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User_is_Record_Owner_or_Curator.py
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User_is_Record_Owner_or_Curator.py
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## $Id$
## This file is part of CDS Invenio.
## Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 CERN.
##
## CDS Invenio is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation; either version 2 of the
## License, or (at your option) any later version.
##
## CDS Invenio is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with CDS Invenio; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""Test whether the user is an owner or curator of a record and based on this,
either prevent them from working with it, or exit silently allowing
processing on the submission to continue.
"""
__revision__ = "$Id$"
from invenio.config import CFG_CERN_SITE
from invenio.search_engine import print_record
from invenio.websubmit_config import InvenioWebSubmitFunctionStop
from invenio.access_control_engine import acc_authorize_action
## The field in which to search for the record submitter/owner's email address:
if CFG_CERN_SITE:
## This is a CERN site - we use 859__f for submitter/record owner's email:
CFG_WEBSUBMIT_RECORD_OWNER_EMAIL = "859__f"
else:
## Non-CERN site. Use 8560_f for submitter/record owner's email:
CFG_WEBSUBMIT_RECORD_OWNER_EMAIL = "8560_f"
CFG_MSG_USER_NOT_AUTHORIZED = """
<SCRIPT>
document.forms[0].action="/submit";
document.forms[0].curpage.value = 1;
document.forms[0].step.value = 0;
document.forms[0].submit();
alert('You are neither owner, nor curator of this record. You are not authorized to modify it.');
</SCRIPT>"""
def User_is_Record_Owner_or_Curator(parameters, curdir, form, user_info=None):
"""In certain actions of some WebSubmit submissions, it may be not be
desirable to allow all users to have a carte blanche to modify
records in a collection as they see fit.
For example, we may say that a user is allowed to modify a document
ONLY if they are listed in the record as an "owner"/"submitter", or
if listed in WebAccess as a "curator" for the given document type
collection.
This function therefore checks whether the user has the rights to
carry out a given action on a document type either by being listed in
the record or explicitly via WebAccess.
If the user has permission, the function ends silently. If not, it
will raise an InvenioWebSubmitFunctionStop, informing the user that
they don't have rights and sending them back to the submission web
form.
@parameters: None.
@return: Empty string.
@Exceptions raised: InvenioWebSubmitFunctionStop when user is denied
permission to work with the record.
"""
global sysno
## Get the document type and action from the form. They can be used to
## ask webaccess whether the user is a super-user for this doctype/action.
doctype = form['doctype']
act = form['act']
## Get the current user's e-mail address:
user_email = user_info["email"]
## Now get the email address(es) of the record submitter(s)/owner(s) from
## the record itself:
record_owners = print_record(sysno, 'tm', \
[CFG_WEBSUBMIT_RECORD_OWNER_EMAIL]).strip()
if record_owners != "":
record_owners_list = record_owners.split("\n")
record_owners_list = [email.lower().strip() \
for email in record_owners_list]
else:
record_owners_list = []
## Now determine whether this user is listed in the record as an "owner"
## (or submitter):
user_has_permission = False
user_msg = ""
if user_email not in ("", "guest") and user_email in record_owners_list:
## This user's email address is listed in the record. She should
## be allowed to work with it:
user_has_permission = True
if not user_has_permission:
## The user isn't listed in the record.
## Using WebAccess, test if she is a "curator" for this submission:
(auth_code, dummy) = acc_authorize_action(user_info, \
"submit", \
verbose=0, \
doctype=doctype, \
act=act)
if auth_code == 0:
## The user is a curator for this submission/collection. Do not
## prevent access.
user_has_permission = True
## Finally, if the user still doesn't have permission to work with this
## record, raise an InvenioWebSubmitFunctionStop exception sending the
## user back to the form.
if not user_has_permission:
raise InvenioWebSubmitFunctionStop(CFG_MSG_USER_NOT_AUTHORIZED)
return ""

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