Add PHP Mime Mail Parser - https://github.com/php/pecl-mail-mailparse

plugins/php-mime-mail-parser/src/Middleware.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace PhpMimeMailParser;
+
+/**
+ * Wraps a callable as a Middleware
+ */
+class Middleware implements Contracts\Middleware
+{
+    protected $parser;
+
+    /**
+     * Create a middleware using a callable $fn
+     *
+     * @param callable $fn
+     */
+    public function __construct(callable $fn)
+    {
+        $this->parser = $fn;
+    }
+
+    /**
+     * Process a mime part, optionally delegating parsing to the $next MiddlewareStack
+     */
+    public function parse(MimePart $part, MiddlewareStack $next)
+    {
+        return call_user_func($this->parser, $part, $next);
+    }
+}