Init source MVP

Api/StripeInterface.php

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+<?php
+
+/**
+ * Copyright © 2018 Magestore. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magestore\WebposStripe\Api;
+
+/**
+ * Interface StripeInterface
+ * @package Magestore\WebposStripe\Api
+ */
+interface StripeInterface
+{
+    /**
+     * @return bool
+     */
+    public function validateRequiredSDK();
+
+    /**
+     * @param string $key
+     * @return anyType
+     */
+    public function getConfig($key = '');
+}

Api/StripeServiceInterface.php

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+<?php
+
+/**
+ * Copyright © 2018 Magestore. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magestore\WebposStripe\Api;
+
+/**
+ * Interface StripeServiceInterface
+ * @package Magestore\WebposStripe\Api
+ */
+interface StripeServiceInterface
+{
+    /**
+     * @return bool
+     */
+    public function isEnable();
+
+    /**
+     * @return string
+     */
+    public function getConfigurationError();
+
+    /**
+     * @return bool
+     */
+    public function canConnectToApi();
+
+    /**
+     * @param string $token
+     * @param string $amount
+     * @return string
+     */
+    public function finishPayment($token, $amount);
+
+}

Block/Adminhtml/Config/Instruction.php

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+<?php
+
+/**
+ * Copyright © 2018 Magestore. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+namespace Magestore\WebposStripe\Block\Adminhtml\Config;
+
+
+class Instruction extends \Magento\Config\Block\System\Config\Form\Fieldset
+{
+    /**
+     * {@inheritdoc}
+     */
+    protected function _prepareLayout()
+    {
+        $this->addChild('stripe_setup_guide', 'Magestore\WebposStripe\Block\Adminhtml\Config\Setupguide');
+
+        return parent::_prepareLayout();
+    }
+
+    /**
+     * @param \Magento\Framework\Data\Form\Element\AbstractElement $element
+     *
+     * @return string
+     */
+    public function render(\Magento\Framework\Data\Form\Element\AbstractElement $element)
+    {
+        return $this->getChildHtml('stripe_setup_guide');
+    }
+}

Block/Adminhtml/Config/Setupguide.php

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+<?php
+
+/**
+ * Copyright © 2018 Magestore. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+namespace Magestore\WebposStripe\Block\Adminhtml\Config;
+
+
+class Setupguide extends \Magento\Backend\Block\Template
+{
+    /**
+     * @var string
+     */
+    protected $_template = 'Magestore_WebposStripe::config/setupguide.phtml';
+
+    /**
+     * Get api test url
+     * @return string
+     */
+    public function getTestApiUrl(){
+        return $this->getUrl('webposstripe/api/test');
+    }
+
+}

COPYING.txt

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+ * Magestore.com
+ *
+ * NOTICE OF LICENSE
+ * This source package is subject to the Magestore.com license that is available through the world-wide-web at this URL: http://www.magestore.com/license-agreement.html
+ * Please see LICENSE.txt
+ *
+ * DISCLAIMER
+ * Do not edit or add to any file of this package if you wish to upgrade this extension to newer version in the future.

Controller/Adminhtml/AbstractAction.php

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+<?php
+/**
+ * Copyright © 2018 Magestore. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magestore\WebposStripe\Controller\Adminhtml;
+
+/**
+ * Class AbstractAction
+ * @package Magestore\WebposStripe\Controller\Adminhtml
+ */
+abstract class AbstractAction extends \Magento\Backend\App\Action
+{
+    /**
+     * @var \Magestore\WebposStripe\Api\StripeServiceInterface
+     */
+    protected $stripeService;
+
+    /**
+     * @var \Magento\Framework\Controller\ResultFactory
+     */
+    protected $resultFactory;
+
+    /**
+     * @var \Magestore\WebposStripe\Helper\Data
+     */
+    protected $helper;
+
+    /**
+     * AbstractAction constructor.
+     * @param \Magento\Backend\App\Action\Context $context
+     * @param \Magestore\WebposStripe\Api\StripeServiceInterface $stripeService
+     * @param \Magestore\WebposStripe\Helper\Data $helper
+     */
+    public function __construct(
+        \Magento\Backend\App\Action\Context $context,
+        \Magestore\WebposStripe\Api\StripeServiceInterface $stripeService,
+        \Magestore\WebposStripe\Helper\Data $helper
+    ){
+        parent::__construct($context);
+        $this->stripeService = $stripeService;
+        $this->helper = $helper;
+        $this->resultFactory = $context->getResultFactory();
+    }
+
+    /**
+     * @param $data
+     * @return mixed
+     */
+    public function createJsonResult($data){
+        $resultJson = $this->resultFactory->create(\Magento\Framework\Controller\ResultFactory::TYPE_JSON);
+        return $resultJson->setData($data);
+    }
+}

Controller/Adminhtml/Api/Test.php

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+<?php
+/**
+ * Copyright © 2018 Magestore. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magestore\WebposStripe\Controller\Adminhtml\Api;
+
+/**
+ * Class Test
+ * @package Magestore\WebposStripe\Controller\Adminhtml\Api
+ */
+class Test extends \Magestore\WebposStripe\Controller\Adminhtml\AbstractAction
+{
+    /**
+     * @return \Magento\Framework\Controller\Result\Json $resultJson
+     */
+    public function execute()
+    {
+        $response = [
+            'url' => '',
+            'message' => '',
+            'success' => true
+        ];
+        $isEnable = $this->stripeService->isEnable();
+        if ($isEnable) {
+            $connected = $this->stripeService->canConnectToApi();
+            $response['success'] = ($connected) ? true : false;
+            $response['message'] = ($connected) ? '' : __('Connection failed. Please contact admin to check the configuration of API.');
+        } else {
+            $message = $this->stripeService->getConfigurationError();
+            $response['success'] = false;
+            $response['message'] = __($message);
+        }
+        return $this->createJsonResult($response);
+    }
+}

Helper/Data.php

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+<?php
+
+/**
+ * Copyright © 2018 Magestore. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+namespace Magestore\WebposStripe\Helper;
+
+/**
+ * Class Data
+ * @package Magestore\WebposStripe\Helper
+ */
+class Data extends \Magento\Framework\App\Helper\AbstractHelper
+{
+    /**
+     *
+     * @var \Magento\Store\Model\StoreManagerInterface
+     */
+    protected $_storeManager;
+
+    /**
+     *
+     * @var \Magento\Framework\App\ObjectManager
+     */
+    protected $_objectManager;
+
+    /**
+     * Data constructor.
+     * @param \Magento\Framework\App\Helper\Context $context
+     * @param \Magento\Store\Model\StoreManagerInterface $storeManager
+     */
+    public function __construct(
+        \Magento\Framework\App\Helper\Context $context,
+        \Magento\Store\Model\StoreManagerInterface $storeManager
+    ){
+        $this->_storeManager = $storeManager;
+        $this->_objectManager = \Magento\Framework\App\ObjectManager::getInstance();
+        parent::__construct($context);
+    }
+
+    /**
+     * get store
+     *
+     * @return \Magento\Store\Api\Data\StoreInterface
+     */
+    public function getStore(){
+        return $this->_storeManager->getStore();
+    }
+
+    /**
+     * get store config
+     *
+     * @param string $path
+     * @return string
+     */
+    public function getStoreConfig($path){
+        return $this->scopeConfig->getValue($path, \Magento\Store\Model\ScopeInterface::SCOPE_STORE);
+    }
+
+    /**
+     * @return array
+     */
+    public function getStripeConfig() {
+        $configData = array();
+        $configItems = array(
+            'enable',
+            'sort_order',
+            'publishable_key',
+            'api_key'
+        );
+        foreach ($configItems as $configItem) {
+            $configData[$configItem] = $this->getStoreConfig('webpos/payment/stripe/' . $configItem);
+        }
+        return $configData;
+    }
+
+    /**
+     * @return bool
+     */
+    public function isEnableStripe(){
+        $enable = $this->getStoreConfig('webpos/payment/stripe/enable');
+        return ($enable == 1)?true:false;
+    }
+
+    /**
+     * @param $currency
+     * @return bool
+     */
+    public function isZeroDecimal($currency)
+    {
+        return in_array(strtolower($currency), array(
+            'bif', 'djf', 'jpy', 'krw', 'pyg', 'vnd', 'xaf',
+            'xpf', 'clp', 'gnf', 'kmf', 'mga', 'rwf', 'vuv', 'xof'));
+    }
+
+}