @@ public:
             _scheduler.Update(diff);
         }
 
+        void OnPlayerInWaterStateUpdate(Player* player, bool inWater) override
+        {
+            if (inWater && player->GetAreaId() == AREA_NORDRASSIL)
+            {
+                player->CastSpell(player, SPELL_ETERNAL_SILENCE, true);
+            }
+        }
+
     protected:
         int32 trash;
         uint8 _currentWave;