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<?php

namespace Drupal\KernelTests\Core\Routing;

use Drupal\Component\Utility\Html;
use Drupal\Core\Cache\CacheableJsonResponse;
use Drupal\KernelTests\KernelTestBase;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

/**
 * Tests the exception handling for various cases.
 *
 * @group Routing
 */
class ExceptionHandlingTest extends KernelTestBase {

  /**
   * {@inheritdoc}
   */
  public static $modules = ['system', 'router_test'];

  /**
   * {@inheritdoc}
   */
  protected function setUp() {
    parent::setUp();

    $this->installEntitySchema('date_format');
  }

  /**
   * Tests on a route with a non-supported HTTP method.
   */
  public function test405() {
    $request = Request::create('/router_test/test15', 'PATCH');

    /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
    $kernel = \Drupal::getContainer()->get('http_kernel');
    $response = $kernel->handle($request);

    $this->assertEqual(Response::HTTP_METHOD_NOT_ALLOWED, $response->getStatusCode());
  }

  /**
   * Tests the exception handling for json and 403 status code.
   */
  public function testJson403() {
    $request = Request::create('/router_test/test15');
    $request->query->set('_format', 'json');
    $request->setRequestFormat('json');

    /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
    $kernel = \Drupal::getContainer()->get('http_kernel');
    $response = $kernel->handle($request);

    $this->assertEqual($response->getStatusCode(), Response::HTTP_FORBIDDEN);
    $this->assertEqual($response->headers->get('Content-type'), 'application/json');
    $this->assertEqual('{"message":""}', $response->getContent());
    $this->assertInstanceOf(CacheableJsonResponse::class, $response);
  }

  /**
   * Tests the exception handling for json and 404 status code.
   */
  public function testJson404() {
    $request = Request::create('/not-found');
    $request->query->set('_format', 'json');
    $request->setRequestFormat('json');

    /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
    $kernel = \Drupal::getContainer()->get('http_kernel');
    $response = $kernel->handle($request);

    $this->assertEqual($response->getStatusCode(), Response::HTTP_NOT_FOUND);
    $this->assertEqual($response->headers->get('Content-type'), 'application/json');
    $this->assertEqual('{"message":"No route found for \\u0022GET \\/not-found\\u0022"}', $response->getContent());
  }

  /**
   * Tests the exception handling for HTML and 403 status code.
   */
  public function testHtml403() {
    $request = Request::create('/router_test/test15');
    $request->setFormat('html', ['text/html']);

    /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
    $kernel = \Drupal::getContainer()->get('http_kernel');
    $response = $kernel->handle($request)->prepare($request);

    $this->assertEqual($response->getStatusCode(), Response::HTTP_FORBIDDEN);
    $this->assertEqual($response->headers->get('Content-type'), 'text/html; charset=UTF-8');
  }

  /**
   * Tests the exception handling for HTML and 404 status code.
   */
  public function testHtml404() {
    $request = Request::create('/not-found');
    $request->setFormat('html', ['text/html']);

    /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
    $kernel = \Drupal::getContainer()->get('http_kernel');
    $response = $kernel->handle($request)->prepare($request);

    $this->assertEqual($response->getStatusCode(), Response::HTTP_NOT_FOUND);
    $this->assertEqual($response->headers->get('Content-type'), 'text/html; charset=UTF-8');
  }

  /**
   * Tests that the exception response is executed in the original context.
   */
  public function testExceptionResponseGeneratedForOriginalRequest() {
    // Test with 404 path pointing to a route that uses '_controller'.
    $response = $this->doTest404Route('/router_test/test25');
    $this->assertTrue(strpos($response->getContent(), '/not-found') !== FALSE);

    // Test with 404 path pointing to a route that uses '_form'.
    $response = $this->doTest404Route('/router_test/test26');
    $this->assertTrue(strpos($response->getContent(), '<form class="system-logging-settings"') !== FALSE);

    // Test with 404 path pointing to a route that uses '_entity_form'.
    $response = $this->doTest404Route('/router_test/test27');
    $this->assertTrue(strpos($response->getContent(), '<form class="date-format-add-form date-format-form"') !== FALSE);
  }

  /**
   * Sets the given path to use as the 404 page and triggers a 404.
   *
   * @param string $path
   * @return \Drupal\Core\Render\HtmlResponse
   *
   * @see \Drupal\system\Tests\Routing\ExceptionHandlingTest::testExceptionResponseGeneratedForOriginalRequest()
   */
  protected function doTest404Route($path) {
    $this->config('system.site')->set('page.404', $path)->save();

    $request = Request::create('/not-found');
    $request->setFormat('html', ['text/html']);

    /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
    $kernel = \Drupal::getContainer()->get('http_kernel');
    return $kernel->handle($request)->prepare($request);
  }

  /**
   * Tests if exception backtraces are properly escaped when output to HTML.
   */
  public function testBacktraceEscaping() {
    // Enable verbose error logging.
    $this->config('system.logging')->set('error_level', ERROR_REPORTING_DISPLAY_VERBOSE)->save();

    $request = Request::create('/router_test/test17');
    $request->setFormat('html', ['text/html']);

    /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
    $kernel = \Drupal::getContainer()->get('http_kernel');
    $response = $kernel->handle($request)->prepare($request);
    $this->assertEqual($response->getStatusCode(), Response::HTTP_INTERNAL_SERVER_ERROR);
    $this->assertEqual($response->headers->get('Content-type'), 'text/plain; charset=UTF-8');

    // Test both that the backtrace is properly escaped, and that the unescaped
    // string is not output at all.
    $this->assertTrue(strpos($response->getContent(), Html::escape('<script>alert(\'xss\')</script>')) !== FALSE);
    $this->assertTrue(strpos($response->getContent(), '<script>alert(\'xss\')</script>') === FALSE);
  }

  /**
   * Tests exception message escaping.
   */
  public function testExceptionEscaping() {
    // Enable verbose error logging.
    $this->config('system.logging')->set('error_level', ERROR_REPORTING_DISPLAY_VERBOSE)->save();

    // Using \Drupal\Component\Render\FormattableMarkup.
    $request = Request::create('/router_test/test24');
    $request->setFormat('html', ['text/html']);

    /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
    $kernel = \Drupal::getContainer()->get('http_kernel');
    $response = $kernel->handle($request)->prepare($request);
    $this->assertEqual($response->getStatusCode(), Response::HTTP_INTERNAL_SERVER_ERROR);
    $this->assertEqual($response->headers->get('Content-type'), 'text/plain; charset=UTF-8');

    // Test message is properly escaped, and that the unescaped string is not
    // output at all.
    $this->setRawContent($response->getContent());
    $this->assertRaw(Html::escape('Escaped content: <p> <br> <h3>'));
    $this->assertNoRaw('<p> <br> <h3>');

    $string = '<script>alert(123);</script>';
    $request = Request::create('/router_test/test2?_format=json' . urlencode($string), 'GET');

    $kernel = \Drupal::getContainer()->get('http_kernel');
    $response = $kernel->handle($request)->prepare($request);
    // As the Content-type is text/plain the fact that the raw string is
    // contained in the output would not matter, but because it is output by the
    // final exception subscriber, it is printed as partial HTML, and hence
    // escaped.
    $this->assertEqual($response->headers->get('Content-type'), 'text/plain; charset=UTF-8');
    $this->assertStringStartsWith('The website encountered an unexpected error. Please try again later.</br></br><em class="placeholder">Symfony\Component\HttpKernel\Exception\NotAcceptableHttpException</em>: Not acceptable format: json&lt;script&gt;alert(123);&lt;/script&gt; in <em class="placeholder">', $response->getContent());
  }

}