__init__.py
author Sylvain Thenault <sylvain.thenault@logilab.fr>
Tue, 23 Dec 2008 14:38:59 +0100
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"""CubicWeb is a generic framework to quickly build applications which describes
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relations between entitites.
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:organization: Logilab
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:copyright: 2001-2008 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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:license: General Public License version 2 - http://www.gnu.org/licenses
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"""
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__docformat__ = "restructuredtext en"
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from cubicweb.__pkginfo__ import version as __version__
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import __builtin__
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# '_' is available in builtins to mark internationalized string but should
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# not be used to do the actual translation
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if not hasattr(__builtin__, '_'):
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    __builtin__._ = unicode
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CW_SOFTWARE_ROOT = __path__[0]
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import sys, os, logging
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from StringIO import StringIO
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from urllib import quote as urlquote, unquote as urlunquote
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from logilab.common.decorators import cached
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LLDEBUG = 5
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logging.addLevelName(LLDEBUG, 'LLDEBUG')
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class CubicWebLogger(logging.Logger):
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    def lldebug(self, msg, *args, **kwargs):
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        """
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        Log 'msg % args' with severity 'DEBUG'.
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        To pass exception information, use the keyword argument exc_info with
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        a true value, e.g.
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        logger.debug("Houston, we have a %s", "thorny problem", exc_info=1)
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        """
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        if self.manager.disable >= LLDEBUG:
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            return
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        if LLDEBUG >= self.getEffectiveLevel():
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            self._log(LLDEBUG, msg, args, **kwargs)
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logging.setLoggerClass(CubicWebLogger)
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def set_log_methods(cls, logger):
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    """bind standart logger's methods as static methods on the class
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    """
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    cls._logger = logger
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    for attr in ('lldebug', 'debug', 'info', 'warning', 'error', 'critical', 'exception'):
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        setattr(cls, attr, getattr(logger, attr))
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if os.environ.get('APYCOT_ROOT'):
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    logging.basicConfig(level=logging.CRITICAL)
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else:
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    logging.basicConfig()
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set_log_methods(sys.modules[__name__], logging.getLogger('cubicweb'))
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# make all exceptions accessible from the package
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from cubicweb._exceptions import *
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# convert eid to the right type, raise ValueError if it's not a valid eid
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typed_eid = int
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#def log_thread(f, w, a):
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#    print f.f_code.co_filename, f.f_code.co_name
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#import threading
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#threading.settrace(log_thread)
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class Binary(StringIO):
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    """customize StringIO to make sure we don't use unicode"""
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    def __init__(self, buf= ''):
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        assert isinstance(buf, (str, buffer)), \
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               "Binary objects must use raw strings, not %s" % buf.__class__
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        StringIO.__init__(self, buf)
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    def write(self, data):
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        assert isinstance(data, (str, buffer)), \
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               "Binary objects must use raw strings, not %s" % data.__class__
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        StringIO.write(self, data)
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class RequestSessionMixIn(object):
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    """mixin class containing stuff shared by server session and web request
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    """
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    def __init__(self, vreg):
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        self.vreg = vreg
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        try:
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            encoding = vreg.property_value('ui.encoding')
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        except: # no vreg or property not registered
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            encoding = 'utf-8'
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        self.encoding = encoding
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        # cache result of execution for (rql expr / eids),
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        # should be emptied on commit/rollback of the server session / web 
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        # connection
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        self.local_perm_cache = {}
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    def property_value(self, key):
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        if self.user:
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            return self.user.property_value(key)
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        return self.vreg.property_value(key)
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    def etype_rset(self, etype, size=1):
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        """return a fake result set for a particular entity type"""
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        from cubicweb.rset import ResultSet
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        rset = ResultSet([('A',)]*size, '%s X' % etype,
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                         description=[(etype,)]*size)
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        def get_entity(row, col=0, etype=etype, vreg=self.vreg, rset=rset):
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            return self.vreg.etype_class(etype)(self, rset, row, col)
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        rset.get_entity = get_entity
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        return self.decorate_rset(rset)
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    def eid_rset(self, eid, etype=None):
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        """return a result set for the given eid without doing actual query
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        (we have the eid, we can suppose it exists and user has access to the
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        entity)
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        """
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        from cubicweb.rset import ResultSet
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        eid = typed_eid(eid)
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        if etype is None:
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            etype = self.describe(eid)[0]
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        rset = ResultSet([(eid,)], 'Any X WHERE X eid %(x)s', {'x': eid},
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                         [(etype,)])
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        return self.decorate_rset(rset)
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    def entity_from_eid(self, eid, etype=None):
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        rset = self.eid_rset(eid, etype)
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        if rset:
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            return rset.get_entity(0, 0)
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   135
        else:
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            return None
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   137
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    # url generation methods ##################################################
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   139
    
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    def build_url(self, method, base_url=None, **kwargs):
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        """return an absolute URL using params dictionary key/values as URL
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        parameters. Values are automatically URL quoted, and the
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   143
        publishing method to use may be specified or will be guessed.
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        """
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   145
        if base_url is None:
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            base_url = self.base_url()
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   147
        if '_restpath' in kwargs:
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   148
            assert method == 'view', method
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            path = kwargs.pop('_restpath')
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   150
        else:
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            path = method
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        if not kwargs:
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            return u'%s%s' % (base_url, path)
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        return u'%s%s?%s' % (base_url, path, self.build_url_params(**kwargs))
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   155
        
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   156
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    def build_url_params(self, **kwargs):
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        """return encoded params to incorporate them in an URL"""
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   159
        args = []
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   160
        for param, values in kwargs.items():
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   161
            if not isinstance(values, (list, tuple)):
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   162
                values = (values,)
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   163
            for value in values:
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   164
                args.append(u'%s=%s' % (param, self.url_quote(value)))
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   165
        return '&'.join(args)
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   166
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   167
    def url_quote(self, value, safe=''):
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   168
        """urllib.quote is not unicode safe, use this method to do the
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   169
        necessary encoding / decoding. Also it's designed to quote each
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   170
        part of a url path and so the '/' character will be encoded as well.
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   171
        """
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   172
        if isinstance(value, unicode):
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   173
            quoted = urlquote(value.encode(self.encoding), safe=safe)
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   174
            return unicode(quoted, self.encoding)
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   175
        return urlquote(str(value), safe=safe)
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   176
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   177
    def url_unquote(self, quoted):
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   178
        """returns a unicode unquoted string
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diff changeset
   179
        
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   180
        decoding is based on `self.encoding` which is the encoding
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   181
        used in `url_quote`
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   182
        """
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parents:
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   183
        if isinstance(quoted, unicode):
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   184
            quoted = quoted.encode(self.encoding)
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   185
        try:
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   186
            return unicode(urlunquote(quoted), self.encoding)
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   187
        except UnicodeDecodeError: # might occurs on manually typed URLs
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   188
            return unicode(urlunquote(quoted), 'iso-8859-1')
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parents:
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   189
    
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   190
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   191
    # session's user related methods #####################################
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parents:
diff changeset
   192
    
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   193
    @cached
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   194
    def user_data(self):
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   195
        """returns a dictionnary with this user's information"""
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   196
        userinfo = {}
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   197
        if self.is_internal_session:
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   198
            userinfo['login'] = "cubicweb"
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   199
            userinfo['name'] = "cubicweb"
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   200
            userinfo['email'] = ""
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   201
            return userinfo
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   202
        user = self.actual_session().user
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   203
        rql = "Any F,S,A where U eid %(x)s, U firstname F, U surname S, U primary_email E, E address A"
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parents:
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   204
        try:
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   205
            firstname, lastname, email = self.execute(rql, {'x': user.eid}, 'x')[0]
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parents:
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   206
            if firstname is None and lastname is None:
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parents:
diff changeset
   207
                userinfo['name'] = ''
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diff changeset
   208
            else:
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parents:
diff changeset
   209
                userinfo['name'] = ("%s %s" % (firstname, lastname))
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parents:
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   210
            userinfo['email'] = email
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parents:
diff changeset
   211
        except IndexError:
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parents:
diff changeset
   212
            userinfo['name'] = None
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parents:
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   213
            userinfo['email'] = None
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parents:
diff changeset
   214
        userinfo['login'] = user.login
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parents:
diff changeset
   215
        return userinfo
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parents:
diff changeset
   216
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   217
    def is_internal_session(self):
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parents:
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   218
        """overrided on the server-side"""
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parents:
diff changeset
   219
        return False
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parents:
diff changeset
   220
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   221
    # abstract methods to override according to the web front-end #############
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parents:
diff changeset
   222
    
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parents:
diff changeset
   223
    def base_url(self):
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   224
        """return the root url of the application"""
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diff changeset
   225
        raise NotImplementedError
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parents:
diff changeset
   226
    
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   227
    def decorate_rset(self, rset):
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parents:
diff changeset
   228
        """add vreg/req (at least) attributes to the given result set """
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parents:
diff changeset
   229
        raise NotImplementedError
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parents:
diff changeset
   230
    
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parents:
diff changeset
   231
    def describe(self, eid):
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parents:
diff changeset
   232
        """return a tuple (type, sourceuri, extid) for the entity with id <eid>"""
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parents:
diff changeset
   233
        raise NotImplementedError
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   234
        
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   235
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diff changeset
   236
# XXX 2.45 is allowing nicer entity type names, use this map for bw compat    
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parents:
diff changeset
   237
ETYPE_NAME_MAP = {'Eetype': 'EEType',
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parents:
diff changeset
   238
                  'Ertype': 'ERType',
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   239
                  'Efrdef': 'EFRDef',
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parents:
diff changeset
   240
                  'Enfrdef': 'ENFRDef',
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parents:
diff changeset
   241
                  'Econstraint': 'EConstraint',
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   242
                  'Econstrainttype': 'EConstraintType',
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parents:
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   243
                  'Epermission': 'EPermission',
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parents:
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   244
                  'Egroup': 'EGroup',
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parents:
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   245
                  'Euser': 'EUser',
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
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   246
                  'Eproperty': 'EProperty',
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parents:
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   247
                  'Emailaddress': 'EmailAddress',
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
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   248
                  'Rqlexpression': 'RQLExpression',
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   249
                  'Trinfo': 'TrInfo',
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parents:
diff changeset
   250
                  }
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parents:
diff changeset
   251
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parents:
diff changeset
   252
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parents:
diff changeset
   253
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parents:
diff changeset
   254
# XXX cubic web cube migration map
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parents:
diff changeset
   255
CW_MIGRATION_MAP = {'erudi': 'cubicweb',
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   256
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   257
                    'eaddressbook': 'addressbook',
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parents:
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   258
                    'ebasket': 'basket',
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parents:
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   259
                    'eblog': 'blog',
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parents:
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   260
                    'ebook': 'book',
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parents:
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   261
                    'ecomment': 'comment',
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   262
                    'ecompany': 'company',
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parents:
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   263
                    'econference':  'conference',
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parents:
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   264
                    'eemail': 'email',
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parents:
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   265
                    'eevent': 'event',
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   266
                    'eexpense': 'expense',
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                    'efile': 'file',
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                    'einvoice': 'invoice',
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                    'elink': 'link',
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                    'emailinglist': 'mailinglist',
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                    'eperson': 'person',
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                    'eshopcart': 'shopcart',
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                    'eskillmat': 'skillmat',
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                    'etask': 'task',
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                    'eworkcase': 'workcase',
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                    'eworkorder': 'workorder',
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                    'ezone': 'zone',
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                    'i18ncontent': 'i18ncontent',
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                    'svnfile': 'vcsfile',
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                    'eclassschemes': 'keyword',
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                    'eclassfolders': 'folder',
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                    'eclasstags': 'tag',
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                    'jpl': 'jpl',
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                    'jplintra': 'jplintra',
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                    'jplextra': 'jplextra',
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                    'jplorg': 'jplorg',
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                    'jplrecia': 'jplrecia',
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                    'crm': 'crm',
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                    'agueol': 'agueol',
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                    'docaster': 'docaster',
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                    'asteretud': 'asteretud',
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                    # XXX temp
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                    'keywords': 'keyword',
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                    'folders': 'folder',
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                    'tags': 'tag',
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                    }
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def neg_role(role):
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    if role == 'subject':
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        return 'object'
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    return 'subject'
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def role(obj):
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    try:
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        return obj.role
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    except AttributeError:
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        return neg_role(obj.target)
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def target(obj):
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    try:
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        return obj.target
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    except AttributeError:
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        return neg_role(obj.role)
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