fix(Scripts/Spells): Linken's boomerang (#8179)

* fix(Scripts/Spells): Linken's boomerang

* Update rev_1633027575141830731.sql

data/sql/updates/pending_db_world/rev_1633027575141830731.sql

@@ -0,0 +1,5 @@
+INSERT INTO `version_db_world` (`sql_rev`) VALUES ('1633027575141830731');
+
+DELETE FROM `spell_script_names` WHERE `spell_id` = 15712 AND `ScriptName` = 'spell_item_linken_boomerang';
+INSERT INTO `spell_script_names` (`spell_id`, `ScriptName`) VALUES (15712, 'spell_item_linken_boomerang');
+

src/server/scripts/Spells/spell_item.cpp

@@ -4395,6 +4395,73 @@ public:
     }
 };
 
+enum LinkenBoomerang
+{
+    SPELL_DISARM  = 15752,
+    SPELL_STUN    = 15753,
+    CHANCE_TO_HIT = 3
+};
+
+class spell_item_linken_boomerang : public SpellScriptLoader
+{
+public:
+    spell_item_linken_boomerang() : SpellScriptLoader("spell_item_linken_boomerang") {}
+
+    class spell_item_linken_boomerang_SpellScript : public SpellScript
+    {
+        PrepareSpellScript(spell_item_linken_boomerang_SpellScript)
+
+        bool Validate(SpellInfo const* /*spellInfo*/) override
+        {
+            return ValidateSpellInfo({SPELL_DISARM, SPELL_STUN});
+        }
+
+        void OnEffectHitTargetDisarm(SpellEffIndex effIndex)
+        {
+            PreventHitDefaultEffect(effIndex);
+        }
+
+        void OnEffectHitTargetStun(SpellEffIndex effIndex)
+        {
+            PreventHitDefaultEffect(effIndex);
+        }
+
+        void OnEffectLaunchTargetDisarm(SpellEffIndex effIndex)
+        {
+            PreventHitDefaultEffect(effIndex);
+
+            if (roll_chance_i(CHANCE_TO_HIT)) // 3% from wiki
+            {
+                GetCaster()->CastSpell(GetHitUnit(), SPELL_DISARM, true);
+            }
+        }
+
+        void OnEffectLaunchTargetStun(SpellEffIndex effIndex)
+        {
+            PreventHitDefaultEffect(effIndex);
+
+            if (roll_chance_i(CHANCE_TO_HIT)) // 3% from wiki
+            {
+                GetCaster()->CastSpell(GetHitUnit(), SPELL_STUN, true);
+            }
+        }
+
+        void Register() override
+        {
+            OnEffectLaunchTarget += SpellEffectFn(spell_item_linken_boomerang_SpellScript::OnEffectLaunchTargetDisarm, EFFECT_1, SPELL_EFFECT_TRIGGER_SPELL);
+            OnEffectLaunchTarget += SpellEffectFn(spell_item_linken_boomerang_SpellScript::OnEffectLaunchTargetStun, EFFECT_2, SPELL_EFFECT_TRIGGER_SPELL);
+
+            OnEffectHitTarget += SpellEffectFn(spell_item_linken_boomerang_SpellScript::OnEffectHitTargetDisarm, EFFECT_1, SPELL_EFFECT_TRIGGER_SPELL);
+            OnEffectHitTarget += SpellEffectFn(spell_item_linken_boomerang_SpellScript::OnEffectHitTargetStun, EFFECT_2, SPELL_EFFECT_TRIGGER_SPELL);
+        }
+    };
+
+    SpellScript* GetSpellScript() const override
+    {
+        return new spell_item_linken_boomerang_SpellScript();
+    }
+};
+
 void AddSC_item_spell_scripts()
 {
     // Ours
@@ -4504,4 +4571,5 @@ void AddSC_item_spell_scripts()
     new spell_item_greatmothers_soulcatcher();
     new spell_item_eggnog();
     new spell_item_goblin_bomb();
+    new spell_item_linken_boomerang();
 }