class NodeRevisionsTest

class NodeRevisionsTest extends NodeTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * An array of node revisions.
     *
     * @var \Drupal\node\NodeInterface[]
     */
    protected $nodes;
    
    /**
     * Revision log messages.
     *
     * @var array
     */
    protected $revisionLogs;
    
    /**
     * {@inheritdoc}
     */
    public static $modules = [
        'node',
        'contextual',
        'datetime',
        'language',
        'content_translation',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() {
        parent::setUp();
        // Enable additional languages.
        ConfigurableLanguage::createFromLangcode('de')->save();
        ConfigurableLanguage::createFromLangcode('it')->save();
        $field_storage_definition = [
            'field_name' => 'untranslatable_string_field',
            'entity_type' => 'node',
            'type' => 'string',
            'cardinality' => 1,
            'translatable' => FALSE,
        ];
        $field_storage = FieldStorageConfig::create($field_storage_definition);
        $field_storage->save();
        $field_definition = [
            'field_storage' => $field_storage,
            'bundle' => 'page',
        ];
        $field = FieldConfig::create($field_definition);
        $field->save();
        // Enable translation for page nodes.
        \Drupal::service('content_translation.manager')->setEnabled('node', 'page', TRUE);
        // Create and log in user.
        $web_user = $this->drupalCreateUser([
            'view page revisions',
            'revert page revisions',
            'delete page revisions',
            'edit any page content',
            'delete any page content',
            'access contextual links',
            'translate any entity',
            'administer content types',
        ]);
        $this->drupalLogin($web_user);
        // Create initial node.
        $node = $this->drupalCreateNode();
        $settings = get_object_vars($node);
        $settings['revision'] = 1;
        $settings['isDefaultRevision'] = TRUE;
        $nodes = [];
        $logs = [];
        // Get original node.
        $nodes[] = clone $node;
        // Create three revisions.
        $revision_count = 3;
        for ($i = 0; $i < $revision_count; $i++) {
            $logs[] = $node->revision_log = $this->randomMachineName(32);
            // Create revision with a random title and body and update variables.
            $node->title = $this->randomMachineName();
            $node->body = [
                'value' => $this->randomMachineName(32),
                'format' => filter_default_format(),
            ];
            $node->untranslatable_string_field->value = $this->randomString();
            $node->setNewRevision();
            // Edit the 1st and 2nd revision with a different user.
            if ($i < 2) {
                $editor = $this->drupalCreateUser();
                $node->setRevisionUserId($editor->id());
            }
            else {
                $node->setRevisionUserId($web_user->id());
            }
            $node->save();
            // Make sure we get revision information.
            $node = Node::load($node->id());
            $nodes[] = clone $node;
        }
        $this->nodes = $nodes;
        $this->revisionLogs = $logs;
    }
    
    /**
     * Checks node revision related operations.
     */
    public function testRevisions() {
        $node_storage = $this->container
            ->get('entity_type.manager')
            ->getStorage('node');
        $nodes = $this->nodes;
        $logs = $this->revisionLogs;
        // Get last node for simple checks.
        $node = $nodes[3];
        // Confirm the correct revision text appears on "view revisions" page.
        $this->drupalGet("node/" . $node->id() . "/revisions/" . $node->getRevisionId() . "/view");
        $this->assertText($node->body->value, 'Correct text displays for version.');
        // Confirm the correct log message appears on "revisions overview" page.
        $this->drupalGet("node/" . $node->id() . "/revisions");
        foreach ($logs as $revision_log) {
            $this->assertText($revision_log, 'Revision log message found.');
        }
        // Original author, and editor names should appear on revisions overview.
        $web_user = $nodes[0]->revision_uid->entity;
        $this->assertText(t('by @name', [
            '@name' => $web_user->getAccountName(),
        ]));
        $editor = $nodes[2]->revision_uid->entity;
        $this->assertText(t('by @name', [
            '@name' => $editor->getAccountName(),
        ]));
        // Confirm that this is the default revision.
        $this->assertTrue($node->isDefaultRevision(), 'Third node revision is the default one.');
        // Confirm that revisions revert properly.
        $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[1]->getRevisionid() . "/revert", [], t('Revert'));
        $this->assertRaw(t('@type %title has been reverted to the revision from %revision-date.', [
            '@type' => 'Basic page',
            '%title' => $nodes[1]->label(),
            '%revision-date' => $this->container
                ->get('date.formatter')
                ->format($nodes[1]->getRevisionCreationTime()),
        ]), 'Revision reverted.');
        $node_storage->resetCache([
            $node->id(),
        ]);
        $reverted_node = $node_storage->load($node->id());
        $this->assertTrue($nodes[1]->body->value == $reverted_node->body->value, 'Node reverted correctly.');
        // Confirm the revision author is the user performing the revert.
        $this->assertTrue($reverted_node->getRevisionUserId() == $this->loggedInUser
            ->id(), 'Node revision author is user performing revert.');
        // And that its not the revision author.
        $this->assertTrue($reverted_node->getRevisionUserId() != $nodes[1]->getRevisionUserId(), 'Node revision author is not original revision author.');
        // Confirm that this is not the default version.
        $node = node_revision_load($node->getRevisionId());
        $this->assertFalse($node->isDefaultRevision(), 'Third node revision is not the default one.');
        // Confirm revisions delete properly.
        $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[1]->getRevisionId() . "/delete", [], t('Delete'));
        $this->assertRaw(t('Revision from %revision-date of @type %title has been deleted.', [
            '%revision-date' => $this->container
                ->get('date.formatter')
                ->format($nodes[1]->getRevisionCreationTime()),
            '@type' => 'Basic page',
            '%title' => $nodes[1]->label(),
        ]), 'Revision deleted.');
        $connection = Database::getConnection();
        $nids = \Drupal::entityQuery('node')->accessCheck(FALSE)
            ->allRevisions()
            ->condition('nid', $node->id())
            ->condition('vid', $nodes[1]->getRevisionId())
            ->execute();
        $this->assertCount(0, $nids);
        // Set the revision timestamp to an older date to make sure that the
        // confirmation message correctly displays the stored revision date.
        $old_revision_date = REQUEST_TIME - 86400;
        $connection->update('node_revision')
            ->condition('vid', $nodes[2]->getRevisionId())
            ->fields([
            'revision_timestamp' => $old_revision_date,
        ])
            ->execute();
        $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[2]->getRevisionId() . "/revert", [], t('Revert'));
        $this->assertRaw(t('@type %title has been reverted to the revision from %revision-date.', [
            '@type' => 'Basic page',
            '%title' => $nodes[2]->label(),
            '%revision-date' => $this->container
                ->get('date.formatter')
                ->format($old_revision_date),
        ]));
        // Make a new revision and set it to not be default.
        // This will create a new revision that is not "front facing".
        $new_node_revision = clone $node;
        $new_body = $this->randomMachineName();
        $new_node_revision->body->value = $new_body;
        // Save this as a non-default revision.
        $new_node_revision->setNewRevision();
        $new_node_revision->isDefaultRevision = FALSE;
        $new_node_revision->save();
        $this->drupalGet('node/' . $node->id());
        $this->assertNoText($new_body, 'Revision body text is not present on default version of node.');
        // Verify that the new body text is present on the revision.
        $this->drupalGet("node/" . $node->id() . "/revisions/" . $new_node_revision->getRevisionId() . "/view");
        $this->assertText($new_body, 'Revision body text is present when loading specific revision.');
        // Verify that the non-default revision vid is greater than the default
        // revision vid.
        $default_revision = $connection->select('node', 'n')
            ->fields('n', [
            'vid',
        ])
            ->condition('nid', $node->id())
            ->execute()
            ->fetchCol();
        $default_revision_vid = $default_revision[0];
        $this->assertTrue($new_node_revision->getRevisionId() > $default_revision_vid, 'Revision vid is greater than default revision vid.');
        // Create an 'EN' node with a revision log message.
        $node = $this->drupalCreateNode();
        $node->title = 'Node title in EN';
        $node->revision_log = 'Simple revision message (EN)';
        $node->save();
        $this->drupalGet("node/" . $node->id() . "/revisions");
        // Verify revisions is accessible since the type has revisions enabled.
        $this->assertSession()
            ->statusCodeEquals(200);
        // Check initial revision is shown on the node revisions overview page.
        $this->assertText('Simple revision message (EN)');
        // Verify that delete operation is inaccessible for the default revision.
        $this->drupalGet("node/" . $node->id() . "/revisions/" . $node->getRevisionId() . "/delete");
        $this->assertSession()
            ->statusCodeEquals(403);
        // Verify that revert operation is inaccessible for the default revision.
        $this->drupalGet("node/" . $node->id() . "/revisions/" . $node->getRevisionId() . "/revert");
        $this->assertSession()
            ->statusCodeEquals(403);
        // Create a new revision and new log message.
        $node = Node::load($node->id());
        $node->body->value = 'New text (EN)';
        $node->revision_log = 'New revision message (EN)';
        $node->setNewRevision();
        $node->save();
        // Check both revisions are shown on the node revisions overview page.
        $this->drupalGet("node/" . $node->id() . "/revisions");
        $this->assertText('Simple revision message (EN)');
        $this->assertText('New revision message (EN)');
        // Create an 'EN' node with a revision log message.
        $node = $this->drupalCreateNode();
        $node->langcode = 'en';
        $node->title = 'Node title in EN';
        $node->revision_log = 'Simple revision message (EN)';
        $node->save();
        $this->drupalGet("node/" . $node->id() . "/revisions");
        // Verify revisions is accessible since the type has revisions enabled.
        $this->assertSession()
            ->statusCodeEquals(200);
        // Check initial revision is shown on the node revisions overview page.
        $this->assertText('Simple revision message (EN)');
        // Add a translation in 'DE' and create a new revision and new log message.
        $translation = $node->addTranslation('de');
        $translation->title->value = 'Node title in DE';
        $translation->body->value = 'New text (DE)';
        $translation->revision_log = 'New revision message (DE)';
        $translation->setNewRevision();
        $translation->save();
        // View the revision UI in 'IT', only the original node revision is shown.
        $this->drupalGet("it/node/" . $node->id() . "/revisions");
        $this->assertText('Simple revision message (EN)');
        $this->assertNoText('New revision message (DE)');
        // View the revision UI in 'DE', only the translated node revision is shown.
        $this->drupalGet("de/node/" . $node->id() . "/revisions");
        $this->assertNoText('Simple revision message (EN)');
        $this->assertText('New revision message (DE)');
        // View the revision UI in 'EN', only the original node revision is shown.
        $this->drupalGet("node/" . $node->id() . "/revisions");
        $this->assertText('Simple revision message (EN)');
        $this->assertNoText('New revision message (DE)');
    }
    
    /**
     * Checks that revisions are correctly saved without log messages.
     */
    public function testNodeRevisionWithoutLogMessage() {
        $node_storage = $this->container
            ->get('entity_type.manager')
            ->getStorage('node');
        // Create a node with an initial log message.
        $revision_log = $this->randomMachineName(10);
        $node = $this->drupalCreateNode([
            'revision_log' => $revision_log,
        ]);
        // Save over the same revision and explicitly provide an empty log message
        // (for example, to mimic the case of a node form submitted with no text in
        // the "log message" field), and check that the original log message is
        // preserved.
        $new_title = $this->randomMachineName(10) . 'testNodeRevisionWithoutLogMessage1';
        $node = clone $node;
        $node->title = $new_title;
        $node->revision_log = '';
        $node->setNewRevision(FALSE);
        $node->save();
        $this->drupalGet('node/' . $node->id());
        $this->assertText($new_title, 'New node title appears on the page.');
        $node_storage->resetCache([
            $node->id(),
        ]);
        $node_revision = $node_storage->load($node->id());
        $this->assertEqual($node_revision->revision_log->value, $revision_log, 'After an existing node revision is re-saved without a log message, the original log message is preserved.');
        // Create another node with an initial revision log message.
        $node = $this->drupalCreateNode([
            'revision_log' => $revision_log,
        ]);
        // Save a new node revision without providing a log message, and check that
        // this revision has an empty log message.
        $new_title = $this->randomMachineName(10) . 'testNodeRevisionWithoutLogMessage2';
        $node = clone $node;
        $node->title = $new_title;
        $node->setNewRevision();
        $node->revision_log = NULL;
        $node->save();
        $this->drupalGet('node/' . $node->id());
        $this->assertText($new_title, 'New node title appears on the page.');
        $node_storage->resetCache([
            $node->id(),
        ]);
        $node_revision = $node_storage->load($node->id());
        $this->assertTrue(empty($node_revision->revision_log->value), 'After a new node revision is saved with an empty log message, the log message for the node is empty.');
    }
    
    /**
     * Gets server-rendered contextual links for the given contextual links IDs.
     *
     * @param string[] $ids
     *   An array of contextual link IDs.
     * @param string $current_path
     *   The Drupal path for the page for which the contextual links are rendered.
     *
     * @return string
     *   The decoded JSON response body.
     */
    protected function renderContextualLinks(array $ids, $current_path) {
        $post = [];
        for ($i = 0; $i < count($ids); $i++) {
            $post['ids[' . $i . ']'] = $ids[$i];
        }
        $response = $this->drupalPost('contextual/render', 'application/json', $post, [
            'query' => [
                'destination' => $current_path,
            ],
        ]);
        return Json::decode($response);
    }
    
    /**
     * Tests the revision translations are correctly reverted.
     */
    public function testRevisionTranslationRevert() {
        // Create a node and a few revisions.
        $node = $this->drupalCreateNode([
            'langcode' => 'en',
        ]);
        $initial_revision_id = $node->getRevisionId();
        $initial_title = $node->label();
        $this->createRevisions($node, 2);
        // Translate the node and create a few translation revisions.
        $translation = $node->addTranslation('it');
        $this->createRevisions($translation, 3);
        $revert_id = $node->getRevisionId();
        $translated_title = $translation->label();
        $untranslatable_string = $node->untranslatable_string_field->value;
        // Create a new revision for the default translation in-between a series of
        // translation revisions.
        $this->createRevisions($node, 1);
        $default_translation_title = $node->label();
        // And create a few more translation revisions.
        $this->createRevisions($translation, 2);
        $translation_revision_id = $translation->getRevisionId();
        // Now revert the a translation revision preceding the last default
        // translation revision, and check that the desired value was reverted but
        // the default translation value was preserved.
        $revert_translation_url = Url::fromRoute('node.revision_revert_translation_confirm', [
            'node' => $node->id(),
            'node_revision' => $revert_id,
            'langcode' => 'it',
        ]);
        $this->drupalPostForm($revert_translation_url, [], t('Revert'));
        
        /** @var \Drupal\node\NodeStorage $node_storage */
        $node_storage = $this->container
            ->get('entity_type.manager')
            ->getStorage('node');
        $node_storage->resetCache();
        
        /** @var \Drupal\node\NodeInterface $node */
        $node = $node_storage->load($node->id());
        $this->assertTrue($node->getRevisionId() > $translation_revision_id);
        $this->assertEqual($node->label(), $default_translation_title);
        $this->assertEqual($node->getTranslation('it')
            ->label(), $translated_title);
        $this->assertNotEqual($node->untranslatable_string_field->value, $untranslatable_string);
        $latest_revision_id = $translation->getRevisionId();
        // Now revert the a translation revision preceding the last default
        // translation revision again, and check that the desired value was reverted
        // but the default translation value was preserved. But in addition the
        // untranslated field will be reverted as well.
        $this->drupalPostForm($revert_translation_url, [
            'revert_untranslated_fields' => TRUE,
        ], t('Revert'));
        $node_storage->resetCache();
        
        /** @var \Drupal\node\NodeInterface $node */
        $node = $node_storage->load($node->id());
        $this->assertTrue($node->getRevisionId() > $latest_revision_id);
        $this->assertEqual($node->label(), $default_translation_title);
        $this->assertEqual($node->getTranslation('it')
            ->label(), $translated_title);
        $this->assertEqual($node->untranslatable_string_field->value, $untranslatable_string);
        $latest_revision_id = $translation->getRevisionId();
        // Now revert the entity revision to the initial one where the translation
        // didn't exist.
        $revert_url = Url::fromRoute('node.revision_revert_confirm', [
            'node' => $node->id(),
            'node_revision' => $initial_revision_id,
        ]);
        $this->drupalPostForm($revert_url, [], t('Revert'));
        $node_storage->resetCache();
        
        /** @var \Drupal\node\NodeInterface $node */
        $node = $node_storage->load($node->id());
        $this->assertTrue($node->getRevisionId() > $latest_revision_id);
        $this->assertEqual($node->label(), $initial_title);
        $this->assertFalse($node->hasTranslation('it'));
    }
    
    /**
     * Creates a series of revisions for the specified node.
     *
     * @param \Drupal\node\NodeInterface $node
     *   The node object.
     * @param $count
     *   The number of revisions to be created.
     */
    protected function createRevisions(NodeInterface $node, $count) {
        for ($i = 0; $i < $count; $i++) {
            $node->title = $this->randomString();
            $node->untranslatable_string_field->value = $this->randomString();
            $node->setNewRevision(TRUE);
            $node->save();
        }
    }

}