View source
<?php
namespace Drupal\freelinking\Plugin\freelinking;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\Core\Url;
use Drupal\freelinking\Plugin\FreelinkingPluginBase;
use GuzzleHttp\Client;
use GuzzleHttp\Exception\RequestException;
use Symfony\Component\DependencyInjection\ContainerInterface;
class External extends FreelinkingPluginBase implements ContainerFactoryPluginInterface {
protected $client;
public function __construct(array $configuration, $plugin_id, $plugin_definition, Client $client) {
parent::__construct($configuration, $plugin_id, $plugin_definition);
$this->client = $client;
}
public function getIndicator() {
return '/^http(s)?|ext(ernal)?/';
}
public function getTip() {
return $this
->t('Click to visit an external URL.');
}
public function defaultConfiguration() {
return [
'settings' => [
'scrape' => '1',
],
] + parent::defaultConfiguration();
}
public function settingsForm(array $form, FormStateInterface $form_state) {
$settings = $this
->getConfiguration()['settings'];
$element['scrape'] = [
'#type' => 'radios',
'#title' => $this
->t('Scrape external URLs'),
'#description' => $this
->t('Should freelinking try to scrape external URLs?'),
'#options' => [
'0' => $this
->t('No'),
'1' => $this
->t('Yes'),
],
'#default_value' => isset($settings['scrape']) ? $settings['scrape'] : '1',
];
return $element;
}
public function buildLink(array $target) {
$scrape = $this
->getConfiguration()['settings']['scrape'];
$scheme = preg_match('/^http(s)?$/', $target['indicator']) === 1 ? $target['indicator'] . ':' : '';
$url = $scheme . $target['dest'];
$link = [
'#type' => 'link',
'#url' => Url::fromUri($url, [
'absolute' => TRUE,
'language' => $target['language'],
]),
'#attributes' => [
'title' => isset($target['tooltip']) ? $target['tooltip'] : $this
->getTip(),
],
];
if (!$target['text'] && $scrape) {
try {
$page_title = $this
->getPageTitle($url);
if ($page_title) {
$link['#title'] = $this
->t('Ext. link: “@title”', [
'@title' => $page_title,
]);
}
else {
$link['#title'] = $url;
}
} catch (RequestException $e) {
$link = [
'#theme' => 'freelink_error',
'#plugin' => 'external',
];
if ($e
->getResponse()
->getStatusCode() >= 400) {
$link['#message'] = $this
->t('External target “@url” not found', [
'@url' => $url,
]);
}
}
}
else {
$link['#title'] = $target['text'] ? $target['text'] : $target['dest'];
}
return $link;
}
protected function getPageTitle($url) {
$response = $this->client
->get($url);
$body = $response
->getBody()
->getContents();
if (preg_match('/<h1.*>(.*)<\\/h1>/', $body, $matches)) {
if (strlen($matches[1]) < 3 && preg_match('/<h2.*>(.*)<\\/h2>/', $body, $h2_matches)) {
return $h2_matches[1];
}
return $matches[1];
}
return '';
}
public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
return new static($configuration, $plugin_id, $plugin_definition, $container
->get('http_client'));
}
}