From dea96e48fc61b3919e388e8e4e21046c0d07da45 Mon Sep 17 00:00:00 2001
From: David Madl <git@abanbytes.eu>
Date: Sun, 1 Mar 2026 20:52:30 +0100
Subject: [PATCH] generate Open Graph meta tags for category = Kurzgeschichten

---
 ruady-og-head.php | 80 +++++++++++++++++++++++++++++------------------
 1 file changed, 50 insertions(+), 30 deletions(-)

diff --git a/ruady-og-head.php b/ruady-og-head.php
index 88259e9..f4c89b4 100644
--- a/ruady-og-head.php
+++ b/ruady-og-head.php
@@ -1,18 +1,20 @@
 <?php
 /**
- * Plugin Name: Per-Post Head HTML
- * Description: Inserts generated HTML into the document head for the currently displayed singular post.
+ * Plugin Name: Ruady OG Head
+ * Description: Generates Open Graph tags for Social Media sharing (Facebook, Twitter/X, etc.)
  * Version: 0.1.0
- * Author: Your Name
+ * Author: David Madl
  */
 
+// note: install by copying into wp-content/plugins/ruady-og-head/ruady-og-head.php
+
 declare(strict_types=1);
 
 if ( ! defined( 'ABSPATH' ) ) {
 	exit;
 }
 
-final class Per_Post_Head_HTML {
+final class Ruady_OG_Head {
 	public static function init(): void {
 		add_action( 'wp_head', [ __CLASS__, 'render_head_markup' ], 20 );
 	}
@@ -37,6 +39,10 @@ final class Per_Post_Head_HTML {
 			return;
 		}
 
+		if ( ! has_category( 'Kurzgeschichten', $post_id ) ) {
+			return;
+		}
+
 		$html = self::build_markup_for_post( $post );
 
 		if ( $html === '' ) {
@@ -46,10 +52,23 @@ final class Per_Post_Head_HTML {
 		echo "\n" . $html . "\n";
 	}
 
+	private static function make_description( string $text ): string {
+		$target_length = 150;
+		$parts = explode(' ', $text);
+		$lengths = array_map('strlen', $parts);
+		$total_length = 0;
+		$i = 0;
+		for ( ; $i < count($lengths); $i++ ) {
+			if ( $total_length + $lengths[$i] > $target_length ) break;
+			$total_length += $lengths[$i];
+		}
+		$desc = implode(' ', array_slice($parts, 0, $i));
+		$ellipsis = substr($desc, -1, 1) == '.' ? '' : ' ...'; // full sentences with a '.' don't need ellipsis '...'
+		return $desc . $ellipsis;
+	}
+
 	/**
 	 * Build the head markup for one post.
-	 *
-	 * This is the function you will customize.
 	 */
 	private static function build_markup_for_post( WP_Post $post ): string {
 		// Example 1: conditionally emit markup only for a specific post type.
@@ -59,7 +78,13 @@ final class Per_Post_Head_HTML {
 
 		$post_url   = get_permalink( $post );
 		$post_title = get_the_title( $post );
-		$excerpt    = has_excerpt( $post ) ? get_the_excerpt( $post ) : '';
+		$excerpt    = get_the_excerpt( $post );
+		$site_title = get_bloginfo( 'name' );
+		$site_url   = site_url();
+		$site_url_p = parse_url($site_url);
+		$site_host  = $site_url_p['host'];
+
+		$description = self::make_description(wp_strip_all_tags( $excerpt ));
 
 		// Example business logic:
 		// - add a meta tag for every post
@@ -68,36 +93,31 @@ final class Per_Post_Head_HTML {
 
 		ob_start();
 		?>
+			<meta name="description" content="<?php echo esc_attr( $description ); ?>">
+
+			<!-- Open Graph Meta Tags -->
+			<meta property="og:url" content="<?php echo esc_url( $site_url ); ?>">
+			<meta property="og:type" content="website">
+			<meta property="og:title" content="<?php echo esc_attr( $post_title ); ?> &#8211; <?php echo esc_attr( $site_title ); ?>">
+			<meta property="og:description" content="<?php echo esc_attr( $description ); ?>">
+			<!--<meta property="og:image" content="">--><!-- Load error, please check URL -->
+
+			<!-- Twitter Meta Tags -->
+			<meta name="twitter:card" content="summary_large_image">
+			<meta property="twitter:domain" content="<?php echo esc_attr( $site_host ); ?>">
+			<meta property="twitter:url" content="<?php echo esc_url( $site_url ); ?>">
+			<meta name="twitter:title" content="<?php echo esc_attr( $post_title ); ?> &#8211; <?php echo esc_attr( $site_title ); ?>">
+			<meta name="twitter:description" content="<?php echo esc_attr( $description ); ?>">
+			<!--<meta name="twitter:image" content="">-->
+
 		<!-- Per-Post Head HTML plugin -->
 		<meta name="x-post-id" content="<?php echo esc_attr( (string) $post->ID ); ?>">
 		<meta name="x-post-type" content="<?php echo esc_attr( $post->post_type ); ?>">
 		<link rel="canonical" href="<?php echo esc_url( $post_url ); ?>">
-
-		<?php if ( $excerpt !== '' ) : ?>
-			<meta name="description" content="<?php echo esc_attr( wp_strip_all_tags( $excerpt ) ); ?>">
-		<?php endif; ?>
-
-		<?php if ( $is_news ) : ?>
-			<script type="application/ld+json">
-				<?php
-				echo wp_json_encode(
-					[
-						'@context'      => 'https://schema.org',
-						'@type'         => 'NewsArticle',
-						'headline'      => $post_title,
-						'url'           => $post_url,
-						'datePublished' => get_post_time( 'c', true, $post ),
-						'dateModified'  => get_post_modified_time( 'c', true, $post ),
-					],
-					JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE
-				);
-				?>
-			</script>
-		<?php endif; ?>
 		<?php
 
 		return trim( (string) ob_get_clean() );
 	}
 }
 
-Per_Post_Head_HTML::init();
+Ruady_OG_Head::init();