feat: Add device interface and factory

wip

fix borrowing issue and make everything compile

wip

src/device/helios.rs

@@ -0,0 +1,62 @@
+///
+/// Configure udev:
+/// https://github.com/Grix/helios_dac/blob/master/docs/udev_rules_for_linux.md
+///
+use helios_dac::{NativeHeliosDac, NativeHeliosDacController};
+use helios_dac::{
+	// Coordinate,
+	Color,
+	DeviceStatus,
+	Frame,
+	Point as HeliosPoint,
+};
+use crate::conf::HeliosConf;
+use crate::device::{Device, Status};
+use crate::errors::{LJError, LJResult};
+use crate::point::Point;
+
+pub struct HeliosDevice {
+	pub conf: HeliosConf,
+	dac: NativeHeliosDac,
+}
+
+impl HeliosDevice {
+	pub fn new(conf: &HeliosConf) -> LJResult<Self> {
+		let id = conf.id;
+		let controller = NativeHeliosDacController::new()?;
+		let devices = controller.list_devices()?;
+		let Some(device) = devices.into_iter().nth(id as usize) else {
+			return Err(Box::new(LJError::HeliosDeviceMissing));
+		};
+		let dac = device.open()?;
+		Ok(Self {
+			conf: (*conf).clone(),			dac,
+		})
+	}
+}
+
+impl Device for HeliosDevice {
+	fn status(&self) -> Status {
+		return Status {
+			active: true,
+			last_traced_at: "now".to_string(),
+			properties: vec!["foo".to_string()],
+		};
+	}
+
+	fn draw(&self,
+	        line: Vec<Point>,
+	        speed: u32,
+	) -> LJResult<()> {
+		while let Ok(DeviceStatus::NotReady) = self.dac.status() {}
+
+		let points: Vec<helios_dac::Point> = line.into_iter().map(|p| p.into()).collect();
+		let frame = Frame::new(speed, points);
+		Ok(())
+	}
+
+	fn stop(&mut self) -> LJResult<()> {
+		self.dac.stop()?;
+		Ok(())
+	}
+}

src/device/mod.rs

@@ -0,0 +1,45 @@
+use crate::point::Point;
+
+mod helios;
+
+use crate::conf::{Conf, DacFamily, EtherDreamConf, HeliosConf};
+use crate::device::helios::HeliosDevice;
+use crate::errors::LJResult;
+
+/*
+self.protocol_version,
+self.le_state,
+self.playback_state,
+self.source,
+self.le_flags,
+self.playback_flags,
+self.source_flags,
+self.fullness,
+self.point_rate,
+self.point_count
+*/
+
+
+pub struct Status {
+    pub active: bool,
+    pub last_traced_at: String,
+    pub properties: Vec<String>
+}
+
+pub trait Device {
+    fn status( &self ) -> Status;
+    fn draw(
+	    &self,
+	    frame: Vec<Point>,
+    	speed: u32,
+    ) -> LJResult<()> ;
+    fn stop(&mut self) -> LJResult<()>;
+}
+
+pub fn device_factory(config: &Conf) -> LJResult<Box<dyn Device>> {
+	let device = match &config.dac {
+		DacFamily::Helios(conf) => Box::new(HeliosDevice::new(conf)?),
+		DacFamily::Etherdream(_conf) => todo!(),
+	};
+	Ok(device)
+}