Fix Emoji support for notes in Craft 4.4+

src/helpers/StringHelper.php

@@ -10,20 +10,39 @@ class StringHelper extends CraftStringHelper
     // Static Methods
     // =========================================================================
 
-    public static function sanitizeNotes($value): ?string
+    public static function sanitizeNotes(?string $value): ?string
     {
         // Support Emojis and sanitize HTML
-        $value = LitEmoji::unicodeToShortcode((string)$value);
+        $value = self::emojiToShortcodes((string)$value);
         $value = StringHelper::htmlEncode((string)$value);
 
         return $value;
     }
 
-    public static function unSanitizeNotes($value): ?string
+    public static function unSanitizeNotes(?string $value): ?string
     {
         // Support Emojis and sanitize HTML
-        $value = LitEmoji::shortcodeToUnicode((string)$value);
+        $value = self::shortcodesToEmoji((string)$value);
 
         return $value;
     }
+
+    public static function emojiToShortcodes(string $str): string
+    {
+        // Add delimiters around all 4-byte chars
+        $dl = '__MB4_DL__';
+        $dr = '__MB4_DR__';
+        $str = self::replaceMb4($str, fn($char) => sprintf('%s%s%s', $dl, $char, $dr));
+
+        // Strip out consecutive delimiters
+        $str = str_replace(sprintf('%s%s', $dr, $dl), '', $str);
+
+        // Replace all 4-byte sequences individually
+        return preg_replace_callback("/$dl(.+?)$dr/", fn($m) => LitEmoji::unicodeToShortcode($m[1]), $str);
+    }
+
+    public static function shortcodesToEmoji(string $str): string
+    {
+        return LitEmoji::shortcodeToUnicode($str);
+    }
 }