Fix: get files by path depth (#2993)

* fix: get files up to depth specified by colletion path

* test(e2e): update mock data

* chore: fix comment

packages/netlify-cms-lib-util/src/__tests__/backendUtil.spec.js

@@ -1,5 +1,6 @@
-import { parseLinkHeader, getAllResponses } from '../backendUtil';
+import { parseLinkHeader, getAllResponses, getCollectionDepth } from '../backendUtil';
 import { oneLine } from 'common-tags';
+import { Map } from 'immutable';
 import nock from 'nock';
 
 describe('parseLinkHeader', () => {
@@ -69,3 +70,13 @@ describe('getAllResponses', () => {
     expect(pages[2]).toHaveLength(10);
   });
 });
+
+describe('getCollectionDepth', () => {
+  it('should return 1 for collection with no path', () => {
+    expect(getCollectionDepth(Map({}))).toBe(1);
+  });
+
+  it('should return 2 for collection with path of one nested folder', () => {
+    expect(getCollectionDepth(Map({ path: '{{year}}/{{slug}}' }))).toBe(2);
+  });
+});

packages/netlify-cms-lib-util/src/backendUtil.js

@@ -77,3 +77,8 @@ export const getAllResponses = async (url, options = {}, linkHeaderRelName = 'ne
 
   return pageResponses;
 };
+
+export const getCollectionDepth = collection => {
+  const depth = collection.get('path', '').split('/').length;
+  return depth;
+};

packages/netlify-cms-lib-util/src/index.js

@@ -18,6 +18,7 @@ import {
   parseLinkHeader,
   parseResponse,
   responseParser,
+  getCollectionDepth,
 } from './backendUtil';
 import loadScript from './loadScript';
 import getBlobSHA from './getBlobSHA';
@@ -46,6 +47,7 @@ export const NetlifyCmsLibUtil = {
   responseParser,
   loadScript,
   getBlobSHA,
+  getCollectionDepth,
 };
 export {
   APIError,
@@ -73,4 +75,5 @@ export {
   getBlobSHA,
   asyncLock,
   isAbsolutePath,
+  getCollectionDepth,
 };