fix(Scripts/ZulGurub): Improvements to Gah'zranka: (#11908)

Summoned Mudskunk Lure object and added visual splash.
Added pathing to Gahzranka
Corrected visual coordinates.
Gahzranka can be summoned only once per instance.
Fixes #11560

data/sql/updates/pending_db_world/rev_1653819851783034500.sql

@@ -0,0 +1,12 @@
+--
+UPDATE `spell_target_position` SET `PositionX`=-11688.5, `PositionY`=-1737.74, `PositionZ`=8.409842 WHERE `id` IN (24325, 24593);
+DELETE FROM `event_scripts` WHERE `id`=9104;
+
+DELETE FROM `spell_script_names` WHERE `spell_id`=24325;
+INSERT INTO `spell_script_names` VALUES
+(24325, 'spell_pagles_point_cast');
+
+DELETE FROM `waypoint_data` WHERE `id`=151140;
+INSERT INTO `waypoint_data`  VALUES
+(151140,1,-11697.263,-1759.001,10.364448,0,0,0,0,100,0),
+(151140,2,-11689.899,-1776.087,12.593142,6.098,0,0,0,100,0);

src/server/scripts/EasternKingdoms/ZulGurub/boss_gahzranka.cpp

@@ -32,7 +32,8 @@ enum Spells
     SPELL_FROSTBREATH               = 16099,
     SPELL_MASSIVEGEYSER             = 22421,
     SPELL_SLAM                      = 24326,
-    SPELL_THRASH                    = 3417 // Triggers 3391
+    SPELL_THRASH                    = 3417, // Triggers 3391
+    SPELL_SPLASH                    = 24593
 };
 
 enum Events
@@ -42,6 +43,11 @@ enum Events
     EVENT_SLAM                      = 3
 };
 
+enum Misc
+{
+    GAMEOBJECT_MUDSKUNK_LURE        = 180346
+};
+
 class boss_gahzranka : public CreatureScript
 {
 public:
@@ -51,6 +57,11 @@ public:
     {
         boss_gahzrankaAI(Creature* creature) : BossAI(creature, DATA_GAHZRANKA) { }
 
+        void IsSummonedBy(Unit* /*summoner*/) override
+        {
+            me->GetMotionMaster()->MovePath(me->GetEntry() * 10, false);
+        }
+
         void Reset() override
         {
             _Reset();
@@ -147,8 +158,45 @@ private:
     bool _wipeThreat = false;
 };
 
+class spell_pagles_point_cast : public SpellScript
+{
+    PrepareSpellScript(spell_pagles_point_cast);
+
+    void OnEffect(SpellEffIndex /*effIndex*/)
+    {
+        if (Unit* caster = GetCaster())
+        {
+            if (InstanceScript* instanceScript = caster->GetInstanceScript())
+            {
+                if (!instanceScript->GetData(DATA_GAHZRANKA))
+                {
+                    caster->m_Events.AddEventAtOffset([caster]()
+                    {
+                        if (GameObject* lure = caster->SummonGameObject(GAMEOBJECT_MUDSKUNK_LURE, -11688.5f, -1737.74f, 10.409842f, 1.f, 0.f, 0.f, 0.f, 0.f, 30 * IN_MILLISECONDS))
+                        {
+                            caster->m_Events.AddEventAtOffset([caster, lure]()
+                            {
+                                if (lure)
+                                    lure->DespawnOrUnsummon();
+                                caster->CastSpell(caster, SPELL_SPLASH, true);
+                                caster->SummonCreature(NPC_GAHZRANKA, -11688.5f, -1723.74f, -5.78f, 0.f, TEMPSUMMON_TIMED_DESPAWN_OUT_OF_COMBAT, 5 * DAY * IN_MILLISECONDS);
+                            }, 5s);
+                        }
+                    }, 2s);
+                }
+            }
+        }
+    }
+
+    void Register() override
+    {
+        OnEffectLaunch += SpellEffectFn(spell_pagles_point_cast::OnEffect, EFFECT_1, SPELL_EFFECT_SEND_EVENT);
+    }
+};
+
 void AddSC_boss_gahzranka()
 {
     new boss_gahzranka();
     RegisterSpellScript(spell_gahzranka_slam);
+    RegisterSpellScript(spell_pagles_point_cast);
 }

src/server/scripts/EasternKingdoms/ZulGurub/instance_zulgurub.cpp

@@ -79,6 +79,11 @@ public:
                         marli->AI()->JustSummoned(creature);
                     }
                     break;
+                case NPC_GAHZRANKA:
+                    _gahzrankaGUID = creature->GetGUID();
+                    break;
+                default:
+                    break;
             }
 
             InstanceScript::OnCreatureCreate(creature);
@@ -119,6 +124,16 @@ public:
             return ObjectGuid::Empty;
         }
 
+        uint32 GetData(uint32 type) const override
+        {
+            if (type == DATA_GAHZRANKA)
+            {
+                return _gahzrankaGUID || GetBossState(DATA_GAHZRANKA) == DONE;
+            }
+
+            return 0;
+        }
+
         std::string GetSaveData() override
         {
             OUT_SAVE_INST_DATA;
@@ -170,6 +185,7 @@ public:
         ObjectGuid _arlokkGUID;
         ObjectGuid _goGongOfBethekkGUID;
         ObjectGuid _hakkarGUID;
+        ObjectGuid _gahzrankaGUID;
     };
 
     InstanceScript* GetInstanceScript(InstanceMap* map) const override

src/server/scripts/EasternKingdoms/ZulGurub/zulgurub.h

@@ -62,7 +62,8 @@ enum CreatureIds
     NPC_CHAINED_SPIRIT      = 15117, // Mandokir Event
     NPC_HAKKAR              = 14834,
     NPC_ZULGURUB_TIGER      = 11361,
-    NPC_BRAIN_WASH_TOTEM    = 15112
+    NPC_BRAIN_WASH_TOTEM    = 15112,
+    NPC_GAHZRANKA           = 15114
 };
 
 enum GameobjectIds