<?php
defined( 'ABSPATH' ) || die( 'Cheatin&#8217; uh?' );

/**
 * Allow to purge the Varnish cache
 *
 * @since 2.6.8
 *
 * @param bool true will force the Varnish purge
 */
if ( apply_filters( 'do_rocket_varnish_http_purge', false ) || get_rocket_option( 'varnish_auto_purge', 0 ) ) :
	/**
	 * Purge all the domain
	 *
	 * @since 2.6.8
	 *
	 * @param string $root The path of home cache file.
	 * @param string $lang The current lang to purge.
	 * @param string $url  The home url.
	 */
	function rocket_varnish_clean_domain( $root, $lang, $url ) {
		rocket_varnish_http_purge( trailingslashit( $url ) . '?vregex' );
	}
	add_action( 'before_rocket_clean_domain', 'rocket_varnish_clean_domain', 10, 3 );

	/**
	 * Purge a specific page
	 *
	 * @since 2.6.8
	 *
	 * @param string $url The url to purge.
	 */
	function rocket_varnish_clean_file( $url ) {
		rocket_varnish_http_purge( trailingslashit( $url ) . '?vregex' );
	}
	add_action( 'before_rocket_clean_file', 'rocket_varnish_clean_file' );

	/**
	 * Purge the homepage and its pagination
	 *
	 * @since 2.6.8
	 *
	 * @param string $root The path of home cache file.
	 * @param string $lang The current lang to purge.
	 */
	function rocket_varnish_clean_home( $root, $lang ) {
		$home_url            = trailingslashit( get_rocket_i18n_home_url( $lang ) );
		$home_pagination_url = $home_url . trailingslashit( $GLOBALS['wp_rewrite']->pagination_base ) . '?vregex';

		rocket_varnish_http_purge( $home_url );
		rocket_varnish_http_purge( $home_pagination_url );
	}
	add_action( 'before_rocket_clean_home', 'rocket_varnish_clean_home', 10, 2 );

	if ( get_rocket_option( 'do_cloudflare' ) ) {
		/**
		 * Sets the Varnish IP to localhost if Cloudflare is active
		 *
		 * @since 3.3.5
		 * @author Remy Perona
		 *
		 * @return string
		 */
		function rocket_varnish_proxy_host() {
			return 'localhost';
		}
		add_filter( 'rocket_varnish_ip', 'rocket_varnish_proxy_host', 9 );

		/**
		 * Sets the Host header to the website domain if Cloudflare is active
		 *
		 * @since 3.3.5
		 * @author Remy Perona
		 *
		 * @return string
		 */
		function rocket_varnish_proxy_request_host() {
			return wp_parse_url( home_url(), PHP_URL_HOST );
		}
		add_filter( 'rocket_varnish_purge_request_host', 'rocket_varnish_proxy_request_host', 9 );
	}
endif;