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Edit File: helpers.ts

import { sprintf } from 'sprintf-js';

/**
 * @returns {String} the string with all zeroes contained in a 
 */
export function spanAllZeroes(s: string): string {
 return s.replace(/(0+)/g, '$1');
}

/**
 * @returns {String} the string with each character contained in a 
 */
export function spanAll(s: string, offset: number = 0): string {
 const letters = s.split('');

return letters
 .map(
 (n, i) =>
 sprintf(
 '%s',
 n,
 i + offset,
 spanAllZeroes(n)
 ) // XXX Use #base-2 .value-0 instead?
 )
 .join('');
}

function spanLeadingZeroesSimple(group: string): string {
 return group.replace(/^(0+)/, '$1');
}

/**
 * @returns {String} the string with leading zeroes contained in a 
 */
export function spanLeadingZeroes(address: string): string {
 const groups = address.split(':');

return groups.map((g) => spanLeadingZeroesSimple(g)).join(':');
}

/**
 * Groups an address
 * @returns {String} a grouped address
 */
export function simpleGroup(addressString: string, offset: number = 0): string[] {
  const groups = addressString.split(':');

return groups.map((g, i) => {
    if (/group-v4/.test(g)) {
      return g;
    }

return sprintf(
 '%s',
 i + offset,
 spanLeadingZeroesSimple(g)
 );
 });
}

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