* @date May 24th 2010 * */ Class AttachmentGalleryManager{ var $path; var $options=array(); var $marker='\[attachmentgallery.*\]'; var $downloadText='Download Now'; /** * @desc * @author Leo Brown * */ function AttachmentGalleryManager(){ $this->path = dirname(__FILE__).'/'; } /** * @desc Gets a callable URL for a thumbnail of PDF etc * @author Leo Brown * @param * @return string The URL */ static function get_thumbnail_url($size, $local_url){ return WP_PLUGIN_URL.'/attachment-gallery/thumbnail.php?'. 'size='.$size. '&file='.$local_url; } /** * @desc Get shortcode options since we're retrofitting this and need to detect them later * @author Leo Brown * */ function thumbnailable_extensions(&$baseTypes){ $baseTypes[]='pdf'; return $baseTypes; } /** * @desc Get shortcode options since we're retrofitting this and need to detect them later * @author Leo Brown * */ function image_downsize($false, $id, $size=null){ // we're not doing this - hand back to Wordpress if(true){ // return image_downsize($id, $size); } // The original returns array( $img_url, $width, $height, $is_intermediate ); return array( AttachmentGalleryManager::get_thumbnail_url($size, wp_get_attachment_url($id)) ); } /** * @desc Get shortcode options since we're retrofitting this and need to detect them later * @author Leo Brown * */ function detect_gallery_options($content){ // get shortcode $shortcode=array(); $options=array(); if(preg_match("/{$this->marker}/", $content, $shortcode)){ // extract and use shortcode_parse_atts() to get the array $shortcode=reset($shortcode); preg_match('/\[[^ ]* (.*)\]/', $shortcode, $options); $options=shortcode_parse_atts(end($options)); return $options; } else return false; } /** * @desc Returns gallery HTML on the basis of options * @author Leo Brown * @param $options Array Options array * @return string HTML of Gallery */ function get_attachment_gallery(&$contents,$options=array('size'=>'100x150')){ // get our attachments $attachments = $this->find_attachment_links($contents, $options['filetypes']); // get metadata reader @include_once 'PDFMetaData.class.php'; if(class_exists('PDFMetaData')) $metaReader=new PDFMetaData(); // generate HTML for gallery $html=''; if($attachments){ // downlaod links $linkize=($options['download'] && ('no'!==$options['download'])); // classes $class = ' '; if(@$options['grid']) $class.="attachment_gallery_grid"; // output gallery $html .= "

"; foreach($attachments as $file){ // link to attachment itself, or it's WP page $file['link'] = @$options['linktopage'] ? $file['attachment_url'] : $file['url']; // manage relative links by prepending http://hostname/ if(!array_key_exists('host',@parse_url($file['url']))){ $file['url']="http://{$_SERVER['HTTP_HOST']}/{$file['url']}"; } $meta = $this->cache_get('attachment_gallery_'.md5($file['url'])); if(!is_array($meta)){ if(@$metaReader){ $meta = $metaReader->getMeta($file['url']); $this->cache_set('attachment_gallery_'.md5($file['url']),$meta); } } // output the base HTML for this attachment $html .= "

"; if(class_exists('imagick')){ $html .= '

'; if($linkize) $html .= ''; $html .= '

'; if($linkize) $html .= ''; $html .= '

'; } $html .="

"; if($linkize) $html .= ""; $html .= $file['title']; if($linkize) $html .= ''; $html .= "

"; // overwrite any extracted meta with WP-based meta // (i.e. Author, Subject, Keywords etc) // so if they give description=Author, the PDF "Author" tag will become // that from the Description field of the WP Media Library $replacements=array(); parse_str(html_entity_decode(@$options['metareplace']), $replacements); if($replacements) foreach($replacements as $from=>$to){ if($val = @$file[$from]) $meta[$to] = $val; } else $meta=array_merge($meta,$file); if($meta) foreach(@$meta as $key=>$value){ // split multiple lines onto DIVs so the user can style them if required $valueLines = explode("\n",str_replace(array('\r\n','\n'),"\n",$value)); $value = '

'.implode('

',$valueLines).'

'; $keyNiceName=strtolower(str_replace(' ','_',$key)); $html .="

{$key}: {$value}

"; } if($linkize) $html .= "

{$this->downloadText}

"; $html .= "

"; } $html .= '

'; if(@$options['grid']) $html .= ""; } return $html; } /** * @desc Places items the cache * @author Leo Brown * */ function cache_set($key, $data){ return @file_put_contents( sys_get_temp_dir().'/attachment_cache_'. md5($key),serialize($data) ); } /** * @desc Accesses the cache * @author Leo Brown * */ function cache_get($key){ return @unserialize(@file_get_contents( sys_get_temp_dir(). '/attachment_cache_'.md5($key) )); } /** * @desc Splices gallery content back into page content * @author Leo Brown * @todo Move this function to the shortcode library, probably * */ function insert_gallery($page, $gallery){ return preg_replace("/{$this->marker}/",$gallery,$page); } /** * @desc * @author Leo Brown * */ function find_attachment_links(&$input, $types){ // not yet used // if(!$types) $types=array('.pdf'); // $types=implode($types,'|'); // our list of files $results=array(); // pattern for any link - hand written / may need to be modified $regexp = "]*href=(['\"]??)([^\"\' >]*)\\1[^>]*>(.*)<\/a>"; // process our matches if(preg_match_all("/$regexp/siU", $input, $matches, PREG_SET_ORDER)) { foreach($matches as &$match){ // storage for this result $result=array(); // known values $result['title']=$match[3]; $result['url'] =$match[2]; // test if is rel=attachment (regex from _fix_attachment_links in post.php) $search = "#[\s]+rel=(\"|')(.*?)wp-att-(?P\d+)\\1#i"; if(preg_match($search, $match[0], $attachment)){ // get the attachment that this link refers to if($data = get_post($attachment['id'], 'ARRAY_A')){ $result['title'] = $data['post_title']; $result['url'] = $data['guid']; $result['description'] = $data['post_content']; $result['caption'] = $data['post_excerpt']; // get author etc too? } // save this into our list $result['attachment_id']=$attachment['id']; $result['attachment_url']=get_attachment_link($attachment['id']); } // only store if we actually have a URL that has a file type from the anchor tag // test for a dot in the filename if($result['url'] && preg_match('/.*\.[^.]/',$result['url'])){ // remove the link $input=str_replace($match[0],'',$input); // store result $results[]=$result; } } } return $results; } } /** * @desc Hooks the_content and absorbs attachment links, replaces them with a gallery * @author Leo Brown * */ function attachmentGalleryHook($content){ $manager=new AttachmentGalleryManager(); $options = $manager->detect_gallery_options($content); if(is_array($options)){ $gallery = $manager->get_attachment_gallery($content,$options); if($gallery){ return $manager->insert_gallery($content, $gallery); } else return $content; } else return $content; } ?>