# Wrapper for loading templates from the filesystem.

from django.conf import settings
from django.template import TemplateDoesNotExist
import os
from django.utils import translation

def get_template_sources(template_name, template_dirs=None, locale_fix=None):
    if not template_dirs:
        template_dirs = settings.TEMPLATE_DIRS
    for template_dir in template_dirs:
        if locale_fix:
            yield os.path.join(template_dir, locale_fix, template_name)
        yield os.path.join(template_dir, template_name)

def load_template_source(template_name, template_dirs=None):
    tried = []
    if translation.get_language() != settings.LANGUAGE_CODE[:2]:
        for filepath in get_template_sources(template_name, template_dirs, 'locale/'+translation.get_language()):
            try:
                return (open(filepath).read(), filepath)
            except IOError:
                tried.append(filepath)
    else:
        for filepath in get_template_sources(template_name, template_dirs):
            try:
                return (open(filepath).read(), filepath)
            except IOError:
                tried.append(filepath)
    if tried:
        error_msg = "Tried %s" % tried
    else:
        error_msg = "Your TEMPLATE_DIRS setting is empty. Change it to point to at least one template directory."
    raise TemplateDoesNotExist, error_msg
load_template_source.is_usable = True