import/export data

utils/getFormattedDate.ts

@@ -0,0 +1,24 @@
+import { zeroPaddedString } from "./getFormattedNumber.ts";
+
+/**
+ * Returns a timestamp string to use for timestamped files
+ * @returns String of current datetime in YYYYMMDD-HHMMSS format
+ */
+const dateForFilename = (): string => {
+  const dt = new Date();
+  return `${dt.getFullYear()}${zeroPaddedString(
+    dt.getMonth() + 1,
+    2,
+    "before"
+  )}${zeroPaddedString(dt.getDate(), 2, "before")}-${zeroPaddedString(
+    dt.getHours(),
+    2,
+    "before"
+  )}${zeroPaddedString(dt.getMinutes(), 2, "before")}${zeroPaddedString(
+    dt.getSeconds(),
+    2,
+    "before"
+  )}`;
+};
+
+export { dateForFilename };

utils/getFormattedNumber.ts

@@ -0,0 +1,16 @@
+const zeroPaddedString = (
+  num: number,
+  requiredDigits: number,
+  position: "before" | "after"
+): string => {
+  if (num < 0) throw new RangeError("negative number");
+  if (requiredDigits < 0) throw new RangeError("invalid number of zeroes");
+  if (position !== "before" && position !== "after")
+    throw new TypeError("invalid position (before or after only)");
+
+  const requiredZeroes = requiredDigits - (num + "").replace(".", "").length;
+  const zeroes = "0".repeat(requiredZeroes);
+  return position === "before" ? "" + zeroes + num : "" + num + zeroes;
+};
+
+export { zeroPaddedString };