up3

server/block/container.go

@@ -0,0 +1,30 @@
+package block
+
+import (
+	"github.com/df-mc/dragonfly/server/block/cube"
+	"github.com/df-mc/dragonfly/server/item"
+	"github.com/df-mc/dragonfly/server/item/inventory"
+	"github.com/df-mc/dragonfly/server/world"
+)
+
+// ContainerViewer represents a viewer that is able to view a container and its inventory.
+type ContainerViewer interface {
+	world.Viewer
+	// ViewSlotChange views a change of a single slot in the inventory, in which the item was changed to the
+	// new item passed.
+	ViewSlotChange(slot int, newItem item.Stack)
+}
+
+// ContainerOpener represents an entity that is able to open a container.
+type ContainerOpener interface {
+	// OpenBlockContainer opens a block container at the position passed.
+	OpenBlockContainer(pos cube.Pos, tx *world.Tx)
+}
+
+// Container represents a container of items, typically a block such as a chest. Containers may have their
+// inventory opened by viewers.
+type Container interface {
+	AddViewer(v ContainerViewer, tx *world.Tx, pos cube.Pos)
+	RemoveViewer(v ContainerViewer, tx *world.Tx, pos cube.Pos)
+	Inventory(tx *world.Tx, pos cube.Pos) *inventory.Inventory
+}