From f6fa4ca32d4c2c503846367eb5c435cd8d2961b5 Mon Sep 17 00:00:00 2001
From: Jesse McDonald <nybble41@gmail.com>
Date: Fri, 24 Apr 2020 23:36:02 -0500
Subject: [PATCH] keep earlier moves when unable to replay full game state

---
 js/pacosako_ui.js | 39 ++++++++++++++++++++++++---------------
 1 file changed, 24 insertions(+), 15 deletions(-)

diff --git a/js/pacosako_ui.js b/js/pacosako_ui.js
index 58558c6..b972b48 100644
--- a/js/pacosako_ui.js
+++ b/js/pacosako_ui.js
@@ -559,24 +559,33 @@ $(function (){
                debug('got board', moves);
 
                const newGame = new PS.Game();
-               for (const move of moves.past) {
-                  newGame.replayMove(move);
+
+               try {
+                  for (const move of moves.past) {
+                     newGame.replayMove(move);
+                  }
+
+                  let n = 0;
+
+                  try {
+                     for (const move of moves.future.slice().reverse()) {
+                        newGame.replayMove(move);
+                        n += 1;
+                     }
+                  } catch (err) {
+                     debug('Error replaying board redo state', err);
+                  }
+
+                  for (let i = 0; i < n; ++i) {
+                     newGame.undo();
+                  }
+               } catch (err) {
+                  debug('Error replaying board state', err);
                }
 
-               let n = 0;
-
-               for (const move of moves.future.slice().reverse()) {
-                  newGame.replayMove(move);
-                  n += 1;
-               }
-
-               for (let i = 0; i < n; ++i) {
-                  newGame.undo();
-               }
-
-               setCurrentGame(newGame, moves.past.length > currentGame.moves.length);
+               setCurrentGame(newGame, newGame.moves.length > currentGame.moves.length);
             } catch (err) {
-               debug('Error replaying board state', err);
+               debug('Error parsing board data', err);
             }
          }
       });