entities/lib.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Tue, 19 May 2009 10:04:15 +0200
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"""entity classes for optional library entities
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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 urlparse import urlsplit, urlunsplit
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from datetime import datetime
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from logilab.common.decorators import cached
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from cubicweb import UnknownProperty
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from cubicweb.entity import _marker
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from cubicweb.entities import AnyEntity, fetch_config
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def mangle_email(address):
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    try:
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        name, host = address.split('@', 1)
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    except ValueError:
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        return address
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    return '%s at %s' % (name, host.replace('.', ' dot '))
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class EmailAddress(AnyEntity):
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    id = 'EmailAddress'
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    fetch_attrs, fetch_order = fetch_config(['address', 'alias', 'canonical'])
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    def dc_title(self):
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        if self.alias:
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            return '%s <%s>' % (self.alias, self.display_address())
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        return self.display_address()
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    @property
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    def email_of(self):
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        return self.reverse_use_email and self.reverse_use_email[0]
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    @cached
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    def canonical_form(self):
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        if self.canonical:
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            return self
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        rql = 'EmailAddress X WHERE X identical_to Y, X canonical TRUE, Y eid %(y)s'
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        cnrset = self.req.execute(rql, {'y': self.eid}, 'y')
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        if cnrset:
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            return cnrset.get_entity(0, 0)
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        return None
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    def related_emails(self, skipeids=None):
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        # XXX move to eemail
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        # check email relations are in the schema first
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        subjrels = self.e_schema.object_relations()
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        if not ('sender' in subjrels and 'recipients' in subjrels):
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            return
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        rql = 'DISTINCT Any X, S, D ORDERBY D DESC WHERE X sender Y or X recipients Y, X subject S, X date D, Y eid %(y)s'
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        rset = self.req.execute(rql, {'y': self.eid}, 'y')
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        if skipeids is None:
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            skipeids = set()
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        for i in xrange(len(rset)):
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            eid = rset[i][0]
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            if eid in skipeids:
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                continue
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            skipeids.add(eid)
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            yield rset.get_entity(i, 0)
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    def display_address(self):
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        if self.vreg.config['mangle-emails']:
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            return mangle_email(self.address)
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        return self.address
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    def printable_value(self, attr, value=_marker, attrtype=None,
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                        format='text/html'):
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        """overriden to return displayable address when necessary"""
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        if attr == 'address':
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            return self.display_address()
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        return super(EmailAddress, self).printable_value(attr, value, attrtype, format)
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    def after_deletion_path(self):
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        """return (path, parameters) which should be used as redirect
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        information when this entity is being deleted
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        """
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        if self.email_of:
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            return self.email_of.rest_path(), {}
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        return super(EmailAddress, self).after_deletion_path()
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from logilab.common.deprecation import class_renamed
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Emailaddress = class_renamed('Emailaddress', EmailAddress)
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Emailaddress.id = 'Emailaddress'
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class CWProperty(AnyEntity):
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    id = 'CWProperty'
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    fetch_attrs, fetch_order = fetch_config(['pkey', 'value'])
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    rest_attr = 'pkey'
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    def typed_value(self):
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        return self.vreg.typed_value(self.pkey, self.value)
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    def dc_description(self, format='text/plain'):
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        try:
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            return self.req._(self.vreg.property_info(self.pkey)['help'])
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        except UnknownProperty:
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            return u''
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    def after_deletion_path(self):
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        """return (path, parameters) which should be used as redirect
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        information when this entity is being deleted
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        """
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        return 'view', {}
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class Bookmark(AnyEntity):
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    """customized class for Bookmark entities"""
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    id = 'Bookmark'
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    fetch_attrs, fetch_order = fetch_config(['title', 'path'])
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    def actual_url(self):
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        url = self.req.build_url(self.path)
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        if self.title:
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            urlparts = list(urlsplit(url))
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            if urlparts[3]:
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                urlparts[3] += '&vtitle=%s' % self.req.url_quote(self.title)
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            else:
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                urlparts[3] = 'vtitle=%s' % self.req.url_quote(self.title)
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            url = urlunsplit(urlparts)
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        return url
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    def action_url(self):
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        return self.absolute_url() + '/follow'
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class CWCache(AnyEntity):
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    """Cache"""
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    id = 'CWCache'
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    fetch_attrs, fetch_order = fetch_config(['name'])
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    def touch(self):
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        self.req.execute('SET X timestamp %(t)s WHERE X eid %(x)s',
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                         {'t': datetime.now(), 'x': self.eid}, 'x')
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    def valid(self, date):
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        return date < self.timestamp