add stateHistory

.github/workflows/test.yml-template

@@ -0,0 +1,23 @@
+name: Test
+
+on:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [20.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm test

package.json

@@ -17,7 +17,7 @@
   "license": "GPL-3.0",
   "devDependencies": {
     "@mate-academy/eslint-config": "latest",
-    "@mate-academy/scripts": "^1.8.6",
+    "@mate-academy/scripts": "^2.1.3",
     "eslint": "^8.57.0",
     "eslint-plugin-jest": "^28.6.0",
     "eslint-plugin-node": "^11.1.0",

src/transformStateWithClones.js

@@ -1,13 +1,58 @@
 'use strict';
 
 /**
- * @param {Object} state
+ * @param {Object} cloneState
  * @param {Object[]} actions
  *
  * @return {Object[]}
  */
 function transformStateWithClones(state, actions) {
-  // write code here
+  const stateHistory = [];
+  const cloneState = Object.assign({}, state);
+
+  for (const act of actions) {
+    if (act.type === 'addProperties') {
+      Object.assign(cloneState, act.extraData);
+      stateHistory.push({ ...cloneState });
+    }
+
+    if (act.type === 'removeProperties') {
+      for (const k of act.keysToRemove) {
+        delete cloneState[k];
+      }
+      stateHistory.push({ ...cloneState });
+    }
+
+    if (act.type === 'clear') {
+      for (const key in cloneState) {
+        delete cloneState[key];
+      }
+      stateHistory.push({ ...cloneState });
+    }
+  }
+
+  return stateHistory;
 }
 
 module.exports = transformStateWithClones;
+
+const data = [
+  {
+    state: {
+      foo: 'bar',
+      bar: 'foo',
+      name: 'Jim',
+      hello: 'world',
+    },
+    actions: [
+      {
+        type: 'removeProperties',
+        keysToRemove: ['test', 'bar'],
+      },
+    ],
+  },
+];
+
+for (const i of data) {
+  transformStateWithClones(i.state, i.actions);
+}