feat(accounting): edit finalized document cost centres

backend/src/mcp/tools/accounting.ts

@@ -18,6 +18,7 @@ import { useNextNumberRangeNumber } from "../../utils/functions"
 import { saveFile } from "../../utils/files"
 import { insertHistoryItem } from "../../utils/history"
 import { executeManualGeneration, finishManualGeneration } from "../../modules/serialexecution.service"
+import { updateOutgoingDocumentCostCentres } from "../../modules/outgoing-document-cost-centres.service"
 import {
     prepareStatementAllocationInput,
     statementAllocationUuidArg,
@@ -633,6 +634,72 @@ export const accountingTools: McpTool[] = [
             return { document: updated }
         },
     },
+    {
+        name: "accounting.outgoing_documents.cost_centres.update",
+        title: "Kostenstellen eines Ausgangsbelegs ändern",
+        description: "Ändert ausschließlich die Beleg- und Positionskostenstellen eines bereits fertiggestellten Ausgangsbelegs.",
+        requiredPermissions: ["accounting.outgoing_documents.write"],
+        inputSchema: {
+            type: "object",
+            required: ["id"],
+            anyOf: [
+                { required: ["costcentre"] },
+                { required: ["rowCostCentres"] },
+            ],
+            properties: {
+                id: { type: "number" },
+                costcentre: { type: ["string", "null"], description: "UUID der Beleg-Kostenstelle oder null." },
+                rowCostCentres: {
+                    type: "array",
+                    items: {
+                        type: "object",
+                        required: ["rowId", "costcentre"],
+                        properties: {
+                            rowId: { type: "string", description: "ID der Belegposition." },
+                            costcentre: { type: ["string", "null"], description: "UUID der Positionskostenstelle oder null." },
+                        },
+                    },
+                },
+            },
+        },
+        async handler(context, args) {
+            const id = numberArg(args, "id")
+            if (!id) throw new Error("id ist erforderlich")
+
+            const input: {
+                costcentre?: string | null
+                rowCostCentres?: Array<{ rowId: string, costcentre: string | null }>
+            } = {}
+            if (Object.prototype.hasOwnProperty.call(args, "costcentre")) {
+                const costcentre = args.costcentre
+                if (costcentre !== null && (typeof costcentre !== "string" || !UUID_PATTERN.test(costcentre))) {
+                    throw new Error("costcentre muss eine gültige UUID oder null sein")
+                }
+                input.costcentre = costcentre as string | null
+            }
+            if (args.rowCostCentres !== undefined) {
+                if (!Array.isArray(args.rowCostCentres)) throw new Error("rowCostCentres muss ein Array sein")
+                input.rowCostCentres = args.rowCostCentres.map((assignment: any) => {
+                    const rowId = typeof assignment?.rowId === "string" ? assignment.rowId.trim() : ""
+                    const costcentre = assignment?.costcentre
+                    if (!rowId) throw new Error("Jede Positionszuordnung benötigt eine rowId")
+                    if (costcentre !== null && (typeof costcentre !== "string" || !UUID_PATTERN.test(costcentre))) {
+                        throw new Error(`Ungültige Kostenstelle für Position ${rowId}`)
+                    }
+                    return { rowId, costcentre }
+                })
+            }
+
+            const document = await updateOutgoingDocumentCostCentres(
+                context.server,
+                context.tenantId,
+                context.userId,
+                id,
+                input,
+            )
+            return { document }
+        },
+    },
     {
         name: "accounting.outgoing_documents.finalize",
         title: "Ausgangsbeleg finalisieren",

backend/src/modules/outgoing-document-cost-centres.service.ts

@@ -0,0 +1,146 @@
+import { and, eq, inArray } from "drizzle-orm"
+import { FastifyInstance } from "fastify"
+import { costcentres, createddocuments } from "../../db/schema"
+import { insertHistoryItem } from "../utils/history"
+
+export type RowCostCentreAssignment = {
+    rowId: string
+    costcentre: string | null
+}
+
+export type OutgoingDocumentCostCentreUpdate = {
+    costcentre?: string | null
+    rowCostCentres?: RowCostCentreAssignment[]
+}
+
+const serviceError = (message: string, statusCode = 400) =>
+    Object.assign(new Error(message), { statusCode })
+const UUID_PATTERN = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i
+
+export function applyRowCostCentreAssignments(
+    rows: unknown,
+    assignments: RowCostCentreAssignment[] = [],
+) {
+    if (!Array.isArray(rows)) return []
+    if (!assignments.length) return rows
+
+    const assignmentMap = new Map(assignments.map((assignment) => [String(assignment.rowId), assignment.costcentre]))
+    const existingIds = new Set(rows
+        .filter((row) => row && typeof row === "object" && !Array.isArray(row))
+        .map((row) => (row as Record<string, unknown>).id)
+        .filter((id) => id !== null && id !== undefined && id !== "")
+        .map(String))
+
+    for (const rowId of assignmentMap.keys()) {
+        if (!existingIds.has(rowId)) throw serviceError(`Position ${rowId} wurde im Ausgangsbeleg nicht gefunden`)
+    }
+
+    return rows.map((row) => {
+        if (!row || typeof row !== "object" || Array.isArray(row)) return row
+        const rowRecord = row as Record<string, unknown>
+        if (rowRecord.id === null || rowRecord.id === undefined || rowRecord.id === "") return row
+        const rowId = String(rowRecord.id)
+        if (!assignmentMap.has(rowId)) return row
+
+        const { costcentre: _legacyCostCentre, ...rest } = rowRecord
+        return { ...rest, costCentre: assignmentMap.get(rowId) ?? null }
+    })
+}
+
+export async function updateOutgoingDocumentCostCentres(
+    server: FastifyInstance,
+    tenantId: number,
+    userId: string,
+    documentId: number,
+    input: OutgoingDocumentCostCentreUpdate,
+) {
+    const hasDocumentCostCentre = Object.prototype.hasOwnProperty.call(input, "costcentre")
+    if (hasDocumentCostCentre && input.costcentre !== null && !UUID_PATTERN.test(String(input.costcentre))) {
+        throw serviceError("costcentre muss eine gültige UUID oder null sein")
+    }
+    if (input.rowCostCentres !== undefined && !Array.isArray(input.rowCostCentres)) {
+        throw serviceError("rowCostCentres muss ein Array sein")
+    }
+
+    const rowAssignments = (input.rowCostCentres || []).map((assignment) => {
+        const rowId = typeof assignment?.rowId === "string" ? assignment.rowId.trim() : ""
+        const costcentre = assignment?.costcentre
+        if (!rowId) throw serviceError("Jede Positionszuordnung benötigt eine rowId")
+        if (costcentre !== null && !UUID_PATTERN.test(String(costcentre))) {
+            throw serviceError(`Ungültige Kostenstelle für Position ${rowId}`)
+        }
+        return { rowId, costcentre }
+    })
+    if (!hasDocumentCostCentre && !rowAssignments.length) {
+        throw serviceError("Mindestens eine Beleg- oder Positionskostenstelle ist erforderlich")
+    }
+
+    const [existing] = await server.db
+        .select()
+        .from(createddocuments)
+        .where(and(
+            eq(createddocuments.id, documentId),
+            eq(createddocuments.tenant, tenantId),
+            eq(createddocuments.archived, false),
+        ))
+        .limit(1)
+
+    if (!existing) throw serviceError("Ausgangsbeleg nicht gefunden", 404)
+    if (existing.state !== "Gebucht") {
+        throw serviceError("Kostenstellen können über diesen Weg nur bei fertiggestellten Ausgangsbelegen geändert werden")
+    }
+
+    const referencedCostCentreIds = [...new Set([
+        ...(hasDocumentCostCentre && input.costcentre ? [input.costcentre] : []),
+        ...rowAssignments.map((assignment) => assignment.costcentre).filter((id): id is string => Boolean(id)),
+    ])]
+
+    if (referencedCostCentreIds.length) {
+        const validCostCentres = await server.db
+            .select({ id: costcentres.id })
+            .from(costcentres)
+            .where(and(
+                eq(costcentres.tenant, tenantId),
+                eq(costcentres.archived, false),
+                inArray(costcentres.id, referencedCostCentreIds),
+            ))
+
+        if (validCostCentres.length !== referencedCostCentreIds.length) {
+            throw serviceError("Mindestens eine Kostenstelle wurde nicht gefunden oder ist archiviert")
+        }
+    }
+
+    const updatedRows = applyRowCostCentreAssignments(existing.rows, rowAssignments)
+    const update: Record<string, unknown> = {
+        rows: updatedRows,
+        updatedAt: new Date(),
+        updatedBy: userId,
+    }
+    if (hasDocumentCostCentre) update.costcentre = input.costcentre ?? null
+
+    const [updated] = await server.db
+        .update(createddocuments)
+        .set(update)
+        .where(and(
+            eq(createddocuments.id, documentId),
+            eq(createddocuments.tenant, tenantId),
+            eq(createddocuments.archived, false),
+            eq(createddocuments.state, "Gebucht"),
+        ))
+        .returning()
+
+    if (!updated) throw serviceError("Ausgangsbeleg nicht gefunden", 404)
+
+    await insertHistoryItem(server, {
+        tenant_id: tenantId,
+        created_by: userId,
+        entity: "createddocuments",
+        entityId: documentId,
+        action: "updated",
+        oldVal: existing,
+        newVal: updated,
+        text: "Kostenstellen des fertiggestellten Ausgangsbelegs geändert",
+    })
+
+    return updated
+}

backend/src/routes/functions.ts

@@ -21,6 +21,7 @@ import {generateTimesEvaluation} from "../modules/time/evaluation.service";
 import {citys, files} from "../../db/schema";
 import {and, eq, isNull, not} from "drizzle-orm";
 import {executeManualGeneration, finishManualGeneration} from "../modules/serialexecution.service";
+import { updateOutgoingDocumentCostCentres } from "../modules/outgoing-document-cost-centres.service";
 import { s3 } from "../utils/s3";
 import { secrets } from "../utils/secrets";
 import { storeExtractedTextForFile } from "../utils/documentText";
@@ -306,6 +307,26 @@ export default async function functionRoutes(server: FastifyInstance) {
        return finishManualGeneration(server, execution_id, req.user.tenant_id)
     })
 
+    server.put('/functions/outgoing-documents/:id/cost-centres', async (req, reply) => {
+        try {
+            const { id } = req.params as { id: string }
+            const documentId = Number(id)
+            if (!Number.isFinite(documentId)) return reply.code(400).send({ error: "Ungültige Ausgangsbeleg-ID" })
+
+            const document = await updateOutgoingDocumentCostCentres(
+                server,
+                req.user.tenant_id,
+                req.user.user_id,
+                documentId,
+                req.body as any,
+            )
+            return { document }
+        } catch (error) {
+            const statusCode = (error as any)?.statusCode || 500
+            return reply.code(statusCode).send({ error: error instanceof Error ? error.message : "Kostenstellen konnten nicht geändert werden" })
+        }
+    })
+
     server.post('/functions/services/bankstatementsync', async (req, reply) => {
         const result = await server.services.bankStatements.run(req.user.tenant_id);
         if (result.errors.length > 0) {

backend/tests/outgoingDocumentCostCentres.test.ts

@@ -0,0 +1,33 @@
+import assert from "node:assert/strict"
+import test from "node:test"
+import { applyRowCostCentreAssignments } from "../src/modules/outgoing-document-cost-centres.service"
+import { mcpToolMap } from "../src/mcp/registry"
+
+test("changes only requested position cost centres", () => {
+    const rows = [
+        { id: "row-1", description: "Montage", price: 100, costCentre: "old-1" },
+        { id: "row-2", description: "Material", price: 50, costCentre: "old-2" },
+    ]
+
+    assert.deepEqual(applyRowCostCentreAssignments(rows, [
+        { rowId: "row-1", costcentre: "new-1" },
+    ]), [
+        { id: "row-1", description: "Montage", price: 100, costCentre: "new-1" },
+        rows[1],
+    ])
+})
+
+test("rejects assignments for unknown document positions", () => {
+    assert.throws(
+        () => applyRowCostCentreAssignments([{ id: "row-1" }], [{ rowId: "missing", costcentre: null }]),
+        /Position missing.*nicht gefunden/,
+    )
+})
+
+test("registers a dedicated finalized-document cost centre tool", () => {
+    const tool = mcpToolMap.get("accounting.outgoing_documents.cost_centres.update")
+
+    assert.deepEqual(tool?.requiredPermissions, ["accounting.outgoing_documents.write"])
+    assert.deepEqual(tool?.inputSchema.required, ["id"])
+    assert.ok(tool?.inputSchema.anyOf)
+})

frontend/pages/createDocument/edit/[[id]].vue

@@ -1896,6 +1896,31 @@ const saveDocument = async (state, resetup = false) => {
   if (resetup) await setupPage()
 }
 
+const saveFinalizedCostCentres = async () => {
+  const rowCostCentres = itemInfo.value.rows
+      .filter(row => row?.id)
+      .map(row => ({
+        rowId: String(row.id),
+        costcentre: row.costCentre || null,
+      }))
+
+  const result = await $api(`/api/functions/outgoing-documents/${itemInfo.value.id}/cost-centres`, {
+    method: "PUT",
+    body: {
+      costcentre: itemInfo.value.costcentre || null,
+      rowCostCentres,
+    },
+  })
+
+  itemInfo.value.costcentre = result.document.costcentre
+  itemInfo.value.rows = normalizeCreatedDocumentRows(result.document.rows)
+  toast.add({
+    title: "Kostenstellen gespeichert",
+    description: "Die Kostenstellen des fertiggestellten Belegs wurden aktualisiert.",
+    color: "success",
+  })
+}
+
 const selectedTab = ref("0")
 
 const closeDocument = async () => {
@@ -2077,7 +2102,7 @@ const setRowData = async (row, service = {sellingPriceComposed: {}}, product = {
       <UButton
           icon="i-mdi-content-save"
           @click="saveDocument('Entwurf',true)"
-          v-if="itemInfo.type !== 'serialInvoices' && !isTemplateMode"
+          v-if="itemInfo.type !== 'serialInvoices' && !isTemplateMode && itemInfo.state === 'Entwurf'"
           :disabled="!itemInfo.customer"
       >
         Speichern
@@ -2092,10 +2117,17 @@ const setRowData = async (row, service = {sellingPriceComposed: {}}, product = {
       </UButton>
       <UButton
           @click="closeDocument"
-          v-if="itemInfo.id && itemInfo.type !== 'serialInvoices' && !isTemplateMode"
+          v-if="itemInfo.id && itemInfo.type !== 'serialInvoices' && !isTemplateMode && itemInfo.state === 'Entwurf'"
       >
         {{selectedTab === '0' ? "Vorschau zeigen" : "Fertigstellen"}}
       </UButton>
+      <UButton
+          icon="i-heroicons-tag"
+          @click="saveFinalizedCostCentres"
+          v-if="itemInfo.id && itemInfo.type !== 'serialInvoices' && !isTemplateMode && itemInfo.state === 'Gebucht'"
+      >
+        Kostenstellen speichern
+      </UButton>
       <UButton
           icon="i-mdi-content-save"
           @click="saveSerialInvoice"