Dave Jarvis' Repositories

<?php
class RepositoryList {
  private $reposPath;

  public function __construct($path) {
    $this->reposPath = $path;
  }

  public function eachRepository(callable $callback) {
    $repos = [];
    $dirs = glob($this->reposPath . '/*', GLOB_ONLYDIR);

    if ($dirs === false) return;

    foreach ($dirs as $dir) {
      $basename = basename($dir);
      if ($basename[0] === '.') continue;

      $repos[$basename] = [
        'name' => $basename,
        'safe_name' => $basename,
        'path' => $dir
      ];
    }

    $this->sortRepositories($repos);

    foreach ($repos as $repo) {
      $callback($repo);
    }
  }

  private function sortRepositories(array &$repos) {
    $orderFile = __DIR__ . '/order.txt';

    if (!file_exists($orderFile)) {
      ksort($repos, SORT_NATURAL | SORT_FLAG_CASE);
      return;
    }

    $lines = file($orderFile, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
    $order = array_flip(array_map('trim', $lines));

    uasort($repos, function($a, $b) use ($order) {
      $nameA = $a['safe_name'];
      $nameB = $b['safe_name'];

      $posA = $order[$nameA] ?? PHP_INT_MAX;
      $posB = $order[$nameB] ?? PHP_INT_MAX;

      if ($posA === $posB) {
        return strcasecmp($nameA, $nameB);
      }

      return $posA <=> $posB;
    });
  }
}