Synnefo

# Copyright 2011-2012 GRNET S.A. All rights reserved.

# Redistribution and use in source and binary forms, with or

# without modification, are permitted provided that the following

# conditions are met:

#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

#   2. Redistributions in binary form must reproduce the above

#      copyright notice, this list of conditions and the following

#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

# POSSIBILITY OF SUCH DAMAGE.

# The views and conclusions contained in the software and

# documentation are those of the authors and should not be

# interpreted as representing official policies, either expressed

class Permissions(XFeatures, Groups, Public):

    def __init__(self, **params):

        XFeatures.__init__(self, **params)

        Groups.__init__(self, **params)

        Public.__init__(self, **params)

    def access_grant(self, path, access, members=()):

        """Grant members with access to path.

           Members can also be '*' (all),

           or some group specified as 'owner:group'."""

        if not members:

            return

        feature = self.xfeature_create(path)

        self.feature_setmany(feature, access, members)

    def access_set(self, path, permissions):

        """Set permissions for path. The permissions dict

           maps 'read', 'write' keys to member lists."""

        r = permissions.get('read', [])

        w = permissions.get('write', [])

        if not r and not w:

            self.feature_setmany(feature, READ, r)

        if w:

            self.feature_setmany(feature, WRITE, w)

    def access_get(self, path):

        """Get permissions for path."""

        feature = self.xfeature_get(path)

        if not feature:

            return {}

            permissions['write'] = permissions[WRITE]

            del(permissions[WRITE])

        return permissions

    def access_members(self, path):

        feature = self.xfeature_get(path)

        if not feature:

            members.remove(m)

            members.update(self.group_members(user, group))

        return list(members)

    def access_clear(self, path):

        """Revoke access to path (both permissions and public)."""

        self.xfeature_destroy(path)

        self.public_unset(path)

    def access_clear_bulk(self, paths):

        """Revoke access to path (both permissions and public)."""

        self.xfeature_destroy_bulk(paths)

        self.public_unset_bulk(paths)

    def access_check(self, path, access, member):

        """Return true if the member has this access to the path."""

        feature = self.xfeature_get(path)

        if not feature:

            return False

            if owner + ':' + group in members:

                return True

        return False

    def access_inherit(self, path):

        """Return the paths influencing the access for path."""

#         r = self.xfeature_inherit(path)

#         if not r:

#             return []

#         # Compute valid.

#         return [x[0] for x in r if x[0] in valid]

        # Only keep path components.

        parts = path.rstrip('/').split('/')

        valid = []

            if subp != path:

                valid.append(subp + '/')

        return [x for x in valid if self.xfeature_get(x)]

    def access_list_paths(self, member, prefix=None):

        """Return the list of paths granted to member."""

        selectable = (self.groups.c.owner + ':' + self.groups.c.name)

        member_groups = select([selectable.label('value')],

        members = select([literal(member).label('value')])

        any = select([literal('*').label('value')])

        u = union(member_groups, members, any).alias()

        inner_join = join(xfeatures_xfeaturevals, u,

        s = select([self.xfeatures.c.path], from_obj=[inner_join]).distinct()

        if prefix:

        r = self.conn.execute(s)

        l = [row[0] for row in r.fetchall()]

        r.close()

        return l

    def access_list_shared(self, prefix=''):

        """Return the list of shared paths."""

        s = select([self.xfeatures.c.path],

        r = self.conn.execute(s)

        l = [row[0] for row in r.fetchall()]

        r.close()