RouteProvider.php

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<?php
 
namespace Drupal\dkan_frontend\Routing;
 
use Drupal\Core\Entity\Query\QueryFactory;
use Symfony\Component\Routing\Route;
use Symfony\Component\Routing\RouteCollection;
 
class RouteProvider {
 
  private $appRoot;
  private $entityQuery;
 
  public function __construct(string $appRoot, QueryFactory $entityQuery) {
    $this->appRoot = $appRoot;
    $this->entityQuery = $entityQuery;
  }
 
  public function routes() {
    $routes = new RouteCollection();
 
    $this->addStaticPages($routes);
 
    $routes->addRequirements(['_access' => 'TRUE']);
 
    return $routes;
  }
 
  public  function getNameFromPath($path) {
    $base = $this->appRoot . "/data-catalog-frontend/public/";
    $sub = str_replace($base, "", $path);
    return str_replace("/", "__", $sub);
  }
 
  private function expandDirectories($base_dir) {
    $directories = [];
 
    if (!file_exists($base_dir)) {
      return $directories;
    }
 
    foreach (scandir($base_dir) as $file) {
      if ($file == '.' || $file == '..') {
        continue;
      }
      $dir = $base_dir . DIRECTORY_SEPARATOR . $file;
      if (is_dir($dir)) {
        $directories[] = $dir;
        $directories = array_merge($directories, $this->expandDirectories($dir));
      }
    }
    return $directories;
  }
 
  private function routeHelper(string $path, string $name) : Route {
    $route = new Route(
          "/$path",
          [
            '_controller' => '\Drupal\dkan_frontend\Controller\Page::page',
            'name' => $name,
          ]
      );
    $route->setMethods(['GET']);
    return $route;
  }
 
  private function addStaticPages(RouteCollection $routes) {
    $base = $this->appRoot . "/data-catalog-frontend/public";
    $possible_pages = $this->expandDirectories($base);
 
    foreach ($possible_pages as $possible_page) {
      if (file_exists($possible_page . "/index.html")) {
        $name = self::getNameFromPath($possible_page);
        $path = str_replace($base, "", $possible_page);
        $routes->add($name, $this->routeHelper($path, $name));
      }
    }
 
    $route = new Route(
      "/home",
      [
        '_controller' => '\Drupal\dkan_frontend\Controller\Page::page',
        'name' => 'home',
      ]
    );
    $route->setMethods(['GET']);
    $routes->add('home', $route);
  }
 
}