restore after broken git

src/common/systems.rs

@@ -0,0 +1,38 @@
+use bevy::prelude::*;
+
+use crate::common::{CommonCloseApp, ExitToMainMenu};
+use crate::common::messages::ExitRequestMessage;
+use crate::states::AppState;
+use crate::ui::button_click::ButtonClickMessage;
+
+pub fn exit_to_main_menu_system(
+    interaction_query: Query<
+        &Interaction,
+        (Changed<Interaction>, With<Button>, With<ExitToMainMenu>),
+    >,
+    mut next_state: ResMut<NextState<AppState>>,
+) {
+    for interaction in &interaction_query {
+        if matches!(interaction, Interaction::Pressed) {
+            next_state.set(AppState::MainMenu);
+        }
+    }
+}
+
+pub fn close_app_system(
+    mut messages: MessageReader<ButtonClickMessage<CommonCloseApp>>,
+    mut exit_request: MessageWriter<ExitRequestMessage>,
+) {
+    for _msg in messages.read() {
+        exit_request.write(ExitRequestMessage);
+    }
+}
+
+pub fn exit_system(
+    mut requests: MessageReader<ExitRequestMessage>,
+    mut app_exit: MessageWriter<AppExit>,
+) {
+    for _ in requests.read() {
+        app_exit.write(AppExit::Success);
+    }
+}