import json
from flask import session
import sanitize
import config_utils


def collect_tokens(cfg):
    tokens = config_utils.collect_layout_tokens(cfg)
    blank = [{'value': '', 'label': '-- Select timezone --'}]
    tokens['PREF_EMAIL'] = session.get('email_address', '')
    tokens['PREF_TIMEZONE'] = session.get('timezone', '')
    tokens['TIMEZONE_OPTIONS'] = json.dumps(blank + [{'value': tz, 'label': tz} for tz in sanitize.VALID_TIMEZONES])
    return tokens