class CKEditorLoadingTest

class CKEditorLoadingTest extends BrowserTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'filter',
        'editor',
        'ckeditor',
        'node',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * An untrusted user with access to only the 'plain_text' format.
     *
     * @var \Drupal\user\UserInterface
     */
    protected $untrustedUser;
    
    /**
     * A normal user with access to the 'plain_text' and 'filtered_html' formats.
     *
     * @var \Drupal\user\UserInterface
     */
    protected $normalUser;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Create text format, associate CKEditor.
        $filtered_html_format = FilterFormat::create([
            'format' => 'filtered_html',
            'name' => 'Filtered HTML',
            'weight' => 0,
            'filters' => [],
        ]);
        $filtered_html_format->save();
        $editor = Editor::create([
            'format' => 'filtered_html',
            'editor' => 'ckeditor',
        ]);
        $editor->save();
        // Create a second format without an associated editor so a drop down select
        // list is created when selecting formats.
        $full_html_format = FilterFormat::create([
            'format' => 'full_html',
            'name' => 'Full HTML',
            'weight' => 1,
            'filters' => [],
        ]);
        $full_html_format->save();
        // Create node type.
        $this->drupalCreateContentType([
            'type' => 'article',
            'name' => 'Article',
        ]);
        $this->untrustedUser = $this->drupalCreateUser([
            'create article content',
            'edit any article content',
        ]);
        $this->normalUser = $this->drupalCreateUser([
            'create article content',
            'edit any article content',
            'use text format filtered_html',
            'use text format full_html',
        ]);
    }
    
    /**
     * Tests loading of CKEditor CSS, JS and JS settings.
     */
    public function testLoading() {
        // The untrusted user:
        // - has access to 1 text format (plain_text);
        // - doesn't have access to the filtered_html text format, so: no text editor.
        $this->drupalLogin($this->untrustedUser);
        $this->drupalGet('node/add/article');
        [
            $settings,
            $editor_settings_present,
            $editor_js_present,
        ] = $this->getThingsToCheck();
        $this->assertFalse($editor_settings_present, 'No Text Editor module settings.');
        $this->assertFalse($editor_js_present, 'No Text Editor JavaScript.');
        $this->assertSession()
            ->fieldExists('edit-body-0-value');
        $this->assertSession()
            ->elementNotExists('css', 'select.js-filter-list');
        // Verify that a single text format hidden input does not exist on the page.
        $this->assertSession()
            ->elementNotExists('xpath', '//input[@type="hidden" and contains(@class, "editor")]');
        // Verify that CKEditor glue JS is absent.
        $this->assertSession()
            ->responseNotContains($this->getModulePath('ckeditor') . '/js/ckeditor.js');
        // On pages where there would never be a text editor, CKEditor JS is absent.
        $this->drupalGet('user');
        $this->assertSession()
            ->responseNotContains($this->getModulePath('ckeditor') . '/js/ckeditor.js');
        // The normal user:
        // - has access to 2 text formats;
        // - does have access to the filtered_html text format, so: CKEditor.
        $this->drupalLogin($this->normalUser);
        $this->drupalGet('node/add/article');
        [
            $settings,
            $editor_settings_present,
            $editor_js_present,
        ] = $this->getThingsToCheck();
        $ckeditor_plugin = $this->container
            ->get('plugin.manager.editor')
            ->createInstance('ckeditor');
        $editor = Editor::load('filtered_html');
        $expected = [
            'formats' => [
                'filtered_html' => [
                    'format' => 'filtered_html',
                    'editor' => 'ckeditor',
                    'editorSettings' => $ckeditor_plugin->getJSSettings($editor),
                    'editorSupportsContentFiltering' => TRUE,
                    'isXssSafe' => FALSE,
                ],
            ],
        ];
        $this->assertTrue($editor_settings_present, "Text Editor module's JavaScript settings are on the page.");
        $this->assertEquals($expected, $settings['editor'], "Text Editor module's JavaScript settings on the page are correct.");
        $this->assertTrue($editor_js_present, 'Text Editor JavaScript is present.');
        $this->assertSession()
            ->fieldExists('edit-body-0-value');
        // Verify that a single text format selector exists on the page and has a
        // "data-editor-for" attribute with the correct value.
        $this->assertSession()
            ->elementsCount('css', 'select.js-filter-list', 1);
        $select = $this->assertSession()
            ->elementExists('css', 'select.js-filter-list');
        $this->assertSame('edit-body-0-value', $select->getAttribute('data-editor-for'));
        $this->assertContains('ckeditor/drupal.ckeditor', explode(',', $settings['ajaxPageState']['libraries']), 'CKEditor glue library is present.');
        // Enable the ckeditor_test module, customize configuration. In this case,
        // there is additional CSS and JS to be loaded.
        // NOTE: the tests in CKEditorTest already ensure that changing the
        // configuration also results in modified CKEditor configuration, so we
        // don't test that here.
        \Drupal::service('module_installer')->install([
            'ckeditor_test',
        ]);
        $this->container
            ->get('plugin.manager.ckeditor.plugin')
            ->clearCachedDefinitions();
        $editor_settings = $editor->getSettings();
        $editor_settings['toolbar']['rows'][0][0]['items'][] = 'Llama';
        $editor->setSettings($editor_settings);
        $editor->save();
        $this->drupalGet('node/add/article');
        [
            $settings,
            $editor_settings_present,
            $editor_js_present,
        ] = $this->getThingsToCheck();
        $expected = [
            'formats' => [
                'filtered_html' => [
                    'format' => 'filtered_html',
                    'editor' => 'ckeditor',
                    'editorSettings' => $ckeditor_plugin->getJSSettings($editor),
                    'editorSupportsContentFiltering' => TRUE,
                    'isXssSafe' => FALSE,
                ],
            ],
        ];
        $this->assertTrue($editor_settings_present, "Text Editor module's JavaScript settings are on the page.");
        $this->assertEquals($expected, $settings['editor'], "Text Editor module's JavaScript settings on the page are correct.");
        $this->assertTrue($editor_js_present, 'Text Editor JavaScript is present.');
        $this->assertContains('ckeditor/drupal.ckeditor', explode(',', $settings['ajaxPageState']['libraries']), 'CKEditor glue library is present.');
        // Assert that CKEditor uses Drupal's cache-busting query string by
        // comparing the setting sent with the page with the current query string.
        $settings = $this->getDrupalSettings();
        $expected = $settings['ckeditor']['timestamp'];
        $this->assertSame($expected, \Drupal::state()->get('system.css_js_query_string'), "CKEditor scripts cache-busting string is correct before flushing all caches.");
        // Flush all caches then make sure that $settings['ckeditor']['timestamp']
        // still matches.
        $this->resetAll();
        $this->assertSame($expected, \Drupal::state()->get('system.css_js_query_string'), "CKEditor scripts cache-busting string is correct after flushing all caches.");
    }
    
    /**
     * Tests presence of essential configuration even without Internal's buttons.
     */
    public function testLoadingWithoutInternalButtons() {
        // Change the CKEditor text editor configuration to only have link buttons.
        // This means:
        // - 0 buttons are from \Drupal\ckeditor\Plugin\CKEditorPlugin\Internal
        // - 2 buttons are from \Drupal\ckeditor\Plugin\CKEditorPlugin\DrupalLink
        $filtered_html_editor = Editor::load('filtered_html');
        $settings = $filtered_html_editor->getSettings();
        $settings['toolbar']['rows'] = [
            0 => [
                0 => [
                    'name' => 'Links',
                    'items' => [
                        'DrupalLink',
                        'DrupalUnlink',
                    ],
                ],
            ],
        ];
        $filtered_html_editor->setSettings($settings)
            ->save();
        // Even when no buttons of \Drupal\ckeditor\Plugin\CKEditorPlugin\Internal
        // are in use, its configuration (Internal::getConfig()) is still essential:
        // this is configuration that is associated with the (custom, optimized)
        // build of CKEditor that Drupal core ships with. For example, it configures
        // CKEditor to not perform its default action of loading a config.js file,
        // to not convert special characters into HTML entities, and the allowedContent
        // setting to configure CKEditor's Advanced Content Filter.
        $this->drupalLogin($this->normalUser);
        $this->drupalGet('node/add/article');
        $editor_settings = $this->getDrupalSettings()['editor']['formats']['filtered_html']['editorSettings'];
        $this->assertTrue(isset($editor_settings['customConfig']));
        $this->assertTrue(isset($editor_settings['entities']));
        $this->assertTrue(isset($editor_settings['allowedContent']));
        $this->assertTrue(isset($editor_settings['disallowedContent']));
    }
    protected function getThingsToCheck() {
        $settings = $this->getDrupalSettings();
        return [
            // JavaScript settings.
$settings,
            // Editor.module's JS settings present.
isset($settings['editor']),
            // Editor.module's JS present. Note: ckeditor/drupal.ckeditor depends on
            // editor/drupal.editor, hence presence of the former implies presence of
            // the latter.
isset($settings['ajaxPageState']['libraries']) && in_array('ckeditor/drupal.ckeditor', explode(',', $settings['ajaxPageState']['libraries'])),
        ];
    }

}