Integrate SearchWP with WP-Views Parametric Search

gistfile1.php

<?php

/**
 * Tell WP Views Parametric Search to restrict it's results pool
 *      to what SearchWP finds, based on our custom setup
 */

// tell WP-Views to limit the results pool
function my_searchwp_wpvparametric( $query ){

	global $searchwp;

	// UPDATE THESE
	$search_query_variable_name     = 'wpv_post_search';
	$search_paged_variable_name     = 'wpv_paged_preload_reach';
	$searchwp_engine_name           = 'default';

	// retrieve our search query if applicable
	$search_query = isset( $_REQUEST[ $search_query_variable_name ] ) ? sanitize_text_field( $_REQUEST[ $search_query_variable_name ] ) : '';

	// retrieve our pagination if applicable
	$swppg = isset( $_REQUEST[ $search_paged_variable_name ] ) ? absint( $_REQUEST[ $search_paged_variable_name ] ) : 1;

	if( ! empty( $search_query ) && class_exists( 'SearchWP' ) ) {
		add_filter( 'searchwp_posts_per_page', 'my_searchwp_wpv_ppp' );
		add_filter( 'searchwp_load_posts', '__return_false' );

		$posts = $searchwp->search( $searchwp_engine_name, $search_query, $swppg );

		if ( empty( $posts ) ) {
			$posts = array( 0 );
		}

		$query['post__in'] = $posts;
	}

	return $query;
}

add_filter( 'wpv_filter_query', 'my_searchwp_wpvparametric' );

// callback to set up custom posts per page
function my_searchwp_wpv_ppp() {
	return -1;
}