Adds transfers between stores to external attachments

app/server/lib/ActiveDoc.ts

@@ -869,8 +869,12 @@ export class ActiveDoc extends EventEmitter {
           }
         }
       );
-      const userActions: UserAction[] = await Promise.all(
-        upload.files.map(file => this._prepAttachment(docSession, file)));
+      const userActions: UserAction[] = [];
+      // Process uploads sequentially to reduce risk of race conditions.
+      // Minimal performance impact due to the main async operation being serialized SQL queries.
+      for (const file of upload.files) {
+        userActions.push(await this._prepAttachment(docSession, file));
+      }
       const result = await this._applyUserActionsWithExtendedOptions(docSession, userActions, {
         attachment: true,
       });
@@ -943,6 +947,26 @@ export class ActiveDoc extends EventEmitter {
     return data;
   }
 
+  public async startTransferringAllAttachmentsToDefaultStore() {
+    const attachmentStoreId = (await this._getDocumentSettings()).attachmentStoreId;
+    // If no attachment store is set on the doc, it should transfer everything to internal storage
+    await this._attachmentFileManager.startTransferringAllFilesToOtherStore(attachmentStoreId);
+  }
+
+  /**
+   * Returns a summary of pending attachment transfers between attachment stores.
+   */
+  public attachmentTransferStatus() {
+    return this._attachmentFileManager.transferStatus();
+  }
+
+  /**
+   * Returns a summary of where attachments on this doc are stored.
+   */
+  public async attachmentLocationSummary() {
+    return await this._attachmentFileManager.locationSummary();
+  }
+
   /**
    * Fetches the meta tables to return to the client when first opening a document.
    */