From 492178c107e2ac2c148eec08ce738baf6b70ad78 Mon Sep 17 00:00:00 2001
From: Jarrett Ye <jarrett.ye@outlook.com>
Date: Mon, 12 Feb 2024 14:09:39 +0800
Subject: [PATCH] Fix/ignore revlogs before Forget entry (#3002)

* Fix/ignore revlogs before Forget entry

* Update weights.rs
---
 rslib/src/scheduler/fsrs/weights.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/rslib/src/scheduler/fsrs/weights.rs b/rslib/src/scheduler/fsrs/weights.rs
index 70ccd6f4c..3a7d09fe9 100644
--- a/rslib/src/scheduler/fsrs/weights.rs
+++ b/rslib/src/scheduler/fsrs/weights.rs
@@ -201,6 +201,15 @@ pub(crate) fn single_card_revlog_to_items(
             revlogs_complete = true;
         } else if last_learn_entry.is_some() {
             break;
+        // if we find the `Forget` entry before the `Learn` entry, we should
+        // ignore all the entries
+        } else if matches!(
+            (entry.review_kind, entry.ease_factor),
+            (RevlogReviewKind::Manual, 0)
+        ) && last_learn_entry.is_none()
+        {
+            revlogs_complete = false;
+            break;
         }
     }
     if !revlogs_complete {