⚡ Improve searching stickers via fixing emoji runes

Fixed #1

helpers.go

@@ -3,8 +3,23 @@ package main
 import (
 	"github.com/nicksnyder/go-i18n/i18n"
 	tg "github.com/toby3d/telegram"
+	"golang.org/x/text/runes"
+	"golang.org/x/text/transform"
 )
 
+var bannedSkins = []rune{127995, 127996, 127997, 127998, 127999}
+
+var skinRemover = runes.Remove(runes.Predicate(
+	func(r rune) bool {
+		for _, skin := range bannedSkins {
+			if r == skin {
+				return true
+			}
+		}
+		return false
+	},
+))
+
 func getMenuKeyboard(T i18n.TranslateFunc) *tg.ReplyKeyboardMarkup {
 	return tg.NewReplyKeyboardMarkup(
 		tg.NewReplyKeyboardRow(
@@ -28,3 +43,8 @@ func getCancelButton(T i18n.TranslateFunc) *tg.ReplyKeyboardMarkup {
 		),
 	)
 }
+
+func fixEmoji(raw string) (string, error) {
+	result, _, err := transform.String(skinRemover, raw)
+	return result, err
+}

update_inline_query.go

@@ -8,6 +8,11 @@ import (
 )
 
 func updateInlineQuery(inlineQuery *tg.InlineQuery) {
+	fixedQuery, err := fixEmoji(inlineQuery.Query)
+	if err == nil {
+		inlineQuery.Query = fixedQuery
+	}
+
 	answer := &tg.AnswerInlineQueryParameters{}
 	answer.InlineQueryID = inlineQuery.ID
 	answer.CacheTime = 1