+ chart leaderboard caching

scripts/songselect/songwheel.lua

@@ -122,6 +122,7 @@ local top50diffs = {}
 local irRequestStatus = 1; -- 0=unused, 1=not requested, 2=loading, others are status codes
 local irRequestTimeout = 2
 local irLeaderboard = {}
+local irLeaderboardsCache = {}
 
 local transitionScrollScale = 0;
 local transitionScrollOffsetY = 0;
@@ -578,6 +579,7 @@ function drawIrLeaderboard()
     end
 
     if #irLeaderboard == 0 then
+        gfx.Text("This chart has no scores", scoreBoardX + (sbBarWidth / 2), scoreBoardY + sbBarHeight/2);
         return;
     end
 
@@ -667,7 +669,7 @@ function drawSearch()
     gfx.Text(songwheel.searchText, desw-200, 30);
 end
 
-function refreshIrLeaderboard()
+function refreshIrLeaderboard(deltaTime)
     if irRequestStatus ~= 1 then -- Only continue if the leaderboard is requesteded, but not loading or loaded.
         return
     end
@@ -680,6 +682,17 @@ function refreshIrLeaderboard()
         return;
     end
 
+    if (irLeaderboardsCache[diff.hash]) then
+        irLeaderboard = irLeaderboardsCache[diff.hash];
+        irRequestStatus = 20;
+        return;
+    end
+
+    if (irRequestTimeout > 0) then
+        irRequestTimeout = irRequestTimeout - deltaTime
+        return;
+    end
+
     irRequestStatus = 2; -- Loading
     -- onIrLeaderboardFetched({
     --     statusCode = 20,
@@ -711,6 +724,10 @@ function onIrLeaderboardFetched(res)
             irLeaderboard[tempScore.ranking] = tempScore
         end
 
+        local song = songwheel.songs[selectedIndex];
+        local diff = song and song.difficulties[selectedDifficulty] or false;
+        irLeaderboardsCache[diff.hash] = irLeaderboard;
+
         game.Log(dump(irLeaderboard), game.LOGGER_ERROR)
     else
         game.Log("IR error " .. res.statusCode, game.LOGGER_ERROR)
@@ -921,11 +938,7 @@ render = function (deltaTime)
 
     draw_songwheel((resX - fullX) / 2, 0, fullX, fullY, deltaTime);
 
-    if (irRequestTimeout < 0) then
+    refreshIrLeaderboard(deltaTime);
-        refreshIrLeaderboard(); -- For explantion, check where isIrLeaderboardRequested is defined
-    else
-        irRequestTimeout = irRequestTimeout - deltaTime
-    end
 end
 
 songs_changed = function (withAll)