Source code for mezzanine.utils.sites

from __future__ import unicode_literals

import os
import sys

from django.contrib.sites.models import Site

from mezzanine.conf import settings
from mezzanine.core.request import current_request

[docs]def current_site_id(): """ Responsible for determining the current ``Site`` instance to use when retrieving data for any ``SiteRelated`` models. If a request is available, and the site can be determined from it, we store the site against the request for subsequent retrievals. Otherwise the order of checks is as follows: - ``site_id`` in session. Used in the admin so that admin users can switch sites and stay on the same domain for the admin. - host for the current request matched to the domain of the site instance. - ``MEZZANINE_SITE_ID`` environment variable, so management commands or anything else outside of a request can specify a site. - ``SITE_ID`` setting. """ from mezzanine.utils.cache import cache_installed, cache_get, cache_set request = current_request() site_id = getattr(request, "site_id", None) if request and not site_id: site_id = request.session.get("site_id", None) if not site_id: domain = request.get_host().lower() if cache_installed(): # Don't use Mezzanine's cache_key_prefix here, since it # uses this very function we're in right now to create a # per-site cache key. bits = (settings.CACHE_MIDDLEWARE_KEY_PREFIX, domain) cache_key = "%s.site_id.%s" % bits site_id = cache_get(cache_key) if not site_id: try: site = Site.objects.get(domain__iexact=domain) except Site.DoesNotExist: pass else: site_id = if cache_installed(): cache_set(cache_key, site_id) if request and site_id: request.site_id = site_id if not site_id: site_id = os.environ.get("MEZZANINE_SITE_ID", settings.SITE_ID) if request and site_id and not getattr(settings, "TESTING", False): request.site_id = site_id return site_id
[docs]def has_site_permission(user): """ Checks if a staff user has staff-level access for the current site. The actual permission lookup occurs in ``SitePermissionMiddleware`` which then marks the request with the ``has_site_permission`` flag, so that we only query the db once per request, so this function serves as the entry point for everything else to check access. We also fall back to an ``is_staff`` check if the middleware is not installed, to ease migration. """ mw = "mezzanine.core.middleware.SitePermissionMiddleware" if mw not in settings.MIDDLEWARE_CLASSES: from warnings import warn warn(mw + " missing from settings.MIDDLEWARE_CLASSES - per site" "permissions not applied") return user.is_staff and user.is_active return getattr(user, "has_site_permission", False)
[docs]def host_theme_path(): """ Returns the directory of the theme associated with the given host. """ # Set domain to None, which we'll then query for in the first # iteration of HOST_THEMES. We use the current site_id rather # than a request object here, as it may differ for admin users. domain = None for (host, theme) in settings.HOST_THEMES: if domain is None: domain = Site.objects.get(id=current_site_id()).domain if host.lower() == domain.lower(): try: __import__(theme) module = sys.modules[theme] except ImportError: pass else: return os.path.dirname(os.path.abspath(module.__file__)) return ""
[docs]def templates_for_host(templates): """ Given a template name (or list of them), returns the template names as a list, with each name prefixed with the device directory inserted into the front of the list. """ if not isinstance(templates, (list, tuple)): templates = [templates] theme_dir = host_theme_path() host_templates = [] if theme_dir: for template in templates: host_templates.append("%s/templates/%s" % (theme_dir, template)) host_templates.append(template) return host_templates return templates