fix: Distance rate- WS owner can create multiple distance rate with same amount.

src/languages/en.ts

@@ -47,6 +47,7 @@ import type {
     ConnectionParams,
     CurrencyCodeParams,
     CustomersOrJobsLabelParams,
+    CustomUnitRateParams,
     DateParams,
     DateShouldBeAfterParams,
     DateShouldBeBeforeParams,
@@ -2545,6 +2546,9 @@ const translations = {
                 title: 'Per diem',
                 subtitle: 'Set per diem rates to control daily employee spend. Import rates from a spreadsheet to get started.',
             },
+            errors: {
+                existingRateError: ({rate}: CustomUnitRateParams) => `A rate with value ${rate} already exists.`,
+            },
         },
         qbd: {
             exportOutOfPocketExpensesDescription: 'Set how out-of-pocket expenses export to QuickBooks Desktop.',

src/languages/es.ts

@@ -46,6 +46,7 @@ import type {
     ConnectionParams,
     CurrencyCodeParams,
     CustomersOrJobsLabelParams,
+    CustomUnitRateParams,
     DateParams,
     DateShouldBeAfterParams,
     DateShouldBeBeforeParams,
@@ -2569,6 +2570,9 @@ const translations = {
                 title: 'Per diem',
                 subtitle: 'Establece dietas per diem para controlar el gasto diario de los empleados. Importa las tarifas desde una hoja de cálculo para comenzar.',
             },
+            errors: {
+                existingRateError: ({rate}: CustomUnitRateParams) => `Ya existe una tasa con el valor ${rate}.`,
+            },
         },
         qbd: {
             exportOutOfPocketExpensesDescription: 'Establezca cómo se exportan los gastos de bolsillo a QuickBooks Desktop.',

src/languages/params.ts

@@ -559,6 +559,10 @@ type CompanyNameParams = {
     companyName: string;
 };
 
+type CustomUnitRateParams = {
+    rate: number;
+};
+
 export type {
     AuthenticationErrorParams,
     ImportMembersSuccessfullDescriptionParams,
@@ -761,4 +765,5 @@ export type {
     ImportedTypesParams,
     CurrencyCodeParams,
     CompanyNameParams,
+    CustomUnitRateParams,
 };

src/libs/PolicyDistanceRatesUtils.ts

@@ -11,14 +11,33 @@ type RateValueForm = typeof ONYXKEYS.FORMS.POLICY_CREATE_DISTANCE_RATE_FORM | ty
 
 type TaxReclaimableForm = typeof ONYXKEYS.FORMS.POLICY_DISTANCE_RATE_TAX_RECLAIMABLE_ON_EDIT_FORM;
 
-function validateRateValue(values: FormOnyxValues<RateValueForm>, currency: string, toLocaleDigit: (arg: string) => string): FormInputErrors<RateValueForm> {
+function validateRateValue(
+    values: FormOnyxValues<RateValueForm>,
+    customUnitRates: Record<string, Rate>,
+    currency: string,
+    toLocaleDigit: (arg: string) => string,
+    currentRateValue?: number,
+): FormInputErrors<RateValueForm> {
     const errors: FormInputErrors<RateValueForm> = {};
     const parsedRate = MoneyRequestUtils.replaceAllDigits(values.rate, toLocaleDigit);
     const decimalSeparator = toLocaleDigit('.');
+    const ratesList = Object.values(customUnitRates);
+    // The following logic replicates the backend's handling of rates:
+    // - Multiply the rate by 100 (CUSTOM_UNIT_RATE_BASE_OFFSET) to scale it, ensuring precision.
+    // - This ensures rates are converted as follows:
+    //   12       -> 1200
+    //   12.1     -> 1210
+    //   12.01    -> 1201
+    //   12.001   -> 1200.1
+    //   12.0001  -> 1200.01
+    // - Using parseFloat and toFixed(10) retains the necessary precision.
+    const convertedRate = parseFloat((Number(values.rate || 0) * CONST.POLICY.CUSTOM_UNIT_RATE_BASE_OFFSET).toFixed(10));
 
     // Allow one more decimal place for accuracy
     const rateValueRegex = RegExp(String.raw`^-?\d{0,8}([${getPermittedDecimalSeparator(decimalSeparator)}]\d{0,${CONST.MAX_TAX_RATE_DECIMAL_PLACES}})?$`, 'i');
-    if (!rateValueRegex.test(parsedRate) || parsedRate === '') {
+    if (ratesList.some((r) => r.rate === convertedRate && !(currentRateValue && currentRateValue === r.rate))) {
+        errors.rate = Localize.translateLocal('workspace.perDiem.errors.existingRateError', {rate: NumberUtils.parseFloatAnyLocale(parsedRate)});
+    } else if (!rateValueRegex.test(parsedRate) || parsedRate === '') {
         errors.rate = Localize.translateLocal('common.error.invalidRateError');
     } else if (NumberUtils.parseFloatAnyLocale(parsedRate) <= 0) {
         errors.rate = Localize.translateLocal('common.error.lowRateError');

src/pages/workspace/distanceRates/CreateDistanceRatePage.tsx

@@ -41,8 +41,8 @@ function CreateDistanceRatePage({route}: CreateDistanceRatePageProps) {
     const FullPageBlockingView = !customUnitID ? FullPageOfflineBlockingView : View;
 
     const validate = useCallback(
-        (values: FormOnyxValues<typeof ONYXKEYS.FORMS.POLICY_CREATE_DISTANCE_RATE_FORM>) => validateRateValue(values, currency, toLocaleDigit),
-        [currency, toLocaleDigit],
+        (values: FormOnyxValues<typeof ONYXKEYS.FORMS.POLICY_CREATE_DISTANCE_RATE_FORM>) => validateRateValue(values, customUnit?.rates ?? {}, currency, toLocaleDigit),
+        [currency, toLocaleDigit, customUnit?.rates],
     );
 
     const submit = (values: FormOnyxValues<typeof ONYXKEYS.FORMS.POLICY_CREATE_DISTANCE_RATE_FORM>) => {

src/pages/workspace/distanceRates/PolicyDistanceRateEditPage.tsx

@@ -52,8 +52,8 @@ function PolicyDistanceRateEditPage({route}: PolicyDistanceRateEditPageProps) {
     };
 
     const validate = useCallback(
-        (values: FormOnyxValues<typeof ONYXKEYS.FORMS.POLICY_DISTANCE_RATE_EDIT_FORM>) => validateRateValue(values, currency, toLocaleDigit),
-        [currency, toLocaleDigit],
+        (values: FormOnyxValues<typeof ONYXKEYS.FORMS.POLICY_DISTANCE_RATE_EDIT_FORM>) => validateRateValue(values, customUnit?.rates ?? {}, currency, toLocaleDigit, rate?.rate),
+        [currency, toLocaleDigit, customUnit?.rates, rate?.rate],
     );
 
     if (!rate) {