feat: AI对话系统 v1.0.0 - 网页端和Matrix端实时同步

models/database.py

@@ -0,0 +1,98 @@
+"""
+AI对话系统 - 数据库模型
+"""
+from sqlalchemy import create_engine, Column, Integer, String, Text, Boolean, DateTime, ForeignKey, JSON
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker, relationship
+from datetime import datetime
+import os
+
+DATABASE_URL = os.environ.get('DATABASE_URL', 'sqlite:///./ai_chat.db')
+
+engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+Base = declarative_base()
+
+
+class User(Base):
+    """用户表 - 支持网页用户和Matrix用户"""
+    __tablename__ = 'users'
+    
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(String(100), unique=True, index=True)  # 唯一标识：web_xxx 或 @xxx:matrix.org
+    display_name = Column(String(100))
+    user_type = Column(String(20), default='web')  # web 或 matrix
+    matrix_user_id = Column(String(200), nullable=True)  # Matrix用户ID
+    created_at = Column(DateTime, default=datetime.utcnow)
+    last_active_at = Column(DateTime, default=datetime.utcnow)
+    is_active = Column(Boolean, default=True)
+    
+    conversations = relationship("Conversation", back_populates="user")
+
+
+class Conversation(Base):
+    """对话会话"""
+    __tablename__ = 'conversations'
+    
+    id = Column(Integer, primary_key=True, index=True)
+    conversation_id = Column(String(100), unique=True, index=True)  # 会话唯一标识
+    user_id = Column(Integer, ForeignKey('users.id'))
+    title = Column(String(200), nullable=True)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    is_active = Column(Boolean, default=True)
+    extra_data = Column(JSON, nullable=True)  # 额外元数据
+    
+    user = relationship("User", back_populates="conversations")
+    messages = relationship("Message", back_populates="conversation")
+
+
+class Message(Base):
+    """消息表"""
+    __tablename__ = 'messages'
+    
+    id = Column(Integer, primary_key=True, index=True)
+    conversation_id = Column(Integer, ForeignKey('conversations.id'))
+    role = Column(String(20))  # user, assistant, system
+    content = Column(Text)
+    source = Column(String(20))  # web, matrix
+    created_at = Column(DateTime, default=datetime.utcnow)
+    extra_data = Column(JSON, nullable=True)  # 额外元数据（如Matrix event_id）
+    
+    conversation = relationship("Conversation", back_populates="messages")
+
+
+class SystemConfig(Base):
+    """系统配置表"""
+    __tablename__ = 'system_config'
+    
+    id = Column(Integer, primary_key=True, index=True)
+    key = Column(String(100), unique=True, index=True)
+    value = Column(Text)
+    description = Column(String(500))
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+
+class MatrixRoomMapping(Base):
+    """Matrix房间映射 - 绑定房间到用户会话"""
+    __tablename__ = 'matrix_room_mapping'
+    
+    id = Column(Integer, primary_key=True, index=True)
+    room_id = Column(String(200), unique=True, index=True)  # Matrix房间ID
+    user_id = Column(Integer, ForeignKey('users.id'))
+    conversation_id = Column(Integer, ForeignKey('conversations.id'))
+    created_at = Column(DateTime, default=datetime.utcnow)
+
+
+def init_db():
+    """初始化数据库"""
+    Base.metadata.create_all(bind=engine)
+
+
+def get_db():
+    """获取数据库会话"""
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()