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// Copyright (C) 2020-2025 Michael herstine <sp1ff@pobox.com>
//
// This file is part of mpdpopm.
//
// mpdpopm is free software: you can redistribute it and/or modify it under the terms of the GNU
// General Public License as published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// mpdpopm is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
// Public License for more details.
//
// You should have received a copy of the GNU General Public License along with mpdpopm. If not,
// see <http://www.gnu.org/licenses/>.
//! # mpdpopm
//!
//! Maintain ratings & playcounts for your mpd server.
//!
//! # Introduction
//!
//! This is a companion daemon for [mpd](https://www.musicpd.org/) that maintains play counts &
//! ratings. Similar to [mpdfav](https://github.com/vincent-petithory/mpdfav), but written in Rust
//! (which I prefer to Go), it will allow you to maintain that information in your tags, as well as
//! the sticker database, by invoking external commands to keep your tags up-to-date (something
//! along the lines of [mpdcron](https://alip.github.io/mpdcron)).
//!
//! # Commands
//!
//! I'm currently sending all commands over one (configurable) channel.
//!
#![recursion_limit = "512"] // for the `select!' macro
pub mod clients;
pub mod config;
pub mod filters_ast;
pub mod playcounts;
pub mod storage;
pub mod vars;
#[rustfmt::skip]
#[allow(clippy::extra_unused_lifetimes)]
#[allow(clippy::needless_lifetimes)]
#[allow(clippy::let_unit_value)]
#[allow(clippy::just_underscores_and_digits)]
pub mod filters {
include!(concat!(env!("OUT_DIR"), "/src/filters.rs"));
}
use crate::{
clients::{Client, IdleClient, IdleSubSystem},
config::{Config, Connection},
playcounts::PlayState,
};
use anyhow::{Context, Error};
use futures::{future::FutureExt, pin_mut, select};
use tokio::{
signal,
signal::unix::{SignalKind, signal},
time::{Duration, sleep},
};
use tracing::{debug, error, info};
/// Core `mppopmd' logic
pub async fn mpdpopm(cfg: Config) -> std::result::Result<(), Error> {
info!("mpdpopm {} beginning.", vars::VERSION);
let mut client =
match cfg.conn {
Connection::Local { ref path } => Client::open(path)
.await
.with_context(|| format!("Failed to open socket at `{}`", path.display()))?,
Connection::TCP { ref host, port } => Client::connect(format!("{}:{}", host, port))
.await
.with_context(|| format!("Failed to connect to client at `{}:{}`", host, port))?,
};
let mut state = PlayState::new(&mut client, cfg.played_thresh)
.await
.context("Failed to construct PlayState")?;
let mut idle_client = match cfg.conn {
Connection::Local { ref path } => IdleClient::open(path)
.await
.context("Failed to open idle client")?,
Connection::TCP { ref host, port } => IdleClient::connect(format!("{}:{}", host, port))
.await
.context("Failed to connect to TCP idle client")?,
};
idle_client
.subscribe(&cfg.commands_chan)
.await
.context("Failed to subscribe to idle_client")?;
let mut hup = signal(SignalKind::hangup()).unwrap();
let mut kill = signal(SignalKind::terminate()).unwrap();
let ctrl_c = signal::ctrl_c().fuse();
let sighup = hup.recv().fuse();
let sigkill = kill.recv().fuse();
let tick = sleep(Duration::from_millis(cfg.poll_interval_ms)).fuse();
pin_mut!(ctrl_c, sighup, sigkill, tick);
let mut done = false;
while !done {
debug!("selecting...");
{
// `idle_client' mutably borrowed here
let mut idle = Box::pin(idle_client.idle().fuse());
loop {
select! {
_ = ctrl_c => {
info!("got ctrl-C");
done = true;
break;
},
_ = sighup => {
info!("got SIGHUP");
done = true;
break;
},
_ = sigkill => {
info!("got SIGKILL");
done = true;
break;
},
_ = tick => {
tick.set(sleep(Duration::from_millis(cfg.poll_interval_ms)).fuse());
state.update(&mut client)
.await
.context("PlayState update failed")?
},
res = idle => match res {
Ok(subsys) => {
debug!("subsystem {} changed", subsys);
if subsys == IdleSubSystem::Player {
state.update(&mut client)
.await
.context("PlayState update failed")?
} else if subsys == IdleSubSystem::Message {
error!("Message handling is not supported!");
}
break;
},
Err(err) => {
debug!("error {err:#?} on idle");
done = true;
break;
}
}
}
}
}
}
info!("mpdpopm exiting.");
Ok(())
}
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