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<?php

namespace Drupal\Tests\system\Functional\Update;

use Drupal\Core\Url;
use Drupal\language\Entity\ConfigurableLanguage;
use Drupal\Tests\BrowserTestBase;
use Drupal\Tests\RequirementsPageTrait;

/**
 * Tests the update script access and functionality.
 *
 * @group Update
 */
class UpdateScriptTest extends BrowserTestBase {

  use RequirementsPageTrait;

  /**
   * Modules to enable.
   *
   * @var array
   */
  public static $modules = ['update_script_test', 'dblog', 'language'];

  /**
   * {@inheritdoc}
   */
  protected $dumpHeaders = TRUE;

  /**
   * URL to the update.php script.
   *
   * @var string
   */
  private $updateUrl;

  /**
   * A user with the necessary permissions to administer software updates.
   *
   * @var \Drupal\user\UserInterface
   */
  private $updateUser;

  protected function setUp() {
    parent::setUp();
    $this->updateUrl = Url::fromRoute('system.db_update');
    $this->updateUser = $this->drupalCreateUser(['administer software updates', 'access site in maintenance mode']);
  }

  /**
   * Tests access to the update script.
   */
  public function testUpdateAccess() {
    // Try accessing update.php without the proper permission.
    $regular_user = $this->drupalCreateUser();
    $this->drupalLogin($regular_user);
    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
    $this->assertResponse(403);

    // Check that a link to the update page is not accessible to regular users.
    $this->drupalGet('/update-script-test/database-updates-menu-item');
    $this->assertNoLink('Run database updates');

    // Try accessing update.php as an anonymous user.
    $this->drupalLogout();
    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
    $this->assertResponse(403);

    // Check that a link to the update page is not accessible to anonymous
    // users.
    $this->drupalGet('/update-script-test/database-updates-menu-item');
    $this->assertNoLink('Run database updates');

    // Access the update page with the proper permission.
    $this->drupalLogin($this->updateUser);
    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
    $this->assertResponse(200);

    // Check that a link to the update page is accessible to users with proper
    // permissions.
    $this->drupalGet('/update-script-test/database-updates-menu-item');
    $this->assertLink('Run database updates');

    // Access the update page as user 1.
    $this->drupalLogin($this->rootUser);
    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
    $this->assertResponse(200);

    // Check that a link to the update page is accessible to user 1.
    $this->drupalGet('/update-script-test/database-updates-menu-item');
    $this->assertLink('Run database updates');
  }

  /**
   * Tests that requirements warnings and errors are correctly displayed.
   */
  public function testRequirements() {
    $update_script_test_config = $this->config('update_script_test.settings');
    $this->drupalLogin($this->updateUser);

    // If there are no requirements warnings or errors, we expect to be able to
    // go through the update process uninterrupted.
    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
    $this->updateRequirementsProblem();
    $this->clickLink(t('Continue'));
    $this->assertText(t('No pending updates.'), 'End of update process was reached.');
    // Confirm that all caches were cleared.
    $this->assertText(t('hook_cache_flush() invoked for update_script_test.module.'), 'Caches were cleared when there were no requirements warnings or errors.');

    // If there is a requirements warning, we expect it to be initially
    // displayed, but clicking the link to proceed should allow us to go
    // through the rest of the update process uninterrupted.

    // First, run this test with pending updates to make sure they can be run
    // successfully.
    $this->drupalLogin($this->updateUser);
    $update_script_test_config->set('requirement_type', REQUIREMENT_WARNING)->save();
    drupal_set_installed_schema_version('update_script_test', drupal_get_installed_schema_version('update_script_test') - 1);
    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
    $this->assertText('This is a requirements warning provided by the update_script_test module.');
    $this->clickLink('try again');
    $this->assertNoText('This is a requirements warning provided by the update_script_test module.');
    $this->clickLink(t('Continue'));
    $this->clickLink(t('Apply pending updates'));
    $this->checkForMetaRefresh();
    $this->assertText(t('The update_script_test_update_8001() update was executed successfully.'), 'End of update process was reached.');
    // Confirm that all caches were cleared.
    $this->assertText(t('hook_cache_flush() invoked for update_script_test.module.'), 'Caches were cleared after resolving a requirements warning and applying updates.');

    // Now try again without pending updates to make sure that works too.
    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
    $this->assertText('This is a requirements warning provided by the update_script_test module.');
    $this->clickLink('try again');
    $this->assertNoText('This is a requirements warning provided by the update_script_test module.');
    $this->clickLink(t('Continue'));
    $this->assertText(t('No pending updates.'), 'End of update process was reached.');
    // Confirm that all caches were cleared.
    $this->assertText(t('hook_cache_flush() invoked for update_script_test.module.'), 'Caches were cleared after applying updates and re-running the script.');

    // If there is a requirements error, it should be displayed even after
    // clicking the link to proceed (since the problem that triggered the error
    // has not been fixed).
    $update_script_test_config->set('requirement_type', REQUIREMENT_ERROR)->save();
    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
    $this->assertText('This is a requirements error provided by the update_script_test module.');
    $this->clickLink('try again');
    $this->assertText('This is a requirements error provided by the update_script_test module.');

    // Ensure that changes to a module's requirements that would cause errors
    // are displayed correctly.
    $update_script_test_config->set('requirement_type', REQUIREMENT_OK)->save();
    \Drupal::state()->set('update_script_test.system_info_alter', ['dependencies' => ['a_module_that_does_not_exist']]);
    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
    $this->assertSession()->responseContains('a_module_that_does_not_exist (Missing)');
    $this->assertSession()->responseContains('Update script test requires this module.');

    \Drupal::state()->set('update_script_test.system_info_alter', ['dependencies' => ['node (<7.x-0.0-dev)']]);
    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
    $this->assertSession()->assertEscaped('Node (Version <7.x-0.0-dev required)');
    $this->assertSession()->responseContains('Update script test requires this module and version. Currently using Node version ' . \Drupal::VERSION);
  }

  /**
   * Tests the effect of using the update script on the theme system.
   */
  public function testThemeSystem() {
    // Since visiting update.php triggers a rebuild of the theme system from an
    // unusual maintenance mode environment, we check that this rebuild did not
    // put any incorrect information about the themes into the database.
    $original_theme_data = $this->config('core.extension')->get('theme');
    $this->drupalLogin($this->updateUser);
    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
    $final_theme_data = $this->config('core.extension')->get('theme');
    $this->assertEqual($original_theme_data, $final_theme_data, 'Visiting update.php does not alter the information about themes stored in the database.');
  }

  /**
   * Tests update.php when there are no updates to apply.
   */
  public function testNoUpdateFunctionality() {
    // Click through update.php with 'administer software updates' permission.
    $this->drupalLogin($this->updateUser);
    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
    $this->updateRequirementsProblem();
    $this->clickLink(t('Continue'));
    $this->assertText(t('No pending updates.'));
    $this->assertNoLink('Administration pages');
    $this->assertEmpty($this->xpath('//main//a[contains(@href, :href)]', [':href' => 'update.php']));
    $this->clickLink('Front page');
    $this->assertResponse(200);

    // Click through update.php with 'access administration pages' permission.
    $admin_user = $this->drupalCreateUser(['administer software updates', 'access administration pages']);
    $this->drupalLogin($admin_user);
    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
    $this->updateRequirementsProblem();
    $this->clickLink(t('Continue'));
    $this->assertText(t('No pending updates.'));
    $this->assertLink('Administration pages');
    $this->assertEmpty($this->xpath('//main//a[contains(@href, :href)]', [':href' => 'update.php']));
    $this->clickLink('Administration pages');
    $this->assertResponse(200);
  }

  /**
   * Tests update.php after performing a successful update.
   */
  public function testSuccessfulUpdateFunctionality() {
    $initial_maintenance_mode = $this->container->get('state')->get('system.maintenance_mode');
    $this->assertFalse($initial_maintenance_mode, 'Site is not in maintenance mode.');
    $this->runUpdates($initial_maintenance_mode);
    $final_maintenance_mode = $this->container->get('state')->get('system.maintenance_mode');
    $this->assertEqual($final_maintenance_mode, $initial_maintenance_mode, 'Maintenance mode should not have changed after database updates.');

    // Reset the static cache to ensure we have the most current setting.
    $schema_version = drupal_get_installed_schema_version('update_script_test', TRUE);
    $this->assertEqual($schema_version, 8001, 'update_script_test schema version is 8001 after updating.');

    // Set the installed schema version to one less than the current update.
    drupal_set_installed_schema_version('update_script_test', $schema_version - 1);
    $schema_version = drupal_get_installed_schema_version('update_script_test', TRUE);
    $this->assertEqual($schema_version, 8000, 'update_script_test schema version overridden to 8000.');

    // Click through update.php with 'access administration pages' and
    // 'access site reports' permissions.
    $admin_user = $this->drupalCreateUser(['administer software updates', 'access administration pages', 'access site reports', 'access site in maintenance mode']);
    $this->drupalLogin($admin_user);
    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
    $this->updateRequirementsProblem();
    $this->clickLink(t('Continue'));
    $this->clickLink(t('Apply pending updates'));
    $this->checkForMetaRefresh();
    $this->assertText('Updates were attempted.');
    $this->assertLink('logged');
    $this->assertLink('Administration pages');
    $this->assertEmpty($this->xpath('//main//a[contains(@href, :href)]', [':href' => 'update.php']));
    $this->clickLink('Administration pages');
    $this->assertResponse(200);
  }

  /**
   * Tests update.php while in maintenance mode.
   */
  public function testMaintenanceModeUpdateFunctionality() {
    $this->container->get('state')
      ->set('system.maintenance_mode', TRUE);
    $initial_maintenance_mode = $this->container->get('state')
      ->get('system.maintenance_mode');
    $this->assertTrue($initial_maintenance_mode, 'Site is in maintenance mode.');
    $this->runUpdates($initial_maintenance_mode);
    $final_maintenance_mode = $this->container->get('state')
      ->get('system.maintenance_mode');
    $this->assertEqual($final_maintenance_mode, $initial_maintenance_mode, 'Maintenance mode should not have changed after database updates.');
  }

  /**
   * Tests perfoming updates with update.php in a multilingual environment.
   */
  public function testSuccessfulMultilingualUpdateFunctionality() {
    // Add some custom languages.
    foreach (['aa', 'bb'] as $language_code) {
      ConfigurableLanguage::create([
          'id' => $language_code,
          'label' => $this->randomMachineName(),
        ])->save();
    }

    $config = \Drupal::service('config.factory')->getEditable('language.negotiation');
    // Ensure path prefix is used to determine the language.
    $config->set('url.source', 'path_prefix');
    // Ensure that there's a path prefix set for english as well.
    $config->set('url.prefixes.en', 'en');
    $config->save();

    // Reset the static cache to ensure we have the most current setting.
    $schema_version = drupal_get_installed_schema_version('update_script_test', TRUE);
    $this->assertEqual($schema_version, 8001, 'update_script_test schema version is 8001 after updating.');

    // Set the installed schema version to one less than the current update.
    drupal_set_installed_schema_version('update_script_test', $schema_version - 1);
    $schema_version = drupal_get_installed_schema_version('update_script_test', TRUE);
    $this->assertEqual($schema_version, 8000, 'update_script_test schema version overridden to 8000.');

    // Create admin user.
    $admin_user = $this->drupalCreateUser(['administer software updates', 'access administration pages', 'access site reports', 'access site in maintenance mode', 'administer site configuration']);
    $this->drupalLogin($admin_user);

    // Visit status report page and ensure, that link to update.php has no path prefix set.
    $this->drupalGet('en/admin/reports/status', ['external' => TRUE]);
    $this->assertResponse(200);
    $this->assertLinkByHref('/update.php');
    $this->assertNoLinkByHref('en/update.php');

    // Click through update.php with 'access administration pages' and
    // 'access site reports' permissions.
    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
    $this->updateRequirementsProblem();
    $this->clickLink(t('Continue'));
    $this->clickLink(t('Apply pending updates'));
    $this->checkForMetaRefresh();
    $this->assertText('Updates were attempted.');
    $this->assertLink('logged');
    $this->assertLink('Administration pages');
    $this->assertEmpty($this->xpath('//main//a[contains(@href, :href)]', [':href' => 'update.php']));
    $this->clickLink('Administration pages');
    $this->assertResponse(200);
  }

  /**
   * Helper function to run updates via the browser.
   */
  protected function runUpdates($maintenance_mode) {
    $schema_version = drupal_get_installed_schema_version('update_script_test');
    $this->assertEqual($schema_version, 8001, 'update_script_test is initially installed with schema version 8001.');

    // Set the installed schema version to one less than the current update.
    drupal_set_installed_schema_version('update_script_test', $schema_version - 1);
    $schema_version = drupal_get_installed_schema_version('update_script_test', TRUE);
    $this->assertEqual($schema_version, 8000, 'update_script_test schema version overridden to 8000.');

    // Click through update.php with 'administer software updates' permission.
    $this->drupalLogin($this->updateUser);
    if ($maintenance_mode) {
      $this->assertText('Operating in maintenance mode.');
    }
    else {
      $this->assertNoText('Operating in maintenance mode.');
    }
    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
    $this->updateRequirementsProblem();
    $this->clickLink(t('Continue'));
    $this->clickLink(t('Apply pending updates'));
    $this->checkForMetaRefresh();

    // Verify that updates were completed successfully.
    $this->assertText('Updates were attempted.');
    $this->assertLink('site');
    $this->assertText('The update_script_test_update_8001() update was executed successfully.');

    // Verify that no 7.x updates were run.
    $this->assertNoText('The update_script_test_update_7200() update was executed successfully.');
    $this->assertNoText('The update_script_test_update_7201() update was executed successfully.');

    // Verify that there are no links to different parts of the workflow.
    $this->assertNoLink('Administration pages');
    $this->assertEmpty($this->xpath('//main//a[contains(@href, :href)]', [':href' => 'update.php']));
    $this->assertNoLink('logged');

    // Verify the front page can be visited following the upgrade.
    $this->clickLink('Front page');
    $this->assertResponse(200);
  }

  /**
   * Returns the Drupal 7 system table schema.
   */
  public function getSystemSchema() {
    return [
      'description' => "A list of all modules, themes, and theme engines that are or have been installed in Drupal's file system.",
      'fields' => [
        'filename' => [
          'description' => 'The path of the primary file for this item, relative to the Drupal root; e.g. modules/node/node.module.',
          'type' => 'varchar',
          'length' => 255,
          'not null' => TRUE,
          'default' => '',
        ],
        'name' => [
          'description' => 'The name of the item; e.g. node.',
          'type' => 'varchar',
          'length' => 255,
          'not null' => TRUE,
          'default' => '',
        ],
        'type' => [
          'description' => 'The type of the item, either module, theme, or theme_engine.',
          'type' => 'varchar',
          'length' => 12,
          'not null' => TRUE,
          'default' => '',
        ],
        'owner' => [
          'description' => "A theme's 'parent' . Can be either a theme or an engine.",
          'type' => 'varchar',
          'length' => 255,
          'not null' => TRUE,
          'default' => '',
        ],
        'status' => [
          'description' => 'Boolean indicating whether or not this item is enabled.',
          'type' => 'int',
          'not null' => TRUE,
          'default' => 0,
        ],
        'bootstrap' => [
          'description' => "Boolean indicating whether this module is loaded during Drupal's early bootstrapping phase (e.g. even before the page cache is consulted).",
          'type' => 'int',
          'not null' => TRUE,
          'default' => 0,
        ],
        'schema_version' => [
          'description' => "The module's database schema version number. -1 if the module is not installed (its tables do not exist); \Drupal::CORE_MINIMUM_SCHEMA_VERSION or the largest N of the module's hook_update_N() function that has either been run or existed when the module was first installed.",
          'type' => 'int',
          'not null' => TRUE,
          'default' => -1,
          'size' => 'small',
        ],
        'weight' => [
          'description' => "The order in which this module's hooks should be invoked relative to other modules. Equal-weighted modules are ordered by name.",
          'type' => 'int',
          'not null' => TRUE,
          'default' => 0,
        ],
        'info' => [
          'description' => "A serialized array containing information from the module's .info file; keys can include name, description, package, version, core, dependencies, and php.",
          'type' => 'blob',
          'not null' => FALSE,
        ],
      ],
      'primary key' => ['filename'],
      'indexes' => [
        'system_list' => ['status', 'bootstrap', 'type', 'weight', 'name'],
        'type_name' => ['type', 'name'],
      ],
    ];
  }

}