3 files changed, 46 insertions, 2 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();
+					}
+					_ => {}
+				}
+			}
+		}
+	}
+}
diff --git a/src/systems/die.rs b/src/systems/die.rs
index c6fd646..021448e 100644
--- a/src/systems/die.rs
+++ b/src/systems/die.rs
@@ -29,7 +29,7 @@ impl <'a> System<'a> for Die {
 		for (entity, triggerbox) in (&entities, &triggerboxes).join() {
 			for trigger in triggerbox.messages.iter() {
 				match trigger {
-					Trigger::Die | Trigger::Remove => {
+					Trigger::Die | Trigger::Remove | Trigger::Change => {
 						if let Some(player) = players.get(entity) {
 							// players move to purgatory when dead
 							emigration.emigrants.push((player.id.clone(), purgatory::purgatory_id(), RoomPos::Unknown));
diff --git a/src/systems/mod.rs b/src/systems/mod.rs
index 3f990a7..72a6845 100644
--- a/src/systems/mod.rs
+++ b/src/systems/mod.rs
@@ -21,6 +21,7 @@ mod interact;
 mod droploot;
 mod growth;
 mod clear;
+mod building;
 
 pub use self::{
 	controlinput::ControlInput,
@@ -44,5 +45,6 @@ pub use self::{
 	interact::Interact,
 	droploot::DropLoot,
 	growth::Growth,
-	clear::Clear
+	clear::Clear,
+	building::Building
 };