(core) suspend a team site after an AppSumo refund

Summary:
This suspends service to a team site for which an AppSumo refund has been made, and nudges users to their free personal account.

I expect that a refund request would fail for a site where user is also paying us for extra seats.

Test Plan: tested manually

Reviewers: dsagal

Reviewed By: dsagal

Differential Revision: https://phab.getgrist.com/D2912

app/client/models/AppModel.ts

@@ -104,7 +104,7 @@ export class TopAppModelImpl extends Disposable implements TopAppModel {
             org.billingAccount.product.name === 'suspended') {
           this.notifier.createUserError(
             'This team site is suspended. Documents can be read, but not modified.',
-            {actions: ['renew']}
+            {actions: ['renew', 'personal']}
           );
         }
       }

app/client/models/NotifyModel.ts

@@ -34,7 +34,7 @@ export interface IProgress extends Expirable {
 }
 
 // Identifies supported actions. These are implemented in NotifyUI.
-export type NotifyAction = 'upgrade' | 'renew' | 'report-problem' | 'ask-for-help';
+export type NotifyAction = 'upgrade' | 'renew' | 'personal' | 'report-problem' | 'ask-for-help';
 
 export interface INotifyOptions {
   message: string | (() => DomElementArg);     // A string, or a function that builds dom.

app/client/ui/BillingPage.ts

@@ -146,6 +146,7 @@ export class BillingPage extends Disposable {
       // name and minimizing the plan.
       const tier = sub.discountName && sub.discountName.includes(' Tier ');
       const planName = tier ? sub.discountName! : sub.activePlan.nickname;
+      const invoiceId = this._appModel.currentOrg?.billingAccount?.externalOptions?.invoiceId;
       return [
         css.summaryFeatures(
           validPlan ? [
@@ -182,7 +183,7 @@ export class BillingPage extends Disposable {
             makeSummaryFeature([`Your next invoice is `, getPriceString(sub.nextTotal),
                                 ' on ', dateFmt(sub.periodEnd)]),
           ] : null,
-          tier ? this.buildAppSumoLink(this._appModel.currentOrg?.billingAccount?.externalOptions?.invoiceId) : null,
+          invoiceId ? this.buildAppSumoLink(invoiceId) : null,
           getSubscriptionProblem(sub),
           testId('summary')
         ),
@@ -252,8 +253,7 @@ export class BillingPage extends Disposable {
   }
 
   // Include a precise link back to AppSumo for changing plans.
-  public buildAppSumoLink(invoiceId: string | undefined) {
-    if (!invoiceId) { return null; }
+  public buildAppSumoLink(invoiceId: string) {
     return dom('div',
                css.billingTextBtn({ style: 'margin: 10px 0;' },
                                   cssBreadcrumbsLink(

app/client/ui/NotifyUI.ts

@@ -31,6 +31,17 @@ function buildAction(action: NotifyAction, item: Notification, options: IBeaconO
       return dom('a', cssToastAction.cls(''), 'Renew', {target: '_blank'},
                  {href: urlState().makeUrl({billing: 'billing'})});
 
+    case 'personal':
+      if (!appModel) { return null; }
+      return cssToastAction('Go to your free personal site', dom.on('click', async () => {
+        const info = await appModel.api.getSessionAll();
+        const orgs = info.orgs.filter(org => org.owner && org.owner.id === appModel.currentUser?.id);
+        if (orgs.length !== 1) {
+          throw new Error('Cannot find personal site, sorry!');
+        }
+        window.location.assign(urlState().makeUrl({org: orgs[0].domain || undefined}));
+      }));
+
     case 'report-problem':
       return cssToastAction('Report a problem', testId('toast-report-problem'),
         dom.on('click', () => beaconOpenMessage({...options, includeAppErrors: true})));

app/gen-server/entity/Product.ts

@@ -110,8 +110,9 @@ export function getDefaultProductNames() {
   return {
     personal: 'starter',  // Personal site start off on a functional plan.
     teamInitial: 'stub',  // Team site starts off on a limited plan, requiring subscription.
-    team: 'team',         // Functional team site
-  };
+    teamCancel: 'suspended',  // Team site that has been 'turned off'.
+    team: 'team',         // Functional team site.
+ };
 }
 
 /**