<?php

namespace Drupal\Core\TypedData;

use Drupal\Component\Plugin\PluginManagerInterface;
use Drupal\Component\Plugin\Discovery\CachedDiscoveryInterface;
use Drupal\Core\Validation\ConstraintManager;
use Symfony\Component\Validator\Validator\ValidatorInterface;

/**
 * Defines an interface for typed data manager.
 */
interface TypedDataManagerInterface extends PluginManagerInterface, CachedDiscoveryInterface {

  /**
   * Instantiates a typed data object.
   *
   * @param string $data_type
   *   The data type, for which a typed object should be instantiated.
   * @param array $configuration
   *   The plugin configuration array, i.e. an array with the following keys:
   *   - data_definition: The data definition object, i.e. an instance of
   *     \Drupal\Core\TypedData\DataDefinitionInterface.
   *   - name: The name of the property or the delta of the list item if a
   *     property or list item is to be created. Otherwise, this should be set
   *     to NULL, but the key must be specified.
   *   - parent: The parent typed data object implementing either the
   *     ListInterface or the ComplexDataInterface if a property or list item is
   *     to be created. Otherwise, this should be set to NULL, but the key must
   *     be specified.
   *
   * @return \Drupal\Core\TypedData\TypedDataInterface
   *   The instantiated typed data object.
   *
   * @see \Drupal\Core\TypedData\TypedDataManager::create()
   */
  public function createInstance($data_type, array $configuration = array());

  /**
   * Creates a new typed data object instance.
   *
   * @param \Drupal\Core\TypedData\DataDefinitionInterface $definition
   *   The data definition of the typed data object. For backwards-compatibility
   *   an array representation of the data definition may be passed also.
   * @param mixed $value
   *   (optional) The data value. If set, it has to match one of the supported
   *   data type format as documented for the data type classes.
   * @param string $name
   *   (optional) If a property or list item is to be created, the name of the
   *   property or the delta of the list item.
   * @param mixed $parent
   *   (optional) If a property or list item is to be created, the parent typed
   *   data object implementing either the ListInterface or the
   *   ComplexDataInterface.
   *
   * @return \Drupal\Core\TypedData\TypedDataInterface
   *   The instantiated typed data object.
   *
   * @see \Drupal\Core\TypedData\TypedDataManager::getPropertyInstance()
   * @see \Drupal\Core\TypedData\Plugin\DataType\BinaryData
   * @see \Drupal\Core\TypedData\Plugin\DataType\BooleanData
   * @see \Drupal\Core\TypedData\Plugin\DataType\Date
   * @see \Drupal\Core\TypedData\Plugin\DataType\Duration
   * @see \Drupal\Core\TypedData\Plugin\DataType\FloatData
   * @see \Drupal\Core\TypedData\Plugin\DataType\IntegerData
   * @see \Drupal\Core\TypedData\Plugin\DataType\StringData
   * @see \Drupal\Core\TypedData\Plugin\DataType\Uri
   */
  public function create(DataDefinitionInterface $definition, $value = NULL, $name = NULL, $parent = NULL);

  /**
   * Creates a new data definition object.
   *
   * While data definitions objects may be created directly if the definition
   * class used by a data type is known, this method allows the creation of data
   * definitions for any given data type.
   *
   * For example, if a definition for a map is to be created, the following code
   * could be used instead of calling this method with the argument 'map':
   * @code
   *   $map_definition = \Drupal\Core\TypedData\MapDataDefinition::create();
   * @endcode
   *
   * @param string $data_type
   *   The data type plugin ID, for which a data definition object should be
   *   created.
   *
   * @return \Drupal\Core\TypedData\DataDefinitionInterface
   *   A data definition object for the given data type. The class of this
   *   object is provided by the definition_class in the plugin annotation.
   *
   * @see \Drupal\Core\TypedData\TypedDataManager::createListDataDefinition()
   */
  public function createDataDefinition($data_type);

  /**
   * Creates a new list data definition for items of the given data type.
   *
   * @param string $item_type
   *   The item type, for which a list data definition should be created.
   *
   * @return \Drupal\Core\TypedData\ListDataDefinitionInterface
   *   A list definition for items of the given data type.
   *
   * @see \Drupal\Core\TypedData\TypedDataManager::createDataDefinition()
   */
  public function createListDataDefinition($item_type);

  /**
   * {@inheritdoc}
   *
   * @param array $options
   *   An array of options with the following keys:
   *   - object: The parent typed data object, implementing the
   *     TypedDataInterface and either the ListInterface or the
   *     ComplexDataInterface.
   *   - property: The name of the property to instantiate, or the delta of the
   *     the list item to instantiate.
   *   - value: The value to set. If set, it has to match one of the supported
   *     data type formats as documented by the data type classes.
   *
   * @return \Drupal\Core\TypedData\TypedDataInterface
   *   The new property instance.
   *
   * @throws \InvalidArgumentException
   *   If the given property is not known, or the passed object does not
   *   implement the ListInterface or the ComplexDataInterface.
   *
   * @see \Drupal\Core\TypedData\TypedDataManager::getPropertyInstance()
   */
  public function getInstance(array $options);

  /**
   * Get a typed data instance for a property of a given typed data object.
   *
   * This method will use prototyping for fast and efficient instantiation of
   * many property objects with the same property path; for example,
   * when multiple comments are used comment_body.0.value needs to be
   * instantiated very often.
   *
   * Prototyping is done by the root object's data type and the given
   * property path, i.e. all property instances having the same property path
   * and inheriting from the same data type are prototyped.
   *
   * @param \Drupal\Core\TypedData\TypedDataInterface $object
   *   The parent typed data object, implementing the TypedDataInterface and
   *   either the ListInterface or the ComplexDataInterface.
   * @param string $property_name
   *   The name of the property to instantiate, or the delta of an list item.
   * @param mixed $value
   *   (optional) The data value. If set, it has to match one of the supported
   *   data type formats as documented by the data type classes.
   *
   * @return \Drupal\Core\TypedData\TypedDataInterface
   *   The new property instance.
   *
   * @throws \InvalidArgumentException
   *   If the given property is not known, or the passed object does not
   *   implement the ListInterface or the ComplexDataInterface.
   *
   * @see \Drupal\Core\TypedData\TypedDataManager::create()
   */
  public function getPropertyInstance(TypedDataInterface $object, $property_name, $value = NULL);

  /**
   * Gets the validator for validating typed data.
   *
   * @return \Symfony\Component\Validator\Validator\ValidatorInterface
   *   The validator object.
   */
  public function getValidator();

  /**
   * Sets the validator for validating typed data.
   *
   * @param \Symfony\Component\Validator\Validator\ValidatorInterface $validator
   *   The validator object to set.
   */
  public function setValidator(ValidatorInterface $validator);

  /**
   * Gets the validation constraint manager.
   *
   * @return \Drupal\Core\Validation\ConstraintManager
   *   The constraint manager.
   */
  public function getValidationConstraintManager();

  /**
   * Sets the validation constraint manager.
   *
   * The validation constraint manager is used to instantiate validation
   * constraint plugins.
   *
   * @param \Drupal\Core\Validation\ConstraintManager $constraintManager
   *   The constraint manager to set.
   */
  public function setValidationConstraintManager(ConstraintManager $constraintManager);

  /**
   * Gets default constraints for the given data definition.
   *
   * This generates default constraint definitions based on the data definition;
   * for example, a NotNull constraint is generated if the data is defined as
   * required. Besides that, any constraints defined for the data type (that is,
   * below the 'constraint' key of the type's plugin definition) are taken into
   * account.
   *
   * @param \Drupal\Core\TypedData\DataDefinitionInterface $definition
   *   A data definition.
   *
   * @return array
   *   An array of validation constraint definitions, keyed by constraint name.
   *   Each constraint definition can be used for instantiating
   *   \Symfony\Component\Validator\Constraint objects.
   */
  public function getDefaultConstraints(DataDefinitionInterface $definition);

  /**
   * Gets the canonical representation of a TypedData object.
   *
   * The canonical representation is typically used when data is passed on to
   * other code components. In many use cases, the TypedData object is mostly
   * unified adapter wrapping a primary value (a string, an entity, etc.) which
   * is the canonical representation that consuming code like constraint
   * validators are really interested in. For some APIs, though, the domain
   * object (for example, Field API's FieldItem and FieldItemList) directly
   * implements TypedDataInterface, and the canonical representation is thus the
   * data object itself.
   *
   * When a TypedData object gets validated, for example, its canonical
   * representation is passed on to constraint validators, which thus receive
   * an Entity unwrapped, but a FieldItem as is.
   *
   * Data types specify whether their data objects need unwrapping by using the
   * 'unwrap_for_canonical_representation' property in the data definition
   * (defaults to TRUE).
   *
   * @param \Drupal\Core\TypedData\TypedDataInterface $data
   *   The data.
   *
   * @return mixed
   *   The canonical representation of the passed data.
   */
  public function getCanonicalRepresentation(TypedDataInterface $data);

}
