Primo Committ

vendor/league/commonmark/src/Extension/ExternalLink/ExternalLinkExtension.php

@@ -0,0 +1,24 @@
+<?php
+
+/*
+ * This file is part of the league/commonmark package.
+ *
+ * (c) Colin O'Dell <colinodell@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace League\CommonMark\Extension\ExternalLink;
+
+use League\CommonMark\ConfigurableEnvironmentInterface;
+use League\CommonMark\Event\DocumentParsedEvent;
+use League\CommonMark\Extension\ExtensionInterface;
+
+final class ExternalLinkExtension implements ExtensionInterface
+{
+    public function register(ConfigurableEnvironmentInterface $environment)
+    {
+        $environment->addEventListener(DocumentParsedEvent::class, new ExternalLinkProcessor($environment), -50);
+    }
+}

vendor/league/commonmark/src/Extension/ExternalLink/ExternalLinkProcessor.php

@@ -0,0 +1,131 @@
+<?php
+
+/*
+ * This file is part of the league/commonmark package.
+ *
+ * (c) Colin O'Dell <colinodell@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace League\CommonMark\Extension\ExternalLink;
+
+use League\CommonMark\EnvironmentInterface;
+use League\CommonMark\Event\DocumentParsedEvent;
+use League\CommonMark\Inline\Element\Link;
+
+final class ExternalLinkProcessor
+{
+    public const APPLY_NONE = '';
+    public const APPLY_ALL = 'all';
+    public const APPLY_EXTERNAL = 'external';
+    public const APPLY_INTERNAL = 'internal';
+
+    /** @var EnvironmentInterface */
+    private $environment;
+
+    public function __construct(EnvironmentInterface $environment)
+    {
+        $this->environment = $environment;
+    }
+
+    /**
+     * @param DocumentParsedEvent $e
+     *
+     * @return void
+     */
+    public function __invoke(DocumentParsedEvent $e)
+    {
+        $internalHosts = $this->environment->getConfig('external_link/internal_hosts', []);
+        $openInNewWindow = $this->environment->getConfig('external_link/open_in_new_window', false);
+        $classes = $this->environment->getConfig('external_link/html_class', '');
+
+        $walker = $e->getDocument()->walker();
+        while ($event = $walker->next()) {
+            if ($event->isEntering() && $event->getNode() instanceof Link) {
+                /** @var Link $link */
+                $link = $event->getNode();
+
+                $host = parse_url($link->getUrl(), PHP_URL_HOST);
+                if (empty($host)) {
+                    // Something is terribly wrong with this URL
+                    continue;
+                }
+
+                if (self::hostMatches($host, $internalHosts)) {
+                    $link->data['external'] = false;
+                    $this->applyRelAttribute($link, false);
+                    continue;
+                }
+
+                // Host does not match our list
+                $this->markLinkAsExternal($link, $openInNewWindow, $classes);
+            }
+        }
+    }
+
+    private function markLinkAsExternal(Link $link, bool $openInNewWindow, string $classes): void
+    {
+        $link->data['external'] = true;
+        $link->data['attributes'] = $link->getData('attributes', []);
+        $this->applyRelAttribute($link, true);
+
+        if ($openInNewWindow) {
+            $link->data['attributes']['target'] = '_blank';
+        }
+
+        if (!empty($classes)) {
+            $link->data['attributes']['class'] = trim(($link->data['attributes']['class'] ?? '') . ' ' . $classes);
+        }
+    }
+
+    private function applyRelAttribute(Link $link, bool $isExternal): void
+    {
+        $rel = [];
+
+        $options = [
+            'nofollow'   => $this->environment->getConfig('external_link/nofollow', self::APPLY_NONE),
+            'noopener'   => $this->environment->getConfig('external_link/noopener', self::APPLY_EXTERNAL),
+            'noreferrer' => $this->environment->getConfig('external_link/noreferrer', self::APPLY_EXTERNAL),
+        ];
+
+        foreach ($options as $type => $option) {
+            switch (true) {
+                case $option === self::APPLY_ALL:
+                case $isExternal && $option === self::APPLY_EXTERNAL:
+                case !$isExternal && $option === self::APPLY_INTERNAL:
+                    $rel[] = $type;
+            }
+        }
+
+        if ($rel === []) {
+            return;
+        }
+
+        $link->data['attributes']['rel'] = \implode(' ', $rel);
+    }
+
+    /**
+     * @param string $host
+     * @param mixed  $compareTo
+     *
+     * @return bool
+     *
+     * @internal This method is only public so we can easily test it. DO NOT USE THIS OUTSIDE OF THIS EXTENSION!
+     */
+    public static function hostMatches(string $host, $compareTo)
+    {
+        foreach ((array) $compareTo as $c) {
+            if (strpos($c, '/') === 0) {
+                if (preg_match($c, $host)) {
+                    return true;
+                }
+            } elseif ($c === $host) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}