inventory regions, minor refactor

src/items/Inventory.cpp

@@ -2,7 +2,7 @@
 
 #include "../content/ContentLUT.h"
 
-Inventory::Inventory(size_t size) : slots(size) {
+Inventory::Inventory(uint id, size_t size) : id(id), slots(size) {
 }
 
 ItemStack& Inventory::getSlot(size_t index) {
@@ -45,6 +45,7 @@ void Inventory::move(
 }
 
 void Inventory::deserialize(dynamic::Map* src) {
+    id = src->getNum("id", 1);
     auto slotsarr = src->list("slots");
     size_t slotscount = std::min(slotsarr->size(), slots.size());
     for (size_t i = 0; i < slotscount; i++) {
@@ -58,6 +59,8 @@ void Inventory::deserialize(dynamic::Map* src) {
 
 std::unique_ptr<dynamic::Map> Inventory::serialize() const {
     auto map = std::make_unique<dynamic::Map>();
+    map->put("id", id);
+
     auto& slotsarr = map->putList("slots");
     for (size_t i = 0; i < slots.size(); i++) {
         auto& item = slots[i];