feat(mcp): manage master data and cost centre hierarchies

backend/src/routes/resources/main.ts

@@ -1,3 +1,4 @@
+import { validateCostCentreParent } from "../../modules/cost-centre-hierarchy.service"
 import { FastifyInstance } from "fastify"
 import {
     eq,
@@ -13,7 +14,6 @@ import {
 
 import {
     authProfiles,
-    costcentres,
     createddocuments,
     customers,
     entitybankaccounts,
@@ -324,58 +324,6 @@ function validateMemberPayload(payload: Record<string, any>) {
     return null
 }
 
-async function validateCostCentreParent(
-    server: FastifyInstance,
-    tenantId: number,
-    costCentreId: string | null,
-    parentCostcentreId: string | null
-) {
-    if (!parentCostcentreId) {
-        return null
-    }
-
-    const hierarchyRows = await server.db
-        .select({
-            id: costcentres.id,
-            parentCostcentre: costcentres.parentCostcentre,
-        })
-        .from(costcentres)
-        .where(eq(costcentres.tenant, tenantId))
-
-    const hierarchyMap = new Map(
-        hierarchyRows.map((row) => [row.id, row.parentCostcentre || null])
-    )
-
-    if (!hierarchyMap.has(parentCostcentreId)) {
-        return "Die übergeordnete Kostenstelle wurde nicht gefunden."
-    }
-
-    if (costCentreId && parentCostcentreId === costCentreId) {
-        return "Eine Kostenstelle kann nicht sich selbst als übergeordnete Kostenstelle haben."
-    }
-
-    if (!costCentreId) {
-        return null
-    }
-
-    let currentParentId: string | null = parentCostcentreId
-    const visited = new Set<string>()
-
-    while (currentParentId) {
-        if (currentParentId === costCentreId) {
-            return "Die ausgewählte übergeordnete Kostenstelle würde einen Zyklus erzeugen."
-        }
-
-        if (visited.has(currentParentId)) {
-            break
-        }
-
-        visited.add(currentParentId)
-        currentParentId = hierarchyMap.get(currentParentId) || null
-    }
-
-    return null
-}
 
 function maskIban(iban: string) {
     if (!iban) return ""