WIP: initial fastapi endpoint implementation

Client endpoint - GET & POST implemented

backend/app/api/clients/endpoints.py

@@ -0,0 +1,31 @@
+"""
+The Client table
+"""
+from fastapi import APIRouter, HTTPException 
+from sqlmodel import Session, select
+from app.api.deps import SessionDep, exists
+from app.schemas.models import Client
+from app.schemas.schemas import ClientCreate
+from typing import Sequence
+
+router = APIRouter(prefix="/clients", tags=["clients"])
+
+
+@router.get("/", response_model=Client)
+def fetch_clients(client: Client, session: SessionDep) -> Sequence[Client]:
+    """Fetch client list
+    """
+    clients = session.exec(select(Client)).all()
+    return clients
+
+
+@router.post("/", response_model=ClientCreate)
+def create_client(client_data: ClientCreate, session: SessionDep) -> Client:
+    existing = exists(session, Client, tin_number=client_data.tin_number)
+    if existing:
+        raise HTTPException(status_code=400, detail="Client with this tin number already exists")
+    client = Client.model_validate(client_data)
+    session.add(client)
+    session.commit()
+    session.refresh(client)
+    return client