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Filename : amp.cls.php
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<?php
/**
 * The Third Party integration with AMP plugin.
 *
 * @since		2.9.8.6
 * @package		LiteSpeed_Cache
 * @subpackage	LiteSpeed_Cache/thirdparty
 * @author		LiteSpeed Technologies <info@litespeedtech.com>
 */
namespace LiteSpeed\Thirdparty ;

defined( 'WPINC' ) || exit ;

use \LiteSpeed\API ;

class AMP {
	/**
	 * @since 4.2
	 */
	private static function _maybe_amp( $amp_function ) {
		if ( is_admin() ) {
			return;
		}
		if ( ! isset( $_GET[ 'amp' ] ) && ( ! function_exists( $amp_function ) || ! $amp_function() ) ) {
			return;
		}

		do_action( 'litespeed_debug', '[3rd] ❌ AMP disabled page optm/lazy' );

		! defined( 'LITESPEED_NO_PAGEOPTM' ) && define( 'LITESPEED_NO_PAGEOPTM', true );
		! defined( 'LITESPEED_NO_LAZY' ) && define( 'LITESPEED_NO_LAZY', true );
		! defined( 'LITESPEED_NO_OPTM' ) && define( 'LITESPEED_NO_OPTM', true );
		// ! defined( 'LITESPEED_GUEST' ) && define( 'LITESPEED_GUEST', false );
	}

	/**
	 * ampforwp_is_amp_endpoint() from Accelerated Mobile Pages
	 *
	 * @since 4.2
	 */
	public static function maybe_acc_mob_pages() {
		self::_maybe_amp( 'ampforwp_is_amp_endpoint' );
	}

	/**
	 * Google AMP fix
	 *
	 * @since 4.2.0.1
	 */
	public static function maybe_google_amp() {
		self::_maybe_amp( 'amp_is_request' );
	}

	/**
	 * CSS async will affect AMP result and
	 * Lazyload will inject JS library which AMP not allowed
	 * need to force set false before load
	 *
	 * @since 2.9.8.6
	 * @access public
	 */
	public static function preload() {
		add_action( 'wp', __CLASS__ . '::maybe_acc_mob_pages' );
		add_action( 'wp', __CLASS__ . '::maybe_google_amp' );

		// amp_is_request() from AMP
		// self::maybe_amp( 'amp_is_request' );
		// add_filter( 'litespeed_can_optm', '__return_false' );
		// do_action( 'litespeed_conf_force', API::O_OPTM_CSS_ASYNC, false );
		// do_action( 'litespeed_conf_force', API::O_MEDIA_LAZY, false );
		// do_action( 'litespeed_conf_force', API::O_MEDIA_IFRAME_LAZY, false );
	}
}