def join_team()

in backend/services/team_service.py [0:0]
32 lines of code
10 McCabe index (conditional complexity)

    def join_team(team_id: int, requesting_user: int, username: str, role: str = None):
        is_manager = TeamService.is_user_team_manager(team_id, requesting_user)
        team = TeamService.get_team_by_id(team_id)
        user = UserService.get_user_by_username(username)

        if TeamService.is_user_team_member(team.id, user.id):
            raise TeamJoinNotAllowed(
                "User is already a member of this team or has already requested to join"
            )

        if is_manager:
            if role:
                try:
                    role = TeamMemberFunctions[role.upper()].value
                except KeyError:
                    raise Exception("Invalid TeamMemberFunction")
            else:
                role = TeamMemberFunctions.MEMBER.value

            TeamService.add_team_member(team_id, user.id, role, True)
        else:
            if user.id != requesting_user:
                raise TeamJoinNotAllowed("User not allowed to join team")

            role = TeamMemberFunctions.MEMBER.value

            # active if the team is open
            if team.invite_only:
                active = False
            else:
                active = True

            TeamService.add_team_member(team_id, user.id, role, active)

            if team.invite_only:
                team_managers = team.get_team_managers()
                for member in team_managers:
                    MessageService.send_request_to_join_team(
                        user.id, user.username, member.user_id, team.name, team_id
                    )