# copyright 2010-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb 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.
#
# CubicWeb 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 CubicWeb. If not, see <http://www.gnu.org/licenses/>.
"""Specific views for data sources and related entities (eg CWSource,
CWSourceHostConfig, CWSourceSchemaConfig).
"""
__docformat__ = "restructuredtext en"
_ = unicode
from itertools import repeat, chain
from cubicweb.selectors import is_instance, score_entity, match_user_groups
from cubicweb.view import EntityView, StartupView
from cubicweb.schema import META_RTYPES, VIRTUAL_RTYPES, display_name
from cubicweb.web import uicfg
from cubicweb.web.views import tabs, actions
# source primary views #########################################################
_pvs = uicfg.primaryview_section
_pvs.tag_object_of(('*', 'cw_for_source', 'CWSource'), 'hidden')
class CWSourcePrimaryView(tabs.TabbedPrimaryView):
__select__ = is_instance('CWSource')
tabs = [_('cwsource-main'), _('cwsource-mapping')]
default_tab = 'cwsource-main'
class CWSourceMainTab(tabs.PrimaryTab):
__regid__ = 'cwsource-main'
__select__ = tabs.PrimaryTab.__select__ & is_instance('CWSource')
MAPPED_SOURCE_TYPES = set( ('pyrorql', 'datafeed') )
class CWSourceMappingTab(EntityView):
__regid__ = 'cwsource-mapping'
__select__ = (tabs.PrimaryTab.__select__ & is_instance('CWSource')
& match_user_groups('managers')
& score_entity(lambda x:x.type in MAPPED_SOURCE_TYPES))
def entity_call(self, entity):
_ = self._cw._
self.w('<h3>%s</h3>' % _('Entity and relation supported by this source'))
eschema = self._cw.vreg.schema.eschema('CWSourceSchemaConfig')
if eschema.has_perm(self._cw, 'add'):
self.w(u'<a href="%s" class="addButton right">%s</a>' % (
self._cw.build_url('add/%s' % eschema),
self._cw._('add a CWSourceSchemaConfig')))
self.w(u'<div class="clear"></div>')
rset = self._cw.execute(
'Any X, SCH, XO ORDERBY ET WHERE X options XO, X cw_for_source S, S eid %(s)s, '
'X cw_schema SCH, SCH is ET', {'s': entity.eid})
self.wview('table', rset, 'noresult')
# self.w('<h3>%s</h3>' % _('Relations that should not be crossed'))
# self.w('<p>%s</p>' % _(
# 'By default, when a relation is not supported by a source, it is '
# 'supposed that a local relation may point to an entity from the '
# 'external source. Relations listed here won\'t have this '
# '"crossing" behaviour.'))
# self.wview('list', entity.related('cw_dont_cross'), 'noresult')
# self.w('<h3>%s</h3>' % _('Relations that can be crossed'))
# self.w('<p>%s</p>' % _(
# 'By default, when a relation is supported by a source, it is '
# 'supposed that a local relation can\'t point to an entity from the '
# 'external source. Relations listed here may have this '
# '"crossing" behaviour anyway.'))
# self.wview('list', entity.related('cw_may_cross'), 'noresult')
checker = MAPPING_CHECKERS.get(entity.type, MappingChecker)(entity)
checker.check()
if (checker.errors or checker.warnings or checker.infos):
self.w('<h2>%s</h2>' % _('Detected problems'))
errors = zip(repeat(_('error')), checker.errors)
warnings = zip(repeat(_('warning')), checker.warnings)
infos = zip(repeat(_('warning')), checker.infos)
self.wview('pyvaltable', pyvalue=chain(errors, warnings, infos))
class MappingChecker(object):
def __init__(self, cwsource):
self.cwsource = cwsource
self.errors = []
self.warnings = []
self.infos = []
self.schema = cwsource._cw.vreg.schema
def init(self):
# supported entity types
self.sentities = set()
# supported relations
self.srelations = {}
# avoid duplicated messages
self.seen = set()
# first get mapping as dict/sets
for schemacfg in self.cwsource.reverse_cw_for_source:
self.init_schemacfg(schemacfg)
def init_schemacfg(self, schemacfg):
cwerschema = schemacfg.schema
if cwerschema.__regid__ == 'CWEType':
self.sentities.add(cwerschema.name)
elif cwerschema.__regid__ == 'CWRType':
assert not cwerschema.name in self.srelations
self.srelations[cwerschema.name] = None
else: # CWAttribute/CWRelation
self.srelations.setdefault(cwerschema.rtype.name, []).append(
(cwerschema.stype.name, cwerschema.otype.name) )
def check(self):
self.init()
error = self.errors.append
warning = self.warnings.append
info = self.infos.append
for etype in self.sentities:
eschema = self.schema[etype]
for rschema, ttypes, role in eschema.relation_definitions():
if rschema in META_RTYPES:
continue
ttypes = [ttype for ttype in ttypes if ttype in self.sentities]
if not rschema in self.srelations:
for ttype in ttypes:
rdef = rschema.role_rdef(etype, ttype, role)
self.seen.add(rdef)
if rdef.role_cardinality(role) in '1+':
error(_('relation %(type)s with %(etype)s as %(role)s '
'and target type %(target)s is mandatory but '
'not supported') %
{'rtype': rschema, 'etype': etype, 'role': role,
'target': ttype})
elif ttype in self.sentities:
warning(_('%s could be supported') % rdef)
elif not ttypes:
warning(_('relation %(rtype)s with %(etype)s as %(role)s is '
'supported but no target type supported') %
{'rtype': rschema, 'role': role, 'etype': etype})
for rtype in self.srelations:
rschema = self.schema[rtype]
for subj, obj in rschema.rdefs:
if subj in self.sentities and obj in self.sentities:
break
else:
error(_('relation %s is supported but none if its definitions '
'matches supported entities') % rtype)
self.custom_check()
def custom_check(self):
pass
class PyroRQLMappingChecker(MappingChecker):
"""pyrorql source mapping checker"""
def init(self):
self.dontcross = set()
self.maycross = set()
super(PyroRQLMappingChecker, self).init()
def init_schemacfg(self, schemacfg):
options = schemacfg.options or ()
if 'dontcross' in options:
self.dontcross.add(schemacfg.schema.name)
else:
super(PyroRQLMappingChecker, self).init_schemacfg(schemacfg)
if 'maycross' in options:
self.maycross.add(schemacfg.schema.name)
def custom_check(self):
error = self.errors.append
info = self.infos.append
for etype in self.sentities:
eschema = self.schema[etype]
for rschema, ttypes, role in eschema.relation_definitions():
if rschema in META_RTYPES:
continue
if not rschema in self.srelations:
if rschema not in self.dontcross:
if role == 'subject' and rschema.inlined:
error(_('inlined relation %(rtype)s of %(etype)s '
'should be supported') %
{'rtype': rschema, 'etype': etype})
elif (rschema not in self.seen and rschema not in self.maycross):
info(_('you may want to specify something for %s') %
rschema)
self.seen.add(rschema)
elif rschema in self.maycross and rschema.inlined:
error(_('you should un-inline relation %s which is '
'supported and may be crossed ') % rschema)
MAPPING_CHECKERS = {
'pyrorql': PyroRQLMappingChecker,
}
# sources management view ######################################################
class ManageSourcesAction(actions.ManagersAction):
__regid__ = 'cwsource'
title = _('data sources')
category = 'manage'
class CWSourceManagementView(StartupView):
__regid__ = 'cw.source-management'
rql = ('Any S, ST, SN ORDERBY SN WHERE S is CWSource, S name SN, S type ST')
title = _('data sources management')
def call(self, **kwargs):
self.w('<h1>%s</h1>' % self._cw._(self.title))
eschema = self._cw.vreg.schema.eschema('CWSource')
if eschema.has_perm(self._cw, 'add'):
self.w(u'<a href="%s" class="addButton right">%s</a>' % (
self._cw.build_url('add/%s' % eschema),
self._cw._('add a CWSource')))
self.w(u'<div class="clear"></div>')
self.wview('table', self._cw.execute(self.rql), displaycols=range(2))