bebeboutik/modules/privatesales_similarproducts/privatesales_similarproducts.php

<?php
//if (!defined('_PS_VERSION_'))
//	exit;
	
class Privatesales_similarproducts extends Module
{
	private $_html = '';
	private $_postErrors = array();
	private $hooks = array(
			'similarProduct' => array('Accessories or similar products', 'Called on displaying similar product in product details'),
		);

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

		parent::__construct();

		$this->displayName = $this->l('Produits complémentaires ou similaires');
		$this->description = $this->l('Ajoute un bloc affichant les produits complémentaires (accessoires) ou les meilleures ventes de la famille d\'un produit.');
	}

	/**
	 * @see ModuleCore::install()
	 */
	public function install()
	{
		// Add custom hooks
		foreach($this->hooks as $k => $v) {
			if(count(Db::getInstance()->ExecuteS('
				SELECT `id_hook`
				FROM `'._DB_PREFIX_.'hook`
				WHERE `name` = "'.$k.'"
				LIMIT 1
			')) == 0) {
				Db::getInstance()->ExecuteS('
					INSERT INTO `'._DB_PREFIX_.'hook`
					VALUES (DEFAULT, "'.$k.'", "'.$v[0].'", "'.$v[1].'", 0, 0)
				');
			}
		}

		if (!parent::install() ||
			!$this->registerHook('similarProduct')) {
			$this->uninstall();
			return false;
		}
		return true;
	}

	public function uninstall()
	{
		// Remove custom hooks
		foreach($this->hooks as $k => $v) {
			Db::getInstance()->Execute('
				DELETE FROM `'._DB_PREFIX_.'hook`
				WHERE `name` = "'.$k.'"
			');
		}
		parent::uninstall();
	}

	public function hookSimilarProduct($params)
	{
		if(_PS_MOBILE_) {
			return false;
		}

		$result = $this->displayAccessories($params);
		if ($result=='') {
			return $this->displayBestVPSalesSameFamily($params);
		}
		return $result;
	}


	private function displayAccessories($params)
	{
		global $smarty;

		$cache_params = [
			'prefix_cache' => '1_'.$params['product']->id
			];

		if (!$this->isTemplateCached($cache_params)) {
				$currency = new Currency((int)($params['cookie']->id_currency));

				// get all accessories of this product
				$other_products = array();

				$accessories = $params['product']->getAccessories($params['cookie']->id_lang);
				if(is_array($accessories)) {
					foreach ($accessories AS $accessory)
					{
						$accessory['price'] = Tools::displayPrice(Product::getPriceStatic((int)($accessory['id_product'])), $currency);
						$other_products[] = $accessory;
					}
				}

				if (empty($other_products)) {
					return '';
				}

				$smarty->assign(
					array(
						'is_accessories' => TRUE,
						'ps_other_products' => $other_products,
					)
				);
		}

		return $this->flushTemplateCache($cache_params);
	}


	private function displayBestVPSalesSameFamily($params)
	{
		global $smarty;

		$cache_params = [
			'prefix_cache' => '2_'.$params['sale']->id,
			];

		if (!$this->isTemplateCached($cache_params)) {
				$currency = new Currency((int)($params['cookie']->id_currency));

				// get all best sales of the product family
				$other_products = array();

				$bestsellers = ProductSale::getBestSalesInFamilyOf(
					$params['sale']->id,
					(int)($params['cookie']->id_lang), 0, 3, NULL, NULL, 10
					);

				if(is_array($bestsellers)) {
					foreach ($bestsellers AS $bestseller) {
						$bestseller['price'] = Tools::displayPrice(Product::getPriceStatic((int)($bestseller['id_product'])), $currency);
						$other_products[] = $bestseller;
					}
				}

				if (empty($other_products)) {
					return '';
				}

				$smarty->assign(
					array(
						'is_accessories' => FALSE,
						'ps_other_products' => $other_products,
					)
				);
		}

		return $this->flushTemplateCache($cache_params);
		
	}

	private function isTemplateCached(&$cache_params)
	{
		global $smarty;
		global $cookie;

		Tools::enableCache();
	 	$smarty->cache_lifetime = 3600;

	 	$cache_params['compile_id'] = $cache_params['prefix_cache'].'_'.(int)$cookie->id_lang;
	 	$cache_params['cache_id'] = $cache_params['compile_id'].'_front_similarproducts';

	 	return $this->isCached(
	 		'front_similarproducts.tpl', 
	 		$cache_params['cache_id'], 
	 		$cache_params['compile_id']
	 		);
	}

	private function flushTemplateCache($cache_params)
	{
		global $smarty;

		$display = $this->display(
			__FILE__, 
			'front_similarproducts.tpl' , 
			$cache_params['cache_id'], 
			$cache_params['compile_id']
			);
		Tools::restoreCacheSettings();
		$smarty->cache_lifetime = -1;
		return $display;		
	}
}