From 1e31e95ca16eaa21b7bebee6c46a963c6e92e1bd Mon Sep 17 00:00:00 2001
From: sinYa Iwasaki <iwasaki@sinproject.net>
Date: Sat, 9 Mar 2024 17:38:41 +0900
Subject: [PATCH] Add a first event #56

---
 src/events.rs | 40 ++++++++++++++++++++++++++++++++++++++++
 src/lib.rs    |  1 +
 src/my_app.rs | 10 +++++++---
 src/sprite.rs |  4 ++--
 4 files changed, 50 insertions(+), 5 deletions(-)
 create mode 100644 src/events.rs

diff --git a/src/events.rs b/src/events.rs
new file mode 100644
index 0000000..dd62add
--- /dev/null
+++ b/src/events.rs
@@ -0,0 +1,40 @@
+use bevy::prelude::*;
+
+use crate::{block_pattern::BlockPatterns, sprite};
+
+#[derive(Resource)]
+pub struct EventTriggerState {
+    event_timer: Timer,
+}
+
+impl Default for EventTriggerState {
+    fn default() -> Self {
+        Self {
+            event_timer: Timer::from_seconds(1.0, TimerMode::Repeating),
+        }
+    }
+}
+
+#[derive(Event, Default)]
+pub struct NewBlockEvent;
+
+pub fn event_trigger(
+    time: Res<Time>,
+    mut state: ResMut<EventTriggerState>,
+    mut new_block_events: EventWriter<NewBlockEvent>,
+) {
+    if state.event_timer.tick(time.delta()).finished() {
+        new_block_events.send_default();
+    }
+}
+
+pub fn event_listener(
+    mut commands: Commands,
+    mut new_block_events: EventReader<NewBlockEvent>,
+    mut block_patterns: Res<BlockPatterns>,
+) {
+    for _ in new_block_events.read() {
+        println!("New block event received!");
+        sprite::spawn_block(&mut commands, &mut block_patterns)
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index c665e4c..fb99c21 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -5,6 +5,7 @@ mod camera;
 mod color_resources;
 mod config;
 mod constants;
+mod events;
 mod input;
 pub mod my_app;
 mod position;
diff --git a/src/my_app.rs b/src/my_app.rs
index a656c35..978d7cd 100644
--- a/src/my_app.rs
+++ b/src/my_app.rs
@@ -2,6 +2,7 @@ use bevy::prelude::*;
 
 use crate::block_pattern;
 use crate::camera;
+use crate::events;
 use crate::input;
 use crate::sprite;
 use crate::text;
@@ -21,15 +22,18 @@ pub fn setup(app: &mut App) {
     let block_patterns = block_pattern::BlockPatterns::new();
 
     app.insert_resource(block_patterns)
+        .add_event::<events::NewBlockEvent>()
+        .init_resource::<events::EventTriggerState>()
         .add_systems(Startup, camera::spawn_camera)
         .add_systems(Startup, text::spawn_initial_text)
         // .insert_resource(color_resources)
         // .add_systems(Startup, setup::setup)
+        .add_systems(Update, (events::event_trigger, events::event_listener))
         .add_systems(Update, input::keyboard_input_system)
         .add_systems(Update, input::check_esc_to_exit)
-        .add_systems(Update, sprite::position_transform)
-        // .add_systems(Update, sprite::change_color)
-        .add_systems(Update, sprite::spawn_block);
+        .add_systems(Update, sprite::position_transform);
+    // .add_systems(Update, sprite::change_color)
+    // .add_systems(Update, sprite::spawn_block);
 }
 
 #[cfg_attr(coverage_nightly, coverage(off))]
diff --git a/src/sprite.rs b/src/sprite.rs
index 5966a50..4f997ec 100644
--- a/src/sprite.rs
+++ b/src/sprite.rs
@@ -33,7 +33,7 @@ fn spawn_block_element(commands: &mut Commands, position: Position, color: Color
 }
 
 #[cfg_attr(coverage_nightly, coverage(off))]
-pub fn spawn_block(mut commands: Commands, block_patterns: Res<BlockPatterns>) {
+pub fn spawn_block(commands: &mut Commands, block_patterns: &mut Res<BlockPatterns>) {
     let block = block_patterns.random().unwrap();
 
     let initial_x = (constants::UNIT_LENGTH.0 / 2) as i32;
@@ -42,7 +42,7 @@ pub fn spawn_block(mut commands: Commands, block_patterns: Res<BlockPatterns>) {
     block.positions.iter().for_each(|(x, y)| {
         let position = Position::new(x + initial_x, y + initial_y);
 
-        spawn_block_element(&mut commands, position, block.color);
+        spawn_block_element(commands, position, block.color);
     });
 }