feat(avatar): add BOXIM chat takeover

digital-avatar-app/backend/models.py

@@ -1,6 +1,17 @@
 import uuid
 
-from sqlalchemy import Column, String, Integer, Float, DateTime, Text, JSON, Boolean
+from sqlalchemy import (
+    Boolean,
+    Column,
+    DateTime,
+    Float,
+    Index,
+    Integer,
+    JSON,
+    String,
+    Text,
+    UniqueConstraint,
+)
 from sqlalchemy.sql import func
 
 from database import Base
@@ -74,6 +85,76 @@ class Authorization(Base):
         }
 
 
+class TakeoverCursor(Base):
+    """Durable BOXIM polling cursor for one avatar owner."""
+
+    __tablename__ = "takeover_cursors"
+    id = Column(String, primary_key=True, default=lambda: uuid.uuid4().hex)
+    avatar_id = Column(String, nullable=False, unique=True, index=True)
+    owner_id = Column(String, nullable=False, default="", index=True)
+    boxim_owner_id = Column(String, default="")
+    last_message_id = Column(String, default="0")
+    initialized = Column(Boolean, default=False)
+    last_polled_at = Column(DateTime)
+    last_error = Column(Text, default="")
+    created_at = Column(DateTime, server_default=func.now())
+    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())
+
+
+class TakeoverMessage(Base):
+    """BOXIM message receipt used for audit, deduplication, and chat context."""
+
+    __tablename__ = "takeover_messages"
+    __table_args__ = (
+        UniqueConstraint("owner_id", "boxim_message_id", name="uq_takeover_message_owner_boxim"),
+        Index("ix_takeover_message_conversation", "owner_id", "peer_id", "send_time"),
+    )
+
+    id = Column(String, primary_key=True, default=lambda: uuid.uuid4().hex)
+    avatar_id = Column(String, nullable=False, index=True)
+    owner_id = Column(String, nullable=False, index=True)
+    boxim_message_id = Column(String, nullable=False)
+    boxim_local_id = Column(String, nullable=True)
+    peer_id = Column(String, nullable=False, index=True)
+    direction = Column(String, nullable=False)  # incoming | outgoing
+    message_type = Column(Integer, default=0)
+    content = Column(Text, default="")
+    is_avatar = Column(Boolean, default=False)
+    send_time = Column(DateTime, nullable=False)
+    created_at = Column(DateTime, server_default=func.now())
+
+
+class TakeoverReplyTask(Base):
+    """Restart-safe three-second BOXIM reply task."""
+
+    __tablename__ = "takeover_reply_tasks"
+    __table_args__ = (
+        UniqueConstraint("owner_id", "trigger_message_id", name="uq_takeover_task_owner_trigger"),
+        Index("ix_takeover_task_due", "status", "scheduled_at"),
+        Index("ix_takeover_task_conversation", "owner_id", "peer_id", "status"),
+    )
+
+    id = Column(String, primary_key=True, default=lambda: uuid.uuid4().hex)
+    avatar_id = Column(String, nullable=False, index=True)
+    owner_id = Column(String, nullable=False, index=True)
+    peer_id = Column(String, nullable=False, index=True)
+    trigger_message_id = Column(String, nullable=False)
+    source_message_ids = Column(JSON, default=list)
+    prompt = Column(Text, default="")
+    response_text = Column(Text, default="")
+    status = Column(String, default="pending")
+    scheduled_at = Column(DateTime, nullable=False)
+    locked_at = Column(DateTime)
+    sent_at = Column(DateTime)
+    attempts = Column(Integer, default=0)
+    last_error = Column(Text, default="")
+    cancel_reason = Column(String, default="")
+    boxim_local_id = Column(String, nullable=False)
+    boxim_sent_message_id = Column(String, default="")
+    created_at = Column(DateTime, server_default=func.now())
+    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())
+
+
 class Organization(Base):
     __tablename__ = "organizations"
     id = Column(String, primary_key=True, default=lambda: uuid.uuid4().hex)