<?php
	
	/*
	 *	NM - WooCommerce Product Search
	 */
	
	global $nm_theme_options;
	
	
	/* Search: Prevent single search result from redirecting to the product page */
	add_filter( 'woocommerce_redirect_single_search_result', '__return_false' );
	
			
	if ( $nm_theme_options['shop_search_by_titles'] ) {
		/*
		 *	Search: Limit to product titles
		 *
		 *	https://wordpress.org/plugins/woocommerce-filter-search/
		 */
		function nm_woocommerce_search_by_title_only( $search, &$wp_query ) {
			global $wpdb;
			
			// NM: Specify post types that should only be searched by title
			$not_allowed_post_types = apply_filters( 'wc_filter_search_not_allowed_array', array(
				'product', // WooCommerce product
			) );
		
			if ( empty( $search ) || ! in_array( $wp_query->query_vars['post_type'], $not_allowed_post_types ) ) {
				return $search;
			}
			
			$q = $wp_query->query_vars;
			$n = ! empty( $q['exact'] ) ? '' : '%';
			
			$search =
			$searchand = '';
			
			foreach ( (array) $q['search_terms'] as $term ) {
				$term = esc_sql( $wpdb->esc_like( $term ) );
				$search .= "{$searchand}($wpdb->posts.post_title LIKE '{$n}{$term}{$n}')";
				$searchand = ' AND ';
			}
		
			if ( ! empty( $search ) ) {
				$search = " AND ({$search}) ";
				if ( ! is_user_logged_in() ) {
					$search .= " AND ($wpdb->posts.post_password = '') ";
				}
			}
		
			return $search;
		}
		add_filter( 'posts_search', 'nm_woocommerce_search_by_title_only', 500, 2 );
		
		
		/*
		 *	Search: Disable WooCommerce product excerpt search
		 *	
		 *	https://wordpress.org/plugins/woocommerce-filter-search/
		 */
		function nm_woocommerce_disable_excerpt_search( $where = '' ) {
			global $wp_the_query;
		
			// If this is not a WC Query, do not modify the query
			if ( empty( $wp_the_query->query_vars['wc_query'] ) || empty( $wp_the_query->query_vars['s'] ) )
				return $where;
		
			$where = preg_replace(
				"/\s+OR\s+\(post_excerpt\s+LIKE\s*(\'\%[^\%]+\%\')\)/",
				"", $where );
		
			return $where;
		}
		add_filter( 'posts_where', 'nm_woocommerce_disable_excerpt_search', 15 );
	}