Add resources system (#111)

closes: #71
Reviewed-on: #111
Reviewed-by: Raphaël <r.lauray@outlook.fr>
Co-authored-by: CoCo_Sol007 <solois.corentin@gmail.com>
Co-committed-by: CoCo_Sol007 <solois.corentin@gmail.com>

crates/border-wars/src/lib.rs

@@ -8,6 +8,7 @@ use serde::{Deserialize, Serialize};
 pub mod camera;
 pub mod map;
 pub mod networking;
+pub mod resources;
 pub mod scenes;
 pub mod ui;
 

crates/border-wars/src/main.rs

@@ -7,6 +7,7 @@ use border_wars::map::ownership::OwnershipPlugin;
 use border_wars::map::renderer::RendererPlugin;
 use border_wars::map::selected_tile::SelectTilePlugin;
 use border_wars::networking::NetworkingPlugin;
+use border_wars::resources::ResourcesPlugin;
 use border_wars::scenes::ScenesPlugin;
 use border_wars::ui::UiPlugin;
 
@@ -21,5 +22,6 @@ fn main() {
         .add_plugins(MapGenerationPlugin)
         .add_plugins(UiPlugin)
         .add_plugins(OwnershipPlugin)
+        .add_plugins(ResourcesPlugin)
         .run();
 }

crates/border-wars/src/resources.rs

@@ -0,0 +1,52 @@
+//! All program related to the resources of the game.
+
+use bevy::prelude::*;
+
+/// The plugin that manage the resources.
+pub struct ResourcesPlugin;
+
+impl Plugin for ResourcesPlugin {
+    fn build(&self, app: &mut App) {
+        app.add_event::<ResetResources>()
+            .insert_resource(Resources::initial())
+            .add_systems(Update, handle_reset_resources);
+    }
+}
+
+/// The resources of the game.
+#[derive(Resource, Default)]
+pub struct Resources {
+    /// The stone resource.
+    pub stone: u32,
+
+    /// The wood resource.
+    pub wood: u32,
+
+    /// The food resource.
+    pub food: u32,
+}
+
+impl Resources {
+    /// Returns the initial resources of the game.
+    const fn initial() -> Self {
+        Self {
+            stone: 100,
+            wood: 100,
+            food: 100,
+        }
+    }
+}
+
+/// An event send to reset the resources of the game.
+#[derive(Event)]
+pub struct ResetResources;
+
+/// Handles the reset resources event.
+fn handle_reset_resources(
+    mut reset_resources_event: EventReader<ResetResources>,
+    mut resources: ResMut<Resources>,
+) {
+    for _ in reset_resources_event.read() {
+        *resources = Resources::initial();
+    }
+}