make compatible between different SMS types

src/ValueObject/SmsBinaryMessage.php

@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace D3\LinkmobilityClient\ValueObject;
+
+use Phlib\SmsLength\SmsLength;
+
+class SmsBinaryMessage extends SmsMessageAbstract
+{
+    /**
+     * @param string $message
+     */
+    public function __construct(string $message)
+    {
+        parent::__construct( $message);
+
+        $smsLength = new SmsLength($this->value);
+        $smsLength->validate();
+    }
+
+    public function getMessageContent()
+    {
+        return str_split(
+            base64_encode($this->value),
+            SmsLength::MAXIMUM_CHARACTERS_UCS2_SINGLE
+        );
+    }
+}