[feat]. Add username and custom bot mention tags

src/gitea_codex_bot/services/commands.py

@@ -1,19 +1,25 @@
 from __future__ import annotations
 
 import re
+from collections.abc import Iterable
 
 from gitea_codex_bot.types import ParsedCommand
 
-COMMAND_RE = re.compile(r"^@codex\s+(review|explain|fix|ignore|rerun)\b(.*)$", re.IGNORECASE | re.DOTALL)
+COMMAND_RE = re.compile(r"^@([^\s]+)\s+(review|explain|fix|ignore|rerun)\b(.*)$", re.IGNORECASE | re.DOTALL)
 
 
-def parse_command(body: str) -> ParsedCommand | None:
+def parse_command(body: str, aliases: Iterable[str] | None = None) -> ParsedCommand | None:
     stripped = body.strip()
     match = COMMAND_RE.match(stripped)
     if not match:
         return None
-    name = match.group(1).lower()
-    rest = match.group(2).strip()
+    command_alias = match.group(1).lstrip("@").lower()
+    allowed_aliases = {alias.lstrip("@").lower() for alias in (aliases or {"codex"})}
+    if command_alias not in allowed_aliases:
+        return None
+
+    name = match.group(2).lower()
+    rest = match.group(3).strip()
     tokens = [token for token in rest.split() if token]
 
     parsed = ParsedCommand(name=name, raw=stripped, arguments=tokens)