# Wrapper for loading templates from eggs via pkg_resources.resource_string.

try:

    from pkg_resources import resource_string

except ImportError:

    resource_string = None

from django.template import TemplateDoesNotExist

from django.template.loader import BaseLoader

from django.conf import settings

class Loader(BaseLoader):

    is_usable = resource_string is not None

    def load_template_source(self, template_name, template_dirs=None):

        """

        Loads templates from Python eggs via pkg_resource.resource_string.

        For every installed app, it tries to get the resource (app, template_name).

        """

        if resource_string is not None:

            pkg_name = 'templates/' + template_name

            for app in settings.INSTALLED_APPS:

                try:

                    return (resource_string(app, pkg_name).decode(settings.FILE_CHARSET), 'egg:%s:%s' % (app, pkg_name))

                except:

                    pass

        raise TemplateDoesNotExist(template_name)

_loader = Loader()

def load_template_source(template_name, template_dirs=None):

    import warnings

    warnings.warn(

        "'django.template.loaders.eggs.load_template_source' is deprecated; use 'django.template.loaders.eggs.Loader' instead.",

        PendingDeprecationWarning

    )

    return _loader.load_template_source(template_name, template_dirs)

load_template_source.is_usable = resource_string is not None