feat: cosmic settings daemon (#8)

* feat: cosmic settings daemon

* refactor: simplify by unifying trait for state and config

* chore: add ping and pong methods

* refactor: remove ping & pong methods

* cleanup

Cargo.toml

@@ -3,6 +3,7 @@
 resolver = "2"
 
 members = [
+    "cosmic-settings-daemon",
     "mpris2",
     "networkmanager",
     "timedate",

cosmic-settings-daemon/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "cosmic-settings-daemon"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+zbus.workspace = true
+
+[dev-dependencies]
+futures = "0.3"
+tokio = { version = "1", features = ["full"] }
+zbus.workspace = true
+zbus.features = ["tokio"]

cosmic-settings-daemon/examples/simple.rs

@@ -0,0 +1,33 @@
+use futures::StreamExt;
+
+#[tokio::main]
+async fn main() -> zbus::Result<()> {
+	let connection = zbus::Connection::session().await?;
+
+	let proxy = cosmic_settings_daemon::CosmicSettingsDaemonProxy::new(&connection).await?;
+
+	println!("Display brightness: {}", proxy.display_brightness().await?);
+	println!(
+		"Keyboard brightness: {}",
+		proxy.keyboard_brightness().await?
+	);
+
+	let (config_path, name) = proxy
+		.watch_config("com.system76.CosmicTheme.Light", 1)
+		.await?;
+	dbg!(&config_path, &name);
+	let config_proxy = cosmic_settings_daemon::ConfigProxy::builder(&connection)
+		.path(config_path)?
+		.destination(name)?
+		.build()
+		.await?;
+	let mut stream = config_proxy.receive_changed().await?;
+
+	println!("Watching config for the libcosmic light theme...");
+	println!("Change the light theme in Settings > Appearance to trigger a signal.");
+	while let Some(c) = stream.next().await {
+		let c = c.args()?;
+		println!("Config changed: {} {}", c.id, c.key);
+	}
+	Ok(())
+}

cosmic-settings-daemon/src/lib.rs

@@ -0,0 +1,75 @@
+//! # DBus interface proxy for: `com.system76.CosmicSettingsDaemon`
+//!
+//! This code was generated by `zbus-xmlgen` `3.1.1` from DBus introspection data.
+//! Source: `Interface '/com/system76/CosmicSettingsDaemon' from service 'com.system76.CosmicSettingsDaemon' on session bus`.
+//!
+//! You may prefer to adapt it, instead of using it verbatim.
+//!
+//! More information can be found in the
+//! [Writing a client proxy](https://dbus.pages.freedesktop.org/zbus/client.html)
+//! section of the zbus documentation.
+//!
+//! This DBus object implements
+//! [standard DBus interfaces](https://dbus.freedesktop.org/doc/dbus-specification.html),
+//! (`org.freedesktop.DBus.*`) for which the following zbus proxies can be used:
+//!
+//! * [`zbus::fdo::PeerProxy`]
+//! * [`zbus::fdo::PropertiesProxy`]
+//! * [`zbus::fdo::IntrospectableProxy`]
+//!
+//! …consequently `zbus-xmlgen` did not generate code for the above interfaces.
+
+use zbus::{dbus_proxy, names::OwnedWellKnownName};
+
+#[dbus_proxy(
+	interface = "com.system76.CosmicSettingsDaemon",
+	default_service = "com.system76.CosmicSettingsDaemon",
+	default_path = "/com/system76/CosmicSettingsDaemon"
+)]
+trait CosmicSettingsDaemon {
+	/// DecreaseDisplayBrightness method
+	fn decrease_display_brightness(&self) -> zbus::Result<()>;
+
+	/// DecreaseKeyboardBrightness method
+	fn decrease_keyboard_brightness(&self) -> zbus::Result<()>;
+
+	/// IncreaseDisplayBrightness method
+	fn increase_display_brightness(&self) -> zbus::Result<()>;
+
+	/// IncreaseKeyboardBrightness method
+	fn increase_keyboard_brightness(&self) -> zbus::Result<()>;
+
+	/// WatchConfig method
+	fn watch_config(
+		&self,
+		id: &str,
+		version: u64,
+	) -> zbus::Result<(zbus::zvariant::OwnedObjectPath, OwnedWellKnownName)>;
+
+	/// WatchState method
+	fn watch_state(
+		&self,
+		id: &str,
+		version: u64,
+	) -> zbus::Result<(zbus::zvariant::OwnedObjectPath, OwnedWellKnownName)>;
+
+	/// DisplayBrightness property
+	#[dbus_proxy(property)]
+	fn display_brightness(&self) -> zbus::Result<i32>;
+	fn set_display_brightness(&self, value: i32) -> zbus::Result<()>;
+
+	/// KeyboardBrightness property
+	#[dbus_proxy(property)]
+	fn keyboard_brightness(&self) -> zbus::Result<i32>;
+	fn set_keyboard_brightness(&self, value: i32) -> zbus::Result<()>;
+}
+
+#[dbus_proxy(
+	interface = "com.system76.CosmicSettingsDaemon.Config",
+	default_service = "com.system76.CosmicSettingsDaemon.Config"
+)]
+trait Config {
+	/// Changed signal
+	#[dbus_proxy(signal)]
+	async fn changed(&self, id: String, key: String) -> zbus::Result<()>;
+}