class EntityReferenceAutoCreateTest

class EntityReferenceAutoCreateTest extends BrowserTestBase {
    use EntityReferenceTestTrait;
    protected static $modules = [
        'node',
        'taxonomy',
        'entity_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * The name of a content type that will reference $referencedType.
     *
     * @var string
     */
    protected $referencingType;
    
    /**
     * The name of a content type that will be referenced by $referencingType.
     *
     * @var string
     */
    protected $referencedType;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Create "referencing" and "referenced" node types.
        $referencing = $this->drupalCreateContentType();
        $this->referencingType = $referencing->id();
        $referenced = $this->drupalCreateContentType();
        $this->referencedType = $referenced->id();
        FieldStorageConfig::create([
            'field_name' => 'test_field',
            'entity_type' => 'node',
            'translatable' => FALSE,
            'entity_types' => [],
            'settings' => [
                'target_type' => 'node',
            ],
            'type' => 'entity_reference',
            'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
        ])->save();
        FieldConfig::create([
            'label' => 'Entity reference field',
            'field_name' => 'test_field',
            'entity_type' => 'node',
            'bundle' => $referencing->id(),
            'settings' => [
                'handler' => 'default',
                'handler_settings' => [
                    // Reference a single vocabulary.
'target_bundles' => [
                        $referenced->id(),
                    ],
                    // Enable auto-create.
'auto_create' => TRUE,
                ],
            ],
        ])
            ->save();
        
        /** @var \Drupal\Core\Entity\EntityDisplayRepositoryInterface $display_repository */
        $display_repository = \Drupal::service('entity_display.repository');
        $display_repository->getViewDisplay('node', $referencing->id())
            ->setComponent('test_field')
            ->save();
        $display_repository->getFormDisplay('node', $referencing->id(), 'default')
            ->setComponent('test_field', [
            'type' => 'entity_reference_autocomplete',
        ])
            ->save();
        $account = $this->drupalCreateUser([
            'access content',
            "create {$this->referencingType} content",
        ]);
        $this->drupalLogin($account);
    }
    
    /**
     * Tests the autocomplete input element and entity auto-creation.
     */
    public function testAutoCreate() {
        $this->drupalGet('node/add/' . $this->referencingType);
        $target = $this->assertSession()
            ->fieldExists("edit-test-field-0-target-id");
        $this->assertTrue($target->hasClass("form-autocomplete"));
        $new_title = $this->randomMachineName();
        // Assert referenced node does not exist.
        $base_query = \Drupal::entityQuery('node')->accessCheck(FALSE);
        $base_query->condition('type', $this->referencedType)
            ->condition('title', $new_title);
        $query = clone $base_query;
        $result = $query->execute();
        $this->assertEmpty($result, 'Referenced node does not exist yet.');
        $edit = [
            'title[0][value]' => $this->randomMachineName(),
            'test_field[0][target_id]' => $new_title,
        ];
        $this->drupalGet("node/add/{$this->referencingType}");
        $this->submitForm($edit, 'Save');
        // Assert referenced node was created.
        $query = clone $base_query;
        $result = $query->execute();
        $this->assertNotEmpty($result, 'Referenced node was created.');
        $referenced_nid = key($result);
        $referenced_node = Node::load($referenced_nid);
        // Assert the referenced node is associated with referencing node.
        $result = \Drupal::entityQuery('node')->accessCheck(FALSE)
            ->condition('type', $this->referencingType)
            ->execute();
        $referencing_nid = key($result);
        $referencing_node = Node::load($referencing_nid);
        $this->assertEquals($referenced_nid, $referencing_node->test_field->target_id, 'Newly created node is referenced from the referencing node.');
        // Now try to view the node and check that the referenced node is shown.
        $this->drupalGet('node/' . $referencing_node->id());
        $this->assertSession()
            ->pageTextContains($referencing_node->label());
        $this->assertSession()
            ->pageTextContains($referenced_node->label());
    }
    
    /**
     * Tests multiple target bundles.
     *
     * Tests if an entity reference field having multiple target bundles is
     * storing the auto-created entity in the right destination.
     */
    public function testMultipleTargetBundles() {
        
        /** @var \Drupal\taxonomy\Entity\Vocabulary[] $vocabularies */
        $vocabularies = [];
        for ($i = 0; $i < 2; $i++) {
            $vid = mb_strtolower($this->randomMachineName());
            $vocabularies[$i] = Vocabulary::create([
                'name' => $this->randomMachineName(),
                'vid' => $vid,
            ]);
            $vocabularies[$i]->save();
        }
        // Create a taxonomy term entity reference field that saves the auto-created
        // taxonomy terms in the second vocabulary from the two that were configured
        // as targets.
        $field_name = mb_strtolower($this->randomMachineName());
        $handler_settings = [
            'target_bundles' => [
                $vocabularies[0]->id() => $vocabularies[0]->id(),
                $vocabularies[1]->id() => $vocabularies[1]->id(),
            ],
            'auto_create' => TRUE,
            'auto_create_bundle' => $vocabularies[1]->id(),
        ];
        $this->createEntityReferenceField('node', $this->referencingType, $field_name, $this->randomString(), 'taxonomy_term', 'default', $handler_settings);
        
        /** @var \Drupal\Core\Entity\Display\EntityFormDisplayInterface $fd */
        \Drupal::service('entity_display.repository')->getFormDisplay('node', $this->referencingType)
            ->setComponent($field_name, [
            'type' => 'entity_reference_autocomplete',
        ])
            ->save();
        $term_name = $this->randomString();
        $edit = [
            $field_name . '[0][target_id]' => $term_name,
            'title[0][value]' => $this->randomString(),
        ];
        $this->drupalGet('node/add/' . $this->referencingType);
        $this->submitForm($edit, 'Save');
        $term_storage = \Drupal::entityTypeManager()->getStorage('taxonomy_term');
        
        /** @var \Drupal\taxonomy\Entity\Term $term */
        $term = $term_storage->loadByProperties([
            'name' => $term_name,
        ]);
        $term = reset($term);
        // The new term is expected to be stored in the second vocabulary.
        $this->assertEquals($vocabularies[1]->id(), $term->bundle());
        
        /** @var \Drupal\field\Entity\FieldConfig $field_config */
        $field_config = FieldConfig::loadByName('node', $this->referencingType, $field_name);
        $handler_settings = $field_config->getSetting('handler_settings');
        // Change the field setting to store the auto-created terms in the first
        // vocabulary and test again.
        $handler_settings['auto_create_bundle'] = $vocabularies[0]->id();
        $field_config->setSetting('handler_settings', $handler_settings);
        $field_config->save();
        $term_name = $this->randomString();
        $edit = [
            $field_name . '[0][target_id]' => $term_name,
            'title[0][value]' => $this->randomString(),
        ];
        $this->drupalGet('node/add/' . $this->referencingType);
        $this->submitForm($edit, 'Save');
        
        /** @var \Drupal\taxonomy\Entity\Term $term */
        $term = $term_storage->loadByProperties([
            'name' => $term_name,
        ]);
        $term = reset($term);
        // The second term is expected to be stored in the first vocabulary.
        $this->assertEquals($vocabularies[0]->id(), $term->bundle());
        // @todo Re-enable this test when WebTestBase::curlHeaderCallback() provides
        //   a way to catch and assert user-triggered errors.
        // Test the case when the field config settings are inconsistent.
        // @code
        // unset($handler_settings['auto_create_bundle']);
        // $field_config->setSetting('handler_settings', $handler_settings);
        // $field_config->save();
        //
        // $this->drupalGet('node/add/' . $this->referencingType);
        // $error_message = sprintf(
        //   "Create referenced entities if they don't already exist option is enabled but a specific destination bundle is not set. You should re-visit and fix the settings of the '%s' (%s) field.",
        //   $field_config->getLabel(),
        //   $field_config->getName()
        // );
        // $this->assertErrorLogged($error_message);
        // @endcode
    }
    
    /**
     * Tests autocreation for an entity that has no bundles.
     */
    public function testNoBundles() {
        $account = $this->drupalCreateUser([
            'access content',
            "create {$this->referencingType} content",
            'administer entity_test content',
        ]);
        $this->drupalLogin($account);
        $field_name = mb_strtolower($this->randomMachineName());
        $handler_settings = [
            'auto_create' => TRUE,
        ];
        $this->createEntityReferenceField('node', $this->referencingType, $field_name, $this->randomString(), 'entity_test_no_bundle_with_label', 'default', $handler_settings);
        \Drupal::service('entity_display.repository')->getFormDisplay('node', $this->referencingType)
            ->setComponent($field_name, [
            'type' => 'entity_reference_autocomplete',
        ])
            ->save();
        $node_title = $this->randomMachineName();
        $name = $this->randomMachineName();
        $edit = [
            $field_name . '[0][target_id]' => $name,
            'title[0][value]' => $node_title,
        ];
        $this->drupalGet('node/add/' . $this->referencingType);
        $this->submitForm($edit, 'Save');
        // Assert referenced entity was created.
        $result = \Drupal::entityQuery('entity_test_no_bundle_with_label')->accessCheck(FALSE)
            ->condition('name', $name)
            ->execute();
        $this->assertNotEmpty($result, 'Referenced entity was created.');
        $referenced_id = key($result);
        // Assert the referenced entity is associated with referencing node.
        $result = \Drupal::entityQuery('node')->accessCheck(FALSE)
            ->condition('type', $this->referencingType)
            ->execute();
        $this->assertCount(1, $result);
        $referencing_nid = key($result);
        $referencing_node = Node::load($referencing_nid);
        $this->assertEquals($referenced_id, $referencing_node->{$field_name}->target_id, 'Newly created node is referenced from the referencing entity.');
    }

}