Sven Steinert
41e4f5b591
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359 lines
11 KiB
PHP
359 lines
11 KiB
PHP
<?php
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if (!defined('ABSPATH')) exit;
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function juconnect_setup() {
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add_theme_support('title-tag');
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add_theme_support('post-thumbnails');
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add_theme_support('site-icon');
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add_theme_support('custom-logo', [
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'height' => 120,
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'width' => 120,
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'flex-height' => true,
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'flex-width' => true,
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]);
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register_nav_menus([
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'primary' => __('Primary Navigation', 'juconnect'),
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'footer' => __('Footer Navigation', 'juconnect'),
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]);
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}
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add_action('after_setup_theme', 'juconnect_setup');
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/**
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* Fallback favicon when no Site Icon is set in WordPress.
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*/
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function juconnect_favicon_fallback() {
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if (has_site_icon()) {
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return;
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}
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$icon_light_mode = get_template_directory_uri() . '/assets/img/juconnect_icon.svg';
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$icon_dark_mode = get_template_directory_uri() . '/assets/img/juconnect_icon_light.svg';
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// Use the light icon in dark browser UI and the default icon in light UI.
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echo '<link rel="icon" href="' . esc_url($icon_light_mode) . '" media="(prefers-color-scheme: light)" type="image/svg+xml" />' . "\n";
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echo '<link rel="icon" href="' . esc_url($icon_dark_mode) . '" media="(prefers-color-scheme: dark)" type="image/svg+xml" />' . "\n";
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echo '<link rel="icon" href="' . esc_url($icon_light_mode) . '" type="image/svg+xml" />' . "\n";
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}
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add_action('wp_head', 'juconnect_favicon_fallback');
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/**
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* Avoid duplicate SEO tags when a dedicated SEO plugin is active.
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*/
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function juconnect_has_external_seo_plugin() {
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return (
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class_exists('WPSEO_Frontend') || // Yoast SEO
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defined('RANK_MATH_VERSION') || // Rank Math
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defined('AIOSEO_VERSION') || // All in One SEO
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defined('SEOPRESS_VERSION') || // SEOPress
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defined('THE_SEO_FRAMEWORK_VERSION')
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);
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}
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function juconnect_get_meta_description() {
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$description = '';
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if (is_front_page() || is_home()) {
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$description = get_bloginfo('description', 'display');
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} elseif (is_singular()) {
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if (has_excerpt()) {
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$description = get_the_excerpt();
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} else {
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$content = get_post_field('post_content', get_queried_object_id());
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$description = wp_strip_all_tags(strip_shortcodes((string) $content));
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}
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} elseif (is_category() || is_tag() || is_tax()) {
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$description = wp_strip_all_tags(term_description());
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} elseif (is_post_type_archive()) {
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$description = wp_strip_all_tags(get_the_archive_description());
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}
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if ($description === '') {
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$description = get_bloginfo('description', 'display');
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}
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$description = preg_replace('/\s+/', ' ', trim((string) $description));
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return wp_html_excerpt($description, 155, '...');
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}
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function juconnect_get_canonical_url() {
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$paged = max(1, (int) get_query_var('paged'));
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if (is_404()) {
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return '';
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}
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if (is_singular()) {
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if (function_exists('wp_get_canonical_url')) {
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$canonical = wp_get_canonical_url();
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if ($canonical) {
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return $canonical;
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}
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}
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return get_permalink();
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}
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if (is_front_page()) {
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if ($paged > 1) {
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return get_pagenum_link($paged);
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}
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return home_url('/');
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}
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if (is_home()) {
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if ($paged > 1) {
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return get_pagenum_link($paged);
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}
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$posts_page_id = (int) get_option('page_for_posts');
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if ($posts_page_id > 0) {
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return get_permalink($posts_page_id);
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}
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}
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return get_pagenum_link($paged);
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}
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function juconnect_get_social_image_url() {
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if (is_singular() && has_post_thumbnail()) {
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$image = wp_get_attachment_image_url(get_post_thumbnail_id(), 'full');
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if ($image) {
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return $image;
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}
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}
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if (has_site_icon()) {
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$site_icon = get_site_icon_url(512);
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if ($site_icon) {
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return $site_icon;
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}
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}
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return get_template_directory_uri() . '/assets/img/juconnect_icon.svg';
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}
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function juconnect_output_seo_meta() {
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if (juconnect_has_external_seo_plugin() || is_feed()) {
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return;
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}
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$title = wp_get_document_title();
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$description = juconnect_get_meta_description();
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$canonical = juconnect_get_canonical_url();
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$site_name = get_bloginfo('name', 'display');
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$locale = str_replace('-', '_', get_locale());
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$og_type = is_singular('post') ? 'article' : 'website';
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$social_image = juconnect_get_social_image_url();
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if ($description !== '') {
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echo '<meta name="description" content="' . esc_attr($description) . '" />' . "\n";
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}
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// Core prints singular canonicals already via rel_canonical.
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if (!is_singular() && $canonical !== '') {
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echo '<link rel="canonical" href="' . esc_url($canonical) . '" />' . "\n";
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}
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echo '<meta property="og:locale" content="' . esc_attr($locale) . '" />' . "\n";
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echo '<meta property="og:type" content="' . esc_attr($og_type) . '" />' . "\n";
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echo '<meta property="og:title" content="' . esc_attr($title) . '" />' . "\n";
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if ($description !== '') {
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echo '<meta property="og:description" content="' . esc_attr($description) . '" />' . "\n";
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}
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if ($canonical !== '') {
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echo '<meta property="og:url" content="' . esc_url($canonical) . '" />' . "\n";
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}
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echo '<meta property="og:site_name" content="' . esc_attr($site_name) . '" />' . "\n";
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if ($social_image !== '') {
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echo '<meta property="og:image" content="' . esc_url($social_image) . '" />' . "\n";
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}
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echo '<meta name="twitter:card" content="' . esc_attr($social_image !== '' ? 'summary_large_image' : 'summary') . '" />' . "\n";
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echo '<meta name="twitter:title" content="' . esc_attr($title) . '" />' . "\n";
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if ($description !== '') {
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echo '<meta name="twitter:description" content="' . esc_attr($description) . '" />' . "\n";
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}
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if ($social_image !== '') {
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echo '<meta name="twitter:image" content="' . esc_url($social_image) . '" />' . "\n";
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}
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}
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add_action('wp_head', 'juconnect_output_seo_meta', 5);
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function juconnect_robots_directives($robots) {
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if (juconnect_has_external_seo_plugin()) {
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return $robots;
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}
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if (get_option('blog_public') === '0') {
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return [
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'noindex' => true,
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'nofollow' => true,
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];
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}
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if (is_search() || is_404() || is_attachment()) {
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unset($robots['index']);
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$robots['noindex'] = true;
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}
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return $robots;
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}
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add_filter('wp_robots', 'juconnect_robots_directives');
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function juconnect_output_json_ld() {
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if (juconnect_has_external_seo_plugin() || is_feed()) {
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return;
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}
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$home_url = home_url('/');
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$site_name = get_bloginfo('name', 'display');
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$site_logo = '';
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$custom_logo_id = (int) get_theme_mod('custom_logo');
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if ($custom_logo_id > 0) {
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$site_logo = wp_get_attachment_image_url($custom_logo_id, 'full');
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} elseif (has_site_icon()) {
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$site_logo = get_site_icon_url(512);
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}
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$schema_graph = [];
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$organization = [
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'@type' => 'Organization',
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'@id' => $home_url . '#organization',
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'name' => $site_name,
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'url' => $home_url,
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];
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if ($site_logo) {
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$organization['logo'] = $site_logo;
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}
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$schema_graph[] = $organization;
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$website = [
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'@type' => 'WebSite',
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'@id' => $home_url . '#website',
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'url' => $home_url,
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'name' => $site_name,
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'publisher' => ['@id' => $home_url . '#organization'],
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'potentialAction' => [
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'@type' => 'SearchAction',
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'target' => home_url('/?s={search_term_string}'),
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'query-input' => 'required name=search_term_string',
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],
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];
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$schema_graph[] = $website;
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if (is_singular()) {
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$canonical = juconnect_get_canonical_url();
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$webpage = [
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'@type' => 'WebPage',
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'@id' => $canonical . '#webpage',
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'url' => $canonical,
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'name' => single_post_title('', false),
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'isPartOf' => ['@id' => $home_url . '#website'],
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'description' => juconnect_get_meta_description(),
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];
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$schema_graph[] = $webpage;
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if (is_singular('post')) {
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$article = [
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'@type' => 'Article',
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'@id' => $canonical . '#article',
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'mainEntityOfPage' => ['@id' => $canonical . '#webpage'],
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'headline' => single_post_title('', false),
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'datePublished' => get_post_time(DATE_W3C, true),
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'dateModified' => get_post_modified_time(DATE_W3C, true),
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'author' => [
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'@type' => 'Person',
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'name' => get_the_author_meta('display_name', (int) get_post_field('post_author', get_queried_object_id())),
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],
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'publisher' => ['@id' => $home_url . '#organization'],
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];
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$image = juconnect_get_social_image_url();
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if ($image) {
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$article['image'] = [$image];
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}
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$schema_graph[] = $article;
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}
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}
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$json_ld = [
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'@context' => 'https://schema.org',
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'@graph' => $schema_graph,
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];
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echo '<script type="application/ld+json">' . wp_json_encode($json_ld, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE) . '</script>' . "\n";
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}
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add_action('wp_head', 'juconnect_output_json_ld', 6);
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function juconnect_assets() {
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$theme_ver = wp_get_theme()->get('Version');
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$style_ver = filemtime(get_stylesheet_directory() . '/style.css');
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$script_ver = filemtime(get_template_directory() . '/assets/js/app.js');
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if (!$style_ver) {
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$style_ver = $theme_ver;
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}
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if (!$script_ver) {
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$script_ver = $theme_ver;
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}
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wp_enqueue_style('juconnect-style', get_stylesheet_uri(), [], $style_ver);
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wp_enqueue_script('juconnect-app', get_template_directory_uri().'/assets/js/app.js', [], $script_ver, true);
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}
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add_action('wp_enqueue_scripts', 'juconnect_assets');
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/**
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* Render primary nav in strict styleguide markup:
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* - groups = top-level items
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* - links = children + optionally the parent itself
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*/
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function juconnect_render_sidenav_nav() {
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$locations = get_nav_menu_locations();
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if (!isset($locations['primary'])) return;
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$menu_obj = wp_get_nav_menu_object($locations['primary']);
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if (!$menu_obj) return;
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$items = wp_get_nav_menu_items($menu_obj->term_id);
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if (!$items) return;
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$by_parent = [];
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foreach ($items as $it) {
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$pid = (int)$it->menu_item_parent;
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if (!isset($by_parent[$pid])) $by_parent[$pid] = [];
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$by_parent[$pid][] = $it;
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}
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$top = $by_parent[0] ?? [];
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foreach ($top as $parent) {
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echo '<div class="navgroup">';
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echo '<div class="navgroup__title">'.esc_html($parent->title).'</div>';
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// Parent link as first item (optional but useful)
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if (!empty($parent->url) && $parent->url !== '#') {
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echo '<a class="navlink" href="'.esc_url($parent->url).'">'.esc_html('Übersicht').'</a>';
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}
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$children = $by_parent[(int)$parent->ID] ?? [];
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foreach ($children as $child) {
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echo '<a class="navlink" href="'.esc_url($child->url).'">'.esc_html($child->title).'</a>';
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}
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echo '</div>';
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}
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}
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// Add styleguide classes to WP menus
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function juconnect_nav_link_attributes($atts, $item, $args, $depth){
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if (!empty($args->theme_location) && in_array($args->theme_location, ['primary', 'footer'], true)){
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$existing = isset($atts['class']) ? $atts['class'].' ' : '';
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$atts['class'] = $existing . 'navlink';
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}
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return $atts;
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}
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add_filter('nav_menu_link_attributes', 'juconnect_nav_link_attributes', 10, 4);
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function juconnect_nav_menu_submenu_class($classes, $args, $depth){
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if (!empty($args->theme_location) && $args->theme_location === 'primary'){
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$classes[] = 'topnav__submenu';
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}
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return $classes;
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}
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add_filter('nav_menu_submenu_css_class', 'juconnect_nav_menu_submenu_class', 10, 3);
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