move redis stuff to its own file

Cargo.toml

@@ -6,6 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+ctrlc = "3.4.0"
 helios-dac = { version = "0.1", default-features = false, features = ["native"] }
 redis = "0.23.0"
 ron = "0.8.0"

src/main.rs

@@ -3,30 +3,31 @@
 /// https://github.com/Grix/helios_dac/blob/master/docs/udev_rules_for_linux.md
 ///
 
+mod redis_ctrl;
+
 use helios_dac::{Frame,
 		 Point,
 		 DeviceStatus,
 		 // Coordinate,
 		 Color};
+use helios_dac::NativeHeliosDacController;
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::Arc;
 
-use redis::{ //RedisResult,
-    Client,
-    Connection,
-    Commands
-};
-
-use ron::de::from_str;
-
-type Line = Vec<(f32,f32,u32)>;
-
+use redis_ctrl::RedisCtrl;
 
 const CENTER : (u16,u16) = (2000, 2000);
 
-pub fn main() -> Result<(), Box<dyn std::error::Error>> {
-    use helios_dac::NativeHeliosDacController;
 
-    let client = Client::open("redis://127.0.0.1/")?;
-    let mut con = client.get_connection()?;
+pub fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let running = Arc::new(AtomicBool::new(true));
+    let r = running.clone();
+
+    ctrlc::set_handler(move || {
+        r.store(false, Ordering::SeqCst);
+    }).expect("Error setting Ctrl-C handler");
+    
+    let mut rs = RedisCtrl::new()?;
     
     let controller = NativeHeliosDacController::new()?;
     let devices = controller.list_devices()?;
@@ -34,24 +35,25 @@ pub fn main() -> Result<(), Box<dyn std::error::Error>> {
     let device = devices.into_iter().next().unwrap();
     let mut device = device.open()?;
     
-    for _ in 0..100 {
-	let frame = get_next_frame(1000, &mut con)?;
+    while running.load(Ordering::SeqCst) {	
+	let frame = get_next_frame(1000, &mut rs)?;
 	
 	while let Ok(DeviceStatus::NotReady) = device.status() {
 	}
         device.write_frame(frame)?;
     }
 
+    println!("Exiting, stoping device.");
     device.stop()?;
     Ok(())
 }
 
 fn get_next_frame(
     speed: u32,
-    con: &mut Connection
+    rs: &mut RedisCtrl
 ) -> Result<Frame, Box<dyn std::error::Error>> {
-    let val : String = con.get("/pl/0/0")?;
-    let line : Line = from_str(&val)?;
+
+    let line = rs.get("/pl/0/0")?;
     let line : Vec<Point> = line.iter()
 	.map(tuple_to_point)
 	.collect();

src/redis_ctrl.rs

@@ -0,0 +1,32 @@
+use redis::{
+    Client,
+    Connection,
+    Commands
+};
+use ron::de::from_str;
+
+pub type Line = Vec<(f32,f32,u32)>;
+
+pub struct RedisCtrl {
+    pub client: Client,
+    pub connection: Connection
+}
+
+impl RedisCtrl {
+
+    pub fn new() -> Result<Self, Box<dyn std::error::Error>> {
+	let client = Client::open("redis://127.0.0.1/")?;
+	let connection = client.get_connection()?;
+	Ok(RedisCtrl { client, connection })
+    }
+
+    pub fn get(
+	&mut self,
+	key: &str
+    ) -> Result<Line, Box<dyn std::error::Error>> {
+	let val : String = self.connection.get(key)?;
+	let line : Line = from_str(&val)?;
+	Ok(line)
+    }
+}
+