add user properties methods support items

src/content/loading/BlockLoader.cpp

@@ -1,5 +1,6 @@
 #define VC_ENABLE_REFLECTION
 #include "ContentUnitLoader.hpp"
+#include "ContentLoadingCommons.hpp"
 
 #include "../ContentBuilder.hpp"
 #include "coders/json.hpp"
@@ -87,20 +88,7 @@ template<> void ContentUnitLoader<Block>::loadUnit(
     Block& def, const std::string& name, const io::path& file
 ) {
     auto root = io::read_json(file);
-    if (def.properties == nullptr) {
+    process_properties(def, name, root);
-        def.properties = dv::object();
-        def.properties["name"] = name;
-    }
-    for (auto& [key, value] : root.asObject()) {
-        auto pos = key.rfind('@');
-        if (pos == std::string::npos) {
-            def.properties[key] = value;
-            continue;
-        }
-        auto field = key.substr(0, pos);
-        auto suffix = key.substr(pos + 1);
-        process_method(def.properties, suffix, field, value);
-    }
 
     if (root.has("parent")) {
         const auto& parentName = root["parent"].asString();

src/content/loading/ContentLoadingCommons.hpp

@@ -0,0 +1,23 @@
+#pragma once
+
+#include "data/dv.hpp"
+
+#include <string>
+
+template <typename T>
+inline void process_properties(T& def, const std::string& name, const dv::value& root) {
+    if (def.properties == nullptr) {
+        def.properties = dv::object();
+        def.properties["name"] = name;
+    }
+    for (auto& [key, value] : root.asObject()) {
+        auto pos = key.rfind('@');
+        if (pos == std::string::npos) {
+            def.properties[key] = value;
+            continue;
+        }
+        auto field = key.substr(0, pos);
+        auto suffix = key.substr(pos + 1);
+        process_method(def.properties, suffix, field, value);
+    }
+}

src/content/loading/ItemLoader.cpp

@@ -1,5 +1,6 @@
 #define VC_ENABLE_REFLECTION
 #include "ContentUnitLoader.hpp"
+#include "ContentLoadingCommons.hpp"
 
 #include "../ContentBuilder.hpp"
 #include "coders/json.hpp"
@@ -12,11 +13,12 @@
 
 static debug::Logger logger("item-content-loader");
 
+
 template<> void ContentUnitLoader<ItemDef>::loadUnit(
     ItemDef& def, const std::string& name, const io::path& file
 ) {
     auto root = io::read_json(file);
-    def.properties = root;
+    process_properties(def, name, root);
 
     if (root.has("parent")) {
         const auto& parentName = root["parent"].asString();