feat: add action subcommand

src/main.rs

@@ -4,15 +4,18 @@ use std::{
     f32::consts::FRAC_PI_2,
     io::stdout,
     net::{Ipv4Addr, SocketAddr, UdpSocket},
+    num::ParseIntError,
+    str::FromStr,
     thread::sleep,
     time::Duration,
 };
 
-use clap::Parser;
+use clap::{Parser, Subcommand};
 use image::{Pixel, Rgb, RgbImage};
 use rand::Rng;
 
-use splink_client::{Layout, send_frame};
+use splink_client::{send_frame, Layout};
+use thiserror::Error;
 
 /// Blinkenwall v3 prototype client
 #[derive(Parser, Debug)]
@@ -28,8 +31,56 @@ struct Args {
 
     /// Controller's address
     remote_addr: SocketAddr,
+
+    /// The action to perform
+    #[clap(subcommand, rename_all = "kebab-case")]
+    action: Action,
 }
 
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+struct Color {
+    r: u8,
+    g: u8,
+    b: u8,
+}
+
+#[derive(Clone, Debug, Error)]
+enum ColorError {
+    #[error("Wrong parameter length")]
+    WrongLength,
+    #[error("Illegal integer")]
+    BadNumber(#[from] ParseIntError),
+}
+
+impl FromStr for Color {
+    type Err = ColorError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let s = s.strip_prefix('#').unwrap_or(s);
+
+        if s.len() != 6 {
+            return Err(ColorError::WrongLength);
+        }
+
+        let r = u8::from_str_radix(&s[0..2], 16)?;
+        let g = u8::from_str_radix(&s[2..4], 16)?;
+        let b = u8::from_str_radix(&s[4..6], 16)?;
+
+        Ok(Self { r, g, b })
+    }
+}
+
+impl From<Color> for Rgb<u8> {
+    fn from(c: Color) -> Rgb<u8> {
+        Rgb([c.r, c.g, c.b])
+    }
+}
+
+#[derive(Clone, Debug, PartialEq, Eq, Subcommand)]
+enum Action {
+    Solid { color: Color },
+    Clear,
+}
 
 fn get_frame(layout: Layout, frame: u32) -> RgbImage {
     #![allow(
@@ -105,20 +156,18 @@ fn main() -> anyhow::Result<()> {
         num_panels_v: 1,
     };
 
-    for frame in 0.. {
-        let image = get_frame(layout, frame);
-
-        print_image(&image);
-
+    match args.action {
+        Action::Solid { color } => {
+            let image = RgbImage::from_pixel(layout.width_px(), layout.height_px(), color.into());
             let frame_num: u32 = rand::thread_rng().gen();
             send_frame(&socket, layout, frame_num, &image)?;
-
-        sleep(Duration::from_millis(16));
         }
-
-    let image = RgbImage::from_fn(96, 64, |_x, y| {
-        [Rgb([0, 3, 1]), Rgb([1, 3, 0]), Rgb([3, 0, 1])][y as usize % 3]
-    });
+        Action::Clear => {
+            let image = RgbImage::new(layout.width_px(), layout.height_px());
+            let frame_num: u32 = rand::thread_rng().gen();
+            send_frame(&socket, layout, frame_num, &image)?;
+        }
+    }
 
     Ok(())
 }