add ecs.Accessor helper and node _child hierarchy

1 files changed, 25 insertions, 0 deletions

diff --git a/honey/ecs/ecs.lua b/honey/ecs/ecs.lua
index b0409e4..301ed36 100644
--- a/honey/ecs/ecs.lua
+++ b/honey/ecs/ecs.lua
@@ -271,4 +271,29 @@ function SystemDb.removeSystem(self, id)
 end
 
 
+--===== Access helper =====--
+
+
+function Accessor(db, id)
+	local tbl = {
+		__db = db,
+		__id = id,
+	}
+
+	setmetatable(tbl, {
+		__index=function(self, key)
+			return self.__db:getComponent(self.__id, key)
+		end,
+		__newindex=function(self, key, value)
+			self.__db:addComponent(self.__id, key, value)
+		end,
+		__tostring=function(self)
+			return string.format("Accessor<%s>", self.__id)
+		end,
+	})
+
+	return tbl
+end
+
+
 return module