class NestedFormTest

class NestedFormTest extends FieldTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'field_test',
        'entity_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * @var array
     */
    protected array $fieldStorageSingle;
    
    /**
     * @var array
     */
    protected array $fieldStorageUnlimited;
    
    /**
     * @var array
     */
    protected array $field;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $web_user = $this->drupalCreateUser([
            'view test entity',
            'administer entity_test content',
        ]);
        $this->drupalLogin($web_user);
        $this->fieldStorageSingle = [
            'field_name' => 'field_single',
            'entity_type' => 'entity_test',
            'type' => 'test_field',
        ];
        $this->fieldStorageUnlimited = [
            'field_name' => 'field_unlimited',
            'entity_type' => 'entity_test',
            'type' => 'test_field',
            'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
        ];
        $this->field = [
            'entity_type' => 'entity_test',
            'bundle' => 'entity_test',
            'label' => $this->randomMachineName() . '_label',
            'description' => '[site:name]_description',
            'weight' => mt_rand(0, 127),
            'settings' => [
                'test_field_setting' => $this->randomMachineName(),
            ],
        ];
    }
    
    /**
     * Tests Field API form integration within a subform.
     */
    public function testNestedFieldForm() : void {
        
        /** @var \Drupal\Core\Entity\EntityDisplayRepositoryInterface $display_repository */
        $display_repository = \Drupal::service('entity_display.repository');
        // Add two fields on the 'entity_test'
        FieldStorageConfig::create($this->fieldStorageSingle)
            ->save();
        FieldStorageConfig::create($this->fieldStorageUnlimited)
            ->save();
        $this->field['field_name'] = 'field_single';
        $this->field['label'] = 'Single field';
        FieldConfig::create($this->field)
            ->save();
        $display_repository->getFormDisplay($this->field['entity_type'], $this->field['bundle'])
            ->setComponent($this->field['field_name'])
            ->save();
        $this->field['field_name'] = 'field_unlimited';
        $this->field['label'] = 'Unlimited field';
        FieldConfig::create($this->field)
            ->save();
        $display_repository->getFormDisplay($this->field['entity_type'], $this->field['bundle'])
            ->setComponent($this->field['field_name'])
            ->save();
        // Create two entities.
        $entity_type = 'entity_test';
        $storage = $this->container
            ->get('entity_type.manager')
            ->getStorage($entity_type);
        $entity_1 = $storage->create([
            'id' => 1,
        ]);
        $entity_1->enforceIsNew();
        $entity_1->field_single->value = 1;
        $entity_1->field_unlimited->value = 2;
        $entity_1->save();
        $entity_2 = $storage->create([
            'id' => 2,
        ]);
        $entity_2->enforceIsNew();
        $entity_2->field_single->value = 10;
        $entity_2->field_unlimited->value = 11;
        $entity_2->save();
        // Display the 'combined form'.
        $this->drupalGet('test-entity/nested/1/2');
        $this->assertSession()
            ->fieldValueEquals('field_single[0][value]', 1);
        $this->assertSession()
            ->fieldValueEquals('field_unlimited[0][value]', 2);
        $this->assertSession()
            ->fieldValueEquals('entity_2[field_single][0][value]', 10);
        $this->assertSession()
            ->fieldValueEquals('entity_2[field_unlimited][0][value]', 11);
        // Submit the form and check that the entities are updated accordingly.
        $edit = [
            'field_single[0][value]' => 1,
            'field_unlimited[0][value]' => 2,
            'field_unlimited[1][value]' => 3,
            'entity_2[field_single][0][value]' => 11,
            'entity_2[field_unlimited][0][value]' => 12,
            'entity_2[field_unlimited][1][value]' => 13,
        ];
        $this->submitForm($edit, 'Save');
        $entity_1 = $storage->load(1);
        $entity_2 = $storage->load(2);
        $this->assertFieldValues($entity_1, 'field_single', [
            1,
        ]);
        $this->assertFieldValues($entity_1, 'field_unlimited', [
            2,
            3,
        ]);
        $this->assertFieldValues($entity_2, 'field_single', [
            11,
        ]);
        $this->assertFieldValues($entity_2, 'field_unlimited', [
            12,
            13,
        ]);
        // Submit invalid values and check that errors are reported on the
        // correct widgets.
        $edit = [
            'field_unlimited[1][value]' => -1,
        ];
        $this->drupalGet('test-entity/nested/1/2');
        $this->submitForm($edit, 'Save');
        $this->assertSession()
            ->pageTextContains("Unlimited field does not accept the value -1.");
        // Entity 1: check that the error was flagged on the correct element.
        $error_field = $this->assertSession()
            ->fieldExists('edit-field-unlimited-1-value');
        $this->assertTrue($error_field->hasClass('error'));
        $edit = [
            'entity_2[field_unlimited][1][value]' => -1,
        ];
        $this->drupalGet('test-entity/nested/1/2');
        $this->submitForm($edit, 'Save');
        $this->assertSession()
            ->pageTextContains("Unlimited field does not accept the value -1.");
        // Entity 2: check that the error was flagged on the correct element.
        $error_field = $this->assertSession()
            ->fieldExists('edit-entity-2-field-unlimited-1-value');
        $this->assertTrue($error_field->hasClass('error'));
        // Test that reordering works on both entities.
        $edit = [
            'field_unlimited[0][_weight]' => 0,
            'field_unlimited[1][_weight]' => -1,
            'entity_2[field_unlimited][0][_weight]' => 0,
            'entity_2[field_unlimited][1][_weight]' => -1,
        ];
        $this->drupalGet('test-entity/nested/1/2');
        $this->submitForm($edit, 'Save');
        $this->assertFieldValues($entity_1, 'field_unlimited', [
            3,
            2,
        ]);
        $this->assertFieldValues($entity_2, 'field_unlimited', [
            13,
            12,
        ]);
        // Test the 'add more' buttons.
        // 'Add more' button in the first entity:
        $this->drupalGet('test-entity/nested/1/2');
        $this->submitForm([], 'field_unlimited_add_more');
        $this->assertSession()
            ->fieldValueEquals('field_unlimited[0][value]', 3);
        $this->assertSession()
            ->fieldValueEquals('field_unlimited[1][value]', 2);
        $this->assertSession()
            ->fieldValueEquals('field_unlimited[2][value]', '');
        $this->assertSession()
            ->fieldValueEquals('field_unlimited[3][value]', '');
        // 'Add more' button in the first entity (changing field values):
        $edit = [
            'entity_2[field_unlimited][0][value]' => 13,
            'entity_2[field_unlimited][1][value]' => 14,
            'entity_2[field_unlimited][2][value]' => 15,
        ];
        $this->submitForm($edit, 'entity_2_field_unlimited_add_more');
        $this->assertSession()
            ->fieldValueEquals('entity_2[field_unlimited][0][value]', 13);
        $this->assertSession()
            ->fieldValueEquals('entity_2[field_unlimited][1][value]', 14);
        $this->assertSession()
            ->fieldValueEquals('entity_2[field_unlimited][2][value]', 15);
        $this->assertSession()
            ->fieldValueEquals('entity_2[field_unlimited][3][value]', '');
        // Save the form and check values are saved correctly.
        $this->submitForm([], 'Save');
        $this->assertFieldValues($entity_1, 'field_unlimited', [
            3,
            2,
        ]);
        $this->assertFieldValues($entity_2, 'field_unlimited', [
            13,
            14,
            15,
        ]);
    }
    
    /**
     * Tests entity level validation within subforms.
     */
    public function testNestedEntityFormEntityLevelValidation() : void {
        // Create two entities.
        $storage = $this->container
            ->get('entity_type.manager')
            ->getStorage('entity_test_constraints');
        $entity_1 = $storage->create();
        $entity_1->save();
        $entity_2 = $storage->create();
        $entity_2->save();
        $page = $this->getSession()
            ->getPage();
        $assert_session = $this->assertSession();
        // Display the 'combined form'.
        $this->drupalGet("test-entity-constraints/nested/{$entity_1->id()}/{$entity_2->id()}");
        $assert_session->hiddenFieldValueEquals('entity_2[changed]', (string) \Drupal::time()->getRequestTime());
        // Submit the form and check that the entities are updated accordingly.
        $assert_session->hiddenFieldExists('entity_2[changed]')
            ->setValue(\Drupal::time()->getRequestTime() - 86400);
        $page->pressButton('Save');
        $elements = $this->cssSelect('.entity-2.error');
        $this->assertCount(1, $elements, 'The whole nested entity form has been correctly flagged with an error class.');
    }

}