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"""
MeshBay Hub — SQLAlchemy 2.0 ORM models.
Tables:
users — registered users (identity + public keys)
nodes — node announcements
groups — group registry
group_members — group membership
gek_bundles — encrypted GEK per (group, user)
refresh_tokens — hashed refresh tokens
ip_logs — connection log for legal compliance (1-year retention)
"""
import uuid
from datetime import datetime, timezone
from sqlalchemy import (
Boolean, DateTime, ForeignKey, Index, Integer,
String, Text, UniqueConstraint,
)
from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship
def _now() -> datetime:
return datetime.now(timezone.utc)
def _uuid() -> str:
return str(uuid.uuid4())
class Base(DeclarativeBase):
pass
# ── Users ─────────────────────────────────────────────────────────────────────
class User(Base):
__tablename__ = "users"
id: Mapped[str] = mapped_column(String(36), primary_key=True, default=_uuid)
username: Mapped[str] = mapped_column(String(64), unique=True, nullable=False)
email: Mapped[str] = mapped_column(String(256), nullable=False) # kept for recovery
pw_hash: Mapped[bytes] = mapped_column(nullable=False)
pw_salt: Mapped[bytes] = mapped_column(nullable=False)
pk_ed25519: Mapped[str] = mapped_column(String(64), nullable=False) # base64 raw 32B
pk_x25519: Mapped[str] = mapped_column(String(64), nullable=False) # base64 raw 32B
hub_id: Mapped[str] = mapped_column(String(128), nullable=False)
status: Mapped[str] = mapped_column(String(16), default="active") # active|suspended|revoked
created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=_now)
nodes: Mapped[list["Node"]] = relationship(back_populates="user")
group_memberships: Mapped[list["GroupMember"]] = relationship(back_populates="user")
gek_bundles: Mapped[list["GEKBundle"]] = relationship(back_populates="user")
refresh_tokens: Mapped[list["RefreshToken"]] = relationship(back_populates="user")
ip_logs: Mapped[list["IPLog"]] = relationship(back_populates="user")
__table_args__ = (
Index("ix_users_username", "username"),
Index("ix_users_email", "email"),
)
# ── Nodes ─────────────────────────────────────────────────────────────────────
class Node(Base):
__tablename__ = "nodes"
id: Mapped[str] = mapped_column(String(36), primary_key=True, default=_uuid)
user_id: Mapped[str] = mapped_column(ForeignKey("users.id"), nullable=False)
pk_node: Mapped[str] = mapped_column(String(64), nullable=False) # Ed25519 b64
endpoint_hint: Mapped[str | None] = mapped_column(String(128)) # "ip:port" or null
announced_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=_now)
user: Mapped["User"] = relationship(back_populates="nodes")
__table_args__ = (Index("ix_nodes_user_id", "user_id"),)
# ── Groups ────────────────────────────────────────────────────────────────────
class Group(Base):
__tablename__ = "groups"
id: Mapped[str] = mapped_column(String(36), primary_key=True, default=_uuid)
name: Mapped[str] = mapped_column(String(128), nullable=False)
admin_id: Mapped[str] = mapped_column(ForeignKey("users.id"), nullable=False)
visibility: Mapped[str] = mapped_column(String(16), default="private") # public|private
join_policy: Mapped[str] = mapped_column(String(16), default="invite") # open|request|invite
status: Mapped[str] = mapped_column(String(16), default="active") # active|revoked
created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=_now)
members: Mapped[list["GroupMember"]] = relationship(back_populates="group")
gek_bundles: Mapped[list["GEKBundle"]] = relationship(back_populates="group")
__table_args__ = (Index("ix_groups_name", "name"),)
class GroupMember(Base):
__tablename__ = "group_members"
group_id: Mapped[str] = mapped_column(ForeignKey("groups.id"), primary_key=True)
user_id: Mapped[str] = mapped_column(ForeignKey("users.id"), primary_key=True)
joined_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=_now)
group: Mapped["Group"] = relationship(back_populates="members")
user: Mapped["User"] = relationship(back_populates="group_memberships")
# ── GEK bundles ───────────────────────────────────────────────────────────────
class GEKBundle(Base):
"""Encrypted GEK bundle — opaque to the hub (hub cannot decrypt it)."""
__tablename__ = "gek_bundles"
group_id: Mapped[str] = mapped_column(ForeignKey("groups.id"), primary_key=True)
user_id: Mapped[str] = mapped_column(ForeignKey("users.id"), primary_key=True)
pk_eph_b64: Mapped[str] = mapped_column(String(64), nullable=False)
nonce_b64: Mapped[str] = mapped_column(String(32), nullable=False)
wrapped_b64: Mapped[str] = mapped_column(String(128), nullable=False)
stored_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=_now)
group: Mapped["Group"] = relationship(back_populates="gek_bundles")
user: Mapped["User"] = relationship(back_populates="gek_bundles")
# ── Refresh tokens ────────────────────────────────────────────────────────────
class RefreshToken(Base):
__tablename__ = "refresh_tokens"
id: Mapped[str] = mapped_column(String(36), primary_key=True, default=_uuid)
user_id: Mapped[str] = mapped_column(ForeignKey("users.id"), nullable=False)
token_hash: Mapped[str] = mapped_column(String(64), unique=True, nullable=False) # blake3 hex
expires_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=_now)
revoked: Mapped[bool] = mapped_column(Boolean, default=False)
user: Mapped["User"] = relationship(back_populates="refresh_tokens")
__table_args__ = (Index("ix_refresh_tokens_hash", "token_hash"),)
# ── IP logs (legal compliance) ────────────────────────────────────────────────
class ContentReport(Base):
"""
Report of a public content hash for moderation.
Two reports → automatic suspension. Third → admin review needed.
"""
__tablename__ = "content_reports"
id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
reporter_id: Mapped[str | None] = mapped_column(ForeignKey("users.id"))
content_hash: Mapped[str] = mapped_column(String(64), nullable=False) # blake3 hex
group_id: Mapped[str | None] = mapped_column(ForeignKey("groups.id"))
reason: Mapped[str] = mapped_column(String(32), default="illegal")
detail: Mapped[str | None] = mapped_column(String(256))
ip_address: Mapped[str] = mapped_column(String(45), nullable=False)
reported_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=_now)
__table_args__ = (
Index("ix_content_reports_hash", "content_hash"),
Index("ix_content_reports_group", "group_id"),
)
class ContentBlocklist(Base):
"""
Hash-based blocklist for public content.
Populated automatically after threshold reports, or manually by admins.
"""
__tablename__ = "content_blocklist"
content_hash: Mapped[str] = mapped_column(String(64), primary_key=True)
reason: Mapped[str] = mapped_column(String(64), nullable=False)
added_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=_now)
added_by: Mapped[str | None] = mapped_column(String(64)) # "auto" or admin username
class IPLog(Base):
"""
Connection log for legal compliance.
Retention: minimum 1 year (LCEN / EU e-Commerce Directive).
Events: account_create, login, login_fail, group_create, group_join, group_leave,
node_announce, token_refresh.
"""
__tablename__ = "ip_logs"
id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
user_id: Mapped[str | None] = mapped_column(ForeignKey("users.id")) # null for failed logins
event: Mapped[str] = mapped_column(String(32), nullable=False)
ip_address: Mapped[str] = mapped_column(String(45), nullable=False) # IPv4 or IPv6
detail: Mapped[str | None] = mapped_column(String(256)) # e.g. username on fail
timestamp: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=_now)
user: Mapped["User | None"] = relationship(back_populates="ip_logs")
__table_args__ = (
Index("ix_ip_logs_user_id", "user_id"),
Index("ix_ip_logs_timestamp", "timestamp"),
Index("ix_ip_logs_ip", "ip_address"),
)
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