Updated Code for Series Posts

I just posted about a problem with series posts. Almost immediately I solved it.

I’m not really ready for this to go public – as all it does is tag the posts (I really want to only show the HTML of those posts), but I wanted to check that my manual remedy for ensuring that posting code doesn’t do funny things to my friend’s RSS reader works (see comment on previous). I’ve tried to prevent this by using a ‘read more’ tag as that should stop the RSS at that point.

Ultimately, I’d want to have the software automatically trim down the lines so I don’t have to rely on doing this manually.

This code tags the first/last/prev and next posts, and then uses CSS to clean it up.

This code goes in functions.php – relying on the thematic framework

function childtheme_article_footer($footer) {
	$extra_stuff='';

	global $id, $post;
	$series = get_post_meta($post->ID, 'Series', true);
	$pstlink = get_permalink();
	$psttitle = get_the_title();
	$pstbody = get_the_excerpt();
	if($series) :
		$args = array(
			'numberposts' => -1,
			'meta_key' => 'Series',
			'meta_value' => $series,
		);
		$series_posts = get_posts($args);
		if($series_posts) :
			$class = preg_replace("/[^a-z0-9\\040\\.\\-\\_\\\\]/i", "", $series);
			$class = strtolower(str_replace(array(' ', ' '), '-', $class));
			if (is_single()) {
				$extra_stuff = '<div class="series series-' . $class . '"><h4 class="series-title">' . __('Articles in this series') . '</h4><ul>';

				// This bit finds first, last, previous, next and current posts.

				$lowest=99999999999;
				$prevpost=99999999999;
				$nextpost=0;
				$highest=0;
				$lastwascurrent=0;
				$currenthaspassed=0;
				foreach($series_posts as $serial) :
					if ($lastwascurrent == 1) {
						$lastwascurrent = 0;
						$prevpost=$serial->ID;
					}
					if ($serial->ID < $lowest) {
						$lowest = $serial->ID;
					}
					if ($serial->ID == $post->ID) {
						$current=$serial->ID;
						$lastwascurrent=1;
						$currenthaspassed=1;
					}
					if ($currenthaspassed == 0) {
						$nextpost=$serial->ID;
					}
					if ($serial->ID > $highest) {
						$highest=$serial->ID;
					}
				endforeach;

				foreach($series_posts as $serial) :
					if($serial->ID == $post->ID)
                			        $extra_stuff = $extra_stuff . '<li class="current-post">' . $serial->post_title . '</li>';
               				else {
						$extra_stuff = $extra_stuff .  '<li';

						// Custom CSS for first, last, previous, next and current posts
						if ($serial->ID == $highest) {$extra_stuff = $extra_stuff .  ' class="highestseriespost">Newest in Series: ';} else {
							if ($serial->ID == $lowest) {$extra_stuff = $extra_stuff .  ' class="lowestseriespost">First in Series: ';} else {
								if ($serial->ID == $prevpost) {$extra_stuff = $extra_stuff . ' class="previnseries">Previous in Series: ';} else {
									if ($serial->ID == $nextpost) {$extra_stuff = $extra_stuff . ' class="nextinseries">Next in Series: ';} else {
										$extra_stuff = $extra_stuff . ' class="regularseriespost">';
									}
								}
							}
						}
						$extra_stuff = $extra_stuff .  '<a href="' . get_permalink($serial->ID);
						$extra_stuff = $extra_stuff .  '" class="postID_' . $serial->ID;
						$extra_stuff = $extra_stuff .  '" title="';
						$extra_stuff = $extra_stuff .  str_replace('"', '"', $serial->post_title) . '">';
						$extra_stuff = $extra_stuff .  str_replace('"', '"', $serial->post_title);
						$extra_stuff = $extra_stuff .  '</a></li>';
               				}
				endforeach;
				$extra_stuff = $extra_stuff .  '</ul></div>';

			} else { 

                                $extra_stuff = $extra_stuff .  '<div class="series series-' . $class . '">';
                                $extra_stuff = $extra_stuff .  '<h4 class="series-title"><a href="' . $pstlink . '">' . $psttitle . '</a>';
                                $extra_stuff = $extra_stuff .  ' is part of a series' . '</h4></div>';
                        }
		endif;
	endif;

	$pageurl = get_bloginfo('siteurl');
        $pageurl = $pageurl . "?p=" . $post->ID;
	$extra_stuff_post = '<div class="socialnetwork"><ul>';
	$extra_stuff_post = $extra_stuff_post . '<li>Send to: <a class="twitterlink" href="http://twitter.com/home?status=Currently reading ' . $pageurl . '" title="Click to send ' . $psttitle . ' to Twitter!" target="_blank">Twitter</a></li>';
	$extra_stuff_post = $extra_stuff_post . '<li><a class="deliciouslink" href="http://del.icio.us/post?url=' . $pstlink . '&title=' . $psttitle . '" title="Click to bookmark ' . $psttitle . ' on del.icio.us!" target="_blank">del.icio.us</a></li>';
	$extra_stuff_post = $extra_stuff_post . '<li><a class="digglink" href="http://digg.com/submit?phase=2&url=' . $pstlink . '&title='. $psttitle . '&bodytext=' . $pstbody . '" title="Click to bookmark ' . $psttitle . ' on Digg!" target="_blank">Digg</a></li>';
	$rss_url = get_bloginfo('rss2_url');
	$extra_stuff_post = $extra_stuff_post . '<li>Use the: <a class="rsslink" href="' . $rss_url . '" title="Click to Subscribe to the Feed"  rel="alternate" type="application/rss+xml" target="_blank">RSS Feed</a></li>';
	$extra_stuff_post = $extra_stuff_post . '</ul></div>';
	$footer = $extra_stuff . $footer . $extra_stuff_post;
	return $footer;
}

add_action('thematic_postfooter','childtheme_article_footer');

In style.css, I add this:

div.series .regularseriespost {display: none;}
div.series .current-post {display: none;}