<?php
/**
 * Infinite Scroll Theme Assets
 *
 * Register support for Twenty Fourteen.
 *
 * @package jetpack
 */

use Automattic\Jetpack\Device_Detection\User_Agent_Info;

/**
 * Add theme support for infinite scroll
 */
function jetpack_twentyfourteen_infinite_scroll_init() {
	add_theme_support(
		'infinite-scroll',
		array(
			'container'      => 'content',
			'footer'         => 'page',
			'footer_widgets' => jetpack_twentyfourteen_has_footer_widgets(),
		)
	);
}
add_action( 'after_setup_theme', 'jetpack_twentyfourteen_infinite_scroll_init' );

/**
 * Switch to the "click to load" type IS with the following cases
 * 1. Viewed from iPad and the primary sidebar is active.
 * 2. Viewed from mobile and either the primary or the content sidebar is active.
 * 3. The footer widget is active.
 *
 * @return bool
 */
function jetpack_twentyfourteen_has_footer_widgets() {
	if ( function_exists( 'jetpack_is_mobile' ) ) {
		if ( ( User_Agent_Info::is_ipad() && is_active_sidebar( 'sidebar-1' ) )
			|| ( jetpack_is_mobile( '', true ) && ( is_active_sidebar( 'sidebar-1' ) || is_active_sidebar( 'sidebar-2' ) ) )
			|| is_active_sidebar( 'sidebar-3' ) ) {

			return true;
		}
	}

	return false;
}

/**
 * Enqueue CSS stylesheet with theme styles for Infinite Scroll.
 */
function jetpack_twentyfourteen_infinite_scroll_enqueue_styles() {
	if ( wp_script_is( 'the-neverending-homepage' ) ) {
		wp_enqueue_style( 'infinity-twentyfourteen', plugins_url( 'twentyfourteen.css', __FILE__ ), array( 'the-neverending-homepage' ), '20131118' );
	}
}
add_action( 'wp_enqueue_scripts', 'jetpack_twentyfourteen_infinite_scroll_enqueue_styles', 25 );