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<?php

declare(strict_types=1);

namespace Drupal\Tests\system\Functional\Module;

use Drupal\Core\Cache\Cache;
use Drupal\Core\Entity\EntityMalformedException;
use Drupal\node\Entity\Node;
use Drupal\node\Entity\NodeType;
use Drupal\Tests\BrowserTestBase;
use Drupal\user\Entity\Role;
use Drupal\user\RoleInterface;

/**
 * Tests the uninstallation of modules.
 *
 * @group Module
 */
class UninstallTest extends BrowserTestBase {

  /**
   * {@inheritdoc}
   */
  protected static $modules = ['module_test', 'user', 'views', 'node'];

  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';

  /**
   * Tests the hook_modules_uninstalled() of the user module.
   */
  public function testUserPermsUninstalled(): void {
    // Uninstalls the module_test module, so hook_modules_uninstalled()
    // is executed.
    $this->container->get('module_installer')->uninstall(['module_test']);

    // Are the perms defined by module_test removed?
    $roles = array_filter(Role::loadMultiple(), fn(RoleInterface $role) => $role->hasPermission('module_test perm'));
    $this->assertEmpty($roles, 'Permissions were all removed.');
  }

  /**
   * Tests the Uninstall page and Uninstall confirmation page.
   */
  public function testUninstallPage(): void {
    $account = $this->drupalCreateUser(['administer modules']);
    $this->drupalLogin($account);

    // Create a node type.
    $node_type = NodeType::create(['type' => 'uninstall_blocker', 'name' => 'Uninstall blocker']);
    // Create a dependency that can be fixed.
    $node_type->setThirdPartySetting('module_test', 'key', 'value');
    $node_type->save();
    // Add a node to prevent node from being uninstalled.
    $node = Node::create([
      'type' => 'uninstall_blocker',
      'title' => $this->randomString(),
    ]);
    $node->save();

    // Change the config directly to "install" non-stable modules.
    $this->config('core.extension')
      ->set('module.system_status_obsolete_test', 0)
      ->set('module.deprecated_module', 0)
      ->set('module.experimental_module_test', 0)
      ->save();
    $this->rebuildAll();

    $this->drupalGet('admin/modules/uninstall');
    $this->assertSession()->titleEquals('Uninstall | Drupal');

    // Check that the experimental module link was rendered correctly.
    $this->assertSession()->elementExists('xpath', "//a[contains(@aria-label, 'View information on the Experimental status of the module Experimental Test')]");
    $this->assertSession()->elementExists('xpath', "//a[contains(@href, 'https://example.com/experimental')]");

    // Check that the deprecated module link was rendered correctly.
    $this->assertSession()->elementExists('xpath', "//a[contains(@aria-label, 'View information on the Deprecated status of the module Deprecated module')]");
    $this->assertSession()->elementExists('xpath', "//a[contains(@href, 'http://example.com/deprecated')]");

    // Check that the obsolete module link was rendered correctly.
    $this->assertSession()->elementExists('xpath', "//a[contains(@aria-label, 'View information on the Obsolete status of the module System obsolete status test')]");
    $this->assertSession()->elementExists('xpath', "//a[contains(@href, 'https://example.com/obsolete')]");

    $form = $this->assertSession()->elementExists('xpath', "//form[@id='system-modules-uninstall']");
    $form_html = $form->getOuterHtml();

    // Select the first stable module on the uninstall list.
    $module_stable = $this->assertSession()->elementExists('xpath', "//label[contains(@class, 'module-name') and not(./a[contains(@class, 'module-link--non-stable')])]")->getOuterHtml();

    // Select the unstable modules (deprecated, and obsolete).
    $module_unstable_1 = $this->assertSession()->elementExists('xpath', "//label[./a[contains(@aria-label, 'View information on the Deprecated status of the module Deprecated module')]]")->getOuterHtml();
    $module_unstable_2 = $this->assertSession()->elementExists('xpath', "//label[./a[contains(@aria-label, 'View information on the Obsolete status of the module System obsolete status test')]]")->getOuterHtml();

    // Check that all unstable modules appear before the first stable module.
    $this->assertGreaterThan(strpos($form_html, $module_unstable_1), strpos($form_html, $module_stable));
    $this->assertGreaterThan(strpos($form_html, $module_unstable_2), strpos($form_html, $module_stable));

    foreach (\Drupal::service('extension.list.module')->getAllInstalledInfo() as $module => $info) {
      $field_name = "uninstall[$module]";
      if (!empty($info['required'])) {
        // A required module should not be listed on the uninstall page.
        $this->assertSession()->fieldNotExists($field_name);
      }
      else {
        $this->assertSession()->fieldExists($field_name);
      }
    }

    // Be sure labels are rendered properly.
    // @see regression https://www.drupal.org/node/2512106
    $this->assertSession()->responseContains('<label for="edit-uninstall-node" class="module-name table-filter-text-source">Node</label>');

    $this->assertSession()->pageTextContains('The following reason prevents Node from being uninstalled:');
    $this->assertSession()->pageTextContains('There is content for the entity type: Content');
    // Delete the node to allow node to be uninstalled.
    $node->delete();

    // Uninstall module_test.
    $edit = [];
    $edit['uninstall[module_test]'] = TRUE;
    $this->drupalGet('admin/modules/uninstall');
    $this->submitForm($edit, 'Uninstall');
    $this->assertSession()->pageTextNotContains('Configuration deletions');
    $this->assertSession()->pageTextContains('Configuration updates');
    $this->assertSession()->pageTextContains($node_type->label());
    $this->submitForm([], 'Uninstall');
    $this->assertSession()->pageTextContains('The selected modules have been uninstalled.');

    // Uninstall node testing that the configuration that will be deleted is
    // listed.
    $node_dependencies = \Drupal::service('config.manager')->findConfigEntityDependenciesAsEntities('module', ['node']);
    $edit = [];
    $edit['uninstall[node]'] = TRUE;
    $this->drupalGet('admin/modules/uninstall');
    $this->submitForm($edit, 'Uninstall');
    $this->assertSession()->pageTextContains('Configuration deletions');
    $this->assertSession()->pageTextNotContains('Configuration updates');

    $entity_types = [];
    foreach ($node_dependencies as $entity) {
      $label = $entity->label() ?: $entity->id();
      $this->assertSession()->pageTextContains($label);
      $entity_types[] = $entity->getEntityTypeId();
    }
    $entity_types = array_unique($entity_types);
    foreach ($entity_types as $entity_type_id) {
      $entity_type = \Drupal::entityTypeManager()->getDefinition($entity_type_id);
      // Add h3's since the entity type label is often repeated in the entity
      // labels.
      $this->assertSession()->responseContains('<h3>' . $entity_type->getLabel() . '</h3>');
    }

    // Set a unique cache entry to be able to test whether all caches are
    // cleared during the uninstall.
    \Drupal::cache()->set('uninstall_test', 'test_uninstall_page', Cache::PERMANENT);
    $cached = \Drupal::cache()->get('uninstall_test');
    $this->assertEquals('test_uninstall_page', $cached->data, "Cache entry found: $cached->data");

    $this->submitForm([], 'Uninstall');
    $this->assertSession()->pageTextContains('The selected modules have been uninstalled.');
    // Check that the page does not have double escaped HTML tags.
    $this->assertSession()->responseNotContains('&lt;label');

    // Make sure our unique cache entry is gone.
    $cached = \Drupal::cache()->get('uninstall_test');
    $this->assertFalse($cached, 'Cache entry not found');
    // Make sure we get an error message when we try to confirm uninstallation
    // of an empty list of modules.
    $this->drupalGet('admin/modules/uninstall/confirm');
    $this->assertSession()->pageTextContains('The selected modules could not be uninstalled, either due to a website problem or due to the uninstall confirmation form timing out.');

    // Make sure confirmation page is accessible only during uninstall process.
    $this->drupalGet('admin/modules/uninstall/confirm');
    $this->assertSession()->addressEquals('admin/modules/uninstall');
    $this->assertSession()->titleEquals('Uninstall | Drupal');

    // Make sure the correct error is shown when no modules are selected.
    $edit = [];
    $this->drupalGet('admin/modules/uninstall');
    $this->submitForm($edit, 'Uninstall');
    $this->assertSession()->pageTextContains('No modules selected.');
  }

  /**
   * Tests that a module which fails to install can still be uninstalled.
   */
  public function testFailedInstallStatus(): void {
    $account = $this->drupalCreateUser(['administer modules']);
    $this->drupalLogin($account);

    $message = 'Exception thrown when installing module_installer_config_test with an invalid configuration file.';
    try {
      $this->container->get('module_installer')->install(['module_installer_config_test']);
      $this->fail($message);
    }
    catch (EntityMalformedException $e) {
      // Expected exception; just continue testing.
    }

    // Even though the module failed to install properly, its configuration
    // status is "enabled" and should still be available to uninstall.
    $this->drupalGet('admin/modules/uninstall');
    $this->assertSession()->pageTextContains('Module installer config test');
    $edit['uninstall[module_installer_config_test]'] = TRUE;
    $this->drupalGet('admin/modules/uninstall');
    $this->submitForm($edit, 'Uninstall');
    $this->submitForm([], 'Uninstall');
    $this->assertSession()->pageTextContains('The selected modules have been uninstalled.');
    $this->assertSession()->pageTextNotContains('Module installer config test');
  }

}