diff options
Diffstat (limited to 'main.go')
| -rw-r--r-- | main.go | 183 |
1 files changed, 126 insertions, 57 deletions
@@ -40,6 +40,41 @@ var ( WRITER io.Writer = os.Stdout ) +const ( + cPlayerNext = "pn" + cPlayerPrev = "pp" + cNext = "mn" + cPrev = "mp" + cToggle = "mt" + cList = "ls" + cShare = "sh" + cPreShare = "ps" + rSuccess = "sc" + rInvalidCommand = "iv" +) + +func stringToCmd(str string) string { + switch str { + case "player-next": + return cPlayerNext + case "player-prev": + return cPlayerPrev + case "next": + return cNext + case "prev": + return cPrev + case "toggle": + return cToggle + case "list": + return cList + case "share": + return cShare + case "pre-share": + return cPreShare + } + return "" +} + // JSON returns json for waybar to consume. func playerJSON(p *mpris2.Player) string { symbol := PLAY @@ -140,7 +175,8 @@ func execCommand(cmd string) { if err != nil { log.Fatalln("Couldn't dial:", err) } - _, err = conn.Write([]byte(cmd)) + shortCmd := stringToCmd(cmd) + _, err = conn.Write([]byte(shortCmd)) if err != nil { log.Fatalln("Couldn't send command") } @@ -158,69 +194,96 @@ func execCommand(cmd string) { os.Exit(0) } -func duplicateOutput(conn net.Conn) { +func duplicateOutput() error { // Print to stderr to avoid errors from waybar os.Stderr.WriteString("waybar-mpris is already running. This instance will clone its output.") - // Tell other instance to share output in OUTFILE - _, err := conn.Write([]byte("share")) + + conn, err := net.Dial("unix", SOCK) + if err != nil { + return err + } + _, err = conn.Write([]byte(cPreShare)) if err != nil { log.Fatalf("Couldn't send command: %v", err) + return err } buf := make([]byte, 512) nr, err := conn.Read(buf) if err != nil { log.Fatalf("Couldn't read response: %v", err) + return err } - if resp := string(buf[0:nr]); resp == "success" { - // t, err := tail.TailFile(OUTFILE, tail.Config{ - // Follow: true, - // MustExist: true, - // Logger: tail.DiscardingLogger, - // }) - // if err == nil { - // for line := range t.Lines { - // fmt.Println(line.Text) - // } - // } - f, err := os.Open(OUTFILE) + argString := "" + for _, arg := range os.Args { + argString += arg + "|" + } + if string(buf[0:nr]) == argString { + conn.Close() + conn, err = net.Dial("unix", SOCK) if err != nil { - log.Fatalf("Failed to open \"%s\": %v", OUTFILE, err) + return err } - watcher, err := fsnotify.NewWatcher() + // Tell other instance to share output in OUTFILE + _, err := conn.Write([]byte(cShare)) if err != nil { - log.Fatalf("Failed to start watcher: %v", err) + log.Fatalf("Couldn't send command: %v", err) } - defer watcher.Close() - err = watcher.Add(OUTFILE) + buf := make([]byte, 2) + nr, err := conn.Read(buf) if err != nil { - log.Fatalf("Failed to watch file: %v", err) + log.Fatalf("Couldn't read response: %v", err) } - for { - select { - case event, ok := <-watcher.Events: - if !ok { - log.Printf("Watcher failed: %v", err) - return - } - if event.Op&fsnotify.Write == fsnotify.Write { - l, err := io.ReadAll(f) - if err != nil { - log.Printf("Failed to read file: %v", err) - return + if resp := string(buf[0:nr]); resp == rSuccess { + // t, err := tail.TailFile(OUTFILE, tail.Config{ + // Follow: true, + // MustExist: true, + // Logger: tail.DiscardingLogger, + // }) + // if err == nil { + // for line := range t.Lines { + // fmt.Println(line.Text) + // } + // } + f, err := os.Open(OUTFILE) + if err != nil { + log.Fatalf("Failed to open \"%s\": %v", OUTFILE, err) + } + watcher, err := fsnotify.NewWatcher() + if err != nil { + log.Fatalf("Failed to start watcher: %v", err) + } + defer watcher.Close() + err = watcher.Add(OUTFILE) + if err != nil { + log.Fatalf("Failed to watch file: %v", err) + } + for { + select { + case event, ok := <-watcher.Events: + if !ok { + log.Printf("Watcher failed: %v", err) + return err } - str := string(l) - // Trim extra newline is necessary - if str[len(str)-2:] == "\n\n" { - fmt.Print(str[:len(str)-1]) - } else { - fmt.Print(str) + if event.Op&fsnotify.Write == fsnotify.Write { + l, err := io.ReadAll(f) + if err != nil { + log.Printf("Failed to read file: %v", err) + return err + } + str := string(l) + // Trim extra newline is necessary + if str[len(str)-2:] == "\n\n" { + fmt.Print(str[:len(str)-1]) + } else { + fmt.Print(str) + } + f.Seek(0, 0) } - f.Seek(0, 0) } } } } - + return nil } func listenForCommands(players *players) { @@ -246,7 +309,7 @@ func listenForCommands(players *players) { log.Println("Couldn't accept:", err) continue } - buf := make([]byte, 512) + buf := make([]byte, 2) nr, err := con.Read(buf) if err != nil { log.Println("Couldn't read:", err) @@ -254,7 +317,7 @@ func listenForCommands(players *players) { } command := string(buf[0:nr]) switch command { - case "player-next": + case cPlayerNext: length := len(players.mpris2.List) if length != 1 { if players.mpris2.Current < uint(length-1) { @@ -264,7 +327,7 @@ func listenForCommands(players *players) { } players.mpris2.Refresh() } - case "player-prev": + case cPlayerPrev: length := len(players.mpris2.List) if length != 1 { if players.mpris2.Current != 0 { @@ -274,15 +337,15 @@ func listenForCommands(players *players) { } players.mpris2.Refresh() } - case "next": + case cNext: players.Next() - case "prev": + case cPrev: players.Prev() - case "toggle": + case cToggle: players.Toggle() - case "list": + case cList: con.Write([]byte(players.mpris2.String())) - case "share": + case cShare: if !isSharing { f, err := os.OpenFile(OUTFILE, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0666) defer f.Close() @@ -293,10 +356,20 @@ func listenForCommands(players *players) { WRITER = io.MultiWriter(os.Stdout, out) isSharing = true } - fmt.Fprint(con, "success") + fmt.Fprint(con, rSuccess) + /* Prior to sharing, the first instance sends its os.Args. + If the second instances args are different, the first sends the raw data (artist, album, etc.) + If they are the same, the first instance just sends its output and the second prints it. */ + case cPreShare: + out := "" + for _, arg := range os.Args { + out += arg + "|" + } + con.Write([]byte(out)) default: fmt.Println("Invalid command") } + con.Close() } } @@ -356,13 +429,9 @@ func main() { ignoreChoice = true // os.Remove(SOCK) } - } else if conn, err := net.Dial("unix", SOCK); err == nil { // When waybar-mpris is already running, we attach to its output instead of launching a whole new instance. - duplicateOutput(conn) - } else { - if err != nil { - os.Stdout.WriteString("Couldn't dial socket, deleting instead: " + err.Error()) - } + } else if err := duplicateOutput(); err != nil { + os.Stdout.WriteString("Couldn't dial socket, deleting instead: " + err.Error()) os.Remove(SOCK) os.Remove(OUTFILE) } |