From 6d52da58d9337b786a0c869974daa91ce0e34a98 Mon Sep 17 00:00:00 2001
From: obscuren <geffobscura@gmail.com>
Date: Sat, 14 Jun 2014 15:44:13 +0200
Subject: [PATCH] Logging mechanism

---
 ethutil/config.go | 27 ++++++++++++++++++++++++++-
 peer.go           |  5 +++++
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/ethutil/config.go b/ethutil/config.go
index f935e8f75..90037df87 100644
--- a/ethutil/config.go
+++ b/ethutil/config.go
@@ -143,12 +143,17 @@ func NewLogger(flag LoggerType, level int) *Logger {
 	return &Logger{logSys: loggers, logLevel: level}
 }
 
+func (self *Logger) SetLevel(level int) {
+	self.logLevel = level
+}
+
 func (log *Logger) AddLogSystem(logger LogSystem) {
 	log.logSys = append(log.logSys, logger)
 }
 
 const (
-	LogLevelDebug = iota
+	LogLevelSystem = iota
+	LogLevelDebug
 	LogLevelInfo
 )
 
@@ -204,6 +209,26 @@ func (log *Logger) Fatal(v ...interface{}) {
 	os.Exit(1)
 }
 
+func (log *Logger) Println(level int, v ...interface{}) {
+	if log.logLevel > level {
+		return
+	}
+
+	for _, logger := range log.logSys {
+		logger.Println(v...)
+	}
+}
+
+func (log *Logger) Printf(level int, format string, v ...interface{}) {
+	if log.logLevel > level {
+		return
+	}
+
+	for _, logger := range log.logSys {
+		logger.Printf(format, v...)
+	}
+}
+
 type confValue struct {
 	value string
 }
diff --git a/peer.go b/peer.go
index 9da2ed002..56dd18c65 100644
--- a/peer.go
+++ b/peer.go
@@ -244,6 +244,8 @@ func (p *Peer) writeMessage(msg *ethwire.Msg) {
 		}
 	}
 
+	ethutil.Config.Log.Println(ethutil.LogLevelSystem, "<=", msg.Type, msg.Data)
+
 	err := ethwire.WriteMessage(p.conn, msg)
 	if err != nil {
 		ethutil.Config.Log.Debugln("[PEER] Can't send message:", err)
@@ -264,6 +266,7 @@ out:
 		select {
 		// Main message queue. All outbound messages are processed through here
 		case msg := <-p.outputQueue:
+
 			p.writeMessage(msg)
 			p.lastSend = time.Now()
 
@@ -316,6 +319,8 @@ func (p *Peer) HandleInbound() {
 			ethutil.Config.Log.Debugln(err)
 		}
 		for _, msg := range msgs {
+			ethutil.Config.Log.Println(ethutil.LogLevelSystem, "=>", msg.Type, msg.Data)
+
 			switch msg.Type {
 			case ethwire.MsgHandshakeTy:
 				// Version message