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

plugins/php-mime-mail-parser/src/Contracts/CharsetManager.php

@@ -0,0 +1,24 @@
+<?php namespace PhpMimeMailParser\Contracts;
+
+interface CharsetManager
+{
+
+    /**
+     * Decode the string from Charset
+     *
+     * @param string $encodedString The string in its original encoded state
+     * @param string $charset       The Charset header of the part.
+     *
+     * @return string The decoded string
+     */
+    public function decodeCharset($encodedString, $charset);
+
+    /**
+     * Get charset alias
+     *
+     * @param string $charset .
+     *
+     * @return string The charset alias
+     */
+    public function getCharsetAlias($charset);
+}