lib/class.message.php

   1 <?php
   2 // $Id$
   3
   4 class InvalidMessageException extends Exception
   5 {
   6         protected $xmlline;
   7
   8         function __construct($msg = null, $code = 0, $line = 0)
   9         {
  10                 parent::__construct($msg, $code);
  11                 $this->xmlline = $line;
  12         }
  13
  14         function getXMLLine()
  15         {
  16                 return $this->xmlline;
  17         }
  18 }
  19
  20 class message
  21 {
  22         const M_HTML_ALL = 0;
  23         const M_HTML_NONE = 1;
  24         const M_HTML_FILTERED = 2;
  25         const M_NO_NEWLINES = 4;
  26         const M_URL_LENGTH = 60;
  27
  28         private $temp_text;
  29         private $xml;
  30         private $xml_string;
  31
  32         public $error_line;
  33         public $error_code;
  34         public $error_message;
  35         public $error_description;
  36         public $output;
  37
  38         public static $allowed_html = array(
  39                 'h1', 'h2', 'h3', 'h4', 'h5', 'h6',
  40                 'p', 'blockquote', 'q', 'ins', 'del', 'em', 'strong',
  41                 'code', 'pre', 'var',
  42                 'ol', 'ul', 'li', 'dl', 'dt', 'dd'
  43         );
  44
  45         function __construct($input, $formatting = null)
  46         {
  47                 if ( is_null($formatting) )
  48                         $formatting = self::M_HTML_FILTERED;
  49
  50                 $this->temp_text = str_replace("\r\n", "\n", $input);
  51                 $this->temp_text = htmlspecialchars($this->temp_text);
  52
  53                 if ( $formatting & self::M_HTML_NONE ) { //no html
  54                         null;
  55                 } elseif ( $formatting & self::M_HTML_FILTERED ) { //some html
  56
  57                         foreach ( self::$allowed_html as $tag )
  58                                 $preg1[] = '#&lt;('.$tag.')&gt;(.+)&lt;/('.$tag.')&gt;#Usie';
  59                         $this->temp_text = preg_replace($preg1, "'<'.strtolower('$1').'>$2</'.strtolower('$3').'>'", $this->temp_text);
  60
  61                 } else { //all html
  62                         $this->temp_text = html_entity_decode($this->temp_text);
  63                         $this->temp_text = preg_replace('#(^|\s)(<|>)_(<|>)($|\s)#e', 'htmlspecialchars(\'$0\')', $this->temp_text);
  64                 }
  65
  66                 if ( ! ($formatting & self::M_HTML_NONE) ) { //anything except plain
  67                         $this->temp_text = preg_replace('#(?<!")(http|ftp|irc)://(([0-9a-zA-Z\-_.+?/%=;:]|&amp;)+)#ie',
  68                                         "message::makeurl('$1://$2', ".$formatting.")",
  69                                         $this->temp_text);
  70                 }
  71
  72                 if ( ! ($formatting & self::M_NO_NEWLINES) ) {
  73                         $this->temp_text = nl2br($this->temp_text);
  74                         //Trim <br/>s after block elements
  75                         $this->temp_text = preg_replace('#<(/?table|/?tr|/t[dh]|/?[duo]l|/d[dt]|/li|/p|/h[1-6])>(\s*<br />)+#si',
  76                                                                                         '<$1>', $this->temp_text);
  77                 }
  78
  79                 $this->xml_validate();
  80                 $this->output = $this->temp_text;
  81         }
  82
  83         private function makeurl($uri, $formatting)
  84         {
  85                 if ( $formatting & self::M_HTML_FILTERED )
  86                         $uri = html_entity_decode($uri);
  87                 return '<a href="'.htmlentities($uri).'" rel="nofollow">'.
  88                                 ( strlen($uri) > self::M_URL_LENGTH ?
  89                                                         htmlentities(substr($uri, 0, self::M_URL_LENGTH)).'<strong>[...]</strong>' : $uri ).
  90                                 '</a>';
  91         }
  92
  93         private function xml_validate()
  94         {
  95                 // Check for broken XML, doesn't really do much else
  96                 $this->xml = xml_parser_create('UTF-8');
  97                 $this->xml_string = '<xhtml>'.$this->temp_text.'</xhtml>';
  98
  99                 if ( !xml_parse($this->xml, $this->xml_string, true) ) {
 100                         throw new InvalidMessageException(
 101                                 xml_error_string(xml_get_error_code($this->xml)),
 102                                 xml_get_error_code($this->xml),
 103                                 xml_get_current_line_number($this->xml)
 104                         );
 105                 }
 106         }
 107 }
 108 ?>