beet_net 0.0.8

Cross-platform networking utilities
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use crate::prelude::*;
use beet_core::prelude::*;
#[cfg(feature = "flow")]
use beet_flow::prelude::ControlFlowPlugin;

/// Represents a http request, may contain a [`Request`] or [`Response`]
#[derive(Default, Reflect, Component)]
#[reflect(Component)]
pub struct Exchange;

/// Points to the [`HttpServer`] that this exchange was spawned by.
/// We don't use [`Children`] because some server patterns have a different
/// meaning for that, for example `beet_router` uses `beet_flow` to represent
/// the routes, and the [`Exchange`] is an `agent`.
#[derive(Deref, Reflect, Component)]
#[reflect(Component)]
#[relationship(relationship_target = Exchanges)]
#[require(Exchange)]
pub struct ExchangeOf(pub Entity);

/// List of [`Exchange`]
#[derive(Deref, Component)]
#[relationship_target(relationship = ExchangeOf, linked_spawn)]
pub struct Exchanges(Vec<Entity>);

/// Plugin for running bevy servers.
/// by default this plugin will spawn the default [`HttpServer`] on [`Startup`]
#[derive(Default)]
pub struct ServerPlugin;


impl ServerPlugin {
	/// Runs the app with a tokio runtime if the `lambda` feature is enabled.
	pub fn maybe_tokio_runner(mut app: App) -> AppExit {
		#[cfg(all(feature = "lambda", not(target_arch = "wasm32")))]
		{
			tokio::runtime::Builder::new_multi_thread()
				.enable_all()
				.build()
				.unwrap()
				.block_on(app.run_async())
		}
		#[cfg(not(all(feature = "lambda", not(target_arch = "wasm32"))))]
		{
			// just use default runner
			use bevy::app::ScheduleRunnerPlugin;
			ScheduleRunnerPlugin::default().build(&mut app);
			app.run()
		}
	}
}

impl Plugin for ServerPlugin {
	fn build(&self, app: &mut App) {
		app.init_plugin::<AsyncPlugin>().add_observer(server_stats);
		#[cfg(feature = "flow")]
		app.init_plugin::<ControlFlowPlugin>();
	}
}


/// Update server stats if available
fn server_stats(
	ev: On<ExchangeComplete>,
	mut servers: Query<&mut ServerStatus>,
	exchange: Query<(&RequestMeta, &Response, &ExchangeOf)>,
) -> Result {
	let entity = ev.target();
	let Ok((meta, response, exchange_of)) = exchange.get(entity) else {
		return Ok(());
	};
	let status = response.status();
	let duration = meta.started().elapsed();
	let path = meta.path_string();
	let method = meta.method();

	let Ok(mut stats) = servers.get_mut(exchange_of.get()) else {
		return Ok(());
	};

	bevy::log::info!(
		"
Request Complete
  path:     {}
  method:   {}
  duration: {}
  status:   {}
  index:    {}
",
		path,
		method,
		time_ext::pretty_print_duration(duration),
		status,
		stats.request_count()
	);
	stats.increment_requests();
	Ok(())
}



#[derive(Default, Component)]
pub struct ServerStatus {
	request_count: u128,
}
impl ServerStatus {
	pub fn request_count(&self) -> u128 { self.request_count }
	pub(super) fn increment_requests(&mut self) -> &mut Self {
		self.request_count += 1;
		self
	}
}

#[cfg(test)]
#[cfg(all(feature = "server", not(target_arch = "wasm32")))]
mod test {
	use crate::prelude::*;
	use beet_core::prelude::*;

	#[beet_core::test]
	async fn http_server() {
		let server = HttpServer::new_test();
		let url = server.local_url();
		let _handle = std::thread::spawn(|| {
			App::new()
				.add_plugins((MinimalPlugins, ServerPlugin))
				.spawn_then((
					server,
					ExchangeSpawner::new_handler(|_, _| {
						Response::ok().with_body("hello")
					}),
				))
				.run();
		});
		time_ext::sleep_millis(50).await;
		for _ in 0..10 {
			Request::post(&url)
				.send()
				.await
				.unwrap()
				.into_result()
				.await
				.unwrap()
				.text()
				.await
				.unwrap()
				.xpect_eq("hello");
		}
	}
}