class ExposedFormTest

class ExposedFormTest extends ViewTestBase {
    use AssertPageCacheContextsAndTagsTrait;
    
    /**
     * Views used by this test.
     *
     * @var array
     */
    public static $testViews = [
        'test_exposed_form_buttons',
        'test_exposed_block',
        'test_exposed_form_sort_items_per_page',
        'test_exposed_form_pager',
        'test_remember_selected',
    ];
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'node',
        'views_ui',
        'block',
        'entity_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'starterkit_theme';
    
    /**
     * Nodes to test.
     *
     * @var \Drupal\node\NodeInterface[]
     */
    protected $nodes = [];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp($import_test_views = TRUE, $modules = [
        'views_test_config',
    ]) : void {
        parent::setUp($import_test_views, $modules);
        $this->enableViewsTestModule();
        $this->drupalCreateContentType([
            'type' => 'article',
        ]);
        $this->drupalCreateContentType([
            'type' => 'page',
        ]);
        $this->nodes = [];
        // Create some random nodes.
        for ($i = 0; $i < 5; $i++) {
            $this->nodes[] = $this->drupalCreateNode([
                'type' => 'article',
            ]);
            $this->nodes[] = $this->drupalCreateNode([
                'type' => 'page',
            ]);
        }
    }
    
    /**
     * Tests the submit button.
     */
    public function testSubmitButton() {
        // Test the submit button value defaults to 'Apply'.
        $this->drupalGet('test_exposed_form_buttons');
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->helperButtonHasLabel('edit-submit-test-exposed-form-buttons', 'Apply');
        // Rename the label of the submit button.
        $view = Views::getView('test_exposed_form_buttons');
        $view->setDisplay();
        $exposed_form = $view->display_handler
            ->getOption('exposed_form');
        $exposed_form['options']['submit_button'] = $expected_label = $this->randomMachineName();
        $view->display_handler
            ->setOption('exposed_form', $exposed_form);
        $view->save();
        // Make sure the submit button label changed.
        $this->drupalGet('test_exposed_form_buttons');
        $this->helperButtonHasLabel('edit-submit-test-exposed-form-buttons', $expected_label);
        // Make sure an empty label uses the default 'Apply' button value too.
        $view = Views::getView('test_exposed_form_buttons');
        $view->setDisplay();
        $exposed_form = $view->display_handler
            ->getOption('exposed_form');
        $exposed_form['options']['submit_button'] = '';
        $view->display_handler
            ->setOption('exposed_form', $exposed_form);
        $view->save();
        // Make sure the submit button label shows 'Apply'.
        $this->drupalGet('test_exposed_form_buttons');
        $this->helperButtonHasLabel('edit-submit-test-exposed-form-buttons', 'Apply');
    }
    
    /**
     * Tests the exposed form with a non-standard identifier.
     */
    public function testExposedIdentifier() {
        // Alter the identifier of the filter to a random string.
        $view = Views::getView('test_exposed_form_buttons');
        $view->setDisplay();
        $identifier = 'new_identifier';
        $view->displayHandlers
            ->get('default')
            ->overrideOption('filters', [
            'type' => [
                'exposed' => TRUE,
                'field' => 'type',
                'id' => 'type',
                'table' => 'node_field_data',
                'plugin_id' => 'in_operator',
                'entity_type' => 'node',
                'entity_field' => 'type',
                'expose' => [
                    'identifier' => $identifier,
                    'label' => 'Content: Type',
                    'operator_id' => 'type_op',
                    'reduce' => FALSE,
                    'description' => 'Exposed overridden description',
                ],
            ],
        ]);
        $view->save();
        $this->drupalGet('test_exposed_form_buttons', [
            'query' => [
                $identifier => 'article',
            ],
        ]);
        $this->assertSession()
            ->fieldValueEquals(Html::getId('edit-' . $identifier), 'article');
        // Alter the identifier of the filter to a random string containing
        // restricted characters.
        $view = Views::getView('test_exposed_form_buttons');
        $view->setDisplay();
        $identifier = 'bad identifier';
        $view->displayHandlers
            ->get('default')
            ->overrideOption('filters', [
            'type' => [
                'exposed' => TRUE,
                'field' => 'type',
                'id' => 'type',
                'table' => 'node_field_data',
                'plugin_id' => 'in_operator',
                'entity_type' => 'node',
                'entity_field' => 'type',
                'expose' => [
                    'identifier' => $identifier,
                    'label' => 'Content: Type',
                    'operator_id' => 'type_op',
                    'reduce' => FALSE,
                    'description' => 'Exposed overridden description',
                ],
            ],
        ]);
        $this->executeView($view);
        $errors = $view->validate();
        $expected = [
            'default' => [
                'This identifier has illegal characters.',
            ],
            'page_1' => [
                'This identifier has illegal characters.',
            ],
        ];
        $this->assertEquals($expected, $errors);
    }
    
    /**
     * Tests whether the reset button works on an exposed form.
     */
    public function testResetButton() {
        // Test the button is hidden when there is no exposed input.
        $this->drupalGet('test_exposed_form_buttons');
        $this->assertSession()
            ->fieldNotExists('edit-reset');
        $this->drupalGet('test_exposed_form_buttons', [
            'query' => [
                'type' => 'article',
            ],
        ]);
        // Test that the type has been set.
        $this->assertSession()
            ->fieldValueEquals('edit-type', 'article');
        // Test the reset works.
        $this->drupalGet('test_exposed_form_buttons', [
            'query' => [
                'op' => 'Reset',
            ],
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        // Test the type has been reset.
        $this->assertSession()
            ->fieldValueEquals('edit-type', 'All');
        // Test the button is hidden after reset.
        $this->assertSession()
            ->fieldNotExists('edit-reset');
        // Test the reset works with type set.
        $this->drupalGet('test_exposed_form_buttons', [
            'query' => [
                'type' => 'article',
                'op' => 'Reset',
            ],
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->fieldValueEquals('edit-type', 'All');
        // Test the button is hidden after reset.
        $this->assertSession()
            ->fieldNotExists('edit-reset');
        // Rename the label of the reset button.
        $view = Views::getView('test_exposed_form_buttons');
        $view->setDisplay();
        $exposed_form = $view->display_handler
            ->getOption('exposed_form');
        $exposed_form['options']['reset_button_label'] = $expected_label = $this->randomMachineName();
        $exposed_form['options']['reset_button'] = TRUE;
        $view->display_handler
            ->setOption('exposed_form', $exposed_form);
        $view->save();
        // Look whether the reset button label changed.
        $this->drupalGet('test_exposed_form_buttons', [
            'query' => [
                'type' => 'article',
            ],
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->helperButtonHasLabel('edit-reset', $expected_label);
    }
    
    /**
     * Tests the exposed block functionality.
     *
     * @dataProvider providerTestExposedBlock
     */
    public function testExposedBlock($display) {
        $view = Views::getView('test_exposed_block');
        $view->setDisplay($display);
        $block = $this->drupalPlaceBlock('views_exposed_filter_block:test_exposed_block-' . $display);
        // Set label to display on the exposed filter form block.
        $block->getPlugin()
            ->setConfigurationValue('label_display', TRUE);
        $block->save();
        // Assert that the only two occurrences of `$view->getTitle()` are the title
        // and h2 tags.
        $this->drupalGet('test_exposed_block');
        $this->assertSession()
            ->elementContains('css', 'title', $view->getTitle());
        $this->assertSession()
            ->elementExists('xpath', '//h2[text()="' . $view->getTitle() . '"]');
        $this->assertSession()
            ->pageTextMatchesCount(2, '/' . $view->getTitle() . '/');
        // Set a custom label on the exposed filter form block.
        $block->getPlugin()
            ->setConfigurationValue('views_label', '<strong>Custom</strong> title<script>alert("hacked!");</script>');
        $block->save();
        // Test that the custom block label is found.
        $this->drupalGet('test_exposed_block');
        $this->assertSession()
            ->responseContains('<strong>Custom</strong> titlealert("hacked!");');
        // Set label to hidden on the exposed filter form block.
        $block->getPlugin()
            ->setConfigurationValue('label_display', FALSE);
        $block->save();
        // Test that the label is removed.
        // Assert that the only occurrence of `$view->getTitle()` is the title tag
        // now that label has been removed.
        $this->drupalGet('test_exposed_block');
        $this->assertSession()
            ->responseNotContains('<strong>Custom</strong> titlealert("hacked!");');
        $this->assertSession()
            ->elementContains('css', 'title', $view->getTitle());
        $this->assertSession()
            ->pageTextMatchesCount(1, '/' . $view->getTitle() . '/');
        // Test there is an exposed form in a block.
        $this->assertSession()
            ->elementsCount('xpath', '//div[@id="' . Html::getUniqueId('block-' . $block->id()) . '"]/form/@id', 1);
        // Test there is not an exposed form in the view page content area.
        $xpath = $this->assertSession()
            ->buildXPathQuery('//div[@class="view-content"]/form/@id', [
            ':id' => Html::getUniqueId('block-' . $block->id()),
        ]);
        $this->assertSession()
            ->elementNotExists('xpath', $xpath);
        // Test there is only one views exposed form on the page.
        $xpath = '//form[@id="' . $this->getExpectedExposedFormId($view) . '"]';
        $this->assertSession()
            ->elementsCount('xpath', $xpath, 1);
        $element = $this->assertSession()
            ->elementExists('xpath', $xpath);
        // Test that the correct option is selected after form submission.
        $this->assertCacheContext('url');
        $this->assertTrue($this->assertSession()
            ->optionExists('Content: Type', 'All')
            ->isSelected());
        $arguments = [
            'All' => [
                'article',
                'page',
            ],
            'article' => [
                'article',
            ],
            'page' => [
                'page',
            ],
        ];
        foreach ($arguments as $argument => $bundles) {
            $element->find('css', 'select')
                ->selectOption($argument);
            $element->findButton('Apply')
                ->click();
            $this->assertCacheContext('url');
            $this->assertTrue($this->assertSession()
                ->optionExists('Content: Type', $argument)
                ->isSelected());
            $this->assertNodesExist($bundles);
        }
        $element->findButton('Reset')
            ->click();
        $this->assertNodesExist($arguments['All']);
    }
    
    /**
     * Data provider for testing different types of displays.
     *
     * @return array
     *   Array of display names to test.
     */
    public function providerTestExposedBlock() {
        return [
            'page_display' => [
                'page_1',
            ],
            'block_display' => [
                'block_1',
            ],
        ];
    }
    
    /**
     * Tests the input required exposed form type.
     */
    public function testInputRequired() {
        $view = View::load('test_exposed_form_buttons');
        $display =& $view->getDisplay('default');
        $display['display_options']['exposed_form']['type'] = 'input_required';
        $view->save();
        $this->drupalGet('test_exposed_form_buttons');
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->helperButtonHasLabel('edit-submit-test-exposed-form-buttons', 'Apply');
        // Ensure that no results are displayed by default when no input is
        // provided.
        $this->assertSession()
            ->elementNotExists('xpath', "//div[contains(@class, 'views-row')]");
        $this->drupalGet('test_exposed_form_buttons', [
            'query' => [
                'type' => 'article',
            ],
        ]);
        // Ensure that results are displayed by default when input is provided.
        $this->assertSession()
            ->elementsCount('xpath', "//div[contains(@class, 'views-row')]", 5);
    }
    
    /**
     * Tests the "on demand text" for the input required exposed form type.
     */
    public function testTextInputRequired() {
        $view = Views::getView('test_exposed_form_buttons');
        $display =& $view->storage
            ->getDisplay('default');
        $display['display_options']['exposed_form']['type'] = 'input_required';
        // Set up the "on demand text".
        // @see https://www.drupal.org/node/535868
        $on_demand_text = 'Select any filter and click Apply to see results.';
        $display['display_options']['exposed_form']['options']['text_input_required'] = $on_demand_text;
        $display['display_options']['exposed_form']['options']['text_input_required_format'] = filter_default_format();
        $view->save();
        // Ensure that the "on demand text" is displayed when no exposed filters are
        // applied.
        $this->drupalGet('test_exposed_form_buttons');
        $this->assertSession()
            ->pageTextContains('Select any filter and click Apply to see results.');
        // Ensure that the "on demand text" is not displayed when an exposed filter
        // is applied.
        $this->drupalGet('test_exposed_form_buttons', [
            'query' => [
                'type' => 'article',
            ],
        ]);
        $this->assertSession()
            ->pageTextNotContains($on_demand_text);
    }
    
    /**
     * Tests exposed forms with exposed sort and items per page.
     */
    public function testExposedSortAndItemsPerPage() {
        for ($i = 0; $i < 50; $i++) {
            $entity = EntityTest::create([]);
            $entity->save();
        }
        $contexts = [
            'languages:language_interface',
            'entity_test_view_grants',
            'theme',
            'url.query_args',
            'languages:language_content',
        ];
        $this->drupalGet('test_exposed_form_sort_items_per_page');
        $this->assertCacheContexts($contexts);
        $this->assertIds(range(1, 10, 1));
        $this->drupalGet('test_exposed_form_sort_items_per_page', [
            'query' => [
                'sort_order' => 'DESC',
            ],
        ]);
        $this->assertCacheContexts($contexts);
        $this->assertIds(range(50, 41, 1));
        $this->drupalGet('test_exposed_form_sort_items_per_page', [
            'query' => [
                'sort_order' => 'DESC',
                'items_per_page' => 25,
            ],
        ]);
        $this->assertCacheContexts($contexts);
        $this->assertIds(range(50, 26, 1));
        $this->drupalGet('test_exposed_form_sort_items_per_page', [
            'query' => [
                'sort_order' => 'DESC',
                'items_per_page' => 25,
                'offset' => 10,
            ],
        ]);
        $this->assertCacheContexts($contexts);
        $this->assertIds(range(40, 16, 1));
        $view = Views::getView('test_exposed_form_sort_items_per_page');
        $view->setDisplay();
        $sorts = $view->display_handler
            ->getOption('sorts');
        // Change the label to something with special characters.
        $sorts['id']['expose']['label'] = $expected_label = "<script>alert('unsafe&dangerous');</script>";
        // Use a custom sort field identifier.
        $sorts['id']['expose']['field_identifier'] = $field_identifier = $this->randomMachineName() . '-_.~';
        $view->display_handler
            ->setOption('sorts', $sorts);
        $view->save();
        // Test label escaping.
        $this->drupalGet('test_exposed_form_sort_items_per_page');
        $options = $this->assertSession()
            ->selectExists('edit-sort-by')
            ->findAll('css', 'option');
        $this->assertCount(1, $options);
        // Check option existence by option label.
        $this->assertSession()
            ->optionExists('Sort by', $expected_label);
        // Check option existence by option value.
        $this->assertSession()
            ->optionExists('Sort by', $field_identifier);
        $escape_1 = Html::escape($expected_label);
        $escape_2 = Html::escape($escape_1);
        // Make sure we see the single-escaped string in the raw output.
        $this->assertSession()
            ->responseContains($escape_1);
        // But no double-escaped string.
        $this->assertSession()
            ->responseNotContains($escape_2);
        // And not the raw label, either.
        $this->assertSession()
            ->responseNotContains($expected_label);
        // Check that the custom field identifier is used in the URL query string.
        $this->submitForm([
            'sort_order' => 'DESC',
        ], 'Apply');
        $this->assertCacheContexts($contexts);
        $this->assertIds(range(50, 41));
        $url = $this->getSession()
            ->getCurrentUrl();
        $this->assertStringContainsString('sort_by=' . urlencode($field_identifier), $url);
    }
    
    /**
     * Checks whether the specified ids are the ones displayed in the view output.
     *
     * @param int[] $ids
     *   The ids to check.
     *
     * @internal
     */
    protected function assertIds(array $ids) : void {
        $elements = $this->cssSelect('div.view-test-exposed-form-sort-items-per-page div.views-row span.field-content');
        $actual_ids = [];
        foreach ($elements as $element) {
            $actual_ids[] = (int) $element->getText();
        }
        $this->assertSame($ids, $actual_ids);
    }
    
    /**
     * Returns a views exposed form ID.
     *
     * @param \Drupal\views\ViewExecutable $view
     *   The view to create an ID for.
     *
     * @return string
     *   The form ID.
     */
    protected function getExpectedExposedFormId(ViewExecutable $view) {
        return Html::cleanCssIdentifier('views-exposed-form-' . $view->storage
            ->id() . '-' . $view->current_display);
    }
    
    /**
     * Tests a view which is rendered after a form with a validation error.
     */
    public function testFormErrorWithExposedForm() {
        $this->drupalGet('views_test_data_error_form_page');
        $this->assertSession()
            ->statusCodeEquals(200);
        $form = $this->cssSelect('form.views-exposed-form');
        $this->assertNotEmpty($form, 'The exposed form element was found.');
        // Ensure the exposed form is rendered before submitting the normal form.
        $this->assertSession()
            ->responseContains("Apply");
        $this->assertSession()
            ->responseContains('<div class="views-row">');
        $this->submitForm([], 'Submit');
        $this->assertSession()
            ->statusCodeEquals(200);
        $form = $this->cssSelect('form.views-exposed-form');
        $this->assertNotEmpty($form, 'The exposed form element was found.');
        // Ensure the exposed form is rendered after submitting the normal form.
        $this->assertSession()
            ->responseContains("Apply");
        $this->assertSession()
            ->responseContains('<div class="views-row">');
    }
    
    /**
     * Tests the exposed form with a pager.
     */
    public function testExposedFilterPagination() {
        $this->drupalCreateContentType([
            'type' => 'post',
        ]);
        // Create some random nodes.
        for ($i = 0; $i < 5; $i++) {
            $this->drupalCreateNode([
                'type' => 'post',
            ]);
        }
        $this->drupalGet('test_exposed_form_pager');
        $this->getSession()
            ->getPage()
            ->fillField('type[]', 'post');
        $this->getSession()
            ->getPage()
            ->fillField('created[min]', '-1 month');
        $this->getSession()
            ->getPage()
            ->fillField('created[max]', '+1 month');
        // Ensure the filters can be applied.
        $this->getSession()
            ->getPage()
            ->pressButton('Apply');
        $this->assertTrue($this->assertSession()
            ->optionExists('type[]', 'post')
            ->isSelected());
        $this->assertSession()
            ->fieldValueEquals('created[min]', '-1 month');
        $this->assertSession()
            ->fieldValueEquals('created[max]', '+1 month');
        // Ensure the filters are still applied after pressing next.
        $this->clickLink('Next ›');
        $this->assertTrue($this->assertSession()
            ->optionExists('type[]', 'post')
            ->isSelected());
        $this->assertSession()
            ->fieldValueEquals('created[min]', '-1 month');
        $this->assertSession()
            ->fieldValueEquals('created[max]', '+1 month');
    }
    
    /**
     * Asserts that nodes of only given bundles exist.
     *
     * @param array $bundles
     *   Bundles of nodes.
     *
     * @internal
     */
    protected function assertNodesExist(array $bundles) : void {
        foreach ($this->nodes as $node) {
            if (in_array($node->bundle(), $bundles)) {
                $this->assertSession()
                    ->pageTextContains($node->label());
            }
            else {
                $this->assertSession()
                    ->pageTextNotContains($node->label());
            }
        }
    }
    
    /**
     * Tests the "Remember the last selection" functionality.
     */
    public function testRememberSelected() {
        $this->drupalGet('test_remember_selected');
        $this->getSession()
            ->getPage()
            ->fillField('type', 'page');
        $this->getSession()
            ->getPage()
            ->pressButton('Apply');
        // Reload the page and ensure the filter is selected.
        $this->drupalGet('test_remember_selected');
        $this->assertTrue($this->assertSession()
            ->optionExists('type', 'page')
            ->isSelected());
    }

}