add create get exchange endpoint

backend/app.py

@@ -12,7 +12,7 @@ from fastapi.responses import JSONResponse
 import settings
 from trading_journal import db, service
 from trading_journal.db import Database
-from trading_journal.dto import SessionsBase, SessionsCreate, UserCreate, UserLogin, UserRead
+from trading_journal.dto import ExchangesBase, SessionsBase, SessionsCreate, UserCreate, UserLogin, UserRead
 
 _db = db.create_database(settings.settings.database_url)
 
@@ -96,12 +96,37 @@ async def login(request: Request, user_in: UserLogin) -> SessionsBase:
 
 
 # Exchange
-# @app.post(f"{settings.settings.api_base}/exchanges")
-# async def create_exchange(request: Request, name: str, notes: str | None) -> dict:
-
-
-@app.get(f"{settings.settings.api_base}/trades")
-async def get_trades(request: Request) -> list:
+@app.post(f"{settings.settings.api_base}/exchanges")
+async def create_exchange(request: Request, exchange_data: ExchangesBase) -> dict:
     db_factory: Database = request.app.state.db_factory
-    with db_factory.get_session_ctx_manager() as db:
-        return service.get_trades_service(db, request.state.user_id)
+
+    def sync_work() -> ExchangesBase:
+        with db_factory.get_session_ctx_manager() as db:
+            return service.create_exchange_service(db, request.state.user_id, exchange_data.name, exchange_data.notes)
+
+    try:
+        exchange = await asyncio.to_thread(sync_work)
+        return JSONResponse(status_code=status.HTTP_201_CREATED, content=exchange.model_dump())
+    except service.ExchangeAlreadyExistsError as e:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e)) from e
+    except Exception as e:
+        logger.exception("Failed to create exchange: \n")
+        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Internal server error") from e
+
+
+@app.get(f"{settings.settings.api_base}/exchanges")
+async def get_exchanges(request: Request) -> list[ExchangesBase]:
+    db_factory: Database = request.app.state.db_factory
+
+    def sync_work() -> list[ExchangesBase]:
+        with db_factory.get_session_ctx_manager() as db:
+            return service.get_exchanges_by_user_service(db, request.state.user_id)
+
+    try:
+        return await asyncio.to_thread(sync_work)
+    except Exception as e:
+        logger.exception("Failed to get exchanges: \n")
+        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Internal server error") from e
+
+
+# Trade