Add WhatsApp Sandbox support to Conversations API

README.md

@@ -115,6 +115,16 @@ If you server doesn't have a direct connection to the internet you can setup a p
     messageBirdService.setProxy(proxy);
 ```
 
+##### Conversations WhatsApp Sandbox
+To use the whatsapp sandbox you need to add `MessageBirdClient.ENABLE_CONVERSATION_API_WHATSAPP_SANDBOX` to the list of features you want enabled. Don't forget to replace `YOUR_ACCESS_KEY` with your actual access key.
+
+```java
+    // Create a MessageBirdService
+    final MessageBirdService messageBirdService = new MessageBirdServiceImpl("YOUR_ACCESS_KEY");
+    // Add the service to the client
+    final MessageBirdClient messageBirdClient = new MessageBirdClient(messageBirdService, new MessageBirdClient.Feature[]{MessageBirdClient.Feature.ENABLE_CONVERSATION_API_WHATSAPP_SANDBOX});
+```
+
 Documentation
 -------------
 Complete documentation, instructions, and examples are available at:

api/src/main/java/com/messagebird/MessageBirdClient.java

@@ -43,7 +43,9 @@ public class MessageBirdClient {
      * can, however, override this behaviour by providing absolute URLs
      * ourselves.
      */
-    private static final String CONVERSATIONS_BASE_URL = "https://conversations.messagebird.com/v1";
+    private String CONVERSATIONS_BASE_URL  = "https://conversations.messagebird.com/v1";
+    private static final String CONVERSATIONS_WHATSAPP_SANDBOX_BASE_URL ="https://whatsapp-sandbox.messagebird.com/v1";
+
     static final String VOICE_CALLS_BASE_URL = "https://voice.messagebird.com";
     private static String[] supportedLanguages = {"de-DE", "en-AU", "en-UK", "en-US", "es-ES", "es-LA", "fr-FR", "it-IT", "nl-NL", "pt-BR"};
 
@@ -68,10 +70,21 @@ public class MessageBirdClient {
 
     private MessageBirdService messageBirdService;
 
+
+    public enum Feature {
+        ENABLE_CONVERSATION_API_WHATSAPP_SANDBOX
+    }
+
     public MessageBirdClient(final MessageBirdService messageBirdService) {
         this.messageBirdService = messageBirdService;
     }
 
+    public MessageBirdClient(final MessageBirdService messageBirdService, Feature[] features) {
+        this.messageBirdService = messageBirdService;
+        if(Arrays.asList(features).contains(Feature.ENABLE_CONVERSATION_API_WHATSAPP_SANDBOX)) {
+            this.CONVERSATIONS_BASE_URL = CONVERSATIONS_WHATSAPP_SANDBOX_BASE_URL;
+        }
+    }
     /****************************************************************************************************/
     /** Balance and HRL methods                                                                        **/
     /****************************************************************************************************/