Dave Jarvis' Repositories

<?php
require_once 'Views.php';
require_once 'RepositoryList.php';
require_once 'Git.php';
require_once 'GitDiff.php';
require_once 'DiffPage.php';

class Router {
  private $repositories = [];
  private $git;

  public function __construct(string $reposPath) {
    $this->git = new Git($reposPath);

    $list = new RepositoryList($reposPath);
    $list->eachRepository(function($repo) {
      $this->repositories[] = $repo;
    });
  }

  public function route(): Page {
    $reqRepo = $_GET['repo'] ?? '';
    $action = $_GET['action'] ?? 'home';
    $hash = $this->sanitizePath($_GET['hash'] ?? '');

    $currentRepo = null;
    $decoded = urldecode($reqRepo);

    foreach ($this->repositories as $repo) {
      if ($repo['safe_name'] === $reqRepo || $repo['name'] === $decoded) {
        $currentRepo = $repo;
        break;
      }
    }

    if (!$currentRepo) {
      return new HomePage($this->repositories, $this->git);
    }

    $this->git->setRepository($currentRepo['path']);

    if ($action === 'raw') {
      return new RawPage($this->git, $hash);
    }

    if ($action === 'commit') {
      return new DiffPage($this->repositories, $currentRepo, $this->git, $hash);
    }

    if ($action === 'commits') {
      return new CommitsPage($this->repositories, $currentRepo, $this->git, $hash);
    }

    return new FilePage($this->repositories, $currentRepo, $this->git, $hash);
  }

  private function sanitizePath($path) {
    $path = str_replace(['..', '\\', "\0"], ['', '/', ''], $path);
    return preg_replace('/[^a-zA-Z0-9_\-\.\/]/', '', $path);
  }
}