feat: Introduce CreateMessage command

config/backend-routes/messaging/messaging.php

@@ -36,6 +36,7 @@
             'messages' => RouteConfig::getRouteConfig(
                 'messages',
                 [
+                    'POST' => CommandConfig::getPostConfig(Command\Messaging\Message\Create::class),
                     'by-conversation' => RouteConfig::getRouteConfig(
                         'by-conversation',
                         [

src/Command/Messaging/Message/Create.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Dvsa\Olcs\Transfer\Command\Messaging\Message;
+
+use Dvsa\Olcs\Transfer\Command\AbstractCommand;
+use Dvsa\Olcs\Transfer\FieldType\Traits\Messaging\Conversation;
+use Dvsa\Olcs\Transfer\FieldType\Traits\Messaging\MessageContent;
+use Dvsa\Olcs\Transfer\Util\Annotation as Transfer;
+
+/**
+ * @Transfer\RouteName("backend/messaging/messages")
+ * @Transfer\Method("POST")
+ */
+final class Create extends AbstractCommand
+{
+    use Conversation;
+    use MessageContent;
+}

src/FieldType/Traits/Conversation.php → src/FieldType/Traits/Messaging/Conversation.php

@@ -1,6 +1,6 @@
 <?php
 
-namespace Dvsa\Olcs\Transfer\FieldType\Traits;
+namespace Dvsa\Olcs\Transfer\FieldType\Traits\Messaging;
 
 /**
  * Trait Conversation

src/FieldType/Traits/Messaging/MessageContent.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Dvsa\Olcs\Transfer\FieldType\Traits\Messaging;
+
+/**
+ * Trait Conversation
+ *
+ * @package Dvsa\Olcs\Transfer\FieldType\Traits
+ */
+trait MessageContent
+{
+    /**
+     * @Transfer\Filter("Laminas\Filter\StringTrim")
+     * @Transfer\Validator("Laminas\Validator\StringLength", options={"max":3000})
+     */
+    protected $messageContent;
+
+    public function getMessageContent()
+    {
+        return $this->messageContent;
+    }
+}

src/Query/Messaging/Messages/ByConversation.php

@@ -2,7 +2,7 @@
 
 namespace Dvsa\Olcs\Transfer\Query\Messaging\Messages;
 
-use Dvsa\Olcs\Transfer\FieldType\Traits\Conversation;
+use Dvsa\Olcs\Transfer\FieldType\Traits\Messaging\Conversation;
 use Dvsa\Olcs\Transfer\Query\PagedQueryInterface;
 use Dvsa\Olcs\Transfer\Query\PagedTrait;
 use Dvsa\Olcs\Transfer\Query\AbstractQuery;