(core) Makes EE frontend behave as core if EE isn't activated

Summary:
- Makes EE decide which ActivationPage to use
- Makes ProductUpgrades use core implementation if not activated
- Changes banners to proxy to core implementation if EE not activated
- [Fix] Enables new site creation in EE as in Core:
    - Core enables people to freely create new team sites.
    - Enterprise currently redirects to the pricing page.
    - This enables enterprise to also create team sites, instead of
    redirecting.

Test Plan: Manually test in EE, unit tests in Jenkins

Reviewers: paulfitz, jordigh

Reviewed By: paulfitz

Differential Revision: https://phab.getgrist.com/D4264

app/client/components/CoreBanners.ts

@@ -0,0 +1,10 @@
+import {AppModel} from 'app/client/models/AppModel';
+import {DocPageModel} from 'app/client/models/DocPageModel';
+
+export function buildHomeBanners(_app: AppModel) {
+  return null;
+}
+
+export function buildDocumentBanners(_docPageModel: DocPageModel) {
+  return null;
+}

app/client/ui/AppUI.ts

@@ -82,7 +82,7 @@ function createMainPage(appModel: AppModel, appObj: App) {
     } else if (pageType === 'admin') {
       return domAsync(loadAdminPanel().then(m => dom.create(m.AdminPanel, appModel)));
     } else if (pageType === 'activation') {
-      return domAsync(loadActivationPage().then(ap => dom.create(ap.ActivationPage, appModel)));
+      return domAsync(loadActivationPage().then(ap => dom.create(ap.getActivationPage(), appModel)));
     } else {
       return dom.create(pagePanelsDoc, appModel, appObj);
     }

app/client/ui/CreateTeamModal.ts

@@ -24,10 +24,10 @@ export async function buildNewSiteModal(context: Disposable, options: {
   appModel: AppModel,
   plan?: PlanSelection,
   onCreate?: () => void
-}) {
+}): Promise<void> {
   const { onCreate } = options;
 
-  return showModal(
+  showModal(
     context,
     (_owner: Disposable, ctrl: IModalControl) => dom.create(NewSiteModalContent, ctrl, onCreate),
     dom.cls(cssModalIndex.className),
@@ -87,12 +87,12 @@ export function buildUpgradeModal(owner: Disposable, options: {
   throw new UserError(t(`Billing is not supported in grist-core`));
 }
 
-export interface UpgradeButton  {
+export interface IUpgradeButton {
   showUpgradeCard(...args: DomArg<HTMLElement>[]): DomContents;
   showUpgradeButton(...args: DomArg<HTMLElement>[]): DomContents;
 }
 
-export function buildUpgradeButton(owner: IDisposableOwner, app: AppModel): UpgradeButton {
+export function buildUpgradeButton(owner: IDisposableOwner, app: AppModel): IUpgradeButton {
   return {
     showUpgradeCard: () => null,
     showUpgradeButton: () => null,

app/client/ui/DefaultActivationPage.ts

@@ -0,0 +1,18 @@
+import {AppModel} from 'app/client/models/AppModel';
+import { Disposable, IDomCreator } from 'grainjs';
+
+export type IActivationPageCreator = IDomCreator<[AppModel]>
+
+/**
+ * A blank ActivationPage stand-in, as it's possible for the frontend to try and load an "activation page",
+ * even though there's no activation in core.
+ */
+export class DefaultActivationPage extends Disposable {
+  constructor(_appModel: AppModel) {
+    super();
+  }
+
+  public buildDom() {
+    return null;
+  }
+}

stubs/app/client/components/Banners.ts

@@ -1,10 +1,2 @@
-import {AppModel} from 'app/client/models/AppModel';
-import {DocPageModel} from 'app/client/models/DocPageModel';
+export { buildHomeBanners, buildDocumentBanners } from 'app/client/components/CoreBanners';
 
-export function buildHomeBanners(_app: AppModel) {
-  return null;
-}
-
-export function buildDocumentBanners(_docPageModel: DocPageModel) {
-  return null;
-}

stubs/app/client/ui/ActivationPage.ts

@@ -1,12 +1,7 @@
-import {AppModel} from 'app/client/models/AppModel';
-import {Disposable} from 'grainjs';
+import {
+  DefaultActivationPage, IActivationPageCreator
+} from "app/client/ui/DefaultActivationPage";
 
-export class ActivationPage extends Disposable {
-  constructor(_appModel: AppModel) {
-    super();
-  }
-
-  public buildDom() {
-    return null;
-  }
+export function getActivationPage(): IActivationPageCreator {
+  return DefaultActivationPage;
 }