import { Pipe, PipeTransform } from '@angular/core';

@Pipe({
  name: 'convertSizeToString'
})
export class ConvertSizeToStringPipe implements PipeTransform {

  /**
   * Convert size to human readable size
   * @param size size in byte
   */
  transform(size: number): any {
    const units = ['Bytes', 'KiB', 'MiB', 'GiB', 'TiB'];

    if (size === 0) {
      return '0 Byte';
    }

    const i = Math.floor(Math.log(size) / Math.log(1024));
    let calcSize = size / Math.pow(1024, i);
    calcSize = Math.round(calcSize * 100) / 100;

    return calcSize + ' ' + units[i];
  }

}