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

@Pipe({
  name: 'round'
})
export class RoundPipe implements PipeTransform {

  /**
   * Round a value
   * @param value value to round
   * @param precision number of numbers to keep after coma - 1 if unspecified
   */
  transform(value: number, precision?: number): number {
    if (precision === undefined) {
      precision = 1;
    }
    const factor = Math.pow(10, precision);
    return Math.round(value * factor) / factor;
  }

}