Refactor code structure for improved readability and maintainability

app/core/__init__.py

@@ -0,0 +1 @@
+"""Core package."""

app/core/config.py

@@ -0,0 +1,23 @@
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    """Application settings."""
+
+    model_config = SettingsConfigDict(
+        env_file=".env",
+        env_file_encoding="utf-8",
+        env_ignore_empty=True,
+        extra="ignore",
+    )
+
+    HOST: str = "localhost"
+    PORT: int = 8000
+    RELOAD: bool = True
+    LOG_LEVEL: str = "info"
+
+    DATABASE_URL: str = "sqlite+aiosqlite:///data/soundboard.db"
+    DATABASE_ECHO: bool = False
+
+
+settings = Settings()

app/core/database.py

@@ -0,0 +1,38 @@
+from collections.abc import AsyncGenerator
+
+from sqlalchemy.ext.asyncio import AsyncEngine, create_async_engine
+from sqlmodel import SQLModel
+from sqlmodel.ext.asyncio.session import AsyncSession
+
+from app.core.config import settings
+from app.models import (  # noqa: F401
+    plan,
+    playlist,
+    playlist_sound,
+    sound,
+    sound_played,
+    stream,
+    user,
+    user_oauth,
+)
+
+engine: AsyncEngine = create_async_engine(
+    settings.DATABASE_URL,
+    echo=settings.DATABASE_ECHO,
+)
+
+
+async def get_db() -> AsyncGenerator[AsyncSession, None]:
+    async with AsyncSession(engine) as session:
+        try:
+            yield session
+        except Exception:
+            await session.rollback()
+            raise
+        finally:
+            await session.close()
+
+
+async def init_db() -> None:
+    async with engine.begin() as conn:
+        await conn.run_sync(SQLModel.metadata.create_all)