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TreeNode.inc.php
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Wed, May 29, 12:03

TreeNode.inc.php
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<?
## $Id$
## This file is part of the CERN Document Server Software (CDSware).
## Copyright (C) 2002, 2003, 2004, 2005, 2006 CERN.
##
## The CDSware is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation; either version 2 of the
## License, or (at your option) any later version.
##
## The CDSware is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with CDSware; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
//==========================================================================
// File: TreeNode.inc (flexElink core)
// Classes: Condition
// Atribs
// Node
// Requires:
// Included:
//==========================================================================
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Class: Condition
// Purpose:
// Attributes:
// Methods:
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
class Condition {
var $atname;
var $atvalue;
function Condition( $atname, $atvalue="" )
{
$this->atname=$atname;
$this->atvalue=trim($atvalue);
}
function pass( $atname, $atvalue="" )
{
$atvalue=trim($atvalue);
//$atname=strtoupper( trim( $atname ) );
$atname=trim( $atname );
return (($atname==$this->atname) && ($atvalue==$this->atvalue));
}
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Class: Atribs
// Purpose:
// Attributes:
// Methods:
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
class Atribs {
var $name="";
var $vars;
function Atribs($name, $var="")
{
$this->name=$name;
$this->vars=array();
if($var!="")
$this->addVar($var);
}
function addVar($varname)
{
if(!in_array(trim($varname), array_values($this->vars)))
array_push($this->vars, trim($varname));
}
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Class: Node
// Purpose:
// Attributes:
// Methods:
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
class Node {
var $tag; //string contining the tag name
var $vars; //array which contains variable to set up with
// the text of the tag
var $sons; //array which will keep all the references to son nodes
var $parent; //reference to the parent node
var $atribs; //array contianing references to atribute objects
var $conditions; //array containing conditions needed for entering
// this node
function &Node($tagname, & $parent)
{
$this->tag=trim($tagname);
$this->parent= & $parent;
$this->sons=array();
$this->atribs=array();
$this->vars=array();
$this->conditions=array();
return $this;
}
function addAtrib( $name, $intvar)
{
//$atribname=strtoupper(trim($name));
$atribname=trim($name);
$intvar=strtoupper(trim($intvar));
if(!in_array($atribname, array_keys($this->atribs)))
$this->atribs[ $atribname ]=new Atribs( $atribname );
$this->atribs[ $atribname ]->addVar( $intvar );
}
function addCondition( $atname, $atvalue="" )
{
//$atname=strtoupper(trim($atname));
$atname=trim($atname);
//As XML only allows an attribute to appear once in each TAG,
// the condition list with more than one attrib that has the same
// name, won't make sense, so the criteria for looking if a
// condition is already inserted is looking for the attrib name.
//In case various attrib values are specified for one attribute name,
// the first one will remain
if(!in_array($atname, array_keys($this->conditions)))
$this->conditions[ $atname ]=new Condition( $atname, $atvalue );
}
function & son( $name, $conditions=null )
{
$idx=0;
while($idx<=(count($this->sons)-1))
{
$temp=& $this->sons[$idx];
if($temp->matchId( $name, $conditions ))
{
return $temp;
}
$idx++;
}
return null;
}
function & atrib($name)
{
//return ($this->atribs[strtoupper(trim($name))]);
return ($this->atribs[trim($name)]);
}
function matchId ( $tagname, $conditions=null )
{
//$tagname=trim(strtoupper($tagname));
$tagname=trim($tagname);
//First let's see if tag names match
if ( $tagname!=$this->tag ) return 0;
if ( $conditions==null )
$conditions=array();
$acond=array();
foreach($conditions as $key=>$value)
{
//$acond[strtoupper($key)]=$value;
$acond[$key]=$value;
}
//Then let's check if it has same conditions
if($this->tag==$tagname)
{
//Then we have to see if the node has exactly the same conditions
foreach($acond as $key=>$value)
{
if (!($this->hasCondition($key, $value))) return 0;
}
//Now we need to check if the node condition is in the parameter
foreach($this->conditions as $cond)
{
if (!(in_array($cond->atname, array_keys($acond))))
return 0;
if (!($cond->pass($cond->atname, $acond[$cond->atname])))
return 0;
}
}
return 1;
}
function addSon( $tagname, $conditions=null )
{
//$tag=strtoupper(trim($tagname));
$tag=trim($tagname);
if($conditions==null)
$conditions=array();
if(!$this->hasSon( $tagname, $conditions ))
{
$temp = & new Node( $tag, $this );
foreach($conditions as $key=>$value)
$temp->addCondition($key, $value);
array_push($this->sons, & $temp);
}
}
function addVariable( $varname )
{
if(!in_array( trim($varname), $this->vars))
array_push($this->vars, trim($varname));
}
function hasSon( $tagname, $conditions=null )
{
//There could be more than one son with the same tagname
foreach($this->sons as $temp)
{
if($temp->matchId( $tagname, $conditions))
return 1;
}
return 0;
}
function hasVariables()
{
return (count($this->vars)>0);
}
function hasAtribs()
{
return (count($this->atribs));
}
function hasAtrib( $atname )
{
//$atname=strtoupper(trim($atname));
$atname=trim($atname);
return in_array($atname, array_keys($this->atribs));
}
function hasCondition( $atname, $atvalue="" )
{
//$atname=strtoupper(trim($atname));
$atname=trim($atname);
if(in_array($atname, array_keys($this->conditions)))
if(!$atvalue)
return 1;
else
return ($this->conditions[$atname]->pass($atname, $atvalue));
return 0;
}
function & descend( $tag, $cond )
{
foreach($this->sons as $key=>$temp)
{
//if(strtoupper(trim($tag))==$temp->tag)
if(trim($tag)==$temp->tag)
{
if($temp->passConditions( $cond ))
{
return $temp;
}
}
}
return null;
}
function passConditions( $a )
{ //This method tells if the node pass the conditions according with the
// assoc array which is passed as parameter. This array will contain
// the atribute names as indexes, and the atribute values as values.
//To pass the conditions means that all the conditions in the node have
// be present in the array parameter
//If there is no condition in the node, is passed
if (!$this->conditions)
return 1;
//If there is any condition in the node but not in the parameter is
// not passed
if (($this->conditions) && (!$a))
return 0;
//Any other case, we'll have to compare individually
foreach($this->conditions as $atname=>$atvalue)
{
if (!in_array($atname, array_keys( $a )))
{
return 0;
}
if (!$atvalue->pass( $atname, $a[ $atname ]))
{
return 0;
}
}
return 1;
}
function output()
{
print "Actual node: ".$this->tag."(".$this->parent->tag.")<br>";
print "Sons: ".array2str(array_keys($this->sons))."<br>";
print "Variables: ".array2str(array_values($this->vars))."<br>";
print "Atribs: ".array2str(array_keys($this->atribs))."<br>";
print "Conditions: ".array2str(array_keys($this->conditions))."<br>";
reset($this->sons);
while(current($this->sons)){
$temp=current($this->sons);
$temp->output();
next($this->sons);
}
}
}
//----------------------------------------------------------------------
?>

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