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package main
import (
"fmt"
"io"
"log"
"os/exec"
"syscall"
)
type Backend interface {
Play(song *Song, player *Player)
Search(keyword string) []Song
}
type Player struct {
Backends map[string]Backend
mpv *exec.Cmd
wrms *Wrms
}
func NewPlayer(wrms *Wrms) Player {
available_backends := map[string]Backend{}
spotify, err := NewSpotify()
if err != nil {
// log.Fatalln("Error during initialization of the spotify backend:", err.Error())
log.Println("Error during initialization of the spotify backend:", err.Error())
}
available_backends["spotify"] = spotify
available_backends["youtube"] = &YoutubeBackend{}
available_backends["dummy"] = &DummyBackend{}
return Player{available_backends, nil, wrms}
}
func (player *Player) Play(song *Song) {
if player.mpv != nil {
log.Println("Send SIGCONT to mpv subprocess")
player.mpv.Process.Signal(syscall.SIGCONT)
return
}
player.Backends[song.Source].Play(song, player)
}
func (player *Player) runMpv() {
_, err := player.mpv.CombinedOutput()
if err != nil {
log.Fatal(err)
}
log.Println("mpv finished. Resetting mpv, the current song and call play")
player.mpv = nil
player.wrms.CurrentSong.Uri = ""
player.wrms.PlayPause()
}
func (player *Player) PlayUri(uri string) {
log.Println("Start mpv with ", uri)
player.mpv = exec.Command("mpv", "--no-video", uri)
go player.runMpv()
}
func (player *Player) PlayData(data io.Reader) {
if player.mpv != nil {
log.Fatal("Player has already an mpv subprocess")
}
player.mpv = exec.Command("mpv", "-")
stdin, err := player.mpv.StdinPipe()
if err != nil {
log.Fatal(err)
}
go func() {
defer stdin.Close()
if _, err := io.Copy(stdin, data); err != nil {
log.Fatal(fmt.Sprintf("Failed to write song data to mpv (%v)", err))
}
}()
go player.runMpv()
}
func (player *Player) Pause() {
if player.mpv != nil {
log.Println("Send SIGSTOP to mpv subprocess")
player.mpv.Process.Signal(syscall.SIGSTOP)
}
}
func (player *Player) Search(pattern string) []Song {
results := []Song{}
for _, backend := range player.Backends {
results = append(results, backend.Search(pattern)...)
}
return results
}
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