table exist
     *
     * @return bool
     */
    public static function isTableExists( $tableName )
    {
        global  $wpdb ;
        $exist = false;
        $wpdb->hide_errors();
        if ( empty($tableName) ) {
            return false;
        }
        $sql = $wpdb->prepare( "SHOW TABLES LIKE %s", $wpdb->prefix . 'dgwt_wcas_%' );
        $result = $wpdb->get_col( $sql );
        if ( is_array( $result ) && in_array( $tableName, $result ) ) {
            $exist = true;
        }
        return $exist;
    }
    
    /**
     * Check if the engine can search in variable products
     *
     * @return bool
     */
    public static function canSearchInVariableProducts()
    {
        global  $wpdb ;
        $allow = false;
        $el = $wpdb->get_var( "SELECT ID FROM {$wpdb->posts} WHERE post_type = 'product_variation' LIMIT 1" );
        if ( !empty($el) && is_numeric( $el ) ) {
            $allow = true;
        }
        if ( DGWT_WCAS()->settings->getOption( 'search_in_product_content' ) !== 'on' ) {
            $allow = false;
        }
        return apply_filters( 'dgwt/wcas/search_in_variable_products', $allow );
    }
    
    /**
     * Allow to remove method for an hook when, it's a class method used and class don't have variable, but you know the class name
     *
     * @link https://github.com/herewithme/wp-filters-extras
     * @return bool
     */
    public static function removeFiltersForAnonymousClass(
        $hook_name = '',
        $class_name = '',
        $method_name = '',
        $priority = 0
    )
    {
        global  $wp_filter ;
        // Take only filters on right hook name and priority
        if ( !isset( $wp_filter[$hook_name][$priority] ) || !is_array( $wp_filter[$hook_name][$priority] ) ) {
            return false;
        }
        // Loop on filters registered
        foreach ( (array) $wp_filter[$hook_name][$priority] as $unique_id => $filter_array ) {
            // Test if filter is an array ! (always for class/method)
            if ( isset( $filter_array['function'] ) && is_array( $filter_array['function'] ) ) {
                // Test if object is a class, class and method is equal to param !
                if ( is_object( $filter_array['function'][0] ) && get_class( $filter_array['function'][0] ) && get_class( $filter_array['function'][0] ) == $class_name && $filter_array['function'][1] == $method_name ) {
                    // Test for WordPress >= 4.7 WP_Hook class (https://make.wordpress.org/core/2016/09/08/wp_hook-next-generation-actions-and-filters/)
                    
                    if ( is_a( $wp_filter[$hook_name], 'WP_Hook' ) ) {
                        unset( $wp_filter[$hook_name]->callbacks[$priority][$unique_id] );
                    } else {
                        unset( $wp_filter[$hook_name][$priority][$unique_id] );
                    }
                
                }
            }
        }
        return false;
    }
    
    /**
     * Create tooltip
     *
     * @param string $id
     * @param string $content
     * @param string $template
     * @param string $placement
     * @param string $class
     *
     * @return string
     */
    public static function createTooltip(
        $id,
        $content = '',
        $template = '',
        $placement = 'right',
        $class = ''
    )
    {
        
        if ( !empty($template) ) {
            $file = DGWT_WCAS_DIR . 'partials/admin/tooltips/' . $template . '.php';
            
            if ( file_exists( $file ) ) {
                ob_start();
                require $file;
                $content = ob_get_contents();
                ob_end_clean();
            }
        
        }
        
        $id = 'js-dgwt-wcas-tooltip-id' . sanitize_key( $id );
        $html = '<div class="js-dgwt-wcas-tooltip ' . $class . '" data-tooltip-html-el="' . $id . '" data-tooltip-placement="' . $placement . '"></div>';
        $html .= '<div class="' . $id . '" style="display:none;"><div class="dgwt-wcas-tooltip-wrapper">' . $content . '</div></div>';
        return $html;
    }
    
    /**
     * Create HTML override option tooltip
     *
     * @param string $id
     * @param string $content
     * @param string $template
     * @param string $placement
     *
     * @return string
     */
    public static function getOverrideOptionText( $theme )
    {
        $linkToShortcodesDoc = 'https://fibosearch.com/documentation/get-started/how-to-add-fibosearch-to-your-website/#add-fibosearch-with-a-shortcode';
        $content = '<p>' . sprintf( __( 'This option is <b>overridden</b> by the seamless integration with the %s theme. If you want to change the value of this option, disable the integration in <br /><b>WooCommerce -> FiboSearch -> Starting (tab)</b>.', 'ajax-search-for-woocommerce' ), $theme ) . '</p>';
        $content .= '<p>' . sprintf( __( 'Furthermore, you can override this option for a specific search bar via shortcode params. <a href="%s" target="_blank">Learn more about shortcodes parameters</a>.', 'ajax-search-for-woocommerce' ), $linkToShortcodesDoc ) . '</p>';
        return $content;
    }
    
    /**
     * Create HTML question mark with tooltip
     *
     * @param string $id
     * @param string $content
     * @param string $template
     * @param string $placement
     *
     * @return string
     */
    public static function createQuestionMark(
        $id,
        $content = '',
        $template = '',
        $placement = 'right'
    )
    {
        return self::createTooltip(
            $id,
            $content,
            $template,
            $placement,
            'dashicons dashicons-editor-help dgwt-wcas-questio-mark'
        );
    }
    
    /**
     * Create HTML option override tooltip
     *
     * @param string $id
     * @param string $content
     * @param string $template
     * @param string $placement
     *
     * @return string
     */
    public static function createOverrideTooltip(
        $id,
        $content = '',
        $template = '',
        $placement = 'right'
    )
    {
        return self::createTooltip(
            $id,
            $content,
            $template,
            $placement,
            'dashicons dashicons-lock dgwt-wcas-override-tooltip'
        );
    }
    
    /**
     * Get list of 24 hours
     */
    public static function getHours()
    {
        $hours = array();
        $cycle12 = ( get_option( 'time_format' ) === 'H:i' ? false : true );
        for ( $i = 0 ;  $i < 24 ;  $i++ ) {
            $label = ( $cycle12 ? $i . ':00 am' : $i . ':00' );
            if ( $cycle12 && $i === 0 ) {
                $label = 12 . ':00 am';
            }
            if ( $cycle12 && $i > 11 ) {
                
                if ( $i === 12 ) {
                    $label = 12 . ':00 pm';
                } else {
                    $label = $i - 12 . ':00 pm';
                }
            
            }
            $hours[$i] = $label;
        }
        return $hours;
    }
    
    /**
     * Get local date including timezone
     *
     * @param $timestamp
     * @param string $format
     *
     * @return string
     * @throws \Exception
     */
    public static function localDate( $timestamp, $format = '' )
    {
        if ( empty($timestamp) ) {
            return '';
        }
        if ( empty($format) ) {
            $format = get_option( 'date_format' ) . ' ' . get_option( 'time_format' );
        }
        $date = new \WC_DateTime( "@{$timestamp}" );
        $date->setTimezone( new \DateTimeZone( wc_timezone_string() ) );
        return $date->date_i18n( $format );
    }
    
    /**
     * Get labels
     *
     * @return array
     */
    public static function getLabels()
    {
        return apply_filters( 'dgwt/wcas/labels', array(
            'post'               => __( 'Post' ),
            'page'               => __( 'Page' ),
            'vendor'             => __( 'Vendor', 'ajax-search-for-woocommerce' ),
            'product_plu'        => __( 'Products', 'woocommerce' ),
            'post_plu'           => __( 'Posts' ),
            'page_plu'           => __( 'Pages' ),
            'vendor_plu'         => __( 'Vendors', 'ajax-search-for-woocommerce' ),
            'sku_label'          => __( 'SKU', 'woocommerce' ) . ':',
            'sale_badge'         => __( 'Sale', 'woocommerce' ),
            'vendor_sold_by'     => __( 'Sold by:', 'ajax-search-for-woocommerce' ),
            'featured_badge'     => __( 'Featured', 'woocommerce' ),
            'in'                 => _x( 'in', 'in categories fe. in Books > Crime stories', 'ajax-search-for-woocommerce' ),
            'read_more'          => __( 'continue reading', 'ajax-search-for-woocommerce' ),
            'no_results'         => DGWT_WCAS()->settings->getOption( 'search_no_results_text', __( 'No results', 'ajax-search-for-woocommerce' ) ),
            'show_more'          => DGWT_WCAS()->settings->getOption( 'search_see_all_results_text', __( 'See all products...', 'ajax-search-for-woocommerce' ) ),
            'show_more_details'  => DGWT_WCAS()->settings->getOption( 'search_see_all_results_text', __( 'See all products...', 'ajax-search-for-woocommerce' ) ),
            'search_placeholder' => DGWT_WCAS()->settings->getOption( 'search_placeholder', __( 'Search for products...', 'ajax-search-for-woocommerce' ) ),
            'submit'             => DGWT_WCAS()->settings->getOption( 'search_submit_text', '' ),
        ) );
    }
    
    /**
     * Get labels
     *
     * @param string $key
     *
     * @return string
     */
    public static function getLabel( $key )
    {
        $label = '';
        $labels = self::getLabels();
        if ( array_key_exists( $key, $labels ) ) {
            $label = $labels[$key];
        }
        return $label;
    }
    
    /**
     * Remove all HTML tags including <script> and <style> and shortcodes
     *
     * @param string $string
     * @param string $allowed
     * @param bool $removeBreaks
     *
     * @return string
     */
    public static function stripAllTags( $string, $allowableTags = '', $removeBreaks = false )
    {
        $string = strip_shortcodes( $string );
        $string = preg_replace( '@<(script|style)[^>]*?>.*?</\\1>@si', '', $string );
        $string = strip_tags( $string, $allowableTags );
        if ( $removeBreaks ) {
            $string = preg_replace( '/[\\r\\n\\t ]+/', ' ', $string );
        }
        return trim( $string );
    }
    
    /**
     * Repair HTML. Close unclosed tags.
     *
     * @param $html
     *
     * @return string
     */
    public static function closeTags( $html )
    {
        preg_match_all( '#<(?!meta|img|br|hr|input\\b)\\b([a-z]+)(?: .*)?(?<![/|/ ])>#iU', $html, $result );
        $openedTags = $result[1];
        preg_match_all( '#</([a-z]+)>#iU', $html, $result );
        $closedtags = $result[1];
        $lenOpened = count( $openedTags );
        if ( count( $closedtags ) == $lenOpened ) {
            return $html;
        }
        $openedTags = array_reverse( $openedTags );
        for ( $i = 0 ;  $i < $lenOpened ;  $i++ ) {
            
            if ( !in_array( $openedTags[$i], $closedtags ) ) {
                $html .= '</' . $openedTags[$i] . '>';
            } else {
                unset( $closedtags[array_search( $openedTags[$i], $closedtags )] );
            }
        
        }
        return $html;
    }
    
    /**
     * Check if we should override default search query
     *
     * @param \WP_Query $query The WP_Query instance
     *
     * @return bool
     */
    public static function isSearchQuery( $query )
    {
        $enabled = true;
        if ( !(!empty($query) && is_object( $query ) && is_a( $query, 'WP_Query' )) ) {
            return false;
        }
        if ( !$query->is_main_query() || isset( $query->query_vars['s'] ) && !isset( $_GET['dgwt_wcas'] ) || !isset( $query->query_vars['s'] ) || !$query->is_search() || $query->get( 'post_type' ) && is_string( $query->get( 'post_type' ) ) && $query->get( 'post_type' ) !== 'product' ) {
            $enabled = false;
        }
        $enabled = apply_filters( 'dgwt/wcas/helpers/is_search_query', $enabled, $query );
        return $enabled;
    }
    
    /**
     * Check if this is a product search page
     *
     * @return bool
     */
    public static function isProductSearchPage()
    {
        if ( isset( $_GET['dgwt_wcas'] ) && isset( $_GET['post_type'] ) && $_GET['post_type'] === 'product' && isset( $_GET['s'] ) ) {
            return true;
        }
        return false;
    }
    
    /**
     * Check if this is a remote search request
     *
     * @return bool
     */
    public static function isRemoteSearchRequest()
    {
        if ( isset( $_GET['wc-ajax'] ) && $_GET['wc-ajax'] === DGWT_WCAS_SEARCH_ACTION && !empty($_GET['remote']) && isset( $_GET['s'] ) ) {
            return true;
        }
        return false;
    }
    
    /**
     * Restore the search phrase so that it can be used in the template.
     *
     * @param \WP_Post[] $posts Array of post objects.
     * @param \WP_Query $query The WP_Query instance (passed by reference).
     *
     * @return mixed
     */
    public static function rollbackSearchPhrase( $posts, $query )
    {
        if ( !$query->get( 'dgwt_wcas', false ) ) {
            return $posts;
        }
        $query->set( 's', wp_unslash( $query->get( 'dgwt_wcas', '' ) ) );
        return $posts;
    }
    
    /**
     * Clear default search query if our engine is active
     *
     * @param string $search Search SQL for WHERE clause.
     * @param \WP_Query $query The current WP_Query object.
     *
     * @return string
     */
    public static function clearSearchQuery( $search, $query )
    {
        if ( !$query->get( 'dgwt_wcas', false ) ) {
            return $search;
        }
        return '';
    }
    
    /**
     * Get formatted search layout settings
     *
     * @return object
     */
    public static function getLayoutSettings()
    {
        $layoutBreakpoint = DGWT_WCAS()->settings->getOption( 'mobile_breakpoint', 992 );
        $layoutBreakpoint = apply_filters( 'dgwt/wcas/scripts/mobile_breakpoint', $layoutBreakpoint );
        // deprecated
        $mobileOverlayBreakpoint = DGWT_WCAS()->settings->getOption( 'mobile_overlay_breakpoint', 992 );
        $layout = array(
            'style'                     => DGWT_WCAS()->settings->getOption( 'search_style', 'solaris' ),
            'icon'                      => 'magnifier-thin',
            'layout'                    => DGWT_WCAS()->settings->getOption( 'search_layout', 'classic' ),
            'layout_breakpoint'         => apply_filters( 'dgwt/wcas/scripts/layout_breakpoint', $layoutBreakpoint ),
            'mobile_overlay'            => ( DGWT_WCAS()->settings->getOption( 'enable_mobile_overlay' ) === 'on' ? true : false ),
            'mobile_overlay_breakpoint' => apply_filters( 'dgwt/wcas/scripts/mobile_overlay_breakpoint', $mobileOverlayBreakpoint ),
            'mobile_overlay_wrapper'    => apply_filters( 'dgwt/wcas/scripts/mobile_overlay_wrapper', 'body' ),
            'darken_background'         => ( DGWT_WCAS()->settings->getOption( 'darken_background', 'off' ) === 'on' ? true : false ),
            'icon_color'                => DGWT_WCAS()->settings->getOption( 'search_icon_color' ),
        );
        if ( $layout['style'] === 'pirx' ) {
            $layout['icon'] = 'magnifier-pirx';
        }
        return (object) $layout;
    }
    
    /**
     * Get frontend scripts settings
     *
     * @return array
     */
    public static function getScriptsSettings()
    {
        $layout = self::getLayoutSettings();
        // Localize
        $localize = array(
            'labels'                       => self::getLabels(),
            'ajax_search_endpoint'         => self::getEndpointUrl( 'search' ),
            'ajax_details_endpoint'        => self::getEndpointUrl( 'details' ),
            'ajax_prices_endpoint'         => self::getEndpointUrl( 'prices' ),
            'action_search'                => DGWT_WCAS_SEARCH_ACTION,
            'action_result_details'        => DGWT_WCAS_RESULT_DETAILS_ACTION,
            'action_get_prices'            => DGWT_WCAS_GET_PRICES_ACTION,
            'min_chars'                    => 3,
            'width'                        => 'auto',
            'show_details_panel'           => false,
            'show_images'                  => false,
            'show_price'                   => false,
            'show_desc'                    => false,
            'show_sale_badge'              => false,
            'show_featured_badge'          => false,
            'dynamic_prices'               => false,
            'is_rtl'                       => ( is_rtl() == true ? true : false ),
            'show_preloader'               => false,
            'show_headings'                => false,
            'preloader_url'                => '',
            'taxonomy_brands'              => '',
            'img_url'                      => DGWT_WCAS_URL . 'assets/img/',
            'is_premium'                   => dgoraAsfwFs()->is_premium(),
            'layout_breakpoint'            => $layout->layout_breakpoint,
            'mobile_overlay_breakpoint'    => $layout->mobile_overlay_breakpoint,
            'mobile_overlay_wrapper'       => $layout->mobile_overlay_wrapper,
            'mobile_overlay_delay'         => apply_filters( 'dgwt/wcas/scripts/overlay_delay_ms', 0 ),
            'debounce_wait_ms'             => apply_filters( 'dgwt/wcas/scripts/debounce_wait_ms', 400 ),
            'send_ga_events'               => apply_filters( 'dgwt/wcas/scripts/send_ga_events', true ),
            'enable_ga_site_search_module' => apply_filters( 'dgwt/wcas/scripts/enable_ga_site_search_module', false ),
            'magnifier_icon'               => self::getMagnifierIco( '' ),
            'close_icon'                   => self::getIcon( 'close' ),
            'back_icon'                    => self::getIcon( 'arrow-left' ),
            'preloader_icon'               => self::getIcon( 'preloader' ),
            'voice_search_inactive_icon'   => self::getIcon( ( $layout->style === 'pirx' ? 'voice-search-inactive-pirx' : 'voice-search-inactive' ), 'dgwt-wcas-voice-search-mic-inactive' ),
            'voice_search_active_icon'     => self::getIcon( ( $layout->style === 'pirx' ? 'voice-search-active-pirx' : 'voice-search-active' ), 'dgwt-wcas-voice-search-mic-active' ),
            'voice_search_disabled_icon'   => self::getIcon( ( $layout->style === 'pirx' ? 'voice-search-disabled-pirx' : 'voice-search-disabled' ), 'dgwt-wcas-voice-search-mic-disabled' ),
            'custom_params'                => (object) apply_filters( 'dgwt/wcas/scripts/custom_params', array() ),
            'convert_html'                 => true,
            'suggestions_wrapper'          => apply_filters( 'dgwt/wcas/scripts/suggestions_wrapper', 'body' ),
            'show_product_vendor'          => dgoraAsfwFs()->is_premium() && class_exists( 'DgoraWcas\\Integrations\\Marketplace\\Marketplace' ) && DGWT_WCAS()->marketplace->showProductVendor(),
            'disable_hits'                 => apply_filters( 'dgwt/wcas/scripts/disable_hits', false ),
            'disable_submit'               => apply_filters( 'dgwt/wcas/scripts/disable_submit', false ),
            'fixer'                        => apply_filters( 'dgwt/wcas/scripts/fixer', array(
            'broken_search_ui'                  => true,
            'broken_search_ui_ajax'             => true,
            'broken_search_ui_hard'             => false,
            'broken_search_elementor_popups'    => true,
            'broken_search_browsers_back_arrow' => true,
            'force_refresh_checkout'            => true,
        ) ),
            'voice_search_enabled'         => defined( 'DGWT_WCAS_VOICE_SEARCH_ENABLE' ) && DGWT_WCAS_VOICE_SEARCH_ENABLE,
            'voice_search_lang'            => apply_filters( 'dgwt/wcas/scripts/voice_search_lang', get_bloginfo( 'language' ) ),
        );
        if ( Multilingual::isMultilingual() ) {
            $localize['current_lang'] = Multilingual::getCurrentLanguage();
        }
        // Min characters
        $min_chars = DGWT_WCAS()->settings->getOption( 'min_chars' );
        if ( !empty($min_chars) && is_numeric( $min_chars ) ) {
            $localize['min_chars'] = absint( $min_chars );
        }
        $sug_width = DGWT_WCAS()->settings->getOption( 'sug_width' );
        if ( !empty($sug_width) && is_numeric( $sug_width ) && $sug_width > 100 ) {
            $localize['sug_width'] = absint( $sug_width );
        }
        // Show/hide Details panel
        if ( DGWT_WCAS()->settings->getOption( 'show_details_box' ) === 'on' ) {
            $localize['show_details_panel'] = true;
        }
        // Show/hide images
        if ( DGWT_WCAS()->settings->getOption( 'show_product_image' ) === 'on' ) {
            $localize['show_images'] = true;
        }
        // Show/hide price
        if ( DGWT_WCAS()->settings->getOption( 'show_product_price' ) === 'on' ) {
            $localize['show_price'] = true;
        }
        // Show/hide description
        if ( DGWT_WCAS()->settings->getOption( 'show_product_desc' ) === 'on' ) {
            $localize['show_desc'] = true;
        }
        // Show/hide description
        if ( DGWT_WCAS()->settings->getOption( 'show_product_sku' ) === 'on' ) {
            $localize['show_sku'] = true;
        }
        // Show/hide sale badge
        if ( DGWT_WCAS()->settings->getOption( 'show_sale_badge' ) === 'on' ) {
            $localize['show_sale_badge'] = true;
        }
        // Show/hide featured badge
        if ( DGWT_WCAS()->settings->getOption( 'show_featured_badge' ) === 'on' ) {
            $localize['show_featured_badge'] = true;
        }
        // Set preloader
        
        if ( DGWT_WCAS()->settings->getOption( 'show_preloader' ) === 'on' ) {
            $localize['show_preloader'] = true;
            $localize['preloader_url'] = esc_url( trim( DGWT_WCAS()->settings->getOption( 'preloader_url' ) ) );
        }
        
        // Show/hide autocomplete headings
        if ( DGWT_WCAS()->settings->getOption( 'show_grouped_results' ) === 'on' ) {
            $localize['show_headings'] = true;
        }
        return apply_filters( 'dgwt/wcas/scripts/localize', $localize );
    }
    
    /**
     * Get endpoint URL
     *
     * @param string $type
     *
     * @return string
     */
    public static function getEndpointUrl( $type = '' )
    {
        $url = '';
        if ( !in_array( $type, array( 'search', 'details', 'prices' ) ) ) {
            return $url;
        }
        switch ( $type ) {
            case 'search':
                $url = \WC_AJAX::get_endpoint( DGWT_WCAS_SEARCH_ACTION );
                break;
            case 'details':
                $url = \WC_AJAX::get_endpoint( DGWT_WCAS_RESULT_DETAILS_ACTION );
                break;
            case 'prices':
                $url = \WC_AJAX::get_endpoint( DGWT_WCAS_GET_PRICES_ACTION );
                break;
            default:
                break;
        }
        return apply_filters( "dgwt/wcas/endpoint/{$type}", $url );
    }
    
    /**
     * Checking the current code is run by the object of the given class
     *
     * @param string $class_name Class name
     * @param int $backtrace_limit The number of stack frames that is tested backwards.
     *
     * @return bool
     */
    public static function is_running_inside_class( $class_name, $backtrace_limit = 10 )
    {
        if ( empty($class_name) ) {
            return false;
        }
        if ( intval( $backtrace_limit ) <= 0 ) {
            $backtrace_limit = 10;
        }
        $result = false;
        $backtrace = self::debugBacktrace( 0, $backtrace_limit );
        if ( !empty($backtrace) ) {
            foreach ( $backtrace as $item ) {
                
                if ( isset( $item['class'] ) && $item['class'] === $class_name ) {
                    $result = true;
                    break;
                }
            
            }
        }
        return $result;
    }
    
    private static function debugBacktrace( $options, $limit )
    {
        return debug_backtrace( $options, $limit );
    }
    
    /**
     * Search products with native engine
     *
     * @param $phrase
     *
     * @return int[]
     */
    public static function searchProducts( $phrase )
    {
        $postIn = array();
        $urlPhrase = str_replace( "\\'", "'", $phrase );
        $urlPhrase = str_replace( '\\"', '"', $urlPhrase );
        $args = array(
            's'      => urlencode( $urlPhrase ),
            'remote' => 1,
        );
        if ( Multilingual::isMultilingual() ) {
            $args['l'] = Multilingual::getCurrentLanguage();
        }
        $url = add_query_arg( $args, Helpers::getAjaxSearchEndpointUrl() );
        $r = wp_remote_retrieve_body( wp_remote_get( $url, array(
            'timeout' => 120,
        ) ) );
        $decR = json_decode( $r );
        if ( json_last_error() == JSON_ERROR_NONE ) {
            if ( is_object( $decR ) && property_exists( $decR, 'suggestions' ) && is_array( $decR->suggestions ) ) {
                $postIn = wp_list_pluck( $decR->suggestions, 'ID' );
            }
        }
        return $postIn;
    }
    
    /**
     * Get all post types used in search
     *
     * @param string $filter 'no-products' returns post types not related to products
     *                       'only-products' returns post types related to products
     *
     * @return array
     */
    public static function getAllowedPostTypes( $filter = '' )
    {
        $types = array();
        
        if ( $filter !== 'no-products' ) {
            $types[] = 'product';
            $types[] = 'product-variation';
        }
        
        
        if ( $filter !== 'only-products' ) {
            if ( DGWT_WCAS()->settings->getOption( 'show_matching_posts' ) === 'on' ) {
                $types[] = 'post';
            }
            if ( DGWT_WCAS()->settings->getOption( 'show_matching_pages' ) === 'on' ) {
                $types[] = 'page';
            }
        }
        
        return apply_filters( 'dgwt/wcas/allowed_post_types', $types, $filter );
    }
    
    /**
     * Get Basic Auth header from dedicated constants or from current request
     *
     * @return string
     */
    public static function getBasicAuthHeader()
    {
        $authorization = '';
        
        if ( defined( 'DGWT_WCAS_BA_USERNAME' ) && defined( 'DGWT_WCAS_BA_PASSWORD' ) ) {
            $authorization = 'Basic ' . base64_encode( wp_unslash( DGWT_WCAS_BA_USERNAME ) . ':' . wp_unslash( DGWT_WCAS_BA_PASSWORD ) );
        } elseif ( isset( $_SERVER['PHP_AUTH_USER'] ) && isset( $_SERVER['PHP_AUTH_PW'] ) ) {
            $authorization = 'Basic ' . base64_encode( wp_unslash( $_SERVER['PHP_AUTH_USER'] ) . ':' . wp_unslash( $_SERVER['PHP_AUTH_PW'] ) );
        }
        
        return $authorization;
    }
    
    /**
     * Get AJAX search endpoint URL
     *
     * @param null $scheme
     *
     * @return string
     *
     * @see \WC_AJAX::get_endpoint() - Almost the same, but you can choose a scheme
     */
    public static function getAjaxSearchEndpointUrl( $scheme = null )
    {
        return esc_url_raw( apply_filters( 'woocommerce_ajax_get_endpoint', add_query_arg( 'wc-ajax', DGWT_WCAS_SEARCH_ACTION, remove_query_arg( array(
            'remove_item',
            'add-to-cart',
            'added-to-cart',
            'order_again',
            '_wpnonce'
        ), home_url( '/', $scheme ) ) ), DGWT_WCAS_SEARCH_ACTION ) );
    }
    
    /**
     * Check that the AMP version of the page is displayed
     *
     * @return bool
     */
    public static function isAMPEndpoint()
    {
        return function_exists( 'is_amp_endpoint' ) && is_amp_endpoint();
    }
    
    /**
     * Get the path to the fibo directory in the theme or child theme
     *
     * @param string $path
     * @param array $vars
     *
     * @return void
     */
    public static function loadTemplate( $template = '', $vars = array() )
    {
        $path = '';
        // Load default partials from the plugin
        $file = DGWT_WCAS_DIR . 'partials/' . $template;
        if ( file_exists( $file ) ) {
            $path = $file;
        }
        // Load a partial if it is localized in the child-theme
        $file = get_stylesheet_directory() . '/fibosearch/' . $template;
        if ( file_exists( $file ) ) {
            $path = $file;
        }
        $path = apply_filters(
            'dgwt/wcas/template',
            $path,
            $template,
            $vars
        );
        if ( file_exists( $path ) ) {
            include $path;
        }
    }
    
    /**
     * Add "No results" if suggestions are empty
     *
     * @param array $output
     *
     * @return array
     */
    public static function noResultsSuggestion( $output )
    {
        if ( empty($output['suggestions']) ) {
            $output['suggestions'][] = array(
                'value' => '',
                'type'  => 'no-results',
            );
        }
        return $output;
    }
    
    /**
     * Get default collate
     *
     * @param string $context
     *
     * @return string
     */
    public static function getCollate( $context = '' )
    {
        global  $wpdb ;
        $sql = '';
        $collate = '';
        $charset = '';
        
        if ( $wpdb->has_cap( 'collation' ) ) {
            if ( !empty($wpdb->charset) ) {
                $charset = $wpdb->charset;
            }
            if ( !empty($wpdb->collate) ) {
                $collate = $wpdb->collate;
            }
        }
        
        $charset = apply_filters( 'dgwt/wcas/db/charset', $charset, $context );
        $collate = apply_filters( 'dgwt/wcas/db/collation', $collate, $context );
        if ( !empty($charset) ) {
            $sql .= " DEFAULT CHARACTER SET " . $charset;
        }
        if ( !empty($collate) ) {
            $sql .= " COLLATE " . $collate;
        }
        return apply_filters( 'dgwt/wcas/db/collation/sql', $sql, $context );
    }
    
    /**
     * Check if string ends with another string
     *
     * @param string $haystack
     * @param string $needle
     *
     * @return bool
     */
    public static function endsWith( $haystack, $needle )
    {
        $length = strlen( $needle );
        return ( $length > 0 ? substr( $haystack, -$length ) === $needle : true );
    }
    
    /**
     * Get table info
     *
     * @return float[]
     */
    public static function getTableInfo( $table = '' )
    {
        global  $wpdb ;
        if ( !defined( 'DB_NAME' ) || empty($table) ) {
            return array(
                'data'  => 0.0,
                'index' => 0.0,
            );
        }
        $info = $wpdb->get_row( $wpdb->prepare( "SELECT\n\t\t\t\t\t    round( ( data_length / 1024 / 1024 ), 2 ) 'data',\n\t\t\t\t\t    round( ( index_length / 1024 / 1024 ), 2 ) 'index'\n\t\t\t\t\tFROM information_schema.TABLES\n\t\t\t\t\tWHERE table_schema = %s\n\t\t\t\t\tAND table_name = %s;", DB_NAME, $table ), ARRAY_A );
        if ( !isset( $info['data'] ) || !isset( $info['index'] ) ) {
            return array(
                'data'  => 0.0,
                'index' => 0.0,
            );
        }
        $info['data'] = floatval( $info['data'] );
        $info['index'] = floatval( $info['index'] );
        return $info;
    }
    
    /**
     * Get names of all FiboSearch options
     *
     * @return array
     */
    public static function getAllOptionNames()
    {
        global  $wpdb ;
        $options = array();
        $res = $wpdb->get_col( "SELECT SQL_NO_CACHE option_name FROM {$wpdb->options} WHERE option_name LIKE 'dgwt_wcas_%'" );
        if ( !empty($res) && is_array( $res ) ) {
            $options = $res;
        }
        return $options;
    }

}