feat: discount sale and purchase transactions

packages/server/src/models/Bill.ts

@@ -1,5 +1,5 @@
 import { Model, raw, mixin } from 'objection';
-import { castArray, difference } from 'lodash';
+import { castArray, defaultTo, difference } from 'lodash';
 import moment from 'moment';
 import TenantModel from 'models/TenantModel';
 import BillSettings from './Bill.Settings';
@@ -7,6 +7,7 @@ import ModelSetting from './ModelSetting';
 import CustomViewBaseModel from './CustomViewBaseModel';
 import { DEFAULT_VIEWS } from '@/services/Purchases/Bills/constants';
 import ModelSearchable from './ModelSearchable';
+import { DiscountType } from '@/interfaces';
 
 export default class Bill extends mixin(TenantModel, [
   ModelSetting,
@@ -21,6 +22,11 @@ export default class Bill extends mixin(TenantModel, [
   public taxAmountWithheld: number;
   public exchangeRate: number;
 
+  public discount: number;
+  public discountType: DiscountType;
+
+  public adjustment: number;
+
   /**
    * Timestamps columns.
    */
@@ -103,9 +109,15 @@ export default class Bill extends mixin(TenantModel, [
    * @returns {number}
    */
   get total() {
+    const discountAmount = this.discountType === DiscountType.Amount
+      ? this.discount
+      : this.subtotal * (this.discount / 100);
+
+    const adjustmentAmount = defaultTo(this.adjustment, 0);
+
     return this.isInclusiveTax
-      ? this.subtotal
-      : this.subtotal + this.taxAmountWithheld;
+      ? this.subtotal - discountAmount - adjustmentAmount
+      : this.subtotal + this.taxAmountWithheld - discountAmount - adjustmentAmount;
   }
 
   /**

packages/server/src/models/CreditNote.ts

@@ -5,12 +5,20 @@ import CustomViewBaseModel from './CustomViewBaseModel';
 import { DEFAULT_VIEWS } from '@/services/CreditNotes/constants';
 import ModelSearchable from './ModelSearchable';
 import CreditNoteMeta from './CreditNote.Meta';
+import { DiscountType } from '@/interfaces';
 
 export default class CreditNote extends mixin(TenantModel, [
   ModelSetting,
   CustomViewBaseModel,
   ModelSearchable,
 ]) {
+  public amount: number;
+  public exchangeRate: number;
+  public openedAt: Date;
+  public discount: number;
+  public discountType: DiscountType;
+  public adjustment: number;
+
   /**
    * Table name
    */
@@ -48,6 +56,42 @@ export default class CreditNote extends mixin(TenantModel, [
     return this.amount * this.exchangeRate;
   }
 
+  /**
+   * Credit note subtotal.
+   * @returns {number}
+   */
+  get subtotal() {
+    return this.amount;
+  }
+
+  /**
+   * Credit note subtotal in local currency.
+   * @returns {number}
+   */
+  get subtotalLocal() {
+    return this.subtotal * this.exchangeRate;
+  }
+
+  /**
+   * Credit note total.
+   * @returns {number}
+   */
+  get total() {
+    const discountAmount = this.discountType === DiscountType.Amount
+      ? this.discount
+      : this.subtotal * (this.discount / 100);
+
+    return this.subtotal - discountAmount - this.adjustment;
+  }
+
+  /**
+   * Credit note total in local currency.
+   * @returns {number}
+   */
+  get totalLocal() {
+    return this.total * this.exchangeRate;
+  }
+
   /**
    * Detarmines whether the credit note is draft.
    * @returns {boolean}

packages/server/src/models/SaleEstimate.ts

@@ -7,12 +7,22 @@ import ModelSetting from './ModelSetting';
 import CustomViewBaseModel from './CustomViewBaseModel';
 import { DEFAULT_VIEWS } from '@/services/Sales/Estimates/constants';
 import ModelSearchable from './ModelSearchable';
+import { DiscountType } from '@/interfaces';
+import { defaultTo } from 'lodash';
 
 export default class SaleEstimate extends mixin(TenantModel, [
   ModelSetting,
   CustomViewBaseModel,
   ModelSearchable,
 ]) {
+  public amount: number;
+  public exchangeRate: number;
+
+  public discount: number;
+  public discountType: DiscountType;
+
+  public adjustment: number;
+
   /**
    * Table name
    */
@@ -49,6 +59,44 @@ export default class SaleEstimate extends mixin(TenantModel, [
     return this.amount * this.exchangeRate;
   }
 
+  /**
+   * Estimate subtotal.
+   * @returns {number}
+   */
+  get subtotal() {
+    return this.amount;;
+  }
+
+  /**
+   * Estimate subtotal in local currency.
+   * @returns {number}
+   */
+  get subtotalLocal() {
+    return this.localAmount;
+  }
+
+  /**
+   * Estimate total.
+   * @returns {number}
+   */
+  get total() {
+    const discountAmount = this.discountType === DiscountType.Amount
+      ? this.discount
+      : this.subtotal * (this.discount / 100);
+
+    const adjustmentAmount = defaultTo(this.adjustment, 0);
+
+    return this.subtotal - discountAmount - adjustmentAmount;
+  }
+
+  /**
+   * Estimate total in local currency.
+   * @returns {number}
+   */
+  get totalLocal() {
+    return this.total * this.exchangeRate;
+  }
+
   /**
    * Detarmines whether the sale estimate converted to sale invoice.
    * @return {boolean}

packages/server/src/models/SaleInvoice.ts

@@ -1,5 +1,5 @@
 import { mixin, Model, raw } from 'objection';
-import { castArray, takeWhile } from 'lodash';
+import { castArray, defaultTo, takeWhile } from 'lodash';
 import moment from 'moment';
 import TenantModel from 'models/TenantModel';
 import ModelSetting from './ModelSetting';
@@ -7,6 +7,7 @@ import SaleInvoiceMeta from './SaleInvoice.Settings';
 import CustomViewBaseModel from './CustomViewBaseModel';
 import { DEFAULT_VIEWS } from '@/services/Sales/Invoices/constants';
 import ModelSearchable from './ModelSearchable';
+import { DiscountType } from '@/interfaces';
 
 export default class SaleInvoice extends mixin(TenantModel, [
   ModelSetting,
@@ -23,6 +24,10 @@ export default class SaleInvoice extends mixin(TenantModel, [
   public writtenoffAt: Date;
   public dueDate: Date;
   public deliveredAt: Date;
+  public discount: number;
+  public discountType: DiscountType;
+  public adjustments: number;
+
 
   /**
    * Table name
@@ -130,9 +135,16 @@ export default class SaleInvoice extends mixin(TenantModel, [
    * @returns {number}
    */
   get total() {
+    const discountAmount = this.discountType === DiscountType.Amount
+      ? this.discount
+      : this.subtotal * (this.discount / 100);
+
+    const adjustmentAmount = defaultTo(this.adjustments, 0);
+    const differencies = discountAmount + adjustmentAmount;
+
     return this.isInclusiveTax
-      ? this.subtotal
-      : this.subtotal + this.taxAmountWithheld;
+      ? this.subtotal - differencies
+      : this.subtotal + this.taxAmountWithheld - differencies;
   }
 
   /**

packages/server/src/models/SaleReceipt.ts

@@ -5,12 +5,23 @@ import SaleReceiptSettings from './SaleReceipt.Settings';
 import CustomViewBaseModel from './CustomViewBaseModel';
 import { DEFAULT_VIEWS } from '@/services/Sales/Receipts/constants';
 import ModelSearchable from './ModelSearchable';
+import { DiscountType } from '@/interfaces';
+import { defaultTo } from 'lodash';
 
 export default class SaleReceipt extends mixin(TenantModel, [
   ModelSetting,
   CustomViewBaseModel,
   ModelSearchable,
 ]) {
+  public amount: number;
+  public exchangeRate: number;
+  public closedAt: Date;
+
+  public discount: number;
+  public discountType: DiscountType;
+
+  public adjustment: number;
+
   /**
    * Table name
    */
@@ -40,6 +51,44 @@ export default class SaleReceipt extends mixin(TenantModel, [
     return this.amount * this.exchangeRate;
   }
 
+  /**
+   * Receipt subtotal.
+   * @returns {number}
+   */
+  get subtotal() {
+    return this.amount;
+  }
+
+  /**
+   * Receipt subtotal in local currency.
+   * @returns {number}
+   */
+  get subtotalLocal() {
+    return this.localAmount;
+  }
+
+  /**
+   * Receipt total.
+   * @returns {number}
+   */
+  get total() {
+    const discountAmount = this.discountType === DiscountType.Amount 
+      ? this.discount 
+      : this.subtotal * (this.discount / 100);
+
+    const adjustmentAmount = defaultTo(this.adjustment, 0);
+
+    return this.subtotal - discountAmount - adjustmentAmount;
+  }
+
+  /**
+   * Receipt total in local currency.
+   * @returns {number}
+   */
+  get totalLocal() {
+    return this.total * this.exchangeRate;
+  }
+
   /**
    * Detarmine whether the sale receipt closed.
    * @return {boolean}

packages/server/src/models/VendorCredit.ts

@@ -6,12 +6,20 @@ import CustomViewBaseModel from './CustomViewBaseModel';
 import { DEFAULT_VIEWS } from '@/services/Purchases/VendorCredits/constants';
 import ModelSearchable from './ModelSearchable';
 import VendorCreditMeta from './VendorCredit.Meta';
+import { DiscountType } from '@/interfaces';
 
 export default class VendorCredit extends mixin(TenantModel, [
   ModelSetting,
   CustomViewBaseModel,
   ModelSearchable,
 ]) {
+  public amount: number;
+  public exchangeRate: number;
+  public openedAt: Date;
+  public discount: number;
+  public discountType: DiscountType;
+  public adjustment: number;
+
   /**
    * Table name
    */
@@ -34,6 +42,42 @@ export default class VendorCredit extends mixin(TenantModel, [
     return this.amount * this.exchangeRate;
   }
 
+  /**
+   * Vendor credit subtotal.
+   * @returns {number}
+   */
+  get subtotal() {
+    return this.amount;
+  }
+
+  /**
+   * Vendor credit subtotal in local currency.
+   * @returns {number}
+   */
+  get subtotalLocal() {
+    return this.subtotal * this.exchangeRate;
+  }
+
+  /**
+   * Vendor credit total.
+   * @returns {number}
+   */
+  get total() {
+    const discountAmount = this.discountType === DiscountType.Amount
+      ? this.discount 
+      : this.subtotal * (this.discount / 100);
+
+    return this.subtotal - discountAmount - this.adjustment;
+  }
+
+  /**
+   * Vendor credit total in local currency.
+   * @returns {number}
+   */
+  get totalLocal() {
+    return this.total * this.exchangeRate;
+  }
+
   /**
    * Model modifiers.
    */