86 lines
1.8 KiB
Go
86 lines
1.8 KiB
Go
package logger
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import (
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"fmt"
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"io"
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"os"
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)
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const (
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NC = "\033[0m"
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red = "\033[0;31m"
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yellow = "\033[0;33m"
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)
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const (
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errorPrefix = "Error: "
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fatalPrefix = "Fatal: "
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warningprefix = "Warning: "
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)
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type SimpleLogger struct {
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enableColour bool
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}
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func (sl *SimpleLogger) printMsg(msg string, dest io.Writer) {
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if msg[len(msg)-1:] != "\n" {
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msg = msg + "\n"
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}
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n, err := fmt.Fprint(dest, msg)
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if err != nil {
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panic(fmt.Errorf("failed to write message to %v: %w", dest, err))
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}
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if n != len(msg) {
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panic(fmt.Errorf("failed to write the entire message (%d/%d)", n, len(msg)))
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}
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}
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func (sl *SimpleLogger) colourText(msg string, colour string) string {
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if !sl.enableColour {
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return msg
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}
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return colour + msg + NC
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}
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func (sl *SimpleLogger) Info(msg string) {
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sl.printMsg(msg, os.Stdout)
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}
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func (sl *SimpleLogger) Infof(format string, a ...any) {
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sl.printMsg(fmt.Sprintf(format, a...), os.Stdout)
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}
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func (sl *SimpleLogger) Error(msg string) {
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sl.printMsg(sl.colourText(errorPrefix+msg, red), os.Stderr)
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}
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func (sl *SimpleLogger) Errorf(format string, a ...any) {
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sl.printMsg(sl.colourText(errorPrefix+fmt.Sprintf(format, a...), red), os.Stderr)
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}
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func (sl *SimpleLogger) Warning(msg string) {
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sl.printMsg(sl.colourText(warningprefix+msg, yellow), os.Stdout)
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}
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func (sl *SimpleLogger) Warningf(format string, a ...any) {
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sl.printMsg(sl.colourText(warningprefix+fmt.Sprintf(format, a...), yellow), os.Stdout)
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}
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func (sl *SimpleLogger) Fatal(msg string) {
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sl.printMsg(sl.colourText(fatalPrefix+msg, red), os.Stderr)
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os.Exit(1)
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}
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func (sl *SimpleLogger) Fatalf(format string, a ...any) {
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sl.printMsg(sl.colourText(fatalPrefix+fmt.Sprintf(format, a...), red), os.Stderr)
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os.Exit(1)
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}
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func WithColour() *SimpleLogger {
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return &SimpleLogger{enableColour: true}
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}
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func NoColour() *SimpleLogger {
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return &SimpleLogger{enableColour: false}
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}
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