From 588dce6bb0497e349fb6aac68c0a67a6560cb8a8 Mon Sep 17 00:00:00 2001
From: Shauren <shauren.trinity@gmail.com>
Date: Sun, 26 Jul 2020 12:44:44 +0200
Subject: Core/Entities: Support setting nested updatefield types like
 ActivePlayerData::Research

---
 .../game/Entities/Object/Updates/UpdateField.h     | 168 +++++++++++++++++++--
 .../game/Entities/Object/Updates/UpdateFields.h    |   2 +-
 2 files changed, 157 insertions(+), 13 deletions(-)

(limited to 'src')

diff --git a/src/server/game/Entities/Object/Updates/UpdateField.h b/src/server/game/Entities/Object/Updates/UpdateField.h
index 4dd17a01497..33fbfa07a67 100644
--- a/src/server/game/Entities/Object/Updates/UpdateField.h
+++ b/src/server/game/Entities/Object/Updates/UpdateField.h
@@ -40,12 +40,24 @@ namespace UF
 
     DEFINE_ENUM_FLAG(UpdateFieldFlag);
 
+    template<typename T>
+    class UpdateFieldBase;
+
     template<typename T, uint32 BlockBit, uint32 Bit>
     class UpdateField;
 
+    template<typename T>
+    class UpdateFieldArrayBaseWithoutSize;
+
+    template<typename T, std::size_t Size>
+    class UpdateFieldArrayBase;
+
     template<typename T, std::size_t Size, uint32 Bit, uint32 FirstElementBit>
     class UpdateFieldArray;
 
+    template<typename T>
+    class DynamicUpdateFieldBase;
+
     template<typename T, uint32 BlockBit, uint32 Bit>
     class DynamicUpdateField;
 
@@ -58,12 +70,18 @@ namespace UF
     template<typename T, bool PublicSet>
     struct MutableFieldReference;
 
+    template<typename T, bool PublicSet>
+    struct MutableNestedFieldReference;
+
     struct IsUpdateFieldStructureTag
     {
     };
     struct HasChangesMaskTag
     {
     };
+    struct IsUpdateFieldHolderTag
+    {
+    };
 
     template<typename T>
     struct UpdateFieldSetter
@@ -237,7 +255,9 @@ namespace UF
         std::enable_if_t<std::is_base_of<HasChangesMaskTag, U>::value,
             std::conditional_t<std::is_base_of<IsUpdateFieldStructureTag, V>::value,
             MutableFieldReference<V, PublicSet>,
-            std::conditional_t<PublicSet, UpdateFieldPublicSetter<V>, UpdateFieldSetter<V>>>>
+            std::conditional_t<std::is_base_of<IsUpdateFieldHolderTag, V>::value,
+            MutableNestedFieldReference<V, PublicSet>,
+            std::conditional_t<PublicSet, UpdateFieldPublicSetter<V>, UpdateFieldSetter<V>>>>>
             ModifyValue(UpdateField<V, BlockBit, Bit>(T::* field))
         {
             _value._changesMask.Set(BlockBit);
@@ -249,7 +269,9 @@ namespace UF
         std::enable_if_t<std::is_base_of<HasChangesMaskTag, U>::value,
             std::conditional_t<std::is_base_of<IsUpdateFieldStructureTag, V>::value,
             MutableFieldReference<V, PublicSet>,
-            std::conditional_t<PublicSet, UpdateFieldPublicSetter<V>, UpdateFieldSetter<V>>>>
+            std::conditional_t<std::is_base_of<IsUpdateFieldHolderTag, V>::value,
+            MutableNestedFieldReference<V, PublicSet>,
+            std::conditional_t<PublicSet, UpdateFieldPublicSetter<V>, UpdateFieldSetter<V>>>>>
             ModifyValue(UpdateFieldArray<V, Size, Bit, FirstElementBit>(T::* field), uint32 index)
         {
             _value._changesMask.Set(Bit);
@@ -270,7 +292,9 @@ namespace UF
         std::enable_if_t<std::is_base_of<HasChangesMaskTag, U>::value,
             std::conditional_t<std::is_base_of<IsUpdateFieldStructureTag, V>::value,
             MutableFieldReference<V, PublicSet>,
-            std::conditional_t<PublicSet, UpdateFieldPublicSetter<V>, UpdateFieldSetter<V>>>>
+            std::conditional_t<std::is_base_of<IsUpdateFieldHolderTag, V>::value,
+            MutableNestedFieldReference<V, PublicSet>,
+            std::conditional_t<PublicSet, UpdateFieldPublicSetter<V>, UpdateFieldSetter<V>>>>>
             ModifyValue(DynamicUpdateField<V, BlockBit, Bit>(T::* field), uint32 index)
         {
             if (index >= (_value.*field).size())
@@ -299,8 +323,10 @@ namespace UF
         std::enable_if_t<std::is_base_of<HasChangesMaskTag, U>::value,
             std::conditional_t<std::is_base_of<IsUpdateFieldStructureTag, V>::value,
             MutableFieldReference<V, PublicSet>,
-            std::conditional_t<PublicSet, UpdateFieldPublicSetter<V>, UpdateFieldSetter<V>>>>
-            ModifyValue(OptionalUpdateField<V, BlockBit, Bit>(T::* field), uint32)
+            std::conditional_t<std::is_base_of<IsUpdateFieldHolderTag, V>::value,
+            MutableNestedFieldReference<V, PublicSet>,
+            std::conditional_t<PublicSet, UpdateFieldPublicSetter<V>, UpdateFieldSetter<V>>>>>
+            ModifyValue(OptionalUpdateField<V, BlockBit, Bit>(T::* field), uint32 /*dummy*/)
         {
             if (!(_value.*field).is_initialized())
                 (_value.*field).ConstructValue();
@@ -330,6 +356,92 @@ namespace UF
         T& _value;
     };
 
+    template<typename T, bool PublicSet>
+    struct MutableNestedFieldReference
+    {
+        using ValueType = typename T::ValueType;
+
+        MutableNestedFieldReference(T& value) : _value(value)
+        {
+        }
+
+        template<typename U = T>
+        std::enable_if_t<std::is_base_of<UpdateFieldBase<ValueType>, U>::value,
+            std::conditional_t<std::is_base_of<IsUpdateFieldStructureTag, ValueType>::value,
+            MutableFieldReference<ValueType, PublicSet>,
+            std::conditional_t<std::is_base_of<IsUpdateFieldHolderTag, ValueType>::value,
+            MutableNestedFieldReference<ValueType, PublicSet>,
+            std::conditional_t<PublicSet, UpdateFieldPublicSetter<ValueType>, UpdateFieldSetter<ValueType>>>>>
+            ModifyValue()
+        {
+            return { _value._value };
+        }
+
+        template<typename U = T>
+        std::enable_if_t<std::is_base_of<UpdateFieldArrayBaseWithoutSize<ValueType>, U>::value,
+            std::conditional_t<std::is_base_of<IsUpdateFieldStructureTag, ValueType>::value,
+            MutableFieldReference<ValueType, PublicSet>,
+            std::conditional_t<std::is_base_of<IsUpdateFieldHolderTag, ValueType>::value,
+            MutableNestedFieldReference<ValueType, PublicSet>,
+            std::conditional_t<PublicSet, UpdateFieldPublicSetter<ValueType>, UpdateFieldSetter<ValueType>>>>>
+            ModifyValue(uint32 index)
+        {
+            return { _value._values[index] };
+        }
+
+        template<typename U = T>
+        std::enable_if_t<std::is_base_of<DynamicUpdateFieldBase<ValueType>, U>::value, DynamicUpdateFieldSetter<ValueType>>
+            ModifyValue()
+        {
+            return { _value._values, _value._updateMask };
+        }
+
+        template<typename U = T>
+        std::enable_if_t<std::is_base_of<DynamicUpdateFieldBase<ValueType>, U>::value,
+            std::conditional_t<std::is_base_of<IsUpdateFieldStructureTag, ValueType>::value,
+            MutableFieldReference<ValueType, PublicSet>,
+            std::conditional_t<std::is_base_of<IsUpdateFieldHolderTag, ValueType>::value,
+            MutableNestedFieldReference<ValueType, PublicSet>,
+            std::conditional_t<PublicSet, UpdateFieldPublicSetter<ValueType>, UpdateFieldSetter<ValueType>>>>>
+            ModifyValue(uint32 index)
+        {
+            if (index >= _value.size())
+            {
+                // fill with zeros until reaching desired slot
+                _value._values.resize(index + 1);
+                _value._updateMask.resize((_value._values.size() + 31) / 32);
+            }
+
+            _value.MarkChanged(index);
+            return { _value._values[index] };
+        }
+
+        template<typename U = T>
+        std::enable_if_t<std::is_base_of<OptionalUpdateFieldBase<ValueType>, U>::value, OptionalUpdateFieldSetter<ValueType>>
+            ModifyValue()
+        {
+            return { _value };
+        }
+
+        template<typename U = T>
+        std::enable_if_t<std::is_base_of<OptionalUpdateFieldBase<ValueType>, U>::value,
+            std::conditional_t<std::is_base_of<IsUpdateFieldStructureTag, ValueType>::value,
+            MutableFieldReference<ValueType, PublicSet>,
+            std::conditional_t<std::is_base_of<IsUpdateFieldHolderTag, ValueType>::value,
+            MutableNestedFieldReference<ValueType, PublicSet>,
+            std::conditional_t<PublicSet, UpdateFieldPublicSetter<ValueType>, UpdateFieldSetter<ValueType>>>>>
+            ModifyValue(uint32 /*dummy*/)
+        {
+            if (!_value.is_initialized())
+                _value.ConstructValue();
+
+            return { *(_value._value) };
+        }
+
+    private:
+        T& _value;
+    };
+
     template<std::size_t Bits>
     class HasChangesMask : public HasChangesMaskTag
     {
@@ -570,12 +682,15 @@ namespace UF
         Object* _owner;
     };
 
-    template<typename T, uint32 BlockBit, uint32 Bit>
-    class UpdateField
+    template<typename T>
+    class UpdateFieldBase : public IsUpdateFieldHolderTag
     {
         template<typename F, bool PublicSet>
         friend struct MutableFieldReference;
 
+        template<typename F, bool PublicSet>
+        friend struct MutableNestedFieldReference;
+
         template<std::size_t Bits>
         friend class HasChangesMask;
 
@@ -601,12 +716,25 @@ namespace UF
         T _value = {};
     };
 
-    template<typename T, std::size_t Size, uint32 Bit, uint32 FirstElementBit>
-    class UpdateFieldArray
+    template<typename T, uint32 BlockBit, uint32 Bit>
+    class UpdateField : public UpdateFieldBase<T>
+    {
+    };
+
+    template<typename T>
+    class UpdateFieldArrayBaseWithoutSize : public IsUpdateFieldHolderTag
+    {
+    };
+
+    template<typename T, std::size_t Size>
+    class UpdateFieldArrayBase : public UpdateFieldArrayBaseWithoutSize<T>
     {
         template<typename F, bool PublicSet>
         friend struct MutableFieldReference;
 
+        template<typename F, bool PublicSet>
+        friend struct MutableNestedFieldReference;
+
         template<std::size_t Bits>
         friend class HasChangesMask;
 
@@ -637,15 +765,23 @@ namespace UF
         T _values[Size] = {};
     };
 
+    template<typename T, std::size_t Size, uint32 Bit, uint32 FirstElementBit>
+    class UpdateFieldArray : public UpdateFieldArrayBase<T, Size>
+    {
+    };
+
     void WriteDynamicFieldUpdateMask(std::size_t size, std::vector<uint32> const& updateMask, ByteBuffer& data);
     void WriteCompleteDynamicFieldUpdateMask(std::size_t size, ByteBuffer& data);
 
-    template<typename T, uint32 BlockBit, uint32 Bit>
-    class DynamicUpdateField
+    template<typename T>
+    class DynamicUpdateFieldBase : public IsUpdateFieldHolderTag
     {
         template<typename F, bool PublicSet>
         friend struct MutableFieldReference;
 
+        template<typename F, bool PublicSet>
+        friend struct MutableNestedFieldReference;
+
         template<std::size_t Bits>
         friend class HasChangesMask;
 
@@ -734,12 +870,20 @@ namespace UF
         std::vector<uint32> _updateMask;
     };
 
+    template<typename T, uint32 BlockBit, uint32 Bit>
+    class DynamicUpdateField : public DynamicUpdateFieldBase<T>
+    {
+    };
+
     template<typename T>
-    class OptionalUpdateFieldBase
+    class OptionalUpdateFieldBase : public IsUpdateFieldHolderTag
     {
         template<typename F, bool PublicSet>
         friend struct MutableFieldReference;
 
+        template<typename F, bool PublicSet>
+        friend struct MutableNestedFieldReference;
+
         template<std::size_t Bits>
         friend class HasChangesMask;
 
diff --git a/src/server/game/Entities/Object/Updates/UpdateFields.h b/src/server/game/Entities/Object/Updates/UpdateFields.h
index a1fb875fcc6..f2faeffd2c5 100644
--- a/src/server/game/Entities/Object/Updates/UpdateFields.h
+++ b/src/server/game/Entities/Object/Updates/UpdateFields.h
@@ -537,7 +537,7 @@ struct ActivePlayerData : public IsUpdateFieldStructureTag, public HasChangesMas
     UpdateField<bool, 0, 2> BankAutoSortDisabled;
     UpdateField<bool, 0, 3> SortBagsRightToLeft;
     UpdateField<bool, 0, 4> InsertItemsLeftToRight;
-    UpdateFieldArray<DynamicUpdateField<UF::Research, 4294967295, 4294967295>, 1, 22, 23> Research;
+    UpdateFieldArray<DynamicUpdateFieldBase<UF::Research>, 1, 22, 23> Research;
     DynamicUpdateField<uint64, 0, 5> KnownTitles;
     DynamicUpdateField<uint16, 0, 6> ResearchSites;
     DynamicUpdateField<uint32, 0, 7> ResearchSiteProgress;
-- 
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