- feat: Sales estimates APIs.

- feat: Sales invoices APIs.
- feat: Sales receipts APIs.
- WIP: Sales payment receipts.
- WIP: Purchases bills.
- WIP: Purchases payments made.

server/src/services/Items/ItemsService.js

@@ -0,0 +1,21 @@
+import { difference } from "lodash";
+import { Item } from '@/models';
+
+export default class ItemsService {
+
+  /**
+   * Validates the given items IDs exists or not returns the not found ones.
+   * @param {Array} itemsIDs 
+   * @return {Array}
+   */
+  static async isItemsIdsExists(itemsIDs) {
+    const storedItems = await Item.tenant().query().whereIn('id', itemsIDs);
+    const storedItemsIds = storedItems.map((t) => t.id);
+
+    const notFoundItemsIds = difference(
+      itemsIDs,
+      storedItemsIds,
+    );
+    return notFoundItemsIds;
+  }
+}