Beginning the conversion to an Effects system

src/effects/targeting.rs

@@ -0,0 +1,10 @@
+use crate::{Map, Position};
+use specs::prelude::*;
+
+pub fn entity_position(ecs: &World, target: Entity) -> Option<usize> {
+    if let Some(position) = ecs.read_storage::<Position>().get(target) {
+        let map = ecs.fetch::<Map>();
+        return Some(map.xy_idx(position.x, position.y));
+    }
+    return None;
+}