init

backend/app/db/__init__.py

@@ -0,0 +1,11 @@
+from app.db.base import Base, get_db, init_db
+from app.db.models import ChatSession, Message, PomodoroSession
+
+__all__ = [
+    "Base",
+    "ChatSession",
+    "Message",
+    "PomodoroSession",
+    "get_db",
+    "init_db",
+]

backend/app/db/base.py

@@ -0,0 +1,39 @@
+from collections.abc import Generator
+from pathlib import Path
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import DeclarativeBase, Session, sessionmaker
+
+from app.config import get_settings
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+def _ensure_sqlite_dir(database_url: str) -> None:
+    if database_url.startswith("sqlite:///"):
+        db_path = database_url.replace("sqlite:///", "", 1)
+        Path(db_path).parent.mkdir(parents=True, exist_ok=True)
+
+
+settings = get_settings()
+_ensure_sqlite_dir(settings.database_url)
+
+connect_args = {"check_same_thread": False} if settings.database_url.startswith("sqlite") else {}
+engine = create_engine(settings.database_url, connect_args=connect_args)
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+
+def init_db() -> None:
+    from app.db import models  # noqa: F401
+
+    Base.metadata.create_all(bind=engine)
+
+
+def get_db() -> Generator[Session, None, None]:
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()

backend/app/db/models.py

@@ -0,0 +1,51 @@
+from datetime import datetime
+
+from sqlalchemy import Boolean, DateTime, ForeignKey, Integer, String, Text, func
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.db.base import Base
+
+
+class ChatSession(Base):
+    __tablename__ = "chat_sessions"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    title: Mapped[str] = mapped_column(String(255), default="Новый чат")
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), server_default=func.now(), onupdate=func.now()
+    )
+
+    messages: Mapped[list["Message"]] = relationship(
+        back_populates="session", cascade="all, delete-orphan", order_by="Message.created_at"
+    )
+
+
+class Message(Base):
+    __tablename__ = "messages"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    session_id: Mapped[int] = mapped_column(ForeignKey("chat_sessions.id", ondelete="CASCADE"), index=True)
+    role: Mapped[str] = mapped_column(String(32))
+    content: Mapped[str] = mapped_column(Text, default="")
+    tool_calls_json: Mapped[str | None] = mapped_column(Text, nullable=True)
+    tool_call_id: Mapped[str | None] = mapped_column(String(64), nullable=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+
+    session: Mapped["ChatSession"] = relationship(back_populates="messages")
+
+
+class PomodoroSession(Base):
+    __tablename__ = "pomodoro_sessions"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    status: Mapped[str] = mapped_column(String(32), default="idle")
+    duration_min: Mapped[int] = mapped_column(Integer, default=25)
+    task_note: Mapped[str] = mapped_column(Text, default="")
+    result: Mapped[str | None] = mapped_column(Text, nullable=True)
+    completed: Mapped[bool] = mapped_column(Boolean, default=False)
+    started_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    paused_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    elapsed_seconds: Mapped[int] = mapped_column(Integer, default=0)
+    finished_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())