<?php
/*
* 2007-2014 PrestaShop
*
* NOTICE OF LICENSE
*
* This source file is subject to the Academic Free License (AFL 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/afl-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  2007-2014 PrestaShop SA
*  @license    http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

if (!defined('_PS_VERSION_'))
	exit;

class BlockViewed extends Module
{

	public function __construct()
	{
		$this->name = 'blockviewed';
		$this->tab = 'front_office_features';
		$this->version = 1;
		$this->author = 'PrestaShop';
		$this->need_instance = 0;

		$this->bootstrap = true;
		parent::__construct();	

		$this->displayName = $this->l('Viewed products block');
		$this->description = $this->l('Adds a block displaying recently viewed products.');
	}

	public function install()
	{
		$success = (parent::install() && $this->registerHook('header') && Configuration::updateValue('PRODUCTS_VIEWED_NBR', 2));

		if ($success)
		{
			// Hook the module either on the left or right column
			$theme = new Theme(Context::getContext()->shop->id_theme);
			if ((!$theme->default_left_column || !$this->registerHook('leftColumn'))
				&& (!$theme->default_right_column || !$this->registerHook('rightColumn')))
			{
				// If there are no colums implemented by the template, throw an error and uninstall the module
				$this->_errors[] = $this->l('This module need to be hooked in a column and your theme does not implement one');
				parent::uninstall();
				return false;
			}
		}
		return $success;
	}

	public function getContent()
	{
		$output = '';
		if (Tools::isSubmit('submitBlockViewed'))
		{
			if (!($productNbr = Tools::getValue('PRODUCTS_VIEWED_NBR')) || empty($productNbr))
				$output .= $this->displayError($this->l('You must fill in the \'Products displayed\' field.'));
			elseif ((int)($productNbr) == 0)
				$output .= $this->displayError($this->l('Invalid number.'));
			else
			{
				Configuration::updateValue('PRODUCTS_VIEWED_NBR', (int)$productNbr);
				$output .= $this->displayConfirmation($this->l('Settings updated.'));
			}
		}
		return $output.$this->renderForm();
	}

	public function hookRightColumn($params)
	{
		$productsViewed = (isset($params['cookie']->viewed) && !empty($params['cookie']->viewed)) ? array_slice(array_reverse(explode(',', $params['cookie']->viewed)), 0, Configuration::get('PRODUCTS_VIEWED_NBR')) : array();

		if (count($productsViewed))
		{
			$defaultCover = Language::getIsoById($params['cookie']->id_lang).'-default';

			$productIds = implode(',', $productsViewed);
			$productsImages = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
			SELECT MAX(image_shop.id_image) id_image, p.id_product, il.legend, product_shop.active, pl.name, pl.description_short, pl.link_rewrite, cl.link_rewrite AS category_rewrite
			FROM '._DB_PREFIX_.'product p
			'.Shop::addSqlAssociation('product', 'p').'
			LEFT JOIN '._DB_PREFIX_.'product_lang pl ON (pl.id_product = p.id_product'.Shop::addSqlRestrictionOnLang('pl').')
			LEFT JOIN '._DB_PREFIX_.'image i ON (i.id_product = p.id_product)'.
			Shop::addSqlAssociation('image', 'i', false, 'image_shop.cover=1').'
			LEFT JOIN '._DB_PREFIX_.'image_lang il ON (il.id_image = image_shop.id_image)
			LEFT JOIN '._DB_PREFIX_.'category_lang cl ON (cl.id_category = product_shop.id_category_default'.Shop::addSqlRestrictionOnLang('cl').')
			WHERE p.id_product IN ('.$productIds.')
			AND pl.id_lang = '.(int)($params['cookie']->id_lang).'
			AND cl.id_lang = '.(int)($params['cookie']->id_lang).'
			GROUP BY product_shop.id_product'
			);

			$productsImagesArray = array();
			foreach ($productsImages as $pi)
				$productsImagesArray[$pi['id_product']] = $pi;

			$productsViewedObj = array();
			foreach ($productsViewed as $productViewed)
			{
				$obj = (object)'Product';
				if (!isset($productsImagesArray[$productViewed]) || (!$obj->active = $productsImagesArray[$productViewed]['active']))
					continue;
				else
				{
					$obj->id = (int)($productsImagesArray[$productViewed]['id_product']);
					$obj->id_image = (int)$productsImagesArray[$productViewed]['id_image'];
					$obj->cover = (int)($productsImagesArray[$productViewed]['id_product']).'-'.(int)($productsImagesArray[$productViewed]['id_image']);
					$obj->legend = $productsImagesArray[$productViewed]['legend'];
					$obj->name = $productsImagesArray[$productViewed]['name'];
					$obj->description_short = $productsImagesArray[$productViewed]['description_short'];
					$obj->link_rewrite = $productsImagesArray[$productViewed]['link_rewrite'];
					$obj->category_rewrite = $productsImagesArray[$productViewed]['category_rewrite'];
					// $obj is not a real product so it cannot be used as argument for getProductLink()
					$obj->product_link = $this->context->link->getProductLink($obj->id, $obj->link_rewrite, $obj->category_rewrite);

					if (!isset($obj->cover) || !$productsImagesArray[$productViewed]['id_image'])
					{
						$obj->cover = $defaultCover;
						$obj->legend = '';
					}
					$productsViewedObj[] = $obj;
				}
			}

			if (!count($productsViewedObj))
				return;

			$this->smarty->assign(array(
				'productsViewedObj' => $productsViewedObj,
				'mediumSize' => Image::getSize('medium')));

			return $this->display(__FILE__, 'blockviewed.tpl');
		}
		return;
	}

	public function hookLeftColumn($params)
	{
		return $this->hookRightColumn($params);
	}

	public function hookHeader($params)
	{
		$id_product = (int)Tools::getValue('id_product');
		$productsViewed = (isset($params['cookie']->viewed) && !empty($params['cookie']->viewed)) ? array_slice(array_reverse(explode(',', $params['cookie']->viewed)), 0, Configuration::get('PRODUCTS_VIEWED_NBR')) : array();

		if ($id_product && !in_array($id_product, $productsViewed))
		{
			$product = new Product((int)$id_product);
			if ($product->checkAccess((int)$this->context->customer->id))
			{
				if (isset($params['cookie']->viewed) && !empty($params['cookie']->viewed))
					$params['cookie']->viewed .= ','.(int)$id_product;
				else
					$params['cookie']->viewed = (int)$id_product;
			}
		}
		$this->context->controller->addCSS(($this->_path).'blockviewed.css', 'all');
	}
	
	public function renderForm()
	{
		$fields_form = array(
			'form' => array(
				'legend' => array(
					'title' => $this->l('Settings'),
					'icon' => 'icon-cogs'
				),
				'input' => array(
					array(
						'type' => 'text',
						'label' => $this->l('Products to display'),
						'name' => 'PRODUCTS_VIEWED_NBR',
						'class' => 'fixed-width-xs',
						'desc' => $this->l('Define the number of products displayed in this block.')
					),
				),
				'submit' => array(
					'title' => $this->l('Save'),
				)
			),
		);
			
		$helper = new HelperForm();
		$helper->show_toolbar = false;
		$helper->table =  $this->table;
		$lang = new Language((int)Configuration::get('PS_LANG_DEFAULT'));
		$helper->default_form_language = $lang->id;
		$helper->allow_employee_form_lang = Configuration::get('PS_BO_ALLOW_EMPLOYEE_FORM_LANG') ? Configuration::get('PS_BO_ALLOW_EMPLOYEE_FORM_LANG') : 0;
		$helper->identifier = $this->identifier;
		$helper->submit_action = 'submitBlockViewed';
		$helper->currentIndex = $this->context->link->getAdminLink('AdminModules', false).'&configure='.$this->name.'&tab_module='.$this->tab.'&module_name='.$this->name;
		$helper->token = Tools::getAdminTokenLite('AdminModules');
		$helper->tpl_vars = array(
			'fields_value' => $this->getConfigFieldsValues(),
			'languages' => $this->context->controller->getLanguages(),
			'id_language' => $this->context->language->id
		);

		return $helper->generateForm(array($fields_form));
	}
	
	public function getConfigFieldsValues()
	{		
		return array(
			'PRODUCTS_VIEWED_NBR' => Tools::getValue('PRODUCTS_VIEWED_NBR', Configuration::get('PRODUCTS_VIEWED_NBR')),
		);
	}
}
