# Copyright 2016  Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# =*= License: GPL-3+ =*=


import time

import jinja2


class HtmlRenderer(object):

    def render(self, template_name, variables):
        env = self._get_env()
        self._add_custom_filters(env)
        template = env.get_template(template_name)
        return template.render(**variables)

    def _get_env(self):
        loader = jinja2.PackageLoader('distixlib')
        return jinja2.Environment(
            loader=loader,
            autoescape=lambda _: True,
            extensions=['jinja2.ext.autoescape'],
        )

    def _add_custom_filters(self, env):
        env.filters['date'] = self._date_filter

    def _date_filter(self, value):  # pragma: no cover
        tm = time.gmtime(value)
        return time.strftime('%Y-%m-%d', tm)