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34 from sqlalchemy.sql import select, literal
35 from sqlalchemy.sql.expression import join
37 from xfeatures import XFeatures
38 from groups import Groups
39 from public import Public
46 class Permissions(XFeatures, Groups, Public):
48 def __init__(self, **params):
49 XFeatures.__init__(self, **params)
50 Groups.__init__(self, **params)
51 Public.__init__(self, **params)
53 def access_grant(self, path, access, members=()):
54 """Grant members with access to path.
55 Members can also be '*' (all),
56 or some group specified as 'owner:group'."""
60 feature = self.xfeature_create(path)
63 self.feature_setmany(feature, access, members)
65 def access_set(self, path, permissions):
66 """Set permissions for path. The permissions dict
67 maps 'read', 'write' keys to member lists."""
69 self.xfeature_destroy(path)
70 self.access_grant(path, READ, permissions.get('read', []))
71 self.access_grant(path, WRITE, permissions.get('write', []))
73 def access_clear(self, path):
74 """Revoke access to path (both permissions and public)."""
76 self.xfeature_destroy(path)
77 self.public_unset(path)
79 def access_check(self, path, access, member):
80 """Return true if the member has this access to the path."""
82 if access == READ and self.public_check(path):
85 r = self.xfeature_inherit(path)
89 members = self.feature_get(feature, access)
90 if member in members or '*' in members:
92 for owner, group in self.group_parents(member):
93 if owner + ':' + group in members:
97 def access_inherit(self, path):
98 """Return the inherited or assigned (path, permissions) pair for path."""
100 r = self.xfeature_inherit(path)
104 permissions = self.feature_dict(feature)
105 if READ in permissions:
106 permissions['read'] = permissions[READ]
107 del(permissions[READ])
108 if WRITE in permissions:
109 permissions['write'] = permissions[WRITE]
110 del(permissions[WRITE])
111 return (fpath, permissions)
113 def access_list(self, path):
114 """List all permission paths inherited by or inheriting from path."""
116 return [x[0] for x in self.xfeature_list(path) if x[0] != path]
118 def access_list_paths(self, member, prefix=None):
119 """Return the list of paths granted to member."""
121 xfeatures_xfeaturevals = self.xfeatures.join(self.xfeaturevals)
123 selectable = (self.groups.c.owner + ':' + self.groups.c.name)
124 member_groups = select([selectable.label('value')],
125 self.groups.c.member == member)
127 members = select([literal(member).label('value')])
129 extended_member_groups = member_groups.union(members).alias()
130 inner_join = join(xfeatures_xfeaturevals,
131 extended_member_groups,
132 self.xfeaturevals.c.value == extended_member_groups.c.value)
133 s = select([self.xfeatures.c.path], from_obj=[inner_join]).distinct()
135 s = s.where(self.xfeatures.c.path.like(prefix + '%'))
136 r = self.conn.execute(s)
137 l = [row[0] for row in r.fetchall()]
141 def access_list_shared(self, prefix=''):
142 """Return the list of shared paths."""
144 s = select([self.xfeatures.c.path],
145 self.xfeatures.c.path.like(prefix + '%'))
146 r = self.conn.execute(s)
147 l = [row[0] for row in r.fetchall()]