1 files changed, 50 insertions, 0 deletions
diff --git a/src/systems/spawn.rs b/src/systems/spawn.rs
new file mode 100644
index 0000000..6bb4912
--- /dev/null
+++ b/src/systems/spawn.rs
@@ -0,0 +1,50 @@
+
+use std::collections::HashMap;
+
+use specs::{
+	WriteStorage,
+	ReadStorage,
+	Write,
+	Read,
+	System,
+	Join
+};
+
+use crate::{
+	components::{
+		Position,
+		Spawner,
+		Clan
+	},
+	resources::{NewEntities, TimeStamp},
+	componentwrapper::ComponentWrapper
+};
+
+
+
+pub struct Spawn;
+impl <'a> System<'a> for Spawn {
+	type SystemData = (
+		ReadStorage<'a, Position>,
+		Write<'a, NewEntities>,
+		WriteStorage<'a, Spawner>,
+		ReadStorage<'a, Clan>,
+		Read<'a, TimeStamp>
+	);
+	
+	fn run(&mut self, (positions, mut new, mut spawners, clans, time): Self::SystemData) {
+		let mut clan_nums: HashMap<&Clan, usize> = HashMap::new();
+		for clan in (&clans).join() {
+			let n: usize = *clan_nums.entry(clan).or_insert(0);
+			clan_nums.insert(clan, n+1);
+		}
+		for (spawner, position) in (&mut spawners, &positions).join() {
+			if time.time > spawner.last_spawn + spawner.delay && *clan_nums.get(&spawner.clan).unwrap_or(&0) < spawner.amount {
+				spawner.last_spawn = time.time;
+				let mut preent = new.encyclopedia.construct(&spawner.template).expect("unable to spawn entity from spawner");
+				preent.push(ComponentWrapper::Clan(spawner.clan.clone()));
+				new.to_build.push((position.pos, preent));
+			}
+		}
+	}
+}