first commit

modules/ps_currencyselector/config.xml

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+<?xml version="1.0" encoding="UTF-8" ?>
+<module>
+    <name>ps_currencyselector</name>
+    <displayName><![CDATA[Currency selector]]></displayName>
+    <version><![CDATA[2.0.1]]></version>
+    <description><![CDATA[Adds a block allowing customers to choose their preferred shopping currency.]]></description>
+    <author><![CDATA[PrestaShop]]></author>
+    <is_configurable>0</is_configurable>
+    <need_instance>0</need_instance>
+	<limited_countries></limited_countries>
+</module>

modules/ps_currencyselector/config_pl.xml

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+<?xml version="1.0" encoding="UTF-8" ?>
+<module>
+    <name>ps_currencyselector</name>
+    <displayName><![CDATA[Blok walut]]></displayName>
+    <version><![CDATA[2.0.1]]></version>
+    <description><![CDATA[Dodaj blok wyboru waluty]]></description>
+    <author><![CDATA[PrestaShop]]></author>
+    <tab><![CDATA[]]></tab>
+    <is_configurable>0</is_configurable>
+    <need_instance>0</need_instance>
+	<limited_countries></limited_countries>
+</module>

modules/ps_currencyselector/index.php

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+<?php
+/*
+* 2007-2015 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  2007-2015 PrestaShop SA
+*  @license    http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
+*  International Registered Trademark & Property of PrestaShop SA
+*/
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;

modules/ps_currencyselector/ps_currencyselector.php

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+<?php
+/*
+* 2007-2015 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  2007-2015 PrestaShop SA
+*  @license    http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
+*  International Registered Trademark & Property of PrestaShop SA
+*/
+
+use PrestaShop\PrestaShop\Adapter\ObjectPresenter;
+use PrestaShop\PrestaShop\Core\Module\WidgetInterface;
+
+if (!defined('_PS_VERSION_')) {
+    exit;
+}
+
+class Ps_Currencyselector extends Module implements WidgetInterface
+{
+    private $templateFile;
+
+    public function __construct()
+    {
+        $this->name = 'ps_currencyselector';
+        $this->author = 'PrestaShop';
+        $this->version = '2.0.1';
+        $this->need_instance = 0;
+
+        parent::__construct();
+
+        $this->displayName = $this->trans('Currency block', [], 'Modules.Currencyselector.Admin');
+        $this->description = $this->trans('Adds a block allowing customers to choose their preferred shopping currency.', [], 'Modules.Currencyselector.Admin');
+
+        $this->ps_versions_compliancy = ['min' => '1.7.1.0', 'max' => _PS_VERSION_];
+
+        $this->templateFile = 'module:ps_currencyselector/ps_currencyselector.tpl';
+    }
+
+    public function install()
+    {
+        return parent::install()
+            && $this->registerHook('actionAdminCurrenciesControllerSaveAfter');
+    }
+
+    public function hookActionAdminCurrenciesControllerSaveAfter($params)
+    {
+        return parent::_clearCache($this->templateFile);
+    }
+
+    public function getWidgetVariables($hookName, array $configuration)
+    {
+        $current_currency = null;
+        $serializer = new ObjectPresenter();
+        $currencies = array_map(
+            function ($currency) use ($serializer, &$current_currency) {
+                $currencyArray = $serializer->present($currency);
+
+                // serializer doesn't see 'sign' because it is not a regular
+                // ObjectModel field.
+                $currencyArray['sign'] = $currency->sign;
+
+                $url = $this->context->link->getLanguageLink($this->context->language->id);
+
+                $parsedUrl = parse_url($url);
+                $urlParams = [];
+                if (isset($parsedUrl['query'])) {
+                    parse_str($parsedUrl['query'], $urlParams);
+                }
+                $newParams = array_merge(
+                    $urlParams,
+                    [
+                        'SubmitCurrency' => 1,
+                        'id_currency' => $currency->id,
+                    ]
+                );
+                $newUrl = sprintf('%s://%s%s%s?%s',
+                    $parsedUrl['scheme'],
+                    $parsedUrl['host'],
+                    isset($parsedUrl['port']) ? ':' . $parsedUrl['port'] : '',
+                    $parsedUrl['path'],
+                    http_build_query($newParams)
+                );
+
+                $currencyArray['url'] = $newUrl;
+
+                if ($currency->id === $this->context->currency->id) {
+                    $currencyArray['current'] = true;
+                    $current_currency = $currencyArray;
+                } else {
+                    $currencyArray['current'] = false;
+                }
+
+                return $currencyArray;
+            },
+            Currency::getCurrencies(true, true)
+        );
+
+        return [
+            'currencies' => $currencies,
+            'current_currency' => $current_currency,
+        ];
+    }
+
+    public function renderWidget($hookName, array $configuration)
+    {
+        if (Configuration::isCatalogMode() || !Currency::isMultiCurrencyActivated()) {
+            return false;
+        }
+
+        $this->smarty->assign($this->getWidgetVariables($hookName, $configuration));
+
+        return $this->fetch($this->templateFile);
+    }
+}

modules/ps_currencyselector/ps_currencyselector.tpl

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+{*
+* 2007-2015 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  2007-2015 PrestaShop SA
+*  @license    http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
+*  International Registered Trademark & Property of PrestaShop SA
+*}
+
+<div class="currency-selector">
+  <span>{$current_currency.iso_code} {$current_currency.sign}</span>
+  <ul>
+    {foreach from=$currencies item=currency}
+      <li {if $currency.current} class="current" {/if}>
+        <a rel="nofollow" href="{$currency.url}">{$currency.iso_code} {$currency.sign}</a>
+      </li>
+    {/foreach}
+  </ul>
+</div>

modules/ps_currencyselector/translations/index.php

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+<?php
+/*
+* 2007-2015 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  2007-2015 PrestaShop SA
+*  @license    http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
+*  International Registered Trademark & Property of PrestaShop SA
+*/
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;