class EntityViewBuilderTest

class EntityViewBuilderTest extends EntityKernelTestBase {
    use EntityReferenceTestTrait;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->installConfig([
            'user',
            'entity_test',
        ]);
        // Give anonymous users permission to view test entities.
        Role::load(RoleInterface::ANONYMOUS_ID)->grantPermission('view test entity')
            ->save();
    }
    
    /**
     * Tests entity render cache handling.
     */
    public function testEntityViewBuilderCache() {
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = $this->container
            ->get('renderer');
        $cache_contexts_manager = \Drupal::service("cache_contexts_manager");
        $cache = \Drupal::cache();
        // Force a request via GET so cache is rendered.
        $request = \Drupal::request();
        $request_method = $request->server
            ->get('REQUEST_METHOD');
        $request->setMethod('GET');
        $entity_test = $this->createTestEntity('entity_test');
        // Test that new entities (before they are saved for the first time) do not
        // generate a cache entry.
        $build = $this->container
            ->get('entity_type.manager')
            ->getViewBuilder('entity_test')
            ->view($entity_test, 'full');
        $this->assertNotEmpty($build['#cache']);
        $this->assertEquals([
            'tags',
            'contexts',
            'max-age',
        ], array_keys($build['#cache']), 'The render array element of new (unsaved) entities is not cached, but does have cache tags set.');
        // Get a fully built entity view render array.
        $entity_test->save();
        $build = $this->container
            ->get('entity_type.manager')
            ->getViewBuilder('entity_test')
            ->view($entity_test, 'full');
        $cid_parts = array_merge($build['#cache']['keys'], $cache_contexts_manager->convertTokensToKeys([
            'languages:' . LanguageInterface::TYPE_INTERFACE,
            'theme',
            'user.permissions',
        ])
            ->getKeys());
        $cid = implode(':', $cid_parts);
        $bin = $build['#cache']['bin'];
        // Mock the build array to not require the theme registry.
        unset($build['#theme']);
        $build['#markup'] = 'entity_render_test';
        // Test that a cache entry is created.
        $renderer->renderRoot($build);
        $this->assertNotEmpty($this->container
            ->get('cache.' . $bin)
            ->get($cid), 'The entity render element has been cached.');
        // Re-save the entity and check that the cache entry has been deleted.
        $cache->set('kittens', 'Kitten data', Cache::PERMANENT, $build['#cache']['tags']);
        $entity_test->save();
        $this->assertFalse($this->container
            ->get('cache.' . $bin)
            ->get($cid), 'The entity render cache has been cleared when the entity was saved.');
        $this->assertFalse($cache->get('kittens'), 'The entity saving has invalidated cache tags.');
        // Rebuild the render array (creating a new cache entry in the process) and
        // delete the entity to check the cache entry is deleted.
        unset($build['#printed']);
        $renderer->renderRoot($build);
        $this->assertNotEmpty($this->container
            ->get('cache.' . $bin)
            ->get($cid), 'The entity render element has been cached.');
        $entity_test->delete();
        $this->assertFalse($this->container
            ->get('cache.' . $bin)
            ->get($cid), 'The entity render cache has been cleared when the entity was deleted.');
        // Restore the previous request method.
        $request->setMethod($request_method);
    }
    
    /**
     * Tests entity render cache with references.
     */
    public function testEntityViewBuilderCacheWithReferences() {
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = $this->container
            ->get('renderer');
        $cache_contexts_manager = \Drupal::service("cache_contexts_manager");
        // Force a request via GET so we can get
        // \Drupal::service('renderer')->render() cache working.
        $request = \Drupal::request();
        $request_method = $request->server
            ->get('REQUEST_METHOD');
        $request->setMethod('GET');
        // Create an entity reference field and an entity that will be referenced.
        $this->createEntityReferenceField('entity_test', 'entity_test', 'reference_field', 'Reference', 'entity_test');
        \Drupal::service('entity_display.repository')->getViewDisplay('entity_test', 'entity_test', 'full')
            ->setComponent('reference_field', [
            'type' => 'entity_reference_entity_view',
            'settings' => [
                'link' => FALSE,
            ],
        ])
            ->save();
        $entity_test_reference = $this->createTestEntity('entity_test');
        $entity_test_reference->save();
        // Get a fully built entity view render array for the referenced entity.
        $build = $this->container
            ->get('entity_type.manager')
            ->getViewBuilder('entity_test')
            ->view($entity_test_reference, 'full');
        $cid_parts = array_merge($build['#cache']['keys'], $cache_contexts_manager->convertTokensToKeys([
            'languages:' . LanguageInterface::TYPE_INTERFACE,
            'theme',
            'user.permissions',
        ])
            ->getKeys());
        $cid_reference = implode(':', $cid_parts);
        $bin_reference = $build['#cache']['bin'];
        // Mock the build array to not require the theme registry.
        unset($build['#theme']);
        $build['#markup'] = 'entity_render_test';
        $renderer->renderRoot($build);
        // Test that a cache entry was created for the referenced entity.
        $this->assertNotEmpty($this->container
            ->get('cache.' . $bin_reference)
            ->get($cid_reference), 'The entity render element for the referenced entity has been cached.');
        // Create another entity that references the first one.
        $entity_test = $this->createTestEntity('entity_test');
        $entity_test->reference_field->entity = $entity_test_reference;
        $entity_test->save();
        // Get a fully built entity view render array.
        $build = $this->container
            ->get('entity_type.manager')
            ->getViewBuilder('entity_test')
            ->view($entity_test, 'full');
        $cid_parts = array_merge($build['#cache']['keys'], $cache_contexts_manager->convertTokensToKeys([
            'languages:' . LanguageInterface::TYPE_INTERFACE,
            'theme',
            'user.permissions',
        ])
            ->getKeys());
        $cid = implode(':', $cid_parts);
        $bin = $build['#cache']['bin'];
        // Mock the build array to not require the theme registry.
        unset($build['#theme']);
        $build['#markup'] = 'entity_render_test';
        $renderer->renderRoot($build);
        // Test that a cache entry is created.
        $this->assertNotEmpty($this->container
            ->get('cache.' . $bin)
            ->get($cid), 'The entity render element has been cached.');
        // Save the entity and verify that both cache entries have been deleted.
        $entity_test_reference->save();
        $this->assertFalse($this->container
            ->get('cache.' . $bin)
            ->get($cid), 'The entity render cache has been cleared when the entity was deleted.');
        $this->assertFalse($this->container
            ->get('cache.' . $bin_reference)
            ->get($cid_reference), 'The entity render cache for the referenced entity has been cleared when the entity was deleted.');
        // Restore the previous request method.
        $request->setMethod($request_method);
    }
    
    /**
     * Tests entity render cache toggling.
     */
    public function testEntityViewBuilderCacheToggling() {
        $entity_test = $this->createTestEntity('entity_test');
        $entity_test->save();
        // Test a view mode in default conditions: render caching is enabled for
        // the entity type and the view mode.
        $build = $this->container
            ->get('entity_type.manager')
            ->getViewBuilder('entity_test')
            ->view($entity_test, 'full');
        $this->assertNotEmpty($build['#cache']);
        $this->assertEquals([
            'tags',
            'contexts',
            'max-age',
            'keys',
            'bin',
        ], array_keys($build['#cache']), 'A view mode with render cache enabled has the correct output (cache tags, keys, contexts, max-age and bin).');
        // Test that a view mode can opt out of render caching.
        $build = $this->container
            ->get('entity_type.manager')
            ->getViewBuilder('entity_test')
            ->view($entity_test, 'test');
        $this->assertNotEmpty($build['#cache']);
        $this->assertEquals([
            'tags',
            'contexts',
            'max-age',
        ], array_keys($build['#cache']), 'A view mode with render cache disabled has the correct output (only cache tags, contexts and max-age).');
        // Test that an entity type can opt out of render caching completely.
        $this->installEntitySchema('entity_test_label');
        $entity_test_no_cache = $this->createTestEntity('entity_test_label');
        $entity_test_no_cache->save();
        $build = $this->container
            ->get('entity_type.manager')
            ->getViewBuilder('entity_test_label')
            ->view($entity_test_no_cache, 'full');
        $this->assertNotEmpty($build['#cache']);
        $this->assertEquals([
            'tags',
            'contexts',
            'max-age',
        ], array_keys($build['#cache']), 'An entity type can opt out of render caching regardless of view mode configuration, but always has cache tags, contexts and max-age set.');
    }
    
    /**
     * Tests weighting of display components.
     */
    public function testEntityViewBuilderWeight() {
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = $this->container
            ->get('renderer');
        // Set a weight for the label component.
        \Drupal::service('entity_display.repository')->getViewDisplay('entity_test', 'entity_test', 'full')
            ->setComponent('label', [
            'weight' => 20,
        ])
            ->save();
        // Create and build a test entity.
        $entity_test = $this->createTestEntity('entity_test');
        $view = $this->container
            ->get('entity_type.manager')
            ->getViewBuilder('entity_test')
            ->view($entity_test, 'full');
        $renderer->renderRoot($view);
        // Check that the weight is respected.
        $this->assertEquals(20, $view['label']['#weight'], 'The weight of a display component is respected.');
    }
    
    /**
     * Tests EntityViewBuilder::viewField() language awareness.
     */
    public function testViewField() {
        // Allow access to view translations as well.
        Role::load(RoleInterface::ANONYMOUS_ID)->grantPermission('view test entity translations')
            ->save();
        $this->enableModules([
            'language',
            'content_translation',
        ]);
        $this->installEntitySchema('entity_test_mul');
        $en = ConfigurableLanguage::create([
            'id' => 'en',
        ]);
        $en->save();
        $es = ConfigurableLanguage::create([
            'id' => 'es',
        ]);
        $es->save();
        $this->container
            ->get('content_translation.manager')
            ->setEnabled('entity_test_mul', 'entity_test_mul', TRUE);
        $this->createEntityReferenceField('entity_test_mul', 'entity_test_mul', 'reference_field', 'Reference', 'entity_test_mul');
        // Make the entity reference field non-translatable to confirm it still
        // renders the correct language when displayed as an entity reference.
        $field = FieldConfig::loadByName('entity_test_mul', 'entity_test_mul', 'reference_field');
        $field->set('translatable', FALSE)
            ->save();
        // Create fields and displays for the test entity.
        FieldStorageConfig::create([
            'field_name' => 'text',
            'entity_type' => 'entity_test_mul',
            'type' => 'string',
        ])->save();
        FieldConfig::create([
            'field_name' => 'text',
            'entity_type' => 'entity_test_mul',
            'bundle' => 'entity_test_mul',
            'label' => 'Translated text',
            'translatable' => TRUE,
        ])->save();
        EntityViewMode::create([
            'id' => 'entity_test_mul.full',
            'targetEntityType' => 'entity_test_mul',
            'status' => FALSE,
            'enabled' => TRUE,
            'label' => 'Full',
        ])->save();
        $display = EntityViewDisplay::create([
            'targetEntityType' => 'entity_test_mul',
            'bundle' => 'entity_test_mul',
            'mode' => 'full',
            'label' => 'My view mode',
            'status' => TRUE,
        ])->setComponent('reference_field', [
            'type' => 'entity_reference_entity_view',
            'settings' => [
                'view_mode' => 'full',
            ],
        ])
            ->setComponent('text', [
            'type' => 'string',
            'region' => 'content',
        ]);
        $display->save();
        // Create the entity that will be displayed in the entity reference field
        // of the main entity.
        $referenced_entity = $this->createTestEntity('entity_test_mul');
        $referenced_entity->addTranslation('es', $referenced_entity->getTranslation('en')
            ->toArray());
        $referenced_entity->set('text', 'Text in English');
        $referenced_entity->getTranslation('es')->text = 'Text in Spanish';
        // The entity that will reference $referenced_entity.
        $main_entity = $this->createTestEntity('entity_test_mul');
        $main_entity->addTranslation('es', $main_entity->getTranslation('en')
            ->toArray());
        $main_entity->set('reference_field', $referenced_entity);
        $view_builder = $this->container
            ->get('entity_type.manager')
            ->getViewBuilder('entity_test_mul');
        $renderer = $this->container
            ->get('renderer');
        // Build the view for the reference field and render in English - the site
        // default. Confirm the reference field shows the content of the English
        // translation.
        $reference_field = $main_entity->get('reference_field');
        $reference_field_array_english = $view_builder->viewField($reference_field, 'full');
        $rendered_reference_field_english = $renderer->renderRoot($reference_field_array_english);
        $this->assertStringContainsString('Text in English', (string) $rendered_reference_field_english);
        // Change the default language to Spanish and render the reference
        // field again. It should display the contents of the Spanish translation.
        \Drupal::service('language.default')->set($es);
        \Drupal::languageManager()->reset();
        \Drupal::languageManager()->getCurrentLanguage();
        $reference_field_array_spanish = $view_builder->viewField($reference_field, 'full');
        $rendered_reference_field_spanish = $renderer->renderRoot($reference_field_array_spanish);
        $this->assertStringContainsString('Text in Spanish', (string) $rendered_reference_field_spanish);
    }
    
    /**
     * Creates an entity for testing.
     *
     * @param string $entity_type
     *   The entity type.
     *
     * @return \Drupal\Core\Entity\EntityInterface
     *   The created entity.
     */
    protected function createTestEntity($entity_type) {
        $data = [
            'bundle' => $entity_type,
            'name' => $this->randomMachineName(),
        ];
        return $this->container
            ->get('entity_type.manager')
            ->getStorage($entity_type)
            ->create($data);
    }
    
    /**
     * Tests that viewing an entity without template does not specify #theme.
     */
    public function testNoTemplate() {
        // Ensure that an entity type without explicit view builder uses the
        // default.
        $entity_type_manager = \Drupal::entityTypeManager();
        $entity_type = $entity_type_manager->getDefinition('entity_test_base_field_display');
        $this->assertTrue($entity_type->hasViewBuilderClass());
        $this->assertEquals(EntityViewBuilder::class, $entity_type->getViewBuilderClass());
        // Ensure that an entity without matching template does not have a #theme
        // key.
        $entity = $this->createTestEntity('entity_test');
        $build = $entity_type_manager->getViewBuilder('entity_test')
            ->view($entity);
        $this->assertEquals($entity, $build['#entity_test']);
        $this->assertArrayNotHasKey('#theme', $build);
    }
    
    /**
     * Tests an entity type with an external canonical rel.
     */
    public function testExternalEntity() {
        $this->installEntitySchema('entity_test_external');
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = $this->container
            ->get('renderer');
        $entity_test = $this->createTestEntity('entity_test_external');
        $entity_test->save();
        $view = $this->container
            ->get('entity_type.manager')
            ->getViewBuilder('entity_test_external')
            ->view($entity_test);
        $renderer->renderRoot($view);
        $this->assertArrayNotHasKey('#contextual_links', $view);
    }

}