git.r.bdr.sh - rbdr/forum/blob - app/utils/glyph_hash.js

   1 const internals = {
   2   kSplitterRegex: /.{1,8}/g,
   3   kGlyphs: [
   4     '☽',
   5     '☆',
   6     '♢',
   7     '♡',
   8     '╱',
   9     '╲',
  10     '╳',
  11     '〰',
  12     '▷',
  13     '⏊',
  14     '〒',
  15     '▢',
  16     '◯',
  17     '⏃',
  18     '⏀',
  19     '⏆'
  20   ]
  21 };
  22
  23 // Return a glyph with color based on a 4 byte fragment of a UUIDv4
  24 const getGlyphHashFragment = function (uuidFragment) {
  25
  26   const glyphIndex = parseInt(uuidFragment.substring(0,2), 16) % 16;
  27   return {
  28     glyph: internals.kGlyphs[glyphIndex],
  29     color: `#${uuidFragment.substring(2,8)}`
  30   };
  31 };
  32
  33 // Return an array of glyphs based on a UUIDv4
  34 export const getGlyphHash = function (uuid) {
  35
  36   const hashFragments = uuid.match(internals.kSplitterRegex);
  37   return hashFragments.map(getGlyphHashFragment);
  38 };