Initial commit of 0.2.0

2025-07-22 15:53:23 -05:00
parent 58a5fbbcb2
commit 70a9adac4c
13 changed files with 775 additions and 3 deletions
--- a/inc/global.php
+++ b/inc/global.php
@@ -0,0 +1,154 @@
+<?php
+/**
+ * @package ogre-obfuscation
+ * @author cleverogre
+ * @version 0.2.0
+ * @since 0.1.0
+ */
+
+namespace Ogre\Obfuscation;
+
+use simplehtmldom\HtmlDocument;
+use function is_user_logged_in;
+
+defined('ABSPATH') || exit;
+
+function email_enabled() {
+    if (is_user_logged_in()) return false;
+
+    if (Settings::instance()->email_enabled != '1') return false;
+
+    return true;
+}
+
+function obfuscate($str) {
+    static $obfuscate_id = 0;
+
+    $out = '';
+    for ($i = 0; $i < strlen($str); $i++) {
+        $out .= '&#' . ord(substr($str, $i, 1)) . ';';
+    }
+
+    $out2 = '';
+    for ($i = 0; $i < strlen($out); $i++) {
+        $out2 = substr($out, $i, 1) . $out2;
+    }
+
+    $output = "<span class=\"obfuscate\" id=\"obfuscate-{$obfuscate_id}\" data-content=\"{$out2}\"></span>";
+    $obfuscate_id++;
+    return $output;
+}
+
+function _obfuscate_element($element) {
+    return obfuscate($element->outertext);
+}
+
+function find_emails($str) {
+    preg_match_all('/[a-zA-Z0-9_\-\+\.]+@[a-zA-Z0-9\-]+\.([a-z]{2,4})(?:\.[a-z]{2})?/i', $str, $matches, PREG_OFFSET_CAPTURE);
+    if (!is_array($matches) || empty($matches)) return false;
+
+    $return = array();
+    foreach ($matches[0] as $match) {
+        $return[] = array(
+            'text' => $match[0],
+            'pos' => $match[1],
+            'len' => strlen($match[0]),
+        );
+    }
+
+    return $return;
+}
+
+function filter($content) {
+    // Parse content
+    $html = new HtmlDocument();
+    $html->load('<div id="dom_root">' . $content . '</div>');
+
+    //_filter_html($html->find('div[id=dom_root]', 0));
+
+    $html->find('div[id=dom_root]', 0)->outertext = _filter_html($html->find('div[id=dom_root]', 0));
+    $html->find('div[id=dom_root]', 0)->outertext = $html->find('div[id=dom_root]', 0)->innertext; // remove root div wrapper
+
+    $content = $html->save();
+
+    // Clean up memory
+    $html->clear();
+    unset($html);
+
+    return $content;
+}
+
+function _filter_html($element) {
+    if ($element == null) return false;
+
+    switch ($element->tag) {
+        case 'a':
+            if (_test_anchor($element)) {
+                return _obfuscate_element($element);
+            } else {
+                return $element->outertext;
+            }
+        default:
+            $node = _get_text_node($element);
+            $node['text'] = _filter_text($node['text']);
+
+            foreach ($node['tags'] as &$tag) {
+                $tag['content'] = _filter_html($tag['element']);
+            }
+
+            $element->outertext = _set_text_node($node);
+            return $element->outertext;
+    }
+}
+
+function _filter_text($text) {
+    $emails = find_emails($text);
+    if (!$emails) return $text;
+
+    for ($i = count($emails) - 1; $i >= 0; $i--) {
+        $text = substr($text, 0, $emails[$i]['pos']) . obfuscate($emails[$i]['text']) . substr($text, $emails[$i]['pos'] + $emails[$i]['len']);
+    }
+
+    return $text;
+}
+
+function _get_text_node($element) {
+    //$tag_pattern = '/<\s*[a-zA-Z]+[^>]*>.*?<\s*\/\s*[a-zA-Z]+>/is'
+
+    $text = $element->outertext;
+    $return = array(
+        'raw' => $text,
+        'text' => '',
+        'tags' => array(),
+    );
+
+    $i = 0;
+    foreach ($element->children() as $child) {
+        $return['tags'][$i] = array(
+            'element' => $child,
+            'index' => $i,
+            'key' => "[[{$i}]]",
+            'content' => $child->outertext,
+            'pos' => strpos($text, $child->outertext),
+            'len' => strlen($child->outertext),
+        );
+        $text = str_replace($child->outertext, "[[{$i}]]", $text);
+        $i++;
+    }
+
+    $return['text'] = $text;
+    return $return;
+}
+
+function _set_text_node($node) {
+    $text = $node['text'];
+    foreach ($node['tags'] as $tag) {
+        $text = str_replace($tag['key'], $tag['content'], $text);
+    }
+    return $text;
+}
+
+function _test_anchor($element) {
+    if ($element->tag != 'a') return false;
+    return preg_match('/<a.*>[a-zA-Z0-9_\-\+\.]+@[a-zA-Z0-9\-]+\.([a-z]{2,4})(?:\.[a-z]{2})?<\/a>/i', $element->outertext) == 1;
+}