class BlockLanguageTest

class BlockLanguageTest extends BrowserTestBase {
    
    /**
     * An administrative user to configure the test environment.
     */
    protected $adminUser;
    
    /**
     * Modules to install.
     *
     * @var array
     */
    protected static $modules = [
        'language',
        'block',
        'content_translation',
        'node',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->adminUser = $this->drupalCreateUser([
            'administer blocks',
            'administer languages',
        ]);
        $this->drupalLogin($this->adminUser);
        // Add predefined language.
        $edit = [
            'predefined_langcode' => 'fr',
        ];
        $this->drupalGet('admin/config/regional/language/add');
        $this->submitForm($edit, 'Add language');
        // Verify that language was added successfully.
        $this->assertSession()
            ->pageTextContains('French');
        // Set path prefixes for both languages.
        $this->config('language.negotiation')
            ->set('url', [
            'source' => 'path_prefix',
            'prefixes' => [
                'en' => 'en',
                'fr' => 'fr',
            ],
        ])
            ->save();
        $this->drupalCreateContentType([
            'type' => 'page',
        ]);
        $this->drupalCreateNode();
    }
    
    /**
     * Tests the visibility settings for the blocks based on language.
     */
    public function testLanguageBlockVisibility() : void {
        // Check if the visibility setting is available.
        $default_theme = $this->config('system.theme')
            ->get('default');
        $this->drupalGet('admin/structure/block/add/system_powered_by_block' . '/' . $default_theme);
        // Ensure that the language visibility field is visible without a type
        // setting.
        $this->assertSession()
            ->fieldExists('visibility[language][langcodes][en]');
        $this->assertSession()
            ->fieldNotExists('visibility[language][context_mapping][language]');
        // Enable a standard block and set the visibility setting for one language.
        $edit = [
            'visibility[language][langcodes][en]' => TRUE,
            'id' => $this->randomMachineName(8),
            'region' => 'sidebar_first',
        ];
        $this->drupalGet('admin/structure/block/add/system_powered_by_block' . '/' . $default_theme);
        $this->submitForm($edit, 'Save block');
        // Change the default language.
        $edit = [
            'site_default_language' => 'fr',
        ];
        $this->drupalGet('admin/config/regional/language');
        $this->submitForm($edit, 'Save configuration');
        // Check that a page has a block.
        $this->drupalGet('en');
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->pageTextContains('Powered by Drupal');
        // Check that a page doesn't has a block for the current language anymore.
        $this->drupalGet('fr');
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->pageTextNotContains('Powered by Drupal');
    }
    
    /**
     * Tests if the visibility settings are removed if the language is deleted.
     */
    public function testLanguageBlockVisibilityLanguageDelete() : void {
        // Enable a standard block and set the visibility setting for one language.
        $edit = [
            'visibility' => [
                'language' => [
                    'langcodes' => [
                        'fr' => 'fr',
                    ],
                    'context_mapping' => [
                        'language' => '@language.current_language_context:language_interface',
                    ],
                ],
            ],
        ];
        $block = $this->drupalPlaceBlock('system_powered_by_block', $edit);
        // Check that we have the language in config after saving the setting.
        $visibility = $block->getVisibility();
        $this->assertEquals('fr', $visibility['language']['langcodes']['fr'], 'Language is set in the block configuration.');
        // Delete the language.
        $this->drupalGet('admin/config/regional/language/delete/fr');
        $this->submitForm([], 'Delete');
        // Check that the language is no longer stored in the configuration after
        // it is deleted.
        $block = Block::load($block->id());
        $visibility = $block->getVisibility();
        $this->assertArrayNotHasKey('language', $visibility, 'Language is no longer not set in the block configuration after deleting the block.');
        // Ensure that the block visibility for language is gone from the UI.
        $this->drupalGet('admin/structure/block');
        $this->clickLink('Configure');
        $this->assertSession()
            ->elementNotExists('xpath', '//details[@id="edit-visibility-language"]');
    }
    
    /**
     * Tests block language visibility with different language types.
     */
    public function testMultipleLanguageTypes() : void {
        // Customize content language detection to be different from interface
        // language detection.
        $edit = [
            // Interface language detection: only using session.
'language_interface[enabled][language-url]' => FALSE,
            'language_interface[enabled][language-session]' => TRUE,
            // Content language detection: only using URL.
'language_content[configurable]' => TRUE,
            'language_content[enabled][language-url]' => TRUE,
            'language_content[enabled][language-interface]' => FALSE,
        ];
        $this->drupalGet('admin/config/regional/language/detection');
        $this->submitForm($edit, 'Save settings');
        // Check if the visibility setting is available with a type setting.
        $default_theme = $this->config('system.theme')
            ->get('default');
        $this->drupalGet('admin/structure/block/add/system_powered_by_block' . '/' . $default_theme);
        $this->assertSession()
            ->fieldExists('visibility[language][langcodes][en]');
        $this->assertSession()
            ->fieldExists('visibility[language][context_mapping][language]');
        // Enable a standard block and set visibility to French only.
        $block_id = $this->randomMachineName(8);
        $edit = [
            'visibility[language][context_mapping][language]' => '@language.current_language_context:language_interface',
            'visibility[language][langcodes][fr]' => TRUE,
            'id' => $block_id,
            'region' => 'sidebar_first',
        ];
        $this->drupalGet('admin/structure/block/add/system_powered_by_block' . '/' . $default_theme);
        $this->submitForm($edit, 'Save block');
        // Interface negotiation depends on request arguments.
        $this->drupalGet('node/1', [
            'query' => [
                'language' => 'en',
            ],
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->pageTextNotContains('Powered by Drupal');
        $this->drupalGet('node/1', [
            'query' => [
                'language' => 'fr',
            ],
        ]);
        $this->assertSession()
            ->pageTextContains('Powered by Drupal');
        // Log in again in order to clear the interface language stored in the
        // session.
        $this->drupalLogout();
        $this->drupalLogin($this->adminUser);
        // Content language does not depend on session/request arguments.
        // It will fall back on English (site default) and not display the block.
        $this->drupalGet('en');
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->pageTextNotContains('Powered by Drupal');
        $this->drupalGet('fr');
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->pageTextNotContains('Powered by Drupal');
        // Change visibility to now depend on content language for this block.
        $edit = [
            'visibility[language][context_mapping][language]' => '@language.current_language_context:language_content',
        ];
        $this->drupalGet('admin/structure/block/manage/' . $block_id);
        $this->submitForm($edit, 'Save block');
        // Content language negotiation does not depend on request arguments.
        // It will fall back on English (site default) and not display the block.
        $this->drupalGet('node/1', [
            'query' => [
                'language' => 'en',
            ],
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->pageTextNotContains('Powered by Drupal');
        $this->drupalGet('node/1', [
            'query' => [
                'language' => 'fr',
            ],
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->pageTextNotContains('Powered by Drupal');
        // Content language negotiation depends on path prefix.
        $this->drupalGet('en');
        $this->assertSession()
            ->pageTextNotContains('Powered by Drupal');
        $this->drupalGet('fr');
        $this->assertSession()
            ->pageTextContains('Powered by Drupal');
    }

}