first commit

backend/src/services/provider.service.ts

@@ -0,0 +1,79 @@
+import { PrismaClient } from '@prisma/client';
+
+const prisma = new PrismaClient();
+
+export async function getAllProviders(includeInactive = false) {
+  const where = includeInactive ? {} : { isActive: true };
+  return prisma.provider.findMany({
+    where,
+    orderBy: { name: 'asc' },
+    include: {
+      tariffs: {
+        where: includeInactive ? {} : { isActive: true },
+        orderBy: { name: 'asc' },
+      },
+      _count: {
+        select: { contracts: true, tariffs: true },
+      },
+    },
+  });
+}
+
+export async function getProviderById(id: number) {
+  return prisma.provider.findUnique({
+    where: { id },
+    include: {
+      tariffs: {
+        orderBy: { name: 'asc' },
+      },
+      _count: {
+        select: { contracts: true },
+      },
+    },
+  });
+}
+
+export async function createProvider(data: {
+  name: string;
+  portalUrl?: string;
+  usernameFieldName?: string;
+  passwordFieldName?: string;
+}) {
+  return prisma.provider.create({
+    data: {
+      ...data,
+      isActive: true,
+    },
+  });
+}
+
+export async function updateProvider(
+  id: number,
+  data: {
+    name?: string;
+    portalUrl?: string;
+    usernameFieldName?: string;
+    passwordFieldName?: string;
+    isActive?: boolean;
+  }
+) {
+  return prisma.provider.update({
+    where: { id },
+    data,
+  });
+}
+
+export async function deleteProvider(id: number) {
+  // Check if provider is used by any contracts
+  const count = await prisma.contract.count({
+    where: { providerId: id },
+  });
+
+  if (count > 0) {
+    throw new Error(
+      `Anbieter kann nicht gelöscht werden, da er von ${count} Verträgen verwendet wird`
+    );
+  }
+
+  return prisma.provider.delete({ where: { id } });
+}