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//! Sound notifications for agent state changes.
//!
//! Embeds mp3 files in the binary and plays them via system audio tools.
//! Uses afplay (macOS) or paplay/aplay (Linux) — no Rust audio dependencies.
use std::io::Write;
use std::path::Path;
use std::process::{Command, Output};
use tracing::warn;
const DISABLE_SOUND_ENV: &str = "HERDR_DISABLE_SOUND";
static SOUND_DONE: &[u8] = include_bytes!("../assets/sounds/done.mp3");
static SOUND_REQUEST: &[u8] = include_bytes!("../assets/sounds/request.mp3");
/// Which notification sound to play.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum Sound {
/// Agent finished work (transitioned to Idle).
Done,
/// Agent needs input (transitioned to Blocked).
Request,
}
/// Play a notification sound in a background thread.
/// Silently does nothing if no audio player is available.
pub fn play(sound: Sound, config: &crate::config::SoundConfig) {
if sound_playback_disabled_by_env() {
return;
}
let custom_path = config.path_for(sound);
std::thread::spawn(move || {
if let Some(path) = custom_path {
match play_file(&path) {
Ok(()) => return,
Err(err) => {
warn!(path = %path.display(), sound = ?sound, err = %err, "custom sound playback failed, falling back to built-in sound")
}
}
}
let data = match sound {
Sound::Done => SOUND_DONE,
Sound::Request => SOUND_REQUEST,
};
if let Err(err) = play_bytes(data) {
warn!(sound = ?sound, err = %err, "sound playback failed");
}
});
}
fn sound_playback_disabled_by_env() -> bool {
std::env::var_os(DISABLE_SOUND_ENV).is_some() || std::env::var_os("NEXTEST").is_some()
}
fn play_file(path: &Path) -> Result<(), String> {
match run_player(path) {
Ok(output) if output.status.success() => Ok(()),
Ok(output) => Err(format!("player exited with {}", output.status)),
Err(err) => Err(err),
}
}
fn play_bytes(data: &[u8]) -> Result<(), String> {
// Write to a temp file (audio players need a file path)
let tmp = std::env::temp_dir().join(format!("herdr-sound-{}.mp3", std::process::id()));
let mut file = std::fs::File::create(&tmp).map_err(|e| e.to_string())?;
file.write_all(data).map_err(|e| e.to_string())?;
drop(file);
let result = run_player(&tmp);
let _ = std::fs::remove_file(&tmp);
match result {
Ok(output) if output.status.success() => Ok(()),
Ok(output) => Err(format!("player exited with {}", output.status)),
Err(e) => Err(e),
}
}
fn run_player(path: &Path) -> Result<Output, String> {
if cfg!(target_os = "macos") {
Command::new("afplay")
.arg(path)
.output()
.map_err(|e| format!("no audio player available: {e}"))
} else {
// Try paplay (PulseAudio) first, fall back to aplay (ALSA)
Command::new("paplay")
.arg(path)
.output()
.or_else(|_| Command::new("aplay").arg(path).output())
.map_err(|e| format!("no audio player available: {e}"))
}
}
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