fbmobile/lib/core/util/formatter_util.dart

import 'dart:math';

import 'package:intl/intl.dart';

class FormatterUtil {
  /// Format epoch timestamp
  static String formatEpoch(num millis) {
    DateFormat dateFormat = DateFormat().add_yMEd().add_Hm();
    return dateFormat
        .format(DateTime.fromMillisecondsSinceEpoch(millis as int));
  }

  static String formatBytes(int bytes, int decimals) {
    if (bytes <= 0) return "0 B";
    const suffixes = ["B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"];
    var i = (log(bytes) / log(1024)).floor();
    return '${(bytes / pow(1024, i)).toStringAsFixed(decimals)} ${suffixes[i]}';
  }
}