/**
* Convert a property to a context.
*
* This method will respect the value of contexts as well, so if a context
* object is pass that contains a value, the appropriate value will be
* extracted and injected into the resulting context object if available.
*
* @param string $property_path
* The name of the property.
* @param \Drupal\Core\Plugin\Context\ContextInterface $context
* The context from which we will extract values if available.
*
* @return \Drupal\Core\Plugin\Context\Context
* A context object that represents the definition & value of the property.
* @throws \Exception
*/
public function getContextFromProperty($property_path, ContextInterface $context)
{
$value = NULL;
$data_definition = NULL;
if ($context->hasContextValue()) {
/** @var \Drupal\Core\TypedData\ComplexDataInterface $data */
$data = $context->getContextData();
foreach (explode(':', $property_path) as $name) {
if ($data instanceof ListInterface) {
if (!is_numeric($name)) {
// Implicitly default to delta 0 for lists when not specified.
$data = $data->first();
} else {
// If we have a delta, fetch it and continue with the next part.
$data = $data->get($name);
continue;
}
}
// Forward to the target value if this is a data reference.
if ($data instanceof DataReferenceInterface) {
$data = $data->getTarget();
}
if (!$data->getDataDefinition()->getPropertyDefinition($name)) {
throw new \Exception("Unknown property {$name} in property path {$property_path}");
}
$data = $data->get($name);
}
$value = $data->getValue();
$data_definition = $data instanceof DataReferenceInterface ? $data->getDataDefinition()->getTargetDefinition() : $data->getDataDefinition();
} else {
/** @var \Drupal\Core\TypedData\ComplexDataDefinitionInterface $data_definition */
$data_definition = $context->getContextDefinition()->getDataDefinition();
foreach (explode(':', $property_path) as $name) {
if ($data_definition instanceof ListDataDefinitionInterface) {
$data_definition = $data_definition->getItemDefinition();
// If the delta was specified explicitly, continue with the next part.
if (is_numeric($name)) {
continue;
}
}
// Forward to the target definition if this is a data reference
// definition.
if ($data_definition instanceof DataReferenceDefinitionInterface) {
$data_definition = $data_definition->getTargetDefinition();
}
if (!$data_definition->getPropertyDefinition($name)) {
throw new \Exception("Unknown property {$name} in property path {$property_path}");
}
$data_definition = $data_definition->getPropertyDefinition($name);
}
// Forward to the target definition if this is a data reference
// definition.
if ($data_definition instanceof DataReferenceDefinitionInterface) {
$data_definition = $data_definition->getTargetDefinition();
}
}
$context_definition = new ContextDefinition($data_definition->getDataType(), $data_definition->getLabel(), $data_definition->isRequired(), FALSE, $data_definition->getDescription());
return new Context($context_definition, $value);
}
/**
* Convert a property to a context.
*
* This method will respect the value of contexts as well, so if a context
* object is pass that contains a value, the appropriate value will be
* extracted and injected into the resulting context object if available.
*
* @param string $property_name
* The name of the property.
* @param \Drupal\Core\TypedData\ListDataDefinitionInterface $property
* The property object data definition.
* @param \Drupal\Core\Plugin\Context\ContextInterface $context
* The context from which we will extract values if available.
*
* @return \Drupal\Core\Plugin\Context\Context
* A context object that represents the definition & value of the property.
*/
public function getContextFromProperty($property_name, ListDataDefinitionInterface $property, ContextInterface $context)
{
$value = NULL;
if ($context->hasContextValue()) {
$value = $this->getFirstApplicableTypeResolver($property)->getValueFromProperty($context->getContextValue()->{$property_name});
}
$context_definition = new ContextDefinition($this->getDataTypeFromProperty($property));
return new Context($context_definition, $value);
}
