/**
* Get the parser associated with this link instance.
*
* @return blcParser|null
*/
function get_parser()
{
if (is_null($this->_parser)) {
$this->_parser = blc_get_parser($this->parser_type);
}
return $this->_parser;
}
/**
* Hook for the 'the_content' filter. Scans the current post and adds the 'broken_link'
* CSS class to all links that are known to be broken. Currently works only on standard
* HTML links (i.e. the '<a href=...' kind).
*
* @param string $content Post content
* @return string Modified post content.
*/
function hook_the_content($content)
{
global $post, $wpdb;
if (empty($post)) {
return $content;
}
//Retrieve info about all occurences of broken links in the current post
$q = "\r\n\t\t\tSELECT instances.raw_url\r\n\t\t\tFROM {$wpdb->prefix}blc_instances AS instances JOIN {$wpdb->prefix}blc_links AS links \r\n\t\t\t\tON instances.link_id = links.link_id\r\n\t\t\tWHERE \r\n\t\t\t\tinstances.container_type = %s\r\n\t\t\t\tAND instances.container_id = %d\r\n\t\t\t\tAND links.broken = 1\r\n\t\t\t\tAND parser_type = 'link' \r\n\t\t";
$q = $wpdb->prepare($q, $this->container_type, $post->ID);
$links = $wpdb->get_results($q, ARRAY_A);
//Return the content unmodified if there are no broken links in this post.
if (empty($links) || !is_array($links)) {
return $content;
}
//Put the broken link URLs in an array
$broken_link_urls = array();
foreach ($links as $link) {
$broken_link_urls[] = $link['raw_url'];
}
//Iterate over all HTML links and modify the broken ones
$parser = blc_get_parser('link');
$content = $parser->multi_edit($content, array(&$this, 'highlight_broken_link'), $broken_link_urls);
return $content;
}