<?php

/*
**************************************************
Class: XMLConfig_Strategy.php
**************************************************
Author: Tsiavos Chris <hide@address.com>
Date: October 2004
**************************************************/

/**
*Includes:
*-the ConfigStrategy Interface
*-the ConfigData class, the common communication structure between 
*ConfigStrategy objects and ConfigParser
*/
require_once("ConfigStrategy_Interface.php");

/**
*Strategy for importing configuration data from XML Files
*@uses SimpleXML Extension
*@author Tsiavos Chris <hide@address.com>
*@license http://opensource.org/licenses/gpl-license.php GNU Public License
*/
class XMLConfig_Strategy implements ConfigStrategy_Interface {

	private $XMLHandler;	

	public function initialize($params=NULL) 
	{
		$filename=$params["filename"];
		
		if (!file_exists($filename))
			throw new ConfigStrategy_Exception("XMLConfig_Strategy: File $filename not found");
			
		$this->XMLHandler=simplexml_load_file($filename);
	}
	
	public function readData($params=NULL) 
	{
		$ConfigData=new ConfigData();
		$ConfigData->ImageWidth=(integer)$this->XMLHandler->ImageProperties->Width;
		$ConfigData->ImageHeight=(integer)$this->XMLHandler->ImageProperties->Height;
		$ConfigData->ImageOutputType=(string)$this->XMLHandler->ImageProperties->Output;
		$ConfigData->ImageColor_Start=(string)$this->XMLHandler->ImageProperties->ImageColor->StartColor;
		$ConfigData->ImageColor_Finish=(string)$this->XMLHandler->ImageProperties->ImageColor->FinishColor;
		$ConfigData->ImageColor_Alpha=(integer)$this->XMLHandler->ImageProperties->ImageColor['alpha'];
		
		$ConfigData->ChartTitle=(string)$this->XMLHandler->ChartProperties->Title;
		$ConfigData->ChartType=(string)$this->XMLHandler->ChartProperties->Type;
		$ConfigData->ChartUseBlending=(string)$this->XMLHandler->ChartProperties->Blending;
		$ConfigData->ChartUseAntialias=(string)$this->XMLHandler->ChartProperties->Antialiasing;
		$ConfigData->ChartHmargin=(integer)$this->XMLHandler->ChartProperties->Hmargin;
		$ConfigData->ChartVmargin=(integer)$this->XMLHandler->ChartProperties->Vmargin;
		$ConfigData->ChartUseStatus=(string)$this->XMLHandler->ChartProperties->StatusIndication;
		$ConfigData->ChartColor_Start=(string)$this->XMLHandler->ChartProperties->ChartColor->StartColor;
		$ConfigData->ChartColor_Finish=(string)$this->XMLHandler->ChartProperties->ChartColor->FinishColor;
		$ConfigData->ChartColor_Alpha=(integer)$this->XMLHandler->ChartProperties->ChartColor['alpha'];
		$ConfigData->ChartBgImage=(string)$this->XMLHandler->ChartProperties->BackgroundImage->FileLocation;
		
		$LegendColors=array();
		$LegendColors_Alpha=array();
		
		foreach ($this->XMLHandler->ChartProperties->Legend->Items->Item as $item) {
			array_push($LegendColors,(string)$item->StartColor.",".(string)$item->FinishColor);
			array_push($LegendColors_Alpha,(integer)$item['alpha']);
		}
		
		$ConfigData->LegendColors=$LegendColors;
		$ConfigData->LegendColors_Alpha=$LegendColors_Alpha;
		
		$ConfigData->FontFileLocation=(string)$this->XMLHandler->ChartProperties->Font->FileLocation;
		$ConfigData->FontColor=(string)$this->XMLHandler->ChartProperties->Font->Color;
		$ConfigData->FontWidth=(integer)$this->XMLHandler->ChartProperties->Font->Width;
		$ConfigData->FontHeight=(integer)$this->XMLHandler->ChartProperties->Font->Height;
		$ConfigData->FontSize=(integer)$this->XMLHandler->ChartProperties->Font->Size;
		
		$ConfigData->GridNum=(integer)$this->XMLHandler->GridProperties->NumGrids;
		$ConfigData->GridMinValue=(float)$this->XMLHandler->GridProperties->MinValue;
		$ConfigData->GridMaxValue=(float)$this->XMLHandler->GridProperties->MaxValue;
		$ConfigData->GridColor=(string)$this->XMLHandler->GridProperties->GridColor;
		
		return $ConfigData;
	}

	public function finalize() 
	{
		return;
	}


}