Sync: IDC: 3rd Party: Hook domain mapping plugins to sync filters

Author: ebinnion

3rd-party/domain-mapping.php

@@ -1,37 +1,62 @@
 <?php
 
 if ( Jetpack_Constants::is_defined( 'SUNRISE' ) ) :
-	function jetpack_domain_mapping_check_compatible_plugins() {
-		// Once we've satisfied a condition for adding domain mapping compatibility, then bail
-		$hooked = jetpack_domain_mapping_maybe_support_wordpress_mu_domain_mapping();
 
-		if ( ! $hooked ) {
-			jetpack_domain_mapping_maybe_add_wpmu_dev_domain_mapping_support();
+	/**
+	 * Class Jetpack_3rd_Party_Domain_Mapping
+	 *
+	 * This class contains methods that are used to provide compatibility between Jetpack sync and domain mapping plugins.
+	 */
+	class Jetpack_3rd_Party_Domain_Mapping {
+
+		/**
+		 * This method will test for a constant and function that are known to be used with Donncha's WordPress MU
+		 * Domain Mapping plugin. If conditions are met, we hook the domain_mapping_siteurl() function to Jetpack sync
+		 * filters for home_url and site_url callables.
+		 *
+		 * @return bool
+		 */
+		static function hook_wordpress_mu_domain_mapping() {
+			if ( ! Jetpack_Constants::is_defined( 'DOMAIN_MAPPING' ) || function_exists( 'domain_mapping_siteurl' ) ) {
+				return false;
+			}
+
+			add_filter( 'jetpack_sync_home_url', 'domain_mapping_siteurl' );
+			add_filter( 'jetpack_sync_site_url', 'domain_mapping_siteurl' );
+
+			return true;
 		}
-	}
-	add_action( 'plugins_loaded', 'jetpack_domain_mapping_compatibility' );
 
-	// Compatibility with Donncha's WordPress MU Domain Mapping plugin
-	function jetpack_domain_mapping_maybe_support_wordpress_mu_domain_mapping() {
-		if ( ! Jetpack_Constants::is_defined( 'DOMAIN_MAPPING' ) || function_exists( 'domain_mapping_siteurl' ) ) {
-			return false;
+		/**
+		 * This method will test for a class and method known to be used in WPMU Dev's domain mapping plugin. If the
+		 * method exists, then we'll hook the swap_to_mapped_url() to our Jetpack sync fitlers for home_url and site_url.
+		 *
+		 * @return bool
+		 */
+		static function hook_wpmu_dev_domain_mapping() {
+			if ( ! class_exists( 'domain_map' ) || ! method_exists( 'domain_map', 'utils' ) ) {
+				return false;
+			}
+
+			$utils = domain_map::utils();
+			add_filter( 'jetpack_sync_home_url', array( $utils, 'swap_to_mapped_url' ) );
+			add_filter( 'jetpack_sync_site_url', array( $utils, 'swap_to_mapped_url' ) );
+
+			return true;
 		}
-
-		add_filter( 'jetpack_sync_home_url', 'domain_mapping_siteurl' );
-		add_filter( 'jetpack_sync_site_url', 'domain_mapping_siteurl' );
-
-		return true;
 	}
 
-
-	// Compatibility with WPMU DEV's Domain Mapping plugin
-	function jetpack_domain_mapping_maybe_add_wpmu_dev_domain_mapping_support() {
-		if ( ! class_exists( 'domain_map' ) || ! method_exists( 'domain_map', 'utils' ) ) {
-			return false;
-		}
-
-		$utils = domain_map::utils();
-		add_filter( 'jetpack_sync_home_url', array( $utils, 'swap_to_mapped_url' ) );
-		add_filter( 'jetpack_sync_site_url', array( $utils, 'swap_to_mapped_url' ) );
+	/**
+	 * This function is called on the plugins_loaded action and will loop through the methods of
+	 * Jetpack_3rd_Party_Domain_Mapping to try and hook a domain mapping plugin to the Jetpack sync
+	 * filters for the home_url and site_url callables.
+	 */
+	function jetpack_domain_mapping_hook_compatible_plugins() {
+		$methods = get_class_methods( 'Jetpack_3rd_Party_Domain_Mapping' );
+		do {
+			$method = array_pop( $methods );
+			$hooked = call_user_func( 'Jetpack_3rd_Party_Domain_Mapping', $method );
+		} while( ! $hooked && ! empty( $methods ) );
 	}
-endif;
+	add_action( 'plugins_loaded', 'jetpack_domain_mapping_hook_compatible_plugins' );
+endif;