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- <?php
- namespace Drupal\Component\Plugin;
- use Drupal\Component\Plugin\Context\ContextInterface;
- use Drupal\Component\Plugin\Exception\ContextException;
- use Drupal\Component\Plugin\Context\Context;
- use Symfony\Component\Validator\ConstraintViolationList;
- /**
- * Base class for plugins that are context aware.
- */
- abstract class ContextAwarePluginBase extends PluginBase implements ContextAwarePluginInterface {
- /**
- * The data objects representing the context of this plugin.
- *
- * @var \Drupal\Component\Plugin\Context\ContextInterface[]
- */
- protected $context = [];
- /**
- * Overrides \Drupal\Component\Plugin\PluginBase::__construct().
- *
- * Overrides the construction of context aware plugins to allow for
- * unvalidated constructor based injection of contexts.
- *
- * @param array $configuration
- * The plugin configuration, i.e. an array with configuration values keyed
- * by configuration option name. The special key 'context' may be used to
- * initialize the defined contexts by setting it to an array of context
- * values keyed by context names.
- * @param string $plugin_id
- * The plugin_id for the plugin instance.
- * @param mixed $plugin_definition
- * The plugin implementation definition.
- */
- public function __construct(array $configuration, $plugin_id, $plugin_definition) {
- $context_configuration = isset($configuration['context']) ? $configuration['context'] : [];
- unset($configuration['context']);
- parent::__construct($configuration, $plugin_id, $plugin_definition);
- $this->contexts = $this->createContextFromConfiguration($context_configuration);
- }
- /**
- * Creates context objects from any context mappings in configuration.
- *
- * @param array $context_configuration
- * An associative array of context names and values.
- *
- * @return \Drupal\Component\Plugin\Context\ContextInterface[]
- * An array of context objects.
- */
- protected function createContextFromConfiguration(array $context_configuration) {
- $contexts = [];
- foreach ($context_configuration as $key => $value) {
- $context_definition = $this->getContextDefinition($key);
- $contexts[$key] = new Context($context_definition, $value);
- }
- return $contexts;
- }
- /**
- * {@inheritdoc}
- */
- public function getContextDefinitions() {
- $definition = $this->getPluginDefinition();
- return !empty($definition['context']) ? $definition['context'] : [];
- }
- /**
- * {@inheritdoc}
- */
- public function getContextDefinition($name) {
- $definition = $this->getPluginDefinition();
- if (empty($definition['context'][$name])) {
- throw new ContextException(sprintf("The %s context is not a valid context.", $name));
- }
- return $definition['context'][$name];
- }
- /**
- * {@inheritdoc}
- */
- public function getContexts() {
- // Make sure all context objects are initialized.
- foreach ($this->getContextDefinitions() as $name => $definition) {
- $this->getContext($name);
- }
- return $this->context;
- }
- /**
- * {@inheritdoc}
- */
- public function getContext($name) {
- // Check for a valid context value.
- if (!isset($this->context[$name])) {
- $this->context[$name] = new Context($this->getContextDefinition($name));
- }
- return $this->context[$name];
- }
- /**
- * {@inheritdoc}
- */
- public function setContext($name, ContextInterface $context) {
- $this->context[$name] = $context;
- }
- /**
- * {@inheritdoc}
- */
- public function getContextValues() {
- $values = [];
- foreach ($this->getContextDefinitions() as $name => $definition) {
- $values[$name] = isset($this->context[$name]) ? $this->context[$name]->getContextValue() : NULL;
- }
- return $values;
- }
- /**
- * {@inheritdoc}
- */
- public function getContextValue($name) {
- return $this->getContext($name)->getContextValue();
- }
- /**
- * {@inheritdoc}
- */
- public function setContextValue($name, $value) {
- $this->context[$name] = new Context($this->getContextDefinition($name), $value);
- return $this;
- }
- /**
- * {@inheritdoc}
- */
- public function validateContexts() {
- $violations = new ConstraintViolationList();
- // @todo: Implement symfony validator API to let the validator traverse
- // and set property paths accordingly.
- foreach ($this->getContexts() as $context) {
- $violations->addAll($context->validate());
- }
- return $violations;
- }
- }
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