fix(Scripts/Underbog): Underbog Shambler's Allergies should periodica… (#14563)

data/sql/updates/pending_db_world/rev_1673174470902575400.sql

@@ -0,0 +1,2 @@
+--
+UPDATE `spell_script_names` SET `ScriptName`='spell_allergies' WHERE `spell_id`=31427;

src/server/scripts/Outland/CoilfangReservoir/underbog/boss_the_black_stalker.cpp

@@ -142,28 +142,6 @@ struct boss_the_black_stalker : public BossAI
     }
 };
 
-class spell_gen_allergies : public AuraScript
-{
-    PrepareAuraScript(spell_gen_allergies);
-
-    void CalcPeriodic(AuraEffect const* /*effect*/, bool& isPeriodic, int32& amplitude)
-    {
-        isPeriodic = true;
-        amplitude = urand(10 * IN_MILLISECONDS, 200 * IN_MILLISECONDS);
-    }
-
-    void Update(AuraEffect*  /*effect*/)
-    {
-        SetDuration(0);
-    }
-
-    void Register() override
-    {
-        DoEffectCalcPeriodic += AuraEffectCalcPeriodicFn(spell_gen_allergies::CalcPeriodic, EFFECT_0, SPELL_AURA_DUMMY);
-        OnEffectUpdatePeriodic += AuraEffectUpdatePeriodicFn(spell_gen_allergies::Update, EFFECT_0, SPELL_AURA_DUMMY);
-    }
-};
-
 // 31704 - Levitate
 class spell_the_black_stalker_levitate : public SpellScript
 {
@@ -252,7 +230,6 @@ class spell_the_black_stalker_magnetic_pull : public SpellScript
 void AddSC_boss_the_black_stalker()
 {
     RegisterUnderbogCreatureAI(boss_the_black_stalker);
-    RegisterSpellScript(spell_gen_allergies);
     RegisterSpellScript(spell_the_black_stalker_levitate);
     RegisterSpellScript(spell_the_black_stalker_levitation_pulse);
     RegisterSpellScript(spell_the_black_stalker_someone_grab_me);

src/server/scripts/Outland/CoilfangReservoir/underbog/underbog.cpp

@@ -40,7 +40,38 @@ class spell_fungal_decay : public AuraScript
     }
 };
 
+enum AllergiesEnum
+{
+    SPELL_SNEEZE    = 31428
+};
+
+class spell_allergies : public AuraScript
+{
+    PrepareAuraScript(spell_allergies);
+
+    void CalcPeriodic(AuraEffect const* /*effect*/, bool& isPeriodic, int32& amplitude)
+    {
+        isPeriodic = true;
+        amplitude = urand(10 * IN_MILLISECONDS, 60 * IN_MILLISECONDS);
+    }
+
+    void Update(AuraEffect* /*effect*/)
+    {
+        if (Unit* target = GetUnitOwner())
+        {
+            target->CastSpell(target, SPELL_SNEEZE, true);
+        }
+    }
+
+    void Register() override
+    {
+        DoEffectCalcPeriodic += AuraEffectCalcPeriodicFn(spell_allergies::CalcPeriodic, EFFECT_0, SPELL_AURA_DUMMY);
+        OnEffectUpdatePeriodic += AuraEffectUpdatePeriodicFn(spell_allergies::Update, EFFECT_0, SPELL_AURA_DUMMY);
+    }
+};
+
 void AddSC_underbog()
 {
     RegisterSpellScript(spell_fungal_decay);
+    RegisterSpellScript(spell_allergies);
 }