--- /dev/null
+<?php
+
+namespace Drupal\diff\Controller;
+
+use Drupal\Core\Entity\ContentEntityInterface;
+use Symfony\Component\HttpFoundation\RequestStack;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Drupal\Component\Utility\UrlHelper;
+use Drupal\Core\Entity\EntityStorageInterface;
+use Drupal\Core\Link;
+use Drupal\Core\Routing\RouteMatchInterface;
+use Drupal\Core\Url;
+use Drupal\Core\Controller\ControllerBase;
+use Drupal\diff\DiffLayoutManager;
+use Drupal\diff\DiffEntityComparison;
+
+/**
+ * Base class for controllers that return responses on entity revision routes.
+ */
+class PluginRevisionController extends ControllerBase {
+
+ /**
+ * Wrapper object for writing/reading configuration from diff.plugins.yml.
+ *
+ * @var \Drupal\Core\Config\ImmutableConfig
+ */
+ protected $config;
+
+ /**
+ * The diff entity comparison service.
+ *
+ * @var \Drupal\diff\DiffEntityComparison
+ */
+ protected $entityComparison;
+
+ /**
+ * The field diff layout plugin manager service.
+ *
+ * @var \Drupal\diff\DiffLayoutManager
+ */
+ protected $diffLayoutManager;
+
+ /**
+ * The request stack.
+ *
+ * @var \Symfony\Component\HttpFoundation\RequestStack
+ */
+ protected $requestStack;
+
+ /**
+ * Constructs a PluginRevisionController object.
+ *
+ * @param \Drupal\diff\DiffEntityComparison $entity_comparison
+ * The diff entity comparison service.
+ * @param \Drupal\diff\DiffLayoutManager $diff_layout_manager
+ * The diff layout service.
+ * @param \Symfony\Component\HttpFoundation\RequestStack $request_stack
+ * The request stack.
+ */
+ public function __construct(DiffEntityComparison $entity_comparison, DiffLayoutManager $diff_layout_manager, RequestStack $request_stack) {
+ $this->config = $this->config('diff.settings');
+ $this->diffLayoutManager = $diff_layout_manager;
+ $this->entityComparison = $entity_comparison;
+ $this->requestStack = $request_stack;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container) {
+ return new static(
+ $container->get('diff.entity_comparison'),
+ $container->get('plugin.manager.diff.layout'),
+ $container->get('request_stack')
+ );
+ }
+
+ /**
+ * Get all the revision ids of given entity id.
+ *
+ * @param \Drupal\Core\Entity\EntityStorageInterface $storage
+ * The entity storage manager.
+ * @param int $entity_id
+ * The entity to find revisions of.
+ *
+ * @return int[]
+ * The revision ids.
+ */
+ public function getRevisionIds(EntityStorageInterface $storage, $entity_id) {
+ $result = $storage->getQuery()
+ ->allRevisions()
+ ->condition($storage->getEntityType()->getKey('id'), $entity_id)
+ ->execute();
+ $result_array = array_keys($result);
+ sort($result_array);
+ return $result_array;
+ }
+
+ /**
+ * Returns a table which shows the differences between two entity revisions.
+ *
+ * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
+ * The route match.
+ * @param \Drupal\Core\Entity\ContentEntityInterface $left_revision
+ * The left revision.
+ * @param \Drupal\Core\Entity\ContentEntityInterface $right_revision
+ * The right revision.
+ * @param string $filter
+ * If $filter == 'raw' raw text is compared (including html tags)
+ * If filter == 'raw-plain' markdown function is applied to the text before comparison.
+ *
+ * @return array
+ * Table showing the diff between the two entity revisions.
+ */
+ public function compareEntityRevisions(RouteMatchInterface $route_match, ContentEntityInterface $left_revision, ContentEntityInterface $right_revision, $filter) {
+ $entity_type_id = $left_revision->getEntityTypeId();
+ /** @var \Drupal\Core\Entity\EntityInterface $entity */
+ $entity = $route_match->getParameter($entity_type_id);
+
+ $entity_type_id = $entity->getEntityTypeId();
+ $storage = $this->entityTypeManager()->getStorage($entity_type_id);
+ // Get language from the entity context.
+ $langcode = $entity->language()->getId();
+
+ // Get left and right revision in current language.
+ $left_revision = $left_revision->getTranslation($langcode);
+ $right_revision = $right_revision->getTranslation($langcode);
+
+ $revisions_ids = [];
+ // Filter revisions of current translation and where the translation is
+ // affected.
+ foreach ($this->getRevisionIds($storage, $entity->id()) as $revision_id) {
+ /** @var \Drupal\Core\Entity\ContentEntityInterface $revision */
+ $revision = $storage->loadRevision($revision_id);
+ if ($revision->hasTranslation($langcode) && $revision->getTranslation($langcode)->isRevisionTranslationAffected()) {
+ $revisions_ids[] = $revision_id;
+ }
+ }
+
+ $build = [
+ '#title' => $this->t('Changes to %title', ['%title' => $entity->label()]),
+ 'header' => [
+ '#prefix' => '<header class="diff-header">',
+ '#suffix' => '</header>',
+ ],
+ 'controls' => [
+ '#prefix' => '<div class="diff-controls">',
+ '#suffix' => '</div>',
+ ],
+ ];
+
+ // Build the navigation links.
+ $build['header']['diff_navigation'] = $this->buildRevisionsNavigation($entity, $revisions_ids, $left_revision->getRevisionId(), $right_revision->getRevisionId(), $filter);
+
+ // Build the layout filter.
+ $build['controls']['diff_layout'] = [
+ '#type' => 'item',
+ '#title' => $this->t('Layout'),
+ '#wrapper_attributes' => ['class' => 'diff-controls__item'],
+ 'filter' => $this->buildLayoutNavigation($entity, $left_revision->getRevisionId(), $right_revision->getRevisionId(), $filter),
+ ];
+
+ // Perform comparison only if both entity revisions loaded successfully.
+ if ($left_revision != FALSE && $right_revision != FALSE) {
+ // Build the diff comparison with the plugin.
+ if ($plugin = $this->diffLayoutManager->createInstance($filter)) {
+ $build = array_merge_recursive($build, $plugin->build($left_revision, $right_revision, $entity));
+ $build['diff']['#prefix'] = '<div class="diff-responsive-table-wrapper">';
+ $build['diff']['#suffix'] = '<div>';
+ $build['diff']['#attributes']['class'][] = 'diff-responsive-table';
+ }
+ }
+
+ $build['#attached']['library'][] = 'diff/diff.general';
+ return $build;
+ }
+
+ /**
+ * Builds a navigation dropdown button between the layout plugins.
+ *
+ * @param \Drupal\Core\Entity\ContentEntityInterface $entity
+ * The entity to be compared.
+ * @param int $left_revision_id
+ * Revision id of the left revision.
+ * @param int $right_revision_id
+ * Revision id of the right revision.
+ * @param string $active_filter
+ * The active filter.
+ *
+ * @return array
+ * The layout filter.
+ */
+ protected function buildLayoutNavigation(ContentEntityInterface $entity, $left_revision_id, $right_revision_id, $active_filter) {
+ $links = [];
+ $layouts = $this->diffLayoutManager->getPluginOptions();
+ foreach ($layouts as $key => $value) {
+ $links[$key] = array(
+ 'title' => $value,
+ 'url' => $this->diffRoute($entity, $left_revision_id, $right_revision_id, $key),
+ );
+ }
+
+ // Set as the first element the current filter.
+ $filter = $links[$active_filter];
+ unset($links[$active_filter]);
+ array_unshift($links, $filter);
+
+ $filter = [
+ '#type' => 'operations',
+ '#links' => $links,
+ ];
+
+ return $filter;
+ }
+
+ /**
+ * Creates navigation links between the previous changes and the new ones.
+ *
+ * @param \Drupal\Core\Entity\ContentEntityInterface $entity
+ * The entity to be compared.
+ * @param array $revision_ids
+ * The revision ids.
+ * @param int $left_revision_id
+ * Revision id of the left revision.
+ * @param int $right_revision_id
+ * Revision id of the right revision.
+ * @param string $filter
+ * The filter.
+ *
+ * @return array
+ * The revision navigation links.
+ */
+ protected function buildRevisionsNavigation(ContentEntityInterface $entity, array $revision_ids, $left_revision_id, $right_revision_id, $filter) {
+ $revisions_count = count($revision_ids);
+ $layout_options = &drupal_static(__FUNCTION__);
+ if (!isset($layout_options)) {
+ $layout_options = UrlHelper::filterQueryParameters($this->requestStack->getCurrentRequest()->query->all(), ['page']);
+ }
+ // If there are only 2 revision return an empty row.
+ if ($revisions_count == 2) {
+ return [];
+ }
+ else {
+ $left_link = $right_link = '';
+ $element = [
+ '#type' => 'item',
+ '#title' => $this->t('Navigation'),
+ '#wrapper_attributes' => ['class' => 'diff-navigation'],
+ ];
+ $i = 0;
+ // Find the previous revision.
+ while ($left_revision_id > $revision_ids[$i]) {
+ $i += 1;
+ }
+ if ($i != 0) {
+ // Build the left link.
+ $left_link = Link::fromTextAndUrl($this->t('Previous change'), $this->diffRoute($entity, $revision_ids[$i - 1], $left_revision_id, $filter, $layout_options))->toString();
+ }
+ $element['left'] = [
+ '#type' => 'markup',
+ '#markup' => $left_link,
+ '#prefix' => '<div class="diff-navigation__link prev-link">',
+ '#suffix' => '</div>',
+ ];
+ // Find the next revision.
+ $i = 0;
+ while ($i < $revisions_count && $right_revision_id >= $revision_ids[$i]) {
+ $i += 1;
+ }
+ if ($revisions_count != $i && $revision_ids[$i - 1] != $revision_ids[$revisions_count - 1]) {
+ // Build the right link.
+ $right_link = Link::fromTextAndUrl($this->t('Next change'), $this->diffRoute($entity, $right_revision_id, $revision_ids[$i], $filter, $layout_options))->toString();
+ }
+ $element['right'] = [
+ '#type' => 'markup',
+ '#markup' => $right_link,
+ '#prefix' => '<div class="diff-navigation__link next-link">',
+ '#suffix' => '</div>',
+ ];
+ return $element;
+ }
+ }
+
+ /**
+ * Creates an url object for diff.
+ *
+ * @param \Drupal\Core\Entity\ContentEntityInterface $entity
+ * The entity to be compared.
+ * @param int $left_revision_id
+ * Revision id of the left revision.
+ * @param int $right_revision_id
+ * Revision id of the right revision.
+ * @param string $layout
+ * (optional) The filter/layout added to the route.
+ * @param array $layout_options
+ * (optional) The layout options provided by the selected layout.
+ *
+ * @return \Drupal\Core\Url
+ * The URL object.
+ */
+ public static function diffRoute(ContentEntityInterface $entity, $left_revision_id, $right_revision_id, $layout = NULL, array $layout_options = NULL) {
+ $entity_type_id = $entity->getEntityTypeId();
+ // @todo Remove the diff.revisions_diff route so we avoid adding extra cases.
+ if ($entity->getEntityTypeId() == 'node') {
+ $route_name = 'diff.revisions_diff';
+ }
+ else {
+ $route_name = "entity.$entity_type_id.revisions_diff";
+ }
+ $route_parameters = [
+ $entity_type_id => $entity->id(),
+ 'left_revision' => $left_revision_id,
+ 'right_revision' => $right_revision_id,
+ ];
+ if ($layout) {
+ $route_parameters['filter'] = $layout;
+ }
+ $options = [];
+ if ($layout_options) {
+ $options = [
+ 'query' => $layout_options,
+ ];
+ }
+ return Url::fromRoute($route_name, $route_parameters, $options);
+ }
+
+}
projects / yaffs-website / blobdiff