dataobject.py 5.73 KB
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# copyright 2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr -- mailto:contact@logilab.fr
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.
"""cubicweb-seda views for data objects (BinaryDataObject / PhysicalDataObject)"""

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import json

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from cubicweb.predicates import match_form_params, is_instance
from cubicweb.web.views import uicfg, tabs
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from cubes.relationwidget import views as rwdg

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from cubes.seda.xsd2yams import RDEF_CONSTRAINTS
from cubes.seda.views import rtags_from_xsd_element
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_ = unicode

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affk = uicfg.autoform_field_kwargs

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def _container_eid(entity):
    """Attempt to return the container eid from the entity, handling case where entity is being
    created and container information will be find through linkto or parent form (partially
    supported)
    """
    if entity.has_eid():
        # entity is expected to be a contained entity, not the container itself
        container = entity.cw_adapt_to('IContained').container
    else:
        # but parent entity, retrieved through linkto, may be the container itself or a
        # contained entity
        try:
            parent_eid = int(entity._cw.form['__linkto'].split(':')[1])
        except KeyError:
            # ajax created form
            try:
                parent_eid = int(json.loads(entity._cw.form['arg'][0]))
            except ValueError:
                # unable to get parent eid for now :()
                return None
        parent = entity._cw.entity_from_eid(parent_eid)
        icontainer = parent.cw_adapt_to('IContainer')
        if icontainer is None:
            container = parent.cw_adapt_to('IContained').container
        else:
            container = icontainer.container
    return container.eid


class ContainedRelationFacetWidget(rwdg.RelationFacetWidget):

    def trigger_search_url(self, entity, url_params):
        """Overriden to add information about who is the container

        This information will be used later for proper vocabulary computation.
        """
        # first retrieve the container entity
        container_eid = _container_eid(entity)
        # and put it as an extra url param
        if container_eid is not None:
            url_params['container'] = unicode(container_eid)
        return super(ContainedRelationFacetWidget, self).trigger_search_url(entity, url_params)


class ContainedSearchForRelatedEntitiesView(rwdg.SearchForRelatedEntitiesView):
    __select__ = rwdg.SearchForRelatedEntitiesView.__select__ & match_form_params('container')

    def linkable_rset(self):
        """Return rset of entities to be displayed as possible values for the
        edited relation. You may want to override this.
        """
        entity = self.compute_entity()
        rtype, tetype, role = self.rdef
        rdef = entity.e_schema.rdef(rtype, role, tetype)
        assert len(rdef.constraints) == 1 and 'S container AT' in rdef.constraints[0].expression
        baserql = rdef.constraints[0].expression
        baserql.replace('S container AT', 'AT eid %(at)s')
        rql = 'Any O WHERE ' + baserql
        return self._cw.execute(rql, {'at': int(self._cw.form['container'])})


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def uri_cardinality_vocabulary(form, field):
    req = form._cw
    try:
        # inlined creation form
        parent_type = json.loads(req.form['arg'][1])
    except KeyError:
        # edition through reledit
        parent_eid = req.form['eid']
        parent_type = req.describe(int(parent_eid))[0]
    if parent_type in ('SEDABinaryDataObject', 'SEDAAltBinaryDataObjectAttachment'):
        return [u'1']
    return [u'0..1', u'1']

affk.tag_attribute(('SEDAUri', 'user_cardinality'),
                   {'choices': uri_cardinality_vocabulary})


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for key, rql_expr in RDEF_CONSTRAINTS.items():
    if 'S container AT' in rql_expr:
        try:
            etype, rtype = key
        except ValueError:
            etype = '*'
            rtype = key
        affk.tag_subject_of((etype, rtype, '*'),
                            {'widget': ContainedRelationFacetWidget(dialog_options={'width': 800})})
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class BinaryDataObjectTabbedPrimaryView(tabs.TabbedPrimaryView):
    __select__ = tabs.TabbedPrimaryView.__select__ & is_instance('SEDABinaryDataObject')
    tabs = [
        'main_tab',
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        _('seda_bdo_format_identification'),
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        _('seda_bdo_file_information'),
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    ]


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class BinaryDataObjectFormatIdentificationTab(tabs.PrimaryTab):
    """Display format identification information of a binary data object"""
    __regid__ = 'seda_bdo_format_identification'
    __select__ = tabs.PrimaryTab.__select__ & is_instance('SEDABinaryDataObject')

    rsection, display_ctrl = rtags_from_xsd_element('SEDABinaryDataObject', 'FormatIdentification')


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class BinaryDataObjectFileInfoTab(tabs.PrimaryTab):
    """Display file information of a binary data object"""
    __regid__ = 'seda_bdo_file_information'
    __select__ = tabs.PrimaryTab.__select__ & is_instance('SEDABinaryDataObject')

    rsection, display_ctrl = rtags_from_xsd_element('SEDABinaryDataObject', 'FileInfo')


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class PhysicalDataObjectTabbedPrimaryView(tabs.TabbedPrimaryView):
    __select__ = tabs.TabbedPrimaryView.__select__ & is_instance('SEDAPhysicalDataObject')
    tabs = [
        'main_tab',
    ]