client/src/utils/playUndo.js

   1 export function playMove(move, vr) {
   2   if (!Array.isArray(move)) move = [move];
   3   move.forEach(m => vr.play(m));
   4 }
   5
   6 export function undoMove(move, vr) {
   7   if (!Array.isArray(move)) move = [move];
   8   // If multi-move, undo all submoves from last to first
   9   for (let i = move.length - 1; i >= 0; i--)
  10     vr.undo(move[i]);
  11 }
  12
  13 export function getFilteredMove(move) {
  14   if (!Array.isArray(move)) move = [move];
  15   const filtered_move = move.map(m => {
  16     return {
  17       appear: m.appear,
  18       vanish: m.vanish,
  19       start: m.start,
  20       end: m.end
  21     };
  22   });
  23   return filtered_move.length == 1 ? filtered_move[0] : filtered_move;
  24 }