Added timeformat, verbose and overriding of log format function

slog.go

@@ -3,8 +3,28 @@ package slog
 import (
 	"fmt"
 	"io"
+	"runtime"
+	"time"
 )
 
+type SLogFormatFct func(level SLogLevel, verbose bool, timeformat string, format string, a ...interface{}) string
+
+func defaultSLogFormatFct(level SLogLevel, verbose bool, timeformat string, format string, a ...interface{}) string {
+	msg := fmt.Sprintf("[%s] - ", SLogLevelToString(level))
+	if timeformat != "" {
+		t := time.Now()
+		msg = fmt.Sprintf("%s - %s", t.Format(timeformat), msg)
+	}
+	if verbose {
+		if fct, file, line, ok := runtime.Caller(3); ok {
+			msg = msg + fmt.Sprintf("{File: %s, Line: %d, Function: %s} - ", file, line, runtime.FuncForPC(fct).Name())
+		}
+	}
+
+	msg = fmt.Sprintf(msg+format, a...)
+	return msg
+}
+
 type SLogLevel int
 
 const (
@@ -29,68 +49,113 @@ func GetSLogLevel(level string) SLogLevel {
 	}
 }
 
+func SLogLevelToString(level SLogLevel) string {
+	switch level {
+	case ERROR:
+		return "ERROR"
+	case WARN:
+		return "WARN"
+	case INFO:
+		return "INFO"
+	case DEBUG:
+		return "DEBUG"
+	default:
+		return "ERROR"
+	}
+}
+
 type SLogger struct {
-	level   SLogLevel
-	loggers []io.Writer
+	level      SLogLevel
+	verbose    bool
+	formatfct  SLogFormatFct
+	timeformat string
+	loggers    []io.Writer
 }
 
 func NewSLogger() (ret *SLogger) {
 	ret = &SLogger{}
 	ret.level = ERROR
+	ret.verbose = false
+	ret.timeformat = "2006-01-02 15:04:05 MST"
+	ret.formatfct = defaultSLogFormatFct
 	ret.loggers = []io.Writer{NewStdoutLogger()}
 
 	return ret
 }
 
-var DefaultSLog = NewSLogger()
+var defaultSLog = NewSLogger()
 
-func (sl *SLogger) Log(level SLogLevel, format string, a ...interface{}) {
+func (sl *SLogger) log(level SLogLevel, format string, a ...interface{}) {
 	if level > sl.level {
 		return
 	}
+	msg := sl.formatfct(level, sl.verbose, sl.timeformat, format, a...)
 
 	for _, l := range sl.loggers {
-		msg := fmt.Sprintf(format, a...)
 		l.Write([]byte(msg))
 	}
 }
 
 func LOG_ERROR(format string, a ...interface{}) {
-	DefaultSLog.Log(ERROR, "[ERROR] - "+format, a...)
+	defaultSLog.log(ERROR, format, a...)
 }
 
 func LOG_WARN(format string, a ...interface{}) {
-	DefaultSLog.Log(WARN, "[WARN] - "+format, a...)
+	defaultSLog.log(WARN, format, a...)
 }
 
 func LOG_INFO(format string, a ...interface{}) {
-	DefaultSLog.Log(INFO, "[INFO] - "+format, a...)
+	defaultSLog.log(INFO, format, a...)
 }
 
 func LOG_DEBUG(format string, a ...interface{}) {
-	DefaultSLog.Log(DEBUG, "[DEBUG] - "+format, a...)
+	defaultSLog.log(DEBUG, format, a...)
 }
 
 func SET_LEVEL(level SLogLevel) {
-	DefaultSLog.SetLevel(level)
+	defaultSLog.SetLevel(level)
+}
+
+func SET_FORMAT(fct SLogFormatFct) {
+	defaultSLog.SetFormat(fct)
+}
+
+func SET_VERBOSE(verbose bool) {
+	defaultSLog.SetVerbose(verbose)
+}
+
+func SET_TIMEFORMAT(timeformat string) {
+	defaultSLog.SetTimeFormat(timeformat)
 }
 
 func ADD_LOGGER(logger io.Writer) {
-	DefaultSLog.AddLogger(logger)
+	defaultSLog.AddLogger(logger)
 }
 
 func SET_LOGGERS(loggers []io.Writer) {
-	DefaultSLog.SetLoggers(loggers)
+	defaultSLog.SetLoggers(loggers)
 }
 
 func CLEAR_LOGGERS() {
-	DefaultSLog.ClearLoggers()
+	defaultSLog.ClearLoggers()
 }
 
 func (sl *SLogger) SetLevel(level SLogLevel) {
 	sl.level = level
 }
 
+func (sl *SLogger) SetVerbose(verbose bool) {
+	sl.verbose = verbose
+}
+
+func (sl *SLogger) SetFormat(fct SLogFormatFct) {
+	sl.formatfct = fct
+}
+
+func (sl *SLogger) SetTimeFormat(format string) {
+	sl.timeformat = format
+}
+
 func (sl *SLogger) AddLogger(logger io.Writer) {
 	sl.loggers = append(sl.loggers, logger)
 }