Inventory updates, API updates, lots of file renaming

src/state/play/area_manager.cpp

@@ -0,0 +1,26 @@
+#include "area_manager.hpp"
+
+#include <imgui.h>
+
+using namespace game::resource;
+using namespace game::util;
+
+namespace game::state::play
+{
+  int AreaManager::get(entity::Character& character)
+  {
+    auto& data = character.data;
+    auto& schema = data.areaSchema;
+    if (schema.areas.empty()) return -1;
+
+    auto size = (int)data.stages.size();
+
+    for (int i = 0; i < size; i++)
+    {
+      auto& stage = data.stages[size - i - 1];
+      if (stage.areaID != -1) return stage.areaID;
+    }
+
+    return -1;
+  }
+}