author | Sylvain Thénault <sylvain.thenault@logilab.fr> |
Mon, 12 Apr 2010 15:15:00 +0200 | |
branch | stable |
changeset 5217 | 08e7fa906cdb |
parent 4993 | c9229f185690 |
child 5174 | 78438ad513ca |
child 5421 | 8167de96c523 |
permissions | -rw-r--r-- |
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"""some hooks to handle notification on entity's changes |
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|
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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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from logilab.common.textutils import normalize_text |
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from cubicweb.selectors import implements |
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from cubicweb.server import hook |
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from cubicweb.sobjects.supervising import SupervisionMailOp |
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class RenderAndSendNotificationView(hook.Operation): |
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"""delay rendering of notification view until precommit""" |
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def precommit_event(self): |
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view = self.view |
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if view.cw_rset is not None and not view.cw_rset: |
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return # entity added and deleted in the same transaction (cache effect) |
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if view.cw_rset and self.session.deleted_in_transaction(view.cw_rset[view.cw_row or 0][view.cw_col or 0]): |
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return # entity added and deleted in the same transaction |
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self.view.render_and_send(**getattr(self, 'viewargs', {})) |
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class NotificationHook(hook.Hook): |
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__abstract__ = True |
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category = 'notification' |
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def select_view(self, vid, rset, row=0, col=0): |
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return self._cw.vreg['views'].select_or_none(vid, self._cw, rset=rset, |
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row=row, col=col) |
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class StatusChangeHook(NotificationHook): |
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"""notify when a workflowable entity has its state modified""" |
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__regid__ = 'notifystatuschange' |
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__select__ = NotificationHook.__select__ & implements('TrInfo') |
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events = ('after_add_entity',) |
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def __call__(self): |
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entity = self.entity |
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if not entity.from_state: # not a transition |
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return |
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rset = entity.related('wf_info_for') |
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view = self.select_view('notif_status_change', rset=rset, row=0) |
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if view is None: |
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return |
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comment = entity.printable_value('comment', format='text/plain') |
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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 comment and entity.comment_format != 'text/rest': |
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comment = normalize_text(comment, 80) |
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RenderAndSendNotificationView(self._cw, view=view, viewargs={ |
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'comment': comment, 'previous_state': entity.previous_state.name, |
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'current_state': entity.new_state.name}) |
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class RelationChangeHook(NotificationHook): |
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__regid__ = 'notifyrelationchange' |
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events = ('before_add_relation', 'after_add_relation', |
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'before_delete_relation', 'after_delete_relation') |
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def __call__(self): |
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"""if a notification view is defined for the event, send notification |
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email defined by the view |
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""" |
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rset = self._cw.eid_rset(self.eidfrom) |
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view = self.select_view('notif_%s_%s' % (self.event, self.rtype), |
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rset=rset, row=0) |
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if view is None: |
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return |
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RenderAndSendNotificationView(self._cw, view=view) |
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class EntityChangeHook(NotificationHook): |
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"""if a notification view is defined for the event, send notification |
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email defined by the view |
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""" |
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__regid__ = 'notifyentitychange' |
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events = ('after_add_entity', 'after_update_entity') |
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def __call__(self): |
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rset = self.entity.as_rset() |
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view = self.select_view('notif_%s' % self.event, rset=rset, row=0) |
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if view is None: |
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return |
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RenderAndSendNotificationView(self._cw, view=view) |
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class EntityUpdatedNotificationOp(hook.SingleLastOperation): |
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def precommit_event(self): |
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session = self.session |
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for eid in session.transaction_data['changes']: |
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view = session.vreg['views'].select('notif_entity_updated', session, |
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rset=session.eid_rset(eid), |
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99 |
row=0) |
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RenderAndSendNotificationView(session, view=view) |
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101 |
|
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102 |
|
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class EntityUpdateHook(NotificationHook): |
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__regid__ = 'notifentityupdated' |
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__abstract__ = True # do not register by default |
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__select__ = NotificationHook.__select__ & hook.from_dbapi_query() |
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events = ('before_update_entity',) |
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skip_attrs = set() |
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109 |
|
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def __call__(self): |
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session = self._cw |
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if session.added_in_transaction(self.entity.eid): |
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return # entity is being created |
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# then compute changes |
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attrs = [k for k in self.entity.edited_attributes |
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if not k in self.skip_attrs] |
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if not attrs: |
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return |
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changes = session.transaction_data.setdefault('changes', {}) |
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thisentitychanges = changes.setdefault(self.entity.eid, set()) |
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121 |
rqlsel, rqlrestr = [], ['X eid %(x)s'] |
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for i, attr in enumerate(attrs): |
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var = chr(65+i) |
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rqlsel.append(var) |
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rqlrestr.append('X %s %s' % (attr, var)) |
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rql = 'Any %s WHERE %s' % (','.join(rqlsel), ','.join(rqlrestr)) |
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rset = session.execute(rql, {'x': self.entity.eid}, 'x') |
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128 |
for i, attr in enumerate(attrs): |
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129 |
oldvalue = rset[0][i] |
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newvalue = self.entity[attr] |
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if oldvalue != newvalue: |
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thisentitychanges.add((attr, oldvalue, newvalue)) |
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if thisentitychanges: |
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134 |
EntityUpdatedNotificationOp(session) |
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135 |
|
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136 |
|
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# supervising ################################################################## |
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138 |
|
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139 |
class SomethingChangedHook(NotificationHook): |
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__regid__ = 'supervising' |
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__select__ = NotificationHook.__select__ & hook.from_dbapi_query() |
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142 |
events = ('before_add_relation', 'before_delete_relation', |
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143 |
'after_add_entity', 'before_update_entity') |
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144 |
|
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145 |
def __call__(self): |
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146 |
dest = self._cw.vreg.config['supervising-addrs'] |
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147 |
if not dest: # no supervisors, don't do this for nothing... |
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148 |
return |
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149 |
if self._call(): |
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150 |
SupervisionMailOp(self._cw) |
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151 |
|
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152 |
def _call(self): |
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153 |
event = self.event.split('_', 1)[1] |
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154 |
if event == 'update_entity': |
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155 |
if self._cw.added_in_transaction(self.entity.eid): |
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156 |
return False |
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157 |
if self.entity.e_schema == 'CWUser': |
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158 |
if not (self.entity.edited_attributes - frozenset(('eid', 'modification_date', |
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159 |
'last_login_time'))): |
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160 |
# don't record last_login_time update which are done |
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161 |
# automatically at login time |
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162 |
return False |
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163 |
self._cw.transaction_data.setdefault('pendingchanges', []).append( |
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164 |
(event, self)) |
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165 |
return True |
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166 |
|
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167 |
|
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168 |
class EntityDeleteHook(SomethingChangedHook): |
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169 |
__regid__ = 'supervisingentitydel' |
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170 |
events = ('before_delete_entity',) |
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171 |
|
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172 |
def _call(self): |
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173 |
try: |
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174 |
title = self.entity.dc_title() |
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175 |
except: |
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176 |
# may raise an error during deletion process, for instance due to |
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177 |
# missing required relation |
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178 |
title = '#%s' % eid |
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179 |
self._cw.transaction_data.setdefault('pendingchanges', []).append( |
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180 |
('delete_entity', (self.entity.eid, str(self.entity.e_schema), title))) |
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181 |
return True |