feat: add discount to sale and purchase transactions

packages/server/src/api/controllers/Sales/SalesInvoices.ts

@@ -281,6 +281,13 @@ export default class SaleInvoicesController extends BaseController {
       check('payment_methods').optional({ nullable: true }).isArray(),
       check('payment_methods.*.payment_integration_id').exists().toInt(),
       check('payment_methods.*.enable').exists().isBoolean(),
+
+      // Discount
+      check('discount').optional({ nullable: true }).isNumeric().toFloat(),
+      check('discount_type').optional({ nullable: true }).isString().trim(),
+
+      // Adjustments
+      check('adjustment').optional({ nullable: true }).isArray(),
     ];
   }
 

packages/server/src/database/migrations/20241128080734_add_discount_to_invoices_table.js

@@ -0,0 +1,23 @@
+/**
+ * @param { import("knex").Knex } knex
+ * @returns { Promise<void> }
+ */
+exports.up = function (knex) {
+  return knex.schema.alterTable('sales_invoices', (table) => {
+    table.decimal('discount', 10, 2).nullable().after('credited_amount');
+    table.string('discount_type').nullable().after('discount');
+    table.decimal('adjustments', 10, 2).nullable().after('discount_type'); 
+  });
+};
+
+/**
+ * @param { import("knex").Knex } knex
+ * @returns { Promise<void> }
+ */
+exports.down = function (knex) {
+  return knex.schema.alterTable('sale_invoices', (table) => {
+    table.dropColumn('discount');
+    table.dropColumn('discount_type');
+    table.dropColumn('adjustments');
+  });
+};

packages/server/src/interfaces/SaleInvoice.ts

@@ -102,6 +102,13 @@ export interface ISaleInvoiceDTO {
   isInclusiveTax?: boolean;
 
   attachments?: AttachmentLinkDTO[];
+
+  // # Discount
+  discount?: number;
+  discountType?: string;
+
+  // # Adjustments
+  adjustments?: string;
 }
 
 export interface ISaleInvoiceCreateDTO extends ISaleInvoiceDTO {