REST Import

Import and conversion of REST resources into Drupal 8 entities.
Currently, only JSON is supported, further development can include XML and HAL.

The scope of the operations are create, update, delete.

It is based on a mapping defined in in the EntityMapper class that

• maps a source entity (e.g. "news") and a target Drupal 8 entity type and entity id, also known as "bundle" (e.g. "node" and "article").
• defines a converter class, each external entity can be converted into a Drupal entity by defining a class that implements the EntityConverterInterface

The proposed web service definition is based on jsonapi.org.
Further explanations can be found in the json directory.

The import can be triggered by a cron or manually. Each request to import resources are then enqueued via the Queue API.