KI-AGENT: ZUGFeRD- und E-Rechnungserkennung ergänzen

backend/src/modules/cron/prepareIncomingInvoices.ts

@@ -1,6 +1,8 @@
 import { FastifyInstance } from "fastify"
 import dayjs from "dayjs"
 import { getInvoiceDataFromGPT } from "../../utils/gpt"
+import { loadFileBuffer } from "../../utils/fileBuffer"
+import { detectElectronicInvoice } from "../einvoice/detectElectronicInvoice"
 
 // Drizzle schema
 import {
@@ -90,7 +92,32 @@ export function prepareIncomingInvoices(server: FastifyInstance) {
             for (const file of filesRes) {
                 console.log(`Processing file ${file.id} for tenant ${tenantId}`)
 
-                const data = await getInvoiceDataFromGPT(server,file, tenantId)
+                let fileData: Buffer
+
+                try {
+                    fileData = await loadFileBuffer(file.path!)
+                } catch (error) {
+                    server.log.error(error, `Datei ${file.id} konnte nicht aus S3 geladen werden.`)
+                    continue
+                }
+
+                const electronicInvoice = await detectElectronicInvoice(fileData, file)
+
+                if (electronicInvoice) {
+                    server.log.info({
+                        fileId: file.id,
+                        container: electronicInvoice.container,
+                        syntax: electronicInvoice.syntax,
+                        attachmentName: electronicInvoice.attachmentName,
+                    }, "Strukturierte E-Rechnung erkannt.")
+
+                    if (electronicInvoice.container === "xml") {
+                        server.log.warn({ fileId: file.id }, "Die Auswertung eigenständiger E-Rechnungs-XML folgt in Etappe 2.")
+                        continue
+                    }
+                }
+
+                const data = await getInvoiceDataFromGPT(server, file, tenantId, fileData)
 
                 if (!data) {
                     server.log.warn(`GPT returned no data for file ${file.id}`)