Merge pull request #794 from isucon/fix-fe-progress

[FE] currentが直線距離から外れたり目的地と現在地が同じ場合に異常値になるのを修正

frontend/app/components/modules/simulator-configs/simulator-chair-config.tsx

@@ -17,13 +17,21 @@ const progress = (
   current: Coordinate,
   end: Coordinate,
 ): number => {
-  const distance =
+  const startToEnd =
     Math.abs(end.latitude - start.latitude) +
     Math.abs(end.longitude - start.longitude);
-  const progress =
+  if (startToEnd === 0) {
+    return 100;
+  }
+  const currentToEnd =
     Math.abs(end.latitude - current.latitude) +
     Math.abs(end.longitude - current.longitude);
-  return Math.floor(((distance - progress) / distance) * 100);
+  return Math.floor(
+    Math.max(
+      Math.min(((startToEnd - currentToEnd) / startToEnd) * 100, 100),
+      0,
+    ),
+  );
 };
 
 const ChairProgress: FC<{