Add more modular saving of config data for items (#1591)

* stubbing for saving item extra data

* add declaration to header

* modularize loading for all possible extra data

* move logic to Item

* remove extra map

dGame/dInventory/Item.h

@@ -9,6 +9,10 @@
 #include "eInventoryType.h"
 #include "eLootSourceType.h"
 
+namespace tinyxml2 {
+	class XMLElement;
+};
+
 /**
  * An item that can be stored in an inventory and optionally consumed or equipped
  * TODO: ideally this should be a component
@@ -116,6 +120,12 @@ public:
 	 */
 	std::vector<LDFBaseData*>& GetConfig();
 
+	/**
+	 * Returns current config info for this item, e.g. for rockets
+	 * @return current config info for this item
+	 */
+	std::vector<LDFBaseData*> GetConfig() const;
+
 	/**
 	 * Returns the database info for this item
 	 * @return the database info for this item
@@ -214,6 +224,10 @@ public:
 	 */
 	void RemoveFromInventory();
 
+	void SaveConfigXml(tinyxml2::XMLElement& i) const;
+
+	void LoadConfigXml(const tinyxml2::XMLElement& i);
+
 private:
 	/**
 	 * The object ID of this item