79 lines
2.3 KiB
Python
79 lines
2.3 KiB
Python
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"""Permission delegation model — temporary permission handover between users.
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Allows a user to delegate their permissions to another user for a specified
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time period and scope.
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"""
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from __future__ import annotations
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import uuid
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from datetime import datetime
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from sqlalchemy import (
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Boolean,
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CheckConstraint,
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DateTime,
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ForeignKey,
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String,
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func,
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)
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from sqlalchemy.dialects.postgresql import JSONB, UUID as PGUUID
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from sqlalchemy.orm import Mapped, mapped_column
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from app.core.db import Base, TenantMixin
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class PermissionDelegation(Base, TenantMixin):
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"""Permission delegation — temporary handover of permissions.
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from_user_id delegates their permissions to to_user_id
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for the duration [start_at, end_at].
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scope: JSONB defining which permissions are delegated.
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Examples:
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- {"all": true} — all permissions
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- {"entity_types": ["contact", "document"]} — specific entity types
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- {"permissions": ["contacts:read", "contacts:write"]} — specific permissions
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"""
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__tablename__ = "permission_delegations"
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__table_args__ = (
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CheckConstraint(
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"end_at > start_at",
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name="ck_pd_end_after_start",
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),
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)
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id: Mapped[uuid.UUID] = mapped_column(
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PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
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)
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from_user_id: Mapped[uuid.UUID] = mapped_column(
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PGUUID(as_uuid=True),
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ForeignKey("users.id", ondelete="CASCADE"),
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nullable=False,
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index=True,
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)
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to_user_id: Mapped[uuid.UUID] = mapped_column(
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PGUUID(as_uuid=True),
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ForeignKey("users.id", ondelete="CASCADE"),
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nullable=False,
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index=True,
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)
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start_at: Mapped[datetime] = mapped_column(
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DateTime(timezone=True), nullable=False
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)
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end_at: Mapped[datetime] = mapped_column(
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DateTime(timezone=True), nullable=False
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)
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scope: Mapped[dict | None] = mapped_column(JSONB, nullable=True, default=None)
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active: Mapped[bool] = mapped_column(
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Boolean, nullable=False, default=True
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)
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created_at: Mapped[datetime] = mapped_column(
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DateTime(timezone=True), nullable=False, server_default=func.now()
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)
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updated_at: Mapped[datetime] = mapped_column(
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DateTime(timezone=True), nullable=False, server_default=func.now(),
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onupdate=func.now(),
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)
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