添加twilio支持 (overtrue#72)

* 添加twilio gateway

* readme添加内容

* 添加常规错误检查

* 测试

* 移除不需要的引用

README.md

@@ -404,6 +404,19 @@ $easySms->send(13188888888, $message);
     ]
 ```
 
+### [twilio](https://www.twilio.com)
+
+短信使用 `content`  
+发送对象需要 使用`+`添加区号
+
+```php
+    'twilio' => [
+        'account_sid' => '', // sid
+        'from' => '', // 发送的号码 可以在控制台购买
+        'token' => '', // apitoken
+    ],
+```
+
 ## License
 
 MIT

src/Gateways/TwilioGateway.php

@@ -0,0 +1,69 @@
+<?php
+
+namespace Overtrue\EasySms\Gateways;
+
+use Overtrue\EasySms\Contracts\MessageInterface;
+use Overtrue\EasySms\Exceptions\GatewayErrorException;
+use Overtrue\EasySms\Support\Config;
+use Overtrue\EasySms\Traits\HasHttpRequest;
+use GuzzleHttp\Exception\ClientException;
+
+/**
+ * Class TwilioGateway
+ *  @see https://www.twilio.com/docs/api/messaging/send-messages
+ */
+class TwilioGateway extends Gateway
+{
+    use HasHttpRequest;
+
+    const ENDPOINT_URL = 'https://api.twilio.com/2010-04-01/Accounts/%s/Messages.json';
+
+    protected $errorStatuses = [
+        'failed',
+        'undelivered'
+    ];
+
+    public function getName()
+    {
+        return 'twilio';
+    }
+
+    public function send($to, MessageInterface $message, Config $config)
+    {
+        $accountSid = $config->get('account_sid');
+        $endpoint = $this->buildEndPoint($accountSid);
+
+        $params = [
+            'To' => $to,
+            'From' => $config->get('from'),
+            'Body' => $message->getContent(),
+        ];
+
+        try {
+            $result = $this->request('post', $endpoint, [
+                'auth' => [
+                    $accountSid,
+                    $config->get('token')
+                ],
+                'form_params' => $params
+            ]);
+            if (in_array($result['status'], $this->errorStatuses) || !is_null($result['error_code'])) {
+                throw new GatewayErrorException($result['message'], $result['error_code'], $result);
+            }
+        } catch (ClientException $e) {
+            throw new GatewayErrorException($e->getMessage(), $e->getCode());
+        }
+        return $result;
+    }
+
+    /**
+     * build endpoint url
+     *
+     * @param string $accountSid
+     * @return string
+     */
+    protected function buildEndPoint($accountSid)
+    {
+        return sprintf(self::ENDPOINT_URL, $accountSid);
+    }
+}

tests/Gateways/TwilioGatewayTest.php

@@ -0,0 +1,56 @@
+<?php
+
+/*
+ * This file is part of the overtrue/easy-sms.
+ *
+ * (c) overtrue <[email protected]>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace Overtrue\EasySms\Tests\Gateways;
+
+use Overtrue\EasySms\Gateways\TwilioGateway;
+use Overtrue\EasySms\Message;
+use Overtrue\EasySms\Support\Config;
+use Overtrue\EasySms\Tests\TestCase;
+
+class TwilioGatewayTest extends TestCase
+{
+    public function testGetName()
+    {
+        $this->assertSame('twilio', (new TwilioGateway([]))->getName());
+    }
+
+    public function testSend()
+    {
+        $config = [
+            'account_sid' => 'mock-api-account-sid',
+            'from' => 'mock-from',
+            'token' => 'mock-token',
+        ];
+        $gateway = \Mockery::mock(TwilioGateway::class.'[request]', [$config])->shouldAllowMockingProtectedMethods();
+
+        $gateway->shouldReceive('request')->andReturn([
+            'status' => 'queued',
+            'from' => 'mock-from',
+            'to' => '+8618888888888',
+            'body' => '【twilio】This is a test message.',
+            'sid' => 'mock-api-account-sid',
+            'error_code' => null,
+        ]);
+
+        $message = new Message(['content' => '【twilio】This is a test message.']);
+        $config = new Config($config);
+
+        $this->assertSame([
+            'status' => 'queued',
+            'from' => 'mock-from',
+            'to' => '+8618888888888',
+            'body' => '【twilio】This is a test message.',
+            'sid' => 'mock-api-account-sid',
+            'error_code' => null,
+        ], $gateway->send('+8618888888888', $message, $config));
+    }
+}