Add hunger

src/healing_system.rs

@@ -0,0 +1,22 @@
+use specs::prelude::*;
+
+use crate::{CombatStats, GameLog, Heals};
+
+pub struct HealingSystem {}
+
+impl<'a> System<'a> for HealingSystem {
+    type SystemData = (
+        WriteStorage<'a, Heals>,
+        WriteStorage<'a, CombatStats>,
+    );
+
+    fn run(&mut self, data: Self::SystemData) {
+        let (mut heals, mut stats) = data;
+
+        for (heal, mut stats) in (&heals, &mut stats).join() {
+            stats.hp = i32::min(stats.max_hp, stats.hp + heal.amount.iter().sum::<i32>());
+        }
+
+        heals.clear();
+    }
+}