first commit

backend/src/services/contract-duration.service.ts

@@ -0,0 +1,63 @@
+import { PrismaClient } from '@prisma/client';
+
+const prisma = new PrismaClient();
+
+export async function getAllContractDurations(includeInactive = false) {
+  const where = includeInactive ? {} : { isActive: true };
+  return prisma.contractDuration.findMany({
+    where,
+    orderBy: { code: 'asc' },
+  });
+}
+
+export async function getContractDurationById(id: number) {
+  return prisma.contractDuration.findUnique({
+    where: { id },
+    include: {
+      _count: {
+        select: { contracts: true },
+      },
+    },
+  });
+}
+
+export async function createContractDuration(data: {
+  code: string;
+  description: string;
+}) {
+  return prisma.contractDuration.create({
+    data: {
+      ...data,
+      isActive: true,
+    },
+  });
+}
+
+export async function updateContractDuration(
+  id: number,
+  data: {
+    code?: string;
+    description?: string;
+    isActive?: boolean;
+  }
+) {
+  return prisma.contractDuration.update({
+    where: { id },
+    data,
+  });
+}
+
+export async function deleteContractDuration(id: number) {
+  // Check if contract duration is used by any contracts
+  const count = await prisma.contract.count({
+    where: { contractDurationId: id },
+  });
+
+  if (count > 0) {
+    throw new Error(
+      `Laufzeit kann nicht gelöscht werden, da sie von ${count} Verträgen verwendet wird`
+    );
+  }
+
+  return prisma.contractDuration.delete({ where: { id } });
+}