feat: add Jira integration (#52)

logger.go

@@ -0,0 +1,59 @@
+package chglog
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"regexp"
+
+	"github.com/fatih/color"
+	emoji "github.com/kyokomi/emoji/v2"
+)
+
+// Logger ...
+type Logger struct {
+	stdout  io.Writer
+	stderr  io.Writer
+	silent  bool
+	noEmoji bool
+	reEmoji *regexp.Regexp
+}
+
+// NewLogger ...
+func NewLogger(stdout, stderr io.Writer, silent, noEmoji bool) *Logger {
+	return &Logger{
+		stdout:  stdout,
+		stderr:  stderr,
+		silent:  silent,
+		noEmoji: noEmoji,
+		reEmoji: regexp.MustCompile(":[\\w\\+_\\-]+:\\s?"),
+	}
+}
+
+// Log ...
+func (l *Logger) Log(msg string) {
+	if !l.silent {
+		l.log(l.stdout, msg+"\n")
+	}
+}
+
+// Error ...
+func (l *Logger) Error(msg string) {
+	prefix := color.New(color.FgWhite, color.BgRed, color.Bold).SprintFunc()
+	l.log(l.stderr, fmt.Sprintf("%s %s\n", prefix(" ERROR "), color.RedString(msg)))
+}
+
+func (l *Logger) log(w io.Writer, msg string) {
+	var printer func(io.Writer, ...interface{}) (int, error)
+
+	if l.noEmoji {
+		msg = l.reEmoji.ReplaceAllString(msg, "")
+		printer = fmt.Fprint
+	} else {
+		printer = emoji.Fprint
+	}
+
+	if _, err := printer(w, msg); err != nil {
+		log.Fatalln(err)
+	}
+}