New features

inputs/mpris/input.go

@@ -0,0 +1,149 @@
+package mpris
+
+import (
+	"fmt"
+	"log"
+	"strings"
+
+	"git.nemunai.re/nemunaire/hathoris/inputs"
+
+	"github.com/godbus/dbus/v5"
+	"github.com/leberKleber/go-mpris"
+)
+
+type MPRISClient struct {
+	Id   string
+	Name string
+	Path string
+}
+
+var KNOWN_CLIENTS = []MPRISClient{
+	MPRISClient{"shairport", "ShairportSync", "org.mpris.MediaPlayer2.ShairportSync."},
+	MPRISClient{"firefox", "Firefox", "org.mpris.MediaPlayer2.firefox."},
+}
+
+type MPRISInput struct {
+	player *mpris.Player
+	Name   string
+	Path   string
+}
+
+var dbusConn *dbus.Conn
+
+func init() {
+	var err error
+	dbusConn, err = dbus.ConnectSessionBus()
+	if err != nil {
+		dbusConn, err = dbus.ConnectSystemBus()
+		if err != nil {
+			log.Println("Unable to connect to DBus. MPRIS will be unavailable:", err.Error())
+			return
+		}
+	}
+
+	var s []string
+	err = dbusConn.BusObject().Call("org.freedesktop.DBus.ListNames", 0).Store(&s)
+	if err != nil {
+		log.Println("DBus unavailable:", err.Error())
+		return
+	}
+	log.Println("Available DBus entries:", strings.Join(s, ","))
+
+	for _, ss := range s {
+		for _, c := range KNOWN_CLIENTS {
+			if strings.HasPrefix(ss, c.Path) {
+				inputs.SoundInputs[c.Id] = &MPRISInput{
+					Name: c.Name,
+					Path: c.Path,
+				}
+			}
+		}
+	}
+}
+
+func (i *MPRISInput) getPlayer() (*mpris.Player, error) {
+	if i.player == nil {
+		var s []string
+		err := dbusConn.BusObject().Call("org.freedesktop.DBus.ListNames", 0).Store(&s)
+		if err != nil {
+			return nil, err
+		}
+
+		for _, ss := range s {
+			if strings.HasPrefix(ss, i.Path) {
+				player := mpris.NewPlayerWithConnection(ss, dbusConn)
+				if err != nil {
+					return nil, err
+				}
+				i.player = &player
+				break
+			}
+		}
+
+		if i.player == nil {
+			return nil, fmt.Errorf("Unable to find such dBus entry")
+		}
+	}
+
+	return i.player, nil
+}
+
+func (i *MPRISInput) GetName() string {
+	return i.Name
+}
+
+func (i *MPRISInput) IsActive() bool {
+	p, err := i.getPlayer()
+	if err != nil || p == nil {
+		log.Println(err)
+		return false
+	}
+
+	_, err = p.Metadata()
+	return err == nil
+}
+
+func (i *MPRISInput) CurrentlyPlaying() *string {
+	p, err := i.getPlayer()
+	if err != nil || p == nil {
+		log.Println(err)
+		return nil
+	}
+
+	meta, err := p.Metadata()
+	if err != nil {
+		log.Println(err)
+		return nil
+	}
+
+	var infos []string
+	if artists, err := meta.XESAMArtist(); err == nil {
+		for _, artist := range artists {
+			if artist != "" {
+				infos = append(infos, artist)
+			}
+		}
+	}
+	if title, err := meta.XESAMTitle(); err == nil && title != "" {
+		infos = append(infos, title)
+	}
+
+	ret := strings.Join(infos, " - ")
+	return &ret
+}
+
+func (i *MPRISInput) TogglePause() error {
+	p, err := i.getPlayer()
+	if err != nil {
+		return err
+	}
+
+	if ok, err := p.CanPause(); err != nil {
+		return err
+	} else if !ok {
+		return fmt.Errorf("The player doesn't support pause")
+	}
+
+	p.Pause()
+	return nil
+}