Add currency helper (#10)

* Add currency helper

* Cleanup currency helper

Helper/Currency.php

@@ -0,0 +1,94 @@
+<?php
+/**
+ * @author Mygento
+ * @copyright See COPYING.txt for license details.
+ * @package Mygento_Base
+ */
+
+namespace Mygento\Base\Helper;
+
+use Magento\Directory\Model\CurrencyFactory;
+use Magento\Framework\App\Helper\AbstractHelper;
+use Magento\Framework\App\Helper\Context;
+use Magento\Store\Model\StoreManagerInterface;
+
+/**
+ * Base Data helper
+ */
+class Currency extends AbstractHelper
+{
+    /**
+     * @var StoreManagerInterface
+     */
+    private $storeManager;
+
+    /**
+     * @var CurrencyFactory
+     */
+    private $currencyFactory;
+
+    /**
+     * Currency constructor.
+     * @param Context $context
+     * @param StoreManagerInterface $storeManager
+     * @param CurrencyFactory $currencyFactory
+     */
+    public function __construct(
+        Context $context,
+        StoreManagerInterface $storeManager,
+        CurrencyFactory $currencyFactory
+    ) {
+        parent::__construct($context);
+        $this->storeManager = $storeManager;
+        $this->currencyFactory = $currencyFactory;
+    }
+
+    /**
+     * @param $amountValue
+     * @param null $currencyCodeFrom
+     * @param null $currencyCodeTo
+     * @return float|int
+     * @throws \Magento\Framework\Exception\NoSuchEntityException
+     */
+    public function convert($amountValue, $currencyCodeFrom = null, $currencyCodeTo = null)
+    {
+        /**
+         * If is not specified the currency code from which we want to convert
+         * - use current currency
+         */
+        if (!$currencyCodeFrom) {
+            $currencyCodeFrom = $this->storeManager->getStore()
+                ->getCurrentCurrency()->getCode();
+        }
+
+        /**
+         * If is not specified the currency code to which we want to convert
+         * - use base currency
+         */
+        if (!$currencyCodeTo) {
+            $currencyCodeTo = $this->storeManager->getStore()
+                ->getBaseCurrency()->getCode();
+        }
+
+        /**
+         * Do not convert if currency is same
+         */
+        if ($currencyCodeFrom == $currencyCodeTo) {
+            return $amountValue;
+        }
+
+        /** @var float $rate */
+        // Get rate
+        $rate = $this->currencyFactory->create()
+            ->load($currencyCodeFrom)->getAnyRate($currencyCodeTo);
+
+        if (!$rate) {
+            throw new \Exception(__('Cannot find currency rate'));
+        }
+
+        // Get amount in new currency
+        $amountValue = $amountValue * $rate;
+
+        return $amountValue;
+    }
+}

composer.json

@@ -1,7 +1,7 @@
 {
   "name": "mygento/base",
   "type": "magento2-module",
-  "version": "2.2.11",
+  "version": "2.2.12",
   "license": "OSL-3.0",
   "homepage": "https://github.com/mygento/base",
   "description": "Mygento Base",

etc/module.xml

@@ -7,5 +7,5 @@
  */
 -->
 <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
-    <module name="Mygento_Base" setup_version="2.2.11"></module>
+    <module name="Mygento_Base" setup_version="2.2.12"></module>
 </config>