Rework using Gemini

lib/Helper.php

@@ -36,4 +36,91 @@ class Helper {
 
         return ($dialogShowFrom <= $today && $until > $today);
     }
+
+    /**
+     * Generate an obfuscated email link to protect against automated spambot harvesting.
+     * Raw HTML contains no plain email address or mailto: link.
+     * Splitting into data attributes with CSS bidi-override fallback renders correctly visually,
+     * while JavaScript dynamically activates the live mailto link for real human visitors.
+     *
+     * @param string $email
+     * @param string|null $label Optional text/label before or wrapping the email
+     * @param array $attrs Optional HTML attributes (class, style, title, icon, etc.)
+     * @return string
+     */
+    public static function obfuscateEmail($email, $label = null, $attrs = []) {
+        if (strpos($email, '@') === false) {
+            return htmlspecialchars($email);
+        }
+        list($user, $domainPart) = explode('@', $email, 2);
+        $lastDot = strrpos($domainPart, '.');
+        if ($lastDot !== false) {
+            $domain = substr($domainPart, 0, $lastDot);
+            $tld = substr($domainPart, $lastDot + 1);
+        } else {
+            $domain = $domainPart;
+            $tld = '';
+        }
+
+        $reversed = strrev($email);
+        $baseClass = isset($attrs['class']) ? $attrs['class'] . ' mail-obf' : 'mail-obf';
+        $title = isset($attrs['title']) ? ' title="' . htmlspecialchars($attrs['title']) . '"' : '';
+        $style = isset($attrs['style']) ? ' style="' . htmlspecialchars($attrs['style']) . '"' : '';
+        $id = isset($attrs['id']) ? ' id="' . htmlspecialchars($attrs['id']) . '"' : '';
+
+        $content = '';
+        if (isset($attrs['icon']) && !empty($attrs['icon'])) {
+            $content .= $attrs['icon'] . ' ';
+        }
+
+        if ($label !== null && $label !== '') {
+            $content .= htmlspecialchars($label) . ' ';
+        }
+
+        $content .= '<span class="mail-val c-rev">' . htmlspecialchars($reversed) . '</span>';
+
+        return sprintf(
+            '<a href="javascript:void(0);" class="%s" data-usr="%s" data-dom="%s" data-tld="%s"%s%s%s>%s</a>',
+            htmlspecialchars($baseClass),
+            htmlspecialchars($user),
+            htmlspecialchars($domain),
+            htmlspecialchars($tld),
+            $title,
+            $style,
+            $id,
+            $content
+        );
+    }
+
+    /**
+     * Obfuscate plain text email (non-link).
+     */
+    public static function obfuscateEmailText($email, $attrs = []) {
+        if (strpos($email, '@') === false) {
+            return htmlspecialchars($email);
+        }
+        list($user, $domainPart) = explode('@', $email, 2);
+        $lastDot = strrpos($domainPart, '.');
+        if ($lastDot !== false) {
+            $domain = substr($domainPart, 0, $lastDot);
+            $tld = substr($domainPart, $lastDot + 1);
+        } else {
+            $domain = $domainPart;
+            $tld = '';
+        }
+
+        $reversed = strrev($email);
+        $baseClass = isset($attrs['class']) ? $attrs['class'] . ' mail-obf-text' : 'mail-obf-text';
+        $style = isset($attrs['style']) ? ' style="' . htmlspecialchars($attrs['style']) . '"' : '';
+
+        return sprintf(
+            '<span class="%s" data-usr="%s" data-dom="%s" data-tld="%s"%s><span class="mail-val c-rev">%s</span></span>',
+            htmlspecialchars($baseClass),
+            htmlspecialchars($user),
+            htmlspecialchars($domain),
+            htmlspecialchars($tld),
+            $style,
+            htmlspecialchars($reversed)
+        );
+    }
 }