sobjects/notification.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Fri, 22 Jan 2010 11:18:13 +0100
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"""some views to handle notification on data changes
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:organization: Logilab
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:copyright: 2001-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
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"""
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__docformat__ = "restructuredtext en"
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_ = unicode
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from itertools import repeat
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from logilab.common.textutils import normalize_text
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from logilab.common.deprecation import class_renamed, deprecated
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from cubicweb.selectors import yes
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from cubicweb.view import Component
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from cubicweb.mail import NotificationView, SkipEmail
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from cubicweb.server.hook import SendMailOp
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class RecipientsFinder(Component):
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    """this component is responsible to find recipients of a notification
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    by default user's with their email set are notified if any, else the default
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    email addresses specified in the configuration are used
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    """
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    __regid__ = 'recipients_finder'
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    __select__ = yes()
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    user_rql = ('Any X,E,A WHERE X is CWUser, X in_state S, S name "activated",'
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                'X primary_email E, E address A')
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    def recipients(self):
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        mode = self._cw.vreg.config['default-recipients-mode']
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        if mode == 'users':
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            # use unsafe execute else we may don't have the right to see users
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            # to notify...
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            execute = self._cw.unsafe_execute
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            dests = [(u.get_email(), u.property_value('ui.language'))
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                     for u in execute(self.user_rql, build_descr=True, propagate=True).entities()]
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        elif mode == 'default-dest-addrs':
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            lang = self._cw.vreg.property_value('ui.language')
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            dests = zip(self._cw.vreg.config['default-dest-addrs'], repeat(lang))
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        else: # mode == 'none'
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            dests = []
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        return dests
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# abstract or deactivated notification views and mixin ########################
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class NotificationView(NotificationView):
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    """overriden to delay actual sending of mails to a commit operation by
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    default
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    """
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    def send_on_commit(self, recipients, msg):
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        SendMailOp(self._cw, recipients=recipients, msg=msg)
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    send = send_on_commit
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class StatusChangeMixIn(object):
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    __regid__ = 'notif_status_change'
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    msgid_timestamp = True
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    message = _('status changed')
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    content = _("""
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%(user)s changed status from <%(previous_state)s> to <%(current_state)s> for entity
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'%(title)s'
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%(comment)s
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url: %(url)s
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""")
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###############################################################################
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# Actual notification views.                                                  #
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#                                                                             #
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# disable them at the recipients_finder level if you don't want them          #
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###############################################################################
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# XXX should be based on dc_title/dc_description, no?
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class ContentAddedView(NotificationView):
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    """abstract class for notification on entity/relation
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    all you have to do by default is :
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    * set id and __select__ attributes to match desired events and entity types
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    * set a content attribute to define the content of the email (unless you
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      override call)
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    """
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    __abstract__ = True
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    __regid__ = 'notif_after_add_entity'
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    msgid_timestamp = False
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    message = _('new')
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    content = """
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%(title)s
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%(content)s
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url: %(url)s
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"""
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    def context(self, **kwargs):
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        entity = self.cw_rset.get_entity(self.cw_row or 0, self.cw_col or 0)
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        content = entity.printable_value(self.content_attr, format='text/plain')
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        if content:
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            contentformat = getattr(entity, self.content_attr + '_format',
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                                    'text/rest')
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            # XXX don't try to wrap rest until we've a proper transformation (see
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            # #103822)
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            if contentformat != 'text/rest':
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                content = normalize_text(content, 80)
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        return super(ContentAddedView, self).context(content=content, **kwargs)
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    def subject(self):
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        entity = self.cw_rset.get_entity(self.cw_row or 0, self.cw_col or 0)
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        return  u'%s #%s (%s)' % (self._cw.__('New %s' % entity.e_schema),
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                                  entity.eid, self.user_data['login'])
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def format_value(value):
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    if isinstance(value, unicode):
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        return u'"%s"' % value
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    return value
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class EntityUpdatedNotificationView(NotificationView):
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    """abstract class for notification on entity/relation
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    all you have to do by default is :
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    * set id and __select__ attributes to match desired events and entity types
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    * set a content attribute to define the content of the email (unless you
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      override call)
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    """
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    __abstract__ = True
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    id = 'notif_entity_updated'
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    msgid_timestamp = False
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    message = _('updated')
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    no_detailed_change_attrs = ()
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    content = """
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Properties have been updated by %(user)s:
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%(changes)s
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url: %(url)s
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"""
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    def context(self, **kwargs):
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        context = super(EntityUpdatedNotificationView, self).context(**kwargs)
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        changes = self._cw.transaction_data['changes'][self.cw_rset[0][0]]
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        _ = self._cw._
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        formatted_changes = []
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        entity = self.cw_rset.get_entity(self.cw_row or 0, self.cw_col or 0)
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        for attr, oldvalue, newvalue in sorted(changes):
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            # check current user has permission to see the attribute
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            rschema = self._cw.vreg.schema[attr]
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            if rschema.final:
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                rdef = entity.e_schema.rdef(rschema)
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                if not rdef.has_perm(self._cw, 'read', eid=self.cw_rset[0][0]):
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                    continue
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            # XXX suppose it's a subject relation...
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            elif not rschema.has_perm(self._cw, 'read', fromeid=self.cw_rset[0][0]): # XXX toeid
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                continue
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            if attr in self.no_detailed_change_attrs:
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                msg = _('%s updated') % _(attr)
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            elif oldvalue not in (None, ''):
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                msg = _('%(attr)s updated from %(oldvalue)s to %(newvalue)s') % {
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                    'attr': _(attr),
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                    'oldvalue': format_value(oldvalue),
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                    'newvalue': format_value(newvalue)}
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            else:
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                msg = _('%(attr)s set to %(newvalue)s') % {
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                    'attr': _(attr), 'newvalue': format_value(newvalue)}
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            formatted_changes.append('* ' + msg)
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        if not formatted_changes:
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            # current user isn't allowed to see changes, skip this notification
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            raise SkipEmail()
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        context['changes'] = '\n'.join(formatted_changes)
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        return context
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    def subject(self):
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        entity = self.cw_rset.get_entity(self.cw_row or 0, self.cw_col or 0)
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        return  u'%s #%s (%s)' % (self._cw.__('Updated %s' % entity.e_schema),
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                                  entity.eid, self.user_data['login'])
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from logilab.common.deprecation import class_renamed, class_moved, deprecated
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from cubicweb.hooks.notification import RenderAndSendNotificationView
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from cubicweb.mail import parse_message_id
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NormalizedTextView = class_renamed('NormalizedTextView', ContentAddedView)
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RenderAndSendNotificationView = class_moved(RenderAndSendNotificationView)
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parse_message_id = deprecated('parse_message_id is now defined in cubicweb.mail')(parse_message_id)
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