feat: loyalty program validations

models/baseModels/Party/Party.ts

@@ -20,6 +20,7 @@ export class Party extends Doc {
   party?: string;
   fromLead?: string;
   defaultAccount?: string;
+  loyaltyPoints?: number;
   outstandingAmount?: Money;
   async updateOutstandingAmount() {
     /**

models/baseModels/SalesInvoice/SalesInvoice.ts

@@ -1,11 +1,18 @@
-import { Fyo } from 'fyo';
-import { Action, ListViewSettings } from 'fyo/model/types';
+import { Fyo, t } from 'fyo';
+import { Action, ListViewSettings, ValidationMap } from 'fyo/model/types';
 import { LedgerPosting } from 'models/Transactional/LedgerPosting';
 import { ModelNameEnum } from 'models/types';
-import { getAddedLPWithGrandTotal, getInvoiceActions, getTransactionStatusColumn } from '../../helpers';
+import {
+  getAddedLPWithGrandTotal,
+  getInvoiceActions,
+  getTransactionStatusColumn,
+} from '../../helpers';
 import { Invoice } from '../Invoice/Invoice';
 import { SalesInvoiceItem } from '../SalesInvoiceItem/SalesInvoiceItem';
 import { LoyaltyProgram } from '../LoyaltyProgram/LoyaltyProgram';
+import { DocValue } from 'fyo/core/types';
+import { Party } from '../Party/Party';
+import { ValidationError } from 'fyo/utils/errors';
 
 export class SalesInvoice extends Invoice {
   items?: SalesInvoiceItem[];
@@ -47,7 +54,6 @@ export class SalesInvoice extends Invoice {
       await posting.credit(this.account!, totalAmount);
     }
 
-
     if (this.taxes) {
       for (const tax of this.taxes) {
         if (this.isReturn) {
@@ -73,6 +79,50 @@ export class SalesInvoice extends Invoice {
     return posting;
   }
 
+  validations: ValidationMap = {
+    loyaltyPoints: async (value: DocValue) => {
+      if (!this.redeemLoyaltyPoints) {
+        return;
+      }
+
+      const partyDoc = (await this.fyo.doc.getDoc(
+        ModelNameEnum.Party,
+        this.party
+      )) as Party;
+
+      if ((value as number) <= 0) {
+        throw new ValidationError(t`Points must be greather than 0`);
+      }
+
+      if ((value as number) > (partyDoc?.loyaltyPoints || 0)) {
+        throw new ValidationError(
+          t`${this.party as string} only has ${
+            partyDoc.loyaltyPoints as number
+          } points`
+        );
+      }
+
+      const loyaltyProgramDoc = (await this.fyo.doc.getDoc(
+        ModelNameEnum.LoyaltyProgram,
+        this.loyaltyProgram
+      )) as LoyaltyProgram;
+
+      if (!this?.grandTotal) {
+        return;
+      }
+
+      const loyaltyPoint =
+        ((value as number) || 0) *
+        ((loyaltyProgramDoc?.conversionFactor as number) || 0);
+
+      if (this.grandTotal?.lt(loyaltyPoint)) {
+        throw new ValidationError(
+          t`no need ${value as number} points to purchase this item`
+        );
+      }
+    },
+  };
+
   static getListViewSettings(): ListViewSettings {
     return {
       columns: [