xinvoice/ts/formats/ubl/xrechnung/xrechnung.encoder.ts

import { UBLBaseEncoder } from '../ubl.encoder.js';
import type { TInvoice, TCreditNote, TDebitNote } from '../../../interfaces/common.js';
import { UBLDocumentType } from '../ubl.types.js';

/**
 * Encoder for XRechnung (UBL) format
 * Implements encoding of TInvoice to XRechnung XML
 */
export class XRechnungEncoder extends UBLBaseEncoder {
  /**
   * Encodes a TCreditNote object to XRechnung XML
   * @param creditNote TCreditNote object to encode
   * @returns Promise resolving to XML string
   */
  protected async encodeCreditNote(creditNote: TCreditNote): Promise<string> {
    // For now, we'll just return a simple UBL credit note template
    // In a real implementation, we would generate a proper UBL credit note
    return `<?xml version="1.0" encoding="UTF-8"?>
<CreditNote xmlns="urn:oasis:names:specification:ubl:schema:xsd:CreditNote-2"
         xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"
         xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2">
  <cbc:CustomizationID>urn:cen.eu:en16931:2017#compliant#urn:xoev-de:kosit:standard:xrechnung_2.0</cbc:CustomizationID>
  <cbc:ID>${creditNote.id}</cbc:ID>
  <cbc:IssueDate>${this.formatDate(creditNote.date)}</cbc:IssueDate>
  <cbc:CreditNoteTypeCode>381</cbc:CreditNoteTypeCode>
  <cbc:DocumentCurrencyCode>${creditNote.currency}</cbc:DocumentCurrencyCode>

  <!-- Rest of the credit note XML would go here -->
</CreditNote>`;
  }

  /**
   * Encodes a TDebitNote object to XRechnung XML
   * @param debitNote TDebitNote object to encode
   * @returns Promise resolving to XML string
   */
  protected async encodeDebitNote(debitNote: TDebitNote): Promise<string> {
    // For now, we'll just return a simple UBL invoice template
    // In a real implementation, we would generate a proper UBL invoice
    return `<?xml version="1.0" encoding="UTF-8"?>
<Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2"
         xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"
         xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2">
  <cbc:CustomizationID>urn:cen.eu:en16931:2017#compliant#urn:xoev-de:kosit:standard:xrechnung_2.0</cbc:CustomizationID>
  <cbc:ID>${debitNote.id}</cbc:ID>
  <cbc:IssueDate>${this.formatDate(debitNote.date)}</cbc:IssueDate>
  <cbc:DueDate>${this.formatDate(debitNote.date + debitNote.dueInDays * 24 * 60 * 60 * 1000)}</cbc:DueDate>
  <cbc:InvoiceTypeCode>380</cbc:InvoiceTypeCode>
  <cbc:DocumentCurrencyCode>${debitNote.currency}</cbc:DocumentCurrencyCode>

  <cac:AccountingSupplierParty>
    <cac:Party>
      <cac:PartyName>
        <cbc:Name>${debitNote.from.name}</cbc:Name>
      </cac:PartyName>
      <cac:PostalAddress>
        <cbc:StreetName>${debitNote.from.address.streetName || ''}</cbc:StreetName>
        <cbc:BuildingNumber>${debitNote.from.address.houseNumber || ''}</cbc:BuildingNumber>
        <cbc:CityName>${debitNote.from.address.city || ''}</cbc:CityName>
        <cbc:PostalZone>${debitNote.from.address.postalCode || ''}</cbc:PostalZone>
        <cac:Country>
          <cbc:IdentificationCode>${debitNote.from.address.countryCode || ''}</cbc:IdentificationCode>
        </cac:Country>
      </cac:PostalAddress>
      ${debitNote.from.registrationDetails?.vatId ? `
      <cac:PartyTaxScheme>
        <cbc:CompanyID>${debitNote.from.registrationDetails.vatId}</cbc:CompanyID>
        <cac:TaxScheme>
          <cbc:ID>VAT</cbc:ID>
        </cac:TaxScheme>
      </cac:PartyTaxScheme>` : ''}
      ${debitNote.from.registrationDetails?.registrationId ? `
      <cac:PartyLegalEntity>
        <cbc:RegistrationName>${debitNote.from.registrationDetails.registrationName || debitNote.from.name}</cbc:RegistrationName>
        <cbc:CompanyID>${debitNote.from.registrationDetails.registrationId}</cbc:CompanyID>
      </cac:PartyLegalEntity>` : ''}
    </cac:Party>
  </cac:AccountingSupplierParty>

  <cac:AccountingCustomerParty>
    <cac:Party>
      <cac:PartyName>
        <cbc:Name>${debitNote.to.name}</cbc:Name>
      </cac:PartyName>
      <cac:PostalAddress>
        <cbc:StreetName>${debitNote.to.address.streetName || ''}</cbc:StreetName>
        <cbc:BuildingNumber>${debitNote.to.address.houseNumber || ''}</cbc:BuildingNumber>
        <cbc:CityName>${debitNote.to.address.city || ''}</cbc:CityName>
        <cbc:PostalZone>${debitNote.to.address.postalCode || ''}</cbc:PostalZone>
        <cac:Country>
          <cbc:IdentificationCode>${debitNote.to.address.countryCode || ''}</cbc:IdentificationCode>
        </cac:Country>
      </cac:PostalAddress>
      ${debitNote.to.registrationDetails?.vatId ? `
      <cac:PartyTaxScheme>
        <cbc:CompanyID>${debitNote.to.registrationDetails.vatId}</cbc:CompanyID>
        <cac:TaxScheme>
          <cbc:ID>VAT</cbc:ID>
        </cac:TaxScheme>
      </cac:PartyTaxScheme>` : ''}
    </cac:Party>
  </cac:AccountingCustomerParty>

  <cac:PaymentTerms>
    <cbc:Note>Due in ${debitNote.dueInDays} days</cbc:Note>
  </cac:PaymentTerms>

  <cac:TaxTotal>
    <cbc:TaxAmount currencyID="${debitNote.currency}">0.00</cbc:TaxAmount>
  </cac:TaxTotal>

  <cac:LegalMonetaryTotal>
    <cbc:LineExtensionAmount currencyID="${debitNote.currency}">0.00</cbc:LineExtensionAmount>
    <cbc:TaxExclusiveAmount currencyID="${debitNote.currency}">0.00</cbc:TaxExclusiveAmount>
    <cbc:TaxInclusiveAmount currencyID="${debitNote.currency}">0.00</cbc:TaxInclusiveAmount>
    <cbc:PayableAmount currencyID="${debitNote.currency}">0.00</cbc:PayableAmount>
  </cac:LegalMonetaryTotal>

  ${debitNote.items.map((item, index) => `
  <cac:InvoiceLine>
    <cbc:ID>${index + 1}</cbc:ID>
    <cbc:InvoicedQuantity unitCode="${item.unitType}">${item.unitQuantity}</cbc:InvoicedQuantity>
    <cbc:LineExtensionAmount currencyID="${debitNote.currency}">${item.unitNetPrice * item.unitQuantity}</cbc:LineExtensionAmount>
    <cac:Item>
      <cbc:Name>${item.name}</cbc:Name>
      ${item.articleNumber ? `
      <cac:SellersItemIdentification>
        <cbc:ID>${item.articleNumber}</cbc:ID>
      </cac:SellersItemIdentification>` : ''}
      <cac:ClassifiedTaxCategory>
        <cbc:ID>S</cbc:ID>
        <cbc:Percent>${item.vatPercentage}</cbc:Percent>
        <cac:TaxScheme>
          <cbc:ID>VAT</cbc:ID>
        </cac:TaxScheme>
      </cac:ClassifiedTaxCategory>
    </cac:Item>
    <cac:Price>
      <cbc:PriceAmount currencyID="${debitNote.currency}">${item.unitNetPrice}</cbc:PriceAmount>
    </cac:Price>
  </cac:InvoiceLine>`).join('')}
</Invoice>`;
  }
}