From 4a2070ca13500684ae717743a89abe75342dc0f2 Mon Sep 17 00:00:00 2001
From: shikoryak <oksanashykoriak@gmail.com>
Date: Fri, 4 Aug 2023 14:18:55 +0300
Subject: [PATCH 1/4] add solution

---
 src/transformState.js | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/transformState.js b/src/transformState.js
index a1eaa0640..a3f35b32c 100644
--- a/src/transformState.js
+++ b/src/transformState.js
@@ -5,7 +5,27 @@
  * @param {Object[]} actions
  */
 function transformState(state, actions) {
-  // write code here
+  // const result = [];
+  // let newState = { ...state };
+
+  for (const action of actions) {
+    switch (action.type) {
+      case 'addProperties':
+        Object.assign(state, action.extraData);
+        break;
+
+      case 'removeProperties':
+        for (const key of action.keysToRemove) {
+          delete state[key];
+        }
+        break;
+
+      default:
+        for (const key in state) {
+          delete state[key];
+        }
+    }
+  }
 }
 
 module.exports = transformState;

From 8f2efa576ff0b9e9dc92edc151d901dab5e8f5a5 Mon Sep 17 00:00:00 2001
From: shikoryak <oksanashykoriak@gmail.com>
Date: Fri, 4 Aug 2023 14:21:48 +0300
Subject: [PATCH 2/4] remove commented code

---
 src/transformState.js | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/src/transformState.js b/src/transformState.js
index a3f35b32c..d1db0c508 100644
--- a/src/transformState.js
+++ b/src/transformState.js
@@ -5,9 +5,6 @@
  * @param {Object[]} actions
  */
 function transformState(state, actions) {
-  // const result = [];
-  // let newState = { ...state };
-
   for (const action of actions) {
     switch (action.type) {
       case 'addProperties':

From 533612b7d27af9299e5fbe999b19934a0cf857ae Mon Sep 17 00:00:00 2001
From: shikoryak <oksanashykoriak@gmail.com>
Date: Fri, 4 Aug 2023 14:44:07 +0300
Subject: [PATCH 3/4] added case for delete

---
 src/transformState.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/transformState.js b/src/transformState.js
index d1db0c508..a0365e2b9 100644
--- a/src/transformState.js
+++ b/src/transformState.js
@@ -17,7 +17,7 @@ function transformState(state, actions) {
         }
         break;
 
-      default:
+      case 'clear':
         for (const key in state) {
           delete state[key];
         }

From 6cd84fccb4016a77e4777458226d07086d476ccd Mon Sep 17 00:00:00 2001
From: shikoryak <oksanashykoriak@gmail.com>
Date: Fri, 4 Aug 2023 16:09:38 +0300
Subject: [PATCH 4/4] added case for delete

---
 src/transformState.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/transformState.js b/src/transformState.js
index a0365e2b9..1b5dc1f94 100644
--- a/src/transformState.js
+++ b/src/transformState.js
@@ -21,6 +21,10 @@ function transformState(state, actions) {
         for (const key in state) {
           delete state[key];
         }
+        break;
+
+      default:
+        throw new Error(`Action type ${action.type} is not valid.`);
     }
   }
 }