From 92eeb8d749740ef4d6500dc59968e9310528eb02 Mon Sep 17 00:00:00 2001
From: YuLong Yao <feilongphone@gmail.com>
Date: Thu, 18 May 2023 17:29:46 +0800
Subject: [PATCH 1/3] Readme: add guiUndo action

---
 README.md | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/README.md b/README.md
index 4785900..19a008b 100644
--- a/README.md
+++ b/README.md
@@ -1469,6 +1469,32 @@ corresponding to when the API was available for use.
     ```
     </details>
 
+#### `guiUndo`
+
+*   Undo the last action / card; returns `true` if succeeded or `false` otherwise.
+
+    <details>
+    <summary><i>Sample request:</i></summary>
+
+    ```json
+    {
+        "action": "guiUndo",
+        "version": 6
+    }
+    ```
+    </details>
+
+    <details>
+    <summary><i>Sample result:</i></summary>
+
+    ```json
+    {
+        "result": true,
+        "error": null
+    }
+    ```
+    </details>
+
 #### `guiDeckOverview`
 
 *   Opens the *Deck Overview* dialog for the deck with the given name; returns `true` if succeeded or `false` otherwise.

From 53dba8003b1f48806bff55c06adc155c67627bd9 Mon Sep 17 00:00:00 2001
From: YuLong Yao <feilongphone@gmail.com>
Date: Thu, 18 May 2023 17:30:14 +0800
Subject: [PATCH 2/3] api: add guiUndo action

---
 plugin/__init__.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/plugin/__init__.py b/plugin/__init__.py
index a30fca0..73f4d81 100644
--- a/plugin/__init__.py
+++ b/plugin/__init__.py
@@ -1801,6 +1801,12 @@ class AnkiConnect:
         return True
 
 
+    @util.api()
+    def guiUndo(self):
+        self.window().undo()
+        return True
+
+
     @util.api()
     def guiDeckOverview(self, name):
         collection = self.collection()

From 5516e4826ce8937bf9a0d776ade93559ba4de9e7 Mon Sep 17 00:00:00 2001
From: YuLong Yao <feilongphone@gmail.com>
Date: Thu, 18 May 2023 17:30:18 +0800
Subject: [PATCH 3/3] test: add guiUndo action

---
 tests/test_graphical.py | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/tests/test_graphical.py b/tests/test_graphical.py
index cabcfea..6311bb4 100755
--- a/tests/test_graphical.py
+++ b/tests/test_graphical.py
@@ -102,6 +102,19 @@ class TestReviewActions:
         reviews_after = ac.cardReviews(deck="test_deck", startID=0)
         assert len(reviews_after) == len(reviews_before) + 1
 
+    def test_guiUndo(self, reviewing_started):
+        ac.guiShowAnswer()
+        reviews_before = ac.cardReviews(deck="test_deck", startID=0)
+        assert ac.guiAnswerCard(ease=4) is True
+
+        reviews_after_answer = ac.cardReviews(deck="test_deck", startID=0)
+        assert len(reviews_after_answer) == len(reviews_before) + 1
+
+        assert ac.guiUndo() is True
+
+        reviews_after_undo = ac.cardReviews(deck="test_deck", startID=0)
+        assert len(reviews_after_undo) == len(reviews_before)
+
 
 class TestSelectedNotes:
     def test_with_valid_deck_query(self, setup):