<?php

/**
 * ValueSetDefinition
 * value sets API and implementations
 *
 * @package     iTopORM
 * @author      Romain Quetiez <romainquetiez@yahoo.fr>
 * @author      Denis Flaven <denisflave@free.fr>
 * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
 * @link        www.itop.com
 * @since       1.0
 * @version     1.1.1.1 $
 */

require_once('MyHelpers.class.inc.php');

abstract class ValueSetDefinition
{
	protected $m_bIsLoaded = false;
	protected $m_aValues = array();


	// Displayable description that could be computed out of the std usage context
	public function GetValuesDescription()
	{
		$aValues = $this->GetValues(array(), '');
		$aDisplayedValues = array();
		foreach($aValues as $key => $value)
		{
			$aDisplayedValues[] = "$key => $value";
		}
		$sAllowedValues = implode(', ', $aDisplayedValues);
		return $sAllowedValues;
	}


	public function GetValues($aArgs, $sBeginsWith)
	{
		if (!$this->m_bIsLoaded)
		{
			$this->LoadValues($aArgs);
			$this->m_bIsLoaded = true;
		}
		if (strlen($sBeginsWith) == 0)
		{
			$aRet = $this->m_aValues;
		}
		else
		{
			$iCheckedLen = strlen($sBeginsWith);
			$sBeginsWith = strtolower($sBeginsWith);
			$aRet = array();
			foreach ($this->m_aValues as $sKey=>$sValue)
			{
				if (strtolower(substr($sValue, 0, $iCheckedLen)) == $sBeginsWith)
				{
					$aRet[$sKey] = $sValue;
				}
			}
		}
		return $aRet;
	}

	abstract protected function LoadValues($aArgs);
}


/**
 * Set of existing values for an attribute, given a search filter 
 *
 * @package     iTopORM
 * @author      Romain Quetiez <romainquetiez@yahoo.fr>
 * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
 * @link        www.itop.com
 * @since       1.0
 * @version     $itopversion$
 */
class ValueSetObjects extends ValueSetDefinition
{
	protected $m_sFilterExpr; // in SibuSQL
	protected $m_sValueAttCode;
	protected $m_aOrderBy;

	public function __construct($sFilterExp, $sValueAttCode = '', $aOrderBy = array())
	{
		$this->m_sFilterExpr = $sFilterExp;
		$this->m_sValueAttCode = $sValueAttCode;
		$this->m_aOrderBy = $aOrderBy;
	}

	protected function LoadValues($aArgs)
	{
		$this->m_aValues = array();
		
		$oFilter = DBObjectSearch::FromSibusQL($this->m_sFilterExpr, $aArgs);
		if (!$oFilter) return false;

		if (empty($this->m_sValueAttCode))
		{
			$this->m_sValueAttCode = MetaModel::GetNameAttributeCode($oFilter->GetClass());
		}

		$oObjects = new DBObjectSet($oFilter, $this->m_aOrderBy, $aArgs);
		while ($oObject = $oObjects->Fetch())
		{
			$this->m_aValues[$oObject->GetKey()] = $oObject->GetAsHTML($this->m_sValueAttCode);
		}
		return true;
	}
	
	public function GetValuesDescription()
	{
		return 'Filter: '.$this->m_sFilterExpr;
	}
}


/**
 * Fixed set values (could be hardcoded in the business model) 
 *
 * @package     iTopORM
 * @author      Romain Quetiez <romainquetiez@yahoo.fr>
 * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
 * @link        www.itop.com
 * @since       1.0
 * @version     $itopversion$
 */
class ValueSetEnum extends ValueSetDefinition
{
	public function __construct($Values)
	{
		if (is_array($Values))
		{
			$aValues = $Values;
		}
		else
		{
			$aValues = array();
			foreach (explode(",", $Values) as $sVal)
			{
				$sVal = trim($sVal);
				$sKey = $sVal; 
				$aValues[$sKey] = $sVal;
			}
		}
		$this->m_aValues = $aValues;
	}

	protected function LoadValues($aArgs)
	{
		return true;
	}
}


/**
 * Data model classes 
 *
 * @package     iTopORM
 * @author      Romain Quetiez <romainquetiez@yahoo.fr>
 * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
 * @link        www.itop.com
 * @since       1.0
 * @version     $itopversion$
 */
class ValueSetEnumClasses extends ValueSetEnum
{
	public function __construct($sCategory = '', $sAdditionalValues = '')
	{
		// First, build it from the series of additional values
		parent::__construct($sAdditionalValues);

		// Second: add the list of classes
		foreach (MetaModel::GetClasses($sCategory) as $sClass)
		{
			$this->m_aValues[$sClass] = MetaModel::GetName($sClass);
		}
	}

	protected function LoadValues($aArgs)
	{
		return true;
	}
}

?>