author | Aurelien Campeas <aurelien.campeas@logilab.fr> |
Wed, 14 Apr 2010 16:31:20 +0200 | |
branch | stable |
changeset 5254 | de4721274648 |
parent 4759 | af2e6c377c71 |
child 5421 | 8167de96c523 |
permissions | -rw-r--r-- |
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"""some utilities to define schema permissions |
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:organization: Logilab |
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:copyright: 2008-2010 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 rql.utils import quote |
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from cubicweb.schema import RO_REL_PERMS, RO_ATTR_PERMS, \ |
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PUB_SYSTEM_ENTITY_PERMS, PUB_SYSTEM_REL_PERMS, \ |
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ERQLExpression, RRQLExpression |
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# permissions for "meta" entity type (readable by anyone, can only be |
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# added/deleted by managers) |
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META_ETYPE_PERMS = PUB_SYSTEM_ENTITY_PERMS # XXX deprecates |
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# permissions for "meta" relation type (readable by anyone, can only be |
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# added/deleted by managers) |
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META_RTYPE_PERMS = PUB_SYSTEM_REL_PERMS # XXX deprecates |
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# permissions for relation type that should only set by hooks using unsafe |
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# execute, readable by anyone |
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HOOKS_RTYPE_PERMS = RO_REL_PERMS # XXX deprecates |
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def _perm(names): |
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if isinstance(names, (list, tuple)): |
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if len(names) == 1: |
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names = quote(names[0]) |
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else: |
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names = 'IN (%s)' % (','.join(quote(name) for name in names)) |
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else: |
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names = quote(names) |
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#return u' require_permission P, P name %s, U in_group G, P require_group G' % names |
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return u' require_permission P, P name %s, U has_group_permission P' % names |
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def xperm(*names): |
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return 'X' + _perm(names) |
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def xexpr(*names): |
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return ERQLExpression(xperm(*names)) |
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def xrexpr(relation, *names): |
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return ERQLExpression('X %s Y, Y %s' % (relation, _perm(names))) |
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def xorexpr(relation, etype, *names): |
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return ERQLExpression('Y %s X, X is %s, Y %s' % (relation, etype, _perm(names))) |
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def sexpr(*names): |
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return RRQLExpression('S' + _perm(names), 'S') |
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def restricted_sexpr(restriction, *names): |
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rql = '%s, %s' % (restriction, 'S' + _perm(names)) |
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return RRQLExpression(rql, 'S') |
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def restricted_oexpr(restriction, *names): |
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rql = '%s, %s' % (restriction, 'O' + _perm(names)) |
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return RRQLExpression(rql, 'O') |
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def oexpr(*names): |
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return RRQLExpression('O' + _perm(names), 'O') |
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# def supdate_perm(): |
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# return RRQLExpression('U has_update_permission S', 'S') |
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# def oupdate_perm(): |
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# return RRQLExpression('U has_update_permission O', 'O') |
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def relxperm(rel, role, *names): |
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assert role in ('subject', 'object') |
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if role == 'subject': |
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zxrel = ', X %s Z' % rel |
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else: |
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zxrel = ', Z %s X' % rel |
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return 'Z' + _perm(names) + zxrel |
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def relxexpr(rel, role, *names): |
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return ERQLExpression(relxperm(rel, role, *names)) |