<?php

/**

 * Style Engine: WP_Style_Engine_CSS_Rules_Store class

 *

 * @package WordPress

 * @subpackage StyleEngine

 * @since 6.1.0

 */

/**

 * Core class used as a store for WP_Style_Engine_CSS_Rule objects.

 *

 * Holds, sanitizes, processes, and prints CSS declarations for the style engine.

 *

 * @since 6.1.0

 */

#[AllowDynamicProperties]

class WP_Style_Engine_CSS_Rules_Store {

	/**

	 * An array of named WP_Style_Engine_CSS_Rules_Store objects.

	 *

	 * @static

	 *

	 * @since 6.1.0

	 * @var WP_Style_Engine_CSS_Rules_Store[]

	 */

	protected static $stores = array();

	/**

	 * The store name.

	 *

	 * @since 6.1.0

	 * @var string

	 */

	protected $name = '';

	/**

	 * An array of CSS Rules objects assigned to the store.

	 *

	 * @since 6.1.0

	 * @var WP_Style_Engine_CSS_Rule[]

	 */

	protected $rules = array();

	/**

	 * Gets an instance of the store.

	 *

	 * @since 6.1.0

	 *

	 * @param string $store_name The name of the store.

	 * @return WP_Style_Engine_CSS_Rules_Store|void

	 */

	public static function get_store( $store_name = 'default' ) {

		if ( ! is_string( $store_name ) || empty( $store_name ) ) {

			return;

		}

		if ( ! isset( static::$stores[ $store_name ] ) ) {

			static::$stores[ $store_name ] = new static();

			// Set the store name.

			static::$stores[ $store_name ]->set_name( $store_name );

		}

		return static::$stores[ $store_name ];

	}

	/**

	 * Gets an array of all available stores.

	 *

	 * @since 6.1.0

	 *

	 * @return WP_Style_Engine_CSS_Rules_Store[]

	 */

	public static function get_stores() {

		return static::$stores;

	}

	/**

	 * Clears all stores from static::$stores.

	 *

	 * @since 6.1.0

	 */

	public static function remove_all_stores() {

		static::$stores = array();

	}

	/**

	 * Sets the store name.

	 *

	 * @since 6.1.0

	 *

	 * @param string $name The store name.

	 */

	public function set_name( $name ) {

		$this->name = $name;

	}

	/**

	 * Gets the store name.

	 *

	 * @since 6.1.0

	 *

	 * @return string

	 */

	public function get_name() {

		return $this->name;

	}

	/**

	 * Gets an array of all rules.

	 *

	 * @since 6.1.0

	 *

	 * @return WP_Style_Engine_CSS_Rule[]

	 */

	public function get_all_rules() {

		return $this->rules;

	}

	/**

	 * Gets a WP_Style_Engine_CSS_Rule object by its selector.

	 * If the rule does not exist, it will be created.

	 *

	 * @since 6.1.0

	 * @since 6.6.0 Added the $rules_group parameter.

	 *

	 * @param string $selector The CSS selector.

	 * @param string $rules_group A parent CSS selector in the case of nested CSS, or a CSS nested @rule,

	 *                            such as `@media (min-width: 80rem)` or `@layer module`.

	 * @return WP_Style_Engine_CSS_Rule|void Returns a WP_Style_Engine_CSS_Rule object,

	 *                                       or void if the selector is empty.

	 */

	public function add_rule( $selector, $rules_group = '' ) {

		$selector    = $selector ? trim( $selector ) : '';

		$rules_group = $rules_group ? trim( $rules_group ) : '';

		// Bail early if there is no selector.

		if ( empty( $selector ) ) {

			return;

		}

		if ( ! empty( $rules_group ) ) {

			if ( empty( $this->rules[ "$rules_group $selector" ] ) ) {

				$this->rules[ "$rules_group $selector" ] = new WP_Style_Engine_CSS_Rule( $selector, array(), $rules_group );

			}

			return $this->rules[ "$rules_group $selector" ];

		}

		// Create the rule if it doesn't exist.

		if ( empty( $this->rules[ $selector ] ) ) {

			$this->rules[ $selector ] = new WP_Style_Engine_CSS_Rule( $selector );

		}

		return $this->rules[ $selector ];

	}

	/**

	 * Removes a selector from the store.

	 *

	 * @since 6.1.0

	 *

	 * @param string $selector The CSS selector.

	 */

	public function remove_rule( $selector ) {

		unset( $this->rules[ $selector ] );

	}

}