feat(server): synthetic root doc (#14794)

packages/backend/native/index.d.ts

@@ -26,6 +26,8 @@ export const AFFINE_PRO_LICENSE_AES_KEY: string | undefined | null
 
 export const AFFINE_PRO_PUBLIC_KEY: string | undefined | null
 
+export declare function buildPublicRootDoc(rootDocBin: Buffer, docMetas: Array<PublicDocMetaInput>): Buffer
+
 export interface Chunk {
   index: number
   content: string
@@ -120,6 +122,11 @@ export declare function parseWorkspaceDoc(docBin: Buffer): NativeWorkspaceDocCon
 
 export declare function processImage(input: Buffer, maxEdge: number, keepExif: boolean): Promise<Buffer>
 
+export interface PublicDocMetaInput {
+  id: string
+  title?: string
+}
+
 export declare function readAllDocIdsFromRootDoc(docBin: Buffer, includeTrash?: boolean | undefined | null): Array<string>
 
 /**

packages/backend/native/src/doc.rs

@@ -54,6 +54,12 @@ impl From<WorkspaceDocContent> for NativeWorkspaceDocContent {
   }
 }
 
+#[napi(object)]
+pub struct PublicDocMetaInput {
+  pub id: String,
+  pub title: Option<String>,
+}
+
 #[napi(object)]
 pub struct NativeBlockInfo {
   pub block_id: String,
@@ -254,6 +260,19 @@ pub fn add_doc_to_root_doc(root_doc_bin: Buffer, doc_id: String, title: Option<S
   Ok(Buffer::from(result))
 }
 
+#[napi]
+pub fn build_public_root_doc(root_doc_bin: Buffer, doc_metas: Vec<PublicDocMetaInput>) -> Result<Buffer> {
+  let metas = doc_metas
+    .iter()
+    .map(|meta| (meta.id.as_str(), meta.title.as_deref()))
+    .collect::<Vec<_>>();
+  let result = map_napi_err(
+    doc_parser::build_public_root_doc(&root_doc_bin, &metas),
+    Status::GenericFailure,
+  )?;
+  Ok(Buffer::from(result))
+}
+
 /// Updates a document title in the workspace root doc's meta.pages array.
 ///
 /// # Arguments