Add a route for easy redirects to the start request flow

src/ROUTES.ts

@@ -372,6 +372,12 @@ const ROUTES = {
         getRoute: (iouType: ValueOf<typeof CONST.IOU.TYPE>, transactionID: string, reportID: string, pageIndex = '', backTo = '') =>
             getUrlWithBackToParam(`create/${iouType}/waypoint/${transactionID}/${reportID}/${pageIndex}`, backTo),
     },
+    // This URL is used as a redirect to one of the create tabs below. This is so that we can message users with a link
+    // straight to those flows without needing to have optimistic transaction and report IDs.
+    MONEY_REQUEST_START: {
+        route: 'start/:iouType/:iouRequestType',
+        getRoute: (iouType: ValueOf<typeof CONST.IOU.TYPE>, iouRequestType: ValueOf<typeof CONST.IOU.REQUEST_TYPE>) => `start/${iouType}/${iouRequestType}` as const,
+    },
     MONEY_REQUEST_CREATE_TAB_DISTANCE: {
         route: 'create/:iouType/start/:transactionID/:reportID/distance',
         getRoute: (iouType: ValueOf<typeof CONST.IOU.TYPE>, transactionID: string, reportID: string) => `create/${iouType}/start/${transactionID}/${reportID}/distance` as const,

src/SCREENS.ts

@@ -118,6 +118,7 @@ const SCREENS = {
         DISTANCE_TAB: 'distance',
         CREATE: 'Money_Request_Create',
         STEP_CONFIRMATION: 'Money_Request_Step_Confirmation',
+        START: 'Money_Request_Start',
         STEP_AMOUNT: 'Money_Request_Step_Amount',
         STEP_CATEGORY: 'Money_Request_Step_Category',
         STEP_CURRENCY: 'Money_Request_Step_Currency',

src/libs/Navigation/AppNavigator/ModalStackNavigators.tsx

@@ -73,6 +73,7 @@ function createModalStackNavigator<TStackParams extends ParamListBase>(screens:
 }
 
 const MoneyRequestModalStackNavigator = createModalStackNavigator<MoneyRequestNavigatorParamList>({
+    [SCREENS.MONEY_REQUEST.START]: () => require('../../../pages/iou/request/IOURequestRedirectToStartPage').default as React.ComponentType,
     [SCREENS.MONEY_REQUEST.CREATE]: () => require('../../../pages/iou/request/IOURequestStartPage').default as React.ComponentType,
     [SCREENS.MONEY_REQUEST.STEP_CONFIRMATION]: () => require('../../../pages/iou/request/step/IOURequestStepConfirmation').default as React.ComponentType,
     [SCREENS.MONEY_REQUEST.STEP_AMOUNT]: () => require('../../../pages/iou/request/step/IOURequestStepAmount').default as React.ComponentType,

src/libs/Navigation/linkingConfig.ts

@@ -370,6 +370,7 @@ const linkingConfig: LinkingOptions<RootStackParamList> = {
                     },
                     [SCREENS.RIGHT_MODAL.MONEY_REQUEST]: {
                         screens: {
+                            [SCREENS.MONEY_REQUEST.START]: ROUTES.MONEY_REQUEST_START.route,
                             [SCREENS.MONEY_REQUEST.CREATE]: {
                                 path: ROUTES.MONEY_REQUEST_CREATE.route,
                                 exact: true,

src/pages/iou/request/IOURequestRedirectToStartPage.js

@@ -0,0 +1,69 @@
+import PropTypes from 'prop-types';
+import React, {useEffect} from 'react';
+import _ from 'underscore';
+import FullPageNotFoundView from '@components/BlockingViews/FullPageNotFoundView';
+import ScreenWrapper from '@components/ScreenWrapper';
+import Navigation from '@libs/Navigation/Navigation';
+import * as ReportUtils from '@libs/ReportUtils';
+import CONST from '@src/CONST';
+import ROUTES from '@src/ROUTES';
+
+const propTypes = {
+    /** Navigation route context info provided by react navigation */
+    route: PropTypes.shape({
+        /** Route specific parameters used on this screen */
+        params: PropTypes.shape({
+            /** The type of IOU report, i.e. bill, request, send */
+            iouType: PropTypes.oneOf(_.values(CONST.IOU.TYPE)).isRequired,
+
+            /** The type of IOU Request, i.e. manual, scan, distance */
+            iouRequestType: PropTypes.oneOf(_.values(CONST.IOU.REQUEST_TYPE)).isRequired,
+        }),
+    }).isRequired,
+};
+
+function IOURequestRedirectToStartPage({
+    route: {
+        params: {iouType, iouRequestType},
+    },
+}) {
+    const isIouTypeValid = _.values(CONST.IOU.TYPE).includes(iouType);
+    const isIouRequestTypeValid = _.values(CONST.IOU.REQUEST_TYPE).includes(iouRequestType);
+
+    useEffect(() => {
+        if (!isIouTypeValid || !isIouRequestTypeValid) {
+            return;
+        }
+
+        // Dismiss this modal because the redirects below will open a new modal and there shouldn't be two modals stacked on top of each other.
+        Navigation.dismissModal();
+
+        // Redirect the person to the right start page using a rendom reportID
+        const optimisticReportID = ReportUtils.generateReportID();
+        if (iouRequestType === CONST.IOU.REQUEST_TYPE.DISTANCE) {
+            Navigation.navigate(ROUTES.MONEY_REQUEST_CREATE_TAB_DISTANCE.getRoute(iouType, CONST.IOU.OPTIMISTIC_TRANSACTION_ID, optimisticReportID));
+        } else if (iouRequestType === CONST.IOU.REQUEST_TYPE.MANUAL) {
+            Navigation.navigate(ROUTES.MONEY_REQUEST_CREATE_TAB_MANUAL.getRoute(iouType, CONST.IOU.OPTIMISTIC_TRANSACTION_ID, optimisticReportID));
+        } else if (iouRequestType === CONST.IOU.REQUEST_TYPE.SCAN) {
+            Navigation.navigate(ROUTES.MONEY_REQUEST_CREATE_TAB_SCAN.getRoute(iouType, CONST.IOU.OPTIMISTIC_TRANSACTION_ID, optimisticReportID));
+        }
+
+        // This useEffect should only run on mount which is why there are no dependencies being passed in the second parameter
+        // eslint-disable-next-line react-hooks/exhaustive-deps
+    }, []);
+
+    if (!isIouTypeValid || !isIouRequestTypeValid) {
+        return (
+            <ScreenWrapper testID={IOURequestRedirectToStartPage.displayName}>
+                <FullPageNotFoundView shouldShow />
+            </ScreenWrapper>
+        );
+    }
+
+    return null;
+}
+
+IOURequestRedirectToStartPage.displayName = 'IOURequestRedirectToStartPage';
+IOURequestRedirectToStartPage.propTypes = propTypes;
+
+export default IOURequestRedirectToStartPage;