class EntityReferenceAdminTest

class EntityReferenceAdminTest extends WebDriverTestBase {
    use FieldUiTestTrait;
    use FieldUiJSTestTrait;
    
    /**
     * Modules to install.
     *
     * Enable path module to ensure that the selection handler does not fail for
     * entities with a path field.
     *
     * @var array
     */
    protected static $modules = [
        'node',
        'field_ui',
        'path',
        'taxonomy',
        'block',
        'views_ui',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * The name of the content type created for testing purposes.
     *
     * @var string
     */
    protected $type;
    
    /**
     * Name of a second content type to be used as a target of entity references.
     *
     * @var string
     */
    protected $targetType;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->drupalPlaceBlock('system_breadcrumb_block');
        // Create a content type, with underscores.
        $type_name = $this->randomMachineName(8) . '_test';
        $type = $this->drupalCreateContentType([
            'name' => $type_name,
            'type' => $type_name,
        ]);
        $this->type = $type->id();
        // Create a second content type, to be a target for entity reference fields.
        $type_name = $this->randomMachineName(8) . '_test';
        $type = $this->drupalCreateContentType([
            'name' => $type_name,
            'type' => $type_name,
        ]);
        $this->targetType = $type->id();
        // Change the title field label.
        $fields = \Drupal::service('entity_field.manager')->getFieldDefinitions('node', $type->id());
        $fields['title']->getConfig($type->id())
            ->setLabel($type->id() . ' title')
            ->save();
        // Add text field to the second content type.
        FieldStorageConfig::create([
            'field_name' => 'field_text',
            'entity_type' => 'node',
            'type' => 'text',
            'entity_types' => [
                'node',
            ],
        ])->save();
        FieldConfig::create([
            'label' => 'Text Field',
            'field_name' => 'field_text',
            'entity_type' => 'node',
            'bundle' => $this->targetType,
            'settings' => [],
            'required' => FALSE,
        ])
            ->save();
        // Create test user.
        $admin_user = $this->drupalCreateUser([
            'access content',
            'administer node fields',
            'administer node display',
            'administer views',
            'create ' . $this->type . ' content',
            'edit own ' . $this->type . ' content',
        ]);
        $this->drupalLogin($admin_user);
    }
    
    /**
     * Tests the Entity Reference Admin UI.
     */
    public function testFieldAdminHandler() : void {
        $bundle_path = 'admin/structure/types/manage/' . $this->type;
        $page = $this->getSession()
            ->getPage();
        
        /** @var \Drupal\FunctionalJavascriptTests\JSWebAssert $assert_session */
        $assert_session = $this->assertSession();
        // First step: 'Add new field' on the 'Manage fields' page.
        $this->drupalGet($bundle_path . '/fields/add-field');
        // Check if the commonly referenced entity types appear in the list.
        $page->find('css', "[name='new_storage_type'][value='reference']")
            ->getParent()
            ->click();
        $page->pressButton('Continue');
        $assert_session->pageTextContains('Choose an option below');
        $this->assertSession()
            ->elementExists('css', "[name='group_field_options_wrapper'][value='field_ui:entity_reference:node']");
        $this->assertSession()
            ->elementExists('css', "[name='group_field_options_wrapper'][value='field_ui:entity_reference:user']");
        $page->pressButton('Back');
        $this->fieldUIAddNewFieldJS(NULL, 'test', 'Test', 'entity_reference', FALSE);
        // Node should be selected by default.
        $this->assertSession()
            ->fieldValueEquals('field_storage[subform][settings][target_type]', 'node');
        // Check that all entity types can be referenced.
        $this->assertFieldSelectOptions('field_storage[subform][settings][target_type]', array_keys(\Drupal::entityTypeManager()->getDefinitions()));
        // The base handler should be selected by default.
        $this->assertSession()
            ->fieldValueEquals('settings[handler]', 'default:node');
        // The base handler settings should be displayed.
        $entity_type_id = 'node';
        // Check that the type label is correctly displayed.
        $assert_session->pageTextContains('Content type');
        // Check that sort options are not yet visible.
        $sort_by = $page->findField('settings[handler_settings][sort][field]');
        $this->assertNotEmpty($sort_by);
        $this->assertFalse($sort_by->isVisible(), 'The "sort by" options are hidden.');
        $bundles = $this->container
            ->get('entity_type.bundle.info')
            ->getBundleInfo($entity_type_id);
        foreach ($bundles as $bundle_name => $bundle_info) {
            $this->assertSession()
                ->fieldExists('settings[handler_settings][target_bundles][' . $bundle_name . ']');
        }
        reset($bundles);
        // Initially, no bundles are selected so no sort options are available.
        $this->assertFieldSelectOptions('settings[handler_settings][sort][field]', [
            '_none',
        ]);
        // Select this bundle so that standard sort options are available.
        $page->findField('settings[handler_settings][target_bundles][' . $this->type . ']')
            ->setValue($this->type);
        $assert_session->assertWaitOnAjaxRequest();
        // Test that a non-translatable base field is a sort option.
        $assert_session->optionExists('settings[handler_settings][sort][field]', 'nid');
        // Test that a translatable base field is a sort option.
        $assert_session->optionExists('settings[handler_settings][sort][field]', 'title');
        // Test that a configurable field is a sort option.
        $assert_session->optionExists('settings[handler_settings][sort][field]', 'body.value');
        // Test that a field not on this bundle is not a sort option.
        $assert_session->optionNotExists('settings[handler_settings][sort][field]', 'field_text.value');
        // Test that the title option appears once, with the default label.
        $title_options = $sort_by->findAll('xpath', 'option[@value="title"]');
        $this->assertEquals(1, count($title_options));
        $this->assertEquals('Title', $title_options[0]->getText());
        // Also select the target bundle so that field_text is also available.
        $page->findField('settings[handler_settings][target_bundles][' . $this->targetType . ']')
            ->setValue($this->targetType);
        $assert_session->assertWaitOnAjaxRequest();
        $assert_session->optionExists('settings[handler_settings][sort][field]', 'nid');
        $assert_session->optionExists('settings[handler_settings][sort][field]', 'title');
        $assert_session->optionExists('settings[handler_settings][sort][field]', 'body.value');
        $assert_session->optionExists('settings[handler_settings][sort][field]', 'field_text.value');
        // Select only the target bundle. The options should be the same.
        $page->findField('settings[handler_settings][target_bundles][' . $this->type . ']')
            ->uncheck();
        $assert_session->assertWaitOnAjaxRequest();
        $assert_session->optionExists('settings[handler_settings][sort][field]', 'nid');
        $assert_session->optionExists('settings[handler_settings][sort][field]', 'title');
        $assert_session->optionExists('settings[handler_settings][sort][field]', 'body.value');
        $assert_session->optionExists('settings[handler_settings][sort][field]', 'field_text.value');
        // Exception: the title option has a different label.
        $title_options = $sort_by->findAll('xpath', 'option[@value="title"]');
        $this->assertEquals(1, count($title_options));
        $this->assertEquals($this->targetType . ' title', $title_options[0]->getText());
        // Test the sort settings.
        // Option 0: no sort.
        $this->assertSession()
            ->fieldValueEquals('settings[handler_settings][sort][field]', '_none');
        $sort_direction = $page->findField('settings[handler_settings][sort][direction]');
        $this->assertFalse($sort_direction->isVisible());
        // Option 1: sort by field.
        $sort_by->setValue('nid');
        $assert_session->assertWaitOnAjaxRequest();
        $this->assertTrue($sort_direction->isVisible());
        $this->assertSession()
            ->fieldValueEquals('settings[handler_settings][sort][direction]', 'ASC');
        // Test that the sort-by options are sorted.
        $labels = array_map(function (NodeElement $element) {
            return $element->getText();
        }, $sort_by->findAll('xpath', 'option'));
        for ($i = count($labels) - 1, $sorted = TRUE; $i > 0; --$i) {
            if ($labels[$i - 1] > $labels[$i]) {
                $sorted = FALSE;
                break;
            }
        }
        $this->assertTrue($sorted, 'The "sort by" options are sorted.');
        // Set back to no sort.
        $sort_by->setValue('_none');
        $assert_session->assertWaitOnAjaxRequest();
        $this->assertFalse($sort_direction->isVisible());
        // Sort by nid, then select no bundles. The sort fields and sort direction
        // should not display.
        $sort_by->setValue('nid');
        $assert_session->assertWaitOnAjaxRequest();
        foreach ($bundles as $bundle_name => $bundle_info) {
            $this->assertSession()
                ->fieldExists('settings[handler_settings][target_bundles][' . $bundle_name . ']');
            $checkbox = $page->findField('settings[handler_settings][target_bundles][' . $bundle_name . ']');
            if ($checkbox->isChecked()) {
                $checkbox->uncheck();
                $assert_session->assertWaitOnAjaxRequest();
            }
        }
        $this->assertFalse($sort_by->isVisible(), 'The "sort by" options are hidden.');
        $this->assertFalse($sort_direction->isVisible());
        // Select a bundle and check the same two fields.
        $page->findField('settings[handler_settings][target_bundles][' . $this->targetType . ']')
            ->setValue($this->targetType);
        $assert_session->assertWaitOnAjaxRequest();
        $this->assertTrue($sort_by->isVisible(), 'The "sort by" options are visible.');
        $assert_session->optionExists('settings[handler_settings][sort][field]', 'field_text.value');
        // Un-select the bundle and check the same two fields.
        $page->findField('settings[handler_settings][target_bundles][' . $this->targetType . ']')
            ->uncheck();
        $assert_session->assertWaitOnAjaxRequest();
        $this->assertFalse($sort_by->isVisible(), 'The "sort by" options are hidden yet again.');
        $this->assertFieldSelectOptions('settings[handler_settings][sort][field]', [
            '_none',
        ]);
        // Third step: confirm.
        $page->findField('settings[handler_settings][target_bundles][' . $this->targetType . ']')
            ->setValue($this->targetType);
        $assert_session->assertWaitOnAjaxRequest();
        $this->submitForm([
            'required' => '1',
        ], 'Save settings');
        // Check that the field appears in the overview form.
        $this->assertSession()
            ->elementTextContains('xpath', '//table[@id="field-overview"]//tr[@id="field-test"]/td[1]', "Test");
        // Check that the field settings form can be submitted again, even when the
        // field is required.
        // The first 'Edit' link is for the Body field.
        $this->clickLink('Edit', 1);
        $this->submitForm([], 'Save settings');
        // Switch the target type to 'taxonomy_term' and check that the settings
        // specific to its selection handler are displayed.
        $field_name = 'node.' . $this->type . '.field_test';
        $this->drupalGet($bundle_path . '/fields/' . $field_name);
        $page->findField('field_storage[subform][settings][target_type]')
            ->setValue('taxonomy_term');
        $this->assertSession()
            ->assertWaitOnAjaxRequest();
        $this->assertSession()
            ->fieldExists('settings[handler_settings][auto_create]');
        $this->assertSession()
            ->fieldValueEquals('settings[handler]', 'default:taxonomy_term');
        // Switch the target type to 'user' and check that the settings specific to
        // its selection handler are displayed.
        $field_name = 'node.' . $this->type . '.field_test';
        $this->drupalGet($bundle_path . '/fields/' . $field_name);
        $target_type_input = $assert_session->fieldExists('field_storage[subform][settings][target_type]');
        $target_type_input->setValue('user');
        $assert_session->assertWaitOnAjaxRequest();
        $this->assertSession()
            ->fieldValueEquals('settings[handler_settings][filter][type]', '_none');
        $this->assertSession()
            ->fieldValueEquals('settings[handler_settings][sort][field]', '_none');
        $assert_session->optionNotExists('settings[handler_settings][sort][field]', 'nid');
        $assert_session->optionExists('settings[handler_settings][sort][field]', 'uid');
        // Check that sort direction is visible only when a sort field is selected.
        $sort_direction = $page->findField('settings[handler_settings][sort][direction]');
        $this->assertFalse($sort_direction->isVisible());
        $sort_by->setValue('name');
        $assert_session->assertWaitOnAjaxRequest();
        $this->assertTrue($sort_direction->isVisible());
        // Switch the target type to 'node'.
        $field_name = 'node.' . $this->type . '.field_test';
        $this->drupalGet($bundle_path . '/fields/' . $field_name);
        $page->findField('field_storage[subform][settings][target_type]')
            ->setValue('node');
        // Try to select the views handler.
        $this->drupalGet($bundle_path . '/fields/' . $field_name);
        $page->findField('settings[handler]')
            ->setValue('views');
        $views_text = (string) new FormattableMarkup('No eligible views were found. <a href=":create">Create a view</a> with an <em>Entity Reference</em> display, or add such a display to an <a href=":existing">existing view</a>.', [
            ':create' => Url::fromRoute('views_ui.add')->toString(),
            ':existing' => Url::fromRoute('entity.view.collection')->toString(),
        ]);
        $assert_session->waitForElement('xpath', '//a[contains(text(), "Create a view")]');
        $assert_session->responseContains($views_text);
        $this->submitForm([], 'Save settings');
        // If no eligible view is available we should see a message.
        $assert_session->pageTextContains('The views entity selection mode requires a view.');
        // Enable the entity_reference_test module which creates an eligible view.
        $this->container
            ->get('module_installer')
            ->install([
            'entity_reference_test',
        ]);
        $this->resetAll();
        $this->drupalGet($bundle_path . '/fields/' . $field_name);
        $page->findField('settings[handler]')
            ->setValue('views');
        $assert_session->waitForField('settings[handler_settings][view][view_and_display]')
            ->setValue('test_entity_reference:entity_reference_1');
        $this->submitForm([], 'Save settings');
        $assert_session->pageTextContains('Saved Test configuration.');
        // Switch the target type to 'entity_test'.
        $this->drupalGet($bundle_path . '/fields/' . $field_name);
        $page->findField('field_storage[subform][settings][target_type]')
            ->setValue('entity_test');
        $assert_session->assertWaitOnAjaxRequest();
        $page->findField('settings[handler]')
            ->setValue('views');
        $page->findField('settings[handler_settings][view][view_and_display]')
            ->selectOption('test_entity_reference_entity_test:entity_reference_1');
        $edit = [
            'required' => FALSE,
        ];
        $this->submitForm($edit, 'Save settings');
        $assert_session->pageTextContains('Saved Test configuration.');
    }
    
    /**
     * Checks if a select element contains the specified options.
     *
     * @param string $name
     *   The field name.
     * @param array $expected_options
     *   An array of expected options.
     *
     * @internal
     */
    protected function assertFieldSelectOptions(string $name, array $expected_options) : void {
        $field = $this->assertSession()
            ->selectExists($name);
        $options = $field->findAll('xpath', 'option');
        $optgroups = $field->findAll('xpath', 'optgroup');
        $nested_options = [];
        foreach ($optgroups as $optgroup) {
            $nested_options[] = $optgroup->findAll('xpath', 'option');
        }
        $options = array_merge($options, ...$nested_options);
        array_walk($options, function (NodeElement &$option) {
            $option = $option->getAttribute('value');
        });
        $this->assertEqualsCanonicalizing($expected_options, $options);
    }

}