feat: configuration FastAPI et moteur SQLAlchemy async

backend/app/core/config.py

@@ -0,0 +1,21 @@
+from pydantic_settings import BaseSettings, SettingsConfigDict
+from pathlib import Path
+
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(env_file=".env", env_file_encoding="utf-8")
+
+    database_url: str = "postgresql+asyncpg://homehub:homehub@localhost:5432/homehub"
+    upload_dir: str = "/uploads"
+    cors_origins: str = "http://localhost:3000"
+
+    @property
+    def cors_origins_list(self) -> list[str]:
+        return [o.strip() for o in self.cors_origins.split(",")]
+
+    @property
+    def upload_path(self) -> Path:
+        return Path(self.upload_dir)
+
+
+settings = Settings()

backend/app/core/database.py

@@ -0,0 +1,15 @@
+from sqlalchemy.ext.asyncio import create_async_engine, async_sessionmaker, AsyncSession
+from sqlalchemy.orm import DeclarativeBase
+from app.core.config import settings
+
+engine = create_async_engine(settings.database_url, pool_pre_ping=True)
+AsyncSessionLocal = async_sessionmaker(engine, expire_on_commit=False)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+async def get_session() -> AsyncSession:
+    async with AsyncSessionLocal() as session:
+        yield session