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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"
"fmt"
"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 SpotifyBackend struct {
session *core.Session
}
func NewSpotify() (*SpotifyBackend, error) {
spotify := SpotifyBackend{}
var err error
username := os.Getenv("WRMS_SPOTIFY_USER")
password := os.Getenv("WRMS_SPOTIFY_PASSWORD")
if username == "" || password == "" {
return nil, errors.New("User and password for spotify must be provided")
}
spotify.session, err = librespot.Login(username, password, deviceName)
if err != nil {
return nil, err
}
return &spotify, nil
}
func (spotify *SpotifyBackend) Play(song *Song, player *Player) {
trackID := song.Uri
session := spotify.session
fmt.Println("Loading track for play: ", 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 {
fmt.Println("Error loading track: ", err)
return
}
fmt.Println("Track:", track.GetName())
// 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
for _, file := range track.GetFile() {
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 {
fmt.Println("Failed to search:", err)
return []Song{}
}
res := resp.Results
fmt.Println("Search results for ", keyword)
fmt.Println("=============================")
if res.Error != nil {
fmt.Println("Search result error:", res.Error)
}
fmt.Printf("\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]))
// fmt.Printf(" => %v (%s)\n", track, track.Uri)
}
return results
}
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