plone.app.discussion/plone/app/discussion/comment.py

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# -*- coding: utf-8 -*-
"""The default comment class and factory.
"""
import logging
from datetime import datetime
from smtplib import SMTPException
from zope.annotation.interfaces import IAnnotatable
from zope.component.factory import Factory
from zope.component import queryUtility
from zope.i18n import translate
from zope.i18nmessageid import Message
from zope.interface import implements
from Acquisition import aq_parent, aq_base, Implicit
from OFS.owner import Owned
from persistent import Persistent
from Products.CMFCore.DynamicType import DynamicType
from Products.CMFCore.utils import getToolByName
from Products.CMFPlone.utils import safe_unicode
from OFS.Traversable import Traversable
from plone.registry.interfaces import IRegistry
from plone.app.discussion import PloneAppDiscussionMessageFactory as _
from plone.app.discussion.interfaces import IComment
from plone.app.discussion.interfaces import IConversation
from plone.app.discussion.interfaces import IDiscussionSettings
from Products.CMFCore.CMFCatalogAware import CatalogAware
from Products.CMFCore.CMFCatalogAware import WorkflowAware
from OFS.role import RoleManager
COMMENT_TITLE = _(
u"comment_title",
default=u"${author_name} on ${content}")
MAIL_NOTIFICATION_MESSAGE = _(
u"mail_notification_message",
default=u"A comment on '${title}' "
"has been posted here: ${link}\n\n"
"---\n"
"${text}\n"
"---\n")
MAIL_NOTIFICATION_MESSAGE_MODERATOR = _(
u"mail_notification_message_moderator",
default=u"A comment on '${title}' "
"has been posted here: ${link}\n\n"
"---\n"
"${text}\n"
"---\n\n"
"Approve comment:\n${link_approve}\n\n"
"Delete comment:\n${link_delete}\n")
logger = logging.getLogger("plone.app.discussion")
class Comment(CatalogAware, WorkflowAware, DynamicType, Traversable,
RoleManager, Owned, Implicit, Persistent):
"""A comment.
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This object attempts to be as lightweight as possible. We implement a
number of standard methods instead of subclassing, to have total control
over what goes into the object.
"""
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implements(IComment)
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meta_type = portal_type = 'Discussion Item'
# This needs to be kept in sync with types/Discussion_Item.xml title
fti_title = 'Comment'
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__parent__ = None
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comment_id = None # long
in_reply_to = None # long
title = u""
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mime_type = "text/plain"
text = u""
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creator = None
creation_date = None
modification_date = None
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author_username = None
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author_name = None
author_email = None
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user_notification = None
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# Note: we want to use zope.component.createObject() to instantiate
# comments as far as possible. comment_id and __parent__ are set via
# IConversation.addComment().
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def __init__(self):
self.creation_date = self.modification_date = datetime.utcnow()
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@property
def __name__(self):
return self.comment_id and unicode(self.comment_id) or None
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@property
def id(self):
return self.comment_id and str(self.comment_id) or None
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def getId(self):
"""The id of the comment, as a string.
"""
return self.id
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def getText(self, targetMimetype=None):
"""The body text of a comment.
"""
transforms = getToolByName(self, 'portal_transforms')
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if targetMimetype is None:
targetMimetype = 'text/x-html-safe'
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sourceMimetype = getattr(self, 'mime_type', None)
if sourceMimetype is None:
registry = queryUtility(IRegistry)
settings = registry.forInterface(IDiscussionSettings, check=False)
sourceMimetype = settings.text_transform
text = self.text
if text is None:
return ''
if isinstance(text, unicode):
text = text.encode('utf8')
return transforms.convertTo(targetMimetype,
text,
context=self,
mimetype=sourceMimetype).getData()
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def Title(self):
"""The title of the comment.
"""
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if self.title:
return self.title
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if not self.author_name:
author_name = translate(Message(_(u"label_anonymous",
default=u"Anonymous")))
else:
author_name = self.author_name
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# Fetch the content object (the parent of the comment is the
# conversation, the parent of the conversation is the content object).
content = aq_base(self.__parent__.__parent__)
title = translate(
Message(COMMENT_TITLE,
mapping={'author_name': author_name,
'content': safe_unicode(content.Title())}))
return title
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def Creator(self):
"""The name of the person who wrote the comment.
"""
return self.creator
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def Type(self):
"""The Discussion Item content type.
"""
return self.fti_title
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# CMF's event handlers assume any IDynamicType has these :(
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def opaqueItems(self): # pragma: no cover
return []
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def opaqueIds(self): # pragma: no cover
return []
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def opaqueValues(self): # pragma: no cover
return []
CommentFactory = Factory(Comment)
def notify_workflow(obj, event):
"""Tell the workflow tool when a comment is added
"""
tool = getToolByName(obj, 'portal_workflow', None)
if tool is not None:
tool.notifyCreated(obj)
def notify_content_object(obj, event):
"""Tell the content object when a comment is added
"""
content_obj = aq_parent(aq_parent(obj))
# set the modified date and reindex the item accordingly
# so that 304s work correctly. This means that adding a comment
# effectively counts as modifying the content type.
content_obj.setModificationDate()
content_obj.reindexObject(idxs=('total_comments',
'last_comment_date',
'commentators',
))
def notify_content_object_deleted(obj, event):
"""Remove all comments of a content object when the content object has been
deleted.
"""
if IAnnotatable.providedBy(obj):
conversation = IConversation(obj)
while conversation:
del conversation[conversation.keys()[0]]
def notify_content_object_moved(obj, event):
"""Update all comments of a content object that has been moved.
"""
if event.oldParent is None or event.newParent is None \
or event.oldName is None or event.newName is None:
return
# Remove comments at the old location from catalog
catalog = getToolByName(obj, 'portal_catalog')
old_path = '/'.join(event.oldParent.getPhysicalPath() + (event.oldName,))
brains = catalog.searchResults(dict(
path={'query': old_path},
portal_type="Discussion Item"
))
for brain in brains:
catalog.uncatalog_object(brain.getPath())
# Reindex comment at the new location
conversation = IConversation(obj, None)
if conversation is not None:
for comment in conversation.getComments():
aq_base(comment).__parent__.__parent__.__parent__ = event.newParent
catalog.reindexObject(aq_base(comment))
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def notify_user(obj, event):
"""Tell users when a comment has been added.
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This method composes and sends emails to all users that have added a
comment to this conversation and enabled user notification.
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This requires the user_notification setting to be enabled in the
discussion control panel.
"""
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# Check if user notification is enabled
registry = queryUtility(IRegistry)
settings = registry.forInterface(IDiscussionSettings, check=False)
if not settings.user_notification_enabled:
return
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# Get informations that are necessary to send an email
mail_host = getToolByName(obj, 'MailHost')
portal_url = getToolByName(obj, 'portal_url')
portal = portal_url.getPortalObject()
sender = portal.getProperty('email_from_address')
# Check if a sender address is available
if not sender:
return
# Compose and send emails to all users that have add a comment to this
# conversation and enabled user_notification.
conversation = aq_parent(obj)
content_object = aq_parent(conversation)
# Avoid sending multiple notification emails to the same person
# when he has commented multiple times.
emails = set()
for comment in conversation.getComments():
if (obj != comment and
comment.user_notification and comment.author_email):
emails.add(comment.author_email)
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if not emails:
return
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subject = translate(_(u"A comment has been posted."),
context=obj.REQUEST)
message = translate(Message(
MAIL_NOTIFICATION_MESSAGE,
mapping={'title': safe_unicode(content_object.title),
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'link': content_object.absolute_url() +
'/view#' + obj.id,
'text': obj.text}),
context=obj.REQUEST)
for email in emails:
# Send email
try:
mail_host.send(message,
email,
sender,
subject,
charset='utf-8')
except SMTPException:
logger.error('SMTP exception while trying to send an ' +
'email from %s to %s',
sender,
email)
def notify_moderator(obj, event):
"""Tell the moderator when a comment needs attention.
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This method sends an email to the moderator if comment moderation a new
comment has been added that needs to be approved.
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The moderator_notification setting has to be enabled in the discussion
control panel.
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Configure the moderator e-mail address in the discussion control panel.
If no moderator is configured but moderator notifications are turned on,
the site admin email (from the mail control panel) will be used.
"""
# Check if moderator notification is enabled
registry = queryUtility(IRegistry)
settings = registry.forInterface(IDiscussionSettings, check=False)
if not settings.moderator_notification_enabled:
return
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# Get informations that are necessary to send an email
mail_host = getToolByName(obj, 'MailHost')
portal_url = getToolByName(obj, 'portal_url')
portal = portal_url.getPortalObject()
sender = portal.getProperty('email_from_address')
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if settings.moderator_email:
mto = settings.moderator_email
else:
mto = sender
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# Check if a sender address is available
if not sender:
return
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conversation = aq_parent(obj)
content_object = aq_parent(conversation)
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# Compose email
subject = translate(_(u"A comment has been posted."), context=obj.REQUEST)
message = translate(Message(MAIL_NOTIFICATION_MESSAGE_MODERATOR,
mapping={
'title': safe_unicode(content_object.title),
'link': content_object.absolute_url() + '/view#' + obj.id,
'text': obj.text,
'link_approve': obj.absolute_url() + '/@@moderate-publish-comment',
'link_delete': obj.absolute_url() + '/@@moderate-delete-comment',
}),
context=obj.REQUEST)
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# Send email
try:
mail_host.send(message, mto, sender, subject, charset='utf-8')
except SMTPException, e:
logger.error('SMTP exception (%s) while trying to send an ' +
'email notification to the comment moderator ' +
'(from %s to %s, message: %s)',
e,
sender,
mto,
message)