add username change and logout

1 files changed, 32 insertions, 17 deletions

diff --git a/app/utils/db.py b/app/utils/db.py
index 5531998..d3c7318 100644
--- a/app/utils/db.py
+++ b/app/utils/db.py
@@ -1,7 +1,6 @@
 import os
-from typing import AsyncGenerator
+from typing import AsyncGenerator, Optional
 
-from dotenv import load_dotenv
 from sqlalchemy.ext.asyncio import (
     AsyncEngine,
     AsyncSession,
@@ -10,29 +9,45 @@ from sqlalchemy.ext.asyncio import (
 )
 from sqlalchemy.orm import DeclarativeBase
 
-load_dotenv()
+engine: Optional[AsyncEngine] = None
+async_session: Optional[async_sessionmaker[AsyncSession]] = None
 
-DATABASE_URL = os.getenv("DATABASE_URL")
-if not DATABASE_URL:
-    raise ValueError("DATABASE_URL not found in .env")
 
+class Base(DeclarativeBase):
+    pass
 
-engine: AsyncEngine = create_async_engine(
-    DATABASE_URL,
-    echo=True,
-    pool_pre_ping=True,
-)
 
-async_session = async_sessionmaker(
-    bind=engine,
-    expire_on_commit=False,
-)
+def init_db_engine() -> None:
+    global engine, async_session
 
+    database_url = os.getenv("DATABASE_URL")
 
-class Base(DeclarativeBase):
-    pass
+    if not database_url:
+        raise RuntimeError("DATABASE_URL not found in environment")
+
+    engine = create_async_engine(
+        database_url,
+        echo=True,
+        pool_pre_ping=True,
+    )
+
+    async_session = async_sessionmaker(
+        bind=engine,
+        expire_on_commit=False,
+    )
+
+
+def get_engine() -> AsyncEngine:
+    if engine is None:
+        raise RuntimeError(
+            "DB engine not initialized. Call init_db_engine() first."
+        )
+    return engine
 
 
 async def get_async_session() -> AsyncGenerator[AsyncSession, None]:
+    if async_session is None:
+        raise RuntimeError("DB not initialized. Call init_db_engine() first.")
+
     async with async_session() as session:
         yield session