display library disk usage (#976)

enjoy/src/utils.ts

@@ -127,3 +127,24 @@ export const convertIpaToNormal = (
     return converted;
   }
 };
+
+// make size of bytes human readable
+export const humanFileSize = (bytes: number, si: boolean = false) => {
+  const thresh = si ? 1000 : 1024;
+  if (Math.abs(bytes) < thresh) {
+    return bytes + " B";
+  }
+  const units = si
+    ? ["kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"]
+    : ["KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"];
+  let u = -1;
+  const r = 10;
+  do {
+    bytes /= thresh;
+    ++u;
+  } while (
+    Math.round(Math.abs(bytes) * r) / r >= thresh &&
+    u < units.length - 1
+  );
+  return bytes.toFixed(1) + " " + units[u];
+};