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use std::{
future::Future,
io::{BufReader, Read},
marker::Send,
sync::Arc,
};
use tokio::{
sync::{mpsc::Sender, Mutex},
task::JoinSet,
};
use zbus::Connection;
use crate::{
dbus::{
player::{PlaybackStatus, PlayerProxy},
playerctld::PlayerctldProxy,
},
i3bar::{Block, Click},
Error, IGNORED,
};
pub use icon::Icon;
pub use next::Next;
pub use play::Play;
pub use prev::Prev;
pub use title::Title;
pub use volume::Volume;
mod icon;
mod next;
mod play;
mod prev;
mod title;
mod volume;
pub trait Component: Send + 'static {
const NAME: &'static str;
type Updater: Update;
type Colorer: Update;
type Handler: Button;
}
pub trait Runner: Component + private::Sealed {
fn run<R: Read + Send>(reader: R) -> impl Future<Output = Result<(), Error>> + Send {
async move {
use std::io::BufRead;
let conn = Connection::session().await?;
let listeners = tokio::spawn(Self::listeners(conn.clone()));
let buf_reader = BufReader::new(reader);
for click in buf_reader
.lines()
.map_while(Result::ok)
.flat_map(|s| serde_json::from_str::<Click>(&s))
{
let _ = <Self::Handler as Button>::handle(conn.clone(), click).await;
}
listeners.await?
}
}
fn listeners(conn: Connection) -> impl Future<Output = Result<(), Error>> + Send {
async move {
use futures_util::StreamExt;
let mut join_set = JoinSet::new();
let (tx_player, mut rx_player) = tokio::sync::mpsc::channel(128);
let (tx_status, mut rx_status) = tokio::sync::mpsc::channel(128);
let (tx_value, mut rx_value) = tokio::sync::mpsc::channel(128);
let proxy = PlayerctldProxy::builder(&conn).build().await?;
tokio::spawn(async move {
let mut last = proxy
.player_names()
.await?
.into_iter()
.find(|s| s.split('.').nth(3).is_some_and(|s| !IGNORED.contains(&s)))
.unwrap_or_default();
tx_player.send(last.clone()).await?;
let mut stream = proxy.receive_active_player_change_end().await?;
while let Some(signal) = stream.next().await {
let name = signal.args()?.name.to_owned();
if name != last
&& name
.split('.')
.nth(3)
.is_some_and(|s| !IGNORED.contains(&s))
{
last.clone_from(&name);
tx_player.send(name).await?;
}
}
Result::<_, Error>::Ok(())
});
let block = Arc::new(Mutex::new(Block {
name: Some(format!("mpris-{}", Self::NAME)),
..Default::default()
}));
loop {
let updated = tokio::select! {
Some(name) = rx_player.recv() => {
join_set.shutdown().await;
let mut block = block.lock().await;
block.full_text = String::new();
block.instance = None;
if !name.is_empty() {
block.instance.clone_from(&Some(name.clone()));
let proxy = PlayerProxy::builder(&conn)
.destination(name)?
.build()
.await?;
join_set.spawn(<Self::Colorer as Update>::listen(tx_status.clone(), proxy.clone()));
join_set.spawn(<Self::Updater as Update>::listen(tx_value.clone(), proxy));
false
} else {
true
}
}
Some(color) = rx_status.recv() => <Self::Colorer as Update>::update(color, block.clone()).await?,
Some(value) = rx_value.recv() => <Self::Updater as Update>::update(value, block.clone()).await?
};
if updated {
let s = block.lock().await;
s.write_stdout()?;
}
}
}
}
}
impl<T: Component> Runner for T {}
mod private {
pub trait Sealed {}
impl<T: super::Component> Sealed for T {}
}
pub trait Update: Send + 'static {
type Value: Send;
fn listen(
tx: Sender<Self::Value>,
proxy: PlayerProxy<'_>,
) -> impl Future<Output = Result<(), Error>> + Send;
fn update(
value: Self::Value,
block: Arc<Mutex<Block>>,
) -> impl Future<Output = Result<bool, Error>> + Send;
}
impl Update for () {
type Value = ();
async fn listen(_: Sender<Self::Value>, _: PlayerProxy<'_>) -> Result<(), Error> {
Ok(())
}
async fn update(_: Self::Value, _: Arc<Mutex<Block>>) -> Result<bool, Error> {
Ok(false)
}
}
impl Update for PlaybackStatus {
type Value = (Option<String>, Option<String>);
async fn listen(tx: Sender<Self::Value>, proxy: PlayerProxy<'_>) -> Result<(), Error> {
use futures_util::StreamExt;
let black = std::env::var("BASE16_COLOR_00_HEX").ok();
let cyan = std::env::var("BASE16_COLOR_0C_HEX").ok();
let yellow = std::env::var("BASE16_COLOR_0A_HEX").ok();
let mut stream = proxy.receive_playback_status_changed().await;
while let Some(signal) = stream.next().await {
if let Ok(value) = signal.get().await {
let val = match value {
PlaybackStatus::Playing => (black.clone(), cyan.clone()),
PlaybackStatus::Paused => (black.clone(), yellow.clone()),
PlaybackStatus::Stopped => (None, None),
};
tx.send(val).await?;
}
}
Ok(())
}
async fn update(
(color, background): Self::Value,
block: Arc<Mutex<Block>>,
) -> Result<bool, Error> {
let mut block = block.lock().await;
block.color = color;
block.background = background;
Ok(true)
}
}
pub trait Button {
fn handle(
conn: zbus::Connection,
click: crate::i3bar::Click,
) -> impl Future<Output = Result<(), Error>> + Send;
}
impl Button for () {
async fn handle(_: zbus::Connection, _: crate::i3bar::Click) -> Result<(), Error> {
Ok(())
}
}
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