functions.php

<?php

// Include files.
require_once( STYLESHEETPATH . '/includes/filters.php' );
require_once( STYLESHEETPATH . '/includes/shortcodes.php' );

/**
 * Sets up theme defaults and registers
 * support for various WordPress features.
 *
 * @since 1.0.0
 */
function wpcampus_2016_theme_setup() {

	// Make theme available for translation.
	load_theme_textdomain( 'wpcampus', get_stylesheet_directory() . '/languages' );

	// Enable network components.
	if ( function_exists( 'wpcampus_network_enable' ) ) {
		wpcampus_network_enable( array( 'coc', 'footer' ) );
	}

	// Add default posts and comments RSS feed links to head.
	add_theme_support( 'automatic-feed-links' );

	// Let WordPress manage the document title.
	add_theme_support( 'title-tag' );

	// Enable support for Post Thumbnails on posts and pages.
	add_theme_support( 'post-thumbnails' );

	// Switch default core markup for search form, comment form, and comments to output valid HTML5.
	add_theme_support( 'html5', array(
		'search-form',
		'comment-form',
		'comment-list',
		'gallery',
		'caption',
	));
}
add_action( 'after_setup_theme', 'wpcampus_2016_theme_setup' );

/**
 * Register sidebars.
 */
function wpcampus_2016_register_sidebars() {

	// Register home sidebar.
	register_sidebar( array(
		'name'			=> 'Home Sidebar',
		'id'			=> 'home-sidebar',
		'description' 	=> '',
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
		'after_widget'  => '</div>',
		'before_title'  => '<h2 class="sidebar-title">',
		'after_title'   => '</h2>',
	));

	// Register main sidebar.
	register_sidebar( array(
		'name'			=> 'Main Sidebar',
		'id'			=> 'main-sidebar',
		'description' 	=> '',
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
		'after_widget'  => '</div>',
		'before_title'  => '<h2 class="sidebar-title">',
		'after_title'   => '</h2>',
	));

	// Register sponsors sidebar.
	register_sidebar( array(
		'name'			=> 'Sponsors Sidebar',
		'id'			=> 'sponsors-sidebar',
		'description' 	=> '',
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
		'after_widget'  => '</div>',
		'before_title'  => '<h2 class="sidebar-title">',
		'after_title'   => '</h2>',
	));
}
add_action( 'widgets_init', 'wpcampus_2016_register_sidebars' );

/**
 * Make sure the Open Sans
 * font weights we need are added.
 */
function wpcampus_2016_load_open_sans_weights( $weights ) {
	return array_merge( $weights, array( 300, 400, 600 ) );
}
add_filter( 'wpcampus_open_sans_font_weights', 'wpcampus_2016_load_open_sans_weights' );

/**
 * Enqueues scripts and styles.
 */
function wpcampus_2016_enqueue_scripts() {

	$theme_dir = get_template_directory();
	$theme_dir_uri = get_stylesheet_directory_uri();

	// Add our theme stylesheet.
	// wpc-fonts-open-sans is registered in the network plugin.
	wp_enqueue_style( 'wpcampus-2016', $theme_dir_uri . '/assets/css/styles.css', array( 'wpc-fonts-open-sans' ), filemtime( $theme_dir . '/assets/css/styles.css' ) );

	// Add our theme script.
	wp_enqueue_script( 'wpcampus-2016', $theme_dir_uri . '/assets/js/wpcampus-2016.min.js', array( 'jquery' ), filemtime( $theme_dir . '/assets/js/wpcampus-2016.min.js' ) );

	// Add our home styles.
	if ( is_front_page() ) {
		wp_enqueue_style( 'wpcampus-2016-home', $theme_dir_uri . '/assets/css/home.css', array( 'wpcampus-2016' ), filemtime( $theme_dir . '/assets/css/home.css' ) );
	}

	// Add our iframe script.
	if ( is_page_template( 'template-map.php' ) ) {
		wp_enqueue_script( 'wpcampus-2016-iframe', $theme_dir_uri . '/assets/js/wpcampus-2016-iframe.min.js', array( 'jquery' ), filemtime( $theme_dir . '/assets/js/wpcampus-2016-iframe.min.js' ) );
	}

	// Register handlebars.
	wp_register_script( 'handlebars', '//cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.5/handlebars.min.js' );

	// Get the API route.
	$wp_rest_api_route = function_exists( 'rest_get_url_prefix' ) ? rest_get_url_prefix() : '';
	if ( ! empty( $wp_rest_api_route ) ) {
		$wp_rest_api_route = "/{$wp_rest_api_route}/wp/v2/";
	}

	// For the livestream page.
	if ( is_page_template( 'template-livestream.php' ) ) {

		// Enqueue the schedule script.
		wp_enqueue_script( 'wpcampus-2016-livestream', $theme_dir_uri . '/assets/js/wpcampus-2016-livestream.min.js', array(
			'jquery',
			'handlebars',
		), false, true );

		// Pass some data.
		wp_localize_script( 'wpcampus-2016-livestream', 'wpc_ls', array(
			'wp_api_route'  => $wp_rest_api_route,
		));
	}
}
add_action( 'wp_enqueue_scripts', 'wpcampus_2016_enqueue_scripts', 20 );

/**
 * Get the post type archive title.
 */
function wpcampus_get_post_type_archive_title( $post_type = '' ) {

	// Make sure we have a post type.
	if ( ! $post_type ) {
		$post_type = get_query_var( 'post_type' );
	}

	// Get post type archive title.
	if ( $post_type ) {

		// Make sure its not an array.
		if ( is_array( $post_type ) ) {
			$post_type = reset( $post_type );
		}

		// Get the post type data.
		if ( $post_type_obj = get_post_type_object( $post_type ) ) {

			// Get the title.
			$title = apply_filters( 'post_type_archive_title', $post_type_obj->labels->name, $post_type );

			// Return the title.
			return apply_filters( 'wpcampus_post_type_archive_title', $title, $post_type );

		}
	}
	return null;
}

/**
 * Get breadcrumbs.
 */
function wpcampus_get_breadcrumbs_html() {

	// Build array of breadcrumbs.
	$breadcrumbs = array();

	// Not for front page.
	if ( is_front_page() ) {
		return false;
	}

	// Get post type.
	$post_type = get_query_var( 'post_type' );

	// Make sure its not an array.
	if ( is_array( $post_type ) ) {
		$post_type = reset( $post_type );
	}

	// Add home.
	$breadcrumbs[] = array(
		'url'   => '/',
		'label' => __( 'Home', 'wpcampus' ),
	);

	// Add archive(s).
	if ( is_archive() ) {

		// Add the archive breadcrumb.
		if ( is_post_type_archive() ) {

			// Add crumb to schedule page.
			if ( is_post_type_archive( 'speakers' ) ) {
				$breadcrumbs[] = array(
					'url'   => '/schedule/',
					'label' => __( 'Schedule', 'wpcampus' ),
				);
			}

			// Get the info.
			$post_type_archive_link = get_post_type_archive_link( $post_type );
			$post_type_archive_title = wpcampus_get_post_type_archive_title( $post_type );

			// Add the breadcrumb.
			if ( $post_type_archive_link && $post_type_archive_title ) {
				$breadcrumbs[] = array(
					'url' 	=> $post_type_archive_link,
					'label' => $post_type_archive_title,
				);
			}
		}
	} else {

		// Add links to archive.
		if ( is_singular() ) {

			// Get the information.
			$post_type_archive_link = get_post_type_archive_link( $post_type );
			$post_type_archive_title = wpcampus_get_post_type_archive_title( $post_type );

			if ( $post_type_archive_link ) {
				$breadcrumbs[] = array(
					'url'	=> $post_type_archive_link,
					'label'	=> $post_type_archive_title,
				);
			}
		}

		// Print info for the current post.
		$post = get_queried_object();
		if ( $post && is_a( $post, 'WP_Post' ) ) {

			// Get ancestors.
			$post_ancestors = isset( $post ) ? get_post_ancestors( $post->ID ) : array();

			// Add the ancestors.
			foreach ( $post_ancestors as $post_ancestor_id ) {

				// Add ancestor.
				$breadcrumbs[] = array(
					'ID' 	=> $post_ancestor_id,
					'url' 	=> get_permalink( $post_ancestor_id ),
					'label' => get_the_title( $post_ancestor_id ),
				);
			}

			// Add current page - if not home page.
			if ( isset( $post ) ) {
				$breadcrumbs['current'] = array(
					'ID'	=> $post->ID,
					'url'	=> get_permalink( $post ),
					'label'	=> get_the_title( $post->ID ),
				);
			}
		}
	}

	// Filter the breadcrumbs.
	$breadcrumbs = apply_filters( 'wpcampus_2016_breadcrumbs', $breadcrumbs );

	// Build breadcrumbs HTML.
	$breadcrumbs_html = null;

	foreach ( $breadcrumbs as $crumb_key => $crumb ) {

		// Make sure we have what we need.
		if ( empty( $crumb['label'] ) ) {
			continue;
		}

		// If no string crumb key, set as ancestor.
		if ( ! $crumb_key || is_numeric( $crumb_key ) ) {
			$crumb_key = 'ancestor';
		}

		// Setup classes.
		$crumb_classes = array( $crumb_key );

		// Add if current.
		if ( isset( $crumb['current'] ) && $crumb['current'] ) {
			$crumb_classes[] = 'current';
		}

		$breadcrumbs_html .= '<li' . ( ! empty( $crumb_classes ) ? ' class="' . implode( ' ', $crumb_classes ) . '"' : null ) . '>';

		// Add URL and label.
		if ( ! empty( $crumb['url'] ) ) {
			$breadcrumbs_html .= '<a href="' . $crumb['url'] . '"' . ( ! empty( $crumb['title'] ) ? ' title="' . $crumb['title'] . '"' : null ) . '>' . $crumb['label'] . '</a>';
		} else {
			$breadcrumbs_html .= $crumb['label'];
		}

		$breadcrumbs_html .= '</li>';

	}

	// Wrap them in nav.
	$breadcrumbs_html = '<div class="breadcrumbs-wrapper"><nav class="breadcrumbs" aria-label="breadcrumbs"><ul>' . $breadcrumbs_html . '</ul></nav></div>';

	//  We change up the variable so it doesn't interfere with global variable.
	return $breadcrumbs_html;
}

/**
 * Decide which main callout to print.
 */
function wpcampus_2016_print_main_callout() {
	//wpcampus_2016_print_2017_callout();
}

/**
 * Print the 2017 callout.
 */
function wpcampus_2016_print_2017_callout() {

	?>
	<div class="callout secondary" style="text-align:center;">
		<h2>WPCampus 2017 Conference on July 14-15</h2>
		<p><a href="https://2017.wpcampus.org/" style="color:inherit;">WPCampus 2017</a> will take place July 14-15 on the campus of Canisius College in Buffalo, New York. <strong>Ticket sales have closed</strong> but, if you can't join us in person, all sessions will be live-streamed and made available online after the event. Gather with other WordPress users on your campus and create your own WPCampus experience!</p>
		<a class="button expand" style="display:block;" href="https://2017.wpcampus.org/">Visit the WPCampus 2017 website</a>
	</div>
	<?php
}

/**
 * Print the ed survey callout.
 */
function wpcampus_2016_print_ed_survey_callout() {

	?>
	<div class="callout secondary" style="text-align:center;">
		<h2>The "WordPress in Education" Survey</h2>
		<p>After an overwhelming response to our 2016 survey, WPCampus is back this year to dig a little deeper on key topics that schools and campuses care about most when it comes to WordPress and website development. We’d love to include your feedback in our results this year. The larger the data set, the more we all benefit. <strong>The survey will close on June 23rd, 2017.</strong></p>
		<a class="button expand" style="display:block;" href="https://2017.wpcampus.org/announcements/wordpress-in-education-survey/">Take the "WordPress in Education" survey</a>
	</div>
	<?php
}