refactor: migrate ledger writer to nestjs

packages/server-nest/src/modules/Bills/models/Bill.ts

@@ -1,6 +1,7 @@
 import { Model, raw, mixin } from 'objection';
-import { castArray, difference } from 'lodash';
-import moment from 'moment';
+import { castArray, difference, defaultTo } from 'lodash';
+import * as moment from 'moment';
+import * as R from 'ramda';
 // import TenantModel from 'models/TenantModel';
 // import BillSettings from './Bill.Settings';
 // import ModelSetting from './ModelSetting';
@@ -8,10 +9,11 @@ import moment from 'moment';
 // import { DEFAULT_VIEWS } from '@/services/Purchases/Bills/constants';
 // import ModelSearchable from './ModelSearchable';
 import { BaseModel } from '@/models/Model';
-import { ItemEntry } from '@/modules/Items/models/ItemEntry';
+import { ItemEntry } from '@/modules/TransactionItemEntry/models/ItemEntry';
 import { BillLandedCost } from '@/modules/BillLandedCosts/models/BillLandedCost';
+import { DiscountType } from '@/common/types/Discount';
 
-export class Bill extends BaseModel{
+export class Bill extends BaseModel {
   public amount: number;
   public paymentAmount: number;
   public landedCostAmount: number;
@@ -33,6 +35,10 @@ export class Bill extends BaseModel{
   public openedAt: Date | string;
   public userId: number;
 
+  public discountType: DiscountType;
+  public discount: number;
+  public adjustment: number;
+
   public branchId: number;
   public warehouseId: number;
   public projectId: number;
@@ -68,9 +74,16 @@ export class Bill extends BaseModel{
       'localAllocatedCostAmount',
       'billableAmount',
       'amountLocal',
+
+      'discountAmount',
+      'discountAmountLocal',
+      'discountPercentage',
+
+      'adjustmentLocal',
+
       'subtotal',
       'subtotalLocal',
-      'subtotalExcludingTax',
+      'subtotalExludingTax',
       'taxAmountWithheldLocal',
       'total',
       'totalLocal',
@@ -119,14 +132,53 @@ export class Bill extends BaseModel{
     return this.taxAmountWithheld * this.exchangeRate;
   }
 
+  /**
+   * Discount amount.
+   * @returns {number}
+   */
+  get discountAmount() {
+    return this.discountType === DiscountType.Amount
+      ? this.discount
+      : this.subtotal * (this.discount / 100);
+  }
+
+  /**
+   * Discount amount in local currency.
+   * @returns {number | null}
+   */
+  get discountAmountLocal() {
+    return this.discountAmount ? this.discountAmount * this.exchangeRate : null;
+  }
+
+  /**
+  /**
+   * Discount percentage.
+   * @returns {number | null}
+   */
+  get discountPercentage(): number | null {
+    return this.discountType === DiscountType.Percentage ? this.discount : null;
+  }
+
+  /**
+   * Adjustment amount in local currency.
+   * @returns {number | null}
+   */
+  get adjustmentLocal() {
+    return this.adjustment ? this.adjustment * this.exchangeRate : null;
+  }
+
   /**
    * Invoice total. (Tax included)
    * @returns {number}
    */
   get total() {
-    return this.isInclusiveTax
-      ? this.subtotal
-      : this.subtotal + this.taxAmountWithheld;
+    const adjustmentAmount = defaultTo(this.adjustment, 0);
+
+    return R.compose(
+      R.add(adjustmentAmount),
+      R.subtract(R.__, this.discountAmount),
+      R.when(R.always(this.isInclusiveTax), R.add(this.taxAmountWithheld)),
+    )(this.subtotal);
   }
 
   /**
@@ -183,7 +235,7 @@ export class Bill extends BaseModel{
           raw(`COALESCE(AMOUNT, 0) -
             COALESCE(PAYMENT_AMOUNT, 0) -
             COALESCE(CREDITED_AMOUNT, 0) > 0
-          `)
+          `),
         );
       },
       /**