lua: inventory library

src/items/Inventories.h

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+#ifndef ITEMS_INVENTORIES_H_
+#define ITEMS_INVENTORIES_H_
+
+#include <string>
+#include <memory>
+#include <unordered_map>
+
+#include "Inventory.h"
+#include "../maths/util.h"
+
+class Level;
+
+using inventories_map = std::unordered_map<int64_t, std::shared_ptr<Inventory>>;
+
+/* Inventories runtime storage */
+class Inventories {
+    Level& level;
+    inventories_map map;
+    PseudoRandom random;
+public:
+    Inventories(Level& level);
+    ~Inventories();
+
+    /* Create new inventory with new id */
+    std::shared_ptr<Inventory> create(size_t size);
+
+    /* Create runtime-only inventory (has negative id) */
+    std::shared_ptr<Inventory> createVirtual(size_t size);
+
+    /* Store inventory */
+    void store(std::shared_ptr<Inventory> inv);
+
+    /* Get inventory by id (works with both real and virtual)*/
+    std::shared_ptr<Inventory> get(int64_t id);
+
+    const inventories_map& getMap() const;
+};
+
+#endif // ITEMS_INVENTORIES_H_