From d8aa244a5aa9ed8fe02eb71f15415fdc53057bca Mon Sep 17 00:00:00 2001
From: user1823 <92206575+user1823@users.noreply.github.com>
Date: Sat, 27 Sep 2025 11:28:41 +0530
Subject: [PATCH] Export last_interval to Python (#4365)

* Export last_interval to Python

* Add last_interval field to StatsRevlogEntry

* Implement last_interval_secs function

* Update last_interval field type in stats.proto

* Update last_interval to use last_interval_secs
---
 proto/anki/stats.proto  | 2 ++
 rslib/src/revlog/mod.rs | 9 +++++++++
 rslib/src/stats/card.rs | 1 +
 3 files changed, 12 insertions(+)

diff --git a/proto/anki/stats.proto b/proto/anki/stats.proto
index a5639f841..1bd0fe630 100644
--- a/proto/anki/stats.proto
+++ b/proto/anki/stats.proto
@@ -37,6 +37,8 @@ message CardStatsResponse {
     uint32 ease = 5;
     float taken_secs = 6;
     optional cards.FsrsMemoryState memory_state = 7;
+    // seconds
+    uint32 last_interval = 8;
   }
   repeated StatsRevlogEntry revlog = 1;
   int64 card_id = 2;
diff --git a/rslib/src/revlog/mod.rs b/rslib/src/revlog/mod.rs
index f52698388..fbb9b459a 100644
--- a/rslib/src/revlog/mod.rs
+++ b/rslib/src/revlog/mod.rs
@@ -85,6 +85,15 @@ impl RevlogEntry {
         .unwrap()
     }
 
+    pub(crate) fn last_interval_secs(&self) -> u32 {
+        u32::try_from(if self.last_interval > 0 {
+            self.last_interval.saturating_mul(86_400)
+        } else {
+            self.last_interval.saturating_mul(-1)
+        })
+        .unwrap()
+    }
+
     /// Returns true if this entry represents a reset operation.
     /// These entries are created when a card is reset using
     /// [`Collection::reschedule_cards_as_new`].
diff --git a/rslib/src/stats/card.rs b/rslib/src/stats/card.rs
index a76edffa2..0dabff5e5 100644
--- a/rslib/src/stats/card.rs
+++ b/rslib/src/stats/card.rs
@@ -227,6 +227,7 @@ fn stats_revlog_entry(
         ease: entry.ease_factor,
         taken_secs: entry.taken_millis as f32 / 1000.,
         memory_state: None,
+        last_interval: entry.last_interval_secs(),
     }
 }