fix(Core/Spells): apply SPELLFAMILY_GENERIC mods to spells by default (#24996)

Co-authored-by: ariel- <ariel-@users.noreply.github.com>

src/server/game/Spells/Auras/SpellAuraEffects.cpp

@@ -1105,14 +1105,12 @@ bool AuraEffect::IsAffectedOnSpell(SpellInfo const* spell) const
 {
     if (!spell)
         return false;
-    // Check family name
-    if (spell->SpellFamilyName != m_spellInfo->SpellFamilyName)
+
+    // Check family name and EffectClassMask
+    if (!spell->IsAffected(m_spellInfo->SpellFamilyName, m_spellInfo->Effects[m_effIndex].SpellClassMask))
         return false;
 
-    // Check EffectClassMask
-    if (m_spellInfo->Effects[m_effIndex].SpellClassMask & spell->SpellFamilyFlags)
-        return true;
-    return false;
+    return true;
 }
 
 bool AuraEffect::HasSpellClassMask() const

src/server/game/Spells/SpellInfo.cpp

@@ -1285,6 +1285,20 @@ bool SpellInfo::IsAutoRepeatRangedSpell() const
     return AttributesEx2 & SPELL_ATTR2_AUTO_REPEAT;
 }
 
+bool SpellInfo::IsAffected(uint32 familyName, flag96 const& familyFlags) const
+{
+    if (!familyName)
+        return true;
+
+    if (familyName != SpellFamilyName)
+        return false;
+
+    if (familyFlags && !(familyFlags & SpellFamilyFlags))
+        return false;
+
+    return true;
+}
+
 bool SpellInfo::IsAffectedBySpellMods() const
 {
     return !(AttributesEx3 & SPELL_ATTR3_IGNORE_CASTER_MODIFIERS);
@@ -1300,23 +1314,12 @@ bool SpellInfo::IsAffectedBySpellMod(SpellModifier const* mod) const
     SpellInfo const* affectSpell = sSpellMgr->GetSpellInfo(mod->spellId);
 
     if (!affectSpell)
-    {
         return false;
-    }
 
     if (!sScriptMgr->OnIsAffectedBySpellModCheck(affectSpell, this, mod))
-    {
         return true;
-    }
 
-    // False if affect_spell == nullptr or spellFamily not equal
-    if (affectSpell->SpellFamilyName != SpellFamilyName)
-        return false;
-
-    if (mod->mask && !(mod->mask & SpellFamilyFlags))
-        return false;
-
-    return true;
+    return IsAffected(affectSpell->SpellFamilyName, mod->mask);
 }
 
 bool SpellInfo::CanPierceImmuneAura(SpellInfo const* aura) const

src/server/game/Spells/SpellInfo.h

@@ -466,6 +466,8 @@ public:
     bool IsRangedWeaponSpell() const;
     bool IsAutoRepeatRangedSpell() const;
 
+    [[nodiscard]] bool IsAffected(uint32 familyName, flag96 const& familyFlags) const;
+
     bool IsAffectedBySpellMods() const;
     bool IsAffectedBySpellMod(SpellModifier const* mod) const;
 

src/server/game/Spells/SpellMgr.cpp

@@ -823,17 +823,10 @@ bool SpellMgr::CanSpellTriggerProcOnEvent(SpellProcEntry const& procEntry, ProcE
 
     // check spell family name/flags (if set) for spells
     if (eventInfo.GetTypeMask() & SPELL_PROC_FLAG_MASK)
-    {
         if (SpellInfo const* eventSpellInfo = eventInfo.GetSpellInfo())
-        {
-            if (procEntry.SpellFamilyName && procEntry.SpellFamilyName != eventSpellInfo->SpellFamilyName)
+            if (!eventSpellInfo->IsAffected(procEntry.SpellFamilyName, procEntry.SpellFamilyMask))
                 return false;
 
-            if (procEntry.SpellFamilyMask && !(procEntry.SpellFamilyMask & eventSpellInfo->SpellFamilyFlags))
-                return false;
-        }
-    }
-
     // check spell type mask (if set)
     if (eventInfo.GetTypeMask() & (SPELL_PROC_FLAG_MASK | PERIODIC_PROC_FLAG_MASK))
     {

src/test/server/game/Spells/SpellProcTest.cpp

@@ -790,6 +790,52 @@ TEST_F(SpellProcTest, CanSpellTriggerProcOnEvent_SpellFamilyFlagsZeroAcceptsAll)
     EXPECT_TRUE(sSpellMgr->CanSpellTriggerProcOnEvent(procEntry, eventInfo));
 }
 
+TEST_F(SpellProcTest, CanSpellTriggerProcOnEvent_GenericFamilyIgnoresMask)
+{
+    // Generic family (0) should bypass family mask checks entirely
+    auto* spellInfo = SpellInfoBuilder()
+        .WithId(101)
+        .WithSpellFamilyName(SPELLFAMILY_MAGE)
+        .WithSpellFamilyFlags(0x1, 0, 0) // some mage flag
+        .Build();
+    _spellInfos.push_back(spellInfo);
+
+    DamageInfo damageInfo(nullptr, nullptr, 100, spellInfo, SPELL_SCHOOL_MASK_FIRE, SPELL_DIRECT_DAMAGE);
+
+    auto procEntry = SpellProcEntryBuilder()
+        .WithProcFlags(PROC_FLAG_DONE_SPELL_MAGIC_DMG_CLASS_NEG)
+        .WithSpellFamilyName(0) // generic family
+        .WithSpellFamilyMask(flag96(0x2, 0, 0)) // does NOT match the spell's flags
+        .WithSpellPhaseMask(PROC_SPELL_PHASE_HIT)
+        .Build();
+
+    auto eventInfo = ProcEventInfoBuilder()
+        .WithTypeMask(PROC_FLAG_DONE_SPELL_MAGIC_DMG_CLASS_NEG)
+        .WithSpellPhaseMask(PROC_SPELL_PHASE_HIT)
+        .WithHitMask(PROC_HIT_NORMAL)
+        .WithDamageInfo(&damageInfo)
+        .Build();
+
+    EXPECT_TRUE(sSpellMgr->CanSpellTriggerProcOnEvent(procEntry, eventInfo))
+        << "Generic family entries should ignore mask restrictions";
+}
+
+TEST_F(SpellProcTest, SpellInfo_IsAffected_GenericBehavior)
+{
+    auto* spellInfo = SpellInfoBuilder()
+        .WithId(102)
+        .WithSpellFamilyName(SPELLFAMILY_WARLOCK)
+        .WithSpellFamilyFlags(0x4, 0, 0)
+        .Build();
+    _spellInfos.push_back(spellInfo);
+
+    // generic family should return true regardless of mask
+    EXPECT_TRUE(spellInfo->IsAffected(0, flag96(0x4, 0, 0)));
+    EXPECT_TRUE(spellInfo->IsAffected(0, flag96(0x8, 0, 0)));
+    // a non-generic family still respects mask
+    EXPECT_FALSE(spellInfo->IsAffected(SPELLFAMILY_PALADIN, flag96(0x4, 0, 0)));
+}
+
 // =============================================================================
 // Real-world Spell Proc Examples
 // =============================================================================