refactor: 重构helpers目录导出入口，整合原有分散的模块导出

src/helpers/device/switch/index.ts

@@ -0,0 +1 @@
+export * from './util';

src/helpers/device/switch/util.ts

@@ -0,0 +1,26 @@
+import type { NdmSwitchPortInfo } from '@/apis';
+
+export const getPortStatusValue = (portInfo: NdmSwitchPortInfo): string => {
+  const { upDown } = portInfo;
+  return upDown === 1 ? '已连接' : upDown === 2 ? '未连接' : '-';
+};
+
+export const transformPortSpeed = (portInfo: NdmSwitchPortInfo, type: 'in' | 'out' | 'total'): string => {
+  const units = ['b/s', 'Kb/s', 'Mb/s', 'Gb/s', 'Tb/s'];
+  const { inFlow, outFlow, flow } = portInfo;
+  let result: number = 0;
+  if (type === 'in') {
+    result = inFlow;
+  } else if (type === 'out') {
+    result = outFlow;
+  } else if (type === 'total') {
+    result = flow;
+  }
+  let unit = 0;
+  result *= 8;
+  while (result >= 1024 && unit < units.length - 1) {
+    result /= 1024;
+    unit++;
+  }
+  return `${result.toFixed(3)} ${units[unit]}`;
+};