feat(nestjs): migrate to NestJS

packages/server/src/modules/Attachments/ValidateAttachments.ts

@@ -0,0 +1,29 @@
+import { castArray, difference } from 'lodash';
+import { Inject, Injectable } from '@nestjs/common';
+import { TenantModelProxy } from '../System/models/TenantBaseModel';
+import { DocumentModel } from './models/Document.model';
+import { ServiceError } from '../Items/ServiceError';
+
+@Injectable()
+export class ValidateAttachments {
+  constructor(
+    @Inject(DocumentModel.name)
+    private readonly documentModel: TenantModelProxy<typeof DocumentModel>,
+  ) {}
+
+  /**
+   * Validates the given file keys existance.
+   * @param {string|string[]} key
+   */
+  async validate(key: string | string[]) {
+    const keys = castArray(key);
+    const documents = await this.documentModel().query().whereIn('key', key);
+    const documentKeys = documents.map((document) => document.key);
+
+    const notFoundKeys = difference(keys, documentKeys);
+
+    if (notFoundKeys.length > 0) {
+      throw new ServiceError('DOCUMENT_KEYS_INVALID');
+    }
+  }
+}