Add support for tags with optional emoji support

ntfy/emoji.py

@@ -0,0 +1,26 @@
+from typing import List, Tuple
+
+from mautrix.util.logging import TraceLogger
+
+try:
+    import emoji
+    WHITE_CHECK_MARK = emoji.emojize(":white_check_mark:")
+except ImportError:
+    emoji = None
+    WHITE_CHECK_MARK = "✅"
+
+
+def parse_tags(log: TraceLogger, tags: List[str]) -> Tuple[List[str], List[str]]:
+    if emoji is None:
+        log.warn("Please install the `emoji` package for emoji support")
+        return ([], tags)
+    emojis = []
+    non_emoji_tags = []
+
+    for tag in tags:
+        emojized = emoji.emojize(f":{tag}:")
+        if emoji.is_emoji(emojized):
+            emojis.append(emojized)
+        else:
+            non_emoji_tags.append(tag)
+    return (emojis, non_emoji_tags)