Add WhatsApp Sandbox support to Conversations API

README.md

@@ -46,6 +46,18 @@ $Balance = $MessageBird->balance->read();
 ```
 
 
+Conversations Whatsapp Sandbox
+-------------
+
+To use the whatsapp sandbox you need to add `\MessageBird\Client::ENABLE_CONVERSATIONSAPI_WHATSAPP_SANDBOX` to the list of features you want enabled. Don't forget to replace `YOUR_ACCESS_KEY` with your actual access key.
+
+```php
+$messageBird = new \MessageBird\Client('YOUR_ACCESS_KEY', null, [\MessageBird\Client::ENABLE_CONVERSATIONSAPI_WHATSAPP_SANDBOX]);
+```
+
+If you use a custom `HttpClient` you will have to manually direct Conversation API request to the WhatsApp sandbox endpoint.
+
+
 Documentation
 ----
 Complete documentation, instructions, and examples are available at:

examples/conversations/enable-whatsapp-sandbox.php

@@ -0,0 +1,30 @@
+<?php
+
+// Initiates a conversation by sending a first message. This example uses a
+// plain text message, but other types are also available. See the
+// conversations-messages-create examples.
+
+require(__DIR__ . '/../../autoload.php');
+
+// Set your own API access key here.
+// Create a client with WhatsApp sandbox enabled.
+$messageBird = new \MessageBird\Client('YOUR_ACCESS_KEY', null, [\MessageBird\Client::ENABLE_CONVERSATIONSAPI_WHATSAPP_SANDBOX]);
+
+// Use WhatsApp sandbox channel as normal. 
+
+$content = new \MessageBird\Objects\Conversation\Content();
+$content->text = 'Hello world';
+
+$message = new \MessageBird\Objects\Conversation\Message();
+$message->channelId = 'WHATSAPP_SANDBOX_CHANNEL_ID';
+$message->content = $content;
+$message->to = 'RECIPIENT'; // Channel-specific, e.g. MSISDN for SMS.
+$message->type = 'text';
+
+try {
+    $conversation = $messageBird->conversations->start($message);
+
+    var_dump($conversation);
+} catch (\Exception $e) {
+    echo sprintf("%s: %s", get_class($e), $e->getMessage());
+}

src/MessageBird/Client.php

@@ -14,6 +14,9 @@ class Client
     const CONVERSATIONSAPI_ENDPOINT = 'https://conversations.messagebird.com/v1';
     const VOICEAPI_ENDPOINT = 'https://voice.messagebird.com';
 
+    const ENABLE_CONVERSATIONSAPI_WHATSAPP_SANDBOX = 'ENABLE_CONVERSATIONSAPI_WHATSAPP_SANDBOX';
+    const CONVERSATIONSAPI_WHATSAPP_SANDBOX_ENDPOINT = 'https://whatsapp-sandbox.messagebird.com/v1';
+
     const CLIENT_VERSION = '1.15.0';
 
     /**
@@ -160,11 +163,11 @@ class Client
      * @param string            $accessKey
      * @param Common\HttpClient $httpClient
      */
-    public function __construct($accessKey = null, Common\HttpClient $httpClient = null)
+    public function __construct($accessKey = null, Common\HttpClient $httpClient = null, array $config = [])
     {
         if ($httpClient === null) {
             $this->ChatAPIHttpClient = new Common\HttpClient(self::CHATAPI_ENDPOINT);
-            $this->ConversationsAPIHttpClient = new Common\HttpClient(self::CONVERSATIONSAPI_ENDPOINT);
+            $this->ConversationsAPIHttpClient = new Common\HttpClient(in_array(self::ENABLE_CONVERSATIONSAPI_WHATSAPP_SANDBOX, $config) ? self::CONVERSATIONSAPI_WHATSAPP_SANDBOX_ENDPOINT : self::CONVERSATIONSAPI_ENDPOINT);
             $this->HttpClient = new Common\HttpClient(self::ENDPOINT);
             $this->VoiceAPIHttpClient = new Common\HttpClient(self::VOICEAPI_ENDPOINT, 10, 2, array(
                 'X-MessageBird-Version' => '20170314',