Add message callback response message handling

src/main/java/net/dv8tion/jda/api/interactions/InteractionHook.java

@@ -33,6 +33,7 @@
 
 import javax.annotation.CheckReturnValue;
 import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 import java.util.Arrays;
 import java.util.Collection;
 
@@ -72,6 +73,15 @@ public interface InteractionHook extends WebhookClient<Message>
     @Nonnull
     Interaction getInteraction();
 
+    /**
+     * The message created by interaction replies like {@link IReplyCallback#reply(String)}
+     * or interaction updates like {@link IMessageEditCallback#editMessage(String)}.
+     *
+     * @return {@link Message}, if available.
+     */
+    @Nullable
+    Message getCallbackResponseMessage();
+
     /**
      * The unix millisecond timestamp for the expiration of this interaction hook.
      * <br>An interaction hook expires after 15 minutes of its creation.

src/main/java/net/dv8tion/jda/internal/interactions/InteractionHookImpl.java

@@ -55,6 +55,7 @@ public class InteractionHookImpl extends AbstractWebhookClient<Message> implemen
     private Exception exception;
     private boolean isReady;
     private boolean ephemeral;
+    private Message callbackResponseMessage;
 
     public InteractionHookImpl(@Nonnull DeferrableInteractionImpl interaction, @Nonnull JDA api)
     {
@@ -126,6 +127,12 @@ else if (exception != null)
         });
     }
 
+    public InteractionHookImpl setCallbackResponseMessage(Message message)
+    {
+        this.callbackResponseMessage = message;
+        return this;
+    }
+
     @Nonnull
     @Override
     public InteractionImpl getInteraction()
@@ -135,6 +142,12 @@ public InteractionImpl getInteraction()
         return interaction;
     }
 
+    @Override
+    public Message getCallbackResponseMessage()
+    {
+        return callbackResponseMessage;
+    }
+
     @Override
     public long getExpirationTimestamp()
     {
@@ -210,7 +223,7 @@ private boolean checkExpired()
     // Sometimes we can't resolve the channel and report an unknown type
     // Currently known cases where channels can't be resolved:
     //  - InteractionHook created using id/token factory, has no interaction object to use as context
-    private Message buildMessage(DataObject json)
+    public Message buildMessage(DataObject json)
     {
         JDAImpl jda = (JDAImpl) api;
         MessageChannel channel = null;

src/main/java/net/dv8tion/jda/internal/requests/restaction/interactions/DeferrableCallbackActionImpl.java

@@ -19,7 +19,10 @@
 import net.dv8tion.jda.api.interactions.InteractionHook;
 import net.dv8tion.jda.api.requests.Request;
 import net.dv8tion.jda.api.requests.Response;
+import net.dv8tion.jda.api.utils.data.DataObject;
 import net.dv8tion.jda.internal.interactions.InteractionHookImpl;
+import okhttp3.MediaType;
+import okhttp3.ResponseBody;
 
 public abstract class DeferrableCallbackActionImpl extends InteractionCallbackImpl<InteractionHook>
 {
@@ -41,6 +44,32 @@ protected void handleSuccess(Response response, Request<InteractionHook> request
         // we also need to provide the hook itself to the success callback of the RestAction,
         // so we override this functionality
         interaction.releaseHook(true);
+        parseOptionalBody(response);
         request.onSuccess(hook);
     }
+
+    private void parseOptionalBody(Response response)
+    {
+        okhttp3.Response rawResponse = response.getRawResponse();
+        if (rawResponse == null)
+            return;
+
+        ResponseBody body = rawResponse.body();
+        if (body == null)
+            return;
+
+        MediaType mediaType = body.contentType();
+        if (mediaType != null && mediaType.toString().startsWith("application/json"))
+        {
+            response.optObject().ifPresent(json ->
+            {
+                DataObject resource = json.getObject("resource");
+                if (resource.getInt("type", -1) == 4)
+                {
+                    DataObject message = resource.getObject("message");
+                    hook.setCallbackResponseMessage(hook.buildMessage(message));
+                }
+            });
+        }
+    }
 }

src/main/java/net/dv8tion/jda/internal/requests/restaction/interactions/InteractionCallbackImpl.java

@@ -32,7 +32,9 @@ public abstract class InteractionCallbackImpl<T> extends RestActionImpl<T> imple
 
     public InteractionCallbackImpl(InteractionImpl interaction)
     {
-        super(interaction.getJDA(),  Route.Interactions.CALLBACK.compile(interaction.getId(), interaction.getToken()));
+        super(interaction.getJDA(),
+            Route.Interactions.CALLBACK.compile(interaction.getId(), interaction.getToken())
+                .withQueryParams("with_response", "true"));
         this.interaction = interaction;
         setErrorMapper(this::handleUnknownInteraction);
     }