Core/Spells: Updated silence flags for 9.0 and rename unit flag to its new meaning

Port From (https://github.com/TrinityCore/TrinityCore/commit/3400c5a52c8ea35e56d57326f904dc0127c33048)

Source/Framework/Constants/CreatureConst.cs

@@ -48,7 +48,7 @@ namespace Framework.Constants
         Looting = 0x400,
         PetInCombat = 0x800,
         PvpEnabling = 0x1000,
-        Silenced = 0x2000,
+        ForceNameplate = 0x2000,
         CantSwim = 0x4000,
         CanSwim = 0x8000, // shows swim animation in water
         NonAttackable2 = 0x10000,
@@ -71,7 +71,7 @@ namespace Framework.Constants
         Disallowed = (ServerControlled | NonAttackable | RemoveClientControl |
                                    PlayerControlled | Rename | Preparation | /* UNIT_FLAG_UNK_6 | */
                                    NotAttackable1 | Looting | PetInCombat | PvpEnabling |
-                                   Silenced | NonAttackable2 | Pacified | Stunned |
+                                   NonAttackable2 | Pacified | Stunned |
                                    InCombat | OnTaxi | Disarmed | Confused | Fleeing |
                                    Possessed | Skinnable | Mount | Unk28 |
                                    PreventEmotesFromChatText | Sheathe | Immune),

Source/Game/AI/ScriptedAI/ScriptedAI.cs

@@ -258,7 +258,7 @@ namespace Game.AI
                 return null;
 
             //Silenced so we can't cast
-            if (me.HasUnitFlag(UnitFlags.Silenced))
+            if (me.IsSilenced(school != 0 ? school : SpellSchoolMask.Magic))
                 return null;
 
             //Using the extended script system we first create a list of viable spells

Source/Game/Entities/Player/Player.cs

@@ -5569,7 +5569,7 @@ namespace Game.Entities
             // cleanup unit flags (will be re-applied if need at aura load).
             RemoveUnitFlag(UnitFlags.NonAttackable | UnitFlags.RemoveClientControl | UnitFlags.NotAttackable1 |
             UnitFlags.ImmuneToPc | UnitFlags.ImmuneToNpc | UnitFlags.Looting |
-            UnitFlags.PetInCombat | UnitFlags.Silenced | UnitFlags.Pacified |
+            UnitFlags.PetInCombat | UnitFlags.Pacified |
             UnitFlags.Stunned | UnitFlags.InCombat | UnitFlags.Disarmed |
             UnitFlags.Confused | UnitFlags.Fleeing | UnitFlags.Uninteractible |
             UnitFlags.Skinnable | UnitFlags.Mount | UnitFlags.OnTaxi);

Source/Game/Entities/Unit/Unit.Spells.cs

@@ -923,6 +923,12 @@ namespace Game.Entities
             return base.GetCastSpellXSpellVisualId(spellInfo);
         }
 
+        public bool IsSilenced(SpellSchoolMask schoolMask) { return (m_unitData.SilencedSchoolMask & (uint)schoolMask) != 0; }
+
+        public void SetSilencedSchoolMask(SpellSchoolMask schoolMask) { SetUpdateFieldFlagValue(m_values.ModifyValue(m_unitData).ModifyValue(m_unitData.SilencedSchoolMask), (uint)schoolMask); }
+
+        public void ReplaceAllSilencedSchoolMask(SpellSchoolMask schoolMask) { SetUpdateFieldValue(m_values.ModifyValue(m_unitData).ModifyValue(m_unitData.SilencedSchoolMask), (uint)schoolMask); }
+        
         public SpellHistory GetSpellHistory() { return _spellHistory; }
 
         public static ProcFlagsHit CreateProcHitMask(SpellNonMeleeDamage damageInfo, SpellMissInfo missCondition)

Source/Game/Spells/Auras/AuraEffect.cs

@@ -1832,7 +1832,7 @@ namespace Game.Spells
 
             if (apply)
             {
-                target.SetUnitFlag(UnitFlags.Silenced);
+                target.SetSilencedSchoolMask((SpellSchoolMask)GetMiscValue());
 
                 // call functions which may have additional effects after changing state of unit
                 // Stop cast only spells vs PreventionType & SPELL_PREVENTION_TYPE_SILENCE
@@ -1847,11 +1847,14 @@ namespace Game.Spells
             }
             else
             {
-                // do not remove unit flag if there are more than this auraEffect of that kind on unit on unit
-                if (target.HasAuraType(AuraType.ModSilence) || target.HasAuraType(AuraType.ModPacifySilence))
-                    return;
+                int silencedSchoolMask = 0;
+                foreach (AuraEffect auraEffect in target.GetAuraEffectsByType(AuraType.ModSilence))
+                    silencedSchoolMask |= auraEffect.GetMiscValue();
 
-                target.RemoveUnitFlag(UnitFlags.Silenced);
+                foreach (AuraEffect auraEffect in target.GetAuraEffectsByType(AuraType.ModPacifySilence))
+                    silencedSchoolMask |= auraEffect.GetMiscValue();
+
+                target.ReplaceAllSilencedSchoolMask((SpellSchoolMask)silencedSchoolMask);
             }
         }
 

Source/Game/Spells/Spell.cs

@@ -5909,7 +5909,7 @@ namespace Game.Spells
                 else if ((m_spellInfo.Mechanic & Mechanics.ImmuneShield) != 0 && m_caster.IsUnit() && m_caster.ToUnit().HasAuraWithMechanic(1 << (int)Mechanics.Banish))
                     result = SpellCastResult.Stunned;
             }
-            else if (unitflag.HasAnyFlag(UnitFlags.Silenced) && m_spellInfo.PreventionType.HasAnyFlag(SpellPreventionType.Silence) && !CheckSpellCancelsSilence(ref param1))
+            else if (unitCaster.IsSilenced(m_spellSchoolMask) && (m_spellInfo.PreventionType & SpellPreventionType.Silence) != 0 && !CheckSpellCancelsSilence(ref param1))
                 result = SpellCastResult.Silenced;
             else if (unitflag.HasAnyFlag(UnitFlags.Pacified) && m_spellInfo.PreventionType.HasAnyFlag(SpellPreventionType.Pacify) && !CheckSpellCancelsPacify(ref param1))
                 result = SpellCastResult.Pacified;