Magento Braintree支付对接（四）创建支付模块

前面，我们已经在服务器部署好braintree的组件和创建了braintree的沙箱环境，下面我们进入正式的开发

创建模块

1. 创建对应的模块文件目录和文件

app\etc\modules\Braintree_PaymentMethod.xml
app\code\local\Braintree\PaymentMethod\Block\Payment\Braintree.php
app\code\local\Braintree\PaymentMethod\controllers\ApiController.php
app\code\local\Braintree\PaymentMethod\etc\config.xml
app\code\local\Braintree\PaymentMethod\etc\system.xml
app\code\local\Braintree\PaymentMethod\Helper\Data.php
app\code\local\Braintree\PaymentMethod\Model\Creditcard.php
app\code\local\Braintree\PaymentMethod\Model\Source\Environment.php

2. 配置模块的基础信息，在app\etc\modules\Braintree_PaymentMethod.xml

<?xml version="1.0"?>
<config>
    <modules>
        <Braintree_PaymentMethod>
            <active>true</active>
            <codePool>local</codePool>

            <depends>
                <Mage_Payment/>
            </depends>
        </Braintree_PaymentMethod>
    </modules>
</config>

上面配置了模块的开关和模块的位置在local文件目录下

3. 配置braintree的模块的信息，在app\code\local\Braintree\PaymentMethod\etc\config.xml

<?xml version="1.0"?>
<config>
    <modules>
        <Braintree_PaymentMethod>
            <version>0.1.0</version>
        </Braintree_PaymentMethod>
    </modules>
    <global>
        <blocks>
            <braintree_paymentmethod>
                <class>Braintree_PaymentMethod_Block</class>
            </braintree_paymentmethod>
        </blocks>
        <models>
            <braintree_paymentmethod>
                <class>Braintree_PaymentMethod_Model</class>
            </braintree_paymentmethod>
        </models>
        <helpers>
            <braintree_paymentmethod>
                <class>Braintree_PaymentMethod_Helper</class>
            </braintree_paymentmethod>
        </helpers>
    </global>
    <frontend>
        <routers>
            <braintree_paymentmethod>
                <use>standard</use>
                <args>
                    <module>Braintree_PaymentMethod</module>
                    <frontName>braintree_pay</frontName>
                </args>
            </braintree_paymentmethod>
        </routers>
    </frontend>
	    <default>
        <payment>
            <braintree_creditcard>
                <model>braintree_paymentmethod/creditcard</model>
                <active>1</active>
                <order_status>pending</order_status>
                <title>Braintree Credit Card</title>
                <environment>Y</environment>
                <payment_action>sale</payment_action>
                <sort_order>100</sort_order>
            </braintree_creditcard>
        </payment>
    </default>
</config>

4. 在model中，配置环境和API凭据，在app\code\local\Braintree\PaymentMethod\Model\Creditcard.php

<?php
use Braintree\Gateway;
class Braintree_PaymentMethod_Model_Creditcard extends Mage_Payment_Model_Method_Abstract
{
    // This is the identifier of our payment method
    protected $_code = 'braintree_creditcard';
    protected $_isInitializeNeeded      = true;
    protected $_canUseCheckout          = true; //是否在前端checkout页显示
    protected $_canUseInternal          = false;
    protected $_canUseForMultishipping  = false;

    /**
     * API凭证
     * environment 该环境指定应将通过API的请求定向到哪里-沙箱或生产
     * merchantId 商家ID是整个网关帐户（包括网关中可能存在的多个商家帐户）的唯一标识符
     * publicKey 用户特定的公共标识符
     * privateKey 用户的专用标识符
     * link https://articles.braintreepayments.com/control-panel/important-gateway-credentials?_ga=1.78189399.251773956.1611709303#api-credentials
     */
    public function getGateway()
    {
        $gateway = new Gateway([
    'environment' => 'sandbox',
    'merchantId' => 'use_your_merchant_id',
    'publicKey' => 'use_your_public_key',
    'privateKey' => 'use_your_private_key'
        ]);
        return $gateway;
    }

    /**
     * 生成客户令牌
     * 令牌包含客户端初始化客户端SDK与Braintree进行通信所需的所有授权和配置信息
    * https://developers.braintreepayments.com/reference/request/client-token/generate/php
    */
    public function getClientToken()
    {
        $clientToken = $this->getGateway()->clientToken()->generate();
        return $clientToken;
    }

我们开始测试一下，看magento能否和braintree进行通讯了，在app\code\local\Braintree\PaymentMethod\controllers\ApiController.php

<?php
class Braintree_PaymentMethod_ApiController extends Mage_Core_Controller_Front_Action
{
    public function testAction(){
      $result = Mage::getModel('braintree_paymentmethod/creditcard')->getClientToken();
      var_dump($result);
    }
}

在页面上打开链接查看一下，控制器能否打印出token

http://你的域名/braintree_pay/api/test

能正常输出token，说明magento与braintree通讯成功，下一步就是尝试展示付款页面

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