author | Sylvain Thénault <sylvain.thenault@logilab.fr> |
Fri, 13 Nov 2009 14:14:48 +0100 | |
branch | stable |
changeset 3842 | 66f3ed1703d0 |
parent 3136 | ed303cf3a048 |
child 3163 | edfe43ceaa35 |
child 4212 | ab6573088b4a |
permissions | -rw-r--r-- |
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"""some hooks and views to handle supervising of any data changes |
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:organization: Logilab |
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:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2. |
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr |
1977
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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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from cubicweb import UnknownEid |
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from cubicweb.selectors import none_rset |
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from cubicweb.schema import display_name |
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from cubicweb.view import Component |
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from cubicweb.common.mail import format_mail |
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from cubicweb.server.hooksmanager import Hook |
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from cubicweb.server.hookhelper import SendMailOp |
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class SomethingChangedHook(Hook): |
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events = ('before_add_relation', 'before_delete_relation', |
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'after_add_entity', 'before_update_entity') |
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accepts = ('Any',) |
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def call(self, session, *args): |
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if session.is_super_session or session.repo.config.repairing: |
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return # ignore changes triggered by hooks or maintainance shell |
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dest = self.config['supervising-addrs'] |
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if not dest: # no supervisors, don't do this for nothing... |
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return |
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self.session = session |
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if self._call(*args): |
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SupervisionMailOp(session) |
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def _call(self, *args): |
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if self._event() == 'update_entity': |
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if args[0].eid in self.session.transaction_data.get('neweids', ()): |
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return False |
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if args[0].e_schema == 'CWUser': |
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updated = set(args[0].iterkeys()) |
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if not (updated - frozenset(('eid', 'modification_date', |
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'last_login_time'))): |
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# don't record last_login_time update which are done |
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# automatically at login time |
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return False |
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self.session.transaction_data.setdefault('pendingchanges', []).append( |
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(self._event(), args)) |
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return True |
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def _event(self): |
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return self.event.split('_', 1)[1] |
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class EntityDeleteHook(SomethingChangedHook): |
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events = ('before_delete_entity',) |
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def _call(self, eid): |
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entity = self.session.entity_from_eid(eid) |
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try: |
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title = entity.dc_title() |
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except: |
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# may raise an error during deletion process, for instance due to |
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# missing required relation |
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title = '#%s' % eid |
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self.session.transaction_data.setdefault('pendingchanges', []).append( |
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('delete_entity', (eid, str(entity.e_schema), title))) |
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return True |
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def filter_changes(changes): |
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""" |
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* when an entity has been deleted: |
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* don't show deletion of its relations |
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* don't show related TrInfo deletion if any |
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* when an entity has been added don't show owned_by relation addition |
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* don't show new TrInfo entities if any |
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""" |
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# first build an index of changes |
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index = {} |
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added, deleted = set(), set() |
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for change in changes[:]: |
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event, changedescr = change |
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if event == 'add_entity': |
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entity = changedescr[0] |
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added.add(entity.eid) |
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if entity.e_schema == 'TrInfo': |
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changes.remove(change) |
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event = 'change_state' |
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change = (event, |
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(entity.wf_info_for[0], |
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entity.from_state[0], entity.to_state[0])) |
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changes.append(change) |
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elif event == 'delete_entity': |
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deleted.add(changedescr[0]) |
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index.setdefault(event, set()).add(change) |
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for key in ('delete_relation', 'add_relation'): |
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for change in index.get(key, {}).copy(): |
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if change[1][1] == 'in_state': |
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index[key].remove(change) |
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# filter changes |
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for eid in added: |
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try: |
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for change in index['add_relation'].copy(): |
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changedescr = change[1] |
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# skip meta-relations which are set automatically |
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# XXX generate list below using rtags (category = 'generated') |
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if changedescr[1] in ('created_by', 'owned_by', 'is', 'is_instance_of', |
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'from_state', 'to_state', 'by_transition', |
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'wf_info_for') \ |
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and changedescr[0] == eid: |
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index['add_relation'].remove(change) |
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except KeyError: |
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break |
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for eid in deleted: |
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try: |
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for change in index['delete_relation'].copy(): |
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fromeid, rtype, toeid = change[1] |
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if fromeid == eid: |
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index['delete_relation'].remove(change) |
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elif toeid == eid: |
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index['delete_relation'].remove(change) |
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if rtype == 'wf_info_for': |
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for change in index['delete_entity'].copy(): |
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if change[1][0] == fromeid: |
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index['delete_entity'].remove(change) |
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except KeyError: |
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break |
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for change in changes: |
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event, changedescr = change |
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if change in index[event]: |
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yield change |
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class SupervisionEmailView(Component): |
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"""view implementing the email API for data changes supervision notification |
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""" |
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__select__ = none_rset() |
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id = 'supervision_notif' |
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def recipients(self): |
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return self.config['supervising-addrs'] |
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def subject(self): |
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return self.req._('[%s supervision] changes summary') % self.config.appid |
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def call(self, changes): |
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user = self.req.actual_session().user |
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self.w(self.req._('user %s has made the following change(s):\n\n') |
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% user.login) |
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for event, changedescr in filter_changes(changes): |
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self.w(u'* ') |
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getattr(self, event)(*changedescr) |
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self.w(u'\n\n') |
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def _entity_context(self, entity): |
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return {'eid': entity.eid, |
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'etype': entity.dc_type().lower(), |
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'title': entity.dc_title()} |
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def add_entity(self, entity): |
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msg = self.req._('added %(etype)s #%(eid)s (%(title)s)') |
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self.w(u'%s\n' % (msg % self._entity_context(entity))) |
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self.w(u' %s' % entity.absolute_url()) |
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def update_entity(self, entity): |
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msg = self.req._('updated %(etype)s #%(eid)s (%(title)s)') |
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self.w(u'%s\n' % (msg % self._entity_context(entity))) |
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# XXX print changes |
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self.w(u' %s' % entity.absolute_url()) |
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def delete_entity(self, eid, etype, title): |
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msg = self.req._('deleted %(etype)s #%(eid)s (%(title)s)') |
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etype = display_name(self.req, etype).lower() |
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self.w(msg % locals()) |
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def change_state(self, entity, fromstate, tostate): |
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msg = self.req._('changed state of %(etype)s #%(eid)s (%(title)s)') |
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self.w(u'%s\n' % (msg % self._entity_context(entity))) |
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self.w(_(' from state %(fromstate)s to state %(tostate)s\n' % |
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{'fromstate': _(fromstate.name), 'tostate': _(tostate.name)})) |
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self.w(u' %s' % entity.absolute_url()) |
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def _relation_context(self, fromeid, rtype, toeid): |
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_ = self.req._ |
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session = self.req.actual_session() |
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def describe(eid): |
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try: |
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return _(session.describe(eid)[0]).lower() |
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except UnknownEid: |
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# may occurs when an entity has been deleted from an external |
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# source and we're cleaning its relation |
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return _('unknown external entity') |
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return {'rtype': _(rtype), |
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'fromeid': fromeid, |
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'frometype': describe(fromeid), |
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'toeid': toeid, |
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'toetype': describe(toeid)} |
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def add_relation(self, fromeid, rtype, toeid): |
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msg = self.req._('added relation %(rtype)s from %(frometype)s #%(fromeid)s to %(toetype)s #%(toeid)s') |
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self.w(msg % self._relation_context(fromeid, rtype, toeid)) |
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def delete_relation(self, fromeid, rtype, toeid): |
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msg = self.req._('deleted relation %(rtype)s from %(frometype)s #%(fromeid)s to %(toetype)s #%(toeid)s') |
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self.w(msg % self._relation_context(fromeid, rtype, toeid)) |
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class SupervisionMailOp(SendMailOp): |
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"""special send email operation which should be done only once for a bunch |
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of changes |
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""" |
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def _get_view(self): |
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return self.session.vreg['components'].select('supervision_notif', |
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self.session) |
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def _prepare_email(self): |
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session = self.session |
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config = session.vreg.config |
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uinfo = {'email': config['sender-addr'], |
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'name': config['sender-name']} |
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view = self._get_view() |
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content = view.render(changes=session.transaction_data.get('pendingchanges')) |
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recipients = view.recipients() |
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msg = format_mail(uinfo, recipients, content, view.subject(), config=config) |
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self.to_send = [(msg, recipients)] |
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def commit_event(self): |
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self._prepare_email() |
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SendMailOp.commit_event(self) |