Track roster connects and disconnects from the stats stream

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <[email protected]>

lib/parser.py

@@ -65,8 +65,8 @@ class EventParser:
                 'MATCH_STARTED': self._handle_match_started,
                 'MATCH_REPORT': self._handle_match_report,
                 'PLAYER_STATS': self._handle_player_stats,
-                'PLAYER_CONNECT': lambda d: None,
+                'PLAYER_CONNECT': self._handle_player_connect,
-                'PLAYER_DISCONNECT': lambda d: None,
+                'PLAYER_DISCONNECT': self._handle_player_disconnect,
                 'ROUND_OVER': self._handle_round_over,
             }
 
@@ -92,6 +92,28 @@ class EventParser:
             logger.debug(f'Error parsing event: {e}')
             return None
 
+    def _handle_player_connect(self, data):
+        """Track a connecting player so the roster is complete; connects to the
+        server land as spectators until they join a team. No feed line: the
+        RCON connect broadcast already displays one."""
+        name = data.get('NAME')
+        if not name:
+            return None
+        team = data.get('TEAM')
+        if team is None:
+            team = 'SPECTATOR'
+        self.game_state.player_tracker.update_team(name, team)
+        self.game_state.player_tracker.add_player(name)
+        return None
+
+    def _handle_player_disconnect(self, data):
+        """Remove a disconnecting player from the roster. No feed line: the
+        RCON disconnect broadcast already displays one."""
+        name = data.get('NAME')
+        if name:
+            self.game_state.player_tracker.remove_player(name)
+        return None
+
     def _handle_switchteam(self, data):
         """Handle PLAYER_SWITCHTEAM event"""