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apphook_pool.py
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apphook_pool.py
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# -*- coding: utf-8 -*-
from cms.exceptions import AppAllreadyRegistered
from django.conf import settings
from django.core.exceptions import ImproperlyConfigured
from django.utils.importlib import import_module
class ApphookPool(object):
def __init__(self):
self.apps = {}
self.discovered = False
self.block_register = False
def discover_apps(self):
if self.discovered:
return
#import all the modules
if settings.CMS_APPHOOKS:
for app in settings.CMS_APPHOOKS:
self.block_register = True
path = ".".join(app.split(".")[:-1])
class_name = app.split(".")[-1]
module = import_module(path)
cls = getattr(module, class_name, None)
if cls is None:
raise ImproperlyConfigured(
"Cannot find class %s" % app
)
self.block_register = False
self.register(cls)
else:
for app in settings.INSTALLED_APPS:
cms_app = '%s.cms_app' % app
try:
import_module(cms_app)
except ImportError:
pass
self.discovered = True
def clear(self):
self.apps = {}
self.discovered = False
def register(self, app):
if self.block_register:
return
from cms.app_base import CMSApp
assert issubclass(app, CMSApp)
if app.__name__ in self.apps.keys():
raise AppAllreadyRegistered, "[%s] an cms app with this name is already registered" % app.__name__
self.apps[app.__name__] = app
def get_apphooks(self):
self.discover_apps()
hooks = []
for app_name in self.apps.keys():
app = self.apps[app_name]
hooks.append((app_name, app.name))
# Unfortunately, we loose the ordering since we now have a list of tuples. Let's reorder by app_name:
hooks = sorted(hooks, key=lambda hook: hook[1])
return hooks
def get_apphook(self, app_name):
try:
return self.apps[app_name]
except KeyError:
# deprecated: return apphooks registered in db with urlconf name instead of apphook class name
for app in self.apps.values():
if app_name in app.urls:
return app
raise ImproperlyConfigured('No registered apphook `%s` found.' % app_name)
apphook_pool = ApphookPool()