roguelike/src/healing_system.rs

use specs::prelude::*;

use crate::{CombatStats, 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();
    }
}