<?php
/*
Plugin Name: WP Engine Site Migration Compatibility
Description: Prevents 3rd party plugins from being loaded during a migration specific operation
Author: WP Engine
Version: 1.4
Author URI: https://wpengine.com/?utm_source=migrate_plugin&utm_medium=referral&utm_campaign=bx_prod_referral&utm_content=migrate_mu_plugin_author_link
*/

defined( 'ABSPATH' ) || exit;

if ( ! version_compare( PHP_VERSION, '5.4', '>=' ) || ! empty( $GLOBALS['wpmdb_compatibility']['active'] ) ) {
	return;
}

if ( defined( 'WP_PLUGIN_DIR' ) ) {
	$plugins_dir = trailingslashit( WP_PLUGIN_DIR );
} elseif ( defined( 'WPMU_PLUGIN_DIR' ) ) {
	$plugins_dir = trailingslashit( WPMU_PLUGIN_DIR );
} elseif ( defined( 'WP_CONTENT_DIR' ) ) {
	$plugins_dir = trailingslashit( WP_CONTENT_DIR ) . 'plugins/';
} else {
	$plugins_dir = plugin_dir_path( __FILE__ ) . '../plugins/';
}

$compat_class_path            = 'class/Common/Compatibility/Compatibility.php';
$compat_class_name            = 'DeliciousBrains\WPMDB\Common\Compatibility\Compatibility';
$wpmdbpro_compatibility_class = $plugins_dir . 'wp-migrate-db-pro/' . $compat_class_path;
$wpmdb_compatibility_class    = $plugins_dir . 'wp-migrate-db/' . $compat_class_path;
$wpesm_compatibility_class    = $plugins_dir . 'wpe-site-migration/' . $compat_class_path;

// As none of the needed plugins should have been loaded yet,
// and we can't test whether any of them are active without affecting the
// mechanism we later use to "unload" plugins during a migration specific
// request, we can only test for and load the compatibility code in an order
// that is most likely to give us the most up-to-date or relevant code.
if ( file_exists( $wpesm_compatibility_class ) ) {
	include_once $wpesm_compatibility_class;
} elseif ( file_exists( $wpmdbpro_compatibility_class ) ) {
	include_once $wpmdbpro_compatibility_class;
} elseif ( file_exists( $wpmdb_compatibility_class ) ) {
	include_once $wpmdb_compatibility_class;
}

if ( class_exists( $compat_class_name ) ) {
	$compatibility = new $compat_class_name;
	$compatibility->register();
	$GLOBALS['wpmdb_compatibility']['active'] = true;
}