Migrate to mono-repo

webapp/channels/src/actions/hosted_customer.tsx

@@ -6,7 +6,7 @@ import {Stripe} from '@stripe/stripe-js';
 import {getCode} from 'country-list';
 
 import {CreateSubscriptionRequest} from '@mattermost/types/cloud';
-import {SelfHostedSignupProgress} from '@mattermost/types/hosted_customer';
+import {SelfHostedExpansionRequest, SelfHostedSignupProgress} from '@mattermost/types/hosted_customer';
 import {ValueOf} from '@mattermost/types/utilities';
 
 import {Client4} from 'mattermost-redux/client';
@@ -198,3 +198,89 @@ export function getTrueUpReviewStatus(): ActionFunc {
         onRequest: HostedCustomerTypes.TRUE_UP_REVIEW_STATUS_REQUEST,
     });
 }
+
+export function confirmSelfHostedExpansion(
+    stripe: Stripe,
+    stripeSetupIntent: StripeSetupIntent,
+    isDevMode: boolean,
+    billingDetails: BillingDetails,
+    initialProgress: ValueOf<typeof SelfHostedSignupProgress>,
+    expansionRequest: SelfHostedExpansionRequest,
+): ActionFunc {
+    return async (dispatch: DispatchFunc) => {
+        const cardSetupFunction = getConfirmCardSetup(isDevMode);
+        const confirmCardSetup = cardSetupFunction(stripe.confirmCardSetup);
+
+        const shouldConfirmCard = selfHostedNeedsConfirmation(initialProgress);
+        if (shouldConfirmCard) {
+            const result = await confirmCardSetup(
+                stripeSetupIntent.client_secret,
+                {
+                    payment_method: {
+                        card: billingDetails.card,
+                        billing_details: {
+                            name: billingDetails.name,
+                            address: {
+                                line1: billingDetails.address,
+                                line2: billingDetails.address2,
+                                city: billingDetails.city,
+                                state: billingDetails.state,
+                                country: getCode(billingDetails.country),
+                                postal_code: billingDetails.postalCode,
+                            },
+                        },
+                    },
+                },
+            );
+
+            if (!result) {
+                return {data: false, error: 'failed to confirm card with Stripe'};
+            }
+
+            const {setupIntent, error: stripeError} = result;
+
+            if (stripeError) {
+                if (stripeError.code === STRIPE_UNEXPECTED_STATE && stripeError.message === STRIPE_ALREADY_SUCCEEDED && stripeError.setup_intent?.status === 'succeeded') {
+                    dispatch({
+                        type: HostedCustomerTypes.RECEIVED_SELF_HOSTED_SIGNUP_PROGRESS,
+                        data: SelfHostedSignupProgress.CONFIRMED_INTENT,
+                    });
+                } else {
+                    return {data: false, error: stripeError.message || 'Stripe failed to confirm payment method'};
+                }
+            } else {
+                if (setupIntent === null || setupIntent === undefined) {
+                    return {data: false, error: 'Stripe did not return successful setup intent'};
+                }
+
+                if (setupIntent.status !== 'succeeded') {
+                    return {data: false, error: `Stripe setup intent status was: ${setupIntent.status}`};
+                }
+                dispatch({
+                    type: HostedCustomerTypes.RECEIVED_SELF_HOSTED_SIGNUP_PROGRESS,
+                    data: SelfHostedSignupProgress.CONFIRMED_INTENT,
+                });
+            }
+        }
+
+        let confirmResult;
+        try {
+            confirmResult = await Client4.confirmSelfHostedExpansion(stripeSetupIntent.id, expansionRequest);
+            dispatch({
+                type: HostedCustomerTypes.RECEIVED_SELF_HOSTED_SIGNUP_PROGRESS,
+                data: confirmResult.progress,
+            });
+        } catch (error) {
+            // eslint-disable-next-line no-console
+            console.error(error);
+
+            // unprocessable entity, e.g. failed export compliance
+            if (error.status_code === 422) {
+                return {data: false, error: error.status_code};
+            }
+            return {data: false, error};
+        }
+
+        return {data: confirmResult.license};
+    };
+}

webapp/channels/src/components/admin_console/license_settings/enterprise_edition/enterprise_edition.scss

@@ -104,7 +104,7 @@
 
         .license-details-top {
             display: flex;
-            justify-content: flex-start;
+            justify-content: space-between;
             font-size: 14px;
             font-weight: 700;
             line-height: 24px;
@@ -114,10 +114,11 @@
                 color: #3f4350;
             }
 
-            span.expiration-days {
-                margin-left: auto;
-                color: var(--denim-status-online);
+            .add-seats-button {
+                border-radius: 4px;
+                font-family: 'Open Sans', sans-serif;
                 font-size: 12px;
+                font-weight: 600;
             }
         }
 
@@ -157,6 +158,20 @@
                         font-weight: 600;
                     }
                 }
+
+                span.expiration-days {
+                    margin-left: 8px;
+                    font-size: 14px;
+                    font-weight: 600;
+
+                    &-warning {
+                        color: var(--sys-away-indicator);
+                    }
+
+                    &-danger {
+                        color: var(--dnd-indicator);
+                    }
+                }
             }
 
             .add-new-licence-btn {
@@ -194,4 +209,4 @@
             }
         }
     }
-}
+}

webapp/channels/src/components/admin_console/license_settings/enterprise_edition/enterprise_edition_left_panel.test.tsx

@@ -6,15 +6,20 @@ import {screen} from '@testing-library/react';
 
 import {Provider} from 'react-redux';
 
+import moment from 'moment-timezone';
+
 import {mountWithIntl} from 'tests/helpers/intl-test-helper';
 import {renderWithIntl} from 'tests/react_testing_utils';
-import {OverActiveUserLimits} from 'utils/constants';
+import {OverActiveUserLimits, SelfHostedProducts} from 'utils/constants';
+import {TestHelper} from 'utils/test_helper';
 
 import {General} from 'mattermost-redux/constants';
 import {DeepPartial} from '@mattermost/types/utilities';
 import {GlobalState} from '@mattermost/types/store';
 import mockStore from 'tests/test_store';
 
+import * as useCanSelfHostedExpand from 'components/common/hooks/useCanSelfHostedExpand';
+
 import EnterpriseEditionLeftPanel, {EnterpriseEditionProps} from './enterprise_edition_left_panel';
 
 describe('components/admin_console/license_settings/enterprise_edition/enterprise_edition_left_panel', () => {
@@ -26,7 +31,7 @@ describe('components/admin_console/license_settings/enterprise_edition/enterpris
         SkuShortName: 'Enterprise',
         Name: 'LicenseName',
         Company: 'Mattermost Inc.',
-        Users: '1000000',
+        Users: '1000',
     };
 
     const initialState: DeepPartial<GlobalState> = {
@@ -45,10 +50,36 @@ describe('components/admin_console/license_settings/enterprise_edition/enterpris
             },
             general: {
                 license,
+                config: {
+                    BuildEnterpriseReady: 'true',
+                },
             },
             preferences: {
                 myPreferences: {},
             },
+            admin: {
+                config: {
+                    ServiceSettings: {
+                        SelfHostedExpansion: true,
+                    },
+                },
+            },
+            cloud: {
+                subscription: undefined,
+            },
+            hostedCustomer: {
+                products: {
+                    products: {
+                        prod_professional: TestHelper.getProductMock({
+                            id: 'prod_professional',
+                            name: 'Professional',
+                            sku: SelfHostedProducts.PROFESSIONAL,
+                            price_per_seat: 7.5,
+                        }),
+                    },
+                    productsLoaded: true,
+                },
+            },
         },
     };
 
@@ -80,12 +111,12 @@ describe('components/admin_console/license_settings/enterprise_edition/enterpris
 
         const item = wrapper.find('.item-element').filterWhere((n) => {
             return n.children().length === 2 &&
-                   n.childAt(0).type() === 'span' &&
-                   !n.childAt(0).text().includes('ACTIVE') &&
-                   n.childAt(0).text().includes('USERS');
+                n.childAt(0).type() === 'span' &&
+                !n.childAt(0).text().includes('ACTIVE') &&
+                n.childAt(0).text().includes('USERS');
         });
 
-        expect(item.text()).toContain('1,000,000');
+        expect(item.text()).toContain('1,000');
     });
 
     test('should not add any class if active users is lower than the minimal', async () => {
@@ -146,4 +177,47 @@ describe('components/admin_console/license_settings/enterprise_edition/enterpris
         expect(screen.getByText('ACTIVE USERS:')).not.toHaveClass('legend--warning-over-seats-purchased');
         expect(screen.getByText('ACTIVE USERS:')).toHaveClass('legend--over-seats-purchased');
     });
+
+    test('should add warning class to days expired indicator when there are more than 5 days until expiry', async () => {
+        license.ExpiresAt = moment().add(6, 'days').valueOf().toString();
+        const store = await mockStore(initialState);
+        renderWithIntl(
+            <Provider store={store}>
+                <EnterpriseEditionLeftPanel
+                    {...props}
+                />
+            </Provider>,
+        );
+
+        expect(screen.getByText('Expires in 6 days')).toHaveClass('expiration-days-warning');
+    });
+
+    test('should add danger class to days expired indicator when there are at least 5 days until expiry', async () => {
+        license.ExpiresAt = moment().add(5, 'days').valueOf().toString();
+        const store = await mockStore(initialState);
+        renderWithIntl(
+            <Provider store={store}>
+                <EnterpriseEditionLeftPanel
+                    {...props}
+                />
+            </Provider>,
+        );
+
+        expect(screen.getByText('Expires in 5 days')).toHaveClass('expiration-days-danger');
+    });
+
+    test('should display add seats button when there are more than 60 days until expiry and self hosted expansion is available', async () => {
+        license.ExpiresAt = moment().add(61, 'days').valueOf().toString();
+        const store = await mockStore(initialState);
+        jest.spyOn(useCanSelfHostedExpand, 'default').mockImplementation(() => true);
+        renderWithIntl(
+            <Provider store={store}>
+                <EnterpriseEditionLeftPanel
+                    {...props}
+                />
+            </Provider>,
+        );
+
+        expect(screen.getByText('+ Add seats')).toBeVisible();
+    });
 });

webapp/channels/src/components/admin_console/license_settings/enterprise_edition/enterprise_edition_left_panel.tsx

@@ -4,6 +4,7 @@
 import React, {RefObject, useEffect, useState} from 'react';
 import classNames from 'classnames';
 import {FormattedDate, FormattedMessage, FormattedNumber, FormattedTime, useIntl} from 'react-intl';
+import {useSelector} from 'react-redux';
 
 import Tag from 'components/widgets/tag/tag';
 
@@ -15,9 +16,16 @@ import {getRemainingDaysFromFutureTimestamp, toTitleCase} from 'utils/utils';
 import {FileTypes} from 'utils/constants';
 import {getSkuDisplayName} from 'utils/subscription';
 import {calculateOverageUserActivated} from 'utils/overage_team';
+import {getConfig} from 'mattermost-redux/selectors/entities/admin';
 
 import './enterprise_edition.scss';
 import useOpenPricingModal from 'components/common/hooks/useOpenPricingModal';
+import useCanSelfHostedExpand from 'components/common/hooks/useCanSelfHostedExpand';
+import {getExpandSeatsLink} from 'selectors/cloud';
+import useControlSelfHostedExpansionModal from 'components/common/hooks/useControlSelfHostedExpansionModal';
+
+const DAYS_UNTIL_EXPIRY_WARNING_DISPLAY_THRESHOLD = 30;
+const DAYS_UNTIL_EXPIRY_DANGER_DISPLAY_THRESHOLD = 5;
 
 export interface EnterpriseEditionProps {
     openEELicenseModal: () => void;
@@ -47,10 +55,12 @@ const EnterpriseEditionLeftPanel = ({
     const {formatMessage} = useIntl();
     const [unsanitizedLicense, setUnsanitizedLicense] = useState(license);
     const openPricingModal = useOpenPricingModal();
+    const canExpand = useCanSelfHostedExpand();
+    const selfHostedExpansionModal = useControlSelfHostedExpansionModal({trackingLocation: 'license_settings_add_seats'});
+    const expandableLink = useSelector(getExpandSeatsLink);
 
     useEffect(() => {
         async function fetchUnSanitizedLicense() {
-            // This solves this the issue reported here: https://mattermost.atlassian.net/browse/MM-42906
             try {
                 const unsanitizedL = await Client4.getClientLicenseOld();
                 setUnsanitizedLicense(unsanitizedL);
@@ -63,6 +73,7 @@ const EnterpriseEditionLeftPanel = ({
 
     const skuName = getSkuDisplayName(unsanitizedLicense.SkuShortName, unsanitizedLicense.IsGovSku === 'true');
     const expirationDays = getRemainingDaysFromFutureTimestamp(parseInt(unsanitizedLicense.ExpiresAt, 10));
+    const isSelfHostedExpansionEnabled = useSelector(getConfig)?.ServiceSettings?.SelfHostedExpansion;
 
     const viewPlansButton = (
         <button
@@ -77,6 +88,14 @@ const EnterpriseEditionLeftPanel = ({
         </button>
     );
 
+    const handleClickAddSeats = () => {
+        if (!isSelfHostedExpansionEnabled && !canExpand) {
+            window.open(expandableLink(unsanitizedLicense.Id), '_blank');
+        } else {
+            selfHostedExpansionModal.open();
+        }
+    };
+
     return (
         <div
             className='EnterpriseEditionLeftPanel'
@@ -117,10 +136,16 @@ const EnterpriseEditionLeftPanel = ({
             <div className='licenseInformation'>
                 <div className='license-details-top'>
                     <span className='title'>{'License details'}</span>
-                    {(expirationDays <= 30) &&
-                        <span className='expiration-days'>
-                            {`Expires in ${expirationDays} day${expirationDays > 1 ? 's' : ''}`}
-                        </span>
+                    {canExpand &&
+                        <button
+                            className='add-seats-button btn btn-primary'
+                            onClick={handleClickAddSeats}
+                        >
+                            <FormattedMessage
+                                id={'admin.license.enterpriseEdition.add.seats'}
+                                defaultMessage='+ Add seats'
+                            />
+                        </button>
                     }
                 </div>
                 {
@@ -134,6 +159,7 @@ const EnterpriseEditionLeftPanel = ({
                         fileInputRef,
                         handleChange,
                         statsActiveUsers,
+                        expirationDays,
                     )
                 }
             </div>
@@ -162,7 +188,7 @@ const EnterpriseEditionLeftPanel = ({
 
 type LegendValues = 'START DATE:' | 'EXPIRES:' | 'USERS:' | 'ACTIVE USERS:' | 'EDITION:' | 'LICENSE ISSUED:' | 'NAME:' | 'COMPANY / ORG:'
 
-const renderLicenseValues = (activeUsers: number, seatsPurchased: number) => ({legend, value}: {legend: LegendValues; value: string | JSX.Element | null}, index: number): React.ReactNode => {
+const renderLicenseValues = (activeUsers: number, seatsPurchased: number, expirationDays: number) => ({legend, value}: {legend: LegendValues; value: string | JSX.Element | null}, index: number): React.ReactNode => {
     if (legend === 'ACTIVE USERS:') {
         const {isBetween5PercerntAnd10PercentPurchasedSeats, isOver10PercerntPurchasedSeats} = calculateOverageUserActivated({activeUsers, seatsPurchased});
         return (
@@ -186,6 +212,26 @@ const renderLicenseValues = (activeUsers: number, seatsPurchased: number) => ({l
                 >{value}</span>
             </div>
         );
+    } else if (legend === 'EXPIRES:') {
+        return (
+            <div
+                className='item-element'
+                key={value + index.toString()}
+            >
+                <span className='legend'>{legend}</span>
+                <span className='value'>{value}</span>
+                {(expirationDays <= DAYS_UNTIL_EXPIRY_WARNING_DISPLAY_THRESHOLD) &&
+                <span
+                    className={classNames('expiration-days', {
+                        'expiration-days-warning': expirationDays <= DAYS_UNTIL_EXPIRY_WARNING_DISPLAY_THRESHOLD,
+                        'expiration-days-danger': expirationDays <= DAYS_UNTIL_EXPIRY_DANGER_DISPLAY_THRESHOLD,
+                    })}
+                >
+                    {`Expires in ${expirationDays} day${expirationDays > 1 ? 's' : ''}`}
+                </span>
+                }
+            </div>
+        );
     }
 
     return (
@@ -209,6 +255,7 @@ const renderLicenseContent = (
     fileInputRef: RefObject<HTMLInputElement>,
     handleChange: () => void,
     statsActiveUsers: number,
+    expirationDays: number,
 ) => {
     // Note: DO NOT LOCALISE THESE STRINGS. Legally we can not since the license is in English.
 
@@ -246,7 +293,7 @@ const renderLicenseContent = (
 
     return (
         <div className='licenseElements'>
-            {licenseValues.map(renderLicenseValues(statsActiveUsers, parseInt(license.Users, 10)))}
+            {licenseValues.map(renderLicenseValues(statsActiveUsers, parseInt(license.Users, 10), expirationDays))}
             <hr/>
             {renderAddNewLicenseButton(fileInputRef, handleChange)}
             {renderRemoveButton(handleRemove, isDisabled, removing)}

webapp/channels/src/components/common/hooks/useCanSelfHostedExpand.ts

@@ -0,0 +1,46 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+import {useEffect, useState} from 'react';
+import {useSelector} from 'react-redux';
+
+import {Client4} from 'mattermost-redux/client';
+import {getConfig, getLicense} from 'mattermost-redux/selectors/entities/general';
+import {getSubscriptionProduct} from 'mattermost-redux/selectors/entities/cloud';
+import {BillingSchemes, SelfHostedProducts} from 'utils/constants';
+
+import {isCloudLicense} from 'utils/license_utils';
+
+import {findSelfHostedProductBySku} from 'utils/hosted_customer';
+
+import useGetSelfHostedProducts from './useGetSelfHostedProducts';
+
+export default function useCanSelfHostedExpand() {
+    // NOTE: This is a basic implementation to get things up and running, more details to come later.
+    const [expansionAvailable, setExpansionAvailable] = useState(false);
+    const config = useSelector(getConfig);
+    const isEnterpriseReady = config.BuildEnterpriseReady === 'true';
+    const isSalesServeOnly = useSelector(getSubscriptionProduct)?.billing_scheme === BillingSchemes.SALES_SERVE;
+    const license = useSelector(getLicense);
+    const isCloud = isCloudLicense(license);
+    const [products] = useGetSelfHostedProducts();
+    const currentProduct = findSelfHostedProductBySku(products, license.SkuShortName);
+
+    // Self Hosted Products never contains a product for starter, additional check is done out of caution.
+    const isSelfHostedStarter = currentProduct === null || currentProduct?.sku === SelfHostedProducts.STARTER;
+
+    useEffect(() => {
+        if (!isEnterpriseReady) {
+            return;
+        }
+        Client4.getLicenseSelfServeStatus().
+            then((res) => {
+                setExpansionAvailable(res.is_expandable ?? false);
+            }).
+            catch(() => {
+                setExpansionAvailable(false);
+            });
+    }, [isEnterpriseReady]);
+
+    return !isCloud && !isSelfHostedStarter && !isSalesServeOnly && expansionAvailable;
+}

webapp/channels/src/components/common/hooks/useControlSelfHostedExpansionModal.ts

@@ -0,0 +1,93 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+import {useMemo} from 'react';
+import {useDispatch, useSelector} from 'react-redux';
+
+import {trackEvent} from 'actions/telemetry_actions';
+import {openModal} from 'actions/views/modals';
+import {ModalIdentifiers, TELEMETRY_CATEGORIES} from 'utils/constants';
+import PurchaseInProgressModal from 'components/purchase_in_progress_modal';
+import {Client4} from 'mattermost-redux/client';
+import {getCurrentUser} from 'mattermost-redux/selectors/entities/common';
+import {HostedCustomerTypes} from 'mattermost-redux/action_types';
+
+import {STORAGE_KEY_EXPANSION_IN_PROGRESS} from 'components/self_hosted_expansion_modal/constants';
+import SelfHostedExpansionModal from 'components/self_hosted_expansion_modal';
+
+import {useControlModal, ControlModal} from './useControlModal';
+
+interface HookOptions{
+    onClick?: () => void;
+    trackingLocation: string;
+}
+
+export default function useControlSelfHostedExpansionModal(options: HookOptions): ControlModal {
+    const dispatch = useDispatch();
+    const currentUser = useSelector(getCurrentUser);
+    const controlModal = useControlModal({
+        modalId: ModalIdentifiers.SELF_HOSTED_EXPANSION,
+        dialogType: SelfHostedExpansionModal,
+    });
+
+    return useMemo(() => {
+        return {
+            ...controlModal,
+            open: async () => {
+                const purchaseInProgress = localStorage.getItem(STORAGE_KEY_EXPANSION_IN_PROGRESS) === 'true';
+
+                // check if user already has an open purchase modal in current browser.
+                if (purchaseInProgress) {
+                    // User within the same browser session
+                    // is already trying to purchase. Notify them of this
+                    // and request the exit that purchase flow before attempting again.
+                    dispatch(openModal({
+                        modalId: ModalIdentifiers.PURCHASE_IN_PROGRESS,
+                        dialogType: PurchaseInProgressModal,
+                        dialogProps: {
+                            purchaserEmail: currentUser.email,
+                            storageKey: STORAGE_KEY_EXPANSION_IN_PROGRESS,
+                        },
+                    }));
+                    return;
+                }
+
+                trackEvent(TELEMETRY_CATEGORIES.SELF_HOSTED_EXPANSION, 'click_open_expansion_modal', {
+                    callerInfo: options.trackingLocation,
+                });
+
+                if (options.onClick) {
+                    options.onClick();
+                }
+
+                try {
+                    const result = await Client4.bootstrapSelfHostedSignup();
+
+                    if (result.email !== currentUser.email) {
+                        // Token already exists and was created by another admin.
+                        // Notify user of this and do not allow them to try to expand concurrently.
+                        dispatch(openModal({
+                            modalId: ModalIdentifiers.EXPANSION_IN_PROGRESS,
+                            dialogType: PurchaseInProgressModal,
+                            dialogProps: {
+                                purchaserEmail: result.email,
+                                storageKey: STORAGE_KEY_EXPANSION_IN_PROGRESS,
+                            },
+                        }));
+                        return;
+                    }
+
+                    dispatch({
+                        type: HostedCustomerTypes.RECEIVED_SELF_HOSTED_SIGNUP_PROGRESS,
+                        data: result.progress,
+                    });
+
+                    controlModal.open();
+                } catch (e) {
+                    // eslint-disable-next-line no-console
+                    console.error('error bootstrapping self hosted purchase modal', e);
+                }
+            },
+        };
+    }, [controlModal, options.onClick, options.trackingLocation]);
+}

webapp/channels/src/components/common/hooks/useControlSelfHostedPurchaseModal.ts

@@ -63,6 +63,7 @@ export default function useControlSelfHostedPurchaseModal(options: HookOptions):
                         dialogType: PurchaseInProgressModal,
                         dialogProps: {
                             purchaserEmail: currentUser.email,
+                            storageKey: STORAGE_KEY_PURCHASE_IN_PROGRESS,
                         },
                     }));
                     return;
@@ -86,6 +87,7 @@ export default function useControlSelfHostedPurchaseModal(options: HookOptions):
                             dialogType: PurchaseInProgressModal,
                             dialogProps: {
                                 purchaserEmail: result.email,
+                                storageKey: STORAGE_KEY_PURCHASE_IN_PROGRESS,
                             },
                         }));
                         return;

webapp/channels/src/components/purchase_in_progress_modal/index.test.tsx

@@ -11,6 +11,8 @@ import {GlobalState} from 'types/store';
 import {TestHelper as TH} from 'utils/test_helper';
 import {Client4} from 'mattermost-redux/client';
 
+import {STORAGE_KEY_PURCHASE_IN_PROGRESS} from 'components/self_hosted_purchase_modal/constants';
+
 import PurchaseInProgressModal from './';
 
 jest.mock('mattermost-redux/client', () => {
@@ -56,13 +58,27 @@ describe('PurchaseInProgressModal', () => {
     it('when purchaser and user emails are different, user is instructed to wait', () => {
         const stateOverride: DeepPartial<GlobalState> = JSON.parse(JSON.stringify(initialState));
         stateOverride.entities!.users!.currentUserId = 'otherUserId';
-        renderWithIntlAndStore(<div id='root-portal'><PurchaseInProgressModal purchaserEmail={'admin@example.com'}/></div>, stateOverride);
+        renderWithIntlAndStore(
+            <div id='root-portal'>
+                <PurchaseInProgressModal
+                    purchaserEmail={'admin@example.com'}
+                    storageKey={STORAGE_KEY_PURCHASE_IN_PROGRESS}
+                />
+            </div>, stateOverride,
+        );
 
         screen.getByText('@UserAdmin is currently attempting to purchase a paid license.');
     });
 
     it('when purchaser and user emails are same, allows user to reset purchase flow', () => {
-        renderWithIntlAndStore(<div id='root-portal'><PurchaseInProgressModal purchaserEmail={'admin@example.com'}/></div>, initialState);
+        renderWithIntlAndStore(
+            <div id='root-portal'>
+                <PurchaseInProgressModal
+                    purchaserEmail={'admin@example.com'}
+                    storageKey={STORAGE_KEY_PURCHASE_IN_PROGRESS}
+                />
+            </div>, initialState,
+        );
 
         expect(Client4.bootstrapSelfHostedSignup).not.toHaveBeenCalled();
         screen.getByText('Reset purchase flow').click();

webapp/channels/src/components/purchase_in_progress_modal/index.tsx

@@ -13,13 +13,13 @@ import {Client4} from 'mattermost-redux/client';
 
 import CreditCardSvg from 'components/common/svg_images_components/credit_card_svg';
 import {useControlPurchaseInProgressModal} from 'components/common/hooks/useControlModal';
-import {STORAGE_KEY_PURCHASE_IN_PROGRESS} from 'components/self_hosted_purchase_modal/constants';
 
 import './index.scss';
 import {GlobalState} from '@mattermost/types/store';
 
 interface Props {
     purchaserEmail: string;
+    storageKey: string;
 }
 
 export default function PurchaseInProgressModal(props: Props) {
@@ -64,7 +64,7 @@ export default function PurchaseInProgressModal(props: Props) {
         );
 
         genericModalProps.handleConfirm = () => {
-            localStorage.removeItem(STORAGE_KEY_PURCHASE_IN_PROGRESS);
+            localStorage.removeItem(props.storageKey);
             Client4.bootstrapSelfHostedSignup(true);
             close();
         };

webapp/channels/src/components/self_hosted_expansion_modal/constants.tsx

@@ -0,0 +1,4 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+export const STORAGE_KEY_EXPANSION_IN_PROGRESS = 'EXPANSION_IN_PROGRESS';

webapp/channels/src/components/self_hosted_expansion_modal/error_page.scss

@@ -0,0 +1,3 @@
+.self_hosted_expansion_failed {
+    margin-top: 163px;
+}

webapp/channels/src/components/self_hosted_expansion_modal/error_page.tsx

@@ -0,0 +1,70 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+import React from 'react';
+
+import {FormattedMessage} from 'react-intl';
+import {useSelector} from 'react-redux';
+
+import {getCloudContactUsLink, InquiryType} from 'selectors/cloud';
+
+import PaymentFailedSvg from 'components/common/svg_images_components/payment_failed_svg';
+import IconMessage from 'components/purchase_modal/icon_message';
+
+import './error_page.scss';
+
+export default function SelfHostedExpansionErrorPage() {
+    const contactSupportLink = useSelector(getCloudContactUsLink)(InquiryType.Technical);
+
+    const formattedTitle = (
+        <FormattedMessage
+            id='admin.billing.subscription.paymentVerificationFailed'
+            defaultMessage='Sorry, the payment verification failed'
+        />
+    );
+
+    const formattedButtonText = (
+        <FormattedMessage
+            id='error_modal.try_again'
+            defaultMessage='Try again'
+        />
+    );
+
+    const formattedSubtitle = (
+        <FormattedMessage
+            id='self_hosted_expansion.paymentFailed'
+            defaultMessage='Payment failed. Please try again or contact support.'
+        />
+    );
+
+    const tertiaryButtonText = (
+        <FormattedMessage
+            id='self_hosted_expansion.contact_support'
+            defaultMessage={'Contact Support'}
+        />
+    );
+
+    const icon = (
+        <PaymentFailedSvg
+            width={444}
+            height={313}
+        />
+    );
+
+    return (
+        <div className='self_hosted_expansion_failed'>
+            <IconMessage
+                formattedTitle={formattedTitle}
+                formattedSubtitle={formattedSubtitle}
+                icon={icon}
+                error={true}
+                formattedButtonText={formattedButtonText}
+                buttonHandler={() => {
+                    //TODO: Open self hosted expansion modal
+                }}
+                formattedTertiaryButonText={tertiaryButtonText}
+                tertiaryButtonHandler={() => window.open(contactSupportLink, '_blank', 'noreferrer')}
+            />
+        </div>
+    );
+}

webapp/channels/src/components/self_hosted_expansion_modal/expansion_card.scss

@@ -0,0 +1,140 @@
+.SelfHostedExpansionRHSCard {
+    display: flex;
+    max-width: 280px;
+    flex-direction: column;
+
+    &__Content {
+        padding: 24px;
+        border: 1px solid;
+        border-color: rgba(var(--sys-denim-center-channel-text-rgb), 0.16);
+        border-radius: 4px;
+    }
+
+    &__RHSCardTitle {
+        display: block;
+        margin-bottom: 12px;
+        color: rgba(var(--sys-denim-center-channel-text-rgb), 0.72);
+        font-family: 'Open Sans';
+        font-size: 14px;
+        font-weight: 600;
+        text-align: center;
+        text-transform: capitalize;
+    }
+
+    .seatsInput {
+        width: 73px;
+        margin-left: auto;
+        font-family: 'Open Sans';
+        font-size: 14px;
+        font-weight: 400;
+
+        input[type="number"] {
+            text-align: right;
+        }
+
+        input[type="number"]::-webkit-inner-spin-button,
+        input[type="number"]::-webkit-outer-spin-button {
+            margin: 0;
+            -webkit-appearance: none;
+        }
+    }
+
+    &__PlanDetails {
+        display: flex;
+        flex-direction: column;
+        text-align: center;
+
+        .planName {
+            color: rgba(var(--sys-denim-center-channel-text-rgb), 0.72);
+            font-family: 'Metropolis';
+            font-size: 20px;
+            font-weight: 400;
+            text-transform: capitalize;
+        }
+
+        .usage {
+            color: rgba(var(--sys-denim-center-channel-text-rgb), 0.56);
+            font-family: 'Open Sans';
+            font-size: 12px;
+            font-weight: 600;
+
+            :first-child {
+                text-transform: uppercase;
+            }
+        }
+    }
+
+    hr {
+        width: 90%;
+        height: 2px;
+        background-color: rgba(var(--sys-denim-center-channel-text-rgb), 0.16);
+    }
+
+    &__seatInput,
+    &__cost_breakdown {
+        display: grid;
+        font-weight: 400;
+        gap: 10px;
+        grid-template-columns: repeat(2, 1fr);
+
+        .costPerUser > span:first-child {
+            font-family: 'Open Sans';
+            font-size: 14px;
+        }
+
+        .costPerUser > span:last-child {
+            color: rgba(var(--sys-denim-center-channel-text-rgb), 0.72);
+            font-family: 'Open Sans';
+            font-size: 12px;
+        }
+
+        .totalCost {
+            width: 141px;
+        }
+
+        .totalCost > span:first-child {
+            color: var(--sys-denim-center-channel-text);
+            font-family: 'Open Sans';
+            font-size: 14px;
+            font-weight: 700;
+        }
+
+        .totalCost > span:last-child {
+            color: rgba(var(--sys-denim-center-channel-text-rgb), 0.72);
+            font-family: 'Open Sans';
+            font-size: 12px;
+        }
+
+        .costAmount {
+            margin-right: 0;
+            margin-left: auto;
+            font-weight: 700;
+        }
+    }
+
+    &__AddSeatsWarning {
+        display: block;
+        width: 100%;
+        height: 35px;
+        margin-bottom: 15px;
+        color: var(--dnd-indicator);
+        font-family: 'Open Sans';
+        font-size: 12px;
+        font-weight: 600;
+        text-align: right;
+    }
+
+    &__CompletePurchaseButton {
+        width: 100%;
+        margin-top: 10px;
+        margin-bottom: 10px;
+        border-radius: 4px;
+    }
+
+    &__ChargedTodayDisclaimer {
+        color: rgba(var(--sys-denim-center-channel-text-rgb), 0.72);
+        font-family: 'Open Sans';
+        font-size: 12px;
+        font-weight: 400;
+    }
+}

webapp/channels/src/components/self_hosted_expansion_modal/expansion_card.tsx

@@ -0,0 +1,268 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+import {OutlinedInput} from '@mui/material';
+
+import moment from 'moment-timezone';
+import React, {Fragment, useState} from 'react';
+import {FormattedMessage} from 'react-intl';
+import {useSelector} from 'react-redux';
+
+import {getLicense} from 'mattermost-redux/selectors/entities/general';
+import {DocLinks, RecurringIntervals} from 'utils/constants';
+import WarningIcon from 'components/widgets/icons/fa_warning_icon';
+
+import './expansion_card.scss';
+import useGetSelfHostedProducts from 'components/common/hooks/useGetSelfHostedProducts';
+import {findSelfHostedProductBySku} from 'utils/hosted_customer';
+import ExternalLink from 'components/external_link';
+
+const MONTHS_IN_YEAR = 12;
+const MILLISECONDS_PER_DAY = 24 * 60 * 60 * 1000;
+const MAX_TRANSACTION_VALUE = 1_000_000 - 1;
+
+interface Props {
+    canSubmit: boolean;
+    licensedSeats: number;
+    initialSeats: number;
+    submit: () => void;
+    updateSeats: (seats: number) => void;
+}
+
+export default function SelfHostedExpansionCard(props: Props) {
+    const license = useSelector(getLicense);
+    const startsAt = moment(parseInt(license.StartsAt, 10)).format('MMM. D, YYYY');
+    const endsAt = moment(parseInt(license.ExpiresAt, 10)).format('MMM. D, YYYY');
+    const [additionalSeats, setAdditionalSeats] = useState(props.initialSeats);
+    const [overMaxSeats, setOverMaxSeats] = useState(false);
+    const licenseExpiry = parseInt(license.ExpiresAt, 10);
+    const invalidAdditionalSeats = additionalSeats === 0 || isNaN(additionalSeats);
+    const [products] = useGetSelfHostedProducts();
+    const currentProduct = findSelfHostedProductBySku(products, license.SkuShortName);
+
+    const getMonthsUntilExpiry = () => {
+        const now = new Date();
+        return Math.ceil((licenseExpiry - now.getTime()) / MILLISECONDS_PER_DAY / 30);
+    };
+
+    const getMonthlyPrice = () => {
+        if (currentProduct === null) {
+            return 0;
+        }
+
+        if (currentProduct?.recurring_interval === RecurringIntervals.MONTH) {
+            return currentProduct.price_per_seat;
+        }
+
+        const costPerMonth = (currentProduct.price_per_seat / MONTHS_IN_YEAR);
+
+        // Only display 2 decimal places if the cost per month is not evenly divisible over 12 months.
+        if (!Number.isInteger(costPerMonth)) {
+            // Keep the return value as a number.
+            return costPerMonth;
+        }
+
+        return costPerMonth;
+    };
+
+    const getCostPerUser = () => {
+        if (isNaN(additionalSeats)) {
+            return 0;
+        }
+        const monthlyPrice = getMonthlyPrice();
+        const monthsUntilExpiry = getMonthsUntilExpiry();
+        return monthlyPrice * monthsUntilExpiry;
+    };
+
+    const getTotal = () => {
+        if (isNaN(additionalSeats)) {
+            return 0;
+        }
+        const monthlyPrice = getMonthlyPrice();
+        const monthsUntilExpiry = getMonthsUntilExpiry();
+        return additionalSeats * monthlyPrice * monthsUntilExpiry;
+    };
+
+    // Finds the maximum number of additional seats that is possible, taking into account
+    // the stripe transaction limit. The maximum number of seats will follow the formula:
+    // (StripeTransaction Limit - (Current_Seats * Price Per Seat)) / price_per_seat
+    const getMaximumAdditionalSeats = () => {
+        if (currentProduct === null) {
+            return 0;
+        }
+
+        let recurringCost = 0;
+
+        // if monthly
+        if (currentProduct.recurring_interval === RecurringIntervals.MONTH) {
+            recurringCost = getMonthlyPrice();
+        } else { // if yearly
+            recurringCost = currentProduct.price_per_seat;
+        }
+
+        const currentPaymentPrice = recurringCost * props.licensedSeats;
+        const remainingTransactionLimit = MAX_TRANSACTION_VALUE - currentPaymentPrice;
+        const remainingSeats = Math.floor(remainingTransactionLimit / recurringCost);
+        return Math.max(0, remainingSeats);
+    };
+
+    const maxAdditionalSeats = getMaximumAdditionalSeats();
+
+    const handleNewSeatsInputChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+        setOverMaxSeats(false);
+
+        const requestedSeats = parseInt(e.target.value, 10);
+
+        const overMaxAdditionalSeats = requestedSeats > maxAdditionalSeats;
+        setOverMaxSeats(overMaxAdditionalSeats);
+
+        const finalSeatCount = overMaxAdditionalSeats ? maxAdditionalSeats : requestedSeats;
+        setAdditionalSeats(finalSeatCount);
+
+        props.updateSeats(finalSeatCount);
+    };
+
+    return (
+        <div className='SelfHostedExpansionRHSCard'>
+            <div className='SelfHostedExpansionRHSCard__RHSCardTitle'>
+                <FormattedMessage
+                    id='self_hosted_expansion_rhs_license_summary_title'
+                    defaultMessage='License Summary'
+                />
+            </div>
+            <div className='SelfHostedExpansionRHSCard__Content'>
+                <div className='SelfHostedExpansionRHSCard__PlanDetails'>
+                    <span className='planName'>{license.SkuShortName}</span>
+                    <div className='usage'>
+                        <FormattedMessage
+                            id='self_hosted_expansion_rhs_card_license_date'
+                            defaultMessage='{startsAt} - {endsAt}'
+                            values={{
+                                startsAt,
+                                endsAt,
+                            }}
+                        />
+                        <br/>
+                        <FormattedMessage
+                            id='self_hosted_expansion_rhs_card_licensed_seats'
+                            defaultMessage='{licensedSeats} LICENSES SEATS'
+                            values={{
+                                licensedSeats: props.licensedSeats,
+                            }}
+                        />
+                    </div>
+                </div>
+                <hr/>
+                <div className='SelfHostedExpansionRHSCard__seatInput'>
+                    <FormattedMessage
+                        id='self_hosted_expansion_rhs_card_add_new_seats'
+                        defaultMessage='Add new seats'
+                    />
+                    <OutlinedInput
+                        data-testid='seatsInput'
+                        className='seatsInput'
+                        size='small'
+                        type='number'
+                        value={additionalSeats}
+                        onChange={handleNewSeatsInputChange}
+                        error={invalidAdditionalSeats}
+                        disabled={maxAdditionalSeats === 0}
+                    />
+                </div>
+                <div className='SelfHostedExpansionRHSCard__AddSeatsWarning'>
+                    {invalidAdditionalSeats && !overMaxSeats &&
+                        <FormattedMessage
+                            id='self_hosted_expansion_rhs_card_must_add_seats_warning'
+                            defaultMessage='{warningIcon} You must add a seat to continue'
+                            values={{
+                                warningIcon: <WarningIcon additionalClassName={'SelfHostedExpansionRHSCard__warning'}/>,
+                            }}
+                        />
+                    }
+                    {overMaxSeats && maxAdditionalSeats > 0 &&
+                        <FormattedMessage
+                            id='self_hosted_expansion_rhs_card_maximum_seats_warning'
+                            defaultMessage='{warningIcon} You may only expand by an additional {maxAdditionalSeats} seats'
+                            values={{
+                                maxAdditionalSeats,
+                                warningIcon: <WarningIcon additionalClassName={'SelfHostedExpansionRHSCard__warning'}/>,
+                            }}
+                        />
+                    }
+                    {maxAdditionalSeats === 0 &&
+                        <FormattedMessage
+                            id='self_hosted_expansion_rhs_card_additional_seats_limit_warning'
+                            defaultMessage='{warningIcon} Transaction amount limit reached.{break}Please contact sales'
+                            values={{
+                                break: <br/>,
+                                warningIcon: <WarningIcon additionalClassName={'SelfHostedExpansionRHSCard__warning'}/>,
+                            }}
+                        />
+                    }
+                </div>
+                <div className='SelfHostedExpansionRHSCard__cost_breakdown'>
+                    <div className='costPerUser'>
+                        <FormattedMessage
+                            id='self_hosted_expansion_rhs_card_cost_per_user_title'
+                            defaultMessage='Cost per user'
+                        />
+                        <br/>
+                        <FormattedMessage
+                            id='self_hosted_expansion_rhs_card_cost_per_user_breakdown'
+                            defaultMessage='{costPerUser} x {monthsUntilExpiry} months'
+                            values={{
+                                costPerUser: getMonthlyPrice().toFixed(2),
+                                monthsUntilExpiry: getMonthsUntilExpiry(),
+                            }}
+                        />
+                    </div>
+                    <div className='costAmount'>
+                        <span>{'$' + getCostPerUser().toFixed(2)}</span>
+                    </div>
+                    <div className='totalCost'>
+                        <FormattedMessage
+                            id='self_hosted_expansion_rhs_card_total_title'
+                            defaultMessage='Total'
+                        />
+                        <br/>
+                        <FormattedMessage
+                            id='self_hosted_expansion_rhs_card_total_prorated_warning'
+                            defaultMessage='The total will be prorated'
+                        />
+                    </div>
+                    <span className='costAmount'>
+                        <span>{'$' + getTotal().toFixed(2)}</span>
+                    </span>
+                </div>
+                <button
+                    className='btn btn-primary SelfHostedExpansionRHSCard__CompletePurchaseButton'
+                    disabled={!props.canSubmit || maxAdditionalSeats === 0}
+                    onClick={props.submit}
+                >
+                    <FormattedMessage
+                        id='self_hosted_expansion_rhs_complete_button'
+                        defaultMessage='Complete purchase'
+                    />
+                </button>
+                <div className='SelfHostedExpansionRHSCard__ChargedTodayDisclaimer'>
+                    <FormattedMessage
+                        id='self_hosted_expansion_rhs_credit_card_charge_today_warning'
+                        defaultMessage='Your credit card will be charged today.<see_how_billing_works>See how billing works.</see_how_billing_works>'
+                        values={{
+                            see_how_billing_works: (text: string) => (
+                                <Fragment>
+                                    <br/>
+                                    <ExternalLink
+                                        href={DocLinks.SELF_HOSTED_BILLING}
+                                    >
+                                        {text}
+                                    </ExternalLink>
+                                </Fragment>
+                            ),
+                        }}
+                    />
+                </div>
+            </div>
+        </div>
+    );
+}

webapp/channels/src/components/self_hosted_expansion_modal/index.test.tsx

@@ -0,0 +1,418 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+import React from 'react';
+
+import {screen, fireEvent} from '@testing-library/react';
+
+import {GlobalState} from 'types/store';
+
+import {SelfHostedSignupForm, SelfHostedSignupProgress} from '@mattermost/types/hosted_customer';
+
+import {renderWithIntlAndStore} from 'tests/react_testing_utils';
+import {TestHelper as TH} from 'utils/test_helper';
+import {SelfHostedProducts, ModalIdentifiers} from 'utils/constants';
+
+import {DeepPartial} from '@mattermost/types/utilities';
+
+import SelfHostedExpansionModal, {makeInitialState, canSubmit, FormState} from './';
+
+interface MockCardInputProps {
+    onCardInputChange: (event: {complete: boolean}) => void;
+    forwardedRef: React.MutableRefObject<any>;
+}
+
+// number borrowed from stripe
+const successCardNumber = '4242424242424242';
+function MockCardInput(props: MockCardInputProps) {
+    props.forwardedRef.current = {
+        getCard: () => ({}),
+    };
+    return (
+        <input
+            placeholder='Card number'
+            type='text'
+            onChange={(e: React.ChangeEvent<HTMLInputElement>) => {
+                if (e.target.value === successCardNumber) {
+                    props.onCardInputChange({complete: true});
+                }
+            }}
+        />
+    );
+}
+
+jest.mock('components/payment_form/card_input', () => {
+    const original = jest.requireActual('components/payment_form/card_input');
+    return {
+        ...original,
+        __esModule: true,
+        default: MockCardInput,
+    };
+});
+
+jest.mock('components/self_hosted_purchase_modal/stripe_provider', () => {
+    return function(props: {children: React.ReactNode | React.ReactNodeArray}) {
+        return props.children;
+    };
+});
+
+jest.mock('components/common/hooks/useLoadStripe', () => {
+    return function() {
+        return {current: {
+            stripe: {},
+
+        }};
+    };
+});
+
+const mockCreatedIntent = SelfHostedSignupProgress.CREATED_INTENT;
+const mockCreatedLicense = SelfHostedSignupProgress.CREATED_LICENSE;
+const failOrg = 'failorg';
+
+const existingUsers = 10;
+
+const mockProfessionalProduct = TH.getProductMock({
+    id: 'prod_professional',
+    name: 'Professional',
+    sku: SelfHostedProducts.PROFESSIONAL,
+    price_per_seat: 7.5,
+});
+
+jest.mock('mattermost-redux/client', () => {
+    const original = jest.requireActual('mattermost-redux/client');
+    return {
+        __esModule: true,
+        ...original,
+        Client4: {
+            ...original.Client4,
+            pageVisited: jest.fn(),
+            setAcceptLanguage: jest.fn(),
+            trackEvent: jest.fn(),
+            createCustomerSelfHostedSignup: (form: SelfHostedSignupForm) => {
+                if (form.organization === failOrg) {
+                    throw new Error('error creating customer');
+                }
+                return Promise.resolve({
+                    progress: mockCreatedIntent,
+                });
+            },
+            confirmSelfHostedSignup: () => Promise.resolve({
+                progress: mockCreatedLicense,
+                license: {Users: existingUsers * 2},
+            }),
+            getClientLicenseOld: () => Promise.resolve({
+                data: {Sku: 'Enterprise'},
+            }),
+        },
+    };
+});
+
+jest.mock('components/payment_form/stripe', () => {
+    const original = jest.requireActual('components/payment_form/stripe');
+    return {
+        __esModule: true,
+        ...original,
+        getConfirmCardSetup: () => () => () => ({setupIntent: {status: 'succeeded'}, error: null}),
+    };
+});
+
+jest.mock('utils/hosted_customer', () => {
+    const original = jest.requireActual('utils/hosted_customer');
+    return {
+        __esModule: true,
+        ...original,
+        findSelfHostedProductBySku: () => {
+            return mockProfessionalProduct;
+        },
+    };
+});
+
+const productName = SelfHostedProducts.PROFESSIONAL;
+
+const initialState: DeepPartial<GlobalState> = {
+    views: {
+        modals: {
+            modalState: {
+                [ModalIdentifiers.SELF_HOSTED_EXPANSION]: {
+                    open: true,
+                },
+            },
+        },
+    },
+    storage: {
+        storage: {},
+    },
+    entities: {
+        admin: {
+            analytics: {
+                TOTAL_USERS: existingUsers,
+            },
+        },
+        teams: {
+            currentTeamId: '',
+        },
+        preferences: {
+            myPreferences: {
+                theme: {},
+            },
+        },
+        general: {
+            config: {
+                EnableDeveloper: 'false',
+            },
+            license: {
+                Sku: productName,
+                Users: '50',
+            },
+        },
+        cloud: {
+            subscription: {},
+        },
+        users: {
+            currentUserId: 'adminUserId',
+            profiles: {
+                adminUserId: TH.getUserMock({
+                    id: 'adminUserId',
+                    roles: 'admin',
+                    first_name: 'first',
+                    last_name: 'admin',
+                }),
+                otherUserId: TH.getUserMock({
+                    id: 'otherUserId',
+                    roles: '',
+                    first_name: '',
+                    last_name: '',
+                }),
+            },
+            filteredStats: {
+                total_users_count: 100,
+            },
+        },
+        hostedCustomer: {
+            products: {
+                productsLoaded: true,
+                products: {
+                    prod_professional: mockProfessionalProduct,
+                },
+            },
+            signupProgress: SelfHostedSignupProgress.START,
+        },
+    },
+};
+
+const valueEvent = (value: any) => ({target: {value}});
+function changeByPlaceholder(sel: string, val: any) {
+    fireEvent.change(screen.getByPlaceholderText(sel), valueEvent(val));
+}
+
+function selectDropdownValue(testId: string, value: string) {
+    fireEvent.change(screen.getByTestId(testId).querySelector('input') as any, valueEvent(value));
+    fireEvent.click(screen.getByTestId(testId).querySelector('.DropDown__option--is-focused') as any);
+}
+
+function changeByTestId(testId: string, value: string) {
+    fireEvent.change(screen.getByTestId(testId).querySelector('input') as any, valueEvent(value));
+}
+
+interface PurchaseForm {
+    card: string;
+    org: string;
+    name: string;
+    country: string;
+    address: string;
+    city: string;
+    state: string;
+    zip: string;
+    seats: string;
+}
+
+const defaultSuccessForm: PurchaseForm = {
+    card: successCardNumber,
+    org: 'My org',
+    name: 'The Cardholder',
+    country: 'United States of America',
+    address: '123 Main Street',
+    city: 'Minneapolis',
+    state: 'MN',
+    zip: '55423',
+    seats: '10',
+};
+
+function fillForm(form: PurchaseForm) {
+    changeByPlaceholder('Card number', form.card);
+    changeByPlaceholder('Organization Name', form.org);
+    changeByPlaceholder('Name on Card', form.name);
+    selectDropdownValue('selfHostedExpansionCountrySelector', form.country);
+    changeByPlaceholder('Address', form.address);
+    changeByPlaceholder('City', form.city);
+    selectDropdownValue('selfHostedExpansionStateSelector', form.state);
+    changeByPlaceholder('Zip/Postal Code', form.zip);
+    changeByTestId('seatsInput', form.seats);
+
+    expect(document.getElementsByClassName('SelfHostedExpansionRHSCard__AddSeatsWarning')[0] as HTMLElement).toBeEnabled();
+
+    // not changing the license seats number,
+    // because it is expected to be pre-filled with the correct number of seats.
+
+    const completeButton = screen.getByText('Complete purchase');
+
+    if (form === defaultSuccessForm) {
+        expect(completeButton).toBeEnabled();
+    }
+
+    return completeButton;
+}
+
+describe('SelfHostedExpansionModal', () => {
+    it('renders the form', () => {
+        renderWithIntlAndStore(<div id='root-portal'><SelfHostedExpansionModal/></div>, initialState);
+
+        screen.getByText('Provide your payment details');
+        screen.getByText('Add new seats');
+        screen.getByText('Contact Sales');
+        screen.getByText('Cost per user', {exact: false});
+
+        // screen.getByText(productName, {normalizer: (val) => {return val.charAt(0).toUpperCase() + val.slice(1)}});
+        screen.getByText('Your credit card will be charged today.');
+        screen.getByText('See how billing works', {exact: false});
+    });
+
+    it('filling the form enables expansion', () => {
+        renderWithIntlAndStore(<div id='root-portal'><SelfHostedExpansionModal/></div>, initialState);
+        expect(screen.getByText('Complete purchase')).toBeDisabled();
+        fillForm(defaultSuccessForm);
+    });
+
+    it('disables expansion if too few seats or no seats entered', () => {
+        renderWithIntlAndStore(<div id='root-portal'><SelfHostedExpansionModal/></div>, initialState);
+        fillForm(defaultSuccessForm);
+
+        // 0 seats entered.
+        const tooFewSeats = 0;
+        fireEvent.change(screen.getByTestId('seatsInput').querySelector('input') as HTMLElement, valueEvent(tooFewSeats.toString()));
+        expect(screen.getByText('Complete purchase')).toBeDisabled();
+        expect(screen.getByText('You must add a seat to continue')).toBeVisible();
+
+        // No seats value entered.
+        fireEvent.change(screen.getByTestId('seatsInput').querySelector('input') as HTMLElement, undefined);
+        expect(screen.getByText('Complete purchase')).toBeDisabled();
+        expect(screen.getByText('You must add a seat to continue')).toBeVisible();
+    });
+
+    // it('happy path submit shows success screen', async () => {
+    //     renderWithIntlAndStore(<div id='root-portal'><SelfHostedExpansionModal/></div>, initialState);
+    //     expect(screen.getByText('Complete purchase')).toBeDisabled();
+    //     const upgradeButton = fillForm(defaultSuccessForm);
+
+    //     upgradeButton.click();
+    //     await waitFor(() => expect(screen.getByText(`You're now subscribed to ${productName}`)).toBeTruthy(), {timeout: 1234});
+    // });
+
+    // it('sad path submit shows error screen', async () => {
+    //     renderWithIntlAndStore(<div id='root-portal'><SelfHostedExpansionModal/></div>, initialState);
+    //     expect(screen.getByText('Complete purchase')).toBeDisabled();
+    //     fillForm(defaultSuccessForm);
+    //     changeByPlaceholder('Organization Name', failOrg);
+
+    //     const upgradeButton = screen.getByText('Complete purchase');
+    //     expect(upgradeButton).toBeEnabled();
+    //     upgradeButton.click();
+    //     await waitFor(() => expect(screen.getByText('Sorry, the payment verification failed')).toBeTruthy(), {timeout: 1234});
+    // });
+});
+
+describe('SelfHostedExpansionModal :: canSubmit', () => {
+    function makeHappyPathState(): FormState {
+        return {
+            address: 'string',
+            address2: 'string',
+            city: 'string',
+            state: 'string',
+            country: 'string',
+            postalCode: '12345',
+            cardName: 'string',
+            organization: 'string',
+            cardFilled: true,
+            seats: 1,
+            submitting: false,
+            succeeded: false,
+            progressBar: 0,
+            error: '',
+        };
+    }
+    it('if submitting, can not submit again', () => {
+        const state = makeHappyPathState();
+        state.submitting = true;
+        expect(canSubmit(state, SelfHostedSignupProgress.CREATED_LICENSE)).toBe(false);
+    });
+
+    it('if created license, can submit', () => {
+        const state = makeInitialState(1);
+        state.submitting = false;
+        expect(canSubmit(state, SelfHostedSignupProgress.CREATED_LICENSE)).toBe(true);
+    });
+
+    it('if paid, can submit', () => {
+        const state = makeInitialState(1);
+        state.submitting = false;
+        expect(canSubmit(state, SelfHostedSignupProgress.PAID)).toBe(true);
+    });
+
+    // TODO: Needed?
+    it('if created subscription, can submit', () => {
+        const state = makeInitialState(1);
+        state.submitting = false;
+        expect(canSubmit(state, SelfHostedSignupProgress.CREATED_SUBSCRIPTION)).toBe(true);
+    });
+
+    it('if all details filled and card has not been confirmed, can submit', () => {
+        const state = makeHappyPathState();
+        expect(canSubmit(state, SelfHostedSignupProgress.START)).toBe(true);
+        expect(canSubmit(state, SelfHostedSignupProgress.CREATED_CUSTOMER)).toBe(true);
+        expect(canSubmit(state, SelfHostedSignupProgress.CREATED_INTENT)).toBe(true);
+    });
+
+    it('if card name missing and card has not been confirmed, can not submit', () => {
+        const state = makeHappyPathState();
+        state.cardName = '';
+        expect(canSubmit(state, SelfHostedSignupProgress.START)).toBe(false);
+        expect(canSubmit(state, SelfHostedSignupProgress.CREATED_CUSTOMER)).toBe(false);
+        expect(canSubmit(state, SelfHostedSignupProgress.CREATED_INTENT)).toBe(false);
+    });
+
+    it('if card number missing and card has not been confirmed, can not submit', () => {
+        const state = makeHappyPathState();
+        state.cardFilled = false;
+        expect(canSubmit(state, SelfHostedSignupProgress.START)).toBe(false);
+        expect(canSubmit(state, SelfHostedSignupProgress.CREATED_CUSTOMER)).toBe(false);
+        expect(canSubmit(state, SelfHostedSignupProgress.CREATED_INTENT)).toBe(false);
+    });
+
+    it('if address not filled and card has not been confirmed, can not submit', () => {
+        const state = makeHappyPathState();
+        state.address = '';
+        expect(canSubmit(state, SelfHostedSignupProgress.START)).toBe(false);
+        expect(canSubmit(state, SelfHostedSignupProgress.CREATED_CUSTOMER)).toBe(false);
+        expect(canSubmit(state, SelfHostedSignupProgress.CREATED_INTENT)).toBe(false);
+    });
+
+    it('if seats not valid and card has not been confirmed, can not submit', () => {
+        const state = makeHappyPathState();
+        state.seats = 0;
+        expect(canSubmit(state, SelfHostedSignupProgress.START)).toBe(false);
+        expect(canSubmit(state, SelfHostedSignupProgress.CREATED_CUSTOMER)).toBe(false);
+        expect(canSubmit(state, SelfHostedSignupProgress.CREATED_INTENT)).toBe(false);
+    });
+
+    it('if card confirmed, card not required for submission', () => {
+        const state = makeHappyPathState();
+        state.cardFilled = false;
+        state.cardName = '';
+        expect(canSubmit(state, SelfHostedSignupProgress.CONFIRMED_INTENT)).toBe(true);
+    });
+
+    it('if passed unknown progress status, can not submit', () => {
+        const state = makeHappyPathState();
+        expect(canSubmit(state, 'unknown status' as any)).toBe(false);
+    });
+});

webapp/channels/src/components/self_hosted_expansion_modal/index.tsx

@@ -0,0 +1,503 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+import React, {useEffect, useRef, useState} from 'react';
+
+import {useIntl} from 'react-intl';
+
+import {useDispatch, useSelector} from 'react-redux';
+
+import {StripeCardElementChangeEvent} from '@stripe/stripe-js';
+
+import UpgradeSvg from 'components/common/svg_images_components/upgrade_svg';
+import RootPortal from 'components/root_portal';
+import ContactSalesLink from 'components/self_hosted_purchase_modal/contact_sales_link';
+
+import useLoadStripe from 'components/common/hooks/useLoadStripe';
+import CardInput, {CardInputType} from 'components/payment_form/card_input';
+import FullScreenModal from 'components/widgets/modals/full_screen_modal';
+import Input from 'components/widgets/inputs/input/input';
+
+import BackgroundSvg from 'components/common/svg_images_components/background_svg';
+import {COUNTRIES} from 'utils/countries';
+import StateSelector from 'components/payment_form/state_selector';
+import {getTheme} from 'mattermost-redux/selectors/entities/preferences';
+import DropdownInput from 'components/dropdown_input';
+import StripeProvider from '../self_hosted_purchase_modal/stripe_provider';
+
+import {closeModal} from 'actions/views/modals';
+import {ModalIdentifiers, TELEMETRY_CATEGORIES} from 'utils/constants';
+import {getLicense} from 'mattermost-redux/selectors/entities/general';
+import {getCurrentUser, getFilteredUsersStats} from 'mattermost-redux/selectors/entities/users';
+import {pageVisited} from 'actions/telemetry_actions';
+
+import {Client4} from 'mattermost-redux/client';
+import {HostedCustomerTypes} from 'mattermost-redux/action_types';
+import {getSelfHostedSignupProgress} from 'mattermost-redux/selectors/entities/hosted_customer';
+import {inferNames} from 'utils/hosted_customer';
+import {SelfHostedSignupCustomerResponse, SelfHostedSignupProgress} from '@mattermost/types/hosted_customer';
+import {isDevModeEnabled} from 'selectors/general';
+import {getLicenseConfig} from 'mattermost-redux/actions/general';
+import {confirmSelfHostedExpansion} from 'actions/hosted_customer';
+import {DispatchFunc} from 'mattermost-redux/types/actions';
+import {ValueOf} from '@mattermost/types/utilities';
+
+import SelfHostedExpansionCard from './expansion_card';
+
+import './self_hosted_expansion_modal.scss';
+
+import {STORAGE_KEY_EXPANSION_IN_PROGRESS} from './constants';
+
+export interface FormState {
+    address: string;
+    address2: string;
+    city: string;
+    state: string;
+    country: string;
+    postalCode: string;
+    cardName: string;
+    organization: string;
+    cardFilled: boolean;
+    seats: number;
+    submitting: boolean;
+    succeeded: boolean;
+    progressBar: number;
+    error: string;
+}
+
+export function makeInitialState(seats: number): FormState {
+    return {
+        address: '',
+        address2: '',
+        city: '',
+        state: '',
+        country: '',
+        postalCode: '',
+        cardName: '',
+        organization: '',
+        cardFilled: false,
+        seats,
+        submitting: false,
+        succeeded: false,
+        progressBar: 0,
+        error: '',
+    };
+}
+
+export function canSubmit(formState: FormState, progress: ValueOf<typeof SelfHostedSignupProgress>) {
+    if (formState.submitting) {
+        return false;
+    }
+
+    const validAddress = Boolean(
+        formState.organization &&
+        formState.address &&
+        formState.city &&
+        formState.state &&
+        formState.postalCode &&
+        formState.country,
+    );
+    const validCard = Boolean(
+        formState.cardName &&
+        formState.cardFilled,
+    );
+    const validSeats = formState.seats > 0;
+
+    switch (progress) {
+    case SelfHostedSignupProgress.PAID:
+    case SelfHostedSignupProgress.CREATED_LICENSE:
+    case SelfHostedSignupProgress.CREATED_SUBSCRIPTION:
+        return true;
+    case SelfHostedSignupProgress.CONFIRMED_INTENT: {
+        return Boolean(
+            validAddress &&
+                validSeats,
+        );
+    }
+    case SelfHostedSignupProgress.START:
+    case SelfHostedSignupProgress.CREATED_CUSTOMER:
+    case SelfHostedSignupProgress.CREATED_INTENT:
+        return Boolean(
+            validCard &&
+                validAddress &&
+                validSeats,
+        );
+    default: {
+        return false;
+    }
+    }
+}
+
+export default function SelfHostedExpansionModal() {
+    const dispatch = useDispatch<DispatchFunc>();
+    const intl = useIntl();
+    const cardRef = useRef<CardInputType | null>(null);
+    const theme = useSelector(getTheme);
+    const progress = useSelector(getSelfHostedSignupProgress);
+    const user = useSelector(getCurrentUser);
+    const isDevMode = useSelector(isDevModeEnabled);
+
+    const license = useSelector(getLicense);
+    const licensedSeats = parseInt(license.Users, 10);
+    const activeUsers = useSelector(getFilteredUsersStats)?.total_users_count || 0;
+    const [additionalSeats, setAdditionalSeats] = useState(activeUsers <= licensedSeats ? 1 : activeUsers - licensedSeats);
+
+    const [stripeLoadHint, setStripeLoadHint] = useState(Math.random());
+    const stripeRef = useLoadStripe(stripeLoadHint);
+
+    const initialState = makeInitialState(additionalSeats);
+    const [formState, setFormState] = useState<FormState>(initialState);
+    const [show] = useState(true);
+
+    const title = intl.formatMessage({
+        id: 'self_hosted_expansion.expansion_modal.title',
+        defaultMessage: 'Provide your payment details',
+    });
+
+    const canSubmitForm = canSubmit(formState, progress);
+
+    const submit = async () => {
+        let submitProgress = progress;
+        let signupCustomerResult: SelfHostedSignupCustomerResponse | null = null;
+        try {
+            const [firstName, lastName] = inferNames(user, formState.cardName);
+
+            signupCustomerResult = await Client4.createCustomerSelfHostedSignup({
+                first_name: firstName,
+                last_name: lastName,
+                billing_address: {
+                    city: formState.city,
+                    country: formState.country,
+                    line1: formState.address,
+                    line2: formState.address2,
+                    postal_code: formState.postalCode,
+                    state: formState.state,
+                },
+                organization: formState.organization,
+            });
+        } catch {
+            setFormState({...formState, error: 'Failed to submit payment information'});
+            return;
+        }
+
+        if (signupCustomerResult === null) {
+            setStripeLoadHint(Math.random());
+            setFormState({...formState, submitting: false});
+            return;
+        }
+
+        if (progress === SelfHostedSignupProgress.START || progress === SelfHostedSignupProgress.CREATED_CUSTOMER) {
+            dispatch({
+                type: HostedCustomerTypes.RECEIVED_SELF_HOSTED_SIGNUP_PROGRESS,
+                data: signupCustomerResult.progress,
+            });
+            submitProgress = signupCustomerResult.progress;
+        }
+        if (stripeRef.current === null) {
+            setStripeLoadHint(Math.random());
+            setFormState({...formState, submitting: false});
+            return;
+        }
+
+        try {
+            const card = cardRef.current?.getCard();
+            if (!card) {
+                const message = 'Failed to get card when it was expected';
+                // eslint-disable-next-line no-console
+                console.error(message);
+                setFormState({...formState, error: message});
+                return;
+            }
+            const finished = await dispatch(confirmSelfHostedExpansion(
+                stripeRef.current,
+                {
+                    id: signupCustomerResult.setup_intent_id,
+                    client_secret: signupCustomerResult.setup_intent_secret,
+                },
+                isDevMode,
+                {
+                    address: formState.address,
+                    address2: formState.address2,
+                    city: formState.city,
+                    state: formState.state,
+                    country: formState.country,
+                    postalCode: formState.postalCode,
+                    name: formState.cardName,
+                    card,
+                },
+                submitProgress,
+                {
+                    seats: formState.seats,
+                },
+            ));
+
+            if (finished.data) {
+                setFormState({...formState, succeeded: true});
+
+                dispatch({
+                    type: HostedCustomerTypes.RECEIVED_SELF_HOSTED_SIGNUP_PROGRESS,
+                    data: SelfHostedSignupProgress.CREATED_LICENSE,
+                });
+
+                // Reload license in background.
+                // Needed if this was completed while on the Edition and License page.
+                dispatch(getLicenseConfig());
+            } else if (finished.error) {
+                let errorData = finished.error;
+                if (finished.error === 422) {
+                    errorData = finished.error.toString();
+                }
+                setFormState({...formState, error: errorData});
+                return;
+            }
+            setFormState({...formState, submitting: false});
+        } catch (e) {
+            // eslint-disable-next-line no-console
+            console.error('could not complete setup', e);
+            setFormState({...formState, error: 'unable to complete signup'});
+        }
+    };
+
+    useEffect(() => {
+        pageVisited(
+            TELEMETRY_CATEGORIES.SELF_HOSTED_EXPANSION,
+            'pageview_self_hosted_expansion',
+        );
+
+        localStorage.setItem(STORAGE_KEY_EXPANSION_IN_PROGRESS, 'true');
+        return () => {
+            localStorage.removeItem(STORAGE_KEY_EXPANSION_IN_PROGRESS);
+        };
+    }, []);
+
+    const resetToken = () => {
+        try {
+            Client4.bootstrapSelfHostedSignup(true).
+                then((data) => {
+                    dispatch({
+                        type: HostedCustomerTypes.RECEIVED_SELF_HOSTED_SIGNUP_PROGRESS,
+                        data: data.progress,
+                    });
+                });
+        } catch {
+            // swallow error ok here
+        }
+    };
+
+    return (
+        <StripeProvider
+            stripeRef={stripeRef}
+        >
+            <RootPortal>
+                <FullScreenModal
+                    show={show}
+                    ariaLabelledBy='self_hosted_expansion_modal_title'
+                    onClose={() => {
+                        dispatch(closeModal(ModalIdentifiers.SELF_HOSTED_EXPANSION));
+                        resetToken();
+                    }}
+                >
+                    <div className='SelfHostedExpansionModal'>
+                        <div className='form-view'>
+                            <div className='lhs'>
+                                <h2 className='title'>{title}</h2>
+                                <UpgradeSvg
+                                    width={267}
+                                    height={227}
+                                />
+                                <div className='footer-text'>{'Questions?'}</div>
+                                <ContactSalesLink/>
+                            </div>
+                            <div className='center'>
+                                <div
+                                    className='form'
+                                    data-testid='shpm-form'
+                                >
+                                    <span className='section-title'>
+                                        {intl.formatMessage({
+                                            id: 'payment_form.credit_card',
+                                            defaultMessage: 'Credit Card',
+                                        })}
+                                    </span>
+                                    <div className='form-row'>
+                                        <CardInput
+                                            forwardedRef={cardRef}
+                                            required={true}
+                                            onCardInputChange={(event: StripeCardElementChangeEvent) => {
+                                                setFormState({...formState, cardFilled: event.complete});
+                                            }}
+                                            theme={theme}
+                                        />
+                                    </div>
+                                    <div className='form-row'>
+                                        <Input
+                                            name='organization'
+                                            type='text'
+                                            value={formState.organization}
+                                            onChange={(e: React.ChangeEvent<HTMLInputElement>) => {
+                                                setFormState({...formState, organization: e.target.value});
+                                            }}
+                                            placeholder={intl.formatMessage({
+                                                id: 'self_hosted_signup.organization',
+                                                defaultMessage: 'Organization Name',
+                                            })}
+                                            required={true}
+                                        />
+                                    </div>
+                                    <div className='form-row'>
+                                        <Input
+                                            name='name'
+                                            type='text'
+                                            value={formState.cardName}
+                                            onChange={(e: React.ChangeEvent<HTMLInputElement>) => {
+                                                setFormState({...formState, cardName: e.target.value});
+                                            }}
+                                            placeholder={intl.formatMessage({
+                                                id: 'payment_form.name_on_card',
+                                                defaultMessage: 'Name on Card',
+                                            })}
+                                            required={true}
+                                        />
+                                    </div>
+                                    <span className='section-title'>
+                                        {intl.formatMessage({
+                                            id: 'payment_form.billing_address',
+                                            defaultMessage: 'Billing address',
+                                        })}
+                                    </span>
+                                    <DropdownInput
+                                        testId='selfHostedExpansionCountrySelector'
+                                        onChange={(option: {value: string}) => {
+                                            setFormState({...formState, country: option.value});
+                                        }}
+                                        value={
+                                            formState.country ? {value: formState.country, label: formState.country} : undefined
+                                        }
+                                        options={COUNTRIES.map((country) => ({
+                                            value: country.name,
+                                            label: country.name,
+                                        }))}
+                                        legend={intl.formatMessage({
+                                            id: 'payment_form.country',
+                                            defaultMessage: 'Country',
+                                        })}
+                                        placeholder={intl.formatMessage({
+                                            id: 'payment_form.country',
+                                            defaultMessage: 'Country',
+                                        })}
+                                        name={'billing_dropdown'}
+                                    />
+                                    <div className='form-row'>
+                                        <Input
+                                            name='address'
+                                            type='text'
+                                            value={formState.address}
+                                            onChange={(e: React.ChangeEvent<HTMLInputElement>) => {
+                                                setFormState({...formState, address: e.target.value});
+                                            }}
+                                            placeholder={intl.formatMessage({
+                                                id: 'payment_form.address',
+                                                defaultMessage: 'Address',
+                                            })}
+                                            required={true}
+                                        />
+                                    </div>
+                                    <div className='form-row'>
+                                        <Input
+                                            name='address2'
+                                            type='text'
+                                            value={formState.address2}
+                                            onChange={(e: React.ChangeEvent<HTMLInputElement>) => {
+                                                setFormState({...formState, address2: e.target.value});
+                                            }}
+                                            placeholder={intl.formatMessage({
+                                                id: 'payment_form.address_2',
+                                                defaultMessage: 'Address 2',
+                                            })}
+                                        />
+                                    </div>
+                                    <div className='form-row'>
+                                        <Input
+                                            name='city'
+                                            type='text'
+                                            value={formState.city}
+                                            onChange={(e: React.ChangeEvent<HTMLInputElement>) => {
+                                                setFormState({...formState, city: e.target.value});
+                                            }}
+                                            placeholder={intl.formatMessage({
+                                                id: 'payment_form.city',
+                                                defaultMessage: 'City',
+                                            })}
+                                            required={true}
+                                        />
+                                    </div>
+                                    <div className='form-row'>
+                                        <div className='form-row-third-1'>
+                                            <StateSelector
+                                                testId='selfHostedExpansionStateSelector'
+                                                country={formState.country}
+                                                state={formState.state}
+                                                onChange={(state: string) => {
+                                                    setFormState({...formState, state});
+                                                }}
+                                            />
+                                        </div>
+                                        <div className='form-row-third-2'>
+                                            <Input
+                                                name='postalCode'
+                                                type='text'
+                                                value={formState.postalCode}
+                                                onChange={(e: React.ChangeEvent<HTMLInputElement>) => {
+                                                    setFormState({...formState, postalCode: e.target.value});
+                                                }}
+                                                placeholder={intl.formatMessage({
+                                                    id: 'payment_form.zipcode',
+                                                    defaultMessage: 'Zip/Postal Code',
+                                                })}
+                                                required={true}
+                                            />
+                                        </div>
+                                    </div>
+                                </div>
+                            </div>
+                            <div className='rhs'>
+                                <SelfHostedExpansionCard
+                                    updateSeats={(seats: number) => {
+                                        setFormState({...formState, seats});
+                                        setAdditionalSeats(seats);
+                                    }}
+                                    canSubmit={canSubmitForm}
+                                    submit={submit}
+                                    licensedSeats={licensedSeats}
+                                    initialSeats={additionalSeats}
+                                />
+                            </div>
+                        </div>
+                        {/* {((formState.succeeded || progress === SelfHostedSignupProgress.CREATED_LICENSE) && hasLicense) && !formState.error && !formState.submitting && (
+                            <SuccessPage
+                                onClose={controlModal.close}
+                                planName={desiredPlanName}
+                            />
+                        )}
+                        {formState.submitting && (
+                            <Submitting
+                                desiredPlanName={desiredPlanName}
+                                progressBar={formState.progressBar}
+                            />
+                        )}
+                        {formState.error && (
+                            <ErrorPage
+                                nextAction={errorAction}
+                                canRetry={canRetry}
+                                errorType={canRetry ? 'generic' : 'failed_export'}
+                            />
+                        )} */}
+                        <div className='background-svg'>
+                            <BackgroundSvg/>
+                        </div>
+                    </div>
+                </FullScreenModal>
+            </RootPortal>
+        </StripeProvider>
+    );
+}

webapp/channels/src/components/self_hosted_expansion_modal/self_hosted_expansion_modal.scss

@@ -0,0 +1,178 @@
+.SelfHostedExpansionModal {
+    height: 100%;
+
+    .form-view {
+        display: flex;
+        overflow: hidden;
+        width: 100%;
+        height: 100%;
+        flex-direction: row;
+        flex-grow: 1;
+        flex-wrap: wrap;
+        align-content: top;
+        justify-content: center;
+        padding: 77px 107px;
+        color: var(--center-channel-color);
+        font-family: "Open Sans";
+        font-size: 16px;
+        font-weight: 600;
+
+        .title {
+            font-size: 22px;
+            font-weight: 600;
+        }
+
+        .form {
+            padding: 0 96px;
+            margin: 0 auto;
+
+            .form-row {
+                display: flex;
+                width: 100%;
+                margin-bottom: 24px;
+            }
+
+            .form-row-third-1 {
+                width: 66%;
+                max-width: 288px;
+                margin-right: 16px;
+
+                .DropdownInput {
+                    z-index: 99999;
+                    margin-top: 0;
+                }
+            }
+
+            .DropdownInput {
+                position: relative;
+                z-index: 999999;
+                height: 36px;
+                margin-bottom: 24px;
+
+                .Input_fieldset {
+                    height: 43px;
+                }
+            }
+
+            .form-row-third-2 {
+                width: 34%;
+                max-width: 144px;
+            }
+
+            .section-title {
+                margin-bottom: 24px;
+                color: rgba(var(--center-channel-color-rgb), 0.72);
+                font-size: 16px;
+                font-weight: 600;
+                text-align: left;
+            }
+
+            .Input_fieldset {
+                height: 40px;
+                padding: 2px 1px;
+                background: var(--center-channel-bg);
+
+                .Input {
+                    height: 32px;
+                    background: inherit;
+                }
+
+                .Input_wrapper {
+                    margin: 0;
+                }
+            }
+        }
+
+        >.lhs {
+            width: 25%;
+        }
+
+        >.center {
+            width: 50%;
+        }
+
+        >.rhs {
+            position: sticky;
+            display: flex;
+            width: 25%;
+            flex-direction: column;
+            align-items: center;
+        }
+
+        .submitting,
+        .success,
+        .failed {
+            display: flex;
+            overflow: hidden;
+            width: 100%;
+            height: 100%;
+            flex-direction: row;
+            flex-grow: 1;
+            flex-wrap: wrap;
+            align-content: center;
+            justify-content: center;
+            padding: 77px 107px;
+            color: var(--center-channel-color);
+            font-family: "Open Sans";
+            font-size: 16px;
+            font-weight: 600;
+
+            .IconMessage .content .IconMessage-link {
+                margin-left: 0;
+            }
+        }
+
+        .background-svg {
+            position: absolute;
+            z-index: -1;
+            top: 0;
+            width: 100%;
+            height: 100%;
+
+            >div {
+                position: absolute;
+                top: 0;
+                left: 0;
+            }
+        }
+
+        .self-hosted-agreed-terms {
+            label {
+                display: flex;
+                align-items: flex-start;
+                justify-content: flex-start;
+            }
+
+            input[type=checkbox] {
+                margin-right: 12px;
+            }
+
+            font-size: 16px;
+        }
+    }
+
+    @media (max-width: 1020px) {
+        .SelfHostedExpansionModal {
+            .form-view {
+                >.lhs {
+                    display: none;
+                }
+
+                >.center {
+                    width: 66%;
+                }
+
+                >.rhs {
+                    width: 33%;
+                }
+            }
+        }
+    }
+
+    .FullScreenModal {
+        .close-x {
+            top: 12px;
+            right: 12px;
+        }
+    }
+}

webapp/channels/src/components/self_hosted_expansion_modal/success_page.scss

@@ -0,0 +1,20 @@
+.SelfHostedPurchaseModal__success {
+    display: flex;
+    overflow: hidden;
+    width: 100%;
+    height: 100%;
+    flex-direction: row;
+    flex-grow: 1;
+    flex-wrap: wrap;
+    align-content: center;
+    justify-content: center;
+    padding: 77px 107px;
+    color: var(--center-channel-color);
+    font-family: "Open Sans";
+    font-size: 16px;
+    font-weight: 600;
+}
+
+.self_hosted_expansion_success {
+    margin-top: 163px;
+}

webapp/channels/src/components/self_hosted_expansion_modal/success_page.tsx

@@ -0,0 +1,77 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+import React from 'react';
+import {FormattedMessage} from 'react-intl';
+
+import {NavLink} from 'react-router-dom';
+
+import {useDispatch} from 'react-redux';
+
+import IconMessage from 'components/purchase_modal/icon_message';
+import PaymentSuccessStandardSvg from 'components/common/svg_images_components/payment_success_standard_svg';
+import {ConsolePages, ModalIdentifiers} from 'utils/constants';
+import BackgroundSvg from 'components/common/svg_images_components/background_svg';
+import {closeModal} from 'actions/views/modals';
+
+import './success_page.scss';
+
+export default function SelfHostedExpansionSuccessPage() {
+    const dispatch = useDispatch();
+    const titleText = (
+        <FormattedMessage
+            id={'self_hosted_expansion.expand_success'}
+            defaultMessage={'You\'ve successfully updated your license seat count'}
+        />
+    );
+
+    const formattedSubtitleText = (
+        <FormattedMessage
+            id={'self_hosted_expansion.license_applied'}
+            defaultMessage={'The license has been automatically applied to your Mattermost instance. Your updated invoice will be visible in the <billing>Billing section</billing> of the system console.'}
+            values={{
+                billing: (billingText: React.ReactNode) => (
+                    <NavLink
+                        to={ConsolePages.BILLING_HISTORY}
+                        target='_blank'
+                        rel='noreferrer'
+                    >
+                        {billingText}
+                    </NavLink>
+                ),
+            }}
+        />
+    );
+
+    const formattedButtonText = (
+        <FormattedMessage
+            id={'self_hosted_expansion.close'}
+            defaultMessage={'Close'}
+        />
+    );
+
+    const icon = (
+        <PaymentSuccessStandardSvg
+            width={444}
+            height={313}
+        />
+    );
+
+    return (
+        <div className='self_hosted_expansion_success'>
+            <IconMessage
+                className={'selfHostedExpansionModal__success'}
+                formattedTitle={titleText}
+                formattedSubtitle={formattedSubtitleText}
+                testId='selfHostedExpansionSuccess'
+                icon={icon}
+                formattedButtonText={formattedButtonText}
+                buttonHandler={() => dispatch(closeModal(ModalIdentifiers.SUCCESS_MODAL))}
+            />
+            <div className='background-svg'>
+                <BackgroundSvg/>
+            </div>
+        </div>
+    );
+}
+

webapp/channels/src/components/self_hosted_purchase_modal/index.tsx

@@ -27,6 +27,7 @@ import {isModalOpen} from 'selectors/views/modals';
 import {isDevModeEnabled} from 'selectors/general';
 
 import {COUNTRIES} from 'utils/countries';
+import {inferNames} from 'utils/hosted_customer';
 
 import {
     ModalIdentifiers,
@@ -49,7 +50,6 @@ import useControlSelfHostedPurchaseModal from 'components/common/hooks/useContro
 import useFetchStandardAnalytics from 'components/common/hooks/useFetchStandardAnalytics';
 
 import {ValueOf} from '@mattermost/types/utilities';
-import {UserProfile} from '@mattermost/types/users';
 import {
     SelfHostedSignupProgress,
     SelfHostedSignupCustomerResponse,
@@ -270,17 +270,6 @@ interface FakeProgress {
     intervalId?: NodeJS.Timeout;
 }
 
-function inferNames(user: UserProfile, cardName: string): [string, string] {
-    if (user.first_name) {
-        return [user.first_name, user.last_name];
-    }
-    const names = cardName.split(' ');
-    if (cardName.length === 2) {
-        return [names[0], names[1]];
-    }
-    return [names[0], names.slice(1).join(' ')];
-}
-
 export default function SelfHostedPurchaseModal(props: Props) {
     useFetchStandardAnalytics();
     useNoEscape();

webapp/channels/src/utils/constants.tsx

@@ -459,6 +459,7 @@ export const ModalIdentifiers = {
     DELETE_WORKSPACE_RESULT: 'delete_workspace_result',
     SCREENING_IN_PROGRESS: 'screening_in_progress',
     CONFIRM_SWITCH_TO_YEARLY: 'confirm_switch_to_yearly',
+    SELF_HOSTED_EXPANSION: 'self_hosted_expansion',
 };
 
 export const UserStatuses = {
@@ -738,6 +739,7 @@ export const TELEMETRY_CATEGORIES = {
     CLOUD_PURCHASING: 'cloud_purchasing',
     CLOUD_PRICING: 'cloud_pricing',
     SELF_HOSTED_PURCHASING: 'self_hosted_purchasing',
+    SELF_HOSTED_EXPANSION: 'self_hosted_expansion',
     CLOUD_ADMIN: 'cloud_admin',
     CLOUD_DELINQUENCY: 'cloud_delinquency',
     SELF_HOSTED_ADMIN: 'self_hosted_admin',
@@ -1068,6 +1070,7 @@ export const CloudLinks = {
     SELF_HOSTED_SIGNUP: 'https://customers.mattermost.com/signup',
     DELINQUENCY_DOCS: 'https://docs.mattermost.com/about/cloud-subscriptions.html#failed-or-late-payments',
     SELF_HOSTED_PRICING: 'https://mattermost.com/pricing/#self-hosted',
+    SELF_HOSTED_BILLING: 'https://docs.mattermost.com/manage/self-hosted-billing.html',
 };
 
 export const HostedCustomerLinks = {
@@ -1998,6 +2001,7 @@ export const ConsolePages = {
     WEB_SERVER: '/admin_console/environment/web_server',
     PUSH_NOTIFICATION_CENTER: '/admin_console/environment/push_notification_server',
     SMTP: '/admin_console/environment/smtp',
+    BILLING_HISTORY: 'admin_console/billing/billing_history',
 };
 
 export const WindowSizes = {

webapp/channels/src/utils/hosted_customer.ts

@@ -2,6 +2,7 @@
 // See LICENSE.txt for license information.
 
 import {Product} from '@mattermost/types/cloud';
+import {UserProfile} from '@mattermost/types/users';
 
 // find a self-hosted product based on its SKU
 // This function should not be used for cloud products, because there are
@@ -17,3 +18,13 @@ export const findSelfHostedProductBySku = (products: Record<string, Product>, sk
     return matches[0];
 };
 
+export const inferNames = (user: UserProfile, cardName: string): [string, string] => {
+    if (user.first_name) {
+        return [user.first_name, user.last_name];
+    }
+    const names = cardName.split(' ');
+    if (cardName.length === 2) {
+        return [names[0], names[1]];
+    }
+    return [names[0], names.slice(1).join(' ')];
+};

webapp/platform/client/src/client4.ts

@@ -32,6 +32,7 @@ import {
     SelfHostedSignupCustomerResponse,
     SelfHostedSignupSuccessResponse,
     SelfHostedSignupBootstrapResponse,
+    SelfHostedExpansionRequest,
 } from '@mattermost/types/hosted_customer';
 import {ChannelCategory, OrderedChannelCategories} from '@mattermost/types/channel_categories';
 
@@ -3892,6 +3893,13 @@ export default class Client4 {
         );
     };
 
+    confirmSelfHostedExpansion = (setupIntentId: string, expandRequest: SelfHostedExpansionRequest) => {
+        return this.doFetch<SelfHostedSignupSuccessResponse>(
+            `${this.getHostedCustomerRoute()}/confirm?expand=true`,
+            {method: 'post', body: JSON.stringify({stripe_setup_intent_id: setupIntentId, subscription: expandRequest})},
+        );
+    }
+
     createPaymentMethod = async () => {
         return this.doFetch(
             `${this.getCloudRoute()}/payment`,

webapp/platform/types/src/hosted_customer.ts

@@ -74,3 +74,7 @@ export interface TrueUpReviewProfileReducer extends TrueUpReviewProfile {
 export interface TrueUpReviewStatusReducer extends TrueUpReviewStatus {
     getRequestState: RequestState;
 }
+
+export interface SelfHostedExpansionRequest {
+    seats: number;
+}