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108 lines
2.4 KiB
108 lines
2.4 KiB
package main
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import (
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"fmt"
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"io"
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"strings"
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"time"
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dbus "github.com/guelfey/go.dbus"
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)
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type SpotifyPlaybackInfo struct {
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Time time.Duration
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Duration time.Duration
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Artist string
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Title string
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Album string
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IsPlaying bool
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}
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type SpotifyClient interface {
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io.Closer
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GetPlaybackInfo() (SpotifyPlaybackInfo, error)
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}
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func newSpotify() (SpotifyClient, error) {
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conn, err := dbus.SessionBus()
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if err != nil {
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return nil, fmt.Errorf("Failed to connect to session bus: %w", err)
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}
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busObject := conn.Object("org.mpris.MediaPlayer2.spotify", "/org/mpris/MediaPlayer2")
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return &spotifyDBusInterface{
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Conn: conn,
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BusObject: busObject,
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}, nil
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}
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type spotifyDBusInterface struct {
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Conn *dbus.Conn
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BusObject *dbus.Object
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}
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func (sdi *spotifyDBusInterface) GetPlaybackInfo() (SpotifyPlaybackInfo, error) {
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var spi SpotifyPlaybackInfo
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positionProp, err := sdi.BusObject.GetProperty("org.mpris.MediaPlayer2.Player.Position")
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if err != nil {
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return spi, fmt.Errorf("could not retrieve playback position status: %w", err)
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}
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if value, ok := positionProp.Value().(int64); ok {
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spi.Time = time.Duration(value) / time.Nanosecond
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}
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playbackStatusProp, err := sdi.BusObject.GetProperty("org.mpris.MediaPlayer2.Player.PlaybackStatus")
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if err != nil {
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return spi, fmt.Errorf("could not retrieve playback status: %w", err)
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}
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if value, ok := playbackStatusProp.Value().(string); ok && value == "Playing" {
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spi.IsPlaying = true
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}
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metadataProp, err := sdi.BusObject.GetProperty("org.mpris.MediaPlayer2.Player.Metadata")
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if err != nil {
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return spi, fmt.Errorf("could not retrieve metadata: %w", err)
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}
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if metadata, ok := metadataProp.Value().(map[string]dbus.Variant); ok {
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if v := getProperty("xesam:title", metadata); v != nil {
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spi.Title = v.(string)
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}
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if v := getProperty("xesam:album", metadata); v != nil {
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spi.Album = v.(string)
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}
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if v := getProperty("xesam:albumArtist", metadata); v != nil {
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spi.Artist = strings.Join(v.([]string), ", ")
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}
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if spi.Album == spi.Title {
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spi.Album = ""
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}
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if v := getProperty("mpris:length", metadata); v != nil {
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spi.Duration = time.Duration(v.(uint64)) / time.Nanosecond
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}
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}
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return spi, nil
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}
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func (sdi *spotifyDBusInterface) Close() error {
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return sdi.Conn.Close()
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}
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func getProperty(key string, metadata map[string]dbus.Variant) interface{} {
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if v, ok := metadata[key]; ok {
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return v.Value()
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}
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return nil
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}
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