qa-edh-layer.php

<?php
/*
	Question2Answer Edit History plugin
	License: http://www.gnu.org/licenses/gpl.html
*/

class qa_html_theme_layer extends qa_html_theme_base
{
	private $rev_postids = array();

	public function doctype()
	{
		$q_tmpl = $this->template == 'question';
		$qa_exists = isset($this->content['q_view']) && isset($this->content['a_list']);
		$user_permitted = qa_user_permit_error('edit_history_view_perms') === false;

		if ($q_tmpl && $qa_exists && $user_permitted)
		{
			// grab a list of all Q/A posts on this page
			$postids = array($this->content['q_view']['raw']['postid']);
			foreach ( $this->content['a_list']['as'] as $answ )
				$postids[] = $answ['raw']['postid'];

			// check for revisions in these posts
			$sql = 'SELECT DISTINCT postid FROM ^edit_history WHERE postid IN (' . implode(', ', $postids) . ')';
			$this->rev_postids = qa_db_read_all_values( qa_db_query_sub($sql) );
		}

		parent::doctype();
	}

	public function post_meta($post, $class, $prefix=null, $separator='<BR/>')
	{
		// only link when there are actual revisions
		if ( isset($post['when_2']) && in_array($post['raw']['postid'], $this->rev_postids) )
		{
			$url = qa_path_html('revisions/' . $post['raw']['postid']);
			$post['when_2']['data'] = '<a rel="nofollow" href="'.$url.'" class="'.$class.'-revised">' . $post['when_2']['data'] . '</a>';
		}

		parent::post_meta($post, $class, $prefix, $separator);
	}

}