Track per-device traffic totals and recover inventory state

src/web/utils/format.js

@@ -10,6 +10,40 @@ export function formatBytes(value) {
   return `${size.toFixed(index === 0 ? 0 : 1)} ${units[index]}`;
 }
 
+const BYTE_STRING_PATTERN = /^\d+$/;
+
+export function byteString(value) {
+  const normalized = String(value ?? '0');
+  return BYTE_STRING_PATTERN.test(normalized) ? BigInt(normalized) : 0n;
+}
+
+export function formatByteString(value) {
+  const bytes = byteString(value);
+  const units = ['Б', 'КБ', 'МБ', 'ГБ', 'ТБ', 'ПБ', 'ЭБ'];
+  let unit = 0;
+  let divisor = 1n;
+  while (bytes >= divisor * 1024n && unit < units.length - 1) {
+    divisor *= 1024n;
+    unit += 1;
+  }
+  if (unit === 0) return `${bytes} ${units[unit]}`;
+  const tenths = (bytes * 10n + divisor / 2n) / divisor;
+  return `${tenths / 10n},${tenths % 10n} ${units[unit]}`;
+}
+
+export function sortDevicesByTraffic(devices, direction = 'desc') {
+  const factor = direction === 'asc' ? 1 : -1;
+  return (Array.isArray(devices) ? devices : [])
+    .map((device, index) => ({ device, index }))
+    .sort((left, right) => {
+      const leftTotal = byteString(left.device.uploadBytes) + byteString(left.device.downloadBytes);
+      const rightTotal = byteString(right.device.uploadBytes) + byteString(right.device.downloadBytes);
+      if (leftTotal === rightTotal) return left.index - right.index;
+      return (leftTotal < rightTotal ? -1 : 1) * factor;
+    })
+    .map(({ device }) => device);
+}
+
 export function formatRelative(iso) {
   if (!iso) return "";
   const ts = new Date(iso).getTime();