<?php
  
  /**
   * This file is part of the Carbon package.
   *
   * (c) Brian Nesbitt <brian@nesbot.com>
   *
   * For the full copyright and license information, please view the LICENSE
   * file that was distributed with this source code.
   */
  
  use Carbon\CarbonImmutable;
  
  require_once __DIR__.'/vendor/autoload.php';
  
  function getMaxHistoryMonthsByAmount($amount): int
  {
      if ($amount >= 50) {
          return 6;
      }
  
      if ($amount >= 20) {
          return 4;
      }
  
      return 2;
  }
  
  function getHtmlAttribute($rawValue): string
  {
      return str_replace(
          ['​', "\r"],
          '',
          trim(htmlspecialchars((string) $rawValue), "  
  \r\t\v\0"),
      );
  }
  
  function getOpenCollectiveSponsors(): string
  {
      $customSponsorImages = [
          // For consistency and equity among sponsors, as of now, we kindly ask our sponsors
          // to provide an image having a width/height ratio between 1/1 and 2/1.
          // By default, we'll show the member picture from OpenCollective, and will resize it if bigger
          // int(OpenCollective.MemberId) => ImageURL
      ];
  
      $members = json_decode(file_get_contents('https://opencollective.com/carbon/members/all.json'), true);
  
      $list = array_filter($members, static function ($member): bool {
          return ($member['lastTransactionAmount'] > 3 || $member['isActive']) &&
              $member['role'] === 'BACKER' &&
              $member['type'] !== 'USER' &&
              (
                  $member['totalAmountDonated'] > 100 ||
                  $member['lastTransactionAt'] > CarbonImmutable::now()
                      ->subMonthsNoOverflow(getMaxHistoryMonthsByAmount($member['lastTransactionAmount']))
                      ->format('Y-m-d h:i') ||
                  $member['isActive'] && $member['lastTransactionAmount'] >= 30
              );
      });
  
      $list = array_map(static function (array $member): array {
          $createdAt = CarbonImmutable::parse($member['createdAt']);
          $lastTransactionAt = CarbonImmutable::parse($member['lastTransactionAt']);
  
          if ($createdAt->format('d H:i:s.u') > $lastTransactionAt->format('d H:i:s.u')) {
              $createdAt = $createdAt
                  ->setDay($lastTransactionAt->day)
                  ->modify($lastTransactionAt->format('H:i:s.u'));
          }
  
          $monthlyContribution = (float) ($member['totalAmountDonated'] / ceil($createdAt->floatDiffInMonths()));
  
          if (
              $lastTransactionAt->isAfter('last month') &&
              $member['lastTransactionAmount'] > $monthlyContribution
          ) {
              $monthlyContribution = (float) $member['lastTransactionAmount'];
          }
  
          $yearlyContribution = (float) ($member['totalAmountDonated'] / max(1, $createdAt->floatDiffInYears()));
          $status = null;
  
          if ($monthlyContribution > 29) {
              $status = 'sponsor';
          } elseif ($monthlyContribution > 4.5 || $yearlyContribution > 29) {
              $status = 'backer';
          } elseif ($member['totalAmountDonated'] > 0) {
              $status = 'helper';
          }
  
          return array_merge($member, [
              'star' => ($monthlyContribution > 98 || $yearlyContribution > 500),
              'status' => $status,
              'monthlyContribution' => $monthlyContribution,
              'yearlyContribution' => $yearlyContribution,
          ]);
      }, $list);
  
      usort($list, static function (array $a, array $b): int {
          return ($b['monthlyContribution'] <=> $a['monthlyContribution'])
              ?: ($b['totalAmountDonated'] <=> $a['totalAmountDonated']);
      });
  
      return implode('', array_map(static function (array $member) use ($customSponsorImages): string {
          $href = htmlspecialchars($member['website'] ?? $member['profile']);
          $src = $customSponsorImages[$member['MemberId'] ?? ''] ?? $member['image'] ?? (strtr($member['profile'], ['https://opencollective.com/' => 'https://images.opencollective.com/']).'/avatar/256.png');
          [$x, $y] = @getimagesize($src) ?: [0, 0];
          $validImage = ($x && $y);
          $src = $validImage ? htmlspecialchars($src) : 'https://opencollective.com/static/images/default-guest-logo.svg';
          $height = $member['status'] === 'sponsor' ? 64 : 42;
          $width = min($height * 2, $validImage ? round($x * $height / $y) : $height);
          $href .= (strpos($href, '?') === false ? '?' : '&amp;').'utm_source=opencollective&amp;utm_medium=github&amp;utm_campaign=Carbon';
          $title = getHtmlAttribute(($member['description'] ?? null) ?: $member['name']);
          $alt = getHtmlAttribute($member['name']);
  
          return "
  ".'<a title="'.$title.'" href="'.$href.'" target="_blank">'.
              '<img alt="'.$alt.'" src="'.$src.'" width="'.$width.'" height="'.$height.'">'.
              '</a>';
      }, $list))."
  ";
  }
  
  file_put_contents('readme.md', preg_replace_callback(
      '/(<!-- <open-collective-sponsors> -->)[\s\S]+(<!-- <\/open-collective-sponsors> -->)/',
      static function (array $match): string {
          return $match[1].getOpenCollectiveSponsors().$match[2];
      },
      file_get_contents('readme.md')
  ));