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−# copyright 2012 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
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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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−# 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
+
−# details.
+
−#
+
−# 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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−
+
−__docformat__ = "restructuredtext en"
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−_ = unicode
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−
+
−
+
−from logilab.common.registry import Predicate
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−
+
−from cubicweb import UnknownEid, tags, transaction as tx
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−from cubicweb.view import View, StartupView
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−from cubicweb.predicates import match_kwargs, ExpectedValuePredicate
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−from cubicweb.schema import display_name
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−
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−
+
−class undoable_action(Predicate):
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−    """Select only undoable actions depending on filters provided. Undo Action
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−    is expected to be specified by the `tx_action` argument.
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−
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−    Currently the only implemented filter is:
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−
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−    :param action_type: chars among CUDAR (standing for Create, Update, Delete,
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−                        Add, Remove)
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−    """
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−
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−    # XXX FIXME : this selector should be completed to allow selection on the
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−    # entity or relation types and public / private.
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−    def __init__(self, action_type='CUDAR'):
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−        assert not set(action_type) - set('CUDAR')
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−        self.action_type = action_type
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−
+
−    def __str__(self):
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−        return '%s(%s)' % (self.__class__.__name__, ', '.join(
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−            "%s=%v" % (str(k), str(v)) for k, v in kwargs.iteritems() ))
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−
+
−    def __call__(self, cls, req, tx_action=None, **kwargs):
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−        # tx_action is expected to be a transaction.AbstractAction
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−        if not isinstance(tx_action, tx.AbstractAction):
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−            return 0
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−        # Filter according to action type
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−        return int(tx_action.action in self.action_type)
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−
+
−
+
−class UndoHistoryView(StartupView):
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−    __regid__ = 'undohistory'
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−    title = _('Undoing')
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−    item_vid = 'undoable-transaction-view'
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−    cache_max_age = 0
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−
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−    redirect_path = 'view' #TODO
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−    redirect_params = dict(vid='undohistory') #TODO
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−    public_actions_only = True
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−
+
−    # TODO Allow to choose if if want all actions or only the public ones
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−    # (default)
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−
+
−    def call(self, **kwargs):
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−        txs = self._cw.cnx.undoable_transactions()
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−        if txs :
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−            self.w(u"<ul class='undo-transactions'>")
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−            for tx in txs:
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−                self.cell_call(tx)
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−            self.w(u"</ul>")
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−
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−    def cell_call(self, tx):
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−        self.w(u'<li>')
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−        self.wview(self.item_vid, None, txuuid=tx.uuid,
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−                   public=self.public_actions_only,
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−                   redirect_path=self.redirect_path,
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−                   redirect_params=self.redirect_params)
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−        self.w(u'</li>\n')
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−
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−
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−class UndoableTransactionView(View):
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−    __regid__ = 'undoable-transaction-view'
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−    __select__ = View.__select__ & match_kwargs('txuuid')
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−
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−    item_vid = 'undoable-action-list-view'
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−    cache_max_age = 0
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−
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−    def build_undo_link(self, txuuid,
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−                        redirect_path=None, redirect_params=None):
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−        """ the kwargs are passed to build_url"""
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−        _ = self._cw._
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−        redirect = {}
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−        if redirect_path:
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−            redirect['__redirectpath'] = redirect_path
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−        if redirect_params:
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−            if isinstance(redirect_params, dict):
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−                redirect['__redirectparams'] = self._cw.build_url_params(**redirect_params)
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−            else:
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−                redirect['__redirectparams'] = redirect_params
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−        link_url = self._cw.build_url('undo', txuuid=txuuid, **redirect)
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−        msg = u"<span class='undo'>%s</span>" % tags.a( _('undo'), href=link_url)
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−        return msg
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−
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−    def call(self, txuuid, public=True,
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−             redirect_path=None, redirect_params=None):
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−        _ = self._cw._
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−        txinfo = self._cw.cnx.transaction_info(txuuid)
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−        try:
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−            #XXX Under some unknown circumstances txinfo.user_eid=-1
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−            user = self._cw.entity_from_eid(txinfo.user_eid)
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−        except UnknownEid:
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−            user = None
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−        undo_url = self.build_undo_link(txuuid,
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−                                        redirect_path=redirect_path,
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−                                        redirect_params=redirect_params)
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−        txinfo_dict = dict( dt = self._cw.format_date(txinfo.datetime, time=True),
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−                            user_eid = txinfo.user_eid,
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−                            user = user and user.view('outofcontext') or _("undefined user"),
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−                            txuuid = txuuid,
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−                            undo_link = undo_url)
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−        self.w( _("By %(user)s on %(dt)s [%(undo_link)s]") % txinfo_dict)
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−
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−        tx_actions = txinfo.actions_list(public=public)
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−        if tx_actions :
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−            self.wview(self.item_vid, None, tx_actions=tx_actions)
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−
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−
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−class UndoableActionListView(View):
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−    __regid__ = 'undoable-action-list-view'
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−    __select__ = View.__select__ & match_kwargs('tx_actions')
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−    title = _('Undoable actions')
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−    item_vid = 'undoable-action-view'
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−    cache_max_age = 0
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−
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−    def call(self, tx_actions):
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−        if tx_actions :
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−            self.w(u"<ol class='undo-actions'>")
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−            for action in tx_actions:
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−                self.cell_call(action)
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−            self.w(u"</ol>")
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−
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−    def cell_call(self, action):
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−        self.w(u'<li>')
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−        self.wview(self.item_vid, None, tx_action=action)
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−        self.w(u'</li>\n')
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−
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−
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−class UndoableActionBaseView(View):
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−    __regid__ = 'undoable-action-view'
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−    __abstract__ = True
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−
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−    def call(self, tx_action):
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−        raise NotImplementedError(self)
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−
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−    def _build_entity_link(self, eid):
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−        try:
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−            entity = self._cw.entity_from_eid(eid)
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−            return entity.view('outofcontext')
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−        except UnknownEid:
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−            return _("(suppressed) entity #%d") % eid
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−
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−    def _build_relation_info(self, rtype, eid_from,  eid_to):
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−        return dict( rtype=display_name(self._cw, rtype),
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−                     entity_from=self._build_entity_link(eid_from),
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−                     entity_to=self._build_entity_link(eid_to) )
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−
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−    def _build_entity_info(self, etype, eid, changes):
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−        return dict( etype=display_name(self._cw, etype),
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−                     entity=self._build_entity_link(eid),
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−                     eid=eid,
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−                     changes=changes)
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−
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−
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−class UndoableAddActionView(UndoableActionBaseView):
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−    __select__ = UndoableActionBaseView.__select__ & undoable_action(action_type='A')
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−
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−    def call(self, tx_action):
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−        _ = self._cw._
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−        self.w(_("Added relation : %(entity_from)s %(rtype)s %(entity_to)s") %
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−               self._build_relation_info(tx_action.rtype, tx_action.eid_from, tx_action.eid_to))
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−
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−
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−class UndoableRemoveActionView(UndoableActionBaseView):
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−    __select__ = UndoableActionBaseView.__select__ & undoable_action(action_type='R')
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−
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−    def call(self, tx_action):
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−        _ = self._cw._
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−        self.w(_("Delete relation : %(entity_from)s %(rtype)s %(entity_to)s") %
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−               self._build_relation_info(tx_action.rtype, tx_action.eid_from, tx_action.eid_to))
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−
+
−
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−class UndoableCreateActionView(UndoableActionBaseView):
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−    __select__ = UndoableActionBaseView.__select__ & undoable_action(action_type='C')
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−
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−    def call(self, tx_action):
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−        _ = self._cw._
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−        self.w(_("Created %(etype)s : %(entity)s") % #  : %(changes)s
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−               self._build_entity_info( tx_action.etype, tx_action.eid, tx_action.changes) )
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−
+
−
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−class UndoableDeleteActionView(UndoableActionBaseView):
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−    __select__ = UndoableActionBaseView.__select__ & undoable_action(action_type='D')
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−
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−    def call(self, tx_action):
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−        _ = self._cw._
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−        self.w(_("Deleted %(etype)s : %(entity)s") %
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−               self._build_entity_info( tx_action.etype, tx_action.eid, tx_action.changes))
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−
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−
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−class UndoableUpdateActionView(UndoableActionBaseView):
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−    __select__ = UndoableActionBaseView.__select__ & undoable_action(action_type='U')
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−
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−    def call(self, tx_action):
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−        _ = self._cw._
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−        self.w(_("Updated %(etype)s : %(entity)s") %
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−               self._build_entity_info( tx_action.etype, tx_action.eid, tx_action.changes))