72 lines
3.6 KiB
Python
72 lines
3.6 KiB
Python
"""
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Copyright 2024-2026 ChatterMate
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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"""
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from sqlalchemy import Column, Integer, String, JSON, ForeignKey, TIMESTAMP, func, UUID, Interval, Float, Index, text
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from sqlalchemy.orm import relationship
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from app.core.encryption import EncryptedText
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from app.database import Base
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class ChatHistory(Base):
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__tablename__ = "chat_history"
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__table_args__ = (
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# Every read of a conversation filters by session_id and orders by
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# (created_at, id) — the inbox previews, get_session_history, the AI's
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# context window. Declared here as well as in the migration so autogenerate
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# never proposes dropping it and the sqlite test schema matches Postgres.
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Index('ix_chat_history_session_created', 'session_id',
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text('created_at DESC'), text('id DESC')),
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# Delivery receipts look their message up by platform id
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Index('ix_chat_history_org_external_message', 'organization_id', 'external_message_id',
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postgresql_where=text('external_message_id IS NOT NULL'),
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sqlite_where=text('external_message_id IS NOT NULL')),
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)
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id = Column(Integer, primary_key=True, index=True)
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organization_id = Column(UUID(as_uuid=True), ForeignKey(
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"organizations.id", ondelete="SET NULL"), nullable=True)
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user_id = Column(UUID(as_uuid=True), ForeignKey(
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"users.id", ondelete="SET NULL"), nullable=True)
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customer_id = Column(UUID(as_uuid=True), ForeignKey(
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"customers.id", ondelete="SET NULL"), nullable=True)
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agent_id = Column(UUID(as_uuid=True), ForeignKey(
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"agents.id", ondelete="SET NULL"), nullable=True)
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session_id = Column(UUID(as_uuid=True), ForeignKey("session_to_agents.session_id"), nullable=True)
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# Encrypted at rest — see app.core.encryption. Storage stays text, so rows
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# written before the change read back as plaintext until the backfill lands.
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message = Column(EncryptedText, nullable=False)
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# 'user', 'bot', or 'agent'
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message_type = Column(String, nullable=False)
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attributes = Column(JSON, default={})
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sentiment_label = Column(String, nullable=True) # 'positive', 'neutral', 'negative'
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sentiment_score = Column(Float, nullable=True) # -1.0 to 1.0
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# Channel messages only: the platform's id for this message (WhatsApp wamid)
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# and its latest delivery receipt — app.channels.base.DeliveryState values.
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external_message_id = Column(String, nullable=True)
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channel_status = Column(String(16), nullable=True)
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channel_status_at = Column(TIMESTAMP(timezone=True), nullable=True)
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created_at = Column(TIMESTAMP(timezone=True), server_default=func.now())
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updated_at = Column(TIMESTAMP(timezone=True), server_default=func.now(),
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onupdate=func.now())
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# Relationships
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user = relationship("User", back_populates="chat_histories")
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customer = relationship("Customer", back_populates="chat_histories")
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agent = relationship("Agent", back_populates="chat_histories")
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organization = relationship("Organization", back_populates="chat_histories")
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session_assignment = relationship("SessionToAgent")
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