fix: Line-level discount

packages/server/src/api/controllers/Purchases/Bills.ts

@@ -127,6 +127,11 @@ export default class BillsController extends BaseController {
         .optional({ nullable: true })
         .isNumeric()
         .toFloat(),
+      check('entries.*.discount_type')
+        .default(DiscountType.Percentage)
+        .isString()
+        .isIn([DiscountType.Percentage, DiscountType.Amount]),
+
       check('entries.*.description').optional({ nullable: true }).trim(),
       check('entries.*.landed_cost')
         .optional({ nullable: true })

packages/server/src/api/controllers/Purchases/VendorCredit.ts

@@ -176,6 +176,10 @@ export default class VendorCreditController extends BaseController {
         .optional({ nullable: true })
         .isNumeric()
         .toFloat(),
+      check('entries.*.discount_type')
+        .default(DiscountType.Percentage)
+        .isString()
+        .isIn([DiscountType.Percentage, DiscountType.Amount]),
       check('entries.*.description').optional({ nullable: true }).trim(),
       check('entries.*.warehouse_id')
         .optional({ nullable: true })
@@ -225,6 +229,10 @@ export default class VendorCreditController extends BaseController {
         .optional({ nullable: true })
         .isNumeric()
         .toFloat(),
+      check('entries.*.discount_type')
+        .default(DiscountType.Percentage)
+        .isString()
+        .isIn([DiscountType.Percentage, DiscountType.Amount]),
       check('entries.*.description').optional({ nullable: true }).trim(),
       check('entries.*.warehouse_id')
         .optional({ nullable: true })

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

@@ -239,6 +239,10 @@ export default class PaymentReceivesController extends BaseController {
         .optional({ nullable: true })
         .isNumeric()
         .toFloat(),
+      check('entries.*.discount_type')
+        .default(DiscountType.Percentage)
+        .isString()
+        .isIn([DiscountType.Percentage, DiscountType.Amount]),
       check('entries.*.description').optional({ nullable: true }).trim(),
       check('entries.*.warehouse_id')
         .optional({ nullable: true })

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

@@ -187,6 +187,11 @@ export default class SalesEstimatesController extends BaseController {
         .optional({ nullable: true })
         .isNumeric()
         .toFloat(),
+      check('entries.*.discount_type')
+        .default(DiscountType.Percentage)
+        .isString()
+        .isIn([DiscountType.Percentage, DiscountType.Amount]),
+
       check('entries.*.warehouse_id')
         .optional({ nullable: true })
         .isNumeric()

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

@@ -243,6 +243,10 @@ export default class SaleInvoicesController extends BaseController {
         .optional({ nullable: true })
         .isNumeric()
         .toFloat(),
+      check('entries.*.discount_type')
+        .default(DiscountType.Percentage)
+        .isString()
+        .isIn([DiscountType.Percentage, DiscountType.Amount]),
       check('entries.*.description').optional({ nullable: true }).trim(),
       check('entries.*.tax_code')
         .optional({ nullable: true })

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

@@ -164,6 +164,11 @@ export default class SalesReceiptsController extends BaseController {
         .optional({ nullable: true })
         .isNumeric()
         .toInt(),
+      check('entries.*.discount_type')
+        .default(DiscountType.Percentage)
+        .isString()
+        .isIn([DiscountType.Percentage, DiscountType.Amount]),
+
       check('entries.*.description').optional({ nullable: true }).trim(),
       check('entries.*.warehouse_id')
         .optional({ nullable: true })

packages/server/src/database/migrations/20241211103019_add_discount_type_to_items_entries_table.js

@@ -0,0 +1,19 @@
+/**
+ * @param { import("knex").Knex } knex
+ * @returns { Promise<void> }
+ */
+exports.up = function (knex) {
+  return knex.schema.alterTable('items_entries', (table) => {
+    table.string('discount_type').defaultTo('percentage').after('discount');
+  });
+};
+
+/**
+ * @param { import("knex").Knex } knex
+ * @returns { Promise<void> }
+ */
+exports.down = function (knex) {
+  return knex.schema.alterTable('items_entries', (table) => {
+    table.dropColumn('discount_type');
+  });
+};

packages/server/src/interfaces/ItemEntry.ts

@@ -13,14 +13,17 @@ export interface IItemEntry {
 
   itemId: number;
   description: string;
+  discountType?: string;
   discount: number;
   quantity: number;
   rate: number;
   amount: number;
 
   total: number;
-  amountInclusingTax: number;
-  amountExludingTax: number;
+  totalExcludingTax?: number;
+
+  subtotalInclusingTax: number;
+  subtotalExcludingTax: number;
   discountAmount: number;
 
   landedCost: number;

packages/server/src/models/ItemEntry.ts

@@ -1,14 +1,20 @@
 import { Model } from 'objection';
 import TenantModel from 'models/TenantModel';
 import { getExlusiveTaxAmount, getInclusiveTaxAmount } from '@/utils/taxRate';
+import { DiscountType } from '@/interfaces';
+
+// Subtotal (qty * rate) (tax inclusive)
+// Subtotal Tax Exclusive (Subtotal - Tax Amount)
+// Discount (Is percentage ? amount * discount : discount)
+// Total (Subtotal - Discount)
 
 export default class ItemEntry extends TenantModel {
   public taxRate: number;
   public discount: number;
   public quantity: number;
   public rate: number;
   public isInclusiveTax: number;
-
+  public discountType: DiscountType;
   /**
    * Table name.
    * @returns {string}
@@ -31,10 +37,24 @@ export default class ItemEntry extends TenantModel {
    */
   static get virtualAttributes() {
     return [
+      // Amount (qty * rate)
       'amount',
+
       'taxAmount',
-      'amountExludingTax',
-      'amountInclusingTax',
+
+      // Subtotal (qty * rate) + (tax inclusive)
+      'subtotalInclusingTax',
+
+      // Subtotal Tax Exclusive (Subtotal - Tax Amount)
+      'subtotalExcludingTax',
+
+      // Subtotal (qty * rate) + (tax inclusive)
+      'subtotal',
+
+      // Discount (Is percentage ? amount * discount : discount)
+      'discountAmount',
+
+      // Total (Subtotal - Discount)
       'total',
     ];
   }
@@ -45,7 +65,15 @@ export default class ItemEntry extends TenantModel {
    * @returns {number}
    */
   get total() {
-    return this.amountInclusingTax;
+    return this.subtotal - this.discountAmount;
+  }
+
+  /**
+   * Total (excluding tax).
+   * @returns {number}
+   */
+  get totalExcludingTax() {
+    return this.subtotalExcludingTax - this.discountAmount;
   }
 
   /**
@@ -57,19 +85,27 @@ export default class ItemEntry extends TenantModel {
     return this.quantity * this.rate;
   }
 
+  /**
+   * Subtotal amount (tax inclusive).
+   * @returns {number}
+   */
+  get subtotal() {
+    return this.subtotalInclusingTax;
+  }
+
   /**
    * Item entry amount including tax.
    * @returns {number}
    */
-  get amountInclusingTax() {
+  get subtotalInclusingTax() {
     return this.isInclusiveTax ? this.amount : this.amount + this.taxAmount;
   }
 
   /**
-   * Item entry amount excluding tax.
+   * Subtotal amount (tax exclusive).
    * @returns {number}
    */
-  get amountExludingTax() {
+  get subtotalExcludingTax() {
     return this.isInclusiveTax ? this.amount - this.taxAmount : this.amount;
   }
 
@@ -78,7 +114,9 @@ export default class ItemEntry extends TenantModel {
    * @returns {number}
    */
   get discountAmount() {
-    return this.amount * (this.discount / 100);
+    return this.discountType === DiscountType.Percentage
+      ? this.amount * (this.discount / 100)
+      : this.discount;
   }
 
   /**

packages/server/src/services/CreditNotes/CreditNoteGLEntries.ts

@@ -210,11 +210,11 @@ export default class CreditNoteGLEntries {
       index: number
     ): ILedgerEntry => {
       const commonEntry = this.getCreditNoteCommonEntry(creditNote);
-      const localAmount = entry.amount * creditNote.exchangeRate;
+      const totalLocal = entry.totalExcludingTax * creditNote.exchangeRate;
 
       return {
         ...commonEntry,
-        debit: localAmount,
+        debit: totalLocal,
         accountId: entry.sellAccountId || entry.item.sellAccountId,
         note: entry.description,
         index: index + 2,

packages/server/src/services/Purchases/Bills/BillGLEntries.ts

@@ -139,13 +139,12 @@ export class BillGLEntries {
   private getBillItemEntry = R.curry(
     (bill: IBill, entry: IItemEntry, index: number): ILedgerEntry => {
       const commonJournalMeta = this.getBillCommonEntry(bill);
-
-      const localAmount = bill.exchangeRate * entry.amountExludingTax;
+      const totalLocal = bill.exchangeRate * entry.totalExcludingTax;
       const landedCostAmount = sumBy(entry.allocatedCostEntries, 'cost');
 
       return {
         ...commonJournalMeta,
-        debit: localAmount + landedCostAmount,
+        debit: totalLocal + landedCostAmount,
         accountId:
           ['inventory'].indexOf(entry.item.type) !== -1
             ? entry.item.inventoryAccountId

packages/server/src/services/Purchases/VendorCredits/VendorCreditGLEntries.ts

@@ -77,11 +77,11 @@ export default class VendorCreditGLEntries {
       index: number
     ): ILedgerEntry => {
       const commonEntity = this.getVendorCreditGLCommonEntry(vendorCredit);
-      const localAmount = entry.amount * vendorCredit.exchangeRate;
+      const totalLocal = entry.totalExcludingTax * vendorCredit.exchangeRate;
 
       return {
         ...commonEntity,
-        credit: localAmount,
+        credit: totalLocal,
         index: index + 2,
         itemId: entry.itemId,
         itemQuantity: entry.quantity,

packages/server/src/services/Sales/Estimates/utils.ts

@@ -13,6 +13,7 @@ export const transformEstimateToPdfTemplate = (
       description: entry.description,
       rate: entry.rateFormatted,
       quantity: entry.quantityFormatted,
+      discount: entry.discountFormatted,
       total: entry.totalFormatted,
     })),
     total: estimate.totalFormatted,
@@ -21,6 +22,7 @@ export const transformEstimateToPdfTemplate = (
     customerNote: estimate.note,
     termsConditions: estimate.termsConditions,
     customerAddress: contactAddressTextFormat(estimate.customer),
+    showLineDiscount: estimate.entries.some((entry) => entry.discountFormatted),
     discount: estimate.discountAmountFormatted,
     discountLabel: estimate.discountPercentageFormatted
       ? `Discount [${estimate.discountPercentageFormatted}]`

packages/server/src/services/Sales/Invoices/CommandSaleInvoiceDTOTransformer.ts

@@ -154,6 +154,6 @@ export class CommandSaleInvoiceDTOTransformer {
    * @returns {number}
    */
   private getDueBalanceItemEntries = (entries: ItemEntry[]) => {
-    return sumBy(entries, (e) => e.amount);
+    return sumBy(entries, (e) => e.total);
   };
 }

packages/server/src/services/Sales/Invoices/InvoiceGLEntries.ts

@@ -199,7 +199,7 @@ export class SaleInvoiceGLEntries {
       index: number
     ): ILedgerEntry => {
       const commonEntry = this.getInvoiceGLCommonEntry(saleInvoice);
-      const localAmount = entry.amountExludingTax * saleInvoice.exchangeRate;
+      const localAmount = entry.totalExcludingTax * saleInvoice.exchangeRate;
 
       return {
         ...commonEntry,

packages/server/src/services/Sales/Invoices/ItemEntryTransformer.ts

@@ -1,4 +1,4 @@
-import { IItemEntry } from '@/interfaces';
+import { DiscountType, IItemEntry } from '@/interfaces';
 import { Transformer } from '@/lib/Transformer/Transformer';
 import { formatNumber } from '@/utils';
 
@@ -8,7 +8,13 @@ export class ItemEntryTransformer extends Transformer {
    * @returns {Array}
    */
   public includeAttributes = (): string[] => {
-    return ['quantityFormatted', 'rateFormatted', 'totalFormatted'];
+    return [
+      'quantityFormatted',
+      'rateFormatted',
+      'totalFormatted',
+      'discountFormatted',
+      'discountAmountFormatted',
+    ];
   };
 
   /**
@@ -43,4 +49,34 @@ export class ItemEntryTransformer extends Transformer {
       money: false,
     });
   };
+
+  /**
+   * Retrieves the formatted discount of item entry.
+   * @param {IItemEntry} entry
+   * @returns {string}
+   */
+  protected discountFormatted = (entry: IItemEntry): string => {
+    if (!entry.discount) {
+      return '';
+    }
+    return entry.discountType === DiscountType.Percentage
+      ? `${entry.discount}%`
+      : formatNumber(entry.discount, {
+          currencyCode: this.context.currencyCode,
+          money: false,
+        });
+  };
+
+  /**
+   * Retrieves the formatted discount amount of item entry.
+   * @param {IItemEntry} entry
+   * @returns {string}
+   */
+  protected discountAmountFormatted = (entry: IItemEntry): string => {
+    return formatNumber(entry.discountAmount, {
+      currencyCode: this.context.currencyCode,
+      money: false,
+      excerptZero: true,
+    });
+  };
 }

packages/server/src/services/Sales/Invoices/utils.ts

@@ -43,13 +43,14 @@ export const transformInvoiceToPdfTemplate = (
       description: entry.description,
       rate: entry.rateFormatted,
       quantity: entry.quantityFormatted,
+      discount: entry.discountFormatted,
       total: entry.totalFormatted,
     })),
     taxes: invoice.taxes.map((tax) => ({
       label: tax.name,
       amount: tax.taxRateAmountFormatted,
     })),
-
+    showLineDiscount: invoice.entries.some((entry) => entry.discountFormatted),
     customerAddress: contactAddressTextFormat(invoice.customer),
   };
 };