Refactor backend and frontend modules for architecture alignment

front_zip/src/lib/format.ts

@@ -0,0 +1,58 @@
+export function formatBytes(bytes: number | null | undefined) {
+  if (bytes == null || Number.isNaN(bytes)) {
+    return '-';
+  }
+
+  if (bytes === 0) {
+    return '0 B';
+  }
+
+  const units = ['B', 'KB', 'MB', 'GB', 'TB'];
+  const index = Math.min(Math.floor(Math.log(bytes) / Math.log(1024)), units.length - 1);
+  const value = bytes / 1024 ** index;
+  const digits = value >= 10 || index === 0 ? 0 : 1;
+  return `${value.toFixed(digits)} ${units[index]}`;
+}
+
+export function formatDateTime(value: string | null | undefined) {
+  if (!value) {
+    return '-';
+  }
+
+  const date = new Date(value);
+  if (Number.isNaN(date.getTime())) {
+    return value;
+  }
+
+  return new Intl.DateTimeFormat('zh-CN', {
+    year: 'numeric',
+    month: '2-digit',
+    day: '2-digit',
+    hour: '2-digit',
+    minute: '2-digit',
+  }).format(date);
+}
+
+export function formatDate(value: string | null | undefined) {
+  if (!value) {
+    return '-';
+  }
+
+  const date = new Date(value);
+  if (Number.isNaN(date.getTime())) {
+    return value;
+  }
+
+  return new Intl.DateTimeFormat('zh-CN', {
+    year: 'numeric',
+    month: '2-digit',
+    day: '2-digit',
+  }).format(date);
+}
+
+export function formatPercent(value: number, total: number) {
+  if (!Number.isFinite(value) || !Number.isFinite(total) || total <= 0) {
+    return '0%';
+  }
+  return `${Math.min(100, Math.max(0, Math.round((value / total) * 100)))}%`;
+}