1 files changed, 42 insertions, 0 deletions
diff --git a/src/systems/building.rs b/src/systems/building.rs
new file mode 100644
index 0000000..876554e
--- /dev/null
+++ b/src/systems/building.rs
@@ -0,0 +1,42 @@
+
+use specs::{
+	ReadStorage,
+	System,
+	Join,
+	Write
+};
+
+use crate::{
+	components::{
+		Position,
+		Build,
+		Trigger,
+		TriggerBox
+	},
+	resources::{NewEntities}
+};
+
+
+pub struct Building;
+impl <'a> System<'a> for Building{
+	type SystemData = (
+		ReadStorage<'a, Position>,
+		Write<'a, NewEntities>,
+		ReadStorage<'a, TriggerBox>,
+		ReadStorage<'a, Build>
+	);
+	
+	fn run(&mut self, (positions, mut new, triggerboxes, builds): Self::SystemData) {
+		for (position, triggerbox, build) in (&positions, &triggerboxes, &builds).join(){
+			for message in triggerbox.messages.iter() {
+				match message {
+					Trigger::Build | Trigger::Change => {
+						// todo: better error handling
+						new.create(position.pos, &build.obj).unwrap();
+					}
+					_ => {}
+				}
+			}
+		}
+	}
+}