86 lines
1.5 KiB
Go
86 lines
1.5 KiB
Go
package utils
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import (
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"io"
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"log"
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)
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var NullLogger Logger = &NOPLogger{}
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// Logger defines a simple logging interface
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type Logger interface {
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Infof(format string, args ...interface{})
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Warningf(format string, args ...interface{})
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Errorf(format string, args ...interface{})
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}
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type FileLogger struct {
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info *log.Logger
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warn *log.Logger
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error *log.Logger
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}
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func NewFileLogger(w io.Writer, lvl LogLevel) *FileLogger {
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l := &FileLogger{}
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flag := log.Ldate | log.Ltime | log.Lmicroseconds
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if lvl <= INFO {
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l.info = log.New(w, "INFO: ", flag)
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}
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if lvl <= WARN {
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l.warn = log.New(w, "WARN: ", flag)
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}
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if lvl <= ERROR {
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l.error = log.New(w, "ERR: ", flag)
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}
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return l
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}
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func (f *FileLogger) Infof(format string, args ...interface{}) {
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if f.info == nil {
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return
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}
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f.info.Printf(format, args...)
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}
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func (f *FileLogger) Warningf(format string, args ...interface{}) {
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if f.warn == nil {
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return
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}
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f.warn.Printf(format, args...)
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}
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func (f *FileLogger) Errorf(format string, args ...interface{}) {
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if f.error == nil {
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return
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}
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f.error.Printf(format, args...)
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}
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type NOPLogger struct {
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}
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func (*NOPLogger) Infof(format string, args ...interface{}) {
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}
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func (*NOPLogger) Warningf(format string, args ...interface{}) {
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}
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func (*NOPLogger) Errorf(format string, args ...interface{}) {
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}
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func (*NOPLogger) Info(string) {
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}
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func (*NOPLogger) Warning(string) {
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}
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func (*NOPLogger) Error(string) {
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}
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type LogLevel int
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const (
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INFO = iota
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WARN
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ERROR
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)
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