toutpratique/modules/cms_pack/cms_pack.php

<?php
if (!defined('_CAN_LOAD_FILES_'))
	exit;

include_once dirname(__FILE__).'/classes/CmsPack.php';

class Cms_Pack extends Module
{
	public static $cache_reductionAvailable; 
	public static $cache_pack; 

	public function __construct()
	{
		$this->name = 'cms_pack';
		$this->tab = 'front_office_features';
		$this->version = '1.0';
		$this->author = 'Antadis';
		$this->need_instance = 0;

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

		$this->displayName = $this->l('Product pack for CMS ANTADIS');
		$this->description = $this->l('Manage your product pack in CMS Antadis');
		$this->secure_key = Tools::encrypt($this->name);
		$this->ps_versions_compliancy = array('min' => '1.6', 'max' => _PS_VERSION_);
	}

	public function install()
	{
		if (Shop::isFeatureActive())
			Shop::setContext(Shop::CONTEXT_ALL);

		if (!parent::install()
			|| !$this->createTables()
			|| !$this->registerHook('footer')
			|| !$this->registerHook('displayBottomProductCms')
			|| !$this->registerHook('displayleftPostCms')
		)
			return false;
	}

	public function createTables (){
		return true;
	}

	public function hookdisplayFooter() {
		$this->context->controller->addJS(($this->_path).'pack.js', 'all');
		return $this->display(__FILE__, 'lightbox_footer.tpl');
	}

	public function hookdisplayleftPostCms($params) {
		$pack = $this->loadPackForCMS($params['id_cmspost']);
		
		if($pack) {
			$this->smarty->assign(array(
				'pack'					=>	$pack,
				'id_cms_category'		=>	$params['id_cms_category'],
				'reductionAvailable'	=>	self::$cache_reductionAvailable,
			));
			return $this->display(__FILE__, 'pack_left.tpl');			
		}
	}
	public function hookdisplayBottomProductCms($params) {		
		$pack = $this->loadPackForCMS($params['id_cmspost']);

		if ($pack) {
			$this->smarty->assign(array(
				'pack'					=>	$pack,
				'id_cms_category'		=>	$params['id_cms_category'],
				'reductionAvailable'	=>	self::$cache_reductionAvailable,
			));
			return $this->display(__FILE__, 'pack_bottom.tpl');
		}
	}

	public function loadPackForCMS($id_cmspost) 
	{
		if(empty(self::$cache_pack))
		{
			$id_pack = 	Db::getInstance()->getValue('
				SELECT `id_pack`
				FROM `'._DB_PREFIX_.'cmsps_posts_relation_pack`
				WHERE `id_post` = '.(int)$id_cmspost
			);
			$result = array();
			$id_lang = Context::getContext()->language->id;
			if ($id_pack) {
				$pack = new CmsPack((int) $id_pack);
				if (!Validate::isLoadedObject($pack)) {
					return false;
				}
				
				$pack->loadProducts();
					
				$collection_product = new Collection('Product', $id_lang);
				$collection_product->where('id_product', 'IN', $pack->products);
				$collection_product->where('active', '=', 1);
			 	$products = $collection_product->getResults();

			 	$products = array_map(function($product) {
			 		return $product->loadReductionInfo();
			 	}, $products);
			 	$result['products'] = $products;

				$price = array_map(function($product) {
					return floatval($product->price);
				}, $result['products']);
				$result['price_total'] = array_sum($price);

				$result['pack']	= $pack->title;

				if ($pack->id_cart_rule) {
					$result['remise'] = true;
					$result['remise_percent'] = $pack->getPercentageReduction();
				} else {
					$result['remise']= false;
				}
			}

			self::$cache_pack = $result;
		}

		// On check si tous les produits sont en stock pour afficher ou non la réduction
		if(empty(self::$cache_reductionAvailable) && isset(self::$cache_pack['products']))
		{
			self::$cache_reductionAvailable = true;
			foreach(self::$cache_pack['products'] as $product)
			{
				if($product->quantity == 0)
				{
					self::$cache_reductionAvailable = false;
					continue;
				}
			}
		}

		return self::$cache_pack;
	}
}