Prestashop blockcurrencies.php

<?php
/*
* 2007-2013 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  2007-2013 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 BlockCurrencies extends Module
{
    public function __construct()
    {
        $this->name = 'blockcurrencies';
        $this->tab = 'front_office_features';
        $this->version = 0.1;
        $this->author = 'PrestaShop';
        $this->need_instance = 0;

        parent::__construct();

        $this->displayName = $this->l('Currency block');
        $this->description = $this->l('Adds a block allowing customers to choose their preferred shopping currency.');
    }

    public function install()
    {
        return parent::install() && $this->registerHook('top') && $this->registerHook('header');
    }

    private function _prepareHook($params)
    {
        if (Configuration::get('PS_CATALOG_MODE'))
            return false;

        if (!count(Currency::getCurrencies()))
            return false;

        $this->smarty->assign('blockcurrencies_sign', $this->context->currency->sign);

        return true;
    }

    /**
    * Returns module content for header
    *
    * @param array $params Parameters
    * @return string Content
    */
    public function hookTop($params)
    {
        if ($this->_prepareHook($params))
            return $this->display(__FILE__, 'blockcurrencies.tpl');
    }

    public function hookHeader($params)
    {
        if (Configuration::get('PS_CATALOG_MODE'))
            return;
        $this->context->controller->addCSS(($this->_path).'blockcurrencies.css', 'all');
    }
}