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Copy pathlogger.go
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98 lines (80 loc) · 2.13 KB
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// Copyright 2017 Frédéric Guillot. All rights reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.
package logger // import "miniflux.app/logger"
import (
"fmt"
"os"
"time"
)
var requestedLevel = InfoLevel
var displayDateTime = false
// LogLevel type.
type LogLevel uint32
const (
// FatalLevel should be used in fatal situations, the app will exit.
FatalLevel LogLevel = iota
// ErrorLevel should be used when someone should really look at the error.
ErrorLevel
// InfoLevel should be used during normal operations.
InfoLevel
// DebugLevel should be used only during development.
DebugLevel
)
func (level LogLevel) String() string {
switch level {
case DebugLevel:
return "DEBUG"
case InfoLevel:
return "INFO"
case ErrorLevel:
return "ERROR"
case FatalLevel:
return "FATAL"
default:
return "UNKNOWN"
}
}
// EnableDateTime enables date time in log messages.
func EnableDateTime() {
displayDateTime = true
}
// EnableDebug increases logging, more verbose (debug)
func EnableDebug() {
requestedLevel = DebugLevel
formatMessage(InfoLevel, "Debug mode enabled")
}
// Debug sends a debug log message.
func Debug(format string, v ...interface{}) {
if requestedLevel >= DebugLevel {
formatMessage(DebugLevel, format, v...)
}
}
// Info sends an info log message.
func Info(format string, v ...interface{}) {
if requestedLevel >= InfoLevel {
formatMessage(InfoLevel, format, v...)
}
}
// Error sends an error log message.
func Error(format string, v ...interface{}) {
if requestedLevel >= ErrorLevel {
formatMessage(ErrorLevel, format, v...)
}
}
// Fatal sends a fatal log message and stop the execution of the program.
func Fatal(format string, v ...interface{}) {
if requestedLevel >= FatalLevel {
formatMessage(FatalLevel, format, v...)
os.Exit(1)
}
}
func formatMessage(level LogLevel, format string, v ...interface{}) {
var prefix string
if displayDateTime {
prefix = fmt.Sprintf("[%s] [%s] ", time.Now().Format("2006-01-02T15:04:05"), level)
} else {
prefix = fmt.Sprintf("[%s] ", level)
}
fmt.Fprintf(os.Stderr, prefix+format+"\n", v...)
}