wip

packages/server/src/modules/Customers/ValidateBulkDeleteCustomers.service.ts

@@ -0,0 +1,61 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { Knex } from 'knex';
+import { TENANCY_DB_CONNECTION } from '../Tenancy/TenancyDB/TenancyDB.constants';
+import { DeleteCustomer } from './commands/DeleteCustomer.service';
+import { ModelHasRelationsError } from '@/common/exceptions/ModelHasRelations.exception';
+import { ServiceError } from '@/modules/Items/ServiceError';
+
+@Injectable()
+export class ValidateBulkDeleteCustomersService {
+  constructor(
+    private readonly deleteCustomerService: DeleteCustomer,
+    @Inject(TENANCY_DB_CONNECTION)
+    private readonly tenantKnex: () => Knex,
+  ) {}
+
+  public async validateBulkDeleteCustomers(customerIds: number[]): Promise<{
+    deletableCount: number;
+    nonDeletableCount: number;
+    deletableIds: number[];
+    nonDeletableIds: number[];
+  }> {
+    const trx = await this.tenantKnex().transaction({
+      isolationLevel: 'read uncommitted',
+    });
+
+    try {
+      const deletableIds: number[] = [];
+      const nonDeletableIds: number[] = [];
+
+      for (const customerId of customerIds) {
+        try {
+          await this.deleteCustomerService.deleteCustomer(customerId, trx);
+          deletableIds.push(customerId);
+        } catch (error) {
+          if (
+            error instanceof ModelHasRelationsError ||
+            (error instanceof ServiceError &&
+              error.errorType === 'CUSTOMER_HAS_TRANSACTIONS')
+          ) {
+            nonDeletableIds.push(customerId);
+          } else {
+            nonDeletableIds.push(customerId);
+          }
+        }
+      }
+
+      await trx.rollback();
+
+      return {
+        deletableCount: deletableIds.length,
+        nonDeletableCount: nonDeletableIds.length,
+        deletableIds,
+        nonDeletableIds,
+      };
+    } catch (error) {
+      await trx.rollback();
+      throw error;
+    }
+  }
+}
+