Split crate into shared logic library and binary crate (#52)

crates/shared/src/cash_heal.rs

@@ -0,0 +1,81 @@
+use crate::{
+    abilities::TriggerCashHeal, cash::CashResource, global_observer, hitpoints::Hitpoints,
+    player::Player, sounds::PlaySound,
+};
+use bevy::prelude::*;
+
+pub fn plugin(app: &mut App) {
+    global_observer!(app, on_heal_trigger);
+}
+
+#[derive(Debug, PartialEq, Eq)]
+struct HealAction {
+    cost: i32,
+    damage_healed: u32,
+}
+
+fn on_heal_trigger(
+    _trigger: Trigger<TriggerCashHeal>,
+    mut cmds: Commands,
+    mut cash: ResMut<CashResource>,
+    mut query: Query<&mut Hitpoints, With<Player>>,
+) {
+    let Ok(mut hp) = query.single_mut() else {
+        return;
+    };
+
+    if hp.max() || cash.cash == 0 {
+        return;
+    }
+
+    let action = heal(cash.cash, hp.get().1 - hp.get().0);
+
+    hp.heal(action.damage_healed);
+
+    cash.cash = cash.cash.saturating_sub(action.cost);
+
+    //TODO: trigger ui cost animation
+    cmds.trigger(PlaySound::CashHeal);
+}
+
+fn heal(cash: i32, damage: u32) -> HealAction {
+    let cost = (damage as f32 / 10. * 25.) as i32;
+
+    if cash >= cost {
+        HealAction {
+            cost,
+            damage_healed: damage,
+        }
+    } else {
+        let damage_healed = (cash as f32 * 10. / 25.) as u32;
+
+        HealAction {
+            cost: cash,
+            damage_healed,
+        }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn test_heal() {
+        assert_eq!(
+            heal(100, 10),
+            HealAction {
+                cost: 25,
+                damage_healed: 10
+            }
+        );
+
+        assert_eq!(
+            heal(100, 90),
+            HealAction {
+                cost: 100,
+                damage_healed: 40
+            }
+        );
+    }
+}