fix(Core/SSC): Rancid Mushroom mechanic (#18008)

* fix(Core/SSC): Rancid Mushroom mechanic

* missing clear smart_scripts

* build

* build again

data/sql/updates/pending_db_world/rev_1702400889402948200.sql

@@ -0,0 +1,8 @@
+--
+UPDATE `creature_template` SET `scale` = 0.5, `unit_flags` = `unit_flags`|2048|524288, `mechanic_immune_mask` = 1073741823, `AIName` = '', `ScriptName` = 'npc_rancid_mushroom' WHERE `entry` = 22250;
+
+DELETE FROM `spell_script_names` WHERE `spell_id` = 38652 AND `ScriptName` = 'spell_rancid_spore_cloud';
+INSERT INTO `spell_script_names` (`spell_id`, `ScriptName`) VALUES
+(38652, 'spell_rancid_spore_cloud');
+
+DELETE FROM `smart_scripts` WHERE `entryorguid` = 22250 AND `source_type` = 0;

src/server/scripts/Outland/CoilfangReservoir/SerpentShrine/instance_serpent_shrine.cpp

@@ -22,6 +22,7 @@
 #include "SpellScriptLoader.h"
 #include "TemporarySummon.h"
 #include "serpent_shrine.h"
+#include "ScriptedCreature.h"
 
 DoorData const doorData[] =
 {
@@ -308,6 +309,52 @@ class spell_serpentshrine_cavern_coilfang_water : public AuraScript
     }
 };
 
+struct npc_rancid_mushroom : public ScriptedAI
+{
+    npc_rancid_mushroom(Creature* creature) : ScriptedAI(creature) { }
+
+    enum Spells : uint32
+    {
+        SPELL_GROW        = 31698,
+        SPELL_SPORE_CLOUD = 38652
+    };
+
+    void InitializeAI() override
+    {
+        scheduler.Schedule(1150ms, [this](TaskContext context)
+        {
+            DoCastSelf(SPELL_GROW);
+            context.Repeat(1200ms, 3400ms);
+        })
+        .Schedule(22950ms, [this](TaskContext /*context*/)
+        {
+            DoCastSelf(SPELL_SPORE_CLOUD);
+            me->KillSelf();
+        });
+    }
+
+    void UpdateAI(uint32 diff) override
+    {
+        scheduler.Update(diff);
+    }
+};
+
+class spell_rancid_spore_cloud : public AuraScript
+{
+    PrepareAuraScript(spell_rancid_spore_cloud);
+
+    void HandlePeriodic(AuraEffect const* /*aurEff*/)
+    {
+        PreventDefaultAction();
+        GetCaster()->CastSpell((Unit*)nullptr, GetSpellInfo()->Effects[EFFECT_0].TriggerSpell, true);
+    }
+
+    void Register() override
+    {
+        OnEffectPeriodic += AuraEffectPeriodicFn(spell_rancid_spore_cloud::HandlePeriodic, EFFECT_0, SPELL_AURA_PERIODIC_TRIGGER_SPELL);
+    }
+};
+
 void AddSC_instance_serpentshrine_cavern()
 {
     new instance_serpent_shrine();
@@ -315,5 +362,7 @@ void AddSC_instance_serpentshrine_cavern()
     RegisterSpellAndAuraScriptPair(spell_serpentshrine_cavern_serpentshrine_parasite_trigger, spell_serpentshrine_cavern_serpentshrine_parasite_trigger_aura);
     RegisterSpellScript(spell_serpentshrine_cavern_infection);
     RegisterSpellScript(spell_serpentshrine_cavern_coilfang_water);
+    RegisterSerpentShrineAI(npc_rancid_mushroom);
+    RegisterSpellScript(spell_rancid_spore_cloud);
 }