Core/Instances: Use level requirements from MapDifficultyXCondition.db2 instead of access_requirement db table

Port From (https://github.com/TrinityCore/TrinityCore/commit/3afed1788a81fe65ee414c590936be65d69f9314)

Source/Game/DataStorage/CliDB.cs

@@ -205,6 +205,7 @@ namespace Game.DataStorage
             MailTemplateStorage = ReadDB2<MailTemplateRecord>("MailTemplate.db2", HotfixStatements.SEL_MAIL_TEMPLATE, HotfixStatements.SEL_MAIL_TEMPLATE_LOCALE);
             MapStorage = ReadDB2<MapRecord>("Map.db2", HotfixStatements.SEL_MAP, HotfixStatements.SEL_MAP_LOCALE);
             MapDifficultyStorage = ReadDB2<MapDifficultyRecord>("MapDifficulty.db2", HotfixStatements.SEL_MAP_DIFFICULTY, HotfixStatements.SEL_MAP_DIFFICULTY_LOCALE);
+            MapDifficultyXConditionStorage = ReadDB2<MapDifficultyXConditionRecord>("MapDifficultyXCondition.db2", HotfixStatements.SEL_MAP_DIFFICULTY_X_CONDITION, HotfixStatements.SEL_MAP_DIFFICULTY_X_CONDITION_LOCALE);
             ModifierTreeStorage = ReadDB2<ModifierTreeRecord>("ModifierTree.db2", HotfixStatements.SEL_MODIFIER_TREE);
             MountCapabilityStorage = ReadDB2<MountCapabilityRecord>("MountCapability.db2", HotfixStatements.SEL_MOUNT_CAPABILITY);
             MountStorage = ReadDB2<MountRecord>("Mount.db2", HotfixStatements.SEL_MOUNT, HotfixStatements.SEL_MOUNT_LOCALE);
@@ -561,6 +562,7 @@ namespace Game.DataStorage
         public static DB6Storage<MailTemplateRecord> MailTemplateStorage;
         public static DB6Storage<MapRecord> MapStorage;
         public static DB6Storage<MapDifficultyRecord> MapDifficultyStorage;
+        public static DB6Storage<MapDifficultyXConditionRecord> MapDifficultyXConditionStorage;
         public static DB6Storage<ModifierTreeRecord> ModifierTreeStorage;
         public static DB6Storage<MountCapabilityRecord> MountCapabilityStorage;
         public static DB6Storage<MountRecord> MountStorage;

Source/Game/DataStorage/DB2Manager.cs

@@ -376,6 +376,19 @@ namespace Game.DataStorage
 
             CliDB.MapDifficultyStorage.Clear();
 
+            List<MapDifficultyXConditionRecord> mapDifficultyConditions = new List<MapDifficultyXConditionRecord>();
+            foreach (var mapDifficultyCondition in CliDB.MapDifficultyXConditionStorage.Values)
+                mapDifficultyConditions.Add(mapDifficultyCondition);
+
+            mapDifficultyConditions = mapDifficultyConditions.OrderBy(p => p.OrderIndex).ToList();
+
+            foreach (var mapDifficultyCondition in mapDifficultyConditions)
+            {
+                PlayerConditionRecord playerCondition = CliDB.PlayerConditionStorage.LookupByKey(mapDifficultyCondition.PlayerConditionID);
+                if (playerCondition != null)
+                    _mapDifficultyConditions.Add(mapDifficultyCondition.MapDifficultyID, Tuple.Create(mapDifficultyCondition.Id, playerCondition));
+            }
+
             foreach (var mount in CliDB.MountStorage.Values)
                 _mountsBySpellId[mount.SourceSpellID] = mount;
 
@@ -1674,12 +1687,17 @@ namespace Game.DataStorage
             return mapDiff;
         }
 
+        public List<Tuple<uint, PlayerConditionRecord>> GetMapDifficultyConditions(uint mapDifficultyId)
+        {
+            return _mapDifficultyConditions.LookupByKey(mapDifficultyId);
+        }
+        
         public MountRecord GetMount(uint spellId)
         {
             return _mountsBySpellId.LookupByKey(spellId);
         }
 
-        MountRecord GetMountById(uint id)
+        public MountRecord GetMountById(uint id)
         {
             return CliDB.MountStorage.LookupByKey(id);
         }
@@ -2286,6 +2304,7 @@ namespace Game.DataStorage
         MultiMap<uint, ItemSetSpellRecord> _itemSetSpells = new MultiMap<uint, ItemSetSpellRecord>();
         MultiMap<uint, ItemSpecOverrideRecord> _itemSpecOverrides = new MultiMap<uint, ItemSpecOverrideRecord>();
         Dictionary<uint, Dictionary<uint, MapDifficultyRecord>> _mapDifficulties = new Dictionary<uint, Dictionary<uint, MapDifficultyRecord>>();
+        MultiMap<uint, Tuple<uint, PlayerConditionRecord>> _mapDifficultyConditions = new MultiMap<uint, Tuple<uint, PlayerConditionRecord>>();
         Dictionary<uint, MountRecord> _mountsBySpellId = new Dictionary<uint, MountRecord>();
         MultiMap<uint, MountTypeXCapabilityRecord> _mountCapabilitiesByType = new MultiMap<uint, MountTypeXCapabilityRecord>();
         MultiMap<uint, MountXDisplayRecord> _mountDisplays = new MultiMap<uint, MountXDisplayRecord>();

Source/Game/DataStorage/Structs/M_Records.cs

@@ -116,6 +116,15 @@ namespace Game.DataStorage
         }
     }
 
+    public sealed class MapDifficultyXConditionRecord
+    {
+        public uint Id;
+        public LocalizedString FailureDescription;
+        public uint PlayerConditionID;
+        public int OrderIndex;
+        public uint MapDifficultyID;
+    }
+
     public sealed class ModifierTreeRecord
     {
         public uint Id;