class_bbcode_core.php

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<?php

/*
+--------------------------------------------------------------------------
|   Invision Power Board v2.1.5
|   =============================================
|   by Matthew Mecham
|   (c) 2001 - 2005 Invision Power Services, Inc.
|   
|   =============================================
|   Web: 
|   Time: Wed, 01 Mar 2006 19:11:28 GMT
|   Release: 
|   Licence Info: 
+---------------------------------------------------------------------------
|   > $Date: 2006-02-06 23:08:03 +0000 (Mon, 06 Feb 2006) $
|   > $Revision: 140 $
|   > $Author: bfarber $
+---------------------------------------------------------------------------
|
|   > BB Code Core Module
|   > Module written by Matt Mecham
|   > Date started: Wednesday 9th March 2005 11:27
|
+--------------------------------------------------------------------------
*/

/**
* BBCode Parsing Core Class
*
* This class contains all the main class functions
* EXAMPLE USAGE
* <code>
* $parser           =  new parse_bbcode();
* $parser->ipsclass =& $this->ipsclass;
* 
* # If you wish convert posted text into BBCode
* $parser->parse_smilies = 1;
* $parser->parse_bbcode  = 1;
* 
* $bbcode_text = $parser->pre_db_parse( $_POST['text'] );
* 
* # If you wish to display this parsed BBCode, we've still got
* # to parse HTML (where allowed) and parse user defined BBCode.
* $parser->parse_html    = 0;
* $parser->parse_nl2br   = 1;
* $ready_to_print        = $parser->pre_display_parse(  $bbcode_text  );
* 
* # Sometimes, you may wish to just save the raw POST text and convert on-the-fly.
* # IPB does this with private messages, calendar events and announcements. In this case, you'd use the following:
* $parser->parse_html    = 0;
* $parser->parse_nl2br   = 1;
* $parser->parse_smilies = 1;
* $parser->parse_bbcode  = 1;
* $bbcode_text           = $parser->pre_db_parse( $_POST['text'] );
* $ready_to_print        = $parser->pre_display_parse( $bbcode_text );
* 
* # If you wish to convert already converted BBCode back into the raw format
* # (for use in an editing screen, for example) use this:
* $raw_post = $parser->pre_edit_parse( $parsed_text );
* 
* # Of course, if you're using the rich text editor (WYSIWYG) then you don't want to uncovert the HTML
* # otherwise the rich text editor will show unparsed BBCode tags, and not formatted HTML. In this case use this:
* $raw_post = $parser->convert_ipb_html_to_html( $parsed_text );
* </code>
*
* @package		InvisionPowerBoard
* @subpackage	BBCodeParser
* @author		Matt Mecham
* @copyright	Invision Power Services, Inc.
* @version		2.1
*/

/**
*
*/

/**
* BBCode Parsing Core Class
*
* Main object class
*
* @package		InvisionPowerBoard
* @subpackage	BBCodeParser
* @author  	 	Matt Mecham
* @version		2.1
* @since		2.1.0
*/
class class_bbcode_core
{
	/**
	* IPS Class Object
	*
	* @var object
	*/
	var $ipsclass;
	
	/**#@+
	* User defined setting
	* @var integer 
	*/
	var $parse_smilies    = 0;
	var $parse_html       = 0;
	var $parse_bbcode     = 0;
	var $parse_wordwrap   = 0;
	var $parse_nl2br      = 1;
	var $strip_quotes     = 0;
	var $allow_unicode    = 1;
	var $bypass_badwords  = 0;
	var $load_custom_tags = 0;
	var $max_embed_quotes = 15;
	
	// Do not change this unless you have a VERY good reason...
	var $strip_hex_entity = 1;
	/**#@-*/
	
	/**#@+
	* Internally defined setting
	* @var integer 
	*/
	var $image_count      = 0;
	var $emoticon_count   = 0;
	var $quote_open       = 0;
	var $quote_closed     = 0;
	var $quote_error      = 0;
	/**#@-*/
	
	/**#@+
	* Internally defined setting
	* @var string 
	*/
	var $error            = "";
	var $emoticons        = "";
	var $badwords         = "";
	var $in_sig           = "";
	/**#@-*/
	
	/**#@+
	* Internally defined array
	* @var string 
	*/
	var $quote_html     = array();
	var $rev_font_sizes = array();
	var $font_sizes     = array( 1 => '8',
								 2 => '10',
								 3 => '12',
								 4 => '14',
								 5 => '18',
								 6 => '24',
								 7 => '36' );
	/**#@-*/
	
	/*-------------------------------------------------------------------------*/
	// Global init
	/*-------------------------------------------------------------------------*/
	
	/**
	* Builds up font arrays
	*
	* @return void;
	*/
	function global_init()
	{
		//-------------------------------
		// Remap font sizes
		//-------------------------------
		
		foreach( $this->font_sizes as $bbcode => $real )
		{
			$this->rev_font_sizes[ $bbcode ] = $real;
		}
	}
	
	/*-------------------------------------------------------------------------*/
	// Get real font size
	/*-------------------------------------------------------------------------*/
	
	/**
	* Convert pt size to BBCode size
	*
	* @param	integer	Real size
	* @return   integer BBCode size
	*/
	function convert_realsize_to_bbsize( $real )
	{
		$real = intval( $real );
		
		if ( $this->rev_font_sizes[ $real ] )
		{
			return $this->rev_font_sizes[ $real ];
		}
		else
		{
			return 3;
		}
	}
	
	/*-------------------------------------------------------------------------*/
	// Get BBcode font size
	/*-------------------------------------------------------------------------*/
	
	/**
	* Convert BBCode size to px size
	*
	* @param	integer BBCode size
	* @return	integer Real size
	*/
	function convert_bbsize_to_realsize( $bb )
	{
		$bb = intval( $bb );
		
		if ( $this->font_sizes[ $bb ] )
		{
			return $this->font_sizes[ $bb ];
		}
		else
		{
			return 12;
		}
	}
	
	/*-------------------------------------------------------------------------*/
	// Clean up IPB html
	/*-------------------------------------------------------------------------*/
	
	/**
	* Convert special IPB HTML to normal HTML
	*
	* @param	string	Raw text
	* @return	string	Converted text
	*/
	function clean_ipb_html( $t="" )
	{
		//-----------------------------------------
		// left, right, center
		//-----------------------------------------
		
		$t = preg_replace( "#\[(left|right|center)\](.+?)\[/\\1\]#is"  , "<div align=\"\\1\">\\2</div>", $t );
		
		//-----------------------------------------
		// Indent => Block quote
		//-----------------------------------------
		
		while( preg_match( "#\[indent\](.+?)\[/indent\]#is" , $t ) )
		{
			$t = preg_replace( "#\[indent\](.+?)\[/indent\]#is"  , "<blockquote>\\1</blockquote>", $t );
		}
		
		//-----------------------------------------
		// Quotes
		//-----------------------------------------
		
		$t = preg_replace( "#<!--QuoteBegin-->(.+?)<!--QuoteEBegin-->#"                        , '[quote]'         , $t );
		$t = preg_replace( "#<!--QuoteBegin-{1,2}([^>]+?)\+([^>]+?)-->(.+?)<!--QuoteEBegin-->#", "[quote=\\1,\\2]" , $t );
		$t = preg_replace( "#<!--QuoteBegin-{1,2}([^>]+?)\+-->(.+?)<!--QuoteEBegin-->#"        , "[quote=\\1]"     , $t );
		$t = preg_replace( "#<!--QuoteEnd-->(.+?)<!--QuoteEEnd-->#"                            , '[/quote]'        , $t );
		
		//-----------------------------------------
		// New quote
		//-----------------------------------------
		
		$t = preg_replace( "#<!--quoteo([^>]+?)?-->(.+?)<!--quotec-->#sie", "\$this->_parse_new_quote('\\1', '\\2' )" , $t );
			
		//-----------------------------------------
		// SQL
		//-----------------------------------------
		
		$t = preg_replace( "#<!--sql-->(.+?)<!--sql1-->(.+?)<!--sql2-->(.+?)<!--sql3-->#eis", "\$this->unconvert_sql(\"\\2\")", $t);
		
		//-----------------------------------------
		// HTML
		//-----------------------------------------
		
		$t = preg_replace( "#<!--html-->(.+?)<!--html1-->(.+?)<!--html2-->(.+?)<!--html3-->#e", "\$this->unconvert_htm(\"\\2\")", $t);
		
		//-----------------------------------------
		// CODE
		//-----------------------------------------
		
		$t = preg_replace( "#<!--c1-->(.+?)<!--ec1-->#", '[code]' , $t );
		$t = preg_replace( "#<!--c2-->(.+?)<!--ec2-->#", '[/code]', $t );
			
		//-----------------------------------------
		// Remove all comments
		//-----------------------------------------
		
		# Leave this to the editor to show?
		# If we strip comments here, the <!--size(..)--> tags won't be converted back
		//$t = preg_replace( "#\<\!\-\-(.+?)\-\-\>#is", "", $t );
		
		$t = str_replace( '&#39;'  , "'", $t );
		$t = str_replace( '&#33;'  , "!", $t );
		$t = str_replace( '&#039;' , "'", $t );
		$t = str_replace( '&apos;' , "'", $t );
		
		//-----------------------------------------
		// Clean up nbsp
		//-----------------------------------------
		
		//$t = str_replace( '&nbsp;&nbsp;&nbsp;&nbsp;', "\t", $t );
		//$t = str_replace( '&nbsp;&nbsp;'            , "  ", $t );
		
		//-----------------------------------------
		// Remove snap back macro
		//-----------------------------------------
		
		$t = preg_replace("#<a href=['\"]index.php?act=findpost&(amp;)?pid=.+?['\"]><\{.+?\}></a>#", "", $t );
		
		//-----------------------------------------
		// Remove all macros
		//-----------------------------------------
		
		$t = preg_replace( "#<\{.+?\}>#", "", $t );
		
		return $t;
	}
	
	/*-------------------------------------------------------------------------*/
	// Strip quote tags
	/*-------------------------------------------------------------------------*/
	
	/**
	* Remove quote tags
	*
	* @param	string	Raw text
	* @return	string	Converted text
	*/
	function strip_quote_tags( $txt="" )
	{
		return preg_replace( "#\[QUOTE(=.+?,.+?)?\].+?\[/QUOTE\]#is", "", $txt );
	}
	
	/*-------------------------------------------------------------------------*/
	// strip all tags
	/*-------------------------------------------------------------------------*/
	
	/**
	* Remove ALL tags
	*
	* @param	string	Raw text
	* @return	string	Converted text
	*/
	function strip_all_tags( $txt="" )
	{
		$txt = $this->strip_quote_tags( $this->pre_edit_parse( $txt ) );
		
		while( preg_match( "#\[.+?\](.+?)\[/.+?\]#is", $txt ) )
		{
			$txt = preg_replace( "#\[.+?\](.+?)\[/.+?\]#is", "\\1", $txt );
		}
		
		$txt = preg_replace( "#\[attach.+?\]#is"       , ""   , $txt );
		
		return $txt;
	}
	
	/*-------------------------------------------------------------------------*/
	// strip all tags to formatted HTML
	/*-------------------------------------------------------------------------*/
	
	/**
	* Remove all tags, but format neatly
	*
	* @param	string	Raw text
	* @return	string	Converted text
	* @deprecated 2.1.0
	*/
	function strip_all_tags_to_formatted( $txt="" )
	{
		//$txt = $this->strip_quote_tags( $this->unconvert( $txt ) );
		//$txt = preg_replace( "#\[CODE\](.+?)\[/CODE\]#is", "<pre>\\1</pre>", $txt );
		//$txt = preg_replace( "#\[LIST\](.+?)\[/LIST\]#eis", "'<ul>' .str_replace( '[*]', '<li>', nl2br('\\1') ).'</ul>';", $txt );
		//$txt = preg_replace( "#\[LIST=.+?\](.+?)\[/LIST\]#eis", "'<ul>' .str_replace( '[*]', '<li>', nl2br('\\1') ).'</ul>';", $txt );
		//$txt = preg_replace( "#\[.+?\](.+?)\[/.+?\]#is", "\\1", $txt );
		
		return $txt;
	}
	
	/*-------------------------------------------------------------------------*/
	// PARSE POLL TAGS
	// Converts certain code tags for polling
	/*-------------------------------------------------------------------------*/
	
	/**
	* Parse poll tags
	*
	* @param	string	Raw text
	* @return	string	Converted text
	*/
	function parse_poll_tags($txt)
	{
		$txt = preg_replace( "#\[img\](.+?)\[/img\]#ie" , "\$this->regex_check_image('\\1')", $txt );
		$txt = preg_replace( "#\[url\](\S+?)\[/url\]#ie"                                       , "\$this->regex_build_url(array('html' => '\\1', 'show' => '\\1'))", $txt );
		$txt = preg_replace( "#\[url\s*=\s*\&quot\;\s*(\S+?)\s*\&quot\;\s*\](.*?)\[\/url\]#ie" , "\$this->regex_build_url(array('html' => '\\1', 'show' => '\\2'))", $txt );
		$txt = preg_replace( "#\[url\s*=\s*(\S+?)\s*\](.*?)\[\/url\]#ie"                       , "\$this->regex_build_url(array('html' => '\\1', 'show' => '\\2'))", $txt );
	
		return $txt;
	}
	
	/*-------------------------------------------------------------------------*/
	// My strip-tags. Converts HTML entities back before strippin' em
	/*-------------------------------------------------------------------------*/
	
	/**
	* Convert HTML entities before stripping them
	*
	* @param	string	Raw text
	* @return	string	Converted text
	*/
	function my_strip_tags($t="")
	{
		$t = str_replace( '&gt;', '>', $t );
		$t = str_replace( '&lt;', '<', $t );
		
		$t = strip_tags($t);
		
		//-----------------------------------------
		// Make sure nothing naughty is left...
		//-----------------------------------------
		
		$t = str_replace( '<', '&lt;', $t );
		$t = str_replace( '>', '&gt;', $t );
		
		return $t;
	}
	
	/*-------------------------------------------------------------------------*/
	// Checks opening and closing bbtags - never pre-parsed
	/*-------------------------------------------------------------------------*/
	
	/**
	* Check for custom BBcode tags
	*
	* @param	string	Raw text
	* @return	string	Converted text
	*/
	function bbcode_check($t="")
	{
		$count = array();
		
		foreach( $this->ipsclass->cache['bbcode'] as $i => $r )
		{
			if ( $r['bbcode_useoption'] )
			{
				$count[ $r['bbcode_id'] ]['open']      = substr_count( strtolower($t), '['.strtolower($r['bbcode_tag']).'=' );
				$count[ $r['bbcode_id'] ]['wrongopen'] = substr_count( strtolower($t), '['.strtolower($r['bbcode_tag']).']' );
			}
			else
			{
				$count[ $r['bbcode_id'] ]['open']      = substr_count( strtolower($t), '['.strtolower($r['bbcode_tag']).']' );
				$count[ $r['bbcode_id'] ]['wrongopen'] = substr_count( strtolower($t), '['.strtolower($r['bbcode_tag']).'=' );
			}
			
			$count[ $r['bbcode_id'] ]['closed'] = substr_count( strtolower($t), '[/'.strtolower($r['bbcode_tag']).']' );
			
			//-----------------------------------------
			// check...