class EntityReferenceAdminTest

class EntityReferenceAdminTest extends BrowserTestBase {
    use FieldUiTestTrait;
    
    /**
     * Modules to install.
     *
     * Enable path module to ensure that the selection handler does not fail for
     * entities with a path field.
     * Enable views_ui module to see the no_view_help text.
     *
     * @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;
    
    /**
     * {@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 test user.
        $admin_user = $this->drupalCreateUser([
            'access content',
            'administer node fields',
            'administer node display',
            'administer views',
            'create ' . $type_name . ' content',
            'edit own ' . $type_name . ' content',
        ]);
        $this->drupalLogin($admin_user);
    }
    
    /**
     * Tests the Entity Reference Admin UI.
     */
    public function testFieldAdminHandler() : void {
        $bundle_path = 'admin/structure/types/manage/' . $this->type;
        // Create a new view and display it as an entity reference.
        $edit = [
            'id' => 'node_test_view',
            'label' => 'Node Test View',
            'show[wizard_key]' => 'node',
            'show[sort]' => 'none',
            'page[create]' => 1,
            'page[title]' => 'Test Node View',
            'page[path]' => 'test/node/view',
            'page[style][style_plugin]' => 'default',
            'page[style][row_plugin]' => 'fields',
        ];
        $this->drupalGet('admin/structure/views/add');
        $this->submitForm($edit, 'Save and edit');
        $this->submitForm([], 'Duplicate as Entity Reference');
        $this->clickLink('Settings');
        $edit = [
            'style_options[search_fields][title]' => 'title',
        ];
        $this->submitForm($edit, 'Apply');
        // Set sort to NID ascending.
        $edit = [
            'name[node_field_data.nid]' => 1,
        ];
        $this->drupalGet('admin/structure/views/nojs/add-handler/node_test_view/entity_reference_1/sort');
        $this->submitForm($edit, 'Add and configure sort criteria');
        $this->submitForm([], 'Apply');
        $this->drupalGet('admin/structure/views/view/node_test_view/edit/entity_reference_1');
        $this->submitForm([], 'Save');
        $this->clickLink('Settings');
        // Create a test entity reference field.
        $field_name = 'test_entity_ref_field';
        $this->fieldUIAddNewField($bundle_path, $field_name, 'Test Entity Reference Field', 'field_ui:entity_reference:node', [], [], FALSE);
        // Set to unlimited.
        $edit = [
            'field_storage[subform][cardinality]' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
        ];
        $this->submitForm($edit, 'Update settings');
        // Add the view to the test field.
        $edit = [
            'settings[handler]' => 'views',
        ];
        $this->submitForm($edit, 'Change handler');
        $edit = [
            'required' => FALSE,
            'settings[handler_settings][view][view_and_display]' => 'node_test_view:entity_reference_1',
        ];
        $this->submitForm($edit, 'Save settings');
        $this->assertSession()
            ->statusMessageContains("Saved Test Entity Reference Field configuration.", MessengerInterface::TYPE_STATUS);
        $this->assertFieldExistsOnOverview('Test Entity Reference Field');
        // Create nodes.
        $node1 = Node::create([
            'type' => $this->type,
            'title' => 'Foo Node',
        ]);
        $node1->save();
        $node2 = Node::create([
            'type' => $this->type,
            'title' => 'Foo Node',
        ]);
        $node2->save();
        // Try to add a new node and fill the entity reference field.
        $this->drupalGet('node/add/' . $this->type);
        $field = $this->assertSession()
            ->fieldExists('field_test_entity_ref_field[0][target_id]');
        $this->assertStringContainsString("/entity_reference_autocomplete/node/views/", $field->getAttribute('data-autocomplete-path'));
        $target_url = $this->getAbsoluteUrl($field->getAttribute('data-autocomplete-path'));
        $this->drupalGet($target_url, [
            'query' => [
                'q' => 'Foo',
            ],
        ]);
        $this->assertSession()
            ->pageTextContains($node1->getTitle() . ' (' . $node1->id() . ')');
        $this->assertSession()
            ->pageTextContains($node2->getTitle() . ' (' . $node2->id() . ')');
        // Try to add a new node, fill the entity reference field and submit the
        // form.
        $this->drupalGet('node/add/' . $this->type);
        $this->submitForm([], 'Add another item');
        $edit = [
            'title[0][value]' => 'Example',
            'field_test_entity_ref_field[0][target_id]' => 'Foo Node (' . $node1->id() . ')',
            'field_test_entity_ref_field[1][target_id]' => 'Foo Node (' . $node2->id() . ')',
        ];
        $this->submitForm($edit, 'Save');
        $this->assertSession()
            ->statusCodeEquals(200);
        $edit = [
            'title[0][value]' => 'Example',
            'field_test_entity_ref_field[0][target_id]' => 'Test',
        ];
        $this->drupalGet('node/add/' . $this->type);
        $this->submitForm($edit, 'Save');
        // Assert that entity reference autocomplete field is validated.
        $this->assertSession()
            ->pageTextContains('There are no content items matching "Test"');
        $edit = [
            'title[0][value]' => 'Test',
            'field_test_entity_ref_field[0][target_id]' => $node1->getTitle(),
        ];
        $this->drupalGet('node/add/' . $this->type);
        $this->submitForm($edit, 'Save');
        // Assert the results multiple times to avoid sorting problem of nodes with
        // the same title.
        $this->assertSession()
            ->pageTextContains('Multiple content items match this reference;');
        $this->assertSession()
            ->pageTextContains($node1->getTitle() . ' (' . $node1->id() . ')');
        $this->assertSession()
            ->pageTextContains($node2->getTitle() . ' (' . $node2->id() . ')');
        $this->assertSession()
            ->pageTextContains('Specify the one you want by appending the id in parentheses, like "' . $node2->getTitle() . ' (' . $node2->id() . ')' . '".');
        $edit = [
            'title[0][value]' => 'Test',
            'field_test_entity_ref_field[0][target_id]' => $node1->getTitle() . ' (' . $node1->id() . ')',
        ];
        $this->drupalGet('node/add/' . $this->type);
        $this->submitForm($edit, 'Save');
        $this->assertSession()
            ->linkExists($node1->getTitle());
        // Tests adding default values to autocomplete widgets.
        Vocabulary::create([
            'vid' => 'tags',
            'name' => 'tags',
        ])->save();
        $taxonomy_term_field_name = $this->createEntityReferenceField('taxonomy_term', [
            'tags',
        ]);
        $field_path = 'node.' . $this->type . '.field_' . $taxonomy_term_field_name;
        $this->drupalGet($bundle_path . '/fields/' . $field_path);
        $edit = [
            'field_storage[subform][cardinality]' => -1,
        ];
        $this->submitForm($edit, 'Update settings');
        // Assert that the target bundle handler setting is initially set.
        $this->assertSession()
            ->checkboxChecked('settings[handler_settings][target_bundles][tags]');
        // Change the handler to 'views'.
        $this->submitForm([
            'settings[handler]' => 'views',
        ], 'Change handler');
        $this->assertSession()
            ->fieldValueEquals('settings[handler]', 'views');
        // Change handler back to 'default'.
        $this->submitForm([
            'settings[handler]' => 'default:taxonomy_term',
        ], 'Change handler');
        // Assert that changing the handler resets the handler settings.
        $this->assertSession()
            ->checkboxNotChecked('settings[handler_settings][target_bundles][tags]');
        $term_name = $this->randomString();
        $result = \Drupal::entityQuery('taxonomy_term')->condition('name', $term_name)
            ->condition('vid', 'tags')
            ->accessCheck(FALSE)
            ->execute();
        $this->assertCount(0, $result, "No taxonomy terms exist with the name '{$term_name}'.");
        $edit = [
            'settings[handler_settings][target_bundles][tags]' => TRUE,
            // This must be set before new entities will be auto-created.
'settings[handler_settings][auto_create]' => 1,
        ];
        $this->submitForm($edit, 'Save settings');
        $this->assertFieldExistsOnOverview($taxonomy_term_field_name);
        $this->drupalGet($bundle_path . '/fields/' . $field_path);
        $edit = [
            'set_default_value' => '1',
            // A term that doesn't yet exist.
'default_value_input[field_' . $taxonomy_term_field_name . '][0][target_id]' => $term_name,
        ];
        $this->submitForm($edit, 'Save settings');
        $this->assertFieldExistsOnOverview($taxonomy_term_field_name);
        // The term should now exist.
        $result = \Drupal::entityQuery('taxonomy_term')->condition('name', $term_name)
            ->condition('vid', 'tags')
            ->accessCheck(FALSE)
            ->execute();
        $this->assertCount(1, $result, 'Taxonomy term was auto created when set as field default.');
    }
    
    /**
     * Tests the formatters for the Entity References.
     */
    public function testAvailableFormatters() : void {
        // Create a new vocabulary.
        Vocabulary::create([
            'vid' => 'tags',
            'name' => 'tags',
        ])->save();
        // Create entity reference field with taxonomy term as a target.
        $taxonomy_term_field_name = $this->createEntityReferenceField('taxonomy_term', [
            'tags',
        ]);
        // Create entity reference field with user as a target.
        $user_field_name = $this->createEntityReferenceField('user');
        // Create entity reference field with node as a target.
        $node_field_name = $this->createEntityReferenceField('node', [
            $this->type,
        ]);
        // Create entity reference field with date format as a target.
        $date_format_field_name = $this->createEntityReferenceField('date_format');
        // Display all newly created Entity Reference configuration.
        $this->drupalGet('admin/structure/types/manage/' . $this->type . '/display');
        // Check for Taxonomy Term select box values.
        // Test if Taxonomy Term Entity Reference Field has the correct formatters.
        $this->assertFieldSelectOptions('fields[field_' . $taxonomy_term_field_name . '][type]', [
            'entity_reference_label',
            'entity_reference_entity_id',
            'entity_reference_rss_category',
            'entity_reference_entity_view',
        ]);
        // Test if User Reference Field has the correct formatters.
        // Author should be available for this field.
        // RSS Category should not be available for this field.
        $this->assertFieldSelectOptions('fields[field_' . $user_field_name . '][type]', [
            'author',
            'entity_reference_entity_id',
            'entity_reference_entity_view',
            'entity_reference_label',
        ]);
        // Test if Node Entity Reference Field has the correct formatters.
        // RSS Category should not be available for this field.
        $this->assertFieldSelectOptions('fields[field_' . $node_field_name . '][type]', [
            'entity_reference_label',
            'entity_reference_entity_id',
            'entity_reference_entity_view',
        ]);
        // Test if Date Format Reference Field has the correct formatters.
        // RSS Category & Entity View should not be available for this field.
        // This could be any field without a ViewBuilder.
        $this->assertFieldSelectOptions('fields[field_' . $date_format_field_name . '][type]', [
            'entity_reference_label',
            'entity_reference_entity_id',
        ]);
    }
    
    /**
     * Tests field settings for an entity reference field.
     *
     * The tested entity reference field has multiple target bundles and is set
     * to auto-create the target entity.
     */
    public function testMultipleTargetBundles() : void {
        
        /** @var \Drupal\taxonomy\Entity\Vocabulary[] $vocabularies */
        $vocabularies = [];
        for ($i = 0; $i < 2; $i++) {
            $vid = $this->randomMachineName();
            $vocabularies[$i] = Vocabulary::create([
                'name' => $this->randomString(),
                'vid' => $vid,
            ]);
            $vocabularies[$i]->save();
        }
        // Create a new field pointing to the first vocabulary.
        $field_name = $this->createEntityReferenceField('taxonomy_term', [
            $vocabularies[0]->id(),
        ]);
        $field_name = "field_{$field_name}";
        $field_id = 'node.' . $this->type . '.' . $field_name;
        $path = 'admin/structure/types/manage/' . $this->type . '/fields/' . $field_id;
        $this->drupalGet($path);
        // Expect that there's no 'auto_create_bundle' selected.
        $this->assertSession()
            ->fieldNotExists('settings[handler_settings][auto_create_bundle]');
        $edit = [
            'settings[handler_settings][target_bundles][' . $vocabularies[1]->id() . ']' => TRUE,
        ];
        // Enable the second vocabulary as a target bundle.
        $this->drupalGet($path);
        $this->submitForm($edit, 'Save settings');
        $this->drupalGet($path);
        // Expect a select element with the two vocabularies as options.
        $this->assertSession()
            ->optionExists('settings[handler_settings][auto_create_bundle]', $vocabularies[0]->id());
        $this->assertSession()
            ->optionExists('settings[handler_settings][auto_create_bundle]', $vocabularies[1]->id());
        $edit = [
            'settings[handler_settings][auto_create]' => TRUE,
            'settings[handler_settings][auto_create_bundle]' => $vocabularies[1]->id(),
        ];
        $this->submitForm($edit, 'Save settings');
        
        /** @var \Drupal\field\Entity\FieldConfig $field_config */
        $field_config = FieldConfig::load($field_id);
        // Expect that the target bundle has been saved in the backend.
        $this->assertEquals($vocabularies[1]->id(), $field_config->getSetting('handler_settings')['auto_create_bundle']);
        // Delete the other bundle. Field config should not be affected.
        $vocabularies[0]->delete();
        $field_config = FieldConfig::load($field_id);
        $this->assertTrue($field_config->getSetting('handler_settings')['auto_create']);
        $this->assertSame($vocabularies[1]->id(), $field_config->getSetting('handler_settings')['auto_create_bundle']);
        // Delete the bundle set for entity auto-creation. Auto-created settings
        // should be reset (no auto-creation).
        $vocabularies[1]->delete();
        $field_config = FieldConfig::load($field_id);
        $this->assertFalse($field_config->getSetting('handler_settings')['auto_create']);
        $this->assertFalse(isset($field_config->getSetting('handler_settings')['auto_create_bundle']));
    }
    
    /**
     * Creates a new Entity Reference fields with a given target type.
     *
     * @param string $target_type
     *   The name of the target type
     * @param string[] $bundles
     *   A list of bundle IDs. Defaults to [].
     *
     * @return string
     *   Returns the generated field name
     */
    protected function createEntityReferenceField($target_type, $bundles = []) {
        // Generates a bundle path for the newly created content type.
        $bundle_path = 'admin/structure/types/manage/' . $this->type;
        // Generate a random field name, must be only lowercase characters.
        $field_name = $this->randomMachineName();
        $storage_edit = $field_edit = [];
        $storage_edit['settings[target_type]'] = $target_type;
        foreach ($bundles as $bundle) {
            $field_edit['settings[handler_settings][target_bundles][' . $bundle . ']'] = TRUE;
        }
        $this->fieldUIAddNewField($bundle_path, $field_name, $field_name, 'entity_reference', $storage_edit, $field_edit);
        // Returns the generated field name.
        return $field_name;
    }
    
    /**
     * 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 {
        $options = $this->assertSession()
            ->selectExists($name)
            ->findAll('xpath', 'option');
        array_walk($options, function (NodeElement &$option) {
            $option = $option->getValue();
        });
        $this->assertEqualsCanonicalizing($expected_options, $options);
    }

}