<?php
// Build the mapping array of hex unicode code point lists to shortnames.
// From Slack's emoji.json
// https://github.com/iamcal/emoji-data
// https://raw.githubusercontent.com/iamcal/emoji-data/master/emoji_pretty.json

$emoji_data = json_decode(file_get_contents('https://raw.githubusercontent.com/iamcal/emoji-data/master/emoji_pretty.json'), true);

$map = [];

$longest_emoji = 0;

foreach($emoji_data as $emoji) {
  $short_name = $emoji['short_name'];

  if(isset($emoji['non_qualified'])) {
    $map[$emoji['non_qualified']] = $short_name;
  }

  // Slack changed flag-de shortname to de, but we still want to keep flag-de
  // Most of the flag emojis are still flag-*, they only changed some of them
  if(isset($emoji['short_names']) && in_array('flag-'.$short_name, $emoji['short_names'])) {
    $short_name = 'flag-' . $short_name;
  }

  $map[$emoji['unified']] = $short_name;

  if(isset($emoji['variations'])) {
    foreach($emoji['variations'] as $var) {
      $map[$var] = $short_name;
    }
  }

  $len = count(explode('-', $short_name));
  $longest_emoji = max($longest_emoji, $len);

  if(isset($emoji['skin_variations'])) {
    foreach($emoji['skin_variations'] as $key=>$var) {

      $len = count(explode('-', $var['unified']));
      $longest_emoji = max($longest_emoji, $len);

      $map[$var['unified']] = $short_name;

      if(isset($var['non_qualified'])) {
        $map[$var['non_qualified']] = $short_name;
      }
    }
  }
}

echo "Longest Emoji: $longest_emoji\n";
$src = file_get_contents(__DIR__.'/../src/Emoji.php');
$src = preg_replace("/define\('LONGEST_EMOJI', (\d+)\);/", "define('LONGEST_EMOJI', ".$longest_emoji.");", $src);
file_put_contents(__DIR__.'/../src/Emoji.php', $src);

file_put_contents(__DIR__.'/../src/map.json', json_encode($map, JSON_PRETTY_PRINT));

$keys = array_keys($map);
usort($keys,function($a,$b){
    return strlen($b)-strlen($a);
});


$codepoints = [];
$baseCodepoints = [];
foreach($keys as $key) {
  $str = "";
  $parts = explode('-', $key);
  foreach($parts as $part) {
    $str .= mb_chr(hexdec($part));
  }
  $codepoints[] = $str;

  if(count($parts) == 1) {
    $baseCodepoints[] = mb_chr(hexdec($parts[0]));
  }
}
file_put_contents(__DIR__.'/../src/base-codepoints.json', json_encode($baseCodepoints));

echo "Found ".count($keys)." emoji\n";