class OptionsFieldUIAllowedValuesTest

class OptionsFieldUIAllowedValuesTest extends WebDriverTestBase {
    use FieldUiJSTestTrait;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'node',
        'options',
        'field_ui',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Machine name of the created content type.
     *
     * @var string
     */
    protected $type;
    
    /**
     * Name of the option field.
     *
     * @var string
     */
    protected $fieldName;
    
    /**
     * Admin path to manage field storage settings.
     *
     * @var string
     */
    protected $adminPath;
    
    /**
     * Node form path for created content type.
     *
     * @var string
     */
    protected $nodeFormPath;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Create test user.
        $admin_user = $this->drupalCreateUser([
            'bypass node access',
            'administer node fields',
            'administer node display',
        ]);
        $this->drupalLogin($admin_user);
        $type = $this->drupalCreateContentType([
            'type' => 'plan',
        ]);
        $this->type = $type->id();
        $this->nodeFormPath = 'node/add/' . $this->type;
    }
    
    /**
     * Tests option types allowed values.
     *
     * @dataProvider providerTestOptionsAllowedValues
     */
    public function testOptionsAllowedValues($option_type, $options, $is_string_option, string $add_row_method) : void {
        $assert = $this->assertSession();
        $this->fieldName = 'field_options_text';
        $this->createOptionsField($option_type);
        $page = $this->getSession()
            ->getPage();
        $this->drupalGet($this->adminPath);
        $i = 0;
        $expected_rows = 1;
        $this->assertAllowValuesRowCount(1);
        foreach ($options as $option_key => $option_label) {
            $enter_element_name = $label_element_name = "field_storage[subform][settings][allowed_values][table][{$i}][item][label]";
            $page->fillField($label_element_name, $option_label);
            $this->assertSession()
                ->assertWaitOnAjaxRequest();
            $key_element_name = "field_storage[subform][settings][allowed_values][table][{$i}][item][key]";
            // Add keys if not string option list.
            if (!$is_string_option) {
                $this->pressEnterOnElement("[name=\"{$label_element_name}\"]");
                // Assert that pressing enter on label field does not create the new
                // row if the key field is visible.
                $this->assertAllowValuesRowCount($expected_rows);
                $enter_element_name = $key_element_name;
                $this->assertHasFocusByAttribute('name', $key_element_name);
                $page->fillField($key_element_name, $option_key);
                $this->assertSession()
                    ->assertWaitOnAjaxRequest();
            }
            else {
                $this->assertFalse($assert->fieldExists($key_element_name)
                    ->isVisible());
            }
            switch ($add_row_method) {
                case 'Press button':
                    $page->pressButton('Add another item');
                    break;
                case 'Enter button':
                    $button = $assert->buttonExists('Add another item');
                    $this->pressEnterOnElement('[data-drupal-selector="' . $button->getAttribute('data-drupal-selector') . '"]');
                    break;
                case 'Enter element':
                    // If testing using the "enter" key while focused on element there a
                    // few different scenarios to test.
                    switch ($i) {
                        case 0:
                            // For string options the machine name input can be exposed which
                            // will mean the label input will no longer create the next row.
                            if ($is_string_option) {
                                $this->exposeOptionMachineName($expected_rows);
                                $this->pressEnterOnElement("[name=\"{$enter_element_name}\"]");
                                $this->assertHasFocusByAttribute('name', $key_element_name);
                                // Ensure that pressing enter while focused on the label input
                                // did not create a new row if the machine name field is
                                // visible.
                                $this->assertAllowValuesRowCount($expected_rows);
                                $enter_element_name = $key_element_name;
                            }
                            break;
                    }
                    $this->pressEnterOnElement("[name=\"{$enter_element_name}\"]");
                    break;
                default:
                    throw new \UnexpectedValueException("Unknown method {$add_row_method}");
            }
            $i++;
            $expected_rows++;
            $this->assertSession()
                ->waitForElementVisible('css', "[name='field_storage[subform][settings][allowed_values][table][{$i}][item][label]']");
            $this->assertHasFocusByAttribute('name', "field_storage[subform][settings][allowed_values][table][{$i}][item][label]");
            $this->assertAllowValuesRowCount($expected_rows);
            if ($is_string_option) {
                // Expose the key input for string options for the previous row to test
                // shifting focus from the label to key inputs on the previous row by
                // pressing enter.
                $this->exposeOptionMachineName($expected_rows - 1);
            }
            // Test that pressing enter on the label input on previous row will shift
            // focus to key input of that row.
            $this->pressEnterOnElement("[name=\"{$label_element_name}\"]");
            $this->assertHasFocusByAttribute('name', $key_element_name);
            $this->assertAllowValuesRowCount($expected_rows);
        }
        $page->pressButton('Save');
        // Test the order of the option list on node form.
        $this->drupalGet($this->nodeFormPath);
        $this->assertNodeFormOrder([
            '- None -',
            'First',
            'Second',
            'Third',
        ]);
        // Test the order of the option list on admin path.
        $this->drupalGet($this->adminPath);
        $this->assertOrder([
            'First',
            'Second',
            'Third',
            '',
        ], $is_string_option);
        $drag_handle = $page->find('css', '[data-drupal-selector="edit-field-storage-subform-settings-allowed-values-table-0"] .tabledrag-handle');
        $target = $page->find('css', '[data-drupal-selector="edit-field-storage-subform-settings-allowed-values-table-2"]');
        // Change the order the items appear.
        $drag_handle->dragTo($target);
        $this->assertOrder([
            'Second',
            'Third',
            'First',
            '',
        ], $is_string_option);
        $page->pressButton('Save');
        $this->drupalGet($this->nodeFormPath);
        $this->assertNodeFormOrder([
            '- None -',
            'Second',
            'Third',
            'First',
        ]);
        $this->drupalGet($this->adminPath);
        // Confirm the change in order was saved.
        $this->assertOrder([
            'Second',
            'Third',
            'First',
            '',
        ], $is_string_option);
        // Delete an item.
        $page->pressButton('remove_row_button__1');
        $this->assertSession()
            ->assertWaitOnAjaxRequest();
        $this->assertOrder([
            'Second',
            'First',
            '',
        ], $is_string_option);
        $page->pressButton('Save');
        $this->drupalGet($this->nodeFormPath);
        $this->assertNodeFormOrder([
            '- None -',
            'Second',
            'First',
        ]);
        $this->drupalGet($this->adminPath);
        // Confirm the item removal was saved.
        $this->assertOrder([
            'Second',
            'First',
            '',
        ], $is_string_option);
    }
    
    /**
     * Asserts the order of provided option list on admin path.
     *
     * @param array $expected
     *   Expected order.
     * @param bool $is_string_option
     *   Whether the request is for string option list.
     */
    protected function assertOrder($expected, $is_string_option) {
        $page = $this->getSession()
            ->getPage();
        if ($is_string_option) {
            $inputs = $page->findAll('css', '.draggable .form-text.machine-name-source');
        }
        else {
            $inputs = $page->findAll('css', '.draggable .form-text');
        }
        foreach ($expected as $step => $expected_input_value) {
            $value = $inputs[$step]->getValue();
            $this->assertSame($expected_input_value, $value, "Item {$step} should be {$expected_input_value}, but got {$value}");
        }
    }
    
    /**
     * Asserts the order of provided option list on node form.
     *
     * @param array $expected
     *   Expected order.
     */
    protected function assertNodeFormOrder($expected) {
        $elements = $this->assertSession()
            ->selectExists('field_options_text')
            ->findAll('css', 'option');
        $elements = array_map(function ($element) {
            return $element->getText();
        }, $elements);
        $this->assertSame($expected, $elements);
    }
    
    /**
     * Helper function to create list field of a given type.
     *
     * @param string $type
     *   One of 'list_integer', 'list_float' or 'list_string'.
     */
    protected function createOptionsField($type) {
        // Create a field.
        FieldStorageConfig::create([
            'field_name' => $this->fieldName,
            'entity_type' => 'node',
            'type' => $type,
        ])
            ->save();
        FieldConfig::create([
            'field_name' => $this->fieldName,
            'entity_type' => 'node',
            'bundle' => $this->type,
        ])
            ->save();
        \Drupal::service('entity_display.repository')->getFormDisplay('node', $this->type)
            ->setComponent($this->fieldName)
            ->save();
        $this->adminPath = 'admin/structure/types/manage/' . $this->type . '/fields/node.' . $this->type . '.' . $this->fieldName;
    }
    
    /**
     * Presses "Enter" on the specified element.
     *
     * @param string $selector
     *   Current element having focus.
     */
    private function pressEnterOnElement(string $selector) : void {
        $javascript = <<<JS
      const element = document.querySelector('{<span class="php-variable">$selector</span>}');
      const event = new KeyboardEvent('keypress', { key: 'Enter', keyCode: 13, bubbles: true });
      element.dispatchEvent(event);
JS;
        $this->getSession()
            ->executeScript($javascript);
    }
    
    /**
     * Data provider for testOptionsAllowedValues().
     *
     * @return array
     *   Array of arrays with the following elements:
     *   - Option type.
     *   - Array of option type values.
     *   - Whether option type is string type or not.
     *   - The method which should be used to add another row to the table. The
     *     possible values are 'Press button', 'Enter button' or 'Enter element'.
     */
    public static function providerTestOptionsAllowedValues() {
        $type_cases = [
            'List integer' => [
                'list_integer',
                [
                    1 => 'First',
                    2 => 'Second',
                    3 => 'Third',
                ],
                FALSE,
            ],
            'List float' => [
                'list_float',
                [
                    '0.1' => 'First',
                    '0.2' => 'Second',
                    '0.3' => 'Third',
                ],
                FALSE,
            ],
            'List string' => [
                'list_string',
                [
                    'first' => 'First',
                    'second' => 'Second',
                    'third' => 'Third',
                ],
                TRUE,
            ],
        ];
        // Test adding options for each option field type using several possible
        // methods that could be used for navigating the options list:
        // - Press button: add a new item by pressing the 'Add another item'
        // button using mouse.
        // - Enter button: add a new item by pressing the 'Add another item'
        // button using enter key on the keyboard.
        // - Enter element: add a new item by pressing enter on the last text
        // field inside the table.
        $test_cases = [];
        foreach ($type_cases as $key => $type_case) {
            foreach ([
                'Press button',
                'Enter button',
                'Enter element',
            ] as $add_more_method) {
                $test_cases["{$key}: {$add_more_method}"] = array_merge($type_case, [
                    $add_more_method,
                ]);
            }
        }
        return $test_cases;
    }
    
    /**
     * Assert the count of the allowed values rows.
     *
     * @param int $expected_count
     *   The expected row count.
     */
    private function assertAllowValuesRowCount(int $expected_count) : void {
        $this->assertCount($expected_count, $this->getSession()
            ->getPage()
            ->findAll('css', '#allowed-values-order tr.draggable'));
    }
    
    /**
     * Exposes the machine name input for a row.
     *
     * @param int $row
     *   The row number.
     */
    private function exposeOptionMachineName(int $row) : void {
        $index = $row - 1;
        $rows = $this->getSession()
            ->getPage()
            ->findAll('css', '#allowed-values-order tr.draggable');
        $this->assertSession()
            ->buttonExists('Edit', $rows[$index])
            ->click();
        $this->assertSession()
            ->waitForElementVisible('css', "[name='field_storage[subform][settings][allowed_values][table][{$index}][item][key]']");
    }
    
    /**
     * Asserts an element specified by an attribute value has focus.
     *
     * @param string $name
     *   The attribute name.
     * @param string $value
     *   The attribute value.
     *
     * @todo Replace with assertHasFocus() in https://drupal.org/i/3041768.
     */
    private function assertHasFocusByAttribute(string $name, string $value) : void {
        $active_element = $this->getSession()
            ->evaluateScript('document.activeElement');
        $this->assertSame($value, $active_element->attribute($name));
    }

}