support for adding of partially existing nested keys

src/common/utils.test.ts

@@ -1,4 +1,4 @@
-import {containsHTMLTags, decodeBase64Unicode, deepEqual, encodeBase64Unicode, insertNestedKey, insertKey} from './utils'
+import {containsHTMLTags, decodeBase64Unicode, deepEqual, encodeBase64Unicode, insertNestedKey} from './utils'
 import {expect} from 'chai'
 
 describe('areObjectsEqual', () => {
@@ -38,18 +38,24 @@ describe('encode/decodeBase64Unicode', () => {
   })
 })
 
-describe('insertKey', () => {
+describe('insertNestedKey', () => {
   it('adds a new key in specified order to an object', () => {
     const dict = {x: '1', aa: '10', v: '3'}
     insertNestedKey(dict, 'z', 1)
     expect(JSON.stringify(dict)).to.eq(`{"x":"1","aa":"10","z":"","v":"3"}`)
   })
 
-  it('adds a new deep key, separated by dots', () => {
+  it('adds a new nested key, separated by dots', () => {
     const dict = {x: '1', aa: '10', v: '3'}
     insertNestedKey(dict, 'hello.world.baz', 1)
     expect(JSON.stringify(dict)).to.eq(`{"x":"1","aa":"10","hello":{"world":{"baz":""}},"v":"3"}`)
   })
+
+  it('adds a new deep key to existing sub keys', () => {
+    const dict = {x: {y: {z: '1'}}}
+    insertNestedKey(dict, 'x.y.zz', 1)
+    expect(JSON.stringify(dict)).to.eq(`{"x":{"y":{"z":"1","zz":""}}}`)
+  })
 })
 
 describe('containsHTMLTags', () => {

src/common/utils.ts

@@ -20,7 +20,7 @@ export function deepEqual(a: Record<string, any>, b: Record<string, any>): boole
   return JSON.stringify(a) == JSON.stringify(b)
 }
 
-export function insertKey(dict: Dict, key: string, afterPos: number, value: string|object = '') {
+function insertKey(dict: Dict, key: string, afterPos: number, value: string|object = '') {
   Object.assign(dict, Object.entries(dict).reduce((d: Dict, [k,v], i) => {
     delete dict[k]
     d[k] = v
@@ -31,6 +31,13 @@ export function insertKey(dict: Dict, key: string, afterPos: number, value: stri
 
 export function insertNestedKey(dict: Dict, deepKey: string, afterPos: number) {
   const keys = deepKey.split('.')
+  for (let key of [...keys]) {
+    if (dict[key]) {
+      dict = dict[key]
+      keys.shift()
+      afterPos = Object.keys(dict).length - 1
+    } else break
+  }
   let value: string|Dict = ''
   if (keys.length > 1) {
     let target: Dict = value = {}