+
−from cubicweb import ValidationError
+
−from cubicweb.selectors import is_instance
+
−from cubicweb.server import hook
+
−
+
−class SourceHook(hook.Hook):
+
−    __abstract__ = True
+
−    category = 'cw.sources'
+
−
+
−
+
−class SourceAddedOp(hook.Operation):
+
−    def precommit_event(self):
+
−        self.session.repo.add_source(self.entity)
+
−
+
−class SourceAddedHook(SourceHook):
+
−    __regid__ = 'cw.sources.added'
+
−    __select__ = SourceHook.__select__ & is_instance('CWSource')
+
−    events = ('after_add_entity',)
+
−    def __call__(self):
+
−        SourceAddedOp(self._cw, entity=self.entity)
+
−
+
−
+
−class SourceRemovedOp(hook.Operation):
+
−    def precommit_event(self):
+
−        self.session.repo.remove_source(self.uri)
+
−
+
−class SourceRemovedHook(SourceHook):
+
−    __regid__ = 'cw.sources.removed'
+
−    __select__ = SourceHook.__select__ & is_instance('CWSource')
+
−    events = ('before_delete_entity',)
+
−    def __call__(self):
+
−        if self.entity.name == 'system':
+
−            raise ValidationError(self.entity.eid, {None: 'cant remove system source'})
+
−        SourceRemovedOp(self._cw, uri=self.entity.name)