<?php

/**

 * Blocks API: WP_Block_Patterns_Registry class

 *

 * @package WordPress

 * @subpackage Blocks

 * @since 5.5.0

 */

/**

 * Class used for interacting with patterns.

 *

 * @since 5.5.0

 */

final class WP_Block_Patterns_Registry {

	/**

	 * Registered patterns array.

	 *

	 * @var array

	 */

	private $registered_patterns = array();

	/**

	 * Container for the main instance of the class.

	 *

	 * @var WP_Block_Patterns_Registry|null

	 */

	private static $instance = null;

	/**

	 * Registers a pattern.

	 *

	 * @since 5.5.0

	 *

	 * @param string $pattern_name       Pattern name including namespace.

	 * @param array  $pattern_properties Array containing the properties of the pattern: title,

	 *                                   content, description, viewportWidth, categories, keywords.

	 * @return bool True if the pattern was registered with success and false otherwise.

	 */

	public function register( $pattern_name, $pattern_properties ) {

		if ( ! isset( $pattern_name ) || ! is_string( $pattern_name ) ) {

			return false;

		}

		if ( ! isset( $pattern_properties['title'] ) || ! is_string( $pattern_properties['title'] ) ) {

			return false;

		}

		if ( ! isset( $pattern_properties['content'] ) || ! is_string( $pattern_properties['content'] ) ) {

			return false;

		}

		$this->registered_patterns[ $pattern_name ] = array_merge(

			$pattern_properties,

			array( 'name' => $pattern_name )

		);

		return true;

	}

	/**

	 * Unregisters a pattern.

	 *

	 * @since 5.5.0

	 *

	 * @param string $pattern_name Pattern name including namespace.

	 * @return bool True if the pattern was unregistered with success and false otherwise.

	 */

	public function unregister( $pattern_name ) {

		if ( ! $this->is_registered( $pattern_name ) ) {

			return false;

		}

		unset( $this->registered_patterns[ $pattern_name ] );

		return true;

	}

	/**

	 * Retrieves an array containing the properties of a registered pattern.

	 *

	 * @since 5.5.0

	 *

	 * @param string $pattern_name Pattern name including namespace.

	 * @return array Registered pattern properties.

	 */

	public function get_registered( $pattern_name ) {

		if ( ! $this->is_registered( $pattern_name ) ) {

			return null;

		}

		return $this->registered_patterns[ $pattern_name ];

	}

	/**

	 * Retrieves all registered patterns.

	 *

	 * @since 5.5.0

	 *

	 * @return array Array of arrays containing the registered patterns properties,

	 *               and per style.

	 */

	public function get_all_registered() {

		return array_values( $this->registered_patterns );

	}

	/**

	 * Checks if a pattern is registered.

	 *

	 * @since 5.5.0

	 *

	 * @param string $pattern_name Pattern name including namespace.

	 * @return bool True if the pattern is registered, false otherwise.

	 */

	public function is_registered( $pattern_name ) {

		return isset( $this->registered_patterns[ $pattern_name ] );

	}

	/**

	 * Utility method to retrieve the main instance of the class.

	 *

	 * The instance will be created if it does not exist yet.

	 *

	 * @since 5.5.0

	 *

	 * @return WP_Block_Patterns_Registry The main instance.

	 */

	public static function get_instance() {

		if ( null === self::$instance ) {

			self::$instance = new self();

		}

		return self::$instance;

	}

}

/**

 * Registers a new pattern.

 *

 * @since 5.5.0

 *

 * @param string $pattern_name       Pattern name including namespace.

 * @param array  $pattern_properties Array containing the properties of the pattern.

 * @return bool True if the pattern was registered with success and false otherwise.

 */

function register_block_pattern( $pattern_name, $pattern_properties ) {

	return WP_Block_Patterns_Registry::get_instance()->register( $pattern_name, $pattern_properties );

}

/**

 * Unregisters a pattern.

 *

 * @since 5.5.0

 *

 * @return bool True if the pattern was unregistered with success and false otherwise.

 */

function unregister_block_pattern( $pattern_name ) {

	return WP_Block_Patterns_Registry::get_instance()->unregister( $pattern_name );

}