/**
* Given a relationship, gets the stub entity for the source.
*
* @param array $relationship The relationship array.
*
* @return bool|mixed Either the stub entity or false on error.
*/
protected function getSourceStubEntity(array $relationship)
{
$field_name = $relationship['field_name'];
$source_entity_ids = entity_get_id_by_uuid($relationship['source_type'], array($relationship['source_uuid']));
$source_entity_id = count($source_entity_ids) > 0 ? reset($source_entity_ids) : null;
$source_entity_vids = entity_get_id_by_uuid($relationship['source_type'], array($relationship['source_vuuid']), true);
$source_entity_vid = count($source_entity_vids) > 0 ? reset($source_entity_vids) : false;
if (!$source_entity_id) {
return false;
}
// Get the bundle for the source entity.
$source_entity_bundle = Entity::getBundleFromID($relationship['source_type'], $source_entity_id);
if (!$source_entity_bundle) {
return false;
}
// Get the stub entity for the source.
$source_stub = Entity::getStub($relationship['source_type'], $source_entity_id, $source_entity_bundle, $source_entity_vid);
// Load the existing field onto the entity.
$field_instance_info = field_info_instance($relationship['source_type'], $field_name, $source_entity_bundle);
if ($field_instance_info === false) {
return false;
}
try {
// First, load the revisions.
field_attach_load_revision($relationship['source_type'], array($source_entity_id => $source_stub), array('field_id' => $field_instance_info['field_id']));
// Second, get the original deltas for the revision.
$deltas = db_select('field_revision_' . $field_name, 'fr')->fields('fr', array('language', 'delta'))->condition($source_entity_vid ? 'revision_id' : 'entity_id', $source_entity_vid ? $source_entity_vid : $source_entity_id)->condition('language', field_available_languages($relationship['source_type'], $field_instance_info), 'IN')->orderBy('delta')->execute();
// Assign the deltas to their languages.
$deltas_languages = array();
foreach ($deltas as $delta) {
if (!array_key_exists($delta->language, $deltas_languages)) {
$deltas_languages[$delta->language] = array();
}
$deltas_languages[$delta->language][] = $delta->delta;
}
// Reset the deltas to their correct orders.
$field_value =& $source_stub->{$field_name};
foreach ($deltas_languages as $language => $deltas) {
$new_value = array();
for ($i = 0; $i < count($field_value[$language]); $i++) {
$new_value[$deltas[$i]] = $field_value[$language][$i];
}
$field_value[$language] = $new_value;
}
} catch (\Exception $ex) {
// If an exception was thrown, that probably means the field doesn't
// exist, so we should return false.
return false;
}
return $source_stub;
}
