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

crates/shared/src/abilities/healing.rs

@@ -0,0 +1,75 @@
+use crate::{
+    GameState, global_observer, heads::ActiveHeads, heads_database::HeadsDatabase,
+    hitpoints::Hitpoints, loading_assets::AudioAssets,
+};
+use bevy::prelude::*;
+
+#[derive(Component)]
+pub struct Healing(pub Entity);
+
+#[derive(Event, Debug)]
+pub enum HealingStateChanged {
+    Started,
+    Stopped,
+}
+
+pub fn plugin(app: &mut App) {
+    app.add_systems(Update, update.run_if(in_state(GameState::Playing)));
+
+    global_observer!(app, on_heal_start_stop);
+}
+
+fn on_heal_start_stop(
+    trigger: Trigger<HealingStateChanged>,
+    mut cmds: Commands,
+    assets: Res<AudioAssets>,
+    query: Query<&Healing>,
+) {
+    if matches!(trigger.event(), HealingStateChanged::Started) {
+        let e = cmds
+            .spawn((
+                Name::new("sfx-heal"),
+                AudioPlayer::new(assets.healing.clone()),
+                PlaybackSettings {
+                    mode: bevy::audio::PlaybackMode::Loop,
+                    ..Default::default()
+                },
+            ))
+            .id();
+        cmds.entity(trigger.target())
+            .add_child(e)
+            .insert(Healing(e));
+    } else {
+        if let Ok(healing) = query.single() {
+            cmds.entity(healing.0).despawn();
+        }
+        cmds.entity(trigger.target()).remove::<Healing>();
+    }
+}
+
+fn update(
+    mut query: Query<(&mut ActiveHeads, &mut Hitpoints), With<Healing>>,
+    time: Res<Time>,
+    heads_db: Res<HeadsDatabase>,
+) {
+    for (mut heads, mut hitpoints) in query.iter_mut() {
+        let Some(current) = heads.current() else {
+            continue;
+        };
+
+        let head = heads_db.head_stats(current.head);
+
+        if current.last_use + (1. / head.aps) > time.elapsed_secs() {
+            continue;
+        }
+
+        let medic_hp = hitpoints.get().0;
+        if medic_hp > 0 {
+            if let Some(health) = heads.medic_heal(2, time.elapsed_secs()) {
+                hitpoints.set_health(health);
+            } else {
+                continue;
+            }
+        }
+    }
+}