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)
+	}
+}