• 
  ';
      $source = preg_replace('||i', '
  ', $source);
      $source = strip_tags($source, $allowedTags);
      return preg_replace('/<(.*?)>/ie', "'<'.removeEvilAttributes('\\1').'>'", $source);
  }
  
  /**
   * @return string
   * @param string
   * @desc Strip forbidden attributes from a tag
   */
  function removeEvilAttributes($tagSource)
  {
      $stripAttrib = 'javascript:|onclick|ondblclick|onmousedown|onmouseup|onmouseover|'.
                     'onmousemove|onmouseout|onkeypress|onkeydown|onkeyup';
      return stripslashes(preg_replace("/$stripAttrib/i", '', $tagSource));
  }
  
  /** Convert html to plain text
   */
  function htmlToPlainText($res)
  {
      $res = trim(html_entity_decode(strip_tags($res, '
  
  ')));
      $res = preg_replace("@]*>@i", "\n", $res);
      if (!is_utf8($res)) {
          $res = utf8_encode($res);
      }   
      return $res;
  }
  
  /********************************************************************************
   * RICHTEXT STUFF
   */
  
  /** Convert richtext to html
   */
  function richtextToHtml($source)
  {
      $tags = Array('bold' => 'b',
                    'italic' => 'i',
                    'smaller' => 'small',
                    'bigger' => 'big',
                    'underline' => 'u',
                    'subscript' => 'sub',
                    'superscript' => 'sup',
                    'excerpt' => 'blockquote',
                    'paragraph' => 'p',
                    'nl' => 'br'
              );
              
      // clean unsupported tags
      $protectedTags = '<'.join('><', array_keys($tags)).'>';
      $source = strip_tags($source, $protectedTags);
      
      // convert richtext tags to html
      foreach (array_keys($tags) as $tag) {
          $source = preg_replace('@(]*>)@i', '\1'.$tags[$tag].'\2', $source);
      }
  
      // some special cases
      $source = preg_replace('@@i', '
  -- 
  ', $source);
      $source = preg_replace('@@i', '', $source);
      $source = preg_replace('@@i', '<', $source);
      $source = preg_replace('@]*>((?:[^<]|<(?!/comment>))*)@i', '', $source);
      return removeEvilAttributes($source);
  }
  
  /********************************************************************************
   *  HEADER STUFF
   */
  
  function _headerdecode($charset, $c, $str) {
      $s = ($c == 'Q' || $c == 'q') ? quoted_printable_decode($str) : base64_decode($str);
      $s = iconv($charset, 'iso-8859-15', $s);
      return str_replace('_', ' ', $s);
  }
   
  function headerDecode($value) {
      $val = preg_replace('/(=\?[^?]*\?[BQbq]\?[^?]*\?=) (=\?[^?]*\?[BQbq]\?[^?]*\?=)/', '\1\2', $value);
      return preg_replace('/=\?([^?]*)\?([BQbq])\?([^?]*)\?=/e', '_headerdecode("\1", "\2", "\3")', $val);
  }
  
  function headerEncode($value, $trim = 0) {
      if ($trim) {
          if (strlen($value) > $trim) {
              $value = substr($value, 0, $trim) . "[...]";
          }
      }
      return "=?UTF-8?B?".base64_encode($value)."?=";
  }
  
  function header_translate($hdr) {
      switch ($hdr) {
          case 'from':            return _b_('De');
          case 'subject':         return _b_('Sujet');
          case 'newsgroups':      return _b_('Forums');
          case 'followup-to':     return _b_('Suivi-à');
          case 'date':            return _b_('Date');
          case 'organization':    return _b_('Organisation');
          case 'references':      return _b_('Références');
          case 'x-face':          return _b_('Image');
          default:
              if (function_exists('hook_headerTranslate')
                      && $res = hook_headerTranslate($hdr)) {
                  return $res;
              }
              return $hdr;
      }
  }
  
  function formatDisplayHeader($_header,$_text) {
      global $banana;
      switch ($_header) {
          case "date": 
              return formatDate($_text);
          
          case "followup-to":
              case "newsgroups":
              $res = "";
              $groups = preg_split("/[\t ]*,[\t ]*/",$_text);
              foreach ($groups as $g) {
                  $res .= makeHREF(Array('group' => $g), $g) . ', ';
              }
              return substr($res,0, -2);
  
          case "from":
              return formatFrom($_text);
          
          case "references":
              $rsl     = "";
              $ndx     = 1;
              $text    = str_replace("><","> <",$_text);
              $text    = preg_split("/[ \t]/",strtr($text,$banana->spool->ids));
              $parents = preg_grep("/^\d+$/",$text);
              $p       = array_pop($parents);
              $par_ok  = Array();
              
              while ($p) {
                  $par_ok[]=$p;
                  $p = $banana->spool->overview[$p]->parent;
              }
              foreach (array_reverse($par_ok) as $p) {
                  $rsl .= makeHREF(Array('group' => $banana->spool->group), $ndx);
                  $ndx++;
              }
              return $rsl;
  
          case "x-face":
              return '';
          
          default:
              if (function_exists('hook_formatDisplayHeader')
                      && $res = hook_formatDisplayHeader($_header, $_text))
              {
                  return $res;
              }
              return htmlentities($_text);
      }
  }
  
  /********************************************************************************
   *  FORMATTING STUFF
   */
  
  function formatDate($_text) {
      return strftime("%A %d %B %Y, %H:%M (fuseau serveur)", strtotime($_text));
  }
  
  function fancyDate($stamp) {
      $today  = intval(time() / (24*3600));
      $dday   = intval($stamp / (24*3600));
  
      if ($today == $dday) {
          $format = "%H:%M";
      } elseif ($today == 1 + $dday) {
          $format = _b_('hier')." %H:%M";
      } elseif ($today < 7 + $dday) {
          $format = '%a %H:%M';
      } else {
          $format = '%a %e %b';
      }
      return strftime($format, $stamp);
  }
  
  function formatFrom($text) {
  #     From: mark@cbosgd.ATT.COM
  #     From: mark@cbosgd.ATT.COM (Mark Horton)
  #     From: Mark Horton 
      $mailto = '".htmlentities($regs[1]."@".$regs[2])."";
      }
      if (preg_match("/^([^ ]+)@([^ ]+) \((.*)\)$/",$text,$regs)) {
          $result="$mailto{$regs[1]}@{$regs[2]}\">".htmlentities($regs[3])."";
      }
      if (preg_match("/^\"?([^<>\"]+)\"? +<(.+)@(.+)>$/",$text,$regs)) {
          $result="$mailto{$regs[2]}@{$regs[3]}\">".htmlentities($regs[1])."";
      }
      return preg_replace("/\\\(\(|\))/","\\1",$result);
  }
  
  function displayshortcuts($first = -1) {
      global $banana;
      extract($banana->state);
  
      $res  = '
  ';
      $res .= '[' . makeHREF(Array(), _b_('Liste des forums')) . '] ';
      if (is_null($group)) {
          return $res.'[' . makeHREF(Array('subscribe' => 1), _b_('Abonnements')) . ']
  ';
      }
     
      $res .= '[' . makeHREF(Array('group' => $group), $group) . '] ';
  
      if (is_null($artid)) {
          $res .= '[' . makeHREF(Array('group'  => $group,
  									 'action' => 'new'),
  							   _b_('Nouveau message'))
  			  . '] ';
          if (sizeof($banana->spool->overview)>$banana->tmax) {
              $res .= '
  ';
              $n = intval(log(count($banana->spool->overview), 10))+1;
              for ($ndx=1; $ndx <= sizeof($banana->spool->overview); $ndx += $banana->tmax) {
                  if ($first==$ndx) {
                      $fmt = "[%0{$n}u-%0{$n}u] ";
                  } else {
                      $fmt = '[' . makeHREF(Array('group' => $group,
  					                            'first' => $ndx),
  										  '%0' . $n . 'u-%0' . $n . 'u')
  						 . '] ';
                  }
                  $res .= sprintf($fmt, $ndx, min($ndx+$banana->tmax-1,sizeof($banana->spool->overview)));
              }
          }
      } else {
          $res .= '[' . makeHREF(Array('group'  => $group,
  		                             'artid'  => $artid,
  									 'action' => 'new'),
  							   _b_('Répondre'))
  			  . '] ';
          if ($banana->post && $banana->post->checkcancel()) {
              $res .= '[' . makeHREF(Array('group'  => $group,
  			                             'artid'  => $artid,
  										 'action' => 'cancel'), 
  								   _b_('Annuler ce message'))
  				  . '] ';
          }
      }
      return $res.'
  ';
  }
  
  /********************************************************************************
   *  FORMATTING STUFF : BODY
   */
  
  function autoformat($text)
  {
      global $banana;
      $length = $banana->wrap;
          
      $cmd = "echo ".escapeshellarg($text)." | perl -MText::Autoformat -e 'autoformat {left=>1, right=>$length, all=>1 };'";
      exec($cmd, $result, $ret);
      if ($ret != 0) {
          $result = split("\n", $text);
      }
      return $result;
  }                                
  
  function wrap($text, $_prefix="", $_force=false)
  {
      $parts = preg_split("/\n-- ?\n/", $text);
      if (count($parts)  >1) {
          $sign = "\n-- \n" . array_pop($parts);
          $text = join("\n-- \n", $parts);
      } else {
          $sign = '';
      }
     
      global $banana;
      $url    = $banana->url_regexp;
      $length = $banana->wrap;
      $max    = $length + ($length/10);
      $splits = split("\n", $text);
      $result = array();
      $next   = array();
      $format = false;
      foreach ($splits as $line) {
          if ($_force || strlen($line) > $max) {
              if (preg_match("!^(.*)($url)(.*)!i", $line, $matches) && strlen($matches[2]) > $length && strlen($matches) < 900) {
                  if (strlen($matches[1]) != 0) {
                      array_push($next, rtrim($matches[1]));
                      if (strlen($matches[1]) > $max) {
                          $format = true;
                      }
                  }
                      
                  if ($format) {
                      $result = array_merge($result, autoformat(join("\n", $next)));
                  } else {
                      $result = array_merge($result, $next);
                  }
                  $format = false;
                  $next   = array();
                  array_push($result, $matches[2]);
                      
                  if (strlen($matches[6]) != 0) {
                      array_push($next, ltrim($matches[6]));
                      if (strlen($matches[6]) > $max) {
                          $format = true;
                      }
                  }
              } else {
                  $format = true;
                  array_push($next, $line);
              }
          } else {
              array_push($next, $line);
          }
      }
      if ($format) {
          $result = array_merge($result, autoformat(join("\n", $next)));
      } else {
          $result = array_merge($result, $next);
      }
  
      return $_prefix.join("\n$_prefix", $result).($_prefix ? '' : $sign);
  }
  
  function cutlink($link)
  {
      global $banana;
      
      if (strlen($link) > $banana->wrap) {
          $link = substr($link, 0, $banana->wrap - 3)."...";
      }
      return $link;
  }
  
  function cleanurl($url)
  {
      $url = str_replace('@', '%40', $url);
      return ''.cutlink($url).'';
  }
  
  function formatbody($_text, $format='plain', $flowed=false)
  {
      if ($format == 'html') {
          $res = '
  '.html_entity_decode(to_entities(removeEvilTags($_text))).'
  ';
      } else if ($format == 'richtext') {
          $res = '
  '.html_entity_decode(to_entities(richtextToHtml($_text))).'
  ';
      } else {
          $res  = "\n\n" . to_entities(wrap($_text, "", $flowed))."\n\n";
      }
  
      if ($format != 'html') {
          global $banana;
          $url  = $banana->url_regexp;
          $res  = preg_replace("/(<|>|")/", " \\1 ", $res);
          $res  = preg_replace("!$url!ie", "'\\1'.cleanurl('\\2').'\\3'", $res);
          $res  = preg_replace('/(["\[])?(?:mailto:)?([a-z0-9.\-+_]+@[a-z0-9.\-+_]+)(["\]])?/i', '\1\2\3', $res);
          $res  = preg_replace("/ (<|>|") /", "\\1", $res);
  
          if ($format == 'richtext') {
              $format = 'html';
          }
      }
   
      if ($format == 'html') {
          $res = preg_replace("@(
  )\n?-- ?\n?(]*>|]*>)@", "\\1
  -- \\2", $res);
          $res = preg_replace("@]*>\n?-- ?\n?(]*>)@", "
  -- 
  \\2", $res);
          $res = preg_replace("@(]*>)\n?-- ?\n@", "
  -- 
  \\1", $res);
          $parts = preg_split("@(:?]*>\n?-- ?\n?
  |]*>\n?-- ?\n?]*>)@", $res);
      } else {
          while (preg_match("@(^|
  |\n)>@i", $res)) {
              $res  = preg_replace("@(^|
  |\n)((>[^\n]*\n)+)@ie",
                  "'\\1
  '"
      		    .".stripslashes(preg_replace('@(^|
  |\n)>[ \\t\\r]*@i', '\\1', '\\2'))"
  	    	    .".'
  '",
  	            $res);
          }
  	$res = preg_replace("@
  -- ?\n@", "
  \n-- \n", $res);
          $parts = preg_split("/\n-- ?\n/", $res);
      }
  
      if (count($parts) > 1) {
          $sign  = array_pop($parts);
          if ($format == 'html') {
              $res  = join('
  -- 
  ', $parts);
              $sign = '
  '.$sign.'
  ';
          } else {
              $res  = join('\n-- \n', $parts);
              $sign = '
  '.$sign;
          }
          return $res.$sign;
      } else {
          return $res;
      }
  }
  
  ?>