Added yaml encoder class

Author: repejota

src/Nats/Encoders/YAMLEncoder.php

@@ -0,0 +1,40 @@
+<?php
+namespace Nats\Encoders;
+
+/**
+ * Class YAMLEncoder
+ *
+ * Encodes and decodes messages in YAML format.
+ *
+ * @package Nats
+ */
+class YAMLEncoder implements Encoder
+{
+
+
+    /**
+     * Encodes a message to YAML.
+     *
+     * @param string $payload Message to decode.
+     *
+     * @return mixed
+     */
+    public function encode($payload)
+    {
+        $payload = yaml_emit($payload);
+        return $payload;
+    }
+
+    /**
+     * Decodes a message from YAML.
+     *
+     * @param string $payload Message to decode.
+     *
+     * @return mixed
+     */
+    public function decode($payload)
+    {
+        $payload = yaml_parse($payload);
+        return $payload;
+    }
+}