move message dispatching into ecs-systems.lua

1 files changed, 14 insertions, 1 deletions

diff --git a/honey/ecs.lua b/honey/ecs.lua
index 69feb12..39f1c77 100644
--- a/honey/ecs.lua
+++ b/honey/ecs.lua
@@ -69,9 +69,22 @@ function EntityDb.addComponent(self, id, name, value)
 end
 
 
+-- add multiple components at once, for convenience
+function EntityDb.addComponents(self, id, components)
+	for name, value in pairs(components) do
+		self:addComponent(id, name, value)
+	end
+end
+
+
 -- get all entities with a given component
 function EntityDb.queryComponent(self, name)
-	return self.components[name].data
+	local component = self.components[name]
+	if component then 
+		return component.data
+	else
+		return {}
+	end
 end