fix(Core/Spell): Handle ClearAllDebuffs (#5006)

data/sql/updates/pending_db_world/rev_1616715058536439500.sql

@@ -0,0 +1,5 @@
+INSERT INTO `version_db_world` (`sql_rev`) VALUES ('1616715058536439500');
+
+DELETE FROM `spell_script_names` WHERE `ScriptName` = 'spell_gen_clear_debuffs';
+INSERT INTO `spell_script_names` (`spell_id`, `ScriptName`) VALUES 
+(34098, 'spell_gen_clear_debuffs');

src/server/game/Entities/Unit/Unit.cpp

@@ -4427,6 +4427,19 @@ void Unit::RemoveAura(Aura* aura, AuraRemoveMode mode)
         RemoveAura(aurApp, mode);
 }
 
+void Unit::RemoveOwnedAuras(std::function<bool(Aura const*)> const& check)
+{
+    for (AuraMap::iterator iter = m_ownedAuras.begin(); iter != m_ownedAuras.end();)
+    {
+        if (check(iter->second))
+        {
+            RemoveOwnedAura(iter);
+            continue;
+        }
+        ++iter;
+    }
+}
+
 void Unit::RemoveAppliedAuras(std::function<bool(AuraApplication const*)> const& check)
 {
     for (AuraApplicationMap::iterator iter = m_appliedAuras.begin(); iter != m_appliedAuras.end();)
@@ -4440,6 +4453,19 @@ void Unit::RemoveAppliedAuras(std::function<bool(AuraApplication const*)> const&
     }
 }
 
+void Unit::RemoveOwnedAuras(uint32 spellId, std::function<bool(Aura const*)> const& check)
+{
+    for (AuraMap::iterator iter = m_ownedAuras.lower_bound(spellId); iter != m_ownedAuras.upper_bound(spellId);)
+    {
+        if (check(iter->second))
+        {
+            RemoveOwnedAura(iter);
+            continue;
+        }
+        ++iter;
+    }
+}
+
 void Unit::RemoveAppliedAuras(uint32 spellId, std::function<bool(AuraApplication const*)> const& check)
 {
     for (AuraApplicationMap::iterator iter = m_appliedAuras.lower_bound(spellId); iter != m_appliedAuras.upper_bound(spellId);)

src/server/game/Entities/Unit/Unit.h

@@ -1971,6 +1971,14 @@ public:
     void RemoveAura(AuraApplication* aurApp, AuraRemoveMode mode = AURA_REMOVE_BY_DEFAULT);
     void RemoveAura(Aura* aur, AuraRemoveMode mode = AURA_REMOVE_BY_DEFAULT);
 
+    // Convenience methods removing auras by predicate
+    void RemoveAppliedAuras(std::function<bool(AuraApplication const*)> const& check);
+    void RemoveOwnedAuras(std::function<bool(Aura const*)> const& check);
+
+    // Optimized overloads taking advantage of map key
+    void RemoveAppliedAuras(uint32 spellId, std::function<bool(AuraApplication const*)> const& check);
+    void RemoveOwnedAuras(uint32 spellId, std::function<bool(Aura const*)> const& check);
+
     void RemoveAurasDueToSpell(uint32 spellId, uint64 casterGUID = 0, uint8 reqEffMask = 0, AuraRemoveMode removeMode = AURA_REMOVE_BY_DEFAULT);
     void RemoveAuraFromStack(uint32 spellId, uint64 casterGUID = 0, AuraRemoveMode removeMode = AURA_REMOVE_BY_DEFAULT);
     void RemoveAurasDueToSpellByDispel(uint32 spellId, uint32 dispellerSpellId, uint64 casterGUID, Unit* dispeller, uint8 chargesRemoved = 1);
@@ -1985,12 +1993,6 @@ public:
     void RemoveMovementImpairingAuras(bool withRoot);
     void RemoveAurasByShapeShift();
 
-    // Convenience methods removing auras by predicate
-    void RemoveAppliedAuras(std::function<bool(AuraApplication const*)> const& check);
-
-    // Optimized overloads taking advantage of map key
-    void RemoveAppliedAuras(uint32 spellId, std::function<bool(AuraApplication const*)> const& check);
-
     void RemoveAreaAurasDueToLeaveWorld();
     void RemoveAllAuras();
     void RemoveArenaAuras();

src/server/scripts/Spells/spell_generic.cpp

@@ -1745,6 +1745,40 @@ public:
     }
 };
 
+// 34098 - ClearAllDebuffs
+class spell_gen_clear_debuffs : public SpellScriptLoader
+{
+public:
+    spell_gen_clear_debuffs() : SpellScriptLoader("spell_gen_clear_debuffs") { }
+
+    class spell_gen_clear_debuffs_SpellScript : public SpellScript
+    {
+        PrepareSpellScript(spell_gen_clear_debuffs_SpellScript);
+
+        void HandleScript(SpellEffIndex /*effIndex*/)
+        {
+            if (Unit* target = GetHitUnit())
+            {
+                target->RemoveOwnedAuras([](Aura const* aura)
+                {
+                    SpellInfo const* spellInfo = aura->GetSpellInfo();
+                    return !spellInfo->IsPositive() && !spellInfo->IsPassive();
+                });
+            }
+        }
+
+        void Register() override
+        {
+            OnEffectHitTarget += SpellEffectFn(spell_gen_clear_debuffs_SpellScript::HandleScript, EFFECT_0, SPELL_EFFECT_SCRIPT_EFFECT);
+        }
+    };
+
+    SpellScript* GetSpellScript() const override
+    {
+        return new spell_gen_clear_debuffs_SpellScript();
+    }
+};
+
 // 63845 - Create Lance
 enum CreateLanceSpells
 {
@@ -5154,6 +5188,7 @@ void AddSC_generic_spell_scripts()
     new spell_gen_av_drekthar_presence();
     new spell_gen_burn_brutallus();
     new spell_gen_cannibalize();
+    new spell_gen_clear_debuffs();
     new spell_gen_create_lance();
     new spell_gen_netherbloom();
     new spell_gen_nightmare_vine();