<?php
// Copyright (C) 2010-2024 Combodo SAS
//
//   This file is part of iTop.
//
//   iTop is free software; you can redistribute it and/or modify
//   it under the terms of the GNU Affero General Public License as published by
//   the Free Software Foundation, either version 3 of the License, or
//   (at your option) any later version.
//
//   iTop 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 Affero General Public License for more details.
//
//   You should have received a copy of the GNU Affero General Public License
//   along with iTop. If not, see <http://www.gnu.org/licenses/>


/**
 * Value set definitions (from a fixed list or from a query, etc.)
 *
 * @copyright   Copyright (C) 2010-2024 Combodo SAS
 * @license     http://opensource.org/licenses/AGPL-3.0
 */

use Combodo\iTop\Core\MetaModel\FriendlyNameType;

require_once('MyHelpers.class.inc.php');

/**
 * ValueSetDefinition
 * value sets API and implementations
 *
 * @package     iTopORM
 */
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;
	}

	/**
	 * @param array  $aArgs
	 * @param string $sContains
	 * @param string $sOperation for the values {@see static::LoadValues()}
	 *
	 * @return array hash array of keys => values
	 */
	public function GetValues($aArgs, $sContains = '', $sOperation = 'contains')
	{
		if (!$this->m_bIsLoaded)
		{
			$this->LoadValues($aArgs);
			$this->m_bIsLoaded = true;
		}
		if (strlen($sContains) == 0)
		{
			// No filtering
			$aRet = $this->m_aValues;
		}
		else
		{
			// Filter on results containing the needle <sContain>
			$aRet = array();
			foreach ($this->m_aValues as $sKey=>$sValue)
			{
				if (stripos($sValue, $sContains) !== false)
				{
					$aRet[$sKey] = $sValue;
				}
			}
		}
		$this->SortValues($aRet);
		return $aRet;
	}

	/**
	 * @param array $aValues Values to sort in the form keys => values
	 *
	 * @return void
	 * @since 3.1.0 N°1646 Create method
	 */
	public function SortValues(array &$aValues): void
	{
		// Sort alphabetically on values
		natcasesort($aValues);
	}

	abstract protected function LoadValues($aArgs);
}


/**
 * Set of existing values for an attribute, given a search filter
 *
 * @package     iTopORM
 */
class ValueSetObjects extends ValueSetDefinition
{
	protected $m_sContains;
	protected $m_sOperation;
	protected $m_sFilterExpr; // in OQL
	protected $m_sValueAttCode;
	protected $m_aOrderBy;
	protected $m_oExtraCondition;
	private $m_bAllowAllData;
	private $m_aModifierProperties;
	private $m_bSort;
	private $m_iLimit;


	/**
	 * @param hash $aOrderBy Array of '[<classalias>.]attcode' => bAscending
	 */
	public function __construct($sFilterExp, $sValueAttCode = '', $aOrderBy = array(), $bAllowAllData = false, $aModifierProperties = array())
	{
		$this->m_sContains = '';
		$this->m_sOperation = '';
		$this->m_sFilterExpr = $sFilterExp;
		$this->m_sValueAttCode = $sValueAttCode;
		$this->m_aOrderBy = $aOrderBy;
		$this->m_bAllowAllData = $bAllowAllData;
		$this->m_aModifierProperties = $aModifierProperties;
		$this->m_oExtraCondition = null;
		$this->m_bSort = true;
		$this->m_iLimit = 0;
	}

	public function SetModifierProperty($sPluginClass, $sProperty, $value)
	{
		$this->m_aModifierProperties[$sPluginClass][$sProperty] = $value;
		$this->m_bIsLoaded = false;
	}

	public function SetCondition(DBSearch $oFilter)
	{
		$this->m_oExtraCondition = $oFilter;
		$this->m_bIsLoaded = false;
	}
	public function SetOrderBy(array $aOrderBy)
	{
		$this->m_aOrderBy = $aOrderBy;
	}
	public function ToObjectSet($aArgs = array(), $sContains = '', $iAdditionalValue = null)
	{
		if ($this->m_bAllowAllData)
		{
			$oFilter = DBObjectSearch::FromOQL_AllData($this->m_sFilterExpr);
		}
		else
		{
			$oFilter = DBObjectSearch::FromOQL($this->m_sFilterExpr);
		}
		if (!is_null($this->m_oExtraCondition))
		{
			$oFilter = $oFilter->Intersect($this->m_oExtraCondition);
		}
		foreach($this->m_aModifierProperties as $sPluginClass => $aProperties)
		{
			foreach ($aProperties as $sProperty => $value)
			{
				$oFilter->SetModifierProperty($sPluginClass, $sProperty, $value);
			}
		}
		if ($iAdditionalValue > 0)
		{
			$oSearchAdditionalValue = new DBObjectSearch($oFilter->GetClass());
			$oSearchAdditionalValue->AddConditionExpression( new BinaryExpression(
			    new FieldExpression('id', $oSearchAdditionalValue->GetClassAlias()),
                '=',
                new VariableExpression('current_extkey_id'))
            );
			$oSearchAdditionalValue->AllowAllData();
			$oSearchAdditionalValue->SetArchiveMode(true);
			$oSearchAdditionalValue->SetInternalParams( array('current_extkey_id' => $iAdditionalValue) );

			$oFilter = new DBUnionSearch(array($oFilter, $oSearchAdditionalValue));
		}

		return new DBObjectSet($oFilter, $this->m_aOrderBy, $aArgs);
	}

    /**
     * @inheritDoc
     * @throws CoreException
     * @throws OQLException
     */
    public function GetValues($aArgs, $sContains = '', $sOperation = 'contains')
	{
		if (!$this->m_bIsLoaded || ($sContains != $this->m_sContains) || ($sOperation != $this->m_sOperation))
		{
			$this->LoadValues($aArgs, $sContains, $sOperation);
			$this->m_bIsLoaded = true;
		}
		// The results are already filtered and sorted (on friendly name)
		$aRet = $this->m_aValues;
		return $aRet;
	}

	/**
	 * @param $aArgs
	 * @param string $sContains
	 * @param string $sOperation 'contains' or 'equals_start_with'
	 *
	 * @return bool
	 * @throws \CoreException
	 * @throws \OQLException
	 */
	protected function LoadValues($aArgs, $sContains = '', $sOperation = 'contains')
	{
		$this->m_sContains = $sContains;
		$this->m_sOperation = $sOperation;

		$this->m_aValues = array();

		$oFilter = $this->GetFilter($sOperation, $sContains);

		$oObjects = new DBObjectSet($oFilter, $this->m_aOrderBy, $aArgs, null, $this->m_iLimit, 0, $this->m_bSort);
		if (empty($this->m_sValueAttCode)) {
			$aAttToLoad = array($oFilter->GetClassAlias() => array('friendlyname'));
		} else {
			$aAttToLoad = array($oFilter->GetClassAlias() => array($this->m_sValueAttCode));
		}
		$oObjects->OptimizeColumnLoad($aAttToLoad);
		while ($oObject = $oObjects->Fetch()) {
			if (empty($this->m_sValueAttCode)) {
				$this->m_aValues[$oObject->GetKey()] = $oObject->GetName();
			} else {
				$this->m_aValues[$oObject->GetKey()] = $oObject->Get($this->m_sValueAttCode);
			}
		}

		return true;
	}


	/**
	 * Get filter for functions LoadValues and LoadValuesForAutocomplete
	 *
	 * @param $sOperation
	 * @param $sContains
	 *
	 * @return \DBObjectSearch|\DBSearch|\DBUnionSearch|false|mixed
	 * @throws \CoreException
	 * @throws \OQLException
	 * @since 3.0.3 3.1.0
	 */
	protected function GetFilter($sOperation, $sContains)
	{
		$this->m_sContains = $sContains;
		$this->m_sOperation = $sOperation;

		if ($this->m_bAllowAllData) {
			$oFilter = DBObjectSearch::FromOQL_AllData($this->m_sFilterExpr);
		} else {
			$oFilter = DBObjectSearch::FromOQL($this->m_sFilterExpr);
			$oFilter->SetShowObsoleteData(utils::ShowObsoleteData());
		}
		if (!$oFilter) {
			return false;
		}
		if (!is_null($this->m_oExtraCondition)) {
			$oFilter = $oFilter->Intersect($this->m_oExtraCondition);
		}
		foreach ($this->m_aModifierProperties as $sPluginClass => $aProperties) {
			foreach ($aProperties as $sProperty => $value) {
				$oFilter->SetModifierProperty($sPluginClass, $sProperty, $value);
			}
		}

		$sClass = $oFilter->GetClass();

		switch ($this->m_sOperation) {
			case 'equals':
			case 'start_with':
				if ($this->m_sOperation === 'start_with') {
					$this->m_sContains .= '%';
					$sOperator = 'LIKE';
				} else {
					$sOperator = '=';
				}

				$aAttributes = MetaModel::GetFriendlyNameAttributeCodeList($sClass);
				if (count($aAttributes) > 0) {
					$sClassAlias = $oFilter->GetClassAlias();
					$aFilters = array();
					$oValueExpr = new ScalarExpression($this->m_sContains);
					foreach ($aAttributes as $sAttribute) {
						$oNewFilter = $oFilter->DeepClone();
						$oNameExpr = new FieldExpression($sAttribute, $sClassAlias);
						$oCondition = new BinaryExpression($oNameExpr, $sOperator, $oValueExpr);
						$oNewFilter->AddConditionExpression($oCondition);
						$aFilters[] = $oNewFilter;
					}
					// Unions are much faster than OR conditions
					$oFilter = new DBUnionSearch($aFilters);
				} else {
					$oValueExpr = new ScalarExpression($this->m_sContains);
					$oNameExpr = new FieldExpression('friendlyname', $oFilter->GetClassAlias());
					$oNewCondition = new BinaryExpression($oNameExpr, $sOperator, $oValueExpr);
					$oFilter->AddConditionExpression($oNewCondition);
				}
				break;

			default:
				$oValueExpr = new ScalarExpression('%'.$this->m_sContains.'%');
				$oNameExpr = new FieldExpression('friendlyname', $oFilter->GetClassAlias());
				$oNewCondition = new BinaryExpression($oNameExpr, 'LIKE', $oValueExpr);
				$oFilter->AddConditionExpression($oNewCondition);
				break;
		}

		return $oFilter;
	}

	public function GetValuesDescription()
	{
		return 'Filter: '.$this->m_sFilterExpr;
	}

	public function GetFilterExpression()
	{
		return $this->m_sFilterExpr;
	}

	/**
	 * @param $iLimit
	 */
	public function SetLimit($iLimit)
	{
		$this->m_iLimit = $iLimit;
	}

	/**
	 * @param $bSort
	 */
	public function SetSort($bSort)
	{
		$this->m_bSort = $bSort;
	}

	public function GetValuesForAutocomplete($aArgs, $sContains = '', $sOperation = 'contains')
	{
		if (!$this->m_bIsLoaded || ($sContains != $this->m_sContains) || ($sOperation != $this->m_sOperation))
		{
			$this->LoadValuesForAutocomplete($aArgs, $sContains, $sOperation);
			$this->m_bIsLoaded = true;
		}
		// The results are already filtered and sorted (on friendly name)
		$aRet = $this->m_aValues;
		return $aRet;
	}

	/**
	 * @param $aArgs
	 * @param string $sContains
	 * @param string $sOperation 'contains' or 'equals_start_with'
	 *
	 * @return bool
	 * @throws \CoreException
	 * @throws \OQLException
	 */
	protected function LoadValuesForAutocomplete($aArgs, $sContains = '', $sOperation = 'contains')
	{
		$this->m_aValues = array();

		$oFilter = $this->GetFilter($sOperation, $sContains);
		$sClass = $oFilter->GetClass();
		$sClassAlias = $oFilter->GetClassAlias();

		$oObjects = new DBObjectSet($oFilter, $this->m_aOrderBy, $aArgs, null, $this->m_iLimit, 0, $this->m_bSort);
		if (empty($this->m_sValueAttCode)) {
			$aAttToLoad = ['friendlyname'];
		} else {
			$aAttToLoad = [$this->m_sValueAttCode];
		}

		$sImageAttr = MetaModel::GetImageAttributeCode($sClass);
		if (!empty($sImageAttr)) {
			$aAttToLoad [] = $sImageAttr;
		}

		$aComplementAttributeSpec = MetaModel::GetNameSpec($sClass, FriendlyNameType::COMPLEMENTARY);
		$sFormatAdditionalField = $aComplementAttributeSpec[0];
		$aAdditionalField = $aComplementAttributeSpec[1];

		if (count($aAdditionalField) > 0) {
			if (is_array($aAdditionalField)) {
				$aAttToLoad = array_merge($aAttToLoad, $aAdditionalField);
			} else {
				$aAttToLoad [] = $aAdditionalField;
			}
		}

		$oObjects->OptimizeColumnLoad([$sClassAlias => $aAttToLoad]);
		while ($oObject = $oObjects->Fetch()) {
			$aData = [];
			if (empty($this->m_sValueAttCode)) {
				$aData['label'] = $oObject->GetName();
			} else {
				$aData['label'] = $oObject->Get($this->m_sValueAttCode);
			}
			if ($oObject->IsObsolete()) {
				$aData['obsolescence_flag'] = '1';
			} else {
				$aData['obsolescence_flag'] = '0';
			}
			if (count($aAdditionalField) > 0) {
				$aArguments = [];
				foreach ($aAdditionalField as $sAdditionalField) {
					array_push($aArguments, $oObject->Get($sAdditionalField));
				}
				$aData['additional_field'] = utils::VSprintf($sFormatAdditionalField, $aArguments);
			} else {
				$aData['additional_field'] = '';
			}
			if (!empty($sImageAttr)) {
				/** @var \ormDocument $oImage */
				$oImage = $oObject->Get($sImageAttr);
				if (!$oImage->IsEmpty()) {
					$aData['picture_url'] = $oImage->GetDisplayURL($sClass, $oObject->GetKey(), $sImageAttr);
					$aData['initials'] = '';
				} else {
					$aData['initials'] = utils::ToAcronym($aData['label']);
				}
			}
			$this->m_aValues[$oObject->GetKey()] = $aData;
		}
		return true;
	}
}


/**
 * Fixed set values (could be hardcoded in the business model)
 *
 * @package     iTopORM
 */
class ValueSetEnum extends ValueSetDefinition
{
	protected $m_values;
	/**
	 * @var bool $bSortByValues If true, values will be sorted at runtime (on their values, not their keys), otherwise it is sorted at compile time in a predefined order.
	 *                         {@see \MFCompiler::CompileAttributeEnumValues()} for complete reasons.
	 * @since 3.1.0 N°1646
	 */
	protected bool $bSortByValues;

	/**
	 * @param array|string $Values
	 * @param bool $bLocalizedSort
	 *
	 * @since 3.1.0 N°1646 Add $bLocalizedSort parameter
	 * @since 3.2.0 N°7157 $Values can be an array of backed-enum cases
	 */
	public function __construct($Values, bool $bSortByValues = false)
	{
		$this->m_values = $Values;
		$this->bSortByValues = $bSortByValues;
	}

	/**
	 * @see \ValueSetEnum::$bSortByValues
	 * @return bool
	 * @since 3.1.0 N°1646
	 */
	public function IsSortedByValues(): bool
	{
		return $this->bSortByValues;
	}

	// Helper to export the data model
	public function GetValueList()
	{
		$this->LoadValues(null);
		return $this->m_aValues;
	}

	/**
	 * @inheritDoc
	 * @since 3.1.0 N°1646 Overload method
	 */
	public function SortValues(array &$aValues): void
	{
		// Force sort by values only if necessary
		if ($this->bSortByValues) {
			natcasesort($aValues);
			return;
		}

		// Don't sort values as we rely on the order defined during compilation
		return;
	}

	/**
	 * @param array|string $aArgs
	 *
	 * @return true
	 */
	protected function LoadValues($aArgs)
	{
		$aValues = [];
		if (is_array($this->m_values))
		{
			foreach ($this->m_values as $key => $value) {
				// Handle backed-enum case
				if (is_object($value) && enum_exists(get_class($value))) {
					$aValues[$value->value] = $value->value;
					continue;
				}

				$aValues[$key] = $value;
			}
		}
		elseif (is_string($this->m_values) && strlen($this->m_values) > 0)
		{
			foreach (explode(",", $this->m_values) as $sVal)
			{
				$sVal = trim($sVal);
				$sKey = $sVal;
				$aValues[$sKey] = $sVal;
			}
		}
		else
		{
			$aValues = [];
		}
		$this->m_aValues = $aValues;
		return true;
	}
}

class ValueSetEnumPadded extends ValueSetEnum
{
	/**
	 * @inheritDoc
	 * @since 3.1.0 N°6448 Add $bSortByValues parameter
	 */
	public function __construct($Values, bool $bSortByValues = false)
	{
		parent::__construct($Values, $bSortByValues);
		if (is_string($Values))
		{
			$this->LoadValues(null);
		}
		else
		{
			$this->m_aValues = $Values;
		}
		$aPaddedValues = array();
		foreach ($this->m_aValues as $sKey => $sVal)
		{
			// Pad keys to the min. length required by the \AttributeSet
			$sKey = str_pad($sKey, 3, '_', STR_PAD_LEFT);
			$aPaddedValues[$sKey] = $sVal;
		}
		$this->m_values = $aPaddedValues;
	}
}

/**
 * Fixed set values, defined as a range: 0..59 (with an optional increment)
 *
 * @package     iTopORM
 */
class ValueSetRange extends ValueSetDefinition
{
	protected $m_iStart;
	protected $m_iEnd;

	public function __construct($iStart, $iEnd, $iStep = 1)
	{
		$this->m_iStart = $iStart;
		$this->m_iEnd = $iEnd;
		$this->m_iStep = $iStep;
	}

	protected function LoadValues($aArgs)
	{
		$iValue = $this->m_iStart;
		for($iValue = $this->m_iStart; $iValue <= $this->m_iEnd; $iValue += $this->m_iStep)
		{
			$this->m_aValues[$iValue] = $iValue;
		}
		return true;
	}
}


/**
 * Data model classes
 *
 * @package     iTopORM
 */
class ValueSetEnumClasses extends ValueSetEnum
{
	protected $m_sCategories;

	public function __construct($sCategories = '', $sAdditionalValues = '')
	{
		$this->m_sCategories = $sCategories;
		parent::__construct($sAdditionalValues, true /* Classes are always sorted alphabetically */);
	}

	protected function LoadValues($aArgs)
	{
		// Call the parent to parse the additional values...
		parent::LoadValues($aArgs);

		// Translate the labels of the additional values
		foreach($this->m_aValues as $sClass => $void)
		{
			if (MetaModel::IsValidClass($sClass))
			{
				$this->m_aValues[$sClass] = MetaModel::GetName($sClass);
			}
			else
			{
				unset($this->m_aValues[$sClass]);
			}
		}

		// Then, add the classes from the category definition
		foreach (MetaModel::GetClasses($this->m_sCategories) as $sClass)
		{
			if (MetaModel::IsValidClass($sClass))
			{
				$this->m_aValues[$sClass] = MetaModel::GetName($sClass);
			}
			else
			{
				unset($this->m_aValues[$sClass]);
			}
		}

		return true;
	}
}
