From dd70ea43ffce7a051836d999303bec77e8e357b1 Mon Sep 17 00:00:00 2001
From: Alexey Zinoviev <alexey.zinoviev@xored.com>
Date: Tue, 9 Apr 2024 16:25:38 +0400
Subject: [PATCH] UBERF-6353: Extensible preview (#5264)

---
 models/attachment/package.json                |  3 +-
 models/attachment/src/index.ts                | 57 ++++++++++++-
 models/attachment/src/plugin.ts               |  3 +-
 .../src/components/PDFViewer.svelte           | 22 +++--
 plugins/attachment-assets/lang/en.json        |  3 +-
 plugins/attachment-assets/lang/es.json        |  3 +-
 plugins/attachment-assets/lang/pt.json        |  3 +-
 plugins/attachment-assets/lang/ru.json        |  3 +-
 .../src/components/AttachmentActions.svelte   | 45 ++++++++--
 .../src/components/AttachmentPresenter.svelte | 38 +++++----
 plugins/attachment-resources/src/index.ts     |  7 +-
 plugins/attachment-resources/src/utils.ts     | 83 ++++++++++++++++++-
 plugins/attachment/package.json               |  3 +-
 plugins/attachment/src/index.ts               | 28 ++++++-
 14 files changed, 256 insertions(+), 45 deletions(-)

diff --git a/models/attachment/package.json b/models/attachment/package.json
index 78693f45be..8eeaa666ad 100644
--- a/models/attachment/package.json
+++ b/models/attachment/package.json
@@ -38,6 +38,7 @@
     "@hcengineering/model-view": "^0.6.0",
     "@hcengineering/platform": "^0.6.9",
     "@hcengineering/ui": "^0.6.11",
-    "@hcengineering/view": "^0.6.9"
+    "@hcengineering/view": "^0.6.9",
+    "@hcengineering/model-presentation": "^0.6.0"
   }
 }
diff --git a/models/attachment/src/index.ts b/models/attachment/src/index.ts
index 66807a0b57..054f05bdbc 100644
--- a/models/attachment/src/index.ts
+++ b/models/attachment/src/index.ts
@@ -14,7 +14,14 @@
 //
 
 import activity from '@hcengineering/activity'
-import type { Attachment, AttachmentMetadata, Photo, SavedAttachments } from '@hcengineering/attachment'
+import type {
+  Attachment,
+  AttachmentMetadata,
+  Photo,
+  SavedAttachments,
+  AttachmentPreviewExtension
+} from '@hcengineering/attachment'
+import presentation, { TComponentPointExtension } from '@hcengineering/model-presentation'
 import { type Domain, IndexKind, type Ref } from '@hcengineering/core'
 import {
   type Builder,
@@ -31,6 +38,7 @@ import {
 import core, { TAttachedDoc } from '@hcengineering/model-core'
 import preference, { TPreference } from '@hcengineering/model-preference'
 import view, { createAction } from '@hcengineering/model-view'
+import { type Resource } from '@hcengineering/platform'
 
 import attachment from './plugin'
 
@@ -78,8 +86,17 @@ export class TSavedAttachments extends TPreference implements SavedAttachments {
   declare attachedTo: Ref<Attachment>
 }
 
+@Model(attachment.class.AttachmentPreviewExtension, presentation.class.ComponentPointExtension)
+export class TAttachmentPreviewExtension extends TComponentPointExtension implements AttachmentPreviewExtension {
+  @Prop(TypeString(), attachment.string.ContentType)
+    contentType!: string | string[]
+
+  alignment?: string
+  availabilityChecker?: Resource<() => Promise<boolean>>
+}
+
 export function createModel (builder: Builder): void {
-  builder.createModel(TAttachment, TPhoto, TSavedAttachments)
+  builder.createModel(TAttachment, TPhoto, TSavedAttachments, TAttachmentPreviewExtension)
 
   builder.mixin(attachment.class.Attachment, core.class.Class, view.mixin.ObjectPresenter, {
     presenter: attachment.component.AttachmentPresenter
@@ -164,6 +181,42 @@ export function createModel (builder: Builder): void {
     attachment.category.Attachments
   )
 
+  builder.createDoc(
+    attachment.class.AttachmentPreviewExtension,
+    core.space.Model,
+    {
+      contentType: 'image/*',
+      alignment: 'centered',
+      component: attachment.component.PDFViewer,
+      extension: attachment.extension.AttachmentPreview
+    },
+    attachment.previewExtension.Image
+  )
+
+  builder.createDoc(
+    attachment.class.AttachmentPreviewExtension,
+    core.space.Model,
+    {
+      contentType: ['video/*', 'audio/*'],
+      alignment: 'float',
+      component: attachment.component.MediaViewer,
+      extension: attachment.extension.AttachmentPreview
+    },
+    attachment.previewExtension.Media
+  )
+
+  builder.createDoc(
+    attachment.class.AttachmentPreviewExtension,
+    core.space.Model,
+    {
+      contentType: ['application/pdf', 'application/json', 'text/*'],
+      alignment: 'float',
+      component: attachment.component.PDFViewer,
+      extension: attachment.extension.AttachmentPreview
+    },
+    attachment.previewExtension.PDF
+  )
+
   createAction(builder, {
     action: view.actionImpl.ShowEditor,
     actionProps: {
diff --git a/models/attachment/src/plugin.ts b/models/attachment/src/plugin.ts
index 18da210538..7370194f96 100644
--- a/models/attachment/src/plugin.ts
+++ b/models/attachment/src/plugin.ts
@@ -40,7 +40,8 @@ export default mergeIds(attachmentId, attachment, {
     PinAttachment: '' as IntlString,
     UnPinAttachment: '' as IntlString,
     FilterAttachments: '' as IntlString,
-    RemovedAttachment: '' as IntlString
+    RemovedAttachment: '' as IntlString,
+    ContentType: '' as IntlString
   },
   ids: {
     TxAttachmentCreate: '' as Ref<TxViewlet>,
diff --git a/packages/presentation/src/components/PDFViewer.svelte b/packages/presentation/src/components/PDFViewer.svelte
index 4b5e3da591..6cb20468e2 100644
--- a/packages/presentation/src/components/PDFViewer.svelte
+++ b/packages/presentation/src/components/PDFViewer.svelte
@@ -29,6 +29,7 @@
   export let showIcon = true
   export let fullSize = false
   export let isLoading = false
+  export let css: string | undefined = undefined
 
   const dispatch = createEventDispatcher()
 
@@ -45,6 +46,19 @@
   let download: HTMLAnchorElement
   $: src = file === undefined ? '' : getFileUrl(file, 'full', name)
   $: isImage = contentType !== undefined && contentType.startsWith('image/')
+
+  let frame: HTMLIFrameElement | undefined = undefined
+  // eslint-disable-next-line @typescript-eslint/prefer-optional-chain
+  $: if (css !== undefined && frame !== undefined && frame !== null) {
+    frame.onload = () => {
+      const head = frame?.contentDocument?.querySelector('head')
+
+      // eslint-disable-next-line @typescript-eslint/prefer-optional-chain
+      if (css !== undefined && head !== undefined && head !== null) {
+        head.appendChild(document.createElement('style')).textContent = css
+      }
+    }
+  }
 </script>
 
 <ActionContext context={{ mode: 'browser' }} />
@@ -69,7 +83,7 @@
   </svelte:fragment>
 
   <svelte:fragment slot="utils">
-    {#if !isLoading && isImage && src !== ''}
+    {#if !isLoading && src !== ''}
       <a class="no-line" href={src} download={name} bind:this={download}>
         <Button
           icon={Download}
@@ -93,7 +107,7 @@
         <img class="img-fit" {src} alt="" />
       </div>
     {:else}
-      <iframe class="pdfviewer-content" src={src + '#view=FitH&navpanes=0'} title="" />
+      <iframe bind:this={frame} class="pdfviewer-content" src={src + '#view=FitH&navpanes=0'} title="" />
     {/if}
   {:else}
     <div class="centered">
@@ -119,9 +133,7 @@
   .pdfviewer-content {
     flex-grow: 1;
     overflow: auto;
-    border-style: none;
-    border-radius: 0.5rem;
-    background-color: var(--theme-bg-color);
+    border: none;
 
     &.img {
       display: flex;
diff --git a/plugins/attachment-assets/lang/en.json b/plugins/attachment-assets/lang/en.json
index 5a66a0720e..cde19f12fe 100644
--- a/plugins/attachment-assets/lang/en.json
+++ b/plugins/attachment-assets/lang/en.json
@@ -51,7 +51,8 @@
     "PinAttachment": "Mark important",
     "UnPinAttachment": "Mark less important",
     "FilterAttachments": "Attachments",
-    "RemovedAttachment": "Removed attachment"
+    "RemovedAttachment": "Removed attachment",
+    "ContentType": "Content type"
   }, 
   "status": {
     "FileTooLarge": "File too large"
diff --git a/plugins/attachment-assets/lang/es.json b/plugins/attachment-assets/lang/es.json
index 3d66fe29aa..34d2193271 100644
--- a/plugins/attachment-assets/lang/es.json
+++ b/plugins/attachment-assets/lang/es.json
@@ -51,7 +51,8 @@
     "PinAttachment": "Marcar como importante",
     "UnPinAttachment": "Marcar como menos importante",
     "FilterAttachments": "Adjuntos",
-    "RemovedAttachment": "Adjunto eliminado"
+    "RemovedAttachment": "Adjunto eliminado",
+    "ContentType": "Tipo de contenido"
   },
   "status": {
     "FileTooLarge": "Archivo demasiado grande"
diff --git a/plugins/attachment-assets/lang/pt.json b/plugins/attachment-assets/lang/pt.json
index 53cb12e158..d3e1f36c92 100644
--- a/plugins/attachment-assets/lang/pt.json
+++ b/plugins/attachment-assets/lang/pt.json
@@ -51,7 +51,8 @@
     "PinAttachment": "Marcar como importante",
     "UnPinAttachment": "Marcar como menos importante",
     "FilterAttachments": "Anexos",
-    "RemovedAttachment": "Anexo removido"
+    "RemovedAttachment": "Anexo removido",
+    "ContentType": "Tipo de conteúdo"
   },
   "status": {
     "FileTooLarge": "Ficheiro demasiado grande"
diff --git a/plugins/attachment-assets/lang/ru.json b/plugins/attachment-assets/lang/ru.json
index 7a57145777..4358088e0d 100644
--- a/plugins/attachment-assets/lang/ru.json
+++ b/plugins/attachment-assets/lang/ru.json
@@ -51,7 +51,8 @@
     "PinAttachment": "Пометить как важное",
     "UnPinAttachment": "Убрать пометку важное",
     "FilterAttachments": "Вложения",
-    "RemovedAttachment": "Удалил(а) вложение"
+    "RemovedAttachment": "Удалил(а) вложение",
+    "ContentType": "Тип контента"
   },
   "status": {
     "FileTooLarge": "Файл слишком большой"
diff --git a/plugins/attachment-resources/src/components/AttachmentActions.svelte b/plugins/attachment-resources/src/components/AttachmentActions.svelte
index 8426409353..2c32947649 100644
--- a/plugins/attachment-resources/src/components/AttachmentActions.svelte
+++ b/plugins/attachment-resources/src/components/AttachmentActions.svelte
@@ -13,13 +13,22 @@
 // limitations under the License.
 -->
 <script lang="ts">
-  import type { Attachment } from '@hcengineering/attachment'
+  import { AttachmentPreviewExtension, type Attachment } from '@hcengineering/attachment'
   import { getResource } from '@hcengineering/platform'
-  import { PDFViewer, getFileUrl } from '@hcengineering/presentation'
-  import { Action as UIAction, ActionIcon, IconMoreH, IconOpen, Menu, closeTooltip, showPopup } from '@hcengineering/ui'
+  import { getFileUrl } from '@hcengineering/presentation'
+  import {
+    Action as UIAction,
+    ActionIcon,
+    IconMoreH,
+    IconOpen,
+    Menu,
+    closeTooltip,
+    showPopup,
+    PopupAlignment
+  } from '@hcengineering/ui'
   import view, { Action } from '@hcengineering/view'
-  import MediaViewer from './MediaViewer.svelte'
 
+  import { previewTypes, getPreviewType, isOpenable } from '../utils'
   import attachmentPlugin from '../plugin'
   import FileDownload from './icons/FileDownload.svelte'
 
@@ -30,10 +39,27 @@
   let download: HTMLAnchorElement
 
   $: contentType = attachment?.type ?? ''
-  $: openable =
-    contentType.includes('application/pdf') || contentType.startsWith('image/') || contentType.startsWith('video/')
+  let openable = false
+  $: {
+    void isOpenable(contentType, $previewTypes).then((res) => {
+      openable = res
+    })
+  }
+
+  let previewType: AttachmentPreviewExtension | undefined = undefined
+  $: if (openable) {
+    void getPreviewType(contentType, $previewTypes).then((res) => {
+      previewType = res
+    })
+  } else {
+    previewType = undefined
+  }
 
   function showPreview (e: MouseEvent): void {
+    if (!openable || previewType === undefined) {
+      return
+    }
+
     e.preventDefault()
     e.stopPropagation()
     if (e.metaKey || e.ctrlKey) {
@@ -41,10 +67,11 @@
       return
     }
     closeTooltip()
+
     showPopup(
-      contentType.startsWith('video/') ? MediaViewer : PDFViewer,
-      { file: attachment.file, name: attachment.name, contentType, value: attachment },
-      contentType.startsWith('image/') ? 'centered' : 'float'
+      previewType.component,
+      { ...(previewType.props ?? {}), file: attachment.file, name: attachment.name, contentType, value: attachment },
+      (previewType.alignment ?? 'center') as PopupAlignment
     )
   }
 
diff --git a/plugins/attachment-resources/src/components/AttachmentPresenter.svelte b/plugins/attachment-resources/src/components/AttachmentPresenter.svelte
index 012e34d211..b8e066dfd4 100644
--- a/plugins/attachment-resources/src/components/AttachmentPresenter.svelte
+++ b/plugins/attachment-resources/src/components/AttachmentPresenter.svelte
@@ -15,14 +15,13 @@
 -->
 <script lang="ts">
   import { createEventDispatcher } from 'svelte'
-  import type { Attachment } from '@hcengineering/attachment'
-  import { showPopup, closeTooltip, Label, getIconSize2x, Loading } from '@hcengineering/ui'
-  import presentation, { PDFViewer, getFileUrl } from '@hcengineering/presentation'
+  import type { Attachment, AttachmentPreviewExtension } from '@hcengineering/attachment'
+  import { showPopup, closeTooltip, Label, getIconSize2x, Loading, PopupAlignment } from '@hcengineering/ui'
+  import presentation, { getFileUrl } from '@hcengineering/presentation'
   import filesize from 'filesize'
   import core from '@hcengineering/core'
   import { permissionsStore } from '@hcengineering/view-resources'
-  import MediaViewer from './MediaViewer.svelte'
-  import { getType } from '../utils'
+  import { getType, isOpenable, previewTypes, getPreviewType } from '../utils'
 
   import AttachmentName from './AttachmentName.svelte'
 
@@ -54,18 +53,29 @@
   function isImage (contentType: string): boolean {
     return getType(contentType) === 'image'
   }
-  function isPlayable (contentType: string) {
-    const type = getType(contentType)
-    return type === 'video' || type === 'audio'
+
+  let openable = false
+  $: if (value !== undefined) {
+    void isOpenable(value.type, $previewTypes).then((res) => {
+      openable = res
+    })
+  } else {
+    openable = false
   }
-  function openEmbedded (contentType: string): boolean {
-    return getType(contentType) !== 'other'
+
+  let previewType: AttachmentPreviewExtension | undefined = undefined
+  $: if (openable && value !== undefined) {
+    void getPreviewType(value.type, $previewTypes).then((res) => {
+      previewType = res
+    })
+  } else {
+    previewType = undefined
   }
 
   function clickHandler (e: MouseEvent): void {
     if (value === undefined) return
 
-    if (!openEmbedded(value.type)) return
+    if (!openable || previewType === undefined) return
     e.preventDefault()
     e.stopPropagation()
     if (e.metaKey || e.ctrlKey) {
@@ -74,9 +84,9 @@
     }
     closeTooltip()
     showPopup(
-      isPlayable(value.type) ? MediaViewer : PDFViewer,
-      { file: value.file, name: value.name, contentType: value.type, value },
-      isImage(value.type) ? 'centered' : 'float'
+      previewType.component,
+      { ...(previewType.props ?? {}), file: value.file, name: value.name, contentType: value.type, value },
+      (previewType.alignment ?? 'center') as PopupAlignment
     )
   }
 
diff --git a/plugins/attachment-resources/src/index.ts b/plugins/attachment-resources/src/index.ts
index 6c3280e84f..b44c687fa3 100644
--- a/plugins/attachment-resources/src/index.ts
+++ b/plugins/attachment-resources/src/index.ts
@@ -17,7 +17,7 @@ import attachment, { type Attachment } from '@hcengineering/attachment'
 import { type ObjQueryType, SortingOrder, type SortingQuery, type Markup } from '@hcengineering/core'
 import { type IntlString, type Resources } from '@hcengineering/platform'
 import preference from '@hcengineering/preference'
-import { getClient } from '@hcengineering/presentation'
+import { getClient, PDFViewer } from '@hcengineering/presentation'
 import activity, { type ActivityMessage, type DocUpdateMessage } from '@hcengineering/activity'
 
 import TxAttachmentCreate from './components/activity/TxAttachmentCreate.svelte'
@@ -42,6 +42,7 @@ import IconAttachment from './components/icons/Attachment.svelte'
 import AttachmentPreview from './components/AttachmentPreview.svelte'
 import AttachmentsUpdatedMessage from './components/activity/AttachmentsUpdatedMessage.svelte'
 import AttachmentsTooltip from './components/AttachmentsTooltip.svelte'
+import MediaViewer from './components/MediaViewer.svelte'
 import { deleteFile, uploadFile } from './utils'
 
 export * from './types'
@@ -258,7 +259,9 @@ export default async (): Promise<Resources> => ({
     AttachmentGalleryPresenter,
     Attachments,
     FileBrowser,
-    Photos
+    Photos,
+    PDFViewer,
+    MediaViewer
   },
   activity: {
     TxAttachmentCreate,
diff --git a/plugins/attachment-resources/src/utils.ts b/plugins/attachment-resources/src/utils.ts
index 14591f885a..30e4fb9c86 100644
--- a/plugins/attachment-resources/src/utils.ts
+++ b/plugins/attachment-resources/src/utils.ts
@@ -14,7 +14,12 @@
 // limitations under the License.
 //
 
-import { type Attachment, type AttachmentMetadata } from '@hcengineering/attachment'
+import { writable } from 'svelte/store'
+import attachments, {
+  type AttachmentPreviewExtension,
+  type Attachment,
+  type AttachmentMetadata
+} from '@hcengineering/attachment'
 import {
   type Class,
   concatLink,
@@ -24,8 +29,16 @@ import {
   type Space,
   type TxOperations as Client
 } from '@hcengineering/core'
-import presentation, { getFileUrl, getImageSize } from '@hcengineering/presentation'
-import { PlatformError, Severity, Status, getMetadata, setPlatformStatus, unknownError } from '@hcengineering/platform'
+import presentation, { createQuery, getFileUrl, getImageSize } from '@hcengineering/presentation'
+import {
+  PlatformError,
+  Severity,
+  Status,
+  getMetadata,
+  getResource,
+  setPlatformStatus,
+  unknownError
+} from '@hcengineering/platform'
 
 import attachment from './plugin'
 
@@ -174,3 +187,67 @@ async function getVideoSize (uuid: string): Promise<{ width: number, height: num
 
   return await promise
 }
+
+export const previewTypes = writable<AttachmentPreviewExtension[]>([])
+const previewTypesQuery = createQuery(true)
+previewTypesQuery.query(attachments.class.AttachmentPreviewExtension, {}, (result) => {
+  previewTypes.set(result)
+})
+
+function getPreviewTypeRegExp (type: string): RegExp {
+  return new RegExp(type.replace(/\//g, '\\/'))
+}
+
+/**
+ * @public
+ */
+export async function isOpenable (contentType: string, _previewTypes: AttachmentPreviewExtension[]): Promise<boolean> {
+  for (const previewType of _previewTypes) {
+    if (await isApplicableType(previewType, contentType)) {
+      return true
+    }
+  }
+
+  return false
+}
+
+async function isApplicableType (
+  { contentType, availabilityChecker }: AttachmentPreviewExtension,
+  _contentType: string
+): Promise<boolean> {
+  const checkAvailability = availabilityChecker !== undefined ? await getResource(availabilityChecker) : undefined
+  const isAvailable: boolean = checkAvailability === undefined || (await checkAvailability())
+
+  return (
+    isAvailable &&
+    (Array.isArray(contentType) ? contentType : [contentType]).some((type) =>
+      getPreviewTypeRegExp(type).test(_contentType)
+    )
+  )
+}
+
+function comparePreviewTypes (a: AttachmentPreviewExtension, b: AttachmentPreviewExtension): number {
+  if (a.order === undefined && b.order === undefined) {
+    return 0
+  } else if (a.order === undefined) {
+    return -1
+  } else if (b.order === undefined) {
+    return 1
+  } else {
+    return a.order - b.order
+  }
+}
+
+export async function getPreviewType (
+  contentType: string,
+  _previewTypes: AttachmentPreviewExtension[]
+): Promise<AttachmentPreviewExtension | undefined> {
+  const applicableTypes: AttachmentPreviewExtension[] = []
+  for (const previewType of _previewTypes) {
+    if (await isApplicableType(previewType, contentType)) {
+      applicableTypes.push(previewType)
+    }
+  }
+
+  return applicableTypes.sort(comparePreviewTypes)[0]
+}
diff --git a/plugins/attachment/package.json b/plugins/attachment/package.json
index 0cf8873576..d77b0f013b 100644
--- a/plugins/attachment/package.json
+++ b/plugins/attachment/package.json
@@ -35,7 +35,8 @@
     "@hcengineering/platform": "^0.6.9",
     "@hcengineering/ui": "^0.6.11",
     "@hcengineering/core": "^0.6.28",
-    "@hcengineering/preference": "^0.6.9"
+    "@hcengineering/preference": "^0.6.9",
+    "@hcengineering/presentation": "^0.6.2"
   },
   "repository": "https://github.com/hcengineering/anticrm",
   "publishConfig": {
diff --git a/plugins/attachment/src/index.ts b/plugins/attachment/src/index.ts
index 468993295c..1a02fe37c0 100644
--- a/plugins/attachment/src/index.ts
+++ b/plugins/attachment/src/index.ts
@@ -18,7 +18,8 @@ import type { AttachedDoc, Class, Ref } from '@hcengineering/core'
 import type { Asset, Plugin } from '@hcengineering/platform'
 import { IntlString, plugin, Resource } from '@hcengineering/platform'
 import type { Preference } from '@hcengineering/preference'
-import { AnyComponent } from '@hcengineering/ui'
+import { AnyComponent, ComponentExtensionId } from '@hcengineering/ui'
+import { type ComponentPointExtension } from '@hcengineering/presentation'
 
 /**
  * @public
@@ -71,6 +72,16 @@ export interface SavedAttachments extends Preference {
   attachedTo: Ref<Attachment>
 }
 
+/**
+ * @public
+ */
+export interface AttachmentPreviewExtension extends ComponentPointExtension {
+  contentType: string | string[]
+  alignment?: string
+  // Extension is only available if this checker returns true
+  availabilityChecker?: Resource<() => Promise<boolean>>
+}
+
 /**
  * @public
  */
@@ -81,7 +92,9 @@ export default plugin(attachmentId, {
     Attachments: '' as AnyComponent,
     Photos: '' as AnyComponent,
     AttachmentsPresenter: '' as AnyComponent,
-    FileBrowser: '' as AnyComponent
+    FileBrowser: '' as AnyComponent,
+    PDFViewer: '' as AnyComponent,
+    MediaViewer: '' as AnyComponent
   },
   icon: {
     Attachment: '' as Asset,
@@ -90,7 +103,8 @@ export default plugin(attachmentId, {
   class: {
     Attachment: '' as Ref<Class<Attachment>>,
     Photo: '' as Ref<Class<Photo>>,
-    SavedAttachments: '' as Ref<Class<SavedAttachments>>
+    SavedAttachments: '' as Ref<Class<SavedAttachments>>,
+    AttachmentPreviewExtension: '' as Ref<Class<AttachmentPreviewExtension>>
   },
   helper: {
     UploadFile: '' as Resource<(file: File) => Promise<string>>,
@@ -116,5 +130,13 @@ export default plugin(attachmentId, {
     DeleteFile: '' as IntlString,
     Attachments: '' as IntlString,
     FileBrowser: '' as IntlString
+  },
+  previewExtension: {
+    Image: '' as Ref<AttachmentPreviewExtension>,
+    Media: '' as Ref<AttachmentPreviewExtension>,
+    PDF: '' as Ref<AttachmentPreviewExtension>
+  },
+  extension: {
+    AttachmentPreview: '' as ComponentExtensionId
   }
 })