first commit

backend/src/services/contractCategory.service.ts

@@ -0,0 +1,78 @@
+import { PrismaClient } from '@prisma/client';
+
+const prisma = new PrismaClient();
+
+export async function getAllContractCategories(includeInactive = false) {
+  return prisma.contractCategory.findMany({
+    where: includeInactive ? {} : { isActive: true },
+    orderBy: [{ sortOrder: 'asc' }, { name: 'asc' }],
+    include: {
+      _count: {
+        select: { contracts: true },
+      },
+    },
+  });
+}
+
+export async function getContractCategoryById(id: number) {
+  return prisma.contractCategory.findUnique({
+    where: { id },
+    include: {
+      _count: {
+        select: { contracts: true },
+      },
+    },
+  });
+}
+
+export async function getContractCategoryByCode(code: string) {
+  return prisma.contractCategory.findUnique({
+    where: { code },
+  });
+}
+
+interface ContractCategoryCreateData {
+  code: string;
+  name: string;
+  icon?: string;
+  color?: string;
+  sortOrder?: number;
+  isActive?: boolean;
+}
+
+export async function createContractCategory(data: ContractCategoryCreateData) {
+  return prisma.contractCategory.create({
+    data,
+    include: {
+      _count: {
+        select: { contracts: true },
+      },
+    },
+  });
+}
+
+export async function updateContractCategory(id: number, data: Partial<ContractCategoryCreateData>) {
+  return prisma.contractCategory.update({
+    where: { id },
+    data,
+    include: {
+      _count: {
+        select: { contracts: true },
+      },
+    },
+  });
+}
+
+export async function deleteContractCategory(id: number) {
+  // Check if category has contracts
+  const category = await prisma.contractCategory.findUnique({
+    where: { id },
+    include: { _count: { select: { contracts: true } } },
+  });
+
+  if (category && category._count.contracts > 0) {
+    throw new Error(`Kategorie kann nicht gelöscht werden, da ${category._count.contracts} Verträge zugeordnet sind.`);
+  }
+
+  return prisma.contractCategory.delete({ where: { id } });
+}