entities/adapters.py
author Julien Jehannet <julien.jehannet@logilab.fr>
Tue, 01 Jun 2010 17:09:22 +0200
changeset 5674 9378d13e9ac4
parent 5574 e082a57c2207
child 5694 ce2c108a9595
permissions -rw-r--r--
[web test] Add windmill functional testing capability.
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# copyright 2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
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"""some basic entity adapter implementations, for interfaces used in the
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framework itself.
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"""
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__docformat__ = "restructuredtext en"
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from cubicweb.view import EntityAdapter, implements_adapter_compat
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from cubicweb.selectors import implements, relation_possible
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from cubicweb.interfaces import IDownloadable
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class IEmailableAdapter(EntityAdapter):
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    __regid__ = 'IEmailable'
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    __select__ = relation_possible('primary_email') | relation_possible('use_email')
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    def get_email(self):
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        if getattr(self.entity, 'primary_email', None):
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            return self.entity.primary_email[0].address
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        if getattr(self.entity, 'use_email', None):
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            return self.entity.use_email[0].address
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        return None
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    def allowed_massmail_keys(self):
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        """returns a set of allowed email substitution keys
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        The default is to return the entity's attribute list but you might
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        override this method to allow extra keys.  For instance, a Person
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        class might want to return a `companyname` key.
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        """
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        return set(rschema.type
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                   for rschema, attrtype in self.entity.e_schema.attribute_definitions()
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                   if attrtype.type not in ('Password', 'Bytes'))
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    def as_email_context(self):
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        """returns the dictionary as used by the sendmail controller to
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        build email bodies.
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        NOTE: the dictionary keys should match the list returned by the
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        `allowed_massmail_keys` method.
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        """
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        return dict( (attr, getattr(self.entity, attr))
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                     for attr in self.allowed_massmail_keys() )
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class INotifiableAdapter(EntityAdapter):
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    __regid__ = 'INotifiable'
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    __select__ = implements('Any')
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    @implements_adapter_compat('INotifiableAdapter')
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    def notification_references(self, view):
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        """used to control References field of email send on notification
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        for this entity. `view` is the notification view.
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        Should return a list of eids which can be used to generate message
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        identifiers of previously sent email(s)
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        """
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        itree = self.entity.cw_adapt_to('ITree')
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        if itree is not None:
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            return itree.path()[:-1]
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        return ()
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class IFTIndexableAdapter(EntityAdapter):
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    __regid__ = 'IFTIndexable'
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    __select__ = implements('Any')
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    def fti_containers(self, _done=None):
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        if _done is None:
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            _done = set()
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        entity = self.entity
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        _done.add(entity.eid)
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        containers = tuple(entity.e_schema.fulltext_containers())
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        if containers:
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            for rschema, target in containers:
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                if target == 'object':
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                    targets = getattr(entity, rschema.type)
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                else:
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                    targets = getattr(entity, 'reverse_%s' % rschema)
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                for entity in targets:
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                    if entity.eid in _done:
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                        continue
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                    for container in entity.cw_adapt_to('IFTIndexable').fti_containers(_done):
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                        yield container
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                        yielded = True
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        else:
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            yield entity
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    def get_words(self):
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        """used by the full text indexer to get words to index
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        this method should only be used on the repository side since it depends
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        on the logilab.database package
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        :rtype: list
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        :return: the list of indexable word of this entity
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        """
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        from logilab.database.fti import tokenize
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        # take care to cases where we're modyfying the schema
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        entity = self.entity
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        pending = self._cw.transaction_data.setdefault('pendingrdefs', set())
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        words = []
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        for rschema in entity.e_schema.indexable_attributes():
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            if (entity.e_schema, rschema) in pending:
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                continue
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            try:
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                value = entity.printable_value(rschema, format='text/plain')
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            except TransformError:
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                continue
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            except:
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                self.exception("can't add value of %s to text index for entity %s",
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                               rschema, entity.eid)
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                continue
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            if value:
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                words += tokenize(value)
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        for rschema, role in entity.e_schema.fulltext_relations():
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            if role == 'subject':
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                for entity_ in getattr(entity, rschema.type):
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                    words += entity_.cw_adapt_to('IFTIndexable').get_words()
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            else: # if role == 'object':
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                for entity_ in getattr(entity, 'reverse_%s' % rschema.type):
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                    words += entity_.cw_adapt_to('IFTIndexable').get_words()
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        return words
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class IDownloadableAdapter(EntityAdapter):
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    """interface for downloadable entities"""
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    __regid__ = 'IDownloadable'
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    __select__ = implements(IDownloadable) # XXX for bw compat, else should be abstract
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    @implements_adapter_compat('IDownloadable')
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    def download_url(self): # XXX not really part of this interface
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        """return an url to download entity's content"""
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        raise NotImplementedError
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    @implements_adapter_compat('IDownloadable')
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    def download_content_type(self):
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        """return MIME type of the downloadable content"""
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        raise NotImplementedError
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    @implements_adapter_compat('IDownloadable')
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    def download_encoding(self):
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        """return encoding of the downloadable content"""
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        raise NotImplementedError
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    @implements_adapter_compat('IDownloadable')
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    def download_file_name(self):
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        """return file name of the downloadable content"""
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        raise NotImplementedError
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    @implements_adapter_compat('IDownloadable')
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    def download_data(self):
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        """return actual data of the downloadable content"""
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        raise NotImplementedError