macro_parser.php

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<?php

      /*
      *     This source code is a part of the Ultimix Project. 
      *     It is distributed under BSD license. All other third side source code (like tinyMCE) is distributed under 
      *     it's own license wich could be found from the corresponding files or sources. 
      *     This source code is provided "as is" without any warranties or garanties.
      *
      *     Have a nice day!
      *
      *     @url http://ultimix.sorceforge.net
      *
      *     @author Alexey "gdever" Dodonov
      */

      class macro_parser_1_0_0{
      
            function                is_params_valid( &$Params , &$RegExValidators )
            {
                  try
                  {
                        $Valid = true;
                        $Matches = array();
                        /* проверяем валидность параметров если надо */
                        if( count( $RegExValidators ) )
                        {
                              $ParamsList = explode( ';' , $Params );
                              foreach( $ParamsList as $key1 => $p )
                              {
                                    $p = explode( '=' , $p );
                                    foreach( $RegExValidators as $key2 => $rev )
                                    {
                                          if( $key2 == $p[ 0 ] )
                                          {
                                                $Result = preg_match( $rev , $p[ 1 ] , $Matches );
                                                $Valid = count( $Matches ) == 0 ? false : $Valid;
                                                break;
                                          }
                                    }
                              }
                        }
                        return( $Valid );
                  }
                  catch( Exception $e )
                  {
                        $a = func_get_args();_throw_exception_object( __METHOD__ , $a , $e );
                  }
            }
            
            function                handle_macro_start( $TmpStartPos , $TmpEndPos , &$StartPos , &$Counter )
            {
                  try
                  {
                        if( $TmpStartPos !== false && $TmpEndPos !== false )
                        {
                              if( $TmpStartPos < $TmpEndPos )
                              {
                                    $StartPos = $TmpEndPos;
                              }
                              if( $TmpEndPos < $TmpStartPos )
                              {
                                    $Counter--;
                                    if( $Counter )
                                    {
                                          $Counter++;
                                    }
                                    $StartPos = $TmpStartPos;
                              }
                        }
                  }
                  catch( Exception $e )
                  {
                        $a = func_get_args();_throw_exception_object( __METHOD__ , $a , $e );
                  }
            }

            function                handle_macro_end( $TmpStartPos , $TmpEndPos , &$StartPos , &$Counter , $MacroStartPos )
            {
                  try
                  {
                        if( $TmpStartPos !== false && $TmpEndPos === false )
                        {
                              $Counter++;
                              $StartPos = $TmpStartPos;
                        }

                        if( $TmpStartPos === false && $TmpEndPos !== false )
                        {
                              $Counter--;
                              $StartPos = $TmpEndPos;
                        }

                        if( $TmpStartPos === false && $TmpEndPos === false )
                        {
                              /* ничего не найдено, поэтому внешний цикл закончен, да и внутренний тоже
                                 $StartPos = strlen( $StringData ); */
                              $StartPos = $MacroStartPos;
                        }
                  }
                  catch( Exception $e )
                  {
                        $a = func_get_args();_throw_exception_object( __METHOD__ , $a , $e );
                  }
            }

            function                handle_macro_start_end( &$StringData , &$TmpStartPos , &$TmpEndPos , 
                                                                                                            &$StartPos , &$Counter , $MacroStartPos )
            {
                  try
                  {
                        $TmpStartPos = strpos( $StringData , chr( 123 ) , $StartPos + 1 );
                        $TmpEndPos = strpos( $StringData , chr( 125 ) , $StartPos + 1 );

                        $this->handle_macro_start( $TmpStartPos , $TmpEndPos , $StartPos , $Counter );

                        $this->handle_macro_end( 
                              $TmpStartPos , $TmpEndPos , $StartPos , $Counter , $MacroStartPos
                        );
                  }
                  catch( Exception $e )
                  {
                        $a = func_get_args();_throw_exception_object( __METHOD__ , $a , $e );
                  }
            }

            function                find_macro( &$StringData , &$TmpStartPos , &$TmpEndPos , 
                                                            &$StartPos , &$Counter , $MacroStartPos , $ParamStartPos , $RegExValidators )
            {
                  try
                  {
                        do
                        {
                              $this->handle_macro_start_end( 
                                    $StringData , $TmpStartPos , $TmpEndPos , $StartPos , $Counter , $MacroStartPos
                              );

                              if( $Counter == 0 )
                              {
                                    $Params = substr( $StringData , $ParamStartPos , $TmpEndPos - $ParamStartPos );
                                    if( $this->is_params_valid( $Params , $RegExValidators ) )
                                    {
                                          return( $Params );
                                    }
                                    $TmpStartPos = false;
                                    $StartPos = $MacroStartPos;
                              }
                        }
                        while( $TmpStartPos );

                        return( false );
                  }
                  catch( Exception $e )
                  {
                        $a = func_get_args();_throw_exception_object( __METHOD__ , $a , $e );
                  }
            }
      }
?>