Store display_rating in PlayerEvent

multi-skill/src/summary.rs

@@ -53,14 +53,14 @@ pub fn make_leaderboard(
         let max_rating = player
             .event_history
             .iter()
-            .map(PlayerEvent::get_display_rating)
+            .map(|event| event.display_rating)
             .max()
             .unwrap();
-        let display_rating = last_event.get_display_rating();
+        let display_rating = last_event.display_rating;
         let prev_rating = if num_contests == 1 {
             0
         } else {
-            player.event_history[num_contests - 2].get_display_rating()
+            player.event_history[num_contests - 2].display_rating
         };
         rating_data.push(PlayerSummary {
             rank: None,

multi-skill/src/systems/common/player.rs

@@ -9,6 +9,7 @@ pub struct PlayerEvent {
     pub rating_sig: i32,
     pub perf_score: i32,
     pub place: usize,
+    pub display_rating: i32,
 }
 
 impl PlayerEvent {
@@ -65,6 +66,8 @@ impl Player {
         last_event.rating_mu = rating.mu.round() as i32;
         last_event.rating_sig = rating.sig.round() as i32;
         last_event.perf_score = performance_score.round() as i32;
+
+        last_event.display_rating = last_event.get_display_rating();
     }
 
     pub fn update_rating_with_normal(&mut self, performance: Rating) {

worldrank-api/src/domain/history.rs

@@ -15,7 +15,7 @@ pub struct HistoryPoint {
 impl HistoryPoint {
     pub fn new(event: &PlayerEvent, contest: &ContestSummary) -> Self {
         Self {
-            display_rating: event.get_display_rating(),
+            display_rating: event.display_rating,
             perf_score: event.perf_score,
             place: event.place,
             num_contestants: contest.num_contestants,