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