Initial commit: XDL Twitter/X video downloader

backend/app/database.py

@@ -0,0 +1,23 @@
+"""Database configuration and session management."""
+import os
+from sqlalchemy.ext.asyncio import create_async_engine, async_sessionmaker, AsyncSession
+from sqlalchemy.orm import DeclarativeBase
+
+DATABASE_URL = os.getenv("DATABASE_URL", "sqlite+aiosqlite:///./xdl.db")
+
+engine = create_async_engine(DATABASE_URL, echo=False)
+async_session = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+async def get_db():
+    async with async_session() as session:
+        yield session
+
+
+async def init_db():
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)