functions.php

<?php

/**
 * functions.php
 *
 * This is a special file that WordPress looks for in the theme folder. It
 * contains all of the functions that power the theme.
 *
 * Learn More
 *
 * https://developer.wordpress.org/themes/basics/theme-functions/
 *
 **/

// Check for Waymark
if (!class_exists('Waymark_Helper')) {
	// Admin
	if (is_admin() && current_user_can('manage_options')) {
		// Display admin notice
		add_action('admin_notices', function () {
			echo '<div class="error"><p>';

			// Plugin exists, but is not active
			if (file_exists(WP_PLUGIN_DIR . '/waymark/Waymark.php')) {
				$activate_url = wp_nonce_url(admin_url('plugins.php?action=activate&plugin=waymark/Waymark.php'), 'activate-plugin_waymark/Waymark.php');

				echo '<b>Map First</b> requires <a href="https://www.waymark.dev/">Waymark</a> | <a href="' . $activate_url . '">Activate &raquo;</a>.';
				//	Plugin not installed
			} else {
				$install_url = wp_nonce_url(admin_url('update.php?action=install-plugin&plugin=waymark'), 'install-plugin_waymark');

				echo '<b>Map First</b> requires <a href="https://www.waymark.dev/">Waymark</a> | <a href="' . $install_url . '">Install &raquo;</a>.';
			}

			echo '</p></div>';
		});
		// Front
	} else {
		die('<h1>Map First requires <a href="https://www.waymark.dev/">Waymark</a>!</h1>');
	}
}

// Theme assets
function map_first_enqueue_assets() {
	wp_enqueue_style('map-first', get_template_directory_uri() . '/dist/map-first.css');
	wp_enqueue_script('map-first', get_template_directory_uri() . '/dist/map-first.js', [], false, true);
}
add_action('wp_enqueue_scripts', 'map_first_enqueue_assets');

function map_first_pre_get_posts($query) {
	if (is_archive() && is_tax('waymark_collection')) {
		$query->set('order', 'ASC');
	}
}
add_action('pre_get_posts', 'map_first_pre_get_posts');

function map_first_customize_register($wp_customize) {
	$wp_customize->add_section('map_first_section', array(
		'title' => 'Map First',
	));

	$wp_customize->add_setting('map_first_header_logo', array(
		'default' => '',
		'transport' => 'refresh',
		'sanitize_callback' => 'esc_url_raw',
	));

	$wp_customize->add_control(new WP_Customize_Image_Control($wp_customize, 'map_first_header_logo', array(
		'label' => 'Header Logo Image',
		'section' => 'map_first_section',
	)));

	$wp_customize->add_setting('map_first_body_background', array(
		'default' => '#eeeeee',
		'transport' => 'refresh',
		'sanitize_callback' => 'sanitize_hex_color',
	));

	$wp_customize->add_control('map_first_body_background', array(
		'label' => 'Page Background Colour',
		'section' => 'map_first_section',
		'type' => 'color',
	));

	$wp_customize->add_setting('map_first_body_color', array(
		'default' => '#111111',
		'transport' => 'refresh',
		'sanitize_callback' => 'sanitize_hex_color',
	));

	$wp_customize->add_control('map_first_body_color', array(
		'label' => 'Page Text Colour',
		'section' => 'map_first_section',
		'type' => 'color',
	));

	$wp_customize->add_setting('map_first_header_background', array(
		'default' => '#212529',
		'transport' => 'refresh',
		'sanitize_callback' => 'sanitize_hex_color',
	));

	$wp_customize->add_control('map_first_header_background', array(
		'label' => 'Header Background Colour',
		'section' => 'map_first_section',
		'type' => 'color',
	));

	$wp_customize->add_setting('map_first_header_color', array(
		'default' => '#fff',
		'transport' => 'refresh',
		'sanitize_callback' => 'sanitize_hex_color',
	));

	$wp_customize->add_control('map_first_header_color', array(
		'label' => 'Header Text Colour',
		'section' => 'map_first_section',
		'type' => 'color',
	));

	$wp_customize->add_setting('map_first_link_color', array(
		'default' => '#0056b3',
		'transport' => 'refresh',
		'sanitize_callback' => 'sanitize_hex_color',
	));

	$wp_customize->add_control('map_first_link_color', array(
		'label' => 'Content Link Colour',
		'section' => 'map_first_section',
		'type' => 'color',
	));
}
add_action('customize_register', 'map_first_customize_register');

function map_first_widgets() {
	register_sidebar(array(
		'name' => 'Map First Header Content',
		'id' => 'map-first-header-content',
		'before_widget' => '<div>',
		'after_widget' => '</div>',
		'before_title' => '<h4 class="text-white">',
		'after_title' => '</h4>',
	));

	register_sidebar(array(
		'name' => 'Map First Footer Content',
		'id' => 'map-first-footer-content',
		'before_widget' => '<div>',
		'after_widget' => '</div>',
	));
}
add_action('widgets_init', 'map_first_widgets');

function map_first_menu() {
	register_nav_menu('map-first-header-nav', 'Map First Header Nav');
}
add_action('init', 'map_first_menu');

function map_first_breadcrumb() {
	global $post;

	if ($post) {
		$crumbs = array();

		switch (true) {
		// ========= Home  =========
		case is_front_page():

			break;

		// ========= Taxonomy  =========
		case is_archive():
			$tax = get_queried_object();
			if (isset($tax->name)) {
				$crumbs[] = array(
					'prepend' => ' Maps / ',
					'text' => $tax->name,
				);
			}

			break;

		// ========= Map  =========
		case is_singular('waymark_map'):
			//Collections
			$collections = wp_get_post_terms($post->ID, 'waymark_collection');

			//If we have Collections
			if (sizeof($collections)) {
				//Sort by count ASC
				usort($collections, function ($a, $b) {
					return $a->count < $b->count;
				});

				$crumbs[] = array(
					// 'prepend' => ' Map / ',
					'text' => $collections[0]->name,
					'link' => get_term_link($collections[0]),
				);
			}

			//Map Title
			$crumbs[] = array(
				'text' => get_the_title(),
			);

			break;
		// ========= Posts / Pages  =========
		case is_page():
		case is_single():
			//Ancestors?
			if ($post->post_parent) {
				$ancestors = get_post_ancestors($post);
				$ancestors = array_reverse($ancestors);

				foreach ($ancestors as $ancestor) {
					$crumbs[] = array(
						'text' => get_the_title($ancestor),
						'link' => get_permalink($ancestor),
					);
				}
			}

			//Map Title
			$crumbs[] = array(
				'text' => get_the_title(),
			);

			break;
		}

		//Do we have something to display?
		if (sizeof($crumbs)) {
			echo '<span vocab="https://schema.org/" typeof="BreadcrumbList">' . "\n";

			$position = 1;
			foreach ($crumbs as $crumb) {
				$prepend = isset($crumb['prepend']) ? $crumb['prepend'] : '';
				$append = isset($crumb['append']) ? $crumb['append'] : '';
				$text = isset($crumb['text']) ? $crumb['text'] : '';

				echo '	/' . "\n";
				echo '	<span property="itemListElement" typeof="ListItem">' . "\n";
				echo $prepend;
				if (isset($crumb['link'])) {
					echo '		<a property="item" typeof="WebPage" href="' . $crumb['link'] . '">' . "\n";
				}
				echo '			<span property="name">' . $text . $append . '</span>' . "\n";
				if (isset($crumb['link'])) {
					echo '		</a>' . "\n";
				}
				echo $append;
				echo '		<meta property="position" content="' . $position . '" />' . "\n";
				echo '	</span>' . "\n";
			}

			echo '	</span>' . "\n";
		}

		//Children?
		if (is_front_page()) {
			$post_children = get_posts(array(
				'post_type' => 'page',
				'post_parent' => '0',
				// Exclude home itself
				'exclude' => get_option('page_on_front'),
			));
		} else {
			$post_children = get_posts(array(
				'post_type' => $post->post_type,
				'post_parent' => $post->ID,
			));
		}

		if ($post_children) {
			echo '	/' . "\n";
			echo '<select id="breadcrumb-nav">' . "\n";
			echo '	<option selected="selected">...</option>' . "\n";
			foreach ($post_children as $child) {
				//No home
				if ($child->ID != get_option('page_on_front')) {
					echo '	<option value="' . get_permalink($child->ID) . '">' . $child->post_title . '</option>' . "\n";
				}
			}
			echo '</select>' . "\n";
		}

	}
}

//Thanks! https://njengah.com/wordpress-custom-pagination/
function map_first_archive_pagination() {
	global $wp_query;

	$big = 9999999;
	$pagination_list = paginate_links(array(
		'base' => str_replace($big, '%#%', esc_url(get_pagenum_link($big))),
		'format' => '?paged=%#%',
		'current' => max(1, get_query_var('paged')),
		'total' => $wp_query->max_num_pages,
		'type' => 'array',
		'prev_text' => '&lt;',
		'next_text' => '&gt;',
	));

	//If we have a list
	if (isset($pagination_list) && sizeof($pagination_list)) {
		//Format for Bootstrap
		echo '<ul class="pagination justify-content-center mt-5">' . "\n";

		$count = 0;
		foreach ($pagination_list as $link) {
			$class = 'page-item';
			if (strpos($link, '<span') !== false) {
				$class .= ' active';
			}
			echo '<li class="' . $class . '">' . "\n";

			$bad = array(
				'page-numbers',
			);
			$good = array(
				'page-link',
			);
			echo str_replace($bad, $good, $link);

			echo '</li>' . "\n";
		}

		echo '</ul>' . "\n";
	}
}

function map_first_single_pagination() {
	//Format for Bootstrap
	echo '<ul class="pagination justify-content-center mt-5">' . "\n";

	echo '	<li class="page-item">' . "\n";
	$link = get_previous_post_link('%link', '&lt; %title', true, '', 'waymark_collection');
	echo str_replace('<a', '<a class="page-link"', $link);
	echo '	</li>' . "\n";

	echo '	<li class="page-item">' . "\n";
	$link = get_next_post_link('%link', '%title &gt;', true, '', 'waymark_collection');
	echo str_replace('<a', '<a class="page-link"', $link);
	echo '	</li>' . "\n";

	echo '</ul>' . "\n";
}