lexoffice-client-js

Javascript client library for the lexoffice Public API.

fully typed

promise based

❌ non throwing

📦 Contents

• ⚙️ Installation
• 📚 Documentation
• 🔑 Usage
• 💡 Examples
  • Retrieve an invoice
  • Create an invoice
  • Upload file
• ❌ Error handling
• 🛠 Provided methods grouped by endpoint
  • Contact
  • Country
  • Credit note
  • Down payment invoice
  • Event subscription
  • File
  • Invoice
  • Order confirmation
  • Payment
  • Payment condition
  • Posting category
  • Profile
  • Quotation
  • Recurring Template
  • Voucher
  • Voucherlist
• 🔖 Side notes

• About us

---

⚙️ Installation

npm install @elbstack/lexoffice-client-js

or

yarn add @elbstack/lexoffice-client-js

📚 Documentation

You can find the official lexoffice API documentation here.

🔑 Usage

To get your API Key, you must already be a lexoffice user. Get it here.

import { Client } from '@elbstack/lexoffice-client-js';

const client = new Client(YOUR_LEXOFFICE_API_KEY);

💡 Examples

All functions are promise based. These promises are formatted by the ts-results package, for extended error handling see Error handling.

Retrieve an invoice

const invoiceResult = await client.retrieveInvoice('caf4e0c3-c3e8-4a06-bcfe-346bc7190b2');

if (invoiceResult.ok) {
  const invoice = invoiceResult.val;
} else {
  console.error('An error occured');
}

Create an invoice

const invoice = {
  voucherDate: '2017-02-22T00:00:00.000+01:00',
  address: {
    name: 'Bike & Ride GmbH & Co. KG',
    supplement: 'Gebäude 10',
    street: 'Musterstraße 42',
    city: 'Freiburg',
    zip: '79112',
    countryCode: 'DE',
  },
  lineItems: [
    {
      type: 'custom',
      name: 'Energieriegel Testpaket',
      quantity: 1,
      unitName: 'Stück',
      unitPrice: {
        currency: 'EUR',
        netAmount: 5,
        taxRatePercentage: 0,
      },
      discountPercentage: 0,
    },
    {
      type: 'text',
      name: 'Strukturieren Sie Ihre Belege durch Text-Elemente.',
      description: 'Das hilft beim Verständnis',
    },
  ],
  totalPrice: {
    currency: 'EUR',
  },
  taxConditions: {
    taxType: 'net',
  },
  shippingConditions: {
    shippingDate: '2017-04-22T00:00:00.000+02:00',
    shippingType: 'delivery',
  },
  title: 'Rechnung',
  introduction: 'Ihre bestellten Positionen stellen wir Ihnen hiermit in Rechnung',
  remark: 'Vielen Dank für Ihren Einkauf',
};

const createdInvoiceResult = await client.createInvoice(invoice, { finalize: true });

if (createdInvoiceResult.ok) {
  const invoice = createdInvoiceResult.val;
} else {
  console.error('An error occured');
}

Upload File

let fs = require('fs');
let FormData = require('form-data');

let data = new FormData();

data.append('file', fs.createReadStream(__dirname + '/yourFolder/yourFile'));
data.append('type', 'voucher');

const uploadedFileResult = await client.uploadFile(data);

if (uploadedFileResult.ok) {
  const invoice = uploadedFileResult.val;
} else {
  console.error('An error occured');
}

❌ Error handling

As mentioned above, the returned promises are formatted by ts-results which is a typescript implementation of Rust's Result and Option objects. It brings compile-time error checking and optional values to typescript. All errors are instances of type RequestError. If you want to use the advantages of ts-results, all client responses should be processed similar to the following:

if (YOUR_RESULT.ok) {
  const YOUR_VARIABLE = YOUR_RESULT.val;
  // Work with your result
} else {
  // Your request returned an error
  const error = YOUR_RESULT.val;
  console.log('error:', error);
  // Further error checking is possible by
  if (error instanceof RequestError) {
    console.log('Hello instance of RequestError!');

    if (error instanceof RequestNotFoundError) {
      console.log('Wow, it looks like you have many instances!');
    }
    if (error instanceof RequestMethodNotAcceptableLegacyError) {
      console.log('Seems, that you take care of your legacy!');
    }
  }
}

Error codes and types

Regular errors
❌ Error code	Error type	❌ Server error code	Error type
400	RequestBadRequestError	500	RequestInternalServerError
401	RequestUnauthorizedError	503	RequestServiceUnavailableError
402	RequestPaymentRequiredError	504	RequestGatewayTimeoutError
403	RequestForbiddenError
404	RequestNotFoundError
405	RequestMethodNotAllowedError
406	RequestMethodNotAcceptableError
409	RequestConflictError
415	RequestUnsupportedMediaTypeError
429	RequestTooManyRequestsError
Legacy errors (used by the endpoints files, profiles and contacts)
400	RequestBadRequestLegacyError	500	RequestInternalServerLegacyError
406	RequestMethodNotAcceptableLegacyError

🛠 Provided methods grouped by endpoint

Contact

createContact(contact: ContactCreatePerson | ContactCreateCompany): Promise<Result<ContactCreateResponse, RequestError>>

retrieveContact(id: string): Promise<Result<ContactRetrieveResponse, RequestError>>

updateContact(id: string, contact: ContactUpdatePerson | ContactUpdateCompany): Promise<Result<ContactUpdateResponse, RequestError>>

filterContact(filter?: OptionalFilters & Partial<PagingParameters>): Promise<Result<ContactFilterRetrieveResponse, RequestError>>

Country

retrieveListOfCountries(): Promise<Result<Country[], RequestError>>

Credit note

createCreditNote(creditNote: CreditNoteCreate, optionalFinalized?: OptionalFinalized): Promise<Result<CreditNoteCreateResponse, RequestError>>

retrieveCreditNote(id: string): Promise<Result<CreditNoteRetrieveResponse, RequestError>>

renderCreditNoteDocumentFileId(id: string): Promise<Result<DocumentFileId, RequestError>>

Down payment invoice

retrieveDownPaymentInvoice(id: string): Promise<Result<DownPaymentInvoice, RequestError>>

Event subscription

createEventSubscription(eventSubscription: EventSubscriptionCreate): Promise<Result<EventSubscription, RequestError>>

retrieveEventSubscription(id: string): Promise<Result<EventSubscription, RequestError>>

retrieveAllEventSubscriptions(): Promise<Result<EventSubscriptions, RequestError>>

deleteEventSubscription(id: string): Promise<Result<unknown, RequestError>>

File

uploadFile(data: FormData): Promise<Result<FileResponse, RequestError>>

downloadFile(documentFileId: string, optionalParameter?: RenderType): Promise<Result<unknown, RequestError>>

Invoice

createInvoice(invoice: InvoiceCreate | XRechnung, optionalFinalized?: OptionalFinalized): Promise<Result<InvoiceCreateResponse, RequestError>>

retrieveInvoice(id: string): Promise<Result<InvoiceRetrieveResponse, RequestError>>

renderInvoiceDocumentFileId(id: string): Promise<Result<DocumentFileId, RequestError>>

Order confirmation

createOrderConfirmation(orderConfirmation: OrderConfirmation): Promise<Result<OrderConfirmationResponse, RequestError>>

retrieveOrderConfirmation(id: string): Promise<Result<OrderConfirmationRetrieveResponse, RequestError>>

renderOrderConfirmationDocumentFileId(id: string): Promise<Result<DocumentFileId, RequestError>>

Payment

retrievePayment(id: string): Promise<Result<Payment, RequestError>>

Payment condition

retrievePaymentConditionList(): Promise<Result<PaymentCondition, RequestError>>

Posting category

retrieveListPostingCategories(): Promise<Result<PostingCategory[], RequestError>>

Profile

retrieveProfile(): Promise<Result<Profile, RequestError>>

Quotation

createQuotation(quotation: QuotationCreate, optionalFilter?: OptionalFinalized): Promise<Result<QuotationCreate, RequestError>>

retrieveQuotation(id: string): Promise<Result<Partial<Quotation>, RequestError>>

renderQuotationDocumentFileId(id: string): Promise<Result<DocumentFileId, RequestError>>

Recurring template

retrieveRecurringTemplate(id: string): Promise<Result<Partial<RecurringTemplate>, RequestError>>

retrieveAllRecurringTemplates(optionalFilter?: PagingParameters): Promise<Result<RecurringTemplates, RequestError>>

Voucher

createVoucher(voucher: CreateVoucher): Promise<Result<VoucherCreateResponse, RequestError>>

retrieveVoucher(id: string): Promise<Result<Partial<Voucher>, RequestError>>

updateVoucher(id: string, voucher: CreateVoucher): Promise<Result<VoucherCreateResponse, RequestError>>

filterVoucher(voucherNumber: VoucherNumber): Promise<Result<Partial<Vouchers>, RequestError>>

uploadFileToVoucher(data: FormData, id: string): Promise<Result<FileResponse, RequestError>>

Voucherlist

retrieveVoucherlist(filterParameter: FilterParameter): Promise<Result<Voucherlist, RequestError>>

🔖 Side notes

Updating

For updating any type of vouchers where the "version" property is required, you first need to retrieve it and use the current "version" value to properly update.

Rendering Document File Id

Only possible for any type of vouchers that are not in "draft" mode.

Download File

The required id is not the id itself, it is the documentFileId, which can be required with the matching method and the vouchers id:

renderCreditNoteDocumentFileId(id);
renderInvoiceDocumentFileId(id);
renderOrderConfirmationDocumentFileId(id);
renderQuotationDocumentFileId(id);

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