interface WorkspaceAssociationInterface

interface WorkspaceAssociationInterface {
    
    /**
     * Updates or creates the association for a given entity and a workspace.
     *
     * @param \Drupal\Core\Entity\RevisionableInterface $entity
     *   The entity to update or create from.
     * @param \Drupal\workspaces\WorkspaceInterface $workspace
     *   The workspace in which the entity will be tracked.
     */
    public function trackEntity(RevisionableInterface $entity, WorkspaceInterface $workspace);
    
    /**
     * Responds to the creation of a new workspace entity.
     *
     * @param \Drupal\workspaces\WorkspaceInterface $workspace
     *   The workspaces that was inserted.
     */
    public function workspaceInsert(WorkspaceInterface $workspace);
    
    /**
     * Retrieves the entities tracked by a given workspace.
     *
     * @param string $workspace_id
     *   The ID of the workspace.
     * @param string|null $entity_type_id
     *   (optional) An entity type ID to filter the results by. Defaults to NULL.
     * @param int[]|string[]|null $entity_ids
     *   (optional) An array of entity IDs to filter the results by. Defaults to
     *   NULL.
     *
     * @return array
     *   Returns a multidimensional array where the first level keys are entity
     *   type IDs and the values are an array of entity IDs keyed by revision IDs.
     */
    public function getTrackedEntities($workspace_id, $entity_type_id = NULL, $entity_ids = NULL);
    
    /**
     * Retrieves all content revisions tracked by a given workspace.
     *
     * Since the 'workspace_association' index table only tracks the latest
     * associated revisions, this method retrieves all the tracked revisions by
     * querying the entity type's revision table directly.
     *
     * @param string $workspace_id
     *   The ID of the workspace.
     * @param string $entity_type_id
     *   An entity type ID to find revisions for.
     * @param int[]|string[]|null $entity_ids
     *   (optional) An array of entity IDs to filter the results by. Defaults to
     *   NULL.
     *
     * @return array
     *   Returns an array where the values are an array of entity IDs keyed by
     *   revision IDs.
     */
    public function getAssociatedRevisions($workspace_id, $entity_type_id, $entity_ids = NULL);
    
    /**
     * Gets a list of workspace IDs in which an entity is tracked.
     *
     * @param \Drupal\Core\Entity\RevisionableInterface $entity
     *   An entity object.
     *
     * @return string[]
     *   An array of workspace IDs where the given entity is tracked, or an empty
     *   array if it is not tracked anywhere.
     */
    public function getEntityTrackingWorkspaceIds(RevisionableInterface $entity);
    
    /**
     * Triggers clean-up operations after publishing a workspace.
     *
     * @param \Drupal\workspaces\WorkspaceInterface $workspace
     *   A workspace entity.
     */
    public function postPublish(WorkspaceInterface $workspace);
    
    /**
     * Deletes all the workspace association records for the given workspace.
     *
     * @param string $workspace_id
     *   A workspace entity ID.
     * @param string|null $entity_type_id
     *   (optional) The target entity type of the associations to delete. Defaults
     *   to NULL.
     * @param string|null $entity_ids
     *   (optional) The target entity IDs of the associations to delete. Defaults
     *   to NULL.
     */
    public function deleteAssociations($workspace_id, $entity_type_id = NULL, $entity_ids = NULL);
    
    /**
     * Initializes a workspace with all the associations of its parent.
     *
     * @param \Drupal\workspaces\WorkspaceInterface $workspace
     *   The workspace to be initialized.
     */
    public function initializeWorkspace(WorkspaceInterface $workspace);

}