From f0d758ab5f82c408589c28fc965d3233cb1bc624 Mon Sep 17 00:00:00 2001
From: Vincent Batts <vbatts@hashbangbash.com>
Date: Mon, 22 Oct 2018 15:19:50 +0100
Subject: [PATCH] emoji: adding a helper to parse a hex string into codepoint

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
---
 emoji/map.go | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/emoji/map.go b/emoji/map.go
index 10a304c..2681489 100644
--- a/emoji/map.go
+++ b/emoji/map.go
@@ -1,6 +1,7 @@
 package emoji
 
 import (
+	"encoding/hex"
 	"fmt"
 	"strconv"
 	"strings"
@@ -72,3 +73,24 @@ func CodepointToUnicode(word string) string {
 	}
 	return ret
 }
+
+// FromHexString parses string s as two character byte of hexadecimal into
+// Unicode Codepoint
+func FromHexString(s string) (string, error) {
+	d, err := hex.DecodeString(s)
+	if err != nil {
+		return "", err
+	}
+
+	var ret string
+	for _, b := range d {
+		for _, e := range Map(b) {
+			// use the first colon notation word and continue
+			if IsCodepoint(e) {
+				ret = ret + CodepointToUnicode(e)
+				break
+			}
+		}
+	}
+	return ret, nil
+}