# copyright 2003-2014 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
"""some views to handle notification on data changes"""
from cubicweb import _
from itertools import repeat
from six import text_type
from logilab.common.textutils import normalize_text
from logilab.common.registry import yes
from cubicweb.view import Component, EntityView
from cubicweb.server.hook import SendMailOp
from cubicweb.mail import construct_message_id, format_mail
from cubicweb.server.session import Connection, InternalManager
class RecipientsFinder(Component):
"""this component is responsible to find recipients of a notification
by default user's with their email set are notified if any, else the default
email addresses specified in the configuration are used
"""
__regid__ = 'recipients_finder'
__select__ = yes()
user_rql = ('Any X,E,A WHERE X is CWUser, X in_state S, S name "activated",'
'X primary_email E, E address A')
def recipients(self):
mode = self._cw.vreg.config['default-recipients-mode']
if mode == 'users':
execute = self._cw.execute
dests = list(execute(self.user_rql, build_descr=True).entities())
elif mode == 'default-dest-addrs':
lang = self._cw.vreg.property_value('ui.language')
dests = zip(self._cw.vreg.config['default-dest-addrs'], repeat(lang))
else: # mode == 'none'
dests = []
return dests
# abstract or deactivated notification views and mixin ########################
class SkipEmail(Exception):
"""raise this if you decide to skip an email during its generation"""
class NotificationView(EntityView):
"""abstract view implementing the "email" API (eg to simplify sending
notification)
"""
# XXX refactor this class to work with len(rset) > 1
msgid_timestamp = True
# to be defined on concrete sub-classes
content = None # body of the mail
message = None # action verb of the subject
# this is usually the method to call
def render_and_send(self, **kwargs):
"""generate and send email messages for this view"""
# render_emails changes self._cw so cache it here so all mails are sent
# after we commit our transaction.
cnx = self._cw
for msg, recipients in self.render_emails(**kwargs):
SendMailOp(cnx, recipients=recipients, msg=msg)
def cell_call(self, row, col=0, **kwargs):
self.w(self._cw._(self.content) % self.context(**kwargs))
def render_emails(self, **kwargs):
"""generate and send emails for this view (one per recipient)"""
self._kwargs = kwargs
recipients = self.recipients()
if not recipients:
self.info('skipping %s notification, no recipients', self.__regid__)
return
if self.cw_rset is not None:
entity = self.cw_rset.get_entity(self.cw_row or 0, self.cw_col or 0)
# if the view is using timestamp in message ids, no way to reference
# previous email
if not self.msgid_timestamp:
refs = [self.construct_message_id(eid)
for eid in entity.cw_adapt_to('INotifiable').notification_references(self)]
else:
refs = ()
msgid = self.construct_message_id(entity.eid)
else:
refs = ()
msgid = None
req = self._cw
self.user_data = req.user_data()
for something in recipients:
if isinstance(something, tuple):
emailaddr, lang = something
user = InternalManager(lang=lang)
else:
emailaddr = something.cw_adapt_to('IEmailable').get_email()
user = something
# hi-jack self._cw to get a session for the returned user
with Connection(self._cw.repo, user) as cnx:
self._cw = cnx
try:
# since the same view (eg self) may be called multiple time and we
# need a fresh stream at each iteration, reset it explicitly
self.w = None
try:
# XXX forcing the row & col here may make the content and
# subject inconsistent because subject will depend on
# self.cw_row & self.cw_col if they are set.
content = self.render(row=0, col=0, **kwargs)
subject = self.subject()
except SkipEmail:
continue
except Exception as ex:
# shouldn't make the whole transaction fail because of rendering
# error (unauthorized or such) XXX check it doesn't actually
# occurs due to rollback on such error
self.exception(str(ex))
continue
msg = format_mail(self.user_data, [emailaddr], content, subject,
config=self._cw.vreg.config, msgid=msgid, references=refs)
yield msg, [emailaddr]
finally:
self._cw = req
# recipients handling ######################################################
def recipients(self):
"""return a list of either 2-uple (email, language) or user entity to
whom this email should be sent
"""
finder = self._cw.vreg['components'].select(
'recipients_finder', self._cw, rset=self.cw_rset,
row=self.cw_row or 0, col=self.cw_col or 0)
return finder.recipients()
# email generation helpers #################################################
def construct_message_id(self, eid):
return construct_message_id(self._cw.vreg.config.appid, eid,
self.msgid_timestamp)
def format_field(self, attr, value):
return ':%(attr)s: %(value)s' % {'attr': attr, 'value': value}
def format_section(self, attr, value):
return '%(attr)s\n%(ul)s\n%(value)s\n' % {
'attr': attr, 'ul': '-' * len(attr), 'value': value}
def subject(self):
entity = self.cw_rset.get_entity(self.cw_row or 0, self.cw_col or 0)
subject = self._cw._(self.message)
etype = entity.dc_type()
eid = entity.eid
login = self.user_data['login']
return self._cw._('%(subject)s %(etype)s #%(eid)s (%(login)s)') % locals()
def context(self, **kwargs):
entity = self.cw_rset.get_entity(self.cw_row or 0, self.cw_col or 0)
for key, val in kwargs.items():
if val and isinstance(val, text_type) and val.strip():
kwargs[key] = self._cw._(val)
kwargs.update({'user': self.user_data['login'],
'eid': entity.eid,
'etype': entity.dc_type(),
'url': entity.absolute_url(),
'title': entity.dc_long_title()})
return kwargs
class StatusChangeMixIn(object):
__regid__ = 'notif_status_change'
msgid_timestamp = True
message = _('status changed')
content = _("""
%(user)s changed status from <%(previous_state)s> to <%(current_state)s> for entity
'%(title)s'
%(comment)s
url: %(url)s
""")
###############################################################################
# Actual notification views. #
# #
# disable them at the recipients_finder level if you don't want them #
###############################################################################
# XXX should be based on dc_title/dc_description, no?
class ContentAddedView(NotificationView):
"""abstract class for notification on entity/relation
all you have to do by default is :
* set id and __select__ attributes to match desired events and entity types
* set a content attribute to define the content of the email (unless you
override call)
"""
__abstract__ = True
__regid__ = 'notif_after_add_entity'
msgid_timestamp = False
message = _('new')
content = """
%(title)s
%(content)s
url: %(url)s
"""
# to be defined on concrete sub-classes
content_attr = None
def context(self, **kwargs):
entity = self.cw_rset.get_entity(self.cw_row or 0, self.cw_col or 0)
content = entity.printable_value(self.content_attr, format='text/plain')
if content:
contentformat = getattr(entity, self.content_attr + '_format',
'text/rest')
# XXX don't try to wrap rest until we've a proper transformation (see
# #103822)
if contentformat != 'text/rest':
content = normalize_text(content, 80)
return super(ContentAddedView, self).context(content=content, **kwargs)
def subject(self):
entity = self.cw_rset.get_entity(self.cw_row or 0, self.cw_col or 0)
return u'%s #%s (%s)' % (self._cw.__('New %s' % entity.e_schema),
entity.eid, self.user_data['login'])
def format_value(value):
if isinstance(value, text_type):
return u'"%s"' % value
return value
class EntityUpdatedNotificationView(NotificationView):
"""abstract class for notification on entity/relation
all you have to do by default is :
* set id and __select__ attributes to match desired events and entity types
* set a content attribute to define the content of the email (unless you
override call)
"""
__abstract__ = True
__regid__ = 'notif_entity_updated'
msgid_timestamp = True
message = _('updated')
no_detailed_change_attrs = ()
content = """
Properties have been updated by %(user)s:
%(changes)s
url: %(url)s
"""
def context(self, changes=(), **kwargs):
context = super(EntityUpdatedNotificationView, self).context(**kwargs)
_ = self._cw._
formatted_changes = []
entity = self.cw_rset.get_entity(self.cw_row or 0, self.cw_col or 0)
for attr, oldvalue, newvalue in sorted(changes):
# check current user has permission to see the attribute
rschema = self._cw.vreg.schema[attr]
if rschema.final:
rdef = entity.e_schema.rdef(rschema)
if not rdef.has_perm(self._cw, 'read', eid=self.cw_rset[0][0]):
continue
# XXX suppose it's a subject relation...
elif not rschema.has_perm(self._cw, 'read',
fromeid=self.cw_rset[0][0]):
continue
if attr in self.no_detailed_change_attrs:
msg = _('%s updated') % _(attr)
elif oldvalue not in (None, ''):
msg = _('%(attr)s updated from %(oldvalue)s to %(newvalue)s') % {
'attr': _(attr),
'oldvalue': format_value(oldvalue),
'newvalue': format_value(newvalue)}
else:
msg = _('%(attr)s set to %(newvalue)s') % {
'attr': _(attr), 'newvalue': format_value(newvalue)}
formatted_changes.append('* ' + msg)
if not formatted_changes:
# current user isn't allowed to see changes, skip this notification
raise SkipEmail()
context['changes'] = '\n'.join(formatted_changes)
return context
def subject(self):
entity = self.cw_rset.get_entity(self.cw_row or 0, self.cw_col or 0)
return u'%s #%s (%s)' % (self._cw.__('Updated %s' % entity.e_schema),
entity.eid, self.user_data['login'])