feat(motd): use iframe renderer for motd

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

cypress/e2e/motd.spec.ts

@@ -23,7 +23,7 @@ describe('Motd', () => {
       headers: { 'Last-Modified': MOCK_LAST_MODIFIED }
     })
     cy.visitHome()
-    cy.getByCypressId('motd-modal').find('.markdown-body').should('contain.html', motdMockHtml)
+    cy.getMotdBody().should('contain.html', motdMockHtml)
     cy.getByCypressId('motd-dismiss')
       .click()
       .then(() => {

cypress/support/get-iframe-content.ts

@@ -7,12 +7,16 @@
 import { RendererType } from '../../src/components/render-page/window-post-message-communicator/rendering-message'
 
 declare namespace Cypress {
-  interface Chainable {
+  interface Chainable<Subject = unknown> {
     getIframeBody(rendererType?: RendererType): Chainable<Element>
 
     getReveal(): Chainable<Element>
 
     getMarkdownBody(): Chainable<Element>
+
+    getIntroBody(): Chainable<Element>
+
+    getMotdBody(): Chainable<Element>
   }
 }
 
@@ -39,3 +43,7 @@ Cypress.Commands.add('getMarkdownBody', () => {
 Cypress.Commands.add('getIntroBody', () => {
   return cy.getIframeBody(RendererType.INTRO).findByCypressId('markdown-body')
 })
+
+Cypress.Commands.add('getMotdBody', () => {
+  return cy.getIframeBody(RendererType.MOTD).findByCypressId('markdown-body')
+})

src/components/common/motd-modal/__snapshots__/motd-modal.test.tsx.snap

@@ -1,40 +1,5 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`motd modal doesn't allow html in the motd 1`] = `
-<div>
-  <span>
-    This is a mock implementation of a Modal:
-    <dialog>
-      <div
-        class="modal-body"
-      >
-        <div
-          class="markdown-body"
-          data-testid="motd-renderer"
-        >
-          <p>
-            &lt;iframe&gt;&lt;/iframe&gt;
-          </p>
-          
-
-        </div>
-      </div>
-      <div
-        class="modal-footer"
-      >
-        <button
-          class="btn btn-success"
-          data-testid="motd-dismiss"
-          type="button"
-        >
-          common.dismiss
-        </button>
-      </div>
-    </dialog>
-  </span>
-</div>
-`;
-
 exports[`motd modal doesn't render a modal if no motd has been fetched 1`] = `
 <div>
   <span
@@ -49,18 +14,14 @@ exports[`motd modal renders a modal if a motd was fetched and can dismiss it 1`]
     This is a mock implementation of a Modal: 
     <dialog>
       <div
-        class="modal-body"
+        class="bg-light modal-body"
       >
-        <div
+        <span
-          class="markdown-body"
           data-testid="motd-renderer"
         >
-          <p>
+          This is a mock implementation of a iframe renderer. Props: 
-            very important mock text!
+          {"frameClasses":"w-100","rendererType":"motd","markdownContentLines":["very important mock text!"],"adaptFrameHeightToContent":true}
-          </p>
+        </span>
-          
-
-        </div>
       </div>
       <div
         class="modal-footer"

src/components/common/motd-modal/motd-modal.test.tsx

@@ -12,9 +12,12 @@ import type { PropsWithChildren } from 'react'
 import React from 'react'
 import type { CommonModalProps } from '../modals/common-modal'
 import { mockI18n } from '../../markdown-renderer/test-utils/mock-i18n'
+import * as RenderIframeModule from '../../editor-page/renderer-pane/render-iframe'
+import { testId } from '../../../utils/test-id'
 
 jest.mock('./fetch-motd')
 jest.mock('../modals/common-modal')
+jest.mock('../../editor-page/renderer-pane/render-iframe')
 
 describe('motd modal', () => {
   beforeAll(mockI18n)
@@ -28,11 +31,17 @@ describe('motd modal', () => {
     jest.spyOn(CommonModalModule, 'CommonModal').mockImplementation((({ children, show }) => {
       return (
         <span>
-          This is a mock implementation of a Modal:
+          This is a mock implementation of a Modal: {show ? <dialog>{children}</dialog> : 'Modal is invisible'}
-          {show ? <dialog>{children}</dialog> : 'Modal is invisible'}
         </span>
       )
     }) as React.FC<PropsWithChildren<CommonModalProps>>)
+    jest.spyOn(RenderIframeModule, 'RenderIframe').mockImplementation((props) => {
+      return (
+        <span {...testId('motd-renderer')}>
+          This is a mock implementation of a iframe renderer. Props: {JSON.stringify(props)}
+        </span>
+      )
+    })
   })
 
   it('renders a modal if a motd was fetched and can dismiss it', async () => {
@@ -61,13 +70,4 @@ describe('motd modal', () => {
     await screen.findByTestId('loaded not visible')
     expect(view.container).toMatchSnapshot()
   })
-
-  it("doesn't allow html in the motd", async () => {
-    jest.spyOn(fetchMotdModule, 'fetchMotd').mockImplementation(() => {
-      return Promise.resolve({ motdText: '<iframe></iframe>', lastModified: 'yesterday' })
-    })
-    const view = render(<MotdModal></MotdModal>)
-    await screen.findByTestId('motd-renderer')
-    expect(view.container).toMatchSnapshot()
-  })
 })

src/components/common/motd-modal/motd-modal.tsx

@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import React, { Suspense, useCallback, useEffect, useState } from 'react'
+import React, { Suspense, useCallback, useMemo, useEffect, useState } from 'react'
 import { Button, Modal } from 'react-bootstrap'
 import { CommonModal } from '../modals/common-modal'
 import { Trans, useTranslation } from 'react-i18next'
@@ -13,9 +13,11 @@ import { fetchMotd, MOTD_LOCAL_STORAGE_KEY } from './fetch-motd'
 import { useAsync } from 'react-use'
 import { Logger } from '../../../utils/logger'
 import { testId } from '../../../utils/test-id'
+import { RenderIframe } from '../../editor-page/renderer-pane/render-iframe'
+import { RendererType } from '../../render-page/window-post-message-communicator/rendering-message'
+import { EditorToRendererCommunicatorContextProvider } from '../../editor-page/render-context/editor-to-renderer-communicator-context-provider'
 import { cypressId } from '../../../utils/cypress-attribute'
 
-const MotdRenderer = React.lazy(() => import('./motd-renderer'))
 const logger = new Logger('Motd')
 
 /**
@@ -29,6 +31,8 @@ export const MotdModal: React.FC = () => {
   const { error, loading, value } = useAsync(fetchMotd)
   const [dismissed, setDismissed] = useState(false)
 
+  const lines = useMemo(() => value?.motdText.split('\n'), [value?.motdText])
+
   const dismiss = useCallback(() => {
     if (value?.lastModified) {
       window.localStorage.setItem(MOTD_LOCAL_STORAGE_KEY, value.lastModified)
@@ -47,10 +51,17 @@ export const MotdModal: React.FC = () => {
   }
 
   return (
-    <CommonModal show={!!value && !loading && !error && !dismissed} title={'motd.title'} {...cypressId('motd-modal')}>
+    <CommonModal show={!!lines && !loading && !error && !dismissed} title={'motd.title'} {...cypressId('motd-modal')}>
-      <Modal.Body>
+      <Modal.Body className={'bg-light'}>
         <Suspense fallback={<WaitSpinner />}>
-          <MotdRenderer content={value?.motdText as string} />
+          <EditorToRendererCommunicatorContextProvider>
+            <RenderIframe
+              frameClasses={'w-100'}
+              rendererType={RendererType.MOTD}
+              markdownContentLines={lines as string[]}
+              adaptFrameHeightToContent={true}
+            />
+          </EditorToRendererCommunicatorContextProvider>
         </Suspense>
       </Modal.Body>
       <Modal.Footer>

src/components/common/motd-modal/motd-renderer.tsx

@@ -1,55 +0,0 @@
-/*
- * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
- *
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-import React, { useMemo } from 'react'
-import { GenericSyntaxMarkdownExtension } from '../../markdown-renderer/markdown-extension/generic-syntax-markdown-extension'
-import { useConvertMarkdownToReactDom } from '../../markdown-renderer/hooks/use-convert-markdown-to-react-dom'
-import { LinkifyFixMarkdownExtension } from '../../markdown-renderer/markdown-extension/linkify-fix-markdown-extension'
-import { EmojiMarkdownExtension } from '../../markdown-renderer/markdown-extension/emoji/emoji-markdown-extension'
-import { DebuggerMarkdownExtension } from '../../markdown-renderer/markdown-extension/debugger-markdown-extension'
-import { ProxyImageMarkdownExtension } from '../../markdown-renderer/markdown-extension/image/proxy-image-markdown-extension'
-import { YoutubeMarkdownExtension } from '../../markdown-renderer/markdown-extension/youtube/youtube-markdown-extension'
-import { AlertMarkdownExtension } from '../../markdown-renderer/markdown-extension/alert-markdown-extension'
-import { SpoilerMarkdownExtension } from '../../markdown-renderer/markdown-extension/spoiler-markdown-extension'
-import { BlockquoteExtraTagMarkdownExtension } from '../../markdown-renderer/markdown-extension/blockquote/blockquote-extra-tag-markdown-extension'
-import { VimeoMarkdownExtension } from '../../markdown-renderer/markdown-extension/vimeo/vimeo-markdown-extension'
-import { testId } from '../../../utils/test-id'
-
-export interface MotdRendererProps {
-  content: string
-}
-
-/**
- * Reads the motd from the global application state and renders it as markdown with a subset of the usual features and without HTML support.
- */
-export const MotdRenderer: React.FC<MotdRendererProps> = ({ content }) => {
-  const extensions = useMemo(
-    () => [
-      new YoutubeMarkdownExtension(),
-      new VimeoMarkdownExtension(),
-      new ProxyImageMarkdownExtension(),
-      new BlockquoteExtraTagMarkdownExtension(),
-      new AlertMarkdownExtension(),
-      new SpoilerMarkdownExtension(),
-      new GenericSyntaxMarkdownExtension(),
-      new LinkifyFixMarkdownExtension(),
-      new EmojiMarkdownExtension(),
-      new DebuggerMarkdownExtension()
-    ],
-    []
-  )
-
-  const lines = useMemo(() => content.split('\n'), [content])
-  const dom = useConvertMarkdownToReactDom(lines, extensions, true, false)
-
-  return (
-    <div {...testId('motd-renderer')} className={'markdown-body'}>
-      {dom}
-    </div>
-  )
-}
-
-export default MotdRenderer

src/components/render-page/iframe-markdown-renderer.tsx

@@ -159,6 +159,7 @@ export const IframeMarkdownRenderer: React.FC = () => {
           slideOptions={slideOptions}
         />
       )
+    case RendererType.MOTD:
     case RendererType.INTRO:
       return (
         <MarkdownDocument

src/components/render-page/window-post-message-communicator/rendering-message.ts

@@ -137,7 +137,8 @@ export type RendererToEditorMessageType =
 export enum RendererType {
   DOCUMENT = 'document',
   INTRO = 'intro',
-  SLIDESHOW = 'slideshow'
+  SLIDESHOW = 'slideshow',
+  MOTD = 'motd'
 }
 
 export interface BaseConfiguration {