convert receive sms from kannel to utf8 with emoji

kannel.go

package main

import (
	"fmt"
	"net/url"
	"strings"
	"unicode/utf16"
)

func main() {
	encodedString := "%06*%063%06*%D8%3D%DE%06%D8%3E%DDy%D8%3D%DE%0E"
	decodedBytes, err := url.QueryUnescape(encodedString)
	if err != nil {
		fmt.Println("Error decoding:", err)
		return
	}

	// Remove non-percent-encoded bytes
	decodedString := strings.Join(strings.Split(string(decodedBytes), "\\"), "")

	var utf16Bytes []uint16
	for i := 0; i < len(decodedString); i += 2 {
		if i+1 < len(decodedString) {
			r := rune(uint16(decodedString[i])<<8 | uint16(decodedString[i+1]))
			if !utf16.IsSurrogate(r) {
				utf16Bytes = append(utf16Bytes, uint16(r))
			} else {
				utf16Bytes = append(utf16Bytes, uint16(decodedBytes[i])<<8|uint16(decodedBytes[i+1]))
			}
		}
	}

	decodedString = string(utf16.Decode(utf16Bytes))
	fmt.Println(decodedString)
}