196 lines
3.4 KiB
Go
196 lines
3.4 KiB
Go
package logging
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import (
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"fmt"
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"io"
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"log"
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"os"
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)
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// Setup sets up/configures a FileLogger and prepares it for use.
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func (l *FileLogger) Setup() {
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var err error
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l.Logger = log.Default()
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l.Logger.SetPrefix(l.Prefix)
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if l.writer, err = os.OpenFile(l.Path, appendFlags, logPerm); err != nil {
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log.Panicf("could not open log file \"%v\" for writing: %v\n", l.Path, err)
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}
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// https://stackoverflow.com/a/36719588/733214
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multi := io.MultiWriter(os.Stdout, l.writer)
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l.Logger.SetOutput(multi)
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}
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// Shutdown cleanly shuts down a FileLogger.
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func (l *FileLogger) Shutdown() {
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var err error
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if err = l.writer.Close(); err != nil {
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log.Panicf("could not close log file \"%v\": %v\n", l.Path, err)
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}
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}
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// GetPrefix returns the prefix used by this FileLogger.
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func (l *FileLogger) GetPrefix() string {
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return l.Prefix
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}
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/*
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DoDebug sets the debug state of this FileLogger.
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Note that this merely acts as a *safety filter* for debug messages to avoid sensitive information being written to the log.
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*/
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func (l *FileLogger) DoDebug(d bool) {
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l.EnableDebug = d
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}
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// SetPrefix sets the prefix for this FileLogger.
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func (l *FileLogger) SetPrefix(prefix string) {
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l.Prefix = prefix
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l.Logger.SetPrefix(prefix)
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}
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// Alert writes an ALERT-level message to this FileLogger.
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func (l *FileLogger) Alert(s string, v ...interface{}) (err error) {
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var msg string
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if v != nil {
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msg = fmt.Sprintf(s, v...)
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} else {
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msg = s
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}
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l.renderWrite(msg, "ALERT")
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return
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}
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// Crit writes an CRITICAL-level message to this FileLogger.
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func (l *FileLogger) Crit(s string, v ...interface{}) (err error) {
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var msg string
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if v != nil {
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msg = fmt.Sprintf(s, v...)
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} else {
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msg = s
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}
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l.renderWrite(msg, "CRITICAL")
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return
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}
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// Debug writes a DEBUG-level message to this FileLogger.
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func (l *FileLogger) Debug(s string, v ...interface{}) (err error) {
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if !l.EnableDebug {
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return
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}
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var msg string
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if v != nil {
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msg = fmt.Sprintf(s, v...)
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} else {
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msg = s
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}
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l.renderWrite(msg, "DEBUG")
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return
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}
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// Emerg writes an EMERGENCY-level message to this FileLogger.
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func (l *FileLogger) Emerg(s string, v ...interface{}) (err error) {
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var msg string
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if v != nil {
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msg = fmt.Sprintf(s, v...)
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} else {
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msg = s
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}
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l.renderWrite(msg, "EMERGENCY")
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return
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}
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// Err writes an ERROR-level message to this FileLogger.
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func (l *FileLogger) Err(s string, v ...interface{}) (err error) {
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var msg string
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if v != nil {
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msg = fmt.Sprintf(s, v...)
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} else {
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msg = s
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}
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l.renderWrite(msg, "ERROR")
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return
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}
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// Info writes an INFO-level message to this FileLogger.
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func (l *FileLogger) Info(s string, v ...interface{}) (err error) {
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var msg string
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if v != nil {
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msg = fmt.Sprintf(s, v...)
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} else {
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msg = s
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}
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l.renderWrite(msg, "INFO")
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return
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}
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// Notice writes a NOTICE-level message to this FileLogger.
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func (l *FileLogger) Notice(s string, v ...interface{}) (err error) {
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var msg string
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if v != nil {
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msg = fmt.Sprintf(s, v...)
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} else {
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msg = s
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}
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l.renderWrite(msg, "NOTICE")
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return
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}
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// Warning writes a WARNING/WARN-level message to this FileLogger.
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func (l *FileLogger) Warning(s string, v ...interface{}) (err error) {
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var msg string
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if v != nil {
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msg = fmt.Sprintf(s, v...)
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} else {
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msg = s
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}
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l.renderWrite(msg, "WARNING")
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return
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}
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// renderWrite prepares/formats a log message to be written to this FileLogger.
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func (l *FileLogger) renderWrite(msg, prio string) {
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s := fmt.Sprintf("[%v] %v", prio, msg)
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l.Logger.Println(s)
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return
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}
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