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package main
// The spotify backend is based on the librespot-golang code released under MIT
// license.
// Authors of the librespot-golang code are:
// Copyright (c) 2015 Paul Lietar
// Copyright (c) 2015 badfortrains
// Copyright (c) 2018 Guillaume "xplodwild" Lesniak
import (
"errors"
"os"
"strings"
"github.com/librespot-org/librespot-golang/Spotify"
"github.com/librespot-org/librespot-golang/librespot"
"github.com/librespot-org/librespot-golang/librespot/core"
"github.com/librespot-org/librespot-golang/librespot/utils"
"muhq.space/go/wrms/llog"
)
const (
deviceName = "wrms"
)
type SpotifyConfig struct {
Username string `yaml:"username"`
Password string `yaml:"password"`
}
type SpotifyBackend struct {
session *core.Session
}
func NewSpotify(config *SpotifyConfig) (*SpotifyBackend, error) {
spotify := SpotifyBackend{}
if config == nil {
config = &SpotifyConfig{}
}
usernameEnv := os.Getenv("WRMS_SPOTIFY_USER")
if usernameEnv != "" {
config.Username = usernameEnv
}
passwordEnv := os.Getenv("WRMS_SPOTIFY_PASSWORD")
if passwordEnv != "" {
config.Password = passwordEnv
}
if config.Username == "" || config.Password == "" {
return nil, errors.New("User and password for spotify must be provided")
}
var err error
spotify.session, err = librespot.Login(config.Username, config.Password, deviceName)
if err != nil {
return nil, err
}
return &spotify, nil
}
func (_ *SpotifyBackend) OnSongFinished(*Song) {}
func (spotify *SpotifyBackend) Play(song *Song, player *Player) {
trackID := song.Uri
session := spotify.session
llog.Debug("Loading track for play: %v", trackID)
// Get the track metadata: it holds information about which files and encodings are available
track, err := session.Mercury().GetTrack(utils.Base62ToHex(trackID))
if err != nil {
llog.Error("Error loading track: %s", err)
return
}
// For now, select the OGG 160kbps variant of the track. The "high quality"
// setting in the official Spotify app is the OGG 320kbps variant.
var selectedFile *Spotify.AudioFile
llog.DDebug("Available Formats:")
for _, file := range track.GetFile() {
llog.DDebug("- %v", file.GetFormat())
if file.GetFormat() == Spotify.AudioFile_OGG_VORBIS_160 {
selectedFile = file
}
}
// Synchronously load the track
audioFile, err := session.Player().LoadTrack(selectedFile, track.GetGid())
if err != nil {
llog.Fatal("Error while loading track: %s\n", err)
}
player.PlayData(audioFile)
}
func (spotify *SpotifyBackend) Search(keyword string) []Song {
session := spotify.session
resp, err := session.Mercury().Search(keyword, 12, session.Country(), session.Username())
if err != nil {
llog.Error("Failed to search: %s", err)
return []Song{}
}
res := resp.Results
llog.DDebug("Search results for %s", keyword)
llog.DDebug("=============================")
if res.Error != nil {
llog.Error("Search result error: %s", res.Error)
}
llog.Debug("\nTracks: %d (total %d)\n", len(res.Tracks.Hits), res.Tracks.Total)
results := []Song{}
for _, track := range res.Tracks.Hits {
uriParts := strings.Split(track.Uri, ":")
results = append(results, NewSong(track.Name, track.Artists[0].Name,
"spotify", uriParts[len(uriParts)-1]))
}
return results
}
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