__init__.py - mozsearch

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from __future__ import absolute_import, print_function, unicode_literals

import re

from .render import renderValue, containsFunctions

from .shared import JSONTemplateError, DeleteMarker, TemplateError, fromNow

from . import builtins

_context_re = re.compile(r'[a-zA-Z_][a-zA-Z0-9_]*$')

def render(template, context):

    if type(context) != dict:

        raise TemplateError("context must be a dictionary")

    if not all(_context_re.match(c) for c in context):

        raise TemplateError('top level keys of context must follow '

                            '/[a-zA-Z_][a-zA-Z0-9_]*/')

    full_context = {'now': fromNow('0 seconds', None)}

    full_context.update(builtins.build())

    full_context.update(context)

    rv = renderValue(template, full_context)

    if rv is DeleteMarker:

        return None

    if containsFunctions(rv):

        raise TemplateError('evaluated template contained uncalled functions')

    return rv