Enterprise SAP RFID Integration for S/4HANA & Business One

import requests
from typing import List, Dict, Any

class SapB1ServiceLayerClient:
    """
    Connects to SAP Business One Service Layer via HTTPS.
    Maintains session state and executes automated Inventory Goods Receipts from RFID bursts.
    """
    def __init__(self, base_url: str, company_db: str, username: str, password: str):
        self.base_url = base_url.rstrip('/')
        self.company_db = company_db
        self.username = username
        self.password = password
        self.session = requests.Session()
        self.session.verify = True

    def login(self) -> bool:
        login_url = f"{self.base_url}/b1s/v2/Login"
        payload = {
            "CompanyDB": self.company_db,
            "UserName": self.username,
            "Password": self.password
        }
        res = self.session.post(login_url, json=payload, timeout=10)
        return res.status_code == 200

    def post_goods_receipt(self, warehouse_code: str, items: List[Dict[str, Any]]) -> Dict[str, Any]:
        endpoint = f"{self.base_url}/b1s/v2/InventoryGenEntries"
        doc_lines = []
        for it in items:
            line = {
                "ItemCode": it["item_code"],
                "Quantity": it["quantity"],
                "WarehouseCode": warehouse_code,
                "SerialNumbers": [{"InternalSerialNumber": sn} for sn in it.get("serials", [])]
            }
            doc_lines.append(line)

        payload = {"DocumentLines": doc_lines}
        res = self.session.post(endpoint, json=payload, timeout=15)
        if res.status_code in [200, 201]:
            return {"success": True, "doc_entry": res.json().get("DocEntry")}
        return {"success": False, "error": res.text}