Carry counts.bytes through tree response transformers

Author: ErykKul

src/datasets/domain/models/FileTreeNode.ts

@@ -8,8 +8,18 @@ export interface FileTreeFolderNode {
   name: string
   path: string
   counts?: {
+    /** Total files anywhere in the folder's subtree (recursive). */
     files: number
+    /** Immediate subfolders only. */
     folders: number
+    /**
+     * Total size of all files in the subtree, in bytes. Uses the
+     * default-form file size — for ingested tabular files that's the
+     * converted TSV, not the original. Intended as a UX hint
+     * ("downloading this folder = N GB"); not authoritative under
+     * `originals=true`.
+     */
+    bytes: number
   }
 }
 

src/datasets/infra/repositories/transformers/fileTreeTransformers.ts

@@ -11,7 +11,7 @@ interface FolderItemPayload {
   type: 'folder'
   name: string
   path: string
-  counts?: { files: number; folders: number }
+  counts?: { files: number; folders: number; bytes: number }
 }
 
 interface FileItemPayload {

test/unit/datasets/ListDatasetTreeNode.test.ts

@@ -16,7 +16,7 @@ describe('ListDatasetTreeNode (unit)', () => {
         type: FileTreeNodeType.FOLDER,
         name: 'sub',
         path: 'data/sub',
-        counts: { files: 1, folders: 0 }
+        counts: { files: 1, folders: 0, bytes: 1024 }
       },
       {
         type: FileTreeNodeType.FILE,

test/unit/datasets/fileTreeTransformers.test.ts

@@ -21,7 +21,12 @@ describe('transformTreeResponseToFileTreePage', () => {
     const response = buildResponse({
       path: 'data',
       items: [
-        { type: 'folder', name: 'raw', path: 'data/raw', counts: { files: 3, folders: 0 } },
+        {
+          type: 'folder',
+          name: 'raw',
+          path: 'data/raw',
+          counts: { files: 3, folders: 0, bytes: 4096 }
+        },
         {
           type: 'file',
           id: 42,
@@ -55,7 +60,7 @@ describe('transformTreeResponseToFileTreePage', () => {
       throw new Error('expected folder')
     }
     expect(folder.name).toBe('raw')
-    expect(folder.counts).toEqual({ files: 3, folders: 0 })
+    expect(folder.counts).toEqual({ files: 3, folders: 0, bytes: 4096 })
 
     const file = page.items[1]
     if (!isFileTreeFileNode(file)) {