fix: revert document content field rename (#6955)

Signed-off-by: Alexander Onnikov <Alexander.Onnikov@xored.com>

server-plugins/document-resources/src/index.ts

@@ -3,8 +3,8 @@
 //
 //
 
-import { Doc, concatLink } from '@hcengineering/core'
-import { Document, documentId } from '@hcengineering/document'
+import { Class, Doc, DocumentQuery, FindOptions, FindResult, Hierarchy, Ref, concatLink } from '@hcengineering/core'
+import document, { Document, documentId } from '@hcengineering/document'
 import { getMetadata } from '@hcengineering/platform'
 import { workbenchId } from '@hcengineering/workbench'
 import serverCore, { TriggerControl } from '@hcengineering/server-core'
@@ -38,11 +38,27 @@ export async function documentTextPresenter (doc: Doc): Promise<string> {
   return document.title
 }
 
+/**
+ * @public
+ */
+export async function findChildDocuments (
+  doc: Doc,
+  hiearachy: Hierarchy,
+  findAll: <T extends Doc>(
+    clazz: Ref<Class<T>>,
+    query: DocumentQuery<T>,
+    options?: FindOptions<T>
+  ) => Promise<FindResult<T>>
+): Promise<Doc[]> {
+  return await findAll(document.class.Document, { parent: doc._id as Ref<Document> })
+}
+
 // eslint-disable-next-line @typescript-eslint/explicit-function-return-type
 export default async () => ({
   function: {
     DocumentHTMLPresenter: documentHTMLPresenter,
     DocumentTextPresenter: documentTextPresenter,
-    DocumentLinkIdProvider: documentLinkIdProvider
+    DocumentLinkIdProvider: documentLinkIdProvider,
+    FindChildDocuments: findChildDocuments
   }
 })