from zope.component import queryUtility from plone.registry.interfaces import IRegistry from Acquisition import aq_base from Acquisition import aq_chain from Acquisition import aq_inner from Products.CMFCore.utils import getToolByName from Products.CMFCore.interfaces import IFolderish from Products.CMFPlone.interfaces import IPloneSiteRoot from Products.CMFPlone.interfaces import INonStructuralFolder from plone.app.discussion.interfaces import IDiscussionSettings try: from plone.dexterity.interfaces import IDexterityContent DEXTERITY_INSTALLED = True except: DEXTERITY_INSTALLED = False class ConversationView(object): def enabled(self): if DEXTERITY_INSTALLED and IDexterityContent.providedBy(self.context): return self._enabled_for_dexterity_types() else: return self._enabled_for_archetypes() def _enabled_for_archetypes(self): """ Returns True if discussion is enabled for this conversation. This method checks five different settings in order to figure out if discussion is enable on a specific content object: 1) Check if discussion is enabled globally in the plone.app.discussion registry/control panel. 2) If the current content object is a folder, always return False, since we don't allow comments on a folder. This setting is used to allow/ disallow comments for all content objects inside a folder, not for the folder itself. 3) Check if the allow_discussion boolean flag on the content object is set. If it is set to True or False, return the value. If it set to None, try further. 4) Traverse to a folder with allow_discussion set to either True or False. If allow_discussion is not set (None), traverse further until we reach the PloneSiteRoot. 5) Check if discussion is allowed for the content type. """ context = aq_inner(self.context) # Fetch discussion registry registry = queryUtility(IRegistry) settings = registry.forInterface(IDiscussionSettings, check=False) # Check if discussion is allowed globally if not settings.globally_enabled: return False # Always return False if object is a folder if (IFolderish.providedBy(context) and not INonStructuralFolder.providedBy(context)): return False def traverse_parents(context): # Run through the aq_chain of obj and check if discussion is # enabled in a parent folder. for obj in aq_chain(context): if not IPloneSiteRoot.providedBy(obj): if (IFolderish.providedBy(obj) and not INonStructuralFolder.providedBy(obj)): flag = getattr(obj, 'allow_discussion', None) if flag is not None: return flag return None # If discussion is disabled for the object, bail out obj_flag = getattr(aq_base(context), 'allow_discussion', None) if obj_flag is False: return False # Check if traversal returned a folder with discussion_allowed set # to True or False. folder_allow_discussion = traverse_parents(context) if folder_allow_discussion: if not getattr(self, 'allow_discussion', None): return True else: if obj_flag: return True # Check if discussion is allowed on the content type portal_types = getToolByName(self, 'portal_types') document_fti = getattr(portal_types, context.portal_type) if not document_fti.getProperty('allow_discussion'): # If discussion is not allowed on the content type, # check if 'allow discussion' is overridden on the content object. if not obj_flag: return False return True def _enabled_for_dexterity_types(self): """ Returns True if discussion is enabled for this conversation. This method checks five different settings in order to figure out if discussion is enable on a specific content object: 1) Check if discussion is enabled globally in the plone.app.discussion registry/control panel. 2) Check if the allow_discussion boolean flag on the content object is set. If it is set to True or False, return the value. If it set to None, try further. 3) Check if discussion is allowed for the content type. """ context = aq_inner(self.context) # Fetch discussion registry registry = queryUtility(IRegistry) settings = registry.forInterface(IDiscussionSettings, check=False) # Check if discussion is allowed globally if not settings.globally_enabled: return False # Check if discussion is allowed on the content object if hasattr(context, "allow_discussion"): if context.allow_discussion is not None: return context.allow_discussion # Check if discussion is allowed on the content type portal_types = getToolByName(self, 'portal_types') document_fti = getattr(portal_types, context.portal_type) return document_fti.getProperty('allow_discussion')