Core/Spells: refactor spell_enchant_proc_data table

Port From (https://github.com/TrinityCore/TrinityCore/commit/420f2e8ec2c5f19db313492c52a730c87fa2dab6)

Source/Framework/Constants/Spells/SpellConst.cs

@@ -2502,4 +2502,10 @@ namespace Framework.Constants
         AutoRemove = 0x2, // if has autoremove, spell is remove automatically inside zone/area (always removed on leaving area or zone)
         IgnoreAutocastOnQuestStatusChange = 0x4, // if this flag is set then spell will not be applied automatically on quest status change
     }
+
+    public enum EnchantProcAttributes
+    {
+        WhiteHit = 0x01, // enchant shall only proc off white hits (not abilities)
+        Limit60 = 0x02  // enchant effects shall be reduced past lvl 60
+    }
 }

Source/Game/Entities/Player/Player.Spells.cs

@@ -3324,10 +3324,10 @@ namespace Game.Entities
 
                     SpellEnchantProcEntry entry = Global.SpellMgr.GetSpellEnchantProcEvent(enchant_id);
 
-                    if (entry != null && entry.procEx != 0)
+                    if (entry != null && entry.HitMask != 0)
                     {
                         // Check hit/crit/dodge/parry requirement
-                        if (((uint)entry.procEx & (uint)damageInfo.GetHitMask()) == 0)
+                        if (((uint)entry.HitMask & (uint)damageInfo.GetHitMask()) == 0)
                             continue;
                     }
                     else
@@ -3337,6 +3337,10 @@ namespace Game.Entities
                             continue;
                     }
 
+                    // check if enchant procs only on white hits
+                    if (entry != null && entry.AttributesMask.HasAnyFlag(EnchantProcAttributes.WhiteHit) && damageInfo.GetSpellInfo() != null)
+                        continue;
+
                     SpellInfo spellInfo = Global.SpellMgr.GetSpellInfo(pEnchant.EffectArg[s]);
                     if (spellInfo == null)
                     {
@@ -3349,10 +3353,10 @@ namespace Game.Entities
 
                     if (entry != null)
                     {
-                        if (entry.PPMChance != 0)
-                            chance = GetPPMProcChance(proto.GetDelay(), entry.PPMChance, spellInfo);
-                        else if (entry.customChance != 0)
-                            chance = entry.customChance;
+                        if (entry.ProcsPerMinute != 0)
+                            chance = GetPPMProcChance(proto.GetDelay(), entry.ProcsPerMinute, spellInfo);
+                        else if (entry.Chance != 0)
+                            chance = entry.Chance;
                     }
 
                     // Apply spell mods
@@ -3369,6 +3373,29 @@ namespace Game.Entities
                         else
                             CastSpell(damageInfo.GetVictim(), spellInfo, true, item);
                     }
+
+                    if (RandomHelper.randChance(chance))
+                    {
+                        Unit target = spellInfo.IsPositive() ? this : damageInfo.GetVictim();
+
+                        // reduce effect values if enchant is limited
+                        Dictionary<SpellValueMod, int> values = new Dictionary<SpellValueMod, int>();
+                        if (entry != null && entry.AttributesMask.HasAnyFlag(EnchantProcAttributes.Limit60) && target.GetLevelForTarget(this) > 60)
+                        {
+                            int lvlDifference = (int)target.GetLevelForTarget(this) - 60;
+                            int lvlPenaltyFactor = 4; // 4% lost effectiveness per level
+
+                            int effectPct = Math.Max(0, 100 - (lvlDifference * lvlPenaltyFactor));
+
+                            for (byte i = 0; i < SpellConst.MaxEffects; ++i)
+                            {
+                                if (spellInfo.GetEffect(Difficulty.None, i).IsEffect())
+                                    values.Add(SpellValueMod.BasePoint0 + i, MathFunctions.CalculatePct(spellInfo.GetEffect(Difficulty.None, i).CalcValue(this), effectPct));
+                            }
+                        }
+
+                        CastCustomSpell(spellInfo.Id, values, target, TriggerCastFlags.FullMask, item);
+                    }
                 }
             }
         }

Source/Game/Spells/SpellManager.cs

@@ -1548,8 +1548,8 @@ namespace Game.Entities
 
             mSpellEnchantProcEventMap.Clear();                             // need for reload case
 
-            //                                                  0         1           2         3
-            SQLResult result = DB.World.Query("SELECT entry, customChance, PPMChance, procEx FROM spell_enchant_proc_data");
+            //                                         0          1       2               3        4
+            SQLResult result = DB.World.Query("SELECT EnchantID, Chance, ProcsPerMinute, HitMask, AttributesMask FROM spell_enchant_proc_data");
             if (result.IsEmpty())
             {
                 Log.outInfo(LogFilter.ServerLoading, "Loaded 0 spell enchant proc event conditions. DB table `spell_enchant_proc_data` is empty.");
@@ -1569,9 +1569,10 @@ namespace Game.Entities
                 }
 
                 SpellEnchantProcEntry spe = new SpellEnchantProcEntry();
-                spe.customChance = result.Read<uint>(1);
-                spe.PPMChance = result.Read<float>(2);
-                spe.procEx = result.Read<uint>(3);
+                spe.Chance = result.Read<uint>(1);
+                spe.ProcsPerMinute = result.Read<float>(2);
+                spe.HitMask = result.Read<uint>(3);
+                spe.AttributesMask = (EnchantProcAttributes)result.Read<uint>(4);
 
                 mSpellEnchantProcEventMap[enchantId] = spe;
 
@@ -3609,9 +3610,10 @@ namespace Game.Entities
 
     public class SpellEnchantProcEntry
     {
-        public uint customChance;
-        public float PPMChance;
-        public uint procEx;
+        public float Chance;         // if nonzero - overwrite SpellItemEnchantment value
+        public float ProcsPerMinute; // if nonzero - chance to proc is equal to value * aura caster's weapon speed / 60
+        public uint HitMask;        // if nonzero - bitmask for matching proc condition based on hit result, see enum ProcFlagsHit
+        public EnchantProcAttributes AttributesMask; // bitmask, see EnchantProcAttributes
     }
 
     public class SpellTargetPosition