lesavka/client/src/input/inputs.rs

// client/src/input/inputs.rs

use anyhow::{bail, Context, Result};
use evdev::{Device, EventType, KeyCode, RelativeAxisCode};
use tokio::time::{interval, Duration};
use tracing::{debug, info};

use crate::input::keyboard::KeyboardAggregator;
use crate::input::mouse::MouseAggregator;
use crate::input::camera::CameraCapture;
use crate::input::microphone::MicrophoneCapture;

/// A top-level aggregator that enumerates /dev/input/event*,
/// classifies them as keyboard vs. mouse vs. other,
/// spawns specialized aggregator objects, and can also
/// create stubs for camera/microphone logic if needed.
pub struct InputAggregator {
    pub dev_mode:   bool,
    keyboards:      Vec<KeyboardAggregator>,
    mice:           Vec<MouseAggregator>,
    camera:         Option<CameraCapture>,
    mic:            Option<MicrophoneCapture>,
}

impl InputAggregator {
    pub fn new(dev_mode: bool) -> Self {
        Self {
            dev_mode,
            keyboards: Vec::new(),
            mice: Vec::new(),
            camera: None,
            mic: None,
        }
    }

    /// Called once at startup: enumerates input devices,
    /// classifies them, and constructs a aggregator struct per type.
    pub fn init(&mut self) -> Result<()> {
        let paths = std::fs::read_dir("/dev/input")
            .context("Failed to read /dev/input")?;

        let mut found_any = false;

        for entry in paths {
            let entry = entry?;
            let path = entry.path();

            // skip anything that isn't "event*"
            if !path.file_name().map_or(false, |f| f.to_string_lossy().starts_with("event")) {
                continue;
            }

            // attempt open
            let mut dev = match Device::open(&path) {
                Ok(d) => d,
                Err(e) => {
                    tracing::debug!("Skipping {:?}, open error {e}", path);
                    continue;
                }
            };

            // non‑blocking so fetch_events never stalls the whole loop
            dev.set_nonblocking(true).with_context(|| format!("set_non_blocking {:?}", path))?;

            match classify_device(&dev) {
                DeviceKind::Keyboard => {
                    dev.grab().with_context(|| format!("grabbing keyboard {path:?}"))?;
                    info!("Grabbed keyboard {:?}", dev.name().unwrap_or("UNKNOWN"));

                    // pass dev_mode to aggregator
                    let kbd_agg = KeyboardAggregator::new(dev, self.dev_mode);
                    self.keyboards.push(kbd_agg);
                    found_any = true;
                    continue;
                }
                DeviceKind::Mouse => {
                    dev.grab().with_context(|| format!("grabbing mouse {path:?}"))?;
                    info!("Grabbed mouse {:?}", dev.name().unwrap_or("UNKNOWN"));

                    let mouse_agg = MouseAggregator::new(dev);
                    self.mice.push(mouse_agg);
                    found_any = true;
                    continue;
                }
                DeviceKind::Other => {
                    debug!("Skipping non-kbd/mouse device: {:?}", dev.name().unwrap_or("UNKNOWN"));
                    continue;
                }
            }
        }

        if !found_any {
            bail!("No suitable keyboard/mouse devices found or none grabbed.");
        }

        // Stubs for camera / mic:
        self.camera = Some(CameraCapture::new_stub());
        self.mic    = Some(MicrophoneCapture::new_stub());

        Ok(())
    }

    /// We spawn the sub-aggregators in a loop or using separate tasks.
    /// (For a real system: you'd spawn a separate task for each aggregator.)
    pub async fn run(&mut self) -> Result<()> {
        // Example approach: poll each aggregator in a simple loop
        let mut tick = interval(Duration::from_millis(10));
        loop {
            for kbd in &mut self.keyboards {
                kbd.process_events();
            }
            for mouse in &mut self.mice {
                mouse.process_events();
            }
            // camera / mic stubs could go here
            tick.tick().await;
        }
    }
}

#[derive(Debug)]
struct Classification {
    keyboard: Option<()>,
    mouse: Option<()>,
}

/// The classification function
fn classify_device(dev: &Device) -> DeviceKind {
    let evbits = dev.supported_events();

    // Keyboard logic
    if evbits.contains(EventType::KEY) {
        if let Some(keys) = dev.supported_keys() {
            if keys.contains(KeyCode::KEY_A) || keys.contains(KeyCode::KEY_ENTER) {
                return DeviceKind::Keyboard;
            }
        }
    }

    // Mouse logic
    if evbits.contains(EventType::RELATIVE) {
        if let (Some(rel), Some(keys)) =
            (dev.supported_relative_axes(), dev.supported_keys())
        {
            let has_xy = rel.contains(RelativeAxisCode::REL_X)
                      && rel.contains(RelativeAxisCode::REL_Y);
            let has_btn = keys.contains(KeyCode::BTN_LEFT)
                       || keys.contains(KeyCode::BTN_RIGHT);
            if has_xy && has_btn {
                return DeviceKind::Mouse;
            }
        }
    }

    DeviceKind::Other
}

/// Internal enum for device classification
#[derive(Debug, Clone, Copy)]
enum DeviceKind {
    Keyboard,
    Mouse,
    Other,
}