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<?php

namespace Drupal\Tests\field_ui\FunctionalJavascript;

use Drupal\Core\Entity\Entity\EntityFormDisplay;
use Drupal\FunctionalJavascriptTests\WebDriverTestBase;

/**
 * Tests the Field UI "Manage display" and "Manage form display" screens.
 *
 * @group field_ui
 */
class ManageDisplayTest extends WebDriverTestBase {

  /**
   * {@inheritdoc}
   */
  public static $modules = [
    'node',
    'field_ui',
    'field_test',
    'field_third_party_test',
    'block',
  ];

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

  /**
   * @var string
   */
  protected $type;

  /**
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
   */
  protected $entity_type_manager;

  /**
   * @var \Drupal\Core\Entity\EntityStorageInterface
   */
  protected $display_storage;

  /**
   * {@inheritdoc}
   */
  protected function setUp() {
    parent::setUp();
    $this->drupalPlaceBlock('system_breadcrumb_block');

    // Create a test user.
    $admin_user = $this->drupalCreateUser([
      'access content',
      'administer content types',
      'administer node fields',
      'administer node form display',
      'administer node display',
      'administer users',
      'administer account settings',
      'administer user display',
      'bypass node access',
    ]);
    $this->drupalLogin($admin_user);

    // Create content type, with underscores.
    $type_name = strtolower($this->randomMachineName(8)) . '_test';
    $type = $this->drupalCreateContentType(['name' => $type_name, 'type' => $type_name]);
    $this->type = $type->id();

    $this->entity_type_manager = $this->container->get('entity_type.manager');
  }

  /**
   * Tests formatter settings.
   */
  public function testFormatterUI() {
    $manage_fields = 'admin/structure/types/manage/' . $this->type;
    $manage_display = $manage_fields . '/display';

    // Create a field, and a node with some data for the field.
    $this->fieldUIAddNewField($manage_fields, 'test', 'Test field');

    $display_id = 'node.' . $this->type . '.default';
    $display_storage = $this->entity_type_manager->getStorage('entity_view_display');

    // Get the display options (formatter and settings) that were automatically
    // assigned for the 'default' display.
    /** @var \Drupal\Core\Entity\Display\EntityViewDisplayInterface $display */
    $display = $display_storage->loadUnchanged($display_id);
    $display_options = $display->getComponent('field_test');
    $format = $display_options['type'];
    $default_settings = \Drupal::service('plugin.manager.field.formatter')->getDefaultSettings($format);
    $setting_name = key($default_settings);
    $setting_value = $display_options['settings'][$setting_name];

    // Display the "Manage display" screen and check that the expected formatter
    // is selected.
    $this->drupalGet($manage_display);

    $session = $this->getSession();
    $assert_session = $this->assertSession();
    $page = $session->getPage();

    // Find commonly used elements in this test.
    $button_save = $page->findButton('Save');
    $field_test_format_type = $page->findField('fields[field_test][type]');
    $field_test_drag_handle = $page->find('css', '#field-test .tabledrag-handle');
    $field_test_settings = $page->find('css', 'input[name="field_test_settings_edit"]');
    $weight_toggle = $page->find('css', '.tabledrag-toggle-weight');

    // Assert the format typr field is visible and contains the expected
    // formatter.
    $this->assertTrue($field_test_format_type->isVisible());
    $this->assertEquals($format, $field_test_format_type->getValue());
    $assert_session->responseContains("$setting_name: $setting_value");

    // Validate the selectbox.
    $this->assertFieldSelectOptions($field_test_format_type, [
      'field_no_settings',
      'field_empty_test',
      'field_empty_setting',
      'field_test_default',
      'field_test_multiple',
      'field_test_with_prepare_view',
      'field_test_applicable',
    ]);

    // Ensure that fields can be hidden directly by dragging the element.
    $target = $page->find('css', '.region-hidden-message');
    $field_test_drag_handle->dragTo($target);
    $assert_session->assertWaitOnAjaxRequest();

    $button_save->click();

    // Validate the changed display settings on the server.
    /** @var \Drupal\Core\Entity\Display\EntityViewDisplayInterface $display */
    $display = $display_storage->loadUnchanged($display_id);
    $this->assertNull($display->getComponent('field_test'));

    // Switch to manual mode.
    $weight_toggle->click();
    $field_region = $page->findField('fields[field_test][region]');

    // Change the region to content using the region field.
    $this->assertEquals('hidden', $field_region->getValue());
    $field_region->setValue('content');
    $assert_session->assertWaitOnAjaxRequest();
    $button_save->click();

    // Change the format for the test field.
    $field_test_format_type->setValue('field_test_multiple');
    $assert_session->assertWaitOnAjaxRequest();
    $plugin_summary = $page->find('css', '#field-test .field-plugin-summary');
    $this->assertStringContainsString("test_formatter_setting_multiple: dummy test string", $plugin_summary->getText(), 'The expected summary is displayed.');

    // Submit the form and assert that
    // hook_field_formatter_settings_summary_alter() is called.
    $button_save->click();
    $assert_session->responseContains('field_test_field_formatter_settings_summary_alter');

    // Open the settings form for the test field.
    $field_test_settings->click();
    $assert_session->assertWaitOnAjaxRequest();

    // Assert that the field added in
    // field_test_field_formatter_third_party_settings_form() is present.
    $field_third_party = $page->findField('fields[field_test][settings_edit_form][third_party_settings][field_third_party_test][field_test_field_formatter_third_party_settings_form]');
    $this->assertNotEmpty($field_third_party, 'The field added in hook_field_formatter_third_party_settings_form() is present on the settings form.');

    // Change the value and submit the form to save the third party settings.
    $field_third_party->setValue('foo');
    $page->findButton('Update')->click();
    $assert_session->assertWaitOnAjaxRequest();
    $button_save->click();

    // Assert the third party settings.
    \Drupal::service('entity_field.manager')->clearCachedFieldDefinitions();
    $this->drupalGet($manage_display);

    $id = 'node.' . $this->type . '.default';
    /** @var \Drupal\Core\Entity\Display\EntityViewDisplayInterface $display */
    $display = $display_storage->loadUnchanged($id);
    $this->assertEquals($display->getRenderer('field_test')->getThirdPartySetting('field_third_party_test', 'field_test_field_formatter_third_party_settings_form'), 'foo');
    $this->assertContains('field_third_party_test', $display->calculateDependencies()->getDependencies()['module'], 'The display has a dependency on field_third_party_test module.');

    // Change the formatter to an empty setting and validate it's initialized
    // correctly.
    $field_test_format_type = $page->findField('fields[field_test][type]');
    $field_test_format_type->setValue('field_empty_setting');
    $assert_session->assertWaitOnAjaxRequest();
    $assert_session->responseNotContains('Default empty setting now has a value.');
    $this->assertTrue($field_test_settings->isVisible(), TRUE);

    // Set the empty_setting option to a non-empty value again and validate
    // the formatting summary now display's this correctly.
    $field_test_settings->click();
    $assert_session->assertWaitOnAjaxRequest();
    $field_empty_setting = $page->findField('fields[field_test][settings_edit_form][settings][field_empty_setting]');
    $field_empty_setting->setValue('non empty setting');
    $page->findButton('Update')->click();
    $assert_session->assertWaitOnAjaxRequest();
    $assert_session->responseContains('Default empty setting now has a value.');

    // Test the settings form behavior. An edit button should be present since
    // there are third party settings to configure.
    $field_test_format_type->setValue('field_no_settings');
    $assert_session->assertWaitOnAjaxRequest();
    $this->assertTrue($field_test_settings->isVisible());

    // Make sure we can save the third party settings when there are no settings
    // available.
    $field_test_settings->click();
    $assert_session->assertWaitOnAjaxRequest();
    $page->findButton('Update')->click();
    $assert_session->assertWaitOnAjaxRequest();

    // When a module providing third-party settings to a formatter (or widget)
    // is uninstalled, the formatter remains enabled but the provided settings,
    // together with the corresponding form elements, are removed from the
    // display component.
    \Drupal::service('module_installer')->uninstall(['field_third_party_test']);

    // Ensure the button is still there after the module has been disabled.
    $this->drupalGet($manage_display);
    $this->assertTrue($field_test_settings->isVisible(), TRUE);

    // Ensure that third-party form elements are not present anymore.
    $field_test_settings->click();
    $assert_session->assertWaitOnAjaxRequest();
    $field_third_party = $page->findField('fields[field_test][settings_edit_form][third_party_settings][field_third_party_test][field_test_field_formatter_third_party_settings_form]');
    $this->assertEmpty($field_third_party);

    // Ensure that third-party settings were removed from the formatter.
    /** @var \Drupal\Core\Entity\Display\EntityViewDisplayInterface $display */
    $display = $display_storage->loadUnchanged($display_id);
    $component = $display->getComponent('field_test');
    $this->assertArrayNotHasKey('field_third_party_test', $component['third_party_settings']);
  }

  /**
   * Tests widget settings.
   */
  public function testWidgetUI() {
    // Admin Manage Fields page.
    $manage_fields = 'admin/structure/types/manage/' . $this->type;
    // Admin Manage Display page.
    $manage_display = $manage_fields . '/form-display';

    $form_storage = $this->entity_type_manager->getStorage('entity_form_display');

    // Creates a new field that can be used with multiple formatters.
    // Reference: Drupal\field_test\Plugin\Field\FieldWidget\TestFieldWidgetMultiple::isApplicable().
    $this->fieldUIAddNewField($manage_fields, 'test', 'Test field');

    // Get the display options (formatter and settings) that were automatically
    // assigned for the 'default' display.
    /** @var \Drupal\Core\Entity\Display\EntityFormDisplayInterface $display */
    $display = $form_storage->loadUnchanged("node.{$this->type}.default");
    $display_options = $display->getComponent('field_test');
    $widget_type = $display_options['type'];
    $default_settings = \Drupal::service('plugin.manager.field.widget')->getDefaultSettings($widget_type);
    $setting_name = key($default_settings);
    $setting_value = $display_options['settings'][$setting_name];

    // Display the "Manage form display" screen and check if the expected
    // widget is selected.
    $this->drupalGet($manage_display);

    $session = $this->getSession();
    $assert_session = $this->assertSession();
    $page = $session->getPage();

    $field_test_settings = $page->find('css', 'input[name="field_test_settings_edit"]');
    $field_test_type = $page->findField('fields[field_test][type]');
    $button_save = $page->findButton('Save');

    $this->assertEquals($widget_type, $field_test_type->getValue(), 'The expected widget is selected.');
    $assert_session->responseContains("$setting_name: $setting_value");

    // Check whether widget weights are respected.
    $this->assertFieldSelectOptions($field_test_type, [
      'test_field_widget',
      'test_field_widget_multilingual',
      'test_field_widget_multiple',
    ]);

    $field_test_type->setValue('test_field_widget_multiple');
    $assert_session->assertWaitOnAjaxRequest();
    $button_save->click();

    $this->drupalGet($manage_display);
    $widget_type = 'test_field_widget_multiple';
    $default_settings = \Drupal::service('plugin.manager.field.widget')->getDefaultSettings($widget_type);
    $setting_name = key($default_settings);
    $setting_value = $default_settings[$setting_name];
    $this->assertEquals($widget_type, $field_test_type->getValue(), 'The expected widget is selected.');
    $assert_session->responseContains("$setting_name: $setting_value");
    $button_save->click();

    /** @var \Drupal\Core\Entity\Display\EntityFormDisplayInterface $display */
    $display = $form_storage->loadUnchanged("node.{$this->type}.default");
    $display_options = $display->getComponent('field_test');
    $current_widget = $display_options['type'];
    $current_setting_value = $display_options['settings'][$setting_name];
    $this->assertEquals($current_widget, $widget_type, 'The widget was updated.');
    $this->assertEquals($current_setting_value, $setting_value, 'The setting was updated.');

    // Assert that hook_field_widget_settings_summary_alter() is called.
    $assert_session->responseContains('field_test_field_widget_settings_summary_alter');

    $field_test_settings->click();
    $assert_session->assertWaitOnAjaxRequest();

    // Assert that the field added in
    // field_test_field_widget_third_party_settings_form() is present.
    $field_third_party_test = $page->findField('fields[field_test][settings_edit_form][third_party_settings][field_third_party_test][field_test_widget_third_party_settings_form]');
    $this->assertNotEmpty($field_third_party_test, 'The field added in hook_field_widget_third_party_settings_form() is present on the settings form.');
    $field_third_party_test->setValue('foo');
    $page->findButton('Update')->click();
    $assert_session->assertWaitOnAjaxRequest();

    $button_save->click();
    $this->drupalGet($manage_display);

    // Assert the third party settings.
    \Drupal::service('entity_field.manager')->clearCachedFieldDefinitions();

    /** @var \Drupal\Core\Entity\Display\EntityFormDisplayInterface $display */
    $display = $form_storage->loadUnchanged('node.' . $this->type . '.default');
    $this->assertEquals($display->getRenderer('field_test')->getThirdPartySetting('field_third_party_test', 'field_test_widget_third_party_settings_form'), 'foo');
    $this->assertContains('field_third_party_test', $display->calculateDependencies()->getDependencies()['module'], 'Form display does not have a dependency on field_third_party_test module.');

    // Creates a new field that can not be used with the multiple formatter.
    // Reference: Drupal\field_test\Plugin\Field\FieldWidget\TestFieldWidgetMultiple::isApplicable().
    $this->fieldUIAddNewField($manage_fields, 'onewidgetfield', 'One Widget Field');

    // Go to the Manage Form Display.
    $this->drupalGet($manage_display);

    $field_onewidgetfield_type = $page->findField('fields[field_onewidgetfield][type]');
    $field_test_drag_handle = $page->find('css', '#field-test .tabledrag-handle');
    $field_region = $page->findField('fields[field_test][region]');
    $weight_toggle = $page->find('css', '.tabledrag-toggle-weight');
    $target = $page->find('css', '.region-hidden-message');

    // Checks if the select elements contain the specified options.
    $this->assertFieldSelectOptions($field_test_type, [
      'test_field_widget',
      'test_field_widget_multilingual',
      'test_field_widget_multiple',
    ]);
    $this->assertFieldSelectOptions($field_onewidgetfield_type, [
      'test_field_widget',
      'test_field_widget_multilingual',
    ]);

    $field_test_drag_handle->dragTo($target);
    $assert_session->assertWaitOnAjaxRequest();
    $button_save->click();

    // Validate the changed display settings on the server.
    /** @var \Drupal\Core\Entity\Display\EntityFormDisplayInterface $display */
    $display = $form_storage->loadUnchanged("node.{$this->type}.default");
    $this->assertNull($display->getComponent('field_test'));

    // Switch to manual mode.
    $weight_toggle->click();

    // Change the region to content using the region field.
    $this->assertEquals('hidden', $field_region->getValue());
    $field_region->setValue('content');
    $assert_session->assertWaitOnAjaxRequest();
    $button_save->click();

    // Validate the change on the server.
    $this->drupalGet($manage_display);
    $display = EntityFormDisplay::load("node.{$this->type}.default");
    $this->assertNotNull($display->getComponent('field_test'));
  }

  /**
   * Checks if a select element contains the specified options.
   *
   * @param \Behat\Mink\Element\NodeElement $field
   *   The select field to validate.
   * @param array $expected_options
   *   An array of expected options.
   * @param null $selected
   *   The default value to validate.
   */
  protected function assertFieldSelectOptions($field, array $expected_options, $selected = NULL) {
    /** @var \Behat\Mink\Element\NodeElement[] $select_options */
    $select_options = $field->findAll('xpath', 'option');

    // Validate the number of options.
    $this->assertCount(count($expected_options), $select_options);

    // Validate the options and expected order.
    foreach ($select_options as $key => $option) {
      $this->assertEquals($option->getAttribute('value'), $expected_options[$key]);
    }

    // Validate the default value if passed.
    if (!is_null($selected)) {
      $this->assertEquals($selected, $field->getValue());
    }
  }

  /**
   * Creates a new field through the Field UI.
   *
   * @param string $bundle_path
   *   Admin path of the bundle that the new field is to be attached to.
   * @param string $field_name
   *   The field name of the new field storage.
   * @param string $label
   *   (optional) The label of the new field. Defaults to a random string.
   * @param string $field_type
   *   (optional) The field type of the new field storage. Defaults to
   *   'test_field'.
   */
  public function fieldUIAddNewField($bundle_path, $field_name, $label = NULL, $field_type = 'test_field') {
    $label = $label ?: $field_name;

    // Allow the caller to set a NULL path in case they navigated to the right
    // page before calling this method.
    if ($bundle_path !== NULL) {
      $bundle_path = "$bundle_path/fields/add-field";
    }

    // First step: 'Add field' page.
    $this->drupalGet($bundle_path);

    $session = $this->getSession();

    $page = $session->getPage();
    $assert_session = $this->assertSession();

    $field_new_storage_type = $page->findField('new_storage_type');
    $field_new_storage_type->setValue($field_type);
    $assert_session->assertWaitOnAjaxRequest();

    $field_label = $page->findField('label');
    $this->assertTrue($field_label->isVisible());
    $field_label->setValue($label);
    $machine_name = $assert_session->waitForElementVisible('css', '[name="label"] + * .machine-name-value');
    $this->assertNotEmpty($machine_name);
    $page->findButton('Edit')->press();

    $field_field_name = $page->findField('field_name');
    $this->assertTrue($field_field_name->isVisible());
    $field_field_name->setValue($field_name);
    $assert_session->assertWaitOnAjaxRequest();

    $page->findButton(t('Save and continue'))->click();

    $assert_session->responseContains(t('These settings apply to the %label field everywhere it is used.', ['%label' => $label]));
    $breadcrumb_link = $page->findLink($label);

    // Test breadcrumb.
    $this->assertTrue($breadcrumb_link->isVisible());

    // Second step: 'Storage settings' form.
    $page->findButton('Save field settings')->click();
    $assert_session->responseContains(t('Updated field %label field settings.', ['%label' => $label]));

    // Third step: 'Field settings' form.
    $page->findButton('Save settings')->click();
    $assert_session->responseContains(t('Saved %label configuration.', ['%label' => $label]));

    // Check that the field appears in the overview form.
    $row = $page->find('css', '#field-' . $field_name);
    $this->assertNotEmpty($row, 'Field was created and appears in the overview page.');
  }

}