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// Package emoji terminal output.
package emoji
import (
"bytes"
"errors"
"fmt"
"io"
"regexp"
"unicode"
)
//go:generate generateEmojiCodeMap -pkg emoji
// Replace Padding character for emoji.
const (
ReplacePadding = " "
)
// CodeMap gets the underlying map of emoji.
func CodeMap() map[string]string {
return emojiCodeMap
}
// regular expression that matches :flag-[countrycode]:
var flagRegexp = regexp.MustCompile(":flag-([a-z]{2}):")
func emojize(x string) string {
str, ok := emojiCodeMap[x]
if ok {
return str + ReplacePadding
}
if match := flagRegexp.FindStringSubmatch(x); len(match) == 2 {
return regionalIndicator(match[1][0]) + regionalIndicator(match[1][1])
}
return x
}
// regionalIndicator maps a lowercase letter to a unicode regional indicator
func regionalIndicator(i byte) string {
return string('\U0001F1E6' + rune(i) - 'a')
}
func replaseEmoji(input *bytes.Buffer) string {
emoji := bytes.NewBufferString(":")
for {
i, _, err := input.ReadRune()
if err != nil {
// not replase
return emoji.String()
}
if i == ':' && emoji.Len() == 1 {
return emoji.String() + replaseEmoji(input)
}
emoji.WriteRune(i)
switch {
case unicode.IsSpace(i):
return emoji.String()
case i == ':':
return emojize(emoji.String())
}
}
}
func compile(x string) string {
if x == "" {
return ""
}
input := bytes.NewBufferString(x)
output := bytes.NewBufferString("")
for {
i, _, err := input.ReadRune()
if err != nil {
break
}
switch i {
default:
output.WriteRune(i)
case ':':
output.WriteString(replaseEmoji(input))
}
}
return output.String()
}
func compileValues(a *[]interface{}) {
for i, x := range *a {
if str, ok := x.(string); ok {
(*a)[i] = compile(str)
}
}
}
// Print is fmt.Print which supports emoji
func Print(a ...interface{}) (int, error) {
compileValues(&a)
return fmt.Print(a...)
}
// Println is fmt.Println which supports emoji
func Println(a ...interface{}) (int, error) {
compileValues(&a)
return fmt.Println(a...)
}
// Printf is fmt.Printf which supports emoji
func Printf(format string, a ...interface{}) (int, error) {
format = compile(format)
compileValues(&a)
return fmt.Printf(format, a...)
}
// Fprint is fmt.Fprint which supports emoji
func Fprint(w io.Writer, a ...interface{}) (int, error) {
compileValues(&a)
return fmt.Fprint(w, a...)
}
// Fprintln is fmt.Fprintln which supports emoji
func Fprintln(w io.Writer, a ...interface{}) (int, error) {
compileValues(&a)
return fmt.Fprintln(w, a...)
}
// Fprintf is fmt.Fprintf which supports emoji
func Fprintf(w io.Writer, format string, a ...interface{}) (int, error) {
format = compile(format)
compileValues(&a)
return fmt.Fprintf(w, format, a...)
}
// Sprint is fmt.Sprint which supports emoji
func Sprint(a ...interface{}) string {
compileValues(&a)
return fmt.Sprint(a...)
}
// Sprintf is fmt.Sprintf which supports emoji
func Sprintf(format string, a ...interface{}) string {
format = compile(format)
compileValues(&a)
return fmt.Sprintf(format, a...)
}
// Errorf is fmt.Errorf which supports emoji
func Errorf(format string, a ...interface{}) error {
compileValues(&a)
return errors.New(Sprintf(format, a...))
}
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