Move object into atlas

pkg/atlas/objects.go

@@ -0,0 +1,53 @@
+package atlas
+
+// Type represents an object type
+type Type byte
+
+// Types of objects
+const (
+	// ObjectNone represents no object at all
+	ObjectNone = Type(0)
+
+	// ObjectRover represents a live rover
+	ObjectRover = Type('R')
+
+	// ObjectSmallRock is a small stashable rock
+	ObjectSmallRock = Type('o')
+
+	// ObjectLargeRock is a large blocking rock
+	ObjectLargeRock = Type('O')
+)
+
+// Object represents an object in the world
+type Object struct {
+	Type Type `json:"type"`
+}
+
+// IsBlocking checks if an object is a blocking object
+func (o *Object) IsBlocking() bool {
+	var blocking = [...]Type{
+		ObjectRover,
+		ObjectLargeRock,
+	}
+
+	for _, t := range blocking {
+		if o.Type == t {
+			return true
+		}
+	}
+	return false
+}
+
+// IsStashable checks if an object is stashable
+func (o *Object) IsStashable() bool {
+	var stashable = [...]Type{
+		ObjectSmallRock,
+	}
+
+	for _, t := range stashable {
+		if o.Type == t {
+			return true
+		}
+	}
+	return false
+}