Add modules to list and to index to have docstring integrated into the documentation.
Needs to be completed. Sphinx required to explicitely list which modules we want to include in the documentation.
"""abstract controler classe for CubicWeb web client
:organization: Logilab
:copyright: 2001-2008 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
"""
__docformat__ = "restructuredtext en"
from mx.DateTime import strptime, Error as MxDTError, TimeDelta
from cubicweb import typed_eid
from cubicweb.common.registerers import priority_registerer
from cubicweb.common.selectors import in_group_selector
from cubicweb.common.appobject import AppObject
from cubicweb.web import LOGGER, Redirect, RequestError
NAVIGATION_PARAMETERS = (('vid', '__redirectvid'),
('rql', '__redirectrql'),
('__redirectpath', '__redirectpath'),
('__redirectparams', '__redirectparams'),
)
NAV_FORM_PARAMETERS = [fp for ap, fp in NAVIGATION_PARAMETERS]
def redirect_params(form):
"""transform redirection parameters into navigation parameters
"""
params = {}
# extract navigation parameters from redirection parameters
for navparam, redirectparam in NAVIGATION_PARAMETERS:
if navparam == redirectparam:
continue
if redirectparam in form:
params[navparam] = form[redirectparam]
return params
def parse_relations_descr(rdescr):
"""parse a string describing some relations, in the form
subjeids:rtype:objeids
where subjeids and objeids are eids separeted by a underscore
return an iterator on (subject eid, relation type, object eid) found
"""
for rstr in rdescr:
subjs, rtype, objs = rstr.split(':')
for subj in subjs.split('_'):
for obj in objs.split('_'):
yield typed_eid(subj), rtype, typed_eid(obj)
def append_url_params(url, params):
"""append raw parameters to the url. Given parameters, if any, are expected
to be already url-quoted.
"""
if params:
if not '?' in url:
url += '?'
else:
url += '&'
url += params
return url
class Controller(AppObject):
"""a controller is responsible to make necessary stuff to publish
a request. There is usually at least one standard "view" controller
and another linked by forms to edit objects ("edit").
"""
__registry__ = 'controllers'
__registerer__ = priority_registerer
__selectors__ = (in_group_selector,)
require_groups = ()
def __init__(self, *args, **kwargs):
super(Controller, self).__init__(*args, **kwargs)
# attributes use to control after edition redirection
self._after_deletion_path = None
self._edited_entity = None
def publish(self, rset=None):
"""publish the current request, with an option input rql string
(already processed if necessary)
"""
raise NotImplementedError
# generic methods useful for concret implementations ######################
def check_expected_params(self, params):
"""check that the given list of parameters are specified in the form
dictionary
"""
missing = []
for param in params:
if not self.req.form.get(param):
missing.append(param)
if missing:
raise RequestError('missing required parameter(s): %s'
% ','.join(missing))
def parse_datetime(self, value, etype='Datetime'):
"""get a datetime or time from a string (according to etype)
Datetime formatted as Date are accepted
"""
assert etype in ('Datetime', 'Date', 'Time'), etype
# XXX raise proper validation error
if etype == 'Datetime':
format = self.req.property_value('ui.datetime-format')
try:
return strptime(value, format)
except MxDTError:
pass
elif etype == 'Time':
format = self.req.property_value('ui.time-format')
try:
# (adim) I can't find a way to parse a Time with a custom format
date = strptime(value, format) # this returns a DateTime
return TimeDelta(date.hour, date.minute, date.second)
except MxDTError:
raise ValueError('can\'t parse %r (expected %s)' % (value, format))
try:
format = self.req.property_value('ui.date-format')
return strptime(value, format)
except MxDTError:
raise ValueError('can\'t parse %r (expected %s)' % (value, format))
def notify_edited(self, entity):
"""called by edit_entity() to notify which entity is edited"""
# NOTE: we can't use entity.rest_path() at this point because
# rest_path() could rely on schema constraints (such as a required
# relation) that might not be satisfied yet (in case of creations)
if not self._edited_entity:
self._edited_entity = entity
def delete_entities(self, eidtypes):
"""delete entities from the repository"""
redirect_info = set()
eidtypes = tuple(eidtypes)
for eid, etype in eidtypes:
entity = self.req.eid_rset(eid, etype).get_entity(0, 0)
path, params = entity.after_deletion_path()
redirect_info.add( (path, tuple(params.iteritems())) )
entity.delete()
if len(redirect_info) > 1:
# In the face of ambiguity, refuse the temptation to guess.
self._after_deletion_path = 'view', ()
else:
self._after_deletion_path = iter(redirect_info).next()
if len(eidtypes) > 1:
self.req.set_message(self.req._('entities deleted'))
else:
self.req.set_message(self.req._('entity deleted'))
def delete_relations(self, rdefs):
"""delete relations from the repository"""
# FIXME convert to using the syntax subject:relation:eids
execute = self.req.execute
for subj, rtype, obj in rdefs:
rql = 'DELETE X %s Y where X eid %%(x)s, Y eid %%(y)s' % rtype
execute(rql, {'x': subj, 'y': obj}, ('x', 'y'))
self.req.set_message(self.req._('relations deleted'))
def insert_relations(self, rdefs):
"""insert relations into the repository"""
execute = self.req.execute
for subj, rtype, obj in rdefs:
rql = 'SET X %s Y where X eid %%(x)s, Y eid %%(y)s' % rtype
execute(rql, {'x': subj, 'y': obj}, ('x', 'y'))
def reset(self):
"""reset form parameters and redirect to a view determinated by given
parameters
"""
newparams = {}
# sets message if needed
if self.req.message:
newparams['__message'] = self.req.message
if self.req.form.has_key('__action_apply'):
self._return_to_edition_view(newparams)
if self.req.form.has_key('__action_cancel'):
self._return_to_lastpage(newparams)
else:
self._return_to_original_view(newparams)
def _return_to_original_view(self, newparams):
"""validate-button case"""
# transforms __redirect[*] parameters into regular form parameters
newparams.update(redirect_params(self.req.form))
# find out if we have some explicit `rql` needs
rql = newparams.pop('rql', None)
# if rql is needed (explicit __redirectrql or multiple deletions for
# instance), we have to use the old `view?rql=...` form
if rql:
path = 'view'
newparams['rql'] = rql
elif '__redirectpath' in self.req.form:
# if redirect path was explicitly specified in the form, use it
path = self.req.form['__redirectpath']
elif self._after_deletion_path:
# else it should have been set during form processing
path, params = self._after_deletion_path
params = dict(params) # params given as tuple
params.update(newparams)
newparams = params
elif self._edited_entity:
path = self._edited_entity.rest_path()
else:
path = 'view'
url = self.build_url(path, **newparams)
url = append_url_params(url, self.req.form.get('__redirectparams'))
raise Redirect(url)
def _return_to_edition_view(self, newparams):
"""apply-button case"""
form = self.req.form
if self._edited_entity:
path = self._edited_entity.rest_path()
newparams.pop('rql', None)
# else, fallback on the old `view?rql=...` url form
elif 'rql' in self.req.form:
path = 'view'
newparams['rql'] = form['rql']
else:
self.warning("the edited data seems inconsistent")
path = 'view'
# pick up the correction edition view
if form.get('__form_id'):
newparams['vid'] = form['__form_id']
# re-insert copy redirection parameters
for redirectparam in NAV_FORM_PARAMETERS:
if redirectparam in form:
newparams[redirectparam] = form[redirectparam]
raise Redirect(self.build_url(path, **newparams))
def _return_to_lastpage(self, newparams):
"""cancel-button case: in this case we are always expecting to go back
where we came from, and this is not easy. Currently we suppose that
__redirectpath is specifying that place if found, else we look in the
request breadcrumbs for the last visited page.
"""
if '__redirectpath' in self.req.form:
# if redirect path was explicitly specified in the form, use it
path = self.req.form['__redirectpath']
url = self.build_url(path, **newparams)
url = append_url_params(url, self.req.form.get('__redirectparams'))
else:
url = self.req.last_visited_page()
raise Redirect(url)
from cubicweb import set_log_methods
set_log_methods(Controller, LOGGER)