<?php class pluginTwitterCards extends Plugin { public function init() { // Fields and default values for the database of this plugin $this->dbFields = array( 'defaultImage'=>'' ); } public function form() { global $L; $html = '<div class="alert alert-primary" role="alert">'; $html .= $this->description(); $html .= '</div>'; $html .= '<div>'; $html .= '<label>'.$L->get('Default image').'</label>'; $html .= '<input id="jsdefaultImage" name="defaultImage" type="text" value="'.$this->getValue('defaultImage').'" placeholder="https://">'; $html .= '</div>'; return $html; } public function siteHead() { global $url; global $site; global $WHERE_AM_I; global $content; global $page; $data = array( 'card' =>'summary', 'site' =>'', 'title' =>$site->title(), 'description' =>$site->description(), 'image' =>'' ); switch($WHERE_AM_I) { // The user filter by page case 'page': $data['title'] = $page->title(); $data['description'] = $page->description(); $data['image'] = $page->coverImage($absolute=true); $pageContent = $page->content(); break; // The user is in the homepage default: $pageContent = ''; // The image it's from the first page if(isset($content[0]) ) { $data['image'] = $content[0]->coverImage($absolute=true); $pageContent = $content[0]->content(); } break; } $html = PHP_EOL.'<!-- Twitter Cards -->'.PHP_EOL; $html .= '<meta property="twitter:card" content="'.$data['card'].'">'.PHP_EOL; $html .= '<meta property="twitter:site" content="'.$data['site'].'">'.PHP_EOL; $html .= '<meta property="twitter:title" content="'.$data['title'].'">'.PHP_EOL; $html .= '<meta property="twitter:description" content="'.$data['description'].'">'.PHP_EOL; // If the page doesn't have a coverImage try to get an image from the HTML content if( empty($data['image']) ) { // Get the image from the content $src = DOM::getFirstImage($pageContent); if ($src!==false) { $data['image'] = $src; } else { if (Text::isNotEmpty($this->getValue('defaultImage'))) { $data['image'] = $this->getValue('defaultImage'); } } } $html .= '<meta property="twitter:image" content="'.$data['image'].'">'.PHP_EOL; return $html; } }