function WorkspaceMerger::merge

Overrides WorkspaceMergerInterface::merge

File

core/modules/workspaces/src/WorkspaceMerger.php, line 23

Class

WorkspaceMerger

Default implementation of the workspace merger.

Namespace

Code

public function merge() {
    if (!$this->sourceWorkspace
        ->hasParent() || $this->sourceWorkspace->parent->target_id != $this->targetWorkspace
        ->id()) {
        throw new \InvalidArgumentException('The contents of a workspace can only be merged into its parent workspace.');
    }
    if ($this->checkConflictsOnTarget()) {
        throw new WorkspaceConflictException();
    }
    try {
        $transaction = $this->database
            ->startTransaction();
        foreach ($this->getDifferringRevisionIdsOnSource() as $entity_type_id => $revision_difference) {
            $entity_type = $this->entityTypeManager
                ->getDefinition($entity_type_id);
            $revisions_on_source = $this->entityTypeManager
                ->getStorage($entity_type_id)
                ->loadMultipleRevisions(array_keys($revision_difference));
            
            /** @var \Drupal\Core\Entity\ContentEntityInterface $revision */
            foreach ($revisions_on_source as $revision) {
                // Track all the differing revisions from the source workspace in
                // the context of the target workspace. This will automatically
                // update all the descendants of the target workspace as well.
                $this->workspaceAssociation
                    ->trackEntity($revision, $this->targetWorkspace);
                // Set the workspace in which the revision was merged.
                $field_name = $entity_type->getRevisionMetadataKey('workspace');
                $revision->{$field_name}->target_id = $this->targetWorkspace
                    ->id();
                $revision->setSyncing(TRUE);
                $revision->save();
            }
        }
    } catch (\Exception $e) {
        if (isset($transaction)) {
            $transaction->rollBack();
        }
        Error::logException($this->logger, $e);
        throw $e;
    }
}