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Name File: AttributeGroup.php

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<?php
/*
* 2007-2013 PrestaShop
*
* NOTICE OF LICENSE
*
* This source file is subject to the Open Software License (OSL 3.0)
* that is bundled with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://opensource.org/licenses/osl-3.0.php
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@prestashop.com so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade PrestaShop to newer
* versions in the future. If you wish to customize PrestaShop for your
* needs please refer to http://www.prestashop.com for more information.
*
*  @author PrestaShop SA <contact@prestashop.com>
*  @copyright  2007-2013 PrestaShop SA
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

class AttributeGroupCore extends ObjectModel
{
 	/** @var string Name */
	public $name;
	public $is_color_group;
	public $position;
	public $group_type;

	/** @var string Public Name */
	public $public_name;

	/**
	 * @see ObjectModel::$definition
	 */
	public static $definition = array(
		'table' => 'attribute_group',
		'primary' => 'id_attribute_group',
		'multilang' => true,
		'fields' => array(
			'is_color_group' => array('type' => self::TYPE_BOOL, 'validate' => 'isBool'),
			'group_type' => 	array('type' => self::TYPE_STRING, 'required' => true),
			'position' => 		array('type' => self::TYPE_INT, 'validate' => 'isInt'),

			// Lang fields
			'name' => 			array('type' => self::TYPE_STRING, 'lang' => true, 'validate' => 'isGenericName', 'required' => true, 'size' => 64),
			'public_name' => 	array('type' => self::TYPE_STRING, 'lang' => true, 'validate' => 'isGenericName', 'required' => true, 'size' => 64),
		),
	);


	protected $webserviceParameters = array(
		'objectsNodeName' => 'product_options',
		'objectNodeName' => 'product_option',
		'fields' => array(),
		'associations' => array(
			'product_option_values' => array(
				'resource' => 'product_option_value',
				'fields' => array(
					'id' => array()
				),
			),
		),
	);

	public function add($autodate = true, $nullValues = false)
	{
		if ($this->position <= 0)
			$this->position = AttributeGroup::getHigherPosition() + 1;

		$return = parent::add($autodate, true);
		Hook::exec('actionAttributeGroupSave', array('id_attribute_group' => $this->id));
		return $return;
	}

	public function update($nullValues = false)
	{
		$return = parent::update($nullValues);
		Hook::exec('actionAttributeGroupSave', array('id_attribute_group' => $this->id));
		return $return;
	}

	public static function cleanDeadCombinations()
	{
		$attribute_combinations = Db::getInstance()->executeS('
			SELECT pac.`id_attribute`, pa.`id_product_attribute`
			FROM `'._DB_PREFIX_.'product_attribute` pa
			LEFT JOIN `'._DB_PREFIX_.'product_attribute_combination` pac
				ON (pa.`id_product_attribute` = pac.`id_product_attribute`)
		');
		$to_remove = array();
		foreach ($attribute_combinations as $attribute_combination)
			if ((int)$attribute_combination['id_attribute'] == 0)
				$to_remove[] = (int)$attribute_combination['id_product_attribute'];
		$return = true;
		if (!empty($to_remove))
			foreach ($to_remove as $remove)
			{
				$combination = new Combination($remove);
				$return &= $combination->delete();
			}
		return $return;
	}

	public function delete()
	{
		if (!$this->hasMultishopEntries())
		{
			/* Select children in order to find linked combinations */
			$attribute_ids = Db::getInstance()->executeS('
				SELECT `id_attribute`
				FROM `'._DB_PREFIX_.'attribute`
				WHERE `id_attribute_group` = '.(int)$this->id
			);
			if ($attribute_ids === false)
				return false;
			/* Removing attributes to the found combinations */
			$to_remove = array();
			foreach ($attribute_ids as $attribute)
				$to_remove[] = (int)$attribute['id_attribute'];
			if (!empty($to_remove) && Db::getInstance()->execute('
				DELETE FROM `'._DB_PREFIX_.'product_attribute_combination`
				WHERE `id_attribute`
					IN ('.implode(', ', $to_remove).')') === false)
				return false;
			/* Remove combinations if they do not possess attributes anymore */
			if (!AttributeGroup::cleanDeadCombinations())
				return false;
		 	/* Also delete related attributes */
			if (Db::getInstance()->execute('
				DELETE FROM `'._DB_PREFIX_.'attribute_lang`
				WHERE `id_attribute`
					IN (SELECT id_attribute FROM `'._DB_PREFIX_.'attribute` WHERE `id_attribute_group` = '.(int)$this->id.')') === false ||
					Db::getInstance()->execute('DELETE FROM `'._DB_PREFIX_.'attribute` WHERE `id_attribute_group` = '.(int)$this->id) === false)
				return false;
			$this->cleanPositions();
		}
		$return = parent::delete();
		if ($return)
			Hook::exec('actionAttributeGroupDelete', array('id_attribute_group' => $this->id));
		return $return;
	}

	/**
	 * Get all attributes for a given language / group
	 *
	 * @param integer $id_lang Language id
	 * @param boolean $id_attribute_group Attribute group id
	 * @return array Attributes
	 */
	public static function getAttributes($id_lang, $id_attribute_group)
	{
		if (!Combination::isFeatureActive())
			return array();
		return Db::getInstance()->executeS('
			SELECT *
			FROM `'._DB_PREFIX_.'attribute` a
			'.Shop::addSqlAssociation('attribute', 'a').'
			LEFT JOIN `'._DB_PREFIX_.'attribute_lang` al
				ON (a.`id_attribute` = al.`id_attribute` AND al.`id_lang` = '.(int)$id_lang.')
			WHERE a.`id_attribute_group` = '.(int)$id_attribute_group.'
			ORDER BY `position` ASC
		');
	}

	/**
	 * Get all attributes groups for a given language
	 *
	 * @param integer $id_lang Language id
	 * @return array Attributes groups
	 */
	public static function getAttributesGroups($id_lang)
	{
		if (!Combination::isFeatureActive())
			return array();

		return Db::getInstance()->executeS('
			SELECT DISTINCT agl.`name`, ag.*, agl.*
			FROM `'._DB_PREFIX_.'attribute_group` ag
			'.Shop::addSqlAssociation('attribute_group', 'ag').'
			LEFT JOIN `'._DB_PREFIX_.'attribute_group_lang` agl
				ON (ag.`id_attribute_group` = agl.`id_attribute_group` AND `id_lang` = '.(int)$id_lang.')
			ORDER BY `name` ASC
		');
	}

	/**
	 * Delete several objects from database
	 *
	 * return boolean Deletion result
	 */
	public function deleteSelection($selection)
	{
		/* Also delete Attributes */
		foreach ($selection as $value)
		{
			$obj = new AttributeGroup($value);
			if (!$obj->delete())
				return false;
		}
		return true;
	}

	public function setWsProductOptionValues($values)
	{
		$ids = array();
		foreach ($values as $value)
			$ids[] = intval($value['id']);
		Db::getInstance()->execute('
			DELETE FROM `'._DB_PREFIX_.'attribute`
			WHERE `id_attribute_group` = '.(int)$this->id.'
			AND `id_attribute` NOT IN ('.implode(',', $ids).')'
		);
		$ok = true;
		foreach ($values as $value)
		{
			$result = Db::getInstance()->execute('
				UPDATE `'._DB_PREFIX_.'attribute`
				SET `id_attribute_group` = '.(int)$this->id.'
				WHERE `id_attribute` = '.(int)$value['id']
			);
			if ($result === false)
				$ok = false;
		}
		return $ok;
	}

	public function getWsProductOptionValues()
	{
		$result = Db::getInstance()->executeS('
			SELECT a.id_attribute AS id
			FROM `'._DB_PREFIX_.'attribute` a
			'.Shop::addSqlAssociation('attribute', 'a').'
			WHERE a.id_attribute_group = '.(int)$this->id
		);
		return $result;
	}

	/**
	 * Move a group attribute
	 * @param boolean $way Up (1)  or Down (0)
	 * @param integer $position
	 * @return boolean Update result
	 */
	public function updatePosition($way, $position)
	{
		if (!$res = Db::getInstance()->executeS('
			SELECT ag.`position`, ag.`id_attribute_group`
			FROM `'._DB_PREFIX_.'attribute_group` ag
			WHERE ag.`id_attribute_group` = '.(int)Tools::getValue('id_attribute_group', 1).'
			ORDER BY ag.`position` ASC'
		))
			return false;

		foreach ($res as $group_attribute)
			if ((int)$group_attribute['id_attribute_group'] == (int)$this->id)
				$moved_group_attribute = $group_attribute;

		if (!isset($moved_group_attribute) || !isset($position))
			return false;

		// < and > statements rather than BETWEEN operator
		// since BETWEEN is treated differently according to databases
		return (Db::getInstance()->execute('
			UPDATE `'._DB_PREFIX_.'attribute_group`
			SET `position`= `position` '.($way ? '- 1' : '+ 1').'
			WHERE `position`
			'.($way
				? '> '.(int)$moved_group_attribute['position'].' AND `position` <= '.(int)$position
				: '< '.(int)$moved_group_attribute['position'].' AND `position` >= '.(int)$position)
		) && Db::getInstance()->execute('
			UPDATE `'._DB_PREFIX_.'attribute_group`
			SET `position` = '.(int)$position.'
			WHERE `id_attribute_group`='.(int)$moved_group_attribute['id_attribute_group'])
		);
	}

	/**
	 * Reorder group attribute position
	 * Call it after deleting a group attribute.
	 *
	 * @return bool $return
	 */
	public static function cleanPositions()
	{
		$return = true;

		$sql = '
			SELECT `id_attribute_group`
			FROM `'._DB_PREFIX_.'attribute_group`
			ORDER BY `position`';
		$result = Db::getInstance()->executeS($sql);

		$i = 0;
		foreach ($result as $value)
			$return = Db::getInstance()->execute('
				UPDATE `'._DB_PREFIX_.'attribute_group`
				SET `position` = '.(int)$i++.'
				WHERE `id_attribute_group` = '.(int)$value['id_attribute_group']
			);
		return $return;
	}

	/**
	 * getHigherPosition
	 *
	 * Get the higher group attribute position
	 *
	 * @return integer $position
	 */
	public static function getHigherPosition()
	{
		$sql = 'SELECT MAX(`position`)
				FROM `'._DB_PREFIX_.'attribute_group`';
		$position = DB::getInstance()->getValue($sql);
		return (is_numeric($position)) ? $position : -1;
	}
}