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Filename : yith-wishlist.cls.php
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<?php
/**
 * The Third Party integration with the YITH WooCommerce Wishlist plugin.
 *
 * @since		1.1.0
 */
namespace LiteSpeed\Thirdparty;

defined( 'WPINC' ) || exit;

use \LiteSpeed\Tag;
use \LiteSpeed\Conf;
use \LiteSpeed\Base;

class Yith_Wishlist {
	const ESI_PARAM_POSTID = 'yith_pid';
	private static $_post_id;


	/**
	 * Detects if YITH WooCommerce Wishlist and WooCommerce are installed.
	 *
	 * @since 1.1.0
	 * @access public
	 */
	public static function detect() {
		if ( ! defined( 'WOOCOMMERCE_VERSION' ) || ! defined( 'YITH_WCWL' ) ) {
			return;
		}
		if ( apply_filters( 'litespeed_esi_status', false ) ) {
			add_action( 'litespeed_tpl_normal', __CLASS__ . '::is_not_esi' );
			add_action( 'litespeed_esi_load-yith_wcwl_add', __CLASS__ . '::load_add_to_wishlist' );
			add_filter( 'litespeed_esi_inline-yith_wcwl_add', __CLASS__ . '::inline_add_to_wishlist', 20, 2 );

			// hook to add/delete wishlist
			add_action( 'yith_wcwl_added_to_wishlist', __CLASS__ . '::purge' );
			add_action( 'yith_wcwl_removed_from_wishlist', __CLASS__ . '::purge' );
		}
	}

	/**
	 * Purge ESI yith cache when add/remove items
	 *
	 * @since 1.2.0
	 * @access public
	 */
	public static function purge() {
		do_action( 'litespeed_purge_esi', 'yith_wcwl_add' );
	}

	/**
	 * Hooked to the litespeed_is_not_esi_template action.
	 *
	 * If the request is not an ESI request, hook to the add to wishlist button
	 * filter to replace it as an esi block.
	 *
	 * @since 1.1.0
	 * @access public
	 */
	public static function is_not_esi() {
		add_filter( 'yith_wcwl_add_to_wishlist_params', __CLASS__ . '::add_to_wishlist_params', 999, 2 );

		add_filter( 'yith_wcwl_add_to_wishlisth_button_html', __CLASS__ . '::sub_add_to_wishlist', 999 );
	}

	/**
	 * Store the post id for later shortcode usage
	 *
	 * @since  3.4.1
	 */
	public static function add_to_wishlist_params( $defaults, $atts ) {
		self::$_post_id = ! empty( $atts[ 'product_id' ] ) ? $atts[ 'product_id' ] : $defaults[ 'product_id' ];

		return $defaults;
	}

	/**
	 * Hooked to the yith_wcwl_add_to_wishlisth_button_html filter.
	 *
	 * The add to wishlist button displays a different output when the item is already in the wishlist/cart.
	 * For this reason, the button must be an ESI block. This function replaces the normal html with the ESI block.
	 *
	 * @since 1.1.0
	 * @access public
	 */
	public static function sub_add_to_wishlist( $template ) {
		$params = array(
			self::ESI_PARAM_POSTID => self::$_post_id,
		);

		$inline_tags = array(
			'',
			rtrim( Tag::TYPE_ESI, '.' ),
			Tag::TYPE_ESI . 'yith_wcwl_add',
		);
		$inline_tags = implode( ',', array_map( function($val){ return 'public:' . LSWCP_TAG_PREFIX . '_' . $val; }, $inline_tags ) );
		$inline_tags .= ',' . LSWCP_TAG_PREFIX . '_tag_priv';

		do_action( 'litespeed_esi_combine', 'yith_wcwl_add' );

		$inline_params = array(
			'val'	=> $template,
			'tag'	=> $inline_tags,
			'control' => 'private,no-vary,max-age=' . Conf::cls()->conf( Base::O_CACHE_TTL_PRIV ),
		);

		return apply_filters( 'litespeed_esi_url', 'yith_wcwl_add', 'YITH ADD TO WISHLIST', $params, 'private,no-vary', false, false, false, $inline_params );
	}

	/**
	 * Hooked to the litespeed_esi_load-yith_wcwl_add action.
	 *
	 * This will load the add to wishlist button html for output.
	 *
	 * @since 1.1.0
	 * @access public
	 */
	public static function load_add_to_wishlist( $params ) {
		// global $post, $wp_query;
		// $post = get_post( $params[ self::ESI_PARAM_POSTID ] );
		// $wp_query->setup_postdata( $post );
		echo \YITH_WCWL_Shortcode::add_to_wishlist( array( 'product_id' => $params[ self::ESI_PARAM_POSTID ] ) );
		do_action( 'litespeed_control_set_private', 'yith wishlist' );
		do_action( 'litespeed_vary_no' );
	}

	/**
	 * Generate ESI inline value
	 *
	 * @since  3.4.2
	 */
	public static function inline_add_to_wishlist( $res, $params ) {
		if ( ! is_array( $res ) ) {
			$res = array();
		}

		$pid = $params[ self::ESI_PARAM_POSTID ];

		$res[ 'val' ] = \YITH_WCWL_Shortcode::add_to_wishlist( array( 'product_id' => $pid ) );

		$res[ 'control' ] = 'private,no-vary,max-age=' . Conf::cls()->conf( Base::O_CACHE_TTL_PRIV );

		$inline_tags = array(
			'',
			rtrim( Tag::TYPE_ESI, '.' ),
			Tag::TYPE_ESI . 'yith_wcwl_add',
		);
		$inline_tags = implode( ',', array_map( function( $val ) { return 'public:' . LSWCP_TAG_PREFIX . '_' . $val; }, $inline_tags ) );
		$inline_tags .= ',' . LSWCP_TAG_PREFIX . '_tag_priv';

		$res[ 'tag' ] = $inline_tags;

		return $res;
	}

}