extract the state to save

1 files changed, 43 insertions, 0 deletions

diff --git a/src/systems/save.rs b/src/systems/save.rs
new file mode 100644
index 0000000..924533a
--- /dev/null
+++ b/src/systems/save.rs
@@ -0,0 +1,43 @@
+
+use std::collections::HashMap;
+
+use specs::{
+	Entities,
+	ReadStorage,
+	System,
+	Join,
+	Read
+};
+
+use crate::pos::Pos;
+
+use crate::components::{
+	Position,
+	Serialise
+};
+
+use crate::savestate::SaveState;
+
+const INTERVAL: i32 = 20;
+
+pub struct Save(pub i32);
+impl <'a> System<'a> for Save {
+	type SystemData = (
+		Entities<'a>,
+		ReadStorage<'a, Position>,
+		ReadStorage<'a, Serialise>,
+	);
+	
+	fn run(&mut self, (entities, positions, serialisers): Self::SystemData) {
+		self.0 -= 1;
+		if self.0 > 0 {
+			return
+		}
+		self.0 = INTERVAL;
+		let mut state = SaveState::new();
+		for (pos, serialiser) in (&positions, &serialisers).join() {
+			state.changes.entry(pos.pos).or_insert(Vec::new()).push(serialiser.template.clone());
+		}
+		println!("save {}", state.to_json().to_string());
+	}
+}