class BookMultilingualTest

class BookMultilingualTest extends KernelTestBase {
    use UserCreationTrait;
    
    /**
     * The translation langcode.
     */
    const LANGCODE = 'de';
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
        'user',
        'node',
        'field',
        'text',
        'book',
        'language',
        'content_translation',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Create the translation language.
        $this->installConfig([
            'language',
        ]);
        ConfigurableLanguage::create([
            'id' => self::LANGCODE,
        ])->save();
        // Set up language negotiation.
        $config = $this->config('language.types');
        $config->set('configurable', [
            LanguageInterface::TYPE_INTERFACE,
            LanguageInterface::TYPE_CONTENT,
        ]);
        // The language being tested should only be available as the content
        // language so subsequent tests catch errors where the interface language
        // is used instead of the content language. For this, the interface
        // language is set to the user language and ::setCurrentLanguage() will
        // set the user language to the language not being tested.
        $config->set('negotiation', [
            LanguageInterface::TYPE_INTERFACE => [
                'enabled' => [
                    LanguageNegotiationUser::METHOD_ID => 0,
                ],
            ],
            LanguageInterface::TYPE_CONTENT => [
                'enabled' => [
                    LanguageNegotiationUrl::METHOD_ID => 0,
                ],
            ],
        ]);
        $config->save();
        $config = $this->config('language.negotiation');
        $config->set('url.source', LanguageNegotiationUrl::CONFIG_DOMAIN);
        $config->set('url.domains', [
            'en' => 'en.book.test.domain',
            self::LANGCODE => self::LANGCODE . '.book.test.domain',
        ]);
        $config->save();
        $this->container
            ->get('kernel')
            ->rebuildContainer();
        $this->installEntitySchema('node');
        $this->installEntitySchema('user');
        $this->installSchema('book', [
            'book',
        ]);
        $this->installSchema('node', [
            'node_access',
        ]);
        $this->installSchema('system', [
            'sequences',
        ]);
        $this->installConfig([
            'node',
            'book',
            'field',
        ]);
        $node_type = NodeType::create([
            'type' => $this->randomMachineName(),
            'name' => $this->randomString(),
        ]);
        $node_type->save();
        $this->container
            ->get('content_translation.manager')
            ->setEnabled('node', $node_type->id(), TRUE);
        $book_config = $this->config('book.settings');
        $allowed_types = $book_config->get('allowed_types');
        $allowed_types[] = $node_type->id();
        $book_config->set('allowed_types', $allowed_types)
            ->save();
        // To test every possible combination of root-child / child-child, two
        // trees are needed. The first level below the root needs to have two
        // leaves and similarly a second level is needed with two-two leaves each:
        //
        //        1
        //      /   \
        //     /     \
        //    2       3
        //   / \     / \
        //  /   \   /   \
        // 4     5 6     7
        //
        // These are the actual node IDs, these are enforced as auto increment is
        // not reliable.
        //
        // Similarly, the second tree root is node 8, the first two leaves are
        // 9 and 10, the third level is 11, 12, 13, 14.
        for ($root = 1; $root <= 8; $root += 7) {
            for ($i = 0; $i <= 6; $i++) {
                
                /** @var \Drupal\node\NodeInterface $node */
                $node = Node::create([
                    'title' => $this->randomString(),
                    'type' => $node_type->id(),
                ]);
                $node->addTranslation(self::LANGCODE, [
                    'title' => $this->randomString(),
                ]);
                switch ($i) {
                    case 0:
                        $node->book['bid'] = 'new';
                        $node->book['pid'] = 0;
                        $node->book['depth'] = 1;
                        break;
                    case 1:
                    case 2:
                        $node->book['bid'] = $root;
                        $node->book['pid'] = $root;
                        $node->book['depth'] = 2;
                        break;
                    case 3:
                    case 4:
                        $node->book['bid'] = $root;
                        $node->book['pid'] = $root + 1;
                        $node->book['depth'] = 3;
                        break;
                    case 5:
                    case 6:
                        $node->book['bid'] = $root;
                        $node->book['pid'] = $root + 2;
                        $node->book['depth'] = 3;
                        break;
                }
                // This is necessary to make the table of contents consistent across
                // test runs.
                $node->book['weight'] = $i;
                $node->nid->value = $root + $i;
                $node->enforceIsNew();
                $node->save();
            }
        }
        \Drupal::currentUser()->setAccount($this->createUser([
            'access content',
        ]));
    }
    
    /**
     * Tests various book manager methods return correct translations.
     *
     * @dataProvider langcodesProvider
     */
    public function testMultilingualBookManager(string $langcode) {
        $this->setCurrentLanguage($langcode);
        
        /** @var \Drupal\book\BookManagerInterface $bm */
        $bm = $this->container
            ->get('book.manager');
        $books = $bm->getAllBooks();
        $this->assertNotEmpty($books);
        foreach ($books as $book) {
            $bid = $book['bid'];
            $build = $bm->bookTreeOutput($bm->bookTreeAllData($bid));
            $items = $build['#items'];
            $this->assertBookItemIsCorrectlyTranslated($items[$bid], $langcode);
            $this->assertBookItemIsCorrectlyTranslated($items[$bid]['below'][$bid + 1], $langcode);
            $this->assertBookItemIsCorrectlyTranslated($items[$bid]['below'][$bid + 1]['below'][$bid + 3], $langcode);
            $this->assertBookItemIsCorrectlyTranslated($items[$bid]['below'][$bid + 1]['below'][$bid + 4], $langcode);
            $this->assertBookItemIsCorrectlyTranslated($items[$bid]['below'][$bid + 2], $langcode);
            $this->assertBookItemIsCorrectlyTranslated($items[$bid]['below'][$bid + 2]['below'][$bid + 5], $langcode);
            $this->assertBookItemIsCorrectlyTranslated($items[$bid]['below'][$bid + 2]['below'][$bid + 6], $langcode);
            $toc = $bm->getTableOfContents($bid, 4);
            // Root entry does not have an indent.
            $this->assertToCEntryIsCorrectlyTranslated($toc, $langcode, $bid, '');
            // The direct children of the root have one indent.
            $this->assertToCEntryIsCorrectlyTranslated($toc, $langcode, $bid + 1, '--');
            $this->assertToCEntryIsCorrectlyTranslated($toc, $langcode, $bid + 2, '--');
            // Their children have two indents.
            $this->assertToCEntryIsCorrectlyTranslated($toc, $langcode, $bid + 3, '----');
            $this->assertToCEntryIsCorrectlyTranslated($toc, $langcode, $bid + 4, '----');
            $this->assertToCEntryIsCorrectlyTranslated($toc, $langcode, $bid + 5, '----');
            $this->assertToCEntryIsCorrectlyTranslated($toc, $langcode, $bid + 6, '----');
            // $bid might be a string.
            $this->assertSame([
                $bid + 0,
                $bid + 1,
                $bid + 3,
                $bid + 4,
                $bid + 2,
                $bid + 5,
                $bid + 6,
            ], array_keys($toc));
        }
    }
    
    /**
     * Tests various book breadcrumb builder methods return correct translations.
     *
     * @dataProvider langcodesProvider
     */
    public function testMultilingualBookBreadcrumbBuilder(string $langcode) {
        $this->setCurrentLanguage($langcode);
        // Test a level 3 node.
        $nid = 7;
        
        /** @var \Drupal\node\NodeInterface $node */
        $node = Node::load($nid);
        $route = new Route('/node/{node}');
        $route_match = new RouteMatch('entity.node.canonical', $route, [
            'node' => $node,
        ], [
            'node' => $nid,
        ]);
        
        /** @var \Drupal\book\BookBreadcrumbBuilder $bbb */
        $bbb = $this->container
            ->get('book.breadcrumb');
        $links = $bbb->build($route_match)
            ->getLinks();
        $link = array_shift($links);
        $rendered_link = Link::fromTextAndUrl($link->getText(), $link->getUrl())
            ->toString();
        $this->assertStringContainsString("http://{$langcode}.book.test.domain/", $rendered_link);
        $link = array_shift($links);
        $this->assertNodeLinkIsCorrectlyTranslated(1, $link->getText(), $link->getUrl(), $langcode);
        $link = array_shift($links);
        $this->assertNodeLinkIsCorrectlyTranslated(3, $link->getText(), $link->getUrl(), $langcode);
        $this->assertEmpty($links);
    }
    
    /**
     * Tests the book export returns correct translations.
     *
     * @dataProvider langcodesProvider
     */
    public function testMultilingualBookExport(string $langcode) {
        $this->setCurrentLanguage($langcode);
        
        /** @var \Drupal\book\BookExport $be */
        $be = $this->container
            ->get('book.export');
        
        /** @var \Drupal\book\BookManagerInterface $bm */
        $bm = $this->container
            ->get('book.manager');
        $books = $bm->getAllBooks();
        $this->assertNotEmpty($books);
        foreach ($books as $book) {
            $contents = $be->bookExportHtml(Node::load($book['bid']))['#contents'][0];
            $this->assertSame($contents["#node"]->language()
                ->getId(), $langcode);
            $this->assertSame($contents["#children"][0]["#node"]->language()
                ->getId(), $langcode);
            $this->assertSame($contents["#children"][1]["#node"]->language()
                ->getId(), $langcode);
            $this->assertSame($contents["#children"][0]["#children"][0]["#node"]->language()
                ->getId(), $langcode);
            $this->assertSame($contents["#children"][0]["#children"][1]["#node"]->language()
                ->getId(), $langcode);
            $this->assertSame($contents["#children"][1]["#children"][0]["#node"]->language()
                ->getId(), $langcode);
            $this->assertSame($contents["#children"][1]["#children"][1]["#node"]->language()
                ->getId(), $langcode);
        }
    }
    
    /**
     * Data provider for ::testMultilingualBooks().
     */
    public function langcodesProvider() {
        return [
            [
                self::LANGCODE,
            ],
            [
                'en',
            ],
        ];
    }
    
    /**
     * Sets the current language.
     *
     * @param string $langcode
     *   The langcode. The content language will be set to this using the
     *   appropriate domain while the user language will be set to something
     *   else so subsequent tests catch errors where the interface language
     *   is used instead of the content language.
     */
    protected function setCurrentLanguage(string $langcode) : void {
        \Drupal::requestStack()->push(Request::create("http://{$langcode}.book.test.domain/"));
        $language_manager = $this->container
            ->get('language_manager');
        $language_manager->reset();
        $current_user = \Drupal::currentUser();
        $languages = $language_manager->getLanguages();
        unset($languages[$langcode]);
        $current_user->getAccount()
            ->set('preferred_langcode', reset($languages)->getId());
        $this->assertNotSame($current_user->getPreferredLangcode(), $langcode);
    }
    
    /**
     * Asserts a book item is correctly translated.
     *
     * @param array $item
     *   A book tree item.
     * @param string $langcode
     *   The language code for the requested translation.
     *
     * @internal
     */
    protected function assertBookItemIsCorrectlyTranslated(array $item, string $langcode) : void {
        $this->assertNodeLinkIsCorrectlyTranslated($item['original_link']['nid'], $item['title'], $item['url'], $langcode);
    }
    
    /**
     * Asserts a node link is correctly translated.
     *
     * @param int $nid
     *   The node id.
     * @param string $title
     *   The expected title.
     * @param \Drupal\Core\Url $url
     *   The URL being tested.
     * @param string $langcode
     *   The language code.
     *
     * @internal
     */
    protected function assertNodeLinkIsCorrectlyTranslated(int $nid, string $title, Url $url, string $langcode) : void {
        $node = Node::load($nid);
        $this->assertSame($node->getTranslation($langcode)
            ->label(), $title);
        $rendered_link = Link::fromTextAndUrl($title, $url)->toString();
        $this->assertStringContainsString("http://{$langcode}.book.test.domain/node/{$nid}", $rendered_link);
    }
    
    /**
     * Asserts one entry in the table of contents is correct.
     *
     * @param array $toc
     *   The entire table of contents array.
     * @param string $langcode
     *   The language code for the requested translation.
     * @param int $nid
     *   The node ID.
     * @param string $indent
     *   The indentation before the actual table of contents label.
     *
     * @internal
     */
    protected function assertToCEntryIsCorrectlyTranslated(array $toc, string $langcode, int $nid, string $indent) : void {
        $node = Node::load($nid);
        $node_label = $node->getTranslation($langcode)
            ->label();
        $this->assertSame($indent . ' ' . $node_label, $toc[$nid]);
    }

}