Files
paskia/paskia/db/structs.py
T

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7.7 KiB
Python

from datetime import datetime, timezone
from uuid import UUID
import msgspec
import uuid7
# Sentinel for uuid fields before they are set by create() or DB post init
_UUID_UNSET = UUID(int=0)
class Permission(msgspec.Struct, dict=True, omit_defaults=True):
"""Permission data structure.
Mutable fields: scope, display_name, domain, orgs
Immutable fields: None (all fields can be updated via update_permission)
uuid is generated at creation.
"""
scope: str # Permission scope identifier (e.g. "auth:admin", "myapp:write")
display_name: str
domain: str | None = None # If set, scopes permission to this domain
orgs: dict[UUID, bool] = {} # org_uuid -> True (which orgs can grant this)
def __post_init__(self):
self.uuid: UUID = _UUID_UNSET # Convenience field, not serialized
@property
def org_set(self) -> set[UUID]:
"""Get orgs that can grant this permission as a set."""
return set(self.orgs.keys())
@classmethod
def create(
cls,
scope: str,
display_name: str,
domain: str | None = None,
) -> "Permission":
"""Create a new Permission with auto-generated uuid7."""
perm = cls(
scope=scope,
display_name=display_name,
domain=domain,
)
perm.uuid = uuid7.create()
return perm
class Role(msgspec.Struct, dict=True, omit_defaults=True):
"""Role data structure.
Mutable fields: display_name, permissions
Immutable fields: org (set at creation, never modified)
uuid is generated at creation.
"""
org: UUID
display_name: str
permissions: dict[UUID, bool] = {} # permission_uuid -> True
def __post_init__(self):
self.uuid: UUID = _UUID_UNSET # Convenience field, not serialized
@property
def permission_set(self) -> set[UUID]:
"""Get permissions as a set of UUIDs."""
return set(self.permissions.keys())
@classmethod
def create(
cls,
org: UUID,
display_name: str,
permissions: set[UUID] | None = None,
) -> "Role":
"""Create a new Role with auto-generated uuid7."""
role = cls(
org=org,
display_name=display_name,
permissions={p: True for p in (permissions or set())},
)
role.uuid = uuid7.create()
return role
class Org(msgspec.Struct, dict=True):
"""Organization data structure."""
display_name: str
def __post_init__(self):
self.uuid: UUID = _UUID_UNSET # Convenience field, not serialized
@classmethod
def create(cls, display_name: str) -> "Org":
"""Create a new Org with auto-generated uuid7."""
org = cls(display_name=display_name)
org.uuid = uuid7.create()
return org
class User(msgspec.Struct, dict=True):
"""User data structure.
Mutable fields: display_name, role, last_seen, visits
Immutable fields: created_at (set at creation, never modified)
uuid is derived from created_at using uuid7.
"""
display_name: str
role: UUID
created_at: datetime
last_seen: datetime | None = None
visits: int = 0
def __post_init__(self):
self.uuid: UUID = _UUID_UNSET # Convenience field, not serialized
@classmethod
def create(
cls,
display_name: str,
role: UUID,
created_at: datetime | None = None,
) -> "User":
"""Create a new User with auto-generated uuid7."""
user = cls(
display_name=display_name,
role=role,
created_at=created_at or datetime.now(timezone.utc),
)
user.uuid = uuid7.create(user.created_at)
return user
class Credential(msgspec.Struct, dict=True):
"""Credential (passkey) data structure.
Mutable fields: sign_count, last_used, last_verified
Immutable fields: credential_id, user, aaguid, public_key, created_at
uuid is derived from created_at using uuid7.
"""
credential_id: bytes # Long binary ID from the authenticator
user: UUID
aaguid: UUID
public_key: bytes
sign_count: int
created_at: datetime
last_used: datetime | None = None
last_verified: datetime | None = None
def __post_init__(self):
self.uuid: UUID = _UUID_UNSET # Convenience field, not serialized
@classmethod
def create(
cls,
credential_id: bytes,
user: UUID,
aaguid: UUID,
public_key: bytes,
sign_count: int,
created_at: datetime | None = None,
) -> "Credential":
"""Create a new Credential with auto-generated uuid7."""
now = created_at or datetime.now(timezone.utc)
cred = cls(
credential_id=credential_id,
user=user,
aaguid=aaguid,
public_key=public_key,
sign_count=sign_count,
created_at=now,
last_used=now,
last_verified=now,
)
cred.uuid = uuid7.create(now)
return cred
class Session(msgspec.Struct, dict=True):
"""Session data structure.
Mutable fields: expiry (updated on session refresh)
Immutable fields: user, credential, host, ip, user_agent
key is stored in the dict key, not in the struct.
"""
user: UUID
credential: UUID
host: str
ip: str
user_agent: str
expiry: datetime
def __post_init__(self):
self.key: str = "" # Convenience field, not serialized
def metadata(self) -> dict:
"""Return session metadata for backwards compatibility."""
return {
"ip": self.ip,
"user_agent": self.user_agent,
"expiry": self.expiry.isoformat(),
}
class ResetToken(msgspec.Struct, dict=True):
"""Reset/device-addition token data structure.
Immutable fields: All fields (tokens are created and deleted, never modified)
key is stored in the dict key, not in the struct.
"""
user: UUID
expiry: datetime
token_type: str
def __post_init__(self):
self.key: bytes = b"" # Convenience field, not serialized
class SessionContext(msgspec.Struct):
session: Session
user: User
org: Org
role: Role
credential: Credential
permissions: list[Permission] = []
# -------------------------------------------------------------------------
# Database storage structure
# -------------------------------------------------------------------------
class DB(msgspec.Struct, dict=True, omit_defaults=False):
"""In-memory database. Access fields directly for reads."""
permissions: dict[UUID, Permission] = {}
orgs: dict[UUID, Org] = {}
roles: dict[UUID, Role] = {}
users: dict[UUID, User] = {}
credentials: dict[UUID, Credential] = {}
sessions: dict[str, Session] = {}
reset_tokens: dict[bytes, ResetToken] = {}
v: int = 0
def __post_init__(self):
# Store reference for persistence (not serialized)
self._store = None
# Set the key fields on all stored objects
for uuid, perm in self.permissions.items():
perm.uuid = uuid
for uuid, org in self.orgs.items():
org.uuid = uuid
for uuid, role in self.roles.items():
role.uuid = uuid
for uuid, user in self.users.items():
user.uuid = uuid
for uuid, cred in self.credentials.items():
cred.uuid = uuid
for key, session in self.sessions.items():
session.key = key
for key, token in self.reset_tokens.items():
token.key = key
def transaction(self, action, ctx=None, *, user=None):
"""Wrap writes in transaction. Delegates to JsonlStore."""
return self._store.transaction(action, ctx, user=user)