From aecff39b6f3cca846d9dc10636f85aee6425b161 Mon Sep 17 00:00:00 2001
From: Jarrett Ye <jarrett.ye@outlook.com>
Date: Mon, 28 Jul 2025 14:15:43 +0800
Subject: [PATCH] replace `days_since_last_review` with
 `seconds_since_last_review`

---
 rslib/src/browser_table.rs               | 17 -----------------
 rslib/src/stats/graphs/retrievability.rs |  6 +++---
 2 files changed, 3 insertions(+), 20 deletions(-)

diff --git a/rslib/src/browser_table.rs b/rslib/src/browser_table.rs
index fffea69ce..4b6ff920e 100644
--- a/rslib/src/browser_table.rs
+++ b/rslib/src/browser_table.rs
@@ -127,23 +127,6 @@ impl Card {
 
     /// This uses card.due and card.ivl to infer the elapsed time. If 'set due
     /// date' or an add-on has changed the due date, this won't be accurate.
-    pub(crate) fn days_since_last_review(&self, timing: &SchedTimingToday) -> Option<u32> {
-        if let Some(last_review_time) = self.last_review_time {
-            Some(timing.next_day_at.elapsed_days_since(last_review_time) as u32)
-        } else if !self.is_due_in_days() {
-            Some(
-                (timing.next_day_at.0 as u32).saturating_sub(self.original_or_current_due() as u32)
-                    / 86_400,
-            )
-        } else {
-            self.due_time(timing).map(|due| {
-                (due.adding_secs(-86_400 * self.interval as i64)
-                    .elapsed_secs()
-                    / 86_400) as u32
-            })
-        }
-    }
-
     pub(crate) fn seconds_since_last_review(&self, timing: &SchedTimingToday) -> Option<u32> {
         if let Some(last_review_time) = self.last_review_time {
             Some(timing.now.elapsed_secs_since(last_review_time) as u32)
diff --git a/rslib/src/stats/graphs/retrievability.rs b/rslib/src/stats/graphs/retrievability.rs
index 94f4d6bc9..6881a6062 100644
--- a/rslib/src/stats/graphs/retrievability.rs
+++ b/rslib/src/stats/graphs/retrievability.rs
@@ -30,10 +30,10 @@ impl GraphsContext {
                 .or_insert((0.0, 0));
             entry.1 += 1;
             if let Some(state) = card.memory_state {
-                let elapsed_days = card.days_since_last_review(&timing).unwrap_or_default();
-                let r = fsrs.current_retrievability(
+                let elapsed_seconds = card.seconds_since_last_review(&timing).unwrap_or_default();
+                let r = fsrs.current_retrievability_seconds(
                     state.into(),
-                    elapsed_days,
+                    elapsed_seconds,
                     card.decay.unwrap_or(FSRS5_DEFAULT_DECAY),
                 );