add debug logging flag

barnard.go

@@ -2,6 +2,10 @@ package main
 
 import (
 	"crypto/tls"
+	"fmt"
+	"log"
+	"os"
+	"time"
 
 	"layeh.com/barnard/uiterm"
 	"layeh.com/gumble/gumble"
@@ -14,6 +18,10 @@ type Barnard struct {
 
 	Address   string
 	TLSConfig tls.Config
+	Debug     bool
+	Logger    *log.Logger
+	TreeWidth int
+	LogFile   *os.File
 
 	Stream *gumbleopenal.Stream
 
@@ -24,3 +32,16 @@ type Barnard struct {
 	UiTree        uiterm.Tree
 	UiInputStatus uiterm.Label
 }
+
+func (b *Barnard) debugf(format string, args ...interface{}) {
+	if b.Debug && b.Logger != nil {
+		b.Logger.Printf(format, args...)
+	}
+}
+
+func (b *Barnard) logMessage(line string) {
+	if b.LogFile != nil {
+		now := time.Now()
+		fmt.Fprintf(b.LogFile, "[%s] %s\n", now.Format("2006-01-02 15:04:05"), line)
+	}
+}

client.go

@@ -14,6 +14,7 @@ func (b *Barnard) start() {
 	b.Config.Attach(gumbleutil.AutoBitrate)
 	b.Config.Attach(b)
 
+	b.debugf("dialing %s", b.Address)
 	var err error
 	_, err = gumble.DialWithDialer(new(net.Dialer), b.Address, b.Config, &b.TLSConfig)
 	if err != nil {
@@ -25,6 +26,7 @@ func (b *Barnard) start() {
 	if os.Getenv("ALSOFT_LOGLEVEL") == "" {
 		os.Setenv("ALSOFT_LOGLEVEL", "0")
 	}
+	b.debugf("initializing audio stream")
 	if stream, err := gumbleopenal.New(b.Client); err != nil {
 		fmt.Fprintf(os.Stderr, "%s\n", err)
 		os.Exit(1)
@@ -35,6 +37,7 @@ func (b *Barnard) start() {
 
 func (b *Barnard) OnConnect(e *gumble.ConnectEvent) {
 	b.Client = e.Client
+	b.debugf("connected to %s", b.Client.Conn.RemoteAddr())
 
 	b.Ui.SetActive(uiViewInput)
 	b.UiTree.Rebuild()
@@ -48,6 +51,7 @@ func (b *Barnard) OnConnect(e *gumble.ConnectEvent) {
 }
 
 func (b *Barnard) OnDisconnect(e *gumble.DisconnectEvent) {
+	b.debugf("disconnected (type=%d)", e.Type)
 	var reason string
 	switch e.Type {
 	case gumble.DisconnectError:
@@ -63,10 +67,14 @@ func (b *Barnard) OnDisconnect(e *gumble.DisconnectEvent) {
 }
 
 func (b *Barnard) OnTextMessage(e *gumble.TextMessageEvent) {
+	if e.Sender != nil {
+		b.debugf("message from %s (%d bytes)", e.Sender.Name, len(e.Message))
+	}
 	b.AddOutputMessage(e.Sender, e.Message)
 }
 
 func (b *Barnard) OnUserChange(e *gumble.UserChangeEvent) {
+	b.debugf("user change: %s (type=%d)", e.User.Name, e.Type)
 	if e.Type.Has(gumble.UserChangeChannel) && e.User == b.Client.Self {
 		b.UpdateInputStatus(fmt.Sprintf("To: %s", e.User.Channel.Name))
 	}
@@ -80,6 +88,7 @@ func (b *Barnard) OnChannelChange(e *gumble.ChannelChangeEvent) {
 }
 
 func (b *Barnard) OnPermissionDenied(e *gumble.PermissionDeniedEvent) {
+	b.debugf("permission denied (type=%d)", e.Type)
 	var info string
 	switch e.Type {
 	case gumble.PermissionDeniedOther:

main.go

@@ -4,6 +4,7 @@ import (
 	"crypto/tls"
 	"flag"
 	"fmt"
+	"log"
 	"net"
 	"os"
 
@@ -23,6 +24,9 @@ func main() {
 	passwordPrompt := flag.Bool("password-prompt", false, "prompt for server password on stdin")
 	insecure := flag.Bool("insecure", false, "skip server certificate verification")
 	certificate := flag.String("certificate", "", "PEM encoded certificate and private key")
+	debug := flag.Bool("debug", false, "enable debug logging to stderr")
+	treeWidth := flag.Int("tree-width", 20, "width of the channel tree pane")
+	logFile := flag.String("log", "", "write chat messages to file")
 
 	flag.Parse()
 
@@ -56,6 +60,21 @@ func main() {
 
 	b.Config.Username = *username
 	b.Config.Password = pass
+	b.TreeWidth = *treeWidth
+	b.Debug = *debug
+	if b.Debug {
+		b.Logger = log.New(os.Stderr, "barnard: ", log.Ltime)
+		b.debugf("connecting to %s as %q", addr, *username)
+	}
+	if *logFile != "" {
+		f, err := os.OpenFile(*logFile, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0600)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "%s\n", err)
+			os.Exit(1)
+		}
+		defer f.Close()
+		b.LogFile = f
+	}
 
 	if *insecure {
 		b.TLSConfig.InsecureSkipVerify = true