public function logout($member, $room)
 {
     $obj = new ChatContent();
     $obj->ChatRoom = $room;
     $obj->Member = $member;
     $obj->level = 10;
     $obj->body = $member->name . ' さんがログアウトしました';
     $obj->save();
 }
 public function post($room_id, $member_id, $body, $options = array())
 {
     $post = new ChatContent();
     $post->chat_room_id = $room_id;
     $post->member_id = $member_id;
     $post->body = $body;
     if (isset($options['level'])) {
         $post->level = $options['level'];
     }
     if (isset($options['command'])) {
         $post->command = $options['command'];
     }
     $post->save();
 }