Support optional label with one doc

src-ui/src/app/services/rest/document.service.spec.ts

@@ -329,6 +329,21 @@ describe(`DocumentService`, () => {
     })
   })
 
+  it('should include an optional label when merging one document as a version', () => {
+    const ids = [1, 2]
+    subscription = service
+      .mergeDocumentsAsVersions(ids, 2, 'Imported')
+      .subscribe()
+    const req = httpTestingController.expectOne(
+      `${environment.apiBaseUrl}${endpoint}/merge_as_versions/`
+    )
+    expect(req.request.body).toEqual({
+      documents: ids,
+      root_document_id: 2,
+      version_label: 'Imported',
+    })
+  })
+
   it('should call appropriate api endpoint for edit pdf', () => {
     const ids = [1]
     const args = { operations: [{ page: 1, rotate: 90, doc: 0 }] }

src-ui/src/app/services/rest/document.service.ts

@@ -374,10 +374,15 @@ export class DocumentService extends AbstractPaperlessService<Document> {
     })
   }
 
-  mergeDocumentsAsVersions(ids: number[], rootDocumentId: number) {
+  mergeDocumentsAsVersions(
+    ids: number[],
+    rootDocumentId: number,
+    versionLabel?: string
+  ) {
     return this.http.post(this.getResourceUrl(null, 'merge_as_versions'), {
       documents: ids,
       root_document_id: rootDocumentId,
+      ...(versionLabel ? { version_label: versionLabel } : {}),
     })
   }