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//! The module defines MPD status data structures
use convert::FromIter;
use error::{Error, ParseError};
use rustc_serialize::{Encodable, Encoder};
use song::{Id, QueuePlace};
use std::fmt;
use std::str::FromStr;
use time::Duration;
/// MPD status
#[derive(Debug, PartialEq, Clone, Default)]
pub struct Status {
/// volume (0-100, or -1 if volume is unavailable (e.g. for HTTPD output type)
pub volume: i8,
/// repeat mode
pub repeat: bool,
/// random mode
pub random: bool,
/// single mode
pub single: bool,
/// consume mode
pub consume: bool,
/// queue version number
pub queue_version: u32,
/// queue length
pub queue_len: u32,
/// playback state
pub state: State,
/// currently playing song place in the queue
pub song: Option<QueuePlace>,
/// next song to play place in the queue
pub nextsong: Option<QueuePlace>,
/// time current song played, and total song duration (in seconds resolution)
pub time: Option<(Duration, Duration)>,
/// elapsed play time current song played (in milliseconds resolution)
pub elapsed: Option<Duration>,
/// current song duration
pub duration: Option<Duration>,
/// current song bitrate, kbps
pub bitrate: Option<u32>,
/// crossfade timeout, seconds
pub crossfade: Option<Duration>,
/// mixramp threshold, dB
pub mixrampdb: f32,
/// mixramp duration, seconds
pub mixrampdelay: Option<Duration>,
/// current audio playback format
pub audio: Option<AudioFormat>,
/// current DB updating job number (if DB updating is in progress)
pub updating_db: Option<u32>,
/// last player error (if happened, can be reset with `clearerror()` method)
pub error: Option<String>,
/// replay gain mode
pub replaygain: Option<ReplayGain>,
}
impl Encodable for Status {
fn encode<S: Encoder>(&self, e: &mut S) -> Result<(), S::Error> {
e.emit_struct("Status", 21, |e| {
e.emit_struct_field("volume", 0, |e| self.volume.encode(e))?;
e.emit_struct_field("repeat", 1, |e| self.repeat.encode(e))?;
e.emit_struct_field("random", 2, |e| self.random.encode(e))?;
e.emit_struct_field("single", 3, |e| self.single.encode(e))?;
e.emit_struct_field("consume", 4, |e| self.consume.encode(e))?;
e.emit_struct_field("queue_version", 5, |e| self.queue_version.encode(e))?;
e.emit_struct_field("queue_len", 6, |e| self.queue_len.encode(e))?;
e.emit_struct_field("state", 7, |e| self.state.encode(e))?;
e.emit_struct_field("song", 8, |e| self.song.encode(e))?;
e.emit_struct_field("nextsong", 9, |e| self.nextsong.encode(e))?;
e.emit_struct_field("time", 10, |e| {
e.emit_option(|e| match self.time {
Some(p) => {
e.emit_option_some(|e| {
e.emit_tuple(2, |e| {
e.emit_tuple_arg(0, |e| p.0.num_seconds().encode(e))?;
e.emit_tuple_arg(1, |e| p.1.num_seconds().encode(e))?;
Ok(())
})
})
}
None => e.emit_option_none(),
})
})?;
e.emit_struct_field("elapsed", 11, |e| {
e.emit_option(|e| match self.elapsed {
Some(d) => e.emit_option_some(|e| d.num_seconds().encode(e)),
None => e.emit_option_none(),
})
})?;
e.emit_struct_field("duration", 12, |e| {
e.emit_option(|e| match self.duration {
Some(d) => e.emit_option_some(|e| d.num_seconds().encode(e)),
None => e.emit_option_none(),
})
})?;
e.emit_struct_field("bitrate", 13, |e| self.bitrate.encode(e))?;
e.emit_struct_field("crossfade", 14, |e| {
e.emit_option(|e| match self.crossfade {
Some(d) => e.emit_option_some(|e| d.num_seconds().encode(e)),
None => e.emit_option_none(),
})
})?;
e.emit_struct_field("mixrampdb", 15, |e| self.mixrampdb.encode(e))?;
e.emit_struct_field("mixrampdelay", 16, |e| {
e.emit_option(|e| match self.mixrampdelay {
Some(d) => e.emit_option_some(|e| d.num_seconds().encode(e)),
None => e.emit_option_none(),
})
})?;
e.emit_struct_field("audio", 17, |e| self.audio.encode(e))?;
e.emit_struct_field("updating_db", 18, |e| self.updating_db.encode(e))?;
e.emit_struct_field("error", 19, |e| self.error.encode(e))?;
e.emit_struct_field("replaygain", 20, |e| self.replaygain.encode(e))?;
Ok(())
})
}
}
impl FromIter for Status {
fn from_iter<I: Iterator<Item = Result<(String, String), Error>>>(iter: I) -> Result<Status, Error> {
let mut result = Status::default();
for res in iter {
let line = try!(res);
match &*line.0 {
"volume" => result.volume = try!(line.1.parse()),
"repeat" => result.repeat = &*line.1 == "1",
"random" => result.random = &*line.1 == "1",
"single" => result.single = &*line.1 == "1",
"consume" => result.consume = &*line.1 == "1",
"playlist" => result.queue_version = try!(line.1.parse()),
"playlistlength" => result.queue_len = try!(line.1.parse()),
"state" => result.state = try!(line.1.parse()),
"songid" => {
match result.song {
None => {
result.song = Some(QueuePlace {
id: Id(try!(line.1.parse())),
pos: 0,
prio: 0,
})
}
Some(ref mut place) => place.id = Id(try!(line.1.parse())),
}
}
"song" => {
match result.song {
None => {
result.song = Some(QueuePlace {
pos: try!(line.1.parse()),
id: Id(0),
prio: 0,
})
}
Some(ref mut place) => place.pos = try!(line.1.parse()),
}
}
"nextsongid" => {
match result.nextsong {
None => {
result.nextsong = Some(QueuePlace {
id: Id(try!(line.1.parse())),
pos: 0,
prio: 0,
})
}
Some(ref mut place) => place.id = Id(try!(line.1.parse())),
}
}
"nextsong" => {
match result.nextsong {
None => {
result.nextsong = Some(QueuePlace {
pos: try!(line.1.parse()),
id: Id(0),
prio: 0,
})
}
Some(ref mut place) => place.pos = try!(line.1.parse()),
}
}
"time" => {
let mut splits = line.1.splitn(2, ':').map(|v| v.parse().map_err(ParseError::BadInteger).map(Duration::seconds));
result.time = try!({
match (splits.next(), splits.next()) {
(Some(Ok(a)), Some(Ok(b))) => Ok(Some((a, b))),
(Some(Err(e)), _) |
(_, Some(Err(e))) => Err(e),
_ => Ok(None),
}
})
}
// TODO" => float errors don't work on stable
"elapsed" => result.elapsed = line.1.parse::<f32>().ok().map(|v| Duration::milliseconds((v * 1000.0) as i64)),
"duration" => result.duration = line.1.parse::<f32>().ok().map(|v| Duration::milliseconds((v * 1000.0) as i64)),
"bitrate" => result.bitrate = Some(try!(line.1.parse())),
"xfade" => result.crossfade = Some(Duration::seconds(try!(line.1.parse()))),
// "mixrampdb" => 0.0, //get_field!(map, "mixrampdb"),
// "mixrampdelay" => None, //get_field!(map, opt "mixrampdelay").map(|v: f64| Duration::milliseconds((v * 1000.0) as i64)),
"audio" => result.audio = Some(try!(line.1.parse())),
"updating_db" => result.updating_db = Some(try!(line.1.parse())),
"error" => result.error = Some(line.1.to_owned()),
"replay_gain_mode" => result.replaygain = Some(try!(line.1.parse())),
_ => (),
}
}
Ok(result)
}
}
/// Audio playback format
#[derive(Debug, Copy, Clone, PartialEq, RustcEncodable)]
pub struct AudioFormat {
/// sample rate, kbps
pub rate: u32,
/// sample resolution in bits, can be 0 for floating point resolution
pub bits: u8,
/// number of channels
pub chans: u8,
}
impl FromStr for AudioFormat {
type Err = ParseError;
fn from_str(s: &str) -> Result<AudioFormat, ParseError> {
let mut it = s.split(':');
Ok(AudioFormat {
rate: try!(it.next().ok_or(ParseError::NoRate).and_then(|v| v.parse().map_err(ParseError::BadRate))),
bits: try!(it.next()
.ok_or(ParseError::NoBits)
.and_then(|v| if &*v == "f" {
Ok(0)
} else {
v.parse().map_err(ParseError::BadBits)
})),
chans: try!(it.next().ok_or(ParseError::NoChans).and_then(|v| v.parse().map_err(ParseError::BadChans))),
})
}
}
/// Playback state
#[derive(Debug, Copy, Clone, PartialEq, RustcEncodable, RustcDecodable)]
pub enum State {
/// player stopped
Stop,
/// player is playing
Play,
/// player paused
Pause,
}
impl Default for State {
fn default() -> State {
State::Stop
}
}
impl FromStr for State {
type Err = ParseError;
fn from_str(s: &str) -> Result<State, ParseError> {
match s {
"stop" => Ok(State::Stop),
"play" => Ok(State::Play),
"pause" => Ok(State::Pause),
_ => Err(ParseError::BadState(s.to_owned())),
}
}
}
/// Replay gain mode
#[derive(Debug, Clone, Copy, PartialEq, RustcEncodable, RustcDecodable)]
pub enum ReplayGain {
/// off
Off,
/// track
Track,
/// album
Album,
/// auto
Auto,
}
impl FromStr for ReplayGain {
type Err = ParseError;
fn from_str(s: &str) -> Result<ReplayGain, ParseError> {
use self::ReplayGain::*;
match s {
"off" => Ok(Off),
"track" => Ok(Track),
"album" => Ok(Album),
"auto" => Ok(Auto),
_ => Err(ParseError::BadValue(s.to_owned())),
}
}
}
impl fmt::Display for ReplayGain {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::ReplayGain::*;
f.write_str(match *self {
Off => "off",
Track => "track",
Album => "album",
Auto => "auto",
})
}
}