refactor: Migrate the project functionality and optimize the code structure

src/utils/common.ts

@@ -0,0 +1,39 @@
+import dayjs from 'dayjs'
+
+export const bytesToSize = (
+  bytes: number | string | undefined | null,
+  decimals = 2,
+) => {
+  if (typeof bytes === 'undefined' || bytes === null) {
+    bytes = 0
+  }
+  if (typeof bytes === 'string') {
+    bytes = Number(bytes)
+  }
+  if (Number.isNaN(bytes)) {
+    return 'Unknown'
+  }
+  if (bytes === 0) {
+    return '0 Bytes'
+  }
+  const k = 1024
+  const dm = decimals < 0 ? 0 : decimals
+  const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']
+  const i = Math.floor(Math.log(bytes) / Math.log(k))
+  return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i]
+}
+
+export const formatDate = (date: number | string | Date) => {
+  return dayjs(date).format('YYYY-MM-DD HH:mm:ss')
+}
+
+export const previewUrlToFile = async (url: string) => {
+  return fetch(url)
+    .then((res) => res.blob())
+    .then((blob) => {
+      const type = blob.type
+      const extension = type.split('/')[1]
+      const file = new File([blob], `preview.${extension}`, { type })
+      return file
+    })
+}