extras.php

<?php
/**
 * Custom functions that act independently of the theme templates.
 *
 * Eventually, some of the functionality here could be replaced by core features.
 *
 * @package polestar
 * @license GPL 2.0 
 */

/**
 * Adds custom classes to the array of body classes.
 *
 * @param array $classes Classes for the body element.
 * @return array
 */
function polestar_body_classes( $classes ) {

	// Mobile compatibility classes.
	$classes[] = 'css3-animations';
	$classes[] = 'no-js';
	$classes[] = 'no-touch';

	// Non-singlar pages.
	if ( ! is_singular() ) {
		$classes[] = 'hfeed';
	}

	// Add the page setting classes.
	$page_settings = puro_page_setting();

	if ( ! empty( $page_settings ) ) {
		if ( ! empty( $page_settings['layout'] ) ) $classes[] = 'page-layout-' . $page_settings['layout'];
		if ( ! empty( $page_settings['overlap'] ) && ( $page_settings['overlap'] != 'disabled' ) ) $classes[] = 'overlap-' . $page_settings['overlap'];
		if ( empty( $page_settings['header_margin'] ) ) $classes[] = 'no-header-margin';
		if ( empty( $page_settings['footer_margin'] ) ) $classes[] = 'no-footer-margin';
	}

	// Header margin.
	if ( is_home() && polestar_has_featured_posts() ) {
		$classes[] = 'no-header-margin';
	}

	// Sidebar.
	if ( is_active_sidebar( 'sidebar-main' ) && ! is_404() && ! ( function_exists( 'is_woocommerce' ) && is_woocommerce() ) ) {
		$classes[] = 'sidebar';
	}

	// Sidebar left.
	if ( get_theme_mod( 'sidebar_position' ) == 'left' && ! is_404() && $page_settings['layout'] != "constrained" && ! ( function_exists( 'is_woocommerce' ) && is_woocommerce() ) ) {
		$classes[] = 'sidebar-left';
	}

	// WooCommerce sidebar.
	if ( is_active_sidebar( 'sidebar-shop' ) && ( function_exists( 'is_woocommerce' ) && is_woocommerce() && ! is_product() ) ) {
		$classes[] = 'woocommerce-sidebar';

		if ( get_theme_mod( 'woocommerce_sidebar_position' ) == 'right' ) {
			$classes[] = 'woocommerce-sidebar-right';
		}
	}

	// WooCommerce top bar.
	if ( function_exists( 'is_woocommerce' ) && ! is_store_notice_showing() ) {
		$classes[] = 'no-topbar';
	} elseif ( ! class_exists( 'Woocommerce' ) ) {
		$classes[] = 'no-topbar';
	}

	// WooCommerce columns.
	if ( function_exists( 'is_woocommerce' ) && is_woocommerce() ) {
		$classes[] = 'columns-' . get_theme_mod( 'archive_columns', 3 );
	}

	return $classes;
}
add_filter( 'body_class', 'polestar_body_classes' );

/**
 * Add a pingback url auto-discovery header for singularly identifiable articles.
 */
function polestar_pingback_header() {
	if ( is_singular() && pings_open() ) {
		echo '<link rel="pingback" href="', esc_url( get_bloginfo( 'pingback_url' ) ), '">';
	}
}
add_action( 'wp_head', 'polestar_pingback_header' );

if ( ! function_exists( 'polestar_unset_current_menu_class' ) ) :
/**
 * Unset the current menu class.
 */
function polestar_unset_current_menu_class( $classes ) {
	$disallowed_class_names = array(
		'current-menu-item',
		'current_page_item',
	);
	foreach ( $classes as $class ) {
		if ( in_array( $class, $disallowed_class_names ) ) {
			$key = array_search( $class, $classes );
			if ( false !== $key ) {
				unset( $classes[$key] );
			}
		}
	}
	return $classes;
}
endif;
add_filter( 'nav_menu_css_class', 'polestar_unset_current_menu_class', 10, 1 );

if ( ! function_exists( 'polestar_post_class_filter' ) ) :
/**
* Filter post classes.
* @link https://codex.wordpress.org/Function_Reference/post_class.
*/
function polestar_post_class_filter( $classes ) {
	$classes[] = 'post';

	// Resolves structured data issue in core. See https://core.trac.wordpress.org/ticket/28482.
	if ( is_page() ) {
		$class_key = array_search( 'hentry', $classes );

		if ( $class_key !== false) {
			unset( $classes[ $class_key ] );
		}
	}

	$classes = array_unique( $classes );
	return $classes;
}
endif;
add_filter( 'post_class', 'polestar_post_class_filter' );

if ( ! function_exists( 'polestar_premium_setup' ) ) :
/**
 * Polestar upsell notice.
 */
function polestar_upsell_notice() {
	wp_enqueue_script( 'polestar-customizer-upsell', get_template_directory_uri() . '/js/polestar-upsell.js', array(), '1.0.0', true );
	wp_localize_script(
		'polestar-customizer-upsell',
		'polestar10n',
		array(
			'polestarURL'   => esc_html__( 'https://purothemes.com/themes/polestar/', 'polestar' ),
			'polestarLabel' => esc_html__( 'Buy Premium Version', 'polestar' ),
		)
	);
}
add_action( 'customize_controls_enqueue_scripts', 'polestar_upsell_notice' );
endif;

/**
 * Add our SiteOrigin Premium affiliate ID.
 */
function polestar_siteorigin_premium( $id ) {
	return 1;
}
add_filter( 'siteorigin_premium_affiliate_id', 'polestar_siteorigin_premium' );