Corrige navegação entre meses calendário estendido

Fecha #82.

Patch foi feito da forma tradicional e não com uso de
collective.monkeypatcher, ver

https://pypi.org/project/collective.monkeypatcher/#patching-module-level-functions

CHANGES.rst

@@ -4,6 +4,9 @@ Changelog
 1.1.3 (unreleased)
 ^^^^^^^^^^^^^^^^^^
 
+- Corrige (via patch) navegação entre os meses de um calendário estendido. (fecha `#82`_).
+  [idgserpro]
+
 - Corrige layout do portlet de agenda após atualização de plone.app.contenttypes 1.1.x. (relacionado a `#82`_).
   [idgserpro]
 

src/brasil/gov/agenda/__init__.py

@@ -1,6 +1,10 @@
 # -*- coding: utf-8 -*-
 
+from brasil.gov.agenda import patches
 from zope.i18nmessageid import MessageFactory
 
 
 _ = MessageFactory('brasil.gov.agenda')
+
+
+patches.run()

src/brasil/gov/agenda/patches.py

@@ -0,0 +1,60 @@
+# -*- coding: utf-8 -*-
+
+from brasil.gov.agenda.logger import logger
+from plone.app.portlets import utils
+from plone.app.portlets.storage import PortletAssignmentMapping
+from plone.app.portlets.storage import UserPortletAssignmentMapping
+from plone.portlets.constants import CONTEXT_CATEGORY
+from plone.portlets.constants import USER_CATEGORY
+from plone.portlets.interfaces import IPortletAssignmentMapping
+from plone.portlets.interfaces import IPortletManager
+from Products.CMFCore.utils import getToolByName
+from zope.component import getMultiAdapter
+from zope.component import getUtility
+
+
+def assignment_mapping_from_key():
+    # Customização obtida de
+    # https://github.com/plone/plone.app.portlets/blob/2.5.6/plone/app/portlets/utils.py#L55
+    def patched_assignment_mapping_from_key(context, manager_name, category, key, create=False):
+        """Given the name of a portlet manager, the name of a category, and a
+        key in that category, return the IPortletAssignmentMapping.
+        Raise a KeyError if it cannot be found.
+        """
+        manager = getUtility(IPortletManager, manager_name)
+
+        if category == CONTEXT_CATEGORY:
+            path = key
+            portal = getToolByName(context, 'portal_url').getPortalObject()
+            portal_path = '/'.join(portal.getPhysicalPath())
+            if path == portal_path:
+                # there may be problem if PloneSite id is 'plone'.
+                # restrictedTraverse traverses to @@plone BrowserView which
+                # is wrong
+                obj = portal
+            else:
+                if path.startswith(portal_path + '/'):
+                    path = path[len(portal_path)+1:]  # NOQA
+                while path.startswith('/'):
+                    path = path[1:]
+                # INICIO CUSTOMIZAÇÃO
+                obj = portal.restrictedTraverse(str(path), None)
+                # FIM CUSTOMIZAÇÃO
+            if obj is None:
+                raise KeyError, "Cannot find object at path %s" % path  # NOQA
+            return getMultiAdapter((obj, manager), IPortletAssignmentMapping)
+        else:
+            mapping = manager[category]
+            if key not in mapping and create:
+                if category == USER_CATEGORY:
+                    mapping[key] = UserPortletAssignmentMapping()
+                else:
+                    mapping[key] = PortletAssignmentMapping()
+            return mapping[key]
+
+    setattr(utils, 'assignment_mapping_from_key', patched_assignment_mapping_from_key)
+    logger.info('Patched plone.app.portlets.utils.assignment_mapping_from_key')
+
+
+def run():
+    assignment_mapping_from_key()