sobjects/hooks.py
author Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
Thu, 28 May 2009 08:06:12 +0200
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"""various library content hooks
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:organization: Logilab
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:copyright: 2001-2009 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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__docformat__ = "restructuredtext en"
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from cubicweb.common.uilib import soup2xhtml
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from cubicweb.server.hooksmanager import Hook
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from cubicweb.server.pool import PreCommitOperation
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class AddUpdateCWUserHook(Hook):
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    """ensure user logins are stripped"""
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    events = ('before_add_entity', 'before_update_entity',)
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    accepts = ('CWUser',)
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    def call(self, session, entity):
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        if 'login' in entity and entity['login']:
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            entity['login'] = entity['login'].strip()
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class AutoDeleteBookmark(PreCommitOperation):
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    beid = None # make pylint happy
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    def precommit_event(self):
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        session = self.session
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        if not self.beid in session.query_data('pendingeids', ()):
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            if not session.unsafe_execute('Any X WHERE X bookmarked_by U, X eid %(x)s',
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                                          {'x': self.beid}, 'x'):
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                session.unsafe_execute('DELETE Bookmark X WHERE X eid %(x)s',
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                                       {'x': self.beid}, 'x')
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class DelBookmarkedByHook(Hook):
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    """ensure user logins are stripped"""
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    events = ('after_delete_relation',)
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    accepts = ('bookmarked_by',)
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    def call(self, session, subj, rtype, obj):
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        AutoDeleteBookmark(session, beid=subj)
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class TidyHtmlFields(Hook):
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    """tidy HTML in rich text strings"""
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    events = ('before_add_entity', 'before_update_entity')
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    accepts = ('Any',)
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    def call(self, session, entity):
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        metaattrs = entity.e_schema.meta_attributes()
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        for metaattr, (metadata, attr) in metaattrs.iteritems():
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            if metadata == 'format':
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                try:
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                    value = entity[attr]
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                except KeyError:
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                    continue # no text to tidy
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                if isinstance(value, unicode): # filter out None and Binary
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                    if self.event == 'before_add_entity':
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                        fmt = entity.get(metaattr)
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                    else:
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                        fmt = entity.get_value(metaattr)
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                    if fmt == 'text/html':
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                        entity[attr] = soup2xhtml(value, session.encoding)