Split backend into multiple files

backend/models.py

@@ -0,0 +1,65 @@
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy import Column, Integer, String, Text, Boolean, DateTime, ForeignKey
+from sqlalchemy.orm import relationship
+from datetime import datetime
+from db import engine
+from pydantic import BaseModel
+
+Base = declarative_base()
+
+
+# Модели базы данных
+class User(Base):
+    __tablename__ = "user"
+
+    id = Column(Integer, primary_key=True, index=True)
+    username = Column(String(50), unique=True, nullable=False, index=True)
+    password_hash = Column(String(200), nullable=False)
+    online = Column(Boolean, default=False)
+    last_seen = Column(DateTime, default=datetime.now)
+    created_at = Column(DateTime, default=datetime.now)
+    messages = relationship("Message", back_populates="author", lazy="select")
+
+
+class Message(Base):
+    __tablename__ = "message"
+
+    id = Column(Integer, primary_key=True, index=True)
+    content = Column(Text, nullable=False)
+    timestamp = Column(DateTime, default=datetime.now)
+    user_id = Column(Integer, ForeignKey("user.id"), nullable=False)
+    is_read = Column(Boolean, default=False)
+
+    author = relationship("User", back_populates="messages")
+
+
+# Pydantic модели
+class LoginRequest(BaseModel):
+    username: str
+    password: str
+
+
+class RegisterRequest(BaseModel):
+    username: str
+    password: str
+    confirm_password: str
+
+
+class SendMessageRequest(BaseModel):
+    content: str
+
+
+class MessageResponse(BaseModel):
+    id: int
+    content: str
+    timestamp: datetime
+    is_author: bool
+    is_read: bool
+    username: str
+
+    class Config:
+        from_attributes = True
+
+
+# Создание таблиц
+Base.metadata.create_all(bind=engine)