Add file size formating

src/services/file_size_format/file_size_format.js

@@ -0,0 +1,17 @@
+const fileSizeFormat = (num, t) => {
+  var exponent
+  var unit
+  var units = [t('file_size_units.B'), t('file_size_units.KB'), t('file_size_units.MB'), t('file_size_units.GB'), t('file_size_units.TB')]
+  if (num < 1) {
+    return num + ' ' + units[0]
+  }
+
+  exponent = Math.min(Math.floor(Math.log(num) / Math.log(1000)), units.length - 1)
+  num = (num / Math.pow(1000, exponent)).toFixed(2) * 1
+  unit = units[exponent]
+  return num + ' ' + unit
+}
+const fileSizeFormatService = {
+  fileSizeFormat
+}
+export default fileSizeFormatService