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from typing import Optional, Set, Union, List, Dict, Any
from open_webui.models.users import Users, UserModel
from open_webui.models.groups import Groups
from open_webui.config import DEFAULT_USER_PERMISSIONS
import json
def fill_missing_permissions(
permissions: Dict[str, Any], default_permissions: Dict[str, Any]
) -> Dict[str, Any]:
"""
Recursively fills in missing properties in the permissions dictionary
using the default permissions as a template.
"""
for key, value in default_permissions.items():
if key not in permissions:
permissions[key] = value
elif isinstance(value, dict) and isinstance(
permissions[key], dict
): # Both are nested dictionaries
permissions[key] = fill_missing_permissions(permissions[key], value)
return permissions
def get_permissions(
user_id: str,
default_permissions: Dict[str, Any],
db: Optional[Any] = None,
) -> Dict[str, Any]:
"""
Get all permissions for a user by combining the permissions of all groups the user is a member of.
If a permission is defined in multiple groups, the most permissive value is used (True > False).
Permissions are nested in a dict with the permission key as the key and a boolean as the value.
"""
def combine_permissions(
permissions: Dict[str, Any], group_permissions: Dict[str, Any]
) -> Dict[str, Any]:
"""Combine permissions from multiple groups by taking the most permissive value."""
for key, value in group_permissions.items():
if isinstance(value, dict):
if key not in permissions:
permissions[key] = {}
permissions[key] = combine_permissions(permissions[key], value)
else:
if key not in permissions:
permissions[key] = value
else:
permissions[key] = (
permissions[key] or value
) # Use the most permissive value (True > False)
return permissions
user_groups = Groups.get_groups_by_member_id(user_id, db=db)
# Deep copy default permissions to avoid modifying the original dict
permissions = json.loads(json.dumps(default_permissions))
# Combine permissions from all user groups
for group in user_groups:
permissions = combine_permissions(permissions, group.permissions or {})
# Ensure all fields from default_permissions are present and filled in
permissions = fill_missing_permissions(permissions, default_permissions)
return permissions
def has_permission(
user_id: str,
permission_key: str,
default_permissions: Dict[str, Any] = {},
db: Optional[Any] = None,
) -> bool:
"""
Check if a user has a specific permission by checking the group permissions
and fall back to default permissions if not found in any group.
Permission keys can be hierarchical and separated by dots ('.').
"""
def get_permission(permissions: Dict[str, Any], keys: List[str]) -> bool:
"""Traverse permissions dict using a list of keys (from dot-split permission_key)."""
for key in keys:
if key not in permissions:
return False # If any part of the hierarchy is missing, deny access
permissions = permissions[key] # Traverse one level deeper
return bool(permissions) # Return the boolean at the final level
permission_hierarchy = permission_key.split(".")
# Retrieve user group permissions
user_groups = Groups.get_groups_by_member_id(user_id, db=db)
for group in user_groups:
if get_permission(group.permissions or {}, permission_hierarchy):
return True
# Check default permissions afterward if the group permissions don't allow it
default_permissions = fill_missing_permissions(
default_permissions, DEFAULT_USER_PERMISSIONS
)
return get_permission(default_permissions, permission_hierarchy)
def has_access(
user_id: str,
permission: str = "read",
access_grants: Optional[list] = None,
user_group_ids: Optional[Set[str]] = None,
db: Optional[Any] = None,
) -> bool:
"""
Check if a user has the specified permission using an in-memory access_grants list.
Used for config-driven resources (arena models, tool servers) that store
access control as JSON in PersistentConfig rather than in the access_grant DB table.
Semantics:
- None or [] → private (owner-only, deny all)
- [{"principal_type": "user", "principal_id": "*", "permission": "read"}] → public read
- Specific grants → check user/group membership
"""
if not access_grants:
return False
if user_group_ids is None:
user_groups = Groups.get_groups_by_member_id(user_id, db=db)
user_group_ids = {group.id for group in user_groups}
for grant in access_grants:
if not isinstance(grant, dict):
continue
if grant.get("permission") != permission:
continue
principal_type = grant.get("principal_type")
principal_id = grant.get("principal_id")
if principal_type == "user" and (
principal_id == "*" or principal_id == user_id
):
return True
if (
principal_type == "group"
and user_group_ids
and principal_id in user_group_ids
):
return True
return False
def migrate_access_control(
data: dict, ac_key: str = "access_control", grants_key: str = "access_grants"
) -> None:
"""
Auto-migrate a config dict in-place from legacy access_control dict to access_grants list.
If `grants_key` already exists, does nothing.
If `ac_key` exists (old format), converts it and stores as `grants_key`, then removes `ac_key`.
"""
if grants_key in data:
return
access_control = data.get(ac_key)
if access_control is None and ac_key not in data:
return
grants: List[Dict[str, str]] = []
if access_control and isinstance(access_control, dict):
for perm in ["read", "write"]:
perm_data = access_control.get(perm, {})
if not perm_data:
continue
for group_id in perm_data.get("group_ids", []):
grants.append(
{
"principal_type": "group",
"principal_id": group_id,
"permission": perm,
}
)
for uid in perm_data.get("user_ids", []):
grants.append(
{
"principal_type": "user",
"principal_id": uid,
"permission": perm,
}
)
data[grants_key] = grants
data.pop(ac_key, None)
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