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"""API for roles and permissions"""
import json
from cornice import Service
from pyramid.security import Everyone, Authenticated
from pyramid.response import Response
from pyramid.view import view_config
from pyramid.httpexceptions import HTTPNotFound, HTTPBadRequest, HTTPServerError
from sqlalchemy.orm import aliased, joinedload, joinedload_all, contains_eager
from assembl.views.api import API_DISCUSSION_PREFIX
from assembl.models import (
get_database_id, AgentProfile, User, Role, Permission, UserRole,
LocalUserRole, DiscussionPermission, Discussion)
from assembl.auth import (
P_READ, P_ADMIN_DISC, P_SYSADMIN, R_SYSADMIN, SYSTEM_ROLES)
from assembl.auth.util import (
user_has_permission as a_user_has_permission, get_permissions,
users_with_permission as a_users_with_permission)
from social_pyramid.utils import load_backend, load_strategy
cors_policy = dict(
enabled=True, origins=('*',), credentials=True, max_age=86400,
headers=('Location', 'Content-Type', 'Content-Length'))
permissions = Service(
name='permissions',
path=API_DISCUSSION_PREFIX + '/permissions',
description="The permissions for a given discussion",
renderer='json', cors_policy=cors_policy
)
permissions_for_role = Service(
name='permissions_for_role',
path=API_DISCUSSION_PREFIX + '/permissions/r/{role_name}',
description="The permissions for a single role",
renderer='json', cors_policy=cors_policy
)
roles = Service(
name='roles',
path=API_DISCUSSION_PREFIX + '/roles',
description="The roles defined in the system",
renderer='json', cors_policy=cors_policy
)
global_roles_for_user = Service(
name='generic_roles_for_user',
path=API_DISCUSSION_PREFIX + '/roles/globalfor/{user_id:.+}',
description="The universal roles of a given user",
renderer='json', cors_policy=cors_policy
)
discussion_roles_for_user = Service(
name='discussion_roles_for_user',
path=API_DISCUSSION_PREFIX + '/roles/localfor/{user_id:.+}',
description="The per-discussion roles of a given user",
renderer='json', cors_policy=cors_policy
)
permissions_for_user = Service(
name='permissions_for_user',
path=API_DISCUSSION_PREFIX + '/permissions/u/{user_id:.+}',
description="The per-discussion permissions of a given user",
renderer='json', cors_policy=cors_policy
)
user_has_permission = Service(
name='user_has_permission',
path=API_DISCUSSION_PREFIX + '/permissions/{permission}/u/{user_id:.+}',
description="Whether a given user has a specific permission",
renderer='json'
)
users_with_permission = Service(
name='users_with_permission',
path=API_DISCUSSION_PREFIX + '/permissions/{permission}/u/',
description="Which users have a specific permission",
renderer='json'
)
@permissions.get(permission=P_READ)
def get_permissions_for_discussion(request):
discussion_id = int(request.matchdict['discussion_id'])
session = Discussion.default_db
discussion = session.query(Discussion).get(discussion_id)
if not discussion:
raise HTTPNotFound("Discussion %d does not exist" % (discussion_id,))
return discussion.get_permissions_by_role()
@permissions_for_role.get(permission=P_READ)
def get_permissions_for_role(request):
discussion_id = int(request.matchdict['discussion_id'])
role_name = request.matchdict['role_name']
session = Discussion.default_db
discussion = session.query(Discussion).get(discussion_id)
if not discussion:
raise HTTPNotFound("Discussion %d does not exist" % (discussion_id,))
role = Role.get_by(name=role_name)
if not role:
raise HTTPNotFound("Role %s does not exist" % (role_name,))
return discussion.get_permissions_by_role().get(role_name, [])
@permissions_for_role.put(permission=P_ADMIN_DISC)
def put_permissions_for_role(request):
discussion_id = int(request.matchdict['discussion_id'])
role_name = request.matchdict['role_name']
session = Discussion.default_db
discussion = session.query(Discussion).get(discussion_id)
if not discussion:
raise HTTPNotFound("Discussion %d does not exist" % (discussion_id,))
role = Role.get_by(name=role_name)
if not role:
raise HTTPNotFound("Role %s does not exist" % (role_name,))
try:
data = json.loads(request.body)
except Exception as e:
raise HTTPBadRequest("Malformed Json")
if not isinstance(data, list):
raise HTTPBadRequest("Not a list")
if data and frozenset((type(x) for x in data)) != frozenset((str,)):
raise HTTPBadRequest("not strings")
permissions = set(session.query(Permission).filter(Permission.name.in_(data)).all())
data = set(data)
if len(permissions) != len(data):
raise HTTPBadRequest("Not valid permissions: %s" % (repr(
data - set((p.name for p in permissions))),))
known_dp = session.query(DiscussionPermission).join(Permission).filter(
role=role, discussion=discussion).all()
dp_by_permission = {dp.permission.name: dp for dp in known_dp}
known_permissions = set(dp_by_permission.keys())
for permission in known_permissions - permissions:
session.delete(dp_by_permission[permission])
for permission in permissions - known_permissions:
session.add(DiscussionPermission(
role=role, permission=permission, discussion=discussion))
return {"added": list(permissions - known_permissions),
"removed": list(known_permissions - permissions)}
@roles.get(permission=P_READ)
def get_roles(request):
session = Role.default_db
roles = session.query(Role)
return [r.name for r in roles]
@roles.put(permission=P_SYSADMIN)
def put_roles(request):
session = Role.default_db
try:
data = json.loads(request.body)
except Exception as e:
raise HTTPBadRequest("Malformed Json")
if not isinstance(data, list):
raise HTTPBadRequest("Not a list")
if data and frozenset((type(x) for x in data)) != frozenset((str,)):
raise HTTPBadRequest("not strings")
data = set(data)
known_roles = session.query(Role).all()
roles_by_name = {r.name: r for r in known_roles}
role_names = set(roles_by_name.keys())
# new roles
for name in data - role_names:
session.add(Role(name=name))
# delete non-system roles.
for name in role_names - data - SYSTEM_ROLES:
session.delete(roles_by_name[name])
return {"added": list(data - role_names),
"removed": list(role_names - data - SYSTEM_ROLES)}
@global_roles_for_user.get(permission=P_READ)
def get_global_roles_for_user(request):
user_id = request.matchdict['user_id']
user = User.get_instance(user_id)
if not user:
raise HTTPNotFound("User id %s does not exist" % (user_id,))
rolenames = User.default_db.query(Role.name).join(
UserRole).filter(UserRole.user == user)
return [x[0] for x in rolenames]
@global_roles_for_user.put(permission=P_SYSADMIN)
def put_global_roles_for_user(request):
user_id = request.matchdict['user_id']
user = User.get_instance(user_id)
session = User.default_db
if not user:
raise HTTPNotFound("User id %d does not exist" % (user_id,))
try:
data = json.loads(request.body)
except Exception as e:
raise HTTPBadRequest("Malformed Json")
if not isinstance(data, list):
raise HTTPBadRequest("Not a list")
if data and frozenset((type(x) for x in data)) != frozenset((str,)):
raise HTTPBadRequest("not strings")
roles = set(session.query(Role).filter(Role.name.in_(data)).all())
data = set(data)
if len(roles) != len(data):
raise HTTPBadRequest("Not valid roles: %s" % (repr(
data - set((p.name for p in roles))),))
known_gu_roles = session.query(UserRole).join(Role).filter(
user=user).all()
gur_by_role = {gur.role.name: gur for gur in known_gu_roles}
known_roles = set(gur_by_role.keys())
for role in known_roles - roles:
session.query.delete(gur_by_role[role])
for role in roles - known_roles:
session.add(UserRole(user=user, role=role))
return {"added": list(roles - known_roles),
"removed": list(known_roles - roles)}
@discussion_roles_for_user.get(permission=P_READ)
def get_discussion_roles_for_user(request):
discussion_id = int(request.matchdict['discussion_id'])
user_id = request.matchdict['user_id']
user = User.get_instance(user_id)
session = Discussion.default_db
if not user:
raise HTTPNotFound("User id %d does not exist" % (user_id,))
rolenames = session.query(Role.name).join(
LocalUserRole).filter(LocalUserRole.user == user,
LocalUserRole.discussion_id == discussion_id)
return [x[0] for x in rolenames]
@discussion_roles_for_user.put(permission=P_ADMIN_DISC)
def put_discussion_roles_for_user(request):
discussion_id = int(request.matchdict['discussion_id'])
discussion = Discussion.get_instance(discussion_id)
if not discussion:
raise HTTPNotFound("Discussion %d does not exist" % (discussion_id,))
user_id = request.matchdict['user_id']
user = User.get_instance(user_id)
if not user:
raise HTTPNotFound("User id %d does not exist" % (user_id,))
try:
data = json.loads(request.body)
except Exception as e:
raise HTTPBadRequest("Malformed Json")
session = Discussion.default_db
if not isinstance(data, list):
raise HTTPBadRequest("Not a list")
if data and frozenset((type(x) for x in data)) != frozenset((str,)):
raise HTTPBadRequest("not strings")
roles = set(session.query(Role).filter(Role.name.in_(data)).all())
data = set(data)
if len(roles) != len(data):
raise HTTPBadRequest("Not valid roles: %s" % (repr(
data - set((p.name for p in roles))),))
known_lu_roles = session.query(LocalUserRole).join(Role).filter(
user=user, discussion=discussion).all()
lur_by_role = {lur.role.name: lur for lur in known_lu_roles}
known_roles = set(lur_by_role.keys())
for role in known_roles - roles:
session.query.delete(lur_by_role[role])
for role in roles - known_roles:
session.add(LocalUserRole(
user=user, role=role, discussion=discussion))
return {"added": list(roles - known_roles),
"removed": list(known_roles - roles)}
@permissions_for_user.get()
def get_permissions_for_user(request):
discussion_id = int(request.matchdict['discussion_id'])
discussion = Discussion.get_instance(discussion_id)
if not discussion:
raise HTTPNotFound("Discussion %d does not exist" % (discussion_id,))
user_id = request.matchdict['user_id']
if user_id not in (Authenticated, Everyone):
user = User.get_instance(user_id)
if not user:
raise HTTPNotFound("User id %s does not exist" % (user_id,))
user_id = user.id
return get_permissions(user_id, discussion_id)
@user_has_permission.get()
def get_user_has_permission(request):
discussion_id = int(request.matchdict['discussion_id'])
user_id = request.matchdict['user_id']
permission = request.matchdict['permission']
discussion = Discussion.get_instance(discussion_id)
if not discussion:
raise HTTPNotFound("Discussion %d does not exist" % (discussion_id,))
if user_id not in (Authenticated, Everyone):
user = User.get_instance(user_id)
if not user:
raise HTTPNotFound("User id %s does not exist" % (user_id,))
user_id = user.id
return a_user_has_permission(discussion_id, user_id, permission)
@users_with_permission.get()
def get_user_has_permission(request):
discussion_id = int(request.matchdict['discussion_id'])
permission = request.matchdict['permission']
discussion = Discussion.get_instance(discussion_id)
if not discussion:
raise HTTPNotFound("Discussion %d does not exist" % (discussion_id,))
return a_users_with_permission(discussion_id, permission)
@view_config(route_name='saml_metadata')
def saml_metadata_view(request):
complete_url = request.route_url('social.complete', backend="saml")
saml_backend = load_backend(
load_strategy(request),
"saml",
redirect_uri=complete_url,
)
metadata, errors = saml_backend.generate_metadata_xml()
if errors:
raise HTTPServerError("SAML issue:" + errors)
return Response(metadata, content_type='text/xml')