class FileFieldWidgetTest

class FileFieldWidgetTest extends WebDriverTestBase {
    use FieldUiTestTrait;
    use FileFieldCreationTrait;
    use TestFileCreationTrait;
    
    /**
     * An user with administration permissions.
     *
     * @var \Drupal\user\UserInterface
     */
    protected $adminUser;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'node',
        'file',
        'file_module_test',
        'field_ui',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->adminUser = $this->drupalCreateUser([
            'access content',
            'access administration pages',
            'administer site configuration',
            'administer users',
            'administer permissions',
            'administer content types',
            'administer node fields',
            'administer node display',
            'administer nodes',
            'bypass node access',
        ]);
        $this->drupalLogin($this->adminUser);
        $this->drupalCreateContentType([
            'type' => 'article',
            'name' => 'Article',
        ]);
    }
    
    /**
     * Tests upload and remove buttons for multiple multi-valued File fields.
     */
    public function testMultiValuedWidget() : void {
        $type_name = 'article';
        $field_name = 'test_file_field_1';
        $field_name2 = 'test_file_field_2';
        $cardinality = 3;
        $this->createFileField($field_name, 'node', $type_name, [
            'cardinality' => $cardinality,
        ]);
        $this->createFileField($field_name2, 'node', $type_name, [
            'cardinality' => $cardinality,
        ]);
        $page = $this->getSession()
            ->getPage();
        $assert_session = $this->assertSession();
        $test_file = current($this->getTestFiles('text'));
        $test_file_path = \Drupal::service('file_system')->realpath($test_file->uri);
        $this->drupalGet("node/add/{$type_name}");
        foreach ([
            $field_name2,
            $field_name,
        ] as $each_field_name) {
            for ($delta = 0; $delta < 3; $delta++) {
                $page->attachFileToField('files[' . $each_field_name . '_' . $delta . '][]', $test_file_path);
                $this->assertNotNull($assert_session->waitForElementVisible('css', '[name="' . $each_field_name . '_' . $delta . '_remove_button"]'));
                $this->assertNull($assert_session->waitForButton($each_field_name . '_' . $delta . '_upload_button'));
            }
        }
        $num_expected_remove_buttons = 6;
        foreach ([
            $field_name,
            $field_name2,
        ] as $current_field_name) {
            // How many uploaded files for the current field are remaining.
            $remaining = 3;
            // Test clicking each "Remove" button. For extra robustness, test them out
            // of sequential order. They are 0-indexed, and get renumbered after each
            // iteration, so array(1, 1, 0) means:
            // - First remove the 2nd file.
            // - Then remove what is then the 2nd file (was originally the 3rd file).
            // - Then remove the first file.
            foreach ([
                1,
                1,
                0,
            ] as $delta) {
                // Ensure we have the expected number of Remove buttons, and that they
                // are numbered sequentially.
                $buttons = $this->xpath('//input[@type="submit" and @value="Remove"]');
                $this->assertCount($num_expected_remove_buttons, $buttons, 'There are ' . $num_expected_remove_buttons . ' "Remove" buttons displayed.');
                foreach ($buttons as $i => $button) {
                    $key = $i >= $remaining ? $i - $remaining : $i;
                    $check_field_name = $field_name2;
                    if ($current_field_name == $field_name && $i < $remaining) {
                        $check_field_name = $field_name;
                    }
                    $this->assertSame($check_field_name . '_' . $key . '_remove_button', $button->getAttribute('name'));
                }
                $button_name = $current_field_name . '_' . $delta . '_remove_button';
                $remove_button = $assert_session->waitForButton($button_name);
                $remove_button->click();
                $num_expected_remove_buttons--;
                $remaining--;
                // Ensure an "Upload" button for the current field is displayed with the
                // correct name.
                $upload_button_name = $current_field_name . '_' . $remaining . '_upload_button';
                $this->assertNotNull($assert_session->waitForButton($upload_button_name));
                $button = $this->assertSession()
                    ->buttonExists($upload_button_name);
                $this->assertSame('Upload', $button->getValue());
                // Verify that after removing a file, only one "Upload" button for each
                // possible field is displayed.
                $expected = $current_field_name == $field_name ? 1 : 2;
                $this->assertSession()
                    ->elementsCount('xpath', '//input[@type="submit" and @value="Upload"]', $expected);
            }
        }
    }
    
    /**
     * Tests uploading and remove buttons for a single-valued File field.
     */
    public function testSingleValuedWidget() : void {
        $type_name = 'article';
        $field_name = 'test_file_field_1';
        $cardinality = 1;
        $this->createFileField($field_name, 'node', $type_name, [
            'cardinality' => $cardinality,
        ]);
        $page = $this->getSession()
            ->getPage();
        $assert_session = $this->assertSession();
        $test_file = current($this->getTestFiles('text'));
        $test_file_path = \Drupal::service('file_system')->realpath($test_file->uri);
        $this->drupalGet("node/add/{$type_name}");
        $page->findField('title[0][value]')
            ->setValue($this->randomString());
        $page->attachFileToField('files[' . $field_name . '_0]', $test_file_path);
        $remove_button = $assert_session->waitForElementVisible('css', '[name="' . $field_name . '_0_remove_button"]');
        $this->assertNotNull($remove_button);
        $remove_button->click();
        $upload_field = $assert_session->waitForElementVisible('css', 'input[type="file"]');
        $this->assertNotEmpty($upload_field);
        $page->attachFileToField('files[' . $field_name . '_0]', $test_file_path);
        $remove_button = $assert_session->waitForElementVisible('css', '[name="' . $field_name . '_0_remove_button"]');
        $this->assertNotNull($remove_button);
        $page->pressButton('Save');
        $page->hasContent($test_file->name);
        // Create a new node and try to upload a file with an invalid extension.
        $test_image = current($this->getTestFiles('image'));
        $test_image_path = \Drupal::service('file_system')->realpath($test_image->uri);
        $this->drupalGet("node/add/{$type_name}");
        $page->findField('title[0][value]')
            ->setValue($this->randomString());
        $page->attachFileToField('files[' . $field_name . '_0]', $test_image_path);
        $messages = $assert_session->waitForElementVisible('css', '.file-upload-js-error');
        $this->assertEquals('The selected file image-test.png cannot be uploaded. Only files with the following extensions are allowed: txt.', $messages->getText());
        // Make sure the error disappears when a valid file is uploaded.
        $page->attachFileToField('files[' . $field_name . '_0]', $test_file_path);
        $remove_button = $assert_session->waitForElementVisible('css', '[name="' . $field_name . '_0_remove_button"]');
        $this->assertNotEmpty($remove_button);
        $this->assertEmpty($this->cssSelect('.file-upload-js-error'));
    }
    
    /**
     * Tests uploading more files than allowed at once.
     */
    public function testUploadingMoreFilesThanAllowed() : void {
        $type_name = 'article';
        $field_name = 'test_file_field_1';
        $cardinality = 2;
        $this->createFileField($field_name, 'node', $type_name, [
            'cardinality' => $cardinality,
        ]);
        $web_driver = $this->getSession()
            ->getDriver();
        $file_system = \Drupal::service('file_system');
        $files = array_slice($this->getTestFiles('text'), 0, 3);
        $real_paths = [];
        foreach ($files as $file) {
            $real_paths[] = $file_system->realpath($file->uri);
        }
        $remote_paths = [];
        foreach ($real_paths as $path) {
            $remote_paths[] = $web_driver->uploadFileAndGetRemoteFilePath($path);
        }
        // Tests that uploading multiple remote files works with remote path.
        $this->drupalGet("node/add/{$type_name}");
        $multiple_field = $this->getSession()
            ->getPage()
            ->findField('files[test_file_field_1_0][]');
        $multiple_field->setValue(implode("\n", $remote_paths));
        $this->assertSession()
            ->assertWaitOnAjaxRequest();
        $this->assertSession()
            ->pageTextContains("Field {$field_name} can only hold {$cardinality} values but there were 3 uploaded. The following files have been omitted as a result: text-2.txt.");
    }
    
    /**
     * Retrieves a sample file of the specified type.
     *
     * @return \Drupal\file\FileInterface
     *   The new unsaved file entity.
     */
    public function getTestFile($type_name, $size = NULL) {
        // Get a file to upload.
        $file = current($this->getTestFiles($type_name, $size));
        // Add a filesize property to files as would be read by
        // \Drupal\file\Entity\File::load().
        $file->filesize = filesize($file->uri);
        return File::create((array) $file);
    }

}