Sync: IDC: Add support for domain mapping

Author: ebinnion

3rd-party/3rd-party.php

@@ -10,6 +10,7 @@
 require_once( JETPACK__PLUGIN_DIR . '3rd-party/bitly.php' );
 require_once( JETPACK__PLUGIN_DIR . '3rd-party/bbpress.php' );
 require_once( JETPACK__PLUGIN_DIR . '3rd-party/woocommerce.php' );
+require_once( JETPACK__PLUGIN_DIR . '3rd-party/domain-mapping.php' );
 
 // We can't load this conditionally since polldaddy add the call in class constuctor.
 require_once( JETPACK__PLUGIN_DIR . '3rd-party/polldaddy.php' );

3rd-party/domain-mapping.php

@@ -0,0 +1,37 @@
+<?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();
+		}
+	}
+	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;
+		}
+
+		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' ) );
+	}
+endif;