inventory trait

libswan/include/swan/traits/BodyTrait.h

@@ -12,6 +12,7 @@ namespace BodyTrait {
 class Body;
 class HasBody {
 public:
+	virtual ~HasBody() = default;
 	virtual Body &getBody() = 0;
 };
 
@@ -27,6 +28,8 @@ struct Bounds {
 
 class Body {
 public:
+	virtual ~Body() = default;
+
 	virtual Bounds getBounds() = 0;
 	virtual void move(Vec2 rel) = 0;
 	virtual void moveTo(Vec2 pos) = 0;

libswan/include/swan/traits/InventoryTrait.h

@@ -1,21 +1,51 @@
 #pragma once
 
+#include <vector>
+
 #include "../Vector2.h"
+#include "../ItemStack.h"
 
 namespace Swan {
 
-class ItemStack;
-
 namespace InventoryTrait {
 
 class Inventory;
 class HasInventory {
 public:
+	virtual ~HasInventory() = default;
 	virtual Inventory &getInventory() = 0;
 };
 
 class Inventory {
 public:
+	virtual ~Inventory() = default;
+
+	virtual int size() = 0;
+	virtual ItemStack &get(int slot) = 0;
+	virtual ItemStack insert(ItemStack stack, int slot = 0) = 0;
+};
+
+class BasicInventory: public Inventory {
+public:
+	BasicInventory(int size): size_(size) {}
+
+	int size() override { return size_; }
+
+	ItemStack &get(int slot) {
+		if (slot < size_)
+			return content_[slot];
+		return ItemStack();
+	}
+
+	ItemStack insert(ItemStack stack) {
+		for (int i = 0; !stack.empty() && i < size_; ++i)
+			stack = content_[i].insert(stack);
+		return stack;
+	}
+
+private:
+	int size_;
+	std::vector<ItemStack> content_(size_);
 };
 
 }