class JsonApiFunctionalTestBase

abstract class JsonApiFunctionalTestBase extends BrowserTestBase {
    use EntityReferenceTestTrait;
    use ImageFieldCreationTrait;
    const IS_MULTILINGUAL = TRUE;
    const IS_NOT_MULTILINGUAL = FALSE;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'jsonapi',
        'serialization',
        'node',
        'image',
        'taxonomy',
        'link',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Test user.
     *
     * @var \Drupal\user\Entity\User
     */
    protected $user;
    
    /**
     * Test user with access to view profiles.
     *
     * @var \Drupal\user\Entity\User
     */
    protected $userCanViewProfiles;
    
    /**
     * Test nodes.
     *
     * @var \Drupal\node\Entity\Node[]
     */
    protected $nodes = [];
    
    /**
     * Test taxonomy terms.
     *
     * @var \Drupal\taxonomy\Entity\Term[]
     */
    protected $tags = [];
    
    /**
     * Test files.
     *
     * @var \Drupal\file\Entity\File[]
     */
    protected $files = [];
    
    /**
     * The HTTP client.
     *
     * @var \GuzzleHttp\ClientInterface
     */
    protected $httpClient;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() {
        parent::setUp();
        // Set up a HTTP client that accepts relative URLs.
        $this->httpClient = $this->container
            ->get('http_client_factory')
            ->fromOptions([
            'base_uri' => $this->baseUrl,
        ]);
        // Create Basic page and Article node types.
        if ($this->profile != 'standard') {
            $this->drupalCreateContentType([
                'type' => 'article',
                'name' => 'Article',
            ]);
            // Setup vocabulary.
            Vocabulary::create([
                'vid' => 'tags',
                'name' => 'Tags',
            ])->save();
            // Add tags and field_image to the article.
            $this->createEntityReferenceField('node', 'article', 'field_tags', 'Tags', 'taxonomy_term', 'default', [
                'target_bundles' => [
                    'tags' => 'tags',
                ],
                'auto_create' => TRUE,
            ], FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
            $this->createImageField('field_image', 'article');
            $this->createImageField('field_heroless', 'article');
        }
        FieldStorageConfig::create([
            'field_name' => 'field_link',
            'entity_type' => 'node',
            'type' => 'link',
            'settings' => [],
            'cardinality' => 1,
        ])->save();
        $field_config = FieldConfig::create([
            'field_name' => 'field_link',
            'label' => 'Link',
            'entity_type' => 'node',
            'bundle' => 'article',
            'required' => FALSE,
            'settings' => [],
            'description' => '',
        ]);
        $field_config->save();
        // Field for testing sorting.
        FieldStorageConfig::create([
            'field_name' => 'field_sort1',
            'entity_type' => 'node',
            'type' => 'integer',
        ])->save();
        FieldConfig::create([
            'field_name' => 'field_sort1',
            'entity_type' => 'node',
            'bundle' => 'article',
        ])->save();
        // Another field for testing sorting.
        FieldStorageConfig::create([
            'field_name' => 'field_sort2',
            'entity_type' => 'node',
            'type' => 'integer',
        ])->save();
        FieldConfig::create([
            'field_name' => 'field_sort2',
            'entity_type' => 'node',
            'bundle' => 'article',
        ])->save();
        $this->user = $this->drupalCreateUser([
            'create article content',
            'edit any article content',
            'delete any article content',
        ]);
        // Create a user that can.
        $this->userCanViewProfiles = $this->drupalCreateUser([
            'access user profiles',
        ]);
        $this->grantPermissions(Role::load(RoleInterface::ANONYMOUS_ID), [
            'access user profiles',
            'administer taxonomy',
        ]);
        \Drupal::service('router.builder')->rebuild();
    }
    
    /**
     * Performs a HTTP request. Wraps the Guzzle HTTP client.
     *
     * Why wrap the Guzzle HTTP client? Because any error response is returned via
     * an exception, which would make the tests unnecessarily complex to read.
     *
     * @param string $method
     *   HTTP method.
     * @param \Drupal\Core\Url $url
     *   URL to request.
     * @param array $request_options
     *   Request options to apply.
     *
     * @return \Psr\Http\Message\ResponseInterface
     *   The request response.
     *
     * @throws \GuzzleHttp\Exception\GuzzleException
     *
     * @see \GuzzleHttp\ClientInterface::request
     */
    protected function request($method, Url $url, array $request_options) {
        try {
            $response = $this->httpClient
                ->request($method, $url->toString(), $request_options);
        } catch (ClientException $e) {
            $response = $e->getResponse();
        } catch (ServerException $e) {
            $response = $e->getResponse();
        }
        return $response;
    }
    
    /**
     * Creates default content to test the API.
     *
     * @param int $num_articles
     *   Number of articles to create.
     * @param int $num_tags
     *   Number of tags to create.
     * @param bool $article_has_image
     *   Set to TRUE if you want to add an image to the generated articles.
     * @param bool $article_has_link
     *   Set to TRUE if you want to add a link to the generated articles.
     * @param bool $is_multilingual
     *   (optional) Set to TRUE if you want to enable multilingual content.
     * @param bool $referencing_twice
     *   (optional) Set to TRUE if you want articles to reference the same tag
     *   twice.
     */
    protected function createDefaultContent($num_articles, $num_tags, $article_has_image, $article_has_link, $is_multilingual, $referencing_twice = FALSE) {
        $random = $this->getRandomGenerator();
        for ($created_tags = 0; $created_tags < $num_tags; $created_tags++) {
            $term = Term::create([
                'vid' => 'tags',
                'name' => $random->name(),
            ]);
            if ($is_multilingual) {
                $term->addTranslation('ca', [
                    'name' => $term->getName() . ' (ca)',
                ]);
            }
            $term->save();
            $this->tags[] = $term;
        }
        for ($created_nodes = 0; $created_nodes < $num_articles; $created_nodes++) {
            $values = [
                'uid' => [
                    'target_id' => $this->user
                        ->id(),
                ],
                'type' => 'article',
            ];
            if ($referencing_twice) {
                $values['field_tags'] = [
                    [
                        'target_id' => 1,
                    ],
                    [
                        'target_id' => 1,
                    ],
                ];
            }
            else {
                // Get N random tags.
                $selected_tags = mt_rand(1, $num_tags);
                $tags = [];
                while (count($tags) < $selected_tags) {
                    $tags[] = mt_rand(1, $num_tags);
                    $tags = array_unique($tags);
                }
                $values['field_tags'] = array_map(function ($tag) {
                    return [
                        'target_id' => $tag,
                    ];
                }, $tags);
            }
            if ($article_has_image) {
                $file = File::create([
                    'uri' => 'public://' . $random->name() . '.png',
                ]);
                $file->setPermanent();
                $file->save();
                $this->files[] = $file;
                $values['field_image'] = [
                    'target_id' => $file->id(),
                    'alt' => 'alt text',
                ];
            }
            if ($article_has_link) {
                $values['field_link'] = [
                    'title' => $this->getRandomGenerator()
                        ->name(),
                    'uri' => sprintf('%s://%s.%s', 'http' . (mt_rand(0, 2) > 1 ? '' : 's'), $this->getRandomGenerator()
                        ->name(), 'org'),
                ];
            }
            // Create values for the sort fields, to allow for testing complex
            // sorting:
            // - field_sort1 increments every 5 articles, starting at zero
            // - field_sort2 decreases every article, ending at zero.
            $values['field_sort1'] = [
                'value' => floor($created_nodes / 5),
            ];
            $values['field_sort2'] = [
                'value' => $num_articles - $created_nodes,
            ];
            $node = $this->createNode($values);
            if ($is_multilingual === static::IS_MULTILINGUAL) {
                $values['title'] = $node->getTitle() . ' (ca)';
                $values['field_image']['alt'] = 'alt text (ca)';
                $node->addTranslation('ca', $values);
            }
            $node->save();
            $this->nodes[] = $node;
        }
        if ($article_has_link) {
            // Make sure that there is at least 1 https link for ::testRead() #19.
            $this->nodes[0]->field_link = [
                'title' => 'Drupal',
                'uri' => 'https://drupal.org',
            ];
            $this->nodes[0]
                ->save();
        }
    }

}