const internals = {
  kSplitterRegex: /.{1,8}/g,
  kGlyphs: ['☽', '☆', '♢', '♡', '╱', '╲', '╳', '〰', '▷', '⏊', '〒', '▢', '◯', '⏃', '⏀', '⏆']
};

// Return a glyph with color based on a 4 byte fragment of a UUIDv4
const getGlyphHashFragment = function (uuidFragment) {

  const glyphIndex = parseInt(uuidFragment.substring(0, 2), 16) % 16;
  return {
    glyph: internals.kGlyphs[glyphIndex],
    color: `#${uuidFragment.substring(2, 8)}`
  };
};

// Return an array of glyphs based on a UUIDv4
export const getGlyphHash = function (uuid) {

  const hashFragments = uuid.replace(/[-]/g, '').match(internals.kSplitterRegex);
  return hashFragments.map(getGlyphHashFragment);
};