Decouple osTicket specific logic from html2text module

Fix preg_replace bugs

include/class.format.php

@@ -128,8 +128,8 @@ class Format {
         return is_array($var)?array_map(array('Format','strip_slashes'),$var):stripslashes($var);
     }
 
-    function wrap($text,$len=75) {
-        return wordwrap($text,$len,"\n",true);
+    function wrap($text, $len=75) {
+        return $len ? wordwrap($text, $len, "\n", true) : $text;
     }
 
     function html($html, $config=array('balance'=>1)) {
@@ -137,6 +137,29 @@ class Format {
         return htmLawed($html, $config);
     }
 
+    function html2text($html, $width=74) {
+
+        # Tidy html: decode, balance, sanitize tags
+        if($tidy)
+            $html = Format::html(Format::htmldecode($html), array('balance' => 1));
+
+        # See if advanced html2text is available (requires xml extension)
+        if (function_exists('convert_html_to_text')
+                && extension_loaded('xml'))
+            return convert_html_to_text($html, $width);
+
+        # Try simple html2text  - insert line breaks after new line tags.
+        $html = preg_replace(
+                array(':<br ?/?\>:i', ':(</div>)\s*:i', ':(</p>)\s*:i')
+                array("\n", "$1\n", "$1\n\n"),
+                $html);
+
+        # Strip tags, decode html chars and wrap resulting text.
+        return Format::wrap(
+                Format::htmldecode( Format::striptags($html, false)),
+                $width);
+    }
+
     function safe_html($html) {
         // Remove HEAD and STYLE sections
         $html = preg_replace(':<(head|style).+</\1>:is','', $html);

include/html2text.php

@@ -25,16 +25,8 @@
  * @return the HTML converted, as best as possible, to text
  */
 function convert_html_to_text($html, $width=74) {
-    $html = fix_newlines($html);
-
-    if (!extension_loaded('xml')) {
-        $html = preg_replace(
-           array(':<br ?/?>|</div>:i', ':</p>:i'),
-           array("\n", "\n\n"),
-           $html);
-        return Format::striptags($html);
-    }
 
+    $html = fix_newlines($html);
     $doc = new DOMDocument('1.0', 'utf-8');
     if (!@$doc->loadHTML($html))
         return $html;