Fix emoji to slack shortcode logic for skin tone variations

emoji.go

@@ -38,12 +38,19 @@ func shortcodeToEmoji(code string) string {
 }
 
 func emojiToShortcode(emoji string) string {
-	for code, e := range emojis {
-		if emoji == e {
-			return code
+	var partCodes []string
+	for _, r := range emoji {
+		if r == '\ufe0f' { // ignore unicode variation selector
+			continue
+		}
+		for code, e := range emojis {
+			if string(r) == e {
+				partCodes = append(partCodes, code)
+				continue
+			}
 		}
 	}
-	return ""
+	return strings.Join(partCodes, "::")
 }
 
 func init() {

resources/EMOJI-LICENSE

@@ -1,23 +0,0 @@
-The file emoji.json is included from the project https://github.com/omnidan/node-emoji.
-
-The MIT License (MIT)
-
-Copyright (c) 2014 Daniel Bugl
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.

resources/update-emoji.json.py

@@ -0,0 +1,19 @@
+#!/usr/bin/python3
+import requests
+import json
+
+
+def unified_to_unicode(unified: str) -> str:
+    return (
+        "".join(rf"\U{chunk:0>8}" for chunk in unified.split("-"))
+        .encode("ascii")
+        .decode("unicode_escape")
+    )
+
+
+data = requests.get(
+    "https://raw.githubusercontent.com/iamcal/emoji-data/master/emoji.json"
+).json()
+emojis = {emoji["short_name"]: unified_to_unicode(emoji["unified"]) for emoji in data}
+with open("emoji.json", "w") as file:
+    json.dump(emojis, file, ensure_ascii=False)