1 files changed, 16 insertions, 0 deletions
diff --git a/src/lib/helpers.ts b/src/lib/helpers.ts
new file mode 100644
index 0000000..673c8fb
--- /dev/null
+++ b/src/lib/helpers.ts
@@ -0,0 +1,16 @@
+import type { Coord } from "./Sudoku";
+
+export function getNewCoord(direction: string, curCoords: Coord) {
+  let { x, y } = curCoords;
+  if (direction === "up")
+    x === 0 ? x = 8 : x--;
+  else if (direction === "down")
+    x === 8 ? x = 0 : x++;
+  else if (direction === "right")
+    y === 8 ? y = 0 : y++;
+  else if (direction === "left")
+    y === 0 ? y = 8 : y--;
+  else
+    throw new Error("getNewCoord(): bad direction")
+  return { x, y }
+}