<?php
/**
 * Functions which enhance the theme by hooking into WordPress
 *
 * @package Godhuli
 */

/**
 * Adds custom classes to the array of body classes.
 *
 * @param array $classes Classes for the body element.
 * @return array
 */
function godhuli_body_classes( $classes ) {
	// Adds a class of hfeed to non-singular pages.
	if ( ! is_singular() ) {
		$classes[] = 'hfeed';
	}

	// Adds a class of no-sidebar when there is no sidebar present.
	if ( ! is_active_sidebar( 'godhuli-default-sidebar' ) ) {
		$classes[] = 'no-sidebar';
	}

	if ( 'right' !== get_theme_mod( 'single_post_layout' ) ) {
		$classes[] = 'full-width-contain';
	}

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

	// Check whether we're singular.
	if ( is_singular() ) {
		$classes[] = 'singular';
	}

	// Check for post thumbnail.
	if ( is_singular() && has_post_thumbnail() ) {
		$classes[] = 'has-post-thumbnail';
	} elseif ( is_singular() ) {
		$classes[] = 'missing-post-thumbnail';
	}

	// Check whether we're in the customizer preview.
	if ( is_customize_preview() ) {
		$classes[] = 'customizer-preview';
	}

	// Check if posts have single pagination.
	if ( is_single() && ( get_next_post() || get_previous_post() ) ) {
		$classes[] = 'has-single-pagination';
	} else {
		$classes[] = 'has-no-pagination';
	}

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


/**
 * Add a pingback url auto-discovery header for single posts, pages, or attachments.
 */
function godhuli_pingback_header() {
	if ( is_singular() && pings_open() ) {
		printf( '<link rel="pingback" href="%s">', esc_url( get_bloginfo( 'pingback_url' ) ) );
	}
}
add_action( 'wp_head', 'godhuli_pingback_header' );
