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use errors::{MelodyErrors, MelodyErrorsKind};
use rand::{thread_rng, Rng};
use rodio;
use song::{Playlist, Song};
use std::fmt;
use std::fs::File;
use std::io::{BufReader, Write};
use tabwriter::TabWriter;
use utils::{fmt_duration, supported_song};
#[derive(Clone)]
pub enum MusicPlayerStatus {
Stopped(Option<Song>),
NowPlaying(Song),
Paused(Song),
}
impl fmt::Display for MusicPlayerStatus {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use MusicPlayerStatus::*;
match self.clone() {
Paused(song) => write!(f, "[Paused] : {}", song),
NowPlaying(song) => write!(f, "[Now Playing] : {}", song),
Stopped(s) => match s {
Some(song) => write!(f, "[Stopped] : Last Played - {}", song),
None => write!(f, "[Stopped]"),
},
}
}
}
pub struct MusicPlayer {
playlist: Vec<Song>,
sink: rodio::Sink,
current: Option<Song>,
previous: Option<Song>,
playing_time: (::std::time::Instant, ::std::time::Duration),
}
impl MusicPlayer {
pub fn new(playlist: Playlist) -> Self {
#[allow(deprecated)]
let endpoint =
rodio::default_output_device().expect("Failed to find default music endpoint");
MusicPlayer {
playlist: c![song, for song in playlist.tracks, if supported_song(song.file())],
sink: rodio::Sink::new(&endpoint),
current: None,
previous: None,
playing_time: (
::std::time::Instant::now(),
::std::time::Duration::from_secs(0),
),
}
}
pub fn shuffle(&mut self) {
thread_rng().shuffle(&mut self.playlist);
}
pub fn start(&mut self) -> Result<(), MelodyErrors> {
if self.playlist.is_empty() {
Err(MelodyErrors::new(
MelodyErrorsKind::EmptyQueue,
"Playlist is empty",
None,
))
} else {
if self.sink.empty() {
self.playing_time.0 = ::std::time::Instant::now();
let current = self.playlist.remove(0);
let file =
File::open(¤t).expect(&format!("Failed to read {:?}", current.file));
let source = rodio::Decoder::new(BufReader::new(file))
.expect(&format!("Failed to decode {:?}", current.file));
self.sink.append(source);
self.current = Some(current);
};
Ok(())
}
}
pub fn resume(&mut self) {
self.sink.play();
self.playing_time.0 = ::std::time::Instant::now();
}
pub fn pause(&mut self) {
self.sink.pause();
self.playing_time.1 = self.playing_time.0.elapsed();
}
pub fn stop(&mut self) {
self.sink.stop();
self.previous = self.current.clone().and_then(|mut s| {
s.elapsed = self.playing_time.0.elapsed() + self.playing_time.1;
Some(s)
});
self.current = None;
}
pub fn play_next(&mut self) {
self.start().unwrap_or(());
}
pub fn volume(&self) -> f32 {
self.sink.volume()
}
pub fn set_volume(&mut self, volume: f32) {
self.sink.set_volume(volume)
}
pub fn lock(&self) {
self.sink.sleep_until_end();
}
pub fn queue(&self) -> &Vec<Song> {
&self.playlist
}
pub fn status(&self) -> MusicPlayerStatus {
if self.sink.empty() {
MusicPlayerStatus::Stopped(self.previous.clone())
} else if let Some(mut song) = self.current.clone() {
if self.sink.is_paused() {
song.elapsed = self.playing_time.1;
MusicPlayerStatus::Paused(song)
} else {
song.elapsed = self.playing_time.0.elapsed() + self.playing_time.1;
MusicPlayerStatus::NowPlaying(song)
}
} else {
MusicPlayerStatus::Stopped(self.previous.clone())
}
}
}
impl fmt::Display for MusicPlayer {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let now_playing = match self.current {
Some(ref song) => {
let status: &str = if self.sink.is_paused() {
"[paused] "
} else {
""
};
format!("{}{}\n", status, song)
}
None => String::new(),
};
let mut tw = TabWriter::new(Vec::new());
let mut lines: Vec<String> = vec![String::from(
"|\tArtist\t|\tAlbum\t|\tTitle\t|\tDuration\t|",
)];
for track in &self.playlist {
let duration = fmt_duration(&track.duration);
lines.push(format!(
"|\t{}\t|\t{}\t|\t{}\t|\t{}\t|",
track.artist().unwrap_or("Unkown Artist"),
track.album().unwrap_or("Unkown Album"),
track.title().unwrap_or("Unkown Title"),
duration
))
}
write!(tw, "{}", lines.join("\n")).unwrap();
tw.flush().unwrap();
write!(
f,
"{}{}",
now_playing,
String::from_utf8(tw.into_inner().unwrap()).unwrap()
)
}
}