package_version.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
      */

      $FullClassNameCacheChanged = false;
      $FullClassNameCache = array();

      $PackageRealVersionCacheChanged = false;
      $PackageRealVersionCache = array();
      
      function                _compare_versions( $TmpVersion , $Sel )
      {
            try
            {
                  return(
                        $TmpVersion[ 0 ] > $Sel[ 0 ] || 
                        ( $TmpVersion[ 0 ] == $Sel[ 0 ] && $TmpVersion[ 1 ] > $Sel[ 1 ] ) || 
                        ( $TmpVersion[ 0 ] == $Sel[ 0 ] && $TmpVersion[ 1 ] == $Sel[ 1 ] && 
                              $TmpVersion[ 2 ] > $Sel[ 2 ] )
                  );
            }
            catch( Exception $e )
            {
                  $Args = func_get_args();throw( _get_exception_object( __FUNCTION__ , $Args , $e ) );
            }
      }
      
      function                _check_tmp_version( $Tmp , &$Sel , &$PackageDirectory , &$pi )
      {
            try
            {
                  $TmpVersion = explode( '.' , str_replace( $Tmp , '' , $pi[ 0 ] ) );

                  if( _compare_versions( $TmpVersion , $Sel ) )
                  {
                        $Sel = $TmpVersion;
                        $PackageDirectory = $pi[ 1 ];
                        return( true );
                  }

                  return( false );
            }
            catch( Exception $e )
            {
                  $Args = func_get_args();throw( _get_exception_object( __FUNCTION__ , $Args , $e ) );
            }
      }

      function                _get_package_version( $PackageName , $PackageVersion , $ROOT_DIR = INSTALL_DIR )
      {
            try
            {
                  if( $PackageVersion === 'last' )
                  {
                        $PackagesInfo = _load_packages_list( $ROOT_DIR );
                        $Dir = '';
                        $Sel = array( '0' , '0' , '0' );
                        $Tmp = $PackageName.'.';
                        foreach( $PackagesInfo as $pi )
                        {
                              $FastCheck = $pi[ 0 ][ 0 ] === $Tmp[ 0 ] && strpos( $pi[ 0 ] , $Tmp ) === 0;
                              if( $FastCheck && _check_tmp_version( $Tmp , $Sel , $Dir , $pi ) )
                              {
                                    break;
                              }
                        }
                        $PackageVersion = implode( '.' , $Sel );
                        if( $Dir === '' )
                        {
                              throw( new Exception( 'Package '.$Tmp.$PackageVersion.' was not found' ) );
                        }
                  }
                  return( $PackageVersion );
            }
            catch( Exception $e )
            {
                  $Args = func_get_args();throw( _get_exception_object( __FUNCTION__ , $Args , $e ) );
            }
      }

      function                _get_package_real_version( $PackageName , $PackageVersion , $ROOT_DIR = INSTALL_DIR )
      {
            try
            {
                  global      $PackageRealVersionCache;
                  $Key = "$PackageName $PackageVersion $ROOT_DIR";

                  if( isset( $PackageRealVersionCache[ $Key ] ) === false )
                  {
                        global      $PackageRealVersionCacheChanged;

                        $PackageRealVersionCacheChanged = true;
                  
                        $PackageRealVersionCache[ $Key ] = _get_package_version( $PackageName , $PackageVersion , $ROOT_DIR );
                  }
                  
                  return( $PackageRealVersionCache[ $Key ] );
            }
            catch( Exception $e )
            {
                  $Args = func_get_args();throw( _get_exception_object( __FUNCTION__ , $Args , $e ) );
            }
      }
      
?>