mirror of
https://github.com/WenPai-org/wpnav-links.git
synced 2025-08-03 02:48:44 +08:00
339 lines
No EOL
13 KiB
PHP
339 lines
No EOL
13 KiB
PHP
<?php
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if (!defined('ABSPATH')) {
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exit;
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}
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class WPNAV_Public {
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private $options;
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private $security;
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public function __construct($options, $security) {
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$this->options = $options;
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$this->security = $security;
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if (isset($options['enabled']) && $options['enabled']) {
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add_action('wp_enqueue_scripts', array($this, 'enqueue_scripts'));
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$this->setup_content_filters();
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add_action('wp_footer', array($this, 'add_footer_script'));
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}
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}
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public function enqueue_scripts() {
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wp_enqueue_script(
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'wpnav-redirect-script',
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WPNAV_LINKS_PLUGIN_URL . 'assets/js/redirect.js',
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array('jquery'),
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WPNAV_LINKS_VERSION,
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true
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);
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wp_localize_script(
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'wpnav-redirect-script',
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'wpnav_params',
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array(
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'home_url' => home_url(),
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'site_domain' => parse_url(home_url(), PHP_URL_HOST),
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'exclude_class' => $this->options['exclude_css_class'],
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'open_new_tab' => $this->options['open_in_new_tab'],
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'redirect_method' => isset($this->options['url_format']) ? $this->options['url_format'] : 'query',
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'url_encoding' => 'base64',
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'permalink_structure' => get_option('permalink_structure') ? true : false,
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'show_external_icon' => !empty($this->options['show_external_icon']),
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'whitelist_domains' => $this->get_whitelist_domains(),
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'strings' => array(
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'external_link' => __('External link', 'wpnav-links'),
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'opens_new_window' => __('(opens in a new window)', 'wpnav-links')
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)
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)
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);
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}
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private function get_whitelist_domains() {
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$whitelist = array();
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if (!empty($this->options['whitelist_domains'])) {
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$whitelist = explode("\n", $this->options['whitelist_domains']);
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$whitelist = array_map('trim', $whitelist);
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$whitelist = array_filter($whitelist);
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}
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return $whitelist;
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}
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private function setup_content_filters() {
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if (isset($this->options['intercept_comments']) && $this->options['intercept_comments']) {
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add_filter('comment_text', array($this, 'process_content'));
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}
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if (isset($this->options['intercept_widgets']) && $this->options['intercept_widgets']) {
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add_filter('widget_text', array($this, 'process_content'));
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add_filter('widget_custom_html_content', array($this, 'process_content'));
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}
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}
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public function process_content($content) {
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if (empty($content)) {
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return $content;
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}
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$dom = new DOMDocument();
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libxml_use_internal_errors(true);
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$dom->loadHTML('<?xml encoding="UTF-8"><div>' . $content . '</div>', LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
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libxml_clear_errors();
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$links = $dom->getElementsByTagName('a');
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$modified = false;
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$links_to_process = array();
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foreach ($links as $link) {
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$links_to_process[] = $link;
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}
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foreach ($links_to_process as $link) {
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$href = $link->getAttribute('href');
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if (empty($href)) {
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continue;
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}
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if (!empty($this->options['exclude_css_class'])) {
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$class = $link->getAttribute('class');
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if (strpos($class, $this->options['exclude_css_class']) !== false) {
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continue;
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}
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}
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if ($this->is_external_link($href)) {
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if ($this->security->check_whitelist_domain($href)) {
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continue;
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}
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$rel = $link->getAttribute('rel');
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$rel_values = empty($rel) ? array() : explode(' ', $rel);
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$rel_values = array_merge($rel_values, array('nofollow', 'noopener', 'noreferrer'));
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$rel_values = array_unique($rel_values);
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$link->setAttribute('rel', implode(' ', $rel_values));
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if ($this->options['open_in_new_tab']) {
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$link->setAttribute('target', '_blank');
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$title = $link->getAttribute('title');
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if (empty($title)) {
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$link->setAttribute('title', __('External link (opens in a new window)', 'wpnav-links'));
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}
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}
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$redirect_url = $this->security->get_redirect_url($href);
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$link->setAttribute('href', $redirect_url);
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$link->setAttribute('data-wpnav-external', '1');
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$modified = true;
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}
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}
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if (!$modified) {
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return $content;
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}
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$new_html = $dom->saveHTML($dom->documentElement);
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$new_html = preg_replace('/<\?xml encoding="UTF-8"\?>/', '', $new_html);
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$new_html = preg_replace('/<\/?div>/', '', $new_html);
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return $new_html;
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}
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private function is_external_link($url) {
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if (strpos($url, '://') === false && strpos($url, '//') !== 0) {
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return false;
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}
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$parsed_url = parse_url($url);
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if (empty($parsed_url) || !isset($parsed_url['host'])) {
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return false;
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}
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$site_domain = parse_url(home_url(), PHP_URL_HOST);
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$is_external = ($parsed_url['host'] !== $site_domain);
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if ($is_external) {
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if (!empty($this->options['auto_whitelist'])) {
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if (!empty($this->options['auto_whitelist']['same_root'])) {
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$site_root = $this->get_root_domain($site_domain);
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$url_root = $this->get_root_domain($parsed_url['host']);
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if ($site_root === $url_root) {
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$is_external = false;
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}
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}
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if ($is_external && !empty($this->options['auto_whitelist']['search_engines'])) {
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$search_engines = array('google.', 'bing.', 'yahoo.', 'baidu.', 'yandex.', 'duckduckgo.');
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foreach ($search_engines as $engine) {
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if (strpos($parsed_url['host'], $engine) !== false) {
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$is_external = false;
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break;
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}
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}
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}
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}
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}
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return $is_external;
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}
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private function get_root_domain($domain) {
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$domain_parts = explode('.', $domain);
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if (count($domain_parts) > 2) {
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$tld_part = array_slice($domain_parts, -2, 2);
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if (in_array($tld_part[0], array('co', 'com', 'net', 'org', 'gov', 'edu'))) {
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return implode('.', array_slice($domain_parts, -3, 3));
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}
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return implode('.', array_slice($domain_parts, -2, 2));
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}
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return $domain;
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}
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public function add_footer_script() {
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?>
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<script type="text/javascript">
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(function($) {
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function processAjaxContent() {
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var observer = new MutationObserver(function(mutations) {
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mutations.forEach(function(mutation) {
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if (mutation.addedNodes && mutation.addedNodes.length > 0) {
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var $links = $(mutation.addedNodes).find('a');
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if ($links.length) {
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processExternalLinks($links);
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}
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}
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});
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});
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observer.observe(document.body, {
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childList: true,
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subtree: true
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});
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}
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function processExternalLinks($elements) {
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$elements.each(function() {
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var $link = $(this);
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var href = $link.attr('href');
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if (!href) return;
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if ($link.attr('data-wpnav-external')) return;
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if ($link.hasClass(wpnav_params.exclude_class)) return;
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if (isExternalLink(href) && !isWhitelistedDomain(href)) {
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$link.attr('rel', 'nofollow noopener noreferrer');
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if (wpnav_params.open_new_tab) {
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$link.attr('target', '_blank');
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var currentTitle = $link.attr('title') || '';
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if (!currentTitle.includes('<?php echo esc_js(__('opens in a new window', 'wpnav-links')); ?>')) {
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var newTitle = currentTitle ?
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currentTitle + ' <?php echo esc_js(__('(opens in a new window)', 'wpnav-links')); ?>' :
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'<?php echo esc_js(__('External link (opens in a new window)', 'wpnav-links')); ?>';
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$link.attr('title', newTitle);
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}
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}
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$link.attr('href', getRedirectUrl(href));
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$link.attr('data-wpnav-external', '1');
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if (wpnav_params.show_external_icon) {
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addExternalIcon($link);
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}
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}
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});
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}
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function addExternalIcon($link) {
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if (!$link.find('.wpnav-external-icon').length) {
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var iconHtml = '<span class="wpnav-external-icon" style="font-size: 0.8em; margin-left: 3px; opacity: 0.6; vertical-align: super; color: rgb(100, 105, 112); transition: opacity 0.2s;">↗</span>';
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$link.append(iconHtml);
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}
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}
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function isExternalLink(url) {
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if (url.indexOf('://') === -1 && url.indexOf('//') !== 0) {
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return false;
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}
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var parser = document.createElement('a');
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parser.href = url;
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return parser.hostname !== wpnav_params.site_domain;
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}
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function isWhitelistedDomain(url) {
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if (!wpnav_params.whitelist_domains || wpnav_params.whitelist_domains.length === 0) {
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return false;
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}
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var parser = document.createElement('a');
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parser.href = url;
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var hostname = parser.hostname;
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return wpnav_params.whitelist_domains.indexOf(hostname) !== -1;
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}
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function getRedirectUrl(url) {
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var encodedUrl = encodeUrl(url);
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var currentPage = encodeURIComponent(window.location.href);
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switch(wpnav_params.redirect_method) {
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case 'path':
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if (wpnav_params.permalink_structure) {
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return wpnav_params.home_url + '/go/' + encodedUrl;
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} else {
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return wpnav_params.home_url + '?wpnav_redirect=1&url_param=' + encodeURIComponent(encodedUrl) + '&ref=' + currentPage;
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}
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break;
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case 'target':
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return wpnav_params.home_url + '?wpnav_redirect=1&target=' + encodeURIComponent(url) + '&ref=' + currentPage;
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break;
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default:
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return wpnav_params.home_url + '?wpnav_redirect=1&url=' + encodeURIComponent(encodedUrl) + '&ref=' + currentPage;
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break;
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}
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}
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function encodeUrl(url) {
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if (wpnav_params.redirect_method === 'target') {
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return url;
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}
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try {
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return btoa(url).replace(/[+/=]/g, function(match) {
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return {'+': '-', '/': '_', '=': ''}[match];
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});
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} catch (e) {
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return encodeURIComponent(url);
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}
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}
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$(document).ready(function() {
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processExternalLinks($('a:not([data-wpnav-external])'));
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processAjaxContent();
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if (wpnav_params.show_external_icon) {
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$(document).on('mouseenter', 'a[data-wpnav-external]', function() {
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$(this).find('.wpnav-external-icon').css('opacity', '1');
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});
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$(document).on('mouseleave', 'a[data-wpnav-external]', function() {
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$(this).find('.wpnav-external-icon').css('opacity', '0.6');
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});
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}
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});
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})(jQuery);
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</script>
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<?php
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}
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}
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