first

src/SapBusinessOneServiceLayer.ts

@@ -0,0 +1,36 @@
+import { SapB1Client, SapB1ClientOptions } from "./client/SapB1Client";
+import { SapB1Config } from "./config";
+import { BusinessPartnersResource } from "./resources/BusinessPartners";
+import { DeliveryNotesResource, InvoicesResource, OrdersResource, PurchaseOrdersResource } from "./resources/Documents";
+import { ItemsResource } from "./resources/Items";
+import { StockTransfersResource } from "./resources/StockTransfers";
+
+export class SapBusinessOneServiceLayer {
+  public readonly client: SapB1Client;
+  public readonly businessPartners: BusinessPartnersResource;
+  public readonly items: ItemsResource;
+  public readonly orders: OrdersResource;
+  public readonly invoices: InvoicesResource;
+  public readonly purchaseOrders: PurchaseOrdersResource;
+  public readonly deliveryNotes: DeliveryNotesResource;
+  public readonly stockTransfers: StockTransfersResource;
+
+  public constructor(config: SapB1Config, options: SapB1ClientOptions = {}) {
+    this.client = new SapB1Client(config, options);
+    this.businessPartners = new BusinessPartnersResource(this.client);
+    this.items = new ItemsResource(this.client);
+    this.orders = new OrdersResource(this.client);
+    this.invoices = new InvoicesResource(this.client);
+    this.purchaseOrders = new PurchaseOrdersResource(this.client);
+    this.deliveryNotes = new DeliveryNotesResource(this.client);
+    this.stockTransfers = new StockTransfersResource(this.client);
+  }
+
+  public login(): Promise<unknown> {
+    return this.client.login();
+  }
+
+  public logout(): Promise<void> {
+    return this.client.logout();
+  }
+}

src/auth/SessionManager.ts

@@ -0,0 +1,133 @@
+import "../client/axiosTypes";
+import { AxiosInstance } from "axios";
+import { z } from "zod";
+import { SapB1Config } from "../config";
+import { SapB1Error } from "../errors/SapB1Error";
+import { SapB1Logger, noopLogger, sanitizeLogMeta } from "../utils/logger";
+
+const LoginResponseSchema = z.object({
+  SessionId: z.string().optional(),
+  Version: z.string().optional(),
+  SessionTimeout: z.number().optional()
+});
+
+export interface SapB1Session {
+  b1session: string;
+  routeId?: string;
+  expiresAt?: number;
+}
+
+export class SessionManager {
+  private session?: SapB1Session;
+  private loginPromise?: Promise<SapB1Session>;
+
+  public constructor(
+    private readonly http: AxiosInstance,
+    private readonly config: SapB1Config,
+    private readonly logger: SapB1Logger = noopLogger
+  ) {}
+
+  public get currentSession(): SapB1Session | undefined {
+    return this.session;
+  }
+
+  public async getSession(forceRefresh = false): Promise<SapB1Session> {
+    if (!forceRefresh && this.session && !this.isExpired(this.session)) {
+      return this.session;
+    }
+
+    if (!this.loginPromise) {
+      this.loginPromise = this.login().finally(() => {
+        this.loginPromise = undefined;
+      });
+    }
+
+    return this.loginPromise;
+  }
+
+  public async login(): Promise<SapB1Session> {
+    this.logger.info("SAP B1 login request", sanitizeLogMeta({ baseUrl: this.config.baseUrl, companyDB: this.config.companyDB }));
+
+    try {
+      const response = await this.http.post(
+        "/Login",
+        {
+          CompanyDB: this.config.companyDB,
+          UserName: this.config.username,
+          Password: this.config.password,
+          Language: this.config.language
+        },
+        { skipAuth: true }
+      );
+
+      LoginResponseSchema.parse(response.data);
+      const cookies = this.extractCookies(response.headers["set-cookie"]);
+      const b1session = cookies.B1SESSION || response.data.SessionId;
+
+      if (!b1session) {
+        throw new SapB1Error({ message: "SAP B1 login did not return B1SESSION cookie or SessionId" });
+      }
+
+      const timeoutMinutes = typeof response.data.SessionTimeout === "number" ? response.data.SessionTimeout : 30;
+      this.session = {
+        b1session,
+        routeId: cookies.ROUTEID,
+        expiresAt: Date.now() + Math.max(timeoutMinutes - 1, 1) * 60_000
+      };
+
+      return this.session;
+    } catch (error) {
+      if (error instanceof SapB1Error) {
+        throw error;
+      }
+
+      throw new SapB1Error({ message: "SAP B1 login failed", cause: error });
+    }
+  }
+
+  public async logout(): Promise<void> {
+    if (!this.session) {
+      return;
+    }
+
+    try {
+      await this.http.post("/Logout", undefined, { skipAuth: false });
+    } finally {
+      this.session = undefined;
+    }
+  }
+
+  public buildCookieHeader(session: SapB1Session): string {
+    const parts = [`B1SESSION=${session.b1session}`];
+
+    if (session.routeId) {
+      parts.push(`ROUTEID=${session.routeId}`);
+    }
+
+    return parts.join("; ");
+  }
+
+  public clearSession(): void {
+    this.session = undefined;
+  }
+
+  private isExpired(session: SapB1Session): boolean {
+    return session.expiresAt !== undefined && session.expiresAt <= Date.now();
+  }
+
+  private extractCookies(setCookieHeader: string[] | string | undefined): Record<string, string> {
+    const headers = Array.isArray(setCookieHeader) ? setCookieHeader : setCookieHeader ? [setCookieHeader] : [];
+    const cookies: Record<string, string> = {};
+
+    for (const header of headers) {
+      const [nameValue] = header.split(";");
+      const separatorIndex = nameValue.indexOf("=");
+
+      if (separatorIndex > 0) {
+        cookies[nameValue.slice(0, separatorIndex)] = nameValue.slice(separatorIndex + 1);
+      }
+    }
+
+    return cookies;
+  }
+}

src/client/SapB1Client.ts

@@ -0,0 +1,170 @@
+import "./axiosTypes";
+import https from "node:https";
+import axios, { AxiosError, AxiosInstance, AxiosRequestConfig, Method } from "axios";
+import { z } from "zod";
+import { SessionManager } from "../auth/SessionManager";
+import { SapB1Config, SapB1ConfigSchema } from "../config";
+import { SapB1Error } from "../errors/SapB1Error";
+import { ODataQuery, ODataResponse } from "../types/odata";
+import { buildODataParams, extractNextLink } from "./odata";
+import { SapB1Logger, noopLogger, sanitizeLogMeta } from "../utils/logger";
+import { sleep } from "../utils/sleep";
+
+export interface SapB1ClientOptions {
+  logger?: SapB1Logger;
+  http?: AxiosInstance;
+}
+
+export class SapB1Client {
+  private readonly http: AxiosInstance;
+  private readonly logger: SapB1Logger;
+  public readonly sessionManager: SessionManager;
+  public readonly config: SapB1Config;
+
+  public constructor(config: SapB1Config, options: SapB1ClientOptions = {}) {
+    this.config = SapB1ConfigSchema.parse(config);
+    this.logger = options.logger ?? noopLogger;
+    this.http =
+      options.http ??
+      axios.create({
+        baseURL: this.buildServiceLayerBaseUrl(this.config.baseUrl),
+        timeout: this.config.timeout,
+        httpsAgent: new https.Agent({ rejectUnauthorized: this.config.rejectUnauthorized })
+      });
+    this.sessionManager = new SessionManager(this.http, this.config, this.logger);
+  }
+
+  public login(): Promise<unknown> {
+    return this.sessionManager.getSession(true);
+  }
+
+  public logout(): Promise<void> {
+    return this.sessionManager.logout();
+  }
+
+  public get<T>(path: string, query?: ODataQuery, schema?: z.ZodType<T>): Promise<T> {
+    return this.request<T>("GET", path, undefined, { params: buildODataParams(query), schema });
+  }
+
+  public post<T>(path: string, data?: unknown, schema?: z.ZodType<T>): Promise<T> {
+    return this.request<T>("POST", path, data, { schema });
+  }
+
+  public patch<T>(path: string, data?: unknown, schema?: z.ZodType<T>): Promise<T> {
+    return this.request<T>("PATCH", path, data, { schema });
+  }
+
+  public delete<T>(path: string, schema?: z.ZodType<T>): Promise<T> {
+    return this.request<T>("DELETE", path, undefined, { schema });
+  }
+
+  public async getAll<T>(path: string, query: ODataQuery = {}, schema?: z.ZodType<T>): Promise<T[]> {
+    const items: T[] = [];
+    let nextPath: string | undefined = path;
+    let nextQuery: ODataQuery | undefined = query;
+
+    while (nextPath) {
+      const response: ODataResponse<T> = await this.get<ODataResponse<T>>(nextPath, nextQuery);
+      const value = schema ? z.array(schema).parse(response.value) : response.value;
+      items.push(...value);
+      const nextLink: string | undefined = extractNextLink(response);
+      nextPath = nextLink ? this.normalizeNextLink(nextLink) : undefined;
+      nextQuery = undefined;
+    }
+
+    return items;
+  }
+
+  private async request<T>(
+    method: Method,
+    path: string,
+    data?: unknown,
+    options: AxiosRequestConfig & { schema?: z.ZodType<T> } = {}
+  ): Promise<T> {
+    const requestConfig: AxiosRequestConfig = {
+      ...options,
+      method,
+      url: path,
+      data,
+      headers: {
+        ...(options.headers || {})
+      }
+    };
+
+    for (let attempt = 0; attempt <= this.config.retryCount; attempt += 1) {
+      try {
+        if (!requestConfig.skipAuth) {
+          const session = await this.sessionManager.getSession();
+          requestConfig.headers = {
+            ...(requestConfig.headers || {}),
+            Cookie: this.sessionManager.buildCookieHeader(session)
+          };
+        }
+
+        this.logger.debug("SAP B1 request", sanitizeLogMeta({ method, url: path, attempt }));
+        const response = await this.http.request(requestConfig);
+        return options.schema ? options.schema.parse(response.data) : (response.data as T);
+      } catch (error) {
+        const sapError = this.toSapB1Error(error, method, path);
+        const canRelogin = sapError.status === 401 && !requestConfig.skipAuth && attempt === 0;
+
+        if (canRelogin) {
+          this.sessionManager.clearSession();
+          await this.sessionManager.getSession(true);
+          continue;
+        }
+
+        if (!requestConfig.skipRetry && sapError.retryable && attempt < this.config.retryCount) {
+          await sleep(this.config.retryDelayMs * (attempt + 1));
+          continue;
+        }
+
+        throw sapError;
+      }
+    }
+
+    throw new SapB1Error({ message: "SAP B1 request failed after retries", method, url: path });
+  }
+
+  private toSapB1Error(error: unknown, method: Method, path: string): SapB1Error {
+    if (error instanceof SapB1Error) {
+      return error;
+    }
+
+    if (axios.isAxiosError(error)) {
+      const axiosError = error as AxiosError<{ error?: { code?: string; message?: { value?: string } | string } }>;
+      const status = axiosError.response?.status;
+      const sapError = axiosError.response?.data?.error;
+      const message =
+        typeof sapError?.message === "string"
+          ? sapError.message
+          : sapError?.message?.value || axiosError.message || "SAP B1 request failed";
+
+      return new SapB1Error({
+        status,
+        code: sapError?.code,
+        message,
+        method,
+        url: path,
+        retryable: status === 408 || status === 429 || (status !== undefined && status >= 500),
+        cause: error
+      });
+    }
+
+    return new SapB1Error({ message: "SAP B1 request failed", method, url: path, cause: error });
+  }
+
+  private buildServiceLayerBaseUrl(baseUrl: string): string {
+    const trimmed = baseUrl.replace(/\/+$/, "");
+    return trimmed.endsWith("/b1s/v1") ? trimmed : `${trimmed}/b1s/v1`;
+  }
+
+  private normalizeNextLink(nextLink: string): string {
+    try {
+      const parsed = new URL(nextLink);
+      return parsed.pathname.replace(/^.*\/b1s\/v1\/?/, "");
+    } catch {
+      return nextLink.replace(/^\/?b1s\/v1\/?/, "");
+    }
+  }
+}

src/client/axiosTypes.ts

@@ -0,0 +1,8 @@
+import "axios";
+
+declare module "axios" {
+  export interface AxiosRequestConfig {
+    skipAuth?: boolean;
+    skipRetry?: boolean;
+  }
+}

src/client/odata.ts

@@ -0,0 +1,35 @@
+import { ODataQuery, ODataQuerySchema } from "../types/odata";
+
+export function buildODataParams(query: ODataQuery = {}): Record<string, string | number> {
+  const parsed = ODataQuerySchema.parse(query);
+  const params: Record<string, string | number> = {};
+
+  if (parsed.select?.length) {
+    params.$select = parsed.select.join(",");
+  }
+
+  if (parsed.filter) {
+    params.$filter = parsed.filter;
+  }
+
+  if (parsed.top !== undefined) {
+    params.$top = parsed.top;
+  }
+
+  if (parsed.skip !== undefined) {
+    params.$skip = parsed.skip;
+  }
+
+  if (parsed.orderby) {
+    params.$orderby = Array.isArray(parsed.orderby) ? parsed.orderby.join(",") : parsed.orderby;
+  }
+
+  return params;
+}
+
+export function extractNextLink<T>(response: {
+  "odata.nextLink"?: string;
+  "@odata.nextLink"?: string;
+}): string | undefined {
+  return response["@odata.nextLink"] || response["odata.nextLink"];
+}

src/config.ts

@@ -0,0 +1,47 @@
+import "dotenv/config";
+import { z } from "zod";
+
+const booleanFromEnv = z
+  .union([z.boolean(), z.string()])
+  .optional()
+  .transform((value) => {
+    if (typeof value === "boolean") {
+      return value;
+    }
+
+    if (value === undefined || value === "") {
+      return undefined;
+    }
+
+    return ["1", "true", "yes", "on"].includes(value.toLowerCase());
+  });
+
+export const SapB1ConfigSchema = z.object({
+  baseUrl: z.string().url(),
+  companyDB: z.string().min(1),
+  username: z.string().min(1),
+  password: z.string().min(1),
+  language: z.string().min(1).optional(),
+  timeout: z.number().int().positive().default(30_000),
+  rejectUnauthorized: z.boolean().default(true),
+  retryCount: z.number().int().min(0).default(2),
+  retryDelayMs: z.number().int().min(0).default(250)
+});
+
+export type SapB1Config = z.infer<typeof SapB1ConfigSchema>;
+
+export function loadSapB1ConfigFromEnv(env: NodeJS.ProcessEnv = process.env): SapB1Config {
+  const rejectUnauthorized = booleanFromEnv.parse(env.SAP_B1_REJECT_UNAUTHORIZED);
+
+  return SapB1ConfigSchema.parse({
+    baseUrl: env.SAP_B1_BASE_URL,
+    companyDB: env.SAP_B1_COMPANY_DB,
+    username: env.SAP_B1_USERNAME,
+    password: env.SAP_B1_PASSWORD,
+    language: env.SAP_B1_LANGUAGE || undefined,
+    timeout: env.SAP_B1_TIMEOUT_MS ? Number(env.SAP_B1_TIMEOUT_MS) : undefined,
+    rejectUnauthorized,
+    retryCount: env.SAP_B1_RETRY_COUNT ? Number(env.SAP_B1_RETRY_COUNT) : undefined,
+    retryDelayMs: env.SAP_B1_RETRY_DELAY_MS ? Number(env.SAP_B1_RETRY_DELAY_MS) : undefined
+  });
+}

src/errors/SapB1Error.ts

@@ -0,0 +1,29 @@
+export interface SapB1ErrorDetails {
+  status?: number;
+  code?: string;
+  message?: string;
+  method?: string;
+  url?: string;
+  retryable?: boolean;
+  cause?: unknown;
+}
+
+export class SapB1Error extends Error {
+  public readonly status?: number;
+  public readonly code?: string;
+  public readonly method?: string;
+  public readonly url?: string;
+  public readonly retryable: boolean;
+  public override readonly cause?: unknown;
+
+  public constructor(details: SapB1ErrorDetails) {
+    super(details.message || "SAP Business One Service Layer request failed");
+    this.name = "SapB1Error";
+    this.status = details.status;
+    this.code = details.code;
+    this.method = details.method;
+    this.url = details.url;
+    this.retryable = details.retryable ?? false;
+    this.cause = details.cause;
+  }
+}

src/index.ts

@@ -1,35 +1,145 @@
 import express from "express";
+import { SapBusinessOneServiceLayer } from "./SapBusinessOneServiceLayer";
+
+export { SessionManager, SapB1Session } from "./auth/SessionManager";
+export { SapB1Client, SapB1ClientOptions } from "./client/SapB1Client";
+export { buildODataParams, extractNextLink } from "./client/odata";
+export { loadSapB1ConfigFromEnv, SapB1Config, SapB1ConfigSchema } from "./config";
+export { SapB1Error } from "./errors/SapB1Error";
+export { SapBusinessOneServiceLayer } from "./SapBusinessOneServiceLayer";
+export * from "./types/entities";
+export * from "./types/odata";
 
 const app = express();
 const port = Number(process.env.PORT || 3000);
 const rootPath = process.env.ROOT_PATH || "";
+const serviceName = "SAP Business One";
+const serviceId = "sap-bo";
+
+function openApiDocument(basePath = "") {
+  return {
+    openapi: "3.0.3",
+    info: {
+      title: "SAP Business One connector service",
+      version: "1.0.0",
+      description: "Health and documentation wrapper for the SAP Business One Service Layer TypeScript connector."
+    },
+    servers: [{ url: basePath || "/" }],
+    paths: {
+      "/": {
+        get: {
+          summary: "Service metadata",
+          responses: {
+            "200": { description: "Service status" }
+          }
+        }
+      },
+      "/health": {
+        get: {
+          summary: "Health check",
+          responses: {
+            "200": { description: "Service is ready to accept traffic" }
+          }
+        }
+      },
+      "/openapi.json": {
+        get: {
+          summary: "OpenAPI schema",
+          responses: {
+            "200": { description: "OpenAPI document" }
+          }
+        }
+      }
+    }
+  };
+}
+
+function docsHtml(basePath = "") {
+  const openApiUrl = `${basePath}/openapi.json`.replace("//", "/");
+
+  return `<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>SAP Business One connector docs</title>
+    <style>
+      body { font-family: Arial, sans-serif; margin: 2rem; line-height: 1.5; color: #1f2937; }
+      code, pre { background: #f3f4f6; border-radius: 4px; padding: 0.2rem 0.35rem; }
+      a { color: #0f766e; }
+    </style>
+  </head>
+  <body>
+    <h1>SAP Business One connector</h1>
+    <p>This service exposes AppFactory health and OpenAPI metadata. The connector itself is used as a TypeScript library.</p>
+    <ul>
+      <li><a href="${openApiUrl}">OpenAPI JSON</a></li>
+      <li><code>GET ${basePath || ""}/health</code></li>
+    </ul>
+    <button type="button" id="try-health">Try health</button>
+    <button type="button" id="try-openapi">Try OpenAPI</button>
+    <pre id="result" aria-live="polite"></pre>
+    <script>
+      const result = document.getElementById("result");
+      async function show(url) {
+        const response = await fetch(url);
+        const contentType = response.headers.get("content-type") || "";
+        const body = contentType.includes("application/json") ? await response.json() : await response.text();
+        result.textContent = JSON.stringify({ status: response.status, body }, null, 2);
+      }
+      document.getElementById("try-health").addEventListener("click", () => show("${basePath}/health".replace("//", "/")));
+      document.getElementById("try-openapi").addEventListener("click", () => show("${openApiUrl}"));
+    </script>
+  </body>
+</html>`;
+}
+
+function serviceMetadata() {
+  return {
+    name: serviceName,
+    service: serviceId,
+    status: "ok"
+  };
+}
 
 app.get("/", (_req, res) => {
-  res.json({
-    name: "SAP Business One",
-    service: "sap-bo",
-    status: "ok"
-  });
+  res.json(serviceMetadata());
 });
 
 app.get("/health", (_req, res) => {
   res.json({ status: "ok" });
 });
 
+app.get("/openapi.json", (_req, res) => {
+  res.json(openApiDocument(rootPath));
+});
+
+app.get("/docs", (_req, res) => {
+  res.type("html").send(docsHtml(rootPath));
+});
+
 if (rootPath) {
   app.get(rootPath, (_req, res) => {
-    res.json({
-      name: "SAP Business One",
-      service: "sap-bo",
-      status: "ok"
-    });
+    res.json(serviceMetadata());
   });
 
   app.get(rootPath + "/health", (_req, res) => {
     res.json({ status: "ok" });
   });
+
+  app.get(rootPath + "/openapi.json", (_req, res) => {
+    res.json(openApiDocument(rootPath));
+  });
+
+  app.get(rootPath + "/docs", (_req, res) => {
+    res.type("html").send(docsHtml(rootPath));
+  });
 }
 
-app.listen(port, "0.0.0.0", () => {
-  console.log("sap-bo listening on port " + port);
-});
+if (require.main === module) {
+  app.listen(port, "0.0.0.0", () => {
+    console.log(serviceId + " listening on port " + port);
+  });
+}
+
+export { app };

src/resources/BusinessPartners.ts

@@ -0,0 +1,15 @@
+import { SapB1Client } from "../client/SapB1Client";
+import { BusinessPartner, BusinessPartnerCreateDto, BusinessPartnerUpdateDto } from "../types/entities";
+import { BusinessPartnerSchema } from "../types/schemas";
+import { Resource } from "./Resource";
+
+export class BusinessPartnersResource extends Resource<
+  BusinessPartner,
+  BusinessPartnerCreateDto,
+  BusinessPartnerUpdateDto,
+  string
+> {
+  public constructor(client: SapB1Client) {
+    super(client, "BusinessPartners", BusinessPartnerSchema);
+  }
+}

src/resources/Documents.ts

@@ -0,0 +1,38 @@
+import { SapB1Client } from "../client/SapB1Client";
+import { MarketingDocument, MarketingDocumentCreateDto, MarketingDocumentUpdateDto } from "../types/entities";
+import { MarketingDocumentSchema } from "../types/schemas";
+import { Resource } from "./Resource";
+
+export class OrdersResource extends Resource<MarketingDocument, MarketingDocumentCreateDto, MarketingDocumentUpdateDto, number> {
+  public constructor(client: SapB1Client) {
+    super(client, "Orders", MarketingDocumentSchema, false);
+  }
+}
+
+export class InvoicesResource extends Resource<MarketingDocument, MarketingDocumentCreateDto, MarketingDocumentUpdateDto, number> {
+  public constructor(client: SapB1Client) {
+    super(client, "Invoices", MarketingDocumentSchema, false);
+  }
+}
+
+export class PurchaseOrdersResource extends Resource<
+  MarketingDocument,
+  MarketingDocumentCreateDto,
+  MarketingDocumentUpdateDto,
+  number
+> {
+  public constructor(client: SapB1Client) {
+    super(client, "PurchaseOrders", MarketingDocumentSchema, false);
+  }
+}
+
+export class DeliveryNotesResource extends Resource<
+  MarketingDocument,
+  MarketingDocumentCreateDto,
+  MarketingDocumentUpdateDto,
+  number
+> {
+  public constructor(client: SapB1Client) {
+    super(client, "DeliveryNotes", MarketingDocumentSchema, false);
+  }
+}

src/resources/Items.ts

@@ -0,0 +1,10 @@
+import { SapB1Client } from "../client/SapB1Client";
+import { Item, ItemCreateDto, ItemUpdateDto } from "../types/entities";
+import { ItemSchema } from "../types/schemas";
+import { Resource } from "./Resource";
+
+export class ItemsResource extends Resource<Item, ItemCreateDto, ItemUpdateDto, string> {
+  public constructor(client: SapB1Client) {
+    super(client, "Items", ItemSchema);
+  }
+}

src/resources/Resource.ts

@@ -0,0 +1,44 @@
+import { z } from "zod";
+import { SapB1Client } from "../client/SapB1Client";
+import { ODataQuery, ODataResponse } from "../types/odata";
+
+export class Resource<TEntity, TCreate, TUpdate, TKey extends string | number = string | number> {
+  public constructor(
+    protected readonly client: SapB1Client,
+    protected readonly path: string,
+    protected readonly schema: z.ZodType<TEntity>,
+    private readonly supportsDelete = true
+  ) {}
+
+  public list(query: ODataQuery = {}): Promise<ODataResponse<TEntity>> {
+    return this.client.get<ODataResponse<TEntity>>(this.path, query);
+  }
+
+  public listAll(query: ODataQuery = {}): Promise<TEntity[]> {
+    return this.client.getAll<TEntity>(this.path, query, this.schema);
+  }
+
+  public get(id: TKey): Promise<TEntity> {
+    return this.client.get<TEntity>(`${this.path}(${this.formatKey(id)})`, undefined, this.schema);
+  }
+
+  public create(data: TCreate): Promise<TEntity> {
+    return this.client.post<TEntity>(this.path, data, this.schema);
+  }
+
+  public update(id: TKey, data: TUpdate): Promise<void> {
+    return this.client.patch<void>(`${this.path}(${this.formatKey(id)})`, data);
+  }
+
+  public delete(id: TKey): Promise<void> {
+    if (!this.supportsDelete) {
+      throw new Error(`${this.path} does not support delete through this connector`);
+    }
+
+    return this.client.delete<void>(`${this.path}(${this.formatKey(id)})`);
+  }
+
+  protected formatKey(id: TKey): string {
+    return typeof id === "number" ? String(id) : `'${String(id).replace(/'/g, "''")}'`;
+  }
+}

src/resources/StockTransfers.ts

@@ -0,0 +1,10 @@
+import { SapB1Client } from "../client/SapB1Client";
+import { StockTransfer, StockTransferCreateDto, StockTransferUpdateDto } from "../types/entities";
+import { StockTransferSchema } from "../types/schemas";
+import { Resource } from "./Resource";
+
+export class StockTransfersResource extends Resource<StockTransfer, StockTransferCreateDto, StockTransferUpdateDto, number> {
+  public constructor(client: SapB1Client) {
+    super(client, "StockTransfers", StockTransferSchema, false);
+  }
+}

src/types/entities.ts

@@ -0,0 +1,73 @@
+export interface BusinessPartner {
+  CardCode: string;
+  CardName?: string;
+  CardType?: "cCustomer" | "cSupplier" | "cLid";
+  Phone1?: string;
+  EmailAddress?: string;
+  Currency?: string;
+  [key: string]: unknown;
+}
+
+export type BusinessPartnerCreateDto = Pick<BusinessPartner, "CardCode"> & Partial<BusinessPartner>;
+export type BusinessPartnerUpdateDto = Partial<Omit<BusinessPartner, "CardCode">>;
+
+export interface Item {
+  ItemCode: string;
+  ItemName?: string;
+  ItemsGroupCode?: number;
+  InventoryItem?: "tYES" | "tNO";
+  SalesItem?: "tYES" | "tNO";
+  PurchaseItem?: "tYES" | "tNO";
+  [key: string]: unknown;
+}
+
+export type ItemCreateDto = Pick<Item, "ItemCode"> & Partial<Item>;
+export type ItemUpdateDto = Partial<Omit<Item, "ItemCode">>;
+
+export interface DocumentLine {
+  ItemCode?: string;
+  Quantity?: number;
+  UnitPrice?: number;
+  WarehouseCode?: string;
+  [key: string]: unknown;
+}
+
+export interface MarketingDocument {
+  DocEntry: number;
+  DocNum?: number;
+  CardCode?: string;
+  DocDate?: string;
+  DocDueDate?: string;
+  TaxDate?: string;
+  DocumentLines?: DocumentLine[];
+  [key: string]: unknown;
+}
+
+export type MarketingDocumentCreateDto = Omit<Partial<MarketingDocument>, "DocEntry" | "DocNum"> & {
+  CardCode: string;
+  DocumentLines?: DocumentLine[];
+};
+export type MarketingDocumentUpdateDto = Partial<Omit<MarketingDocument, "DocEntry" | "DocNum">>;
+
+export interface StockTransferLine {
+  ItemCode?: string;
+  Quantity?: number;
+  WarehouseCode?: string;
+  FromWarehouseCode?: string;
+  [key: string]: unknown;
+}
+
+export interface StockTransfer {
+  DocEntry: number;
+  DocNum?: number;
+  DocDate?: string;
+  FromWarehouse?: string;
+  ToWarehouse?: string;
+  StockTransferLines?: StockTransferLine[];
+  [key: string]: unknown;
+}
+
+export type StockTransferCreateDto = Omit<Partial<StockTransfer>, "DocEntry" | "DocNum"> & {
+  StockTransferLines?: StockTransferLine[];
+};
+export type StockTransferUpdateDto = Partial<Omit<StockTransfer, "DocEntry" | "DocNum">>;

src/types/odata.ts

@@ -0,0 +1,34 @@
+import { z } from "zod";
+
+export interface ODataQuery {
+  select?: string[];
+  filter?: string;
+  top?: number;
+  skip?: number;
+  orderby?: string | string[];
+}
+
+export interface ODataResponse<T> {
+  value: T[];
+  "odata.metadata"?: string;
+  "odata.nextLink"?: string;
+  "@odata.context"?: string;
+  "@odata.nextLink"?: string;
+}
+
+export const ODataQuerySchema = z.object({
+  select: z.array(z.string().min(1)).optional(),
+  filter: z.string().min(1).optional(),
+  top: z.number().int().positive().optional(),
+  skip: z.number().int().min(0).optional(),
+  orderby: z.union([z.string().min(1), z.array(z.string().min(1))]).optional()
+});
+
+export const ODataResponseSchema = <T extends z.ZodTypeAny>(itemSchema: T) =>
+  z.object({
+    value: z.array(itemSchema),
+    "odata.metadata": z.string().optional(),
+    "odata.nextLink": z.string().optional(),
+    "@odata.context": z.string().optional(),
+    "@odata.nextLink": z.string().optional()
+  });

src/types/schemas.ts

@@ -0,0 +1,19 @@
+import { z } from "zod";
+
+export const UnknownRecordSchema = z.object({}).catchall(z.unknown());
+
+export const BusinessPartnerSchema = UnknownRecordSchema.extend({
+  CardCode: z.string()
+});
+
+export const ItemSchema = UnknownRecordSchema.extend({
+  ItemCode: z.string()
+});
+
+export const MarketingDocumentSchema = UnknownRecordSchema.extend({
+  DocEntry: z.number()
+});
+
+export const StockTransferSchema = UnknownRecordSchema.extend({
+  DocEntry: z.number()
+});

src/utils/logger.ts

@@ -0,0 +1,27 @@
+export interface SapB1Logger {
+  debug(message: string, meta?: Record<string, unknown>): void;
+  info(message: string, meta?: Record<string, unknown>): void;
+  warn(message: string, meta?: Record<string, unknown>): void;
+  error(message: string, meta?: Record<string, unknown>): void;
+}
+
+export const noopLogger: SapB1Logger = {
+  debug: () => undefined,
+  info: () => undefined,
+  warn: () => undefined,
+  error: () => undefined
+};
+
+export function sanitizeLogMeta(meta: Record<string, unknown>): Record<string, unknown> {
+  const forbidden = new Set(["password", "b1session", "routeid", "cookie", "authorization"]);
+
+  return Object.fromEntries(
+    Object.entries(meta).map(([key, value]) => {
+      if (forbidden.has(key.toLowerCase())) {
+        return [key, "[redacted]"];
+      }
+
+      return [key, value];
+    })
+  );
+}

src/utils/sleep.ts

@@ -0,0 +1,3 @@
+export function sleep(ms: number): Promise<void> {
+  return new Promise((resolve) => setTimeout(resolve, ms));
+}