if len(bits) == 3 and bits[1] == "as":

            return cls(bits[2])

        else:

            raise template.TemplateSyntaxError("%r takes 'as var'" % bits[0])

    def __init__(self, context_var):

        self.context_var = context_var

    def render(self, context):

        request = context["request"]

        teams = []

        for team in Team.objects.all():

            state = team.get_state_for_user(request.user)

            if team.access == "open":

                if state in [None, "invited"]:

                    teams.append(team)

            elif team.access == "application":

                if state in [None, "invited", "applied"]:

                    teams.append(team)

            elif team.access == "invitation":

                if state == "invited":

                    teams.append(team)

        context[self.context_var] = teams

        return u""