"""Get feature flags on backend."""
from flask import g
from pythonfeatures import pythonfeatures
from pythonfeatures.constants import split as split_constants


def is_feature_enabled(flag_name):
    """Check if users requested feature flag is enabled.

    Args:
        flag_name (str): name of the flag to be checked.

    Returns:
        bool: whether feature is enabled
    """
    is_enabled = pythonfeatures.get_single_feature(
        flag_name, g.request_context
    ).message == split_constants.FEATURE_ENABLED

    g.ows.log.info(f'split {flag_name}: called with context_type '
                   f'{g.request_context} is {is_enabled}')
    return is_enabled