add game record display overflow canvas for moves made at previously played points

packages/play-node-go/src/components/GameUI/Menu/Menu.js

@@ -8,8 +8,14 @@ const Menu = ({ showMenu, clickClose, ...props }) => {
     if (e.target.className === "Game__Menu-container") clickClose();
   };
   const canvasRef = useRef();
+  const overflowRef = useRef();
   const drawGameRecord = () => {
-    return <canvas ref={canvasRef} />;
+    return (
+      <>
+        <canvas ref={canvasRef} />
+        <canvas ref={overflowRef} />
+      </>
+    );
   };
 
   useEffect(() => {
@@ -35,7 +41,49 @@ const Menu = ({ showMenu, clickClose, ...props }) => {
       ctx.stroke();
     }
     if (!meta?.gameRecord) return;
-    meta.gameRecord.forEach(({ player, pos }, index) => {
+    ctx.textAlign = "center";
+    ctx.textBaseline = "middle";
+    const { overflow } = meta.gameRecord.reduce(
+      (dict, { player, pos }, index) => {
+        const past = dict[`${pos.x}-${pos.y}`];
+        if (past) {
+          // overflow: [ { move:#, player:'color', subsequentMoves: [ { move: #, player: 'color' } ] } ]
+          if (dict.overflow) {
+            const indexOfPrior = dict.overflow.findIndex(
+              ({ move }) => move === past
+            );
+            if (indexOfPrior !== -1) {
+              // if multiple past moves at this point exist
+              dict.overflow[indexOfPrior].subsequentMoves.push({
+                move: index + 1,
+                player,
+              });
+              return dict;
+            }
+            // if a second move at this point has not yet been encountered
+            // prior move will be black if no active handicap and move is odd or if active handicap and move is even
+            const playerPrior =
+              (active.handicap && !(past % 2)) || past % 2 ? "black" : "white";
+            return {
+              ...dict,
+              overflow: [
+                ...dict.overflow,
+                {
+                  move: past,
+                  player: playerPrior,
+                  subsequentMoves: [{ move: index + 1, player }],
+                },
+              ],
+            };
+          }
+          // if no move has yet been encountered at a previously made move
+          return {
+            ...dict,
+            overflow: [
+              { move: past, subsequentMoves: [{ move: index + 1, player }] },
+            ],
+          };
+        }
         ctx.beginPath();
         ctx.arc(
           (pos.y - 1) * space + offset,
@@ -49,15 +97,67 @@ const Menu = ({ showMenu, clickClose, ...props }) => {
         ctx.fillStyle = player === "white" ? "#fff" : "#000";
         ctx.fill();
         ctx.fillStyle = player === "white" ? "#000" : "#fff";
-      ctx.textAlign = "center";
-      ctx.textBaseline = "middle";
+
         ctx.fillText(
           index + 1,
           (pos.y - 1) * space + offset,
           (pos.x - 1) * space + offset
         );
+        return { ...dict, [`${pos.x}-${pos.y}`]: index + 1 };
+      },
+      {}
+    );
+    if (!overflow?.length) return;
+    // Draw Overflow Moves (moves made at prior points)
+    const canvas2 = overflowRef.current;
+    const ctx2 = canvas2.getContext("2d");
+    canvas2.width = scale;
+    canvas2.height = space * overflow.length;
+    ctx2.textAlign = "center";
+    ctx2.textBaseline = "middle";
+    overflow.forEach(({ move, subsequentMoves, player }, index) => {
+      subsequentMoves.forEach(({ player, move }, subIndex) => {
+        ctx2.beginPath();
+        ctx2.arc(
+          subIndex * space + offset,
+          index * space + offset,
+          offset * 0.95,
+          0,
+          Math.PI * 2,
+          true
+        );
+        ctx2.stroke();
+        ctx2.fillStyle = player === "white" ? "#fff" : "#000";
+        ctx2.fill();
+        ctx2.fillStyle = player === "white" ? "#000" : "#fff";
+        ctx2.fillText(move, subIndex * space + offset, index * space + offset);
       });
-  }, [showMenu, meta]);
+      ctx2.fillStyle = "#000";
+      ctx2.fillText(
+        "at",
+        subsequentMoves.length * space + offset,
+        index * space + offset
+      );
+      ctx2.fillStyle = player === "white" ? "#fff" : "#000";
+      ctx2.beginPath();
+      ctx2.arc(
+        (subsequentMoves.length + 1) * space + offset,
+        index * space + offset,
+        offset * 0.95,
+        0,
+        Math.PI * 2,
+        true
+      );
+      ctx2.fill();
+      ctx2.stroke();
+      ctx2.fillStyle = player === "white" ? "#000" : "#fff";
+      ctx2.fillText(
+        move,
+        (subsequentMoves.length + 1) * space + offset,
+        index * space + offset
+      );
+    });
+  }, [showMenu, meta, active.handicap, boardSize]);
 
   return (
     <div
@@ -68,7 +168,6 @@ const Menu = ({ showMenu, clickClose, ...props }) => {
         <button onClick={clickClose}>X</button>
         <div className="Game__Menu__game-record-container">
           {drawGameRecord()}
-          <div className="Game__Menu__game-record-overflow"></div>
         </div>
       </div>
     </div>

packages/play-node-go/src/components/GameUI/Menu/Menu.scss

@@ -5,6 +5,7 @@ div.Game__Menu-container {
 
   background: rgba(0,0,0,0.5);
   display: flex;
+  flex-flow: column nowrap;
   justify-content: center;
   align-items: center;
   height: 100vh;
@@ -14,8 +15,10 @@ div.Game__Menu-container {
   
   .Game__Menu-container__Menu {
     background: #eef;
-    width: 80vw;
-    min-height: 20vh;
+    max-height: 90vh;
+    max-width: 80vw;
+    padding: 2vh;
+    overflow: scroll;
   }
 
   div.Game__Menu__game-record-container {