Add new optional beta email parser thats based on ImapEngine instead of Webklex

plugins/vendor/zbateson/mail-mime-parser/src/Header/Consumer/ParameterValueConsumerService.php

@@ -0,0 +1,64 @@
+<?php
+/**
+ * This file is part of the ZBateson\MailMimeParser project.
+ *
+ * @license http://opensource.org/licenses/bsd-license.php BSD
+ */
+
+namespace ZBateson\MailMimeParser\Header\Consumer;
+
+use Psr\Log\LoggerInterface;
+use ZBateson\MailMimeParser\Header\Part\MimeTokenPartFactory;
+
+/**
+ * Starts processing tokens after a '=' character is found, indicating the
+ * 'value' portion of a name/value pair in a parameter header.
+ *
+ * The value portion will consist of all tokens, quoted parts, and comment parts
+ * parsed up to a semi-colon token indicating control should be returned to the
+ * parent ParameterNameValueConsumerService.
+ *
+ * @author Zaahid Bateson
+ */
+class ParameterValueConsumerService extends GenericConsumerMimeLiteralPartService
+{
+    public function __construct(
+        LoggerInterface $logger,
+        MimeTokenPartFactory $partFactory,
+        CommentConsumerService $commentConsumerService,
+        QuotedStringMimeLiteralPartConsumerService $quotedStringConsumerService
+    ) {
+        parent::__construct(
+            $logger,
+            $partFactory,
+            $commentConsumerService,
+            $quotedStringConsumerService
+        );
+    }
+
+    /**
+     * Returns semi-colon and equals char as token separators.
+     *
+     * @return string[]
+     */
+    protected function getTokenSeparators() : array
+    {
+        return \array_merge(parent::getTokenSeparators(), ['=', ';']);
+    }
+
+    /**
+     * Returns true if the token is an '=' character.
+     */
+    protected function isStartToken(string $token) : bool
+    {
+        return ($token === '=');
+    }
+
+    /**
+     * Returns true if the token is a ';' character.
+     */
+    protected function isEndToken(string $token) : bool
+    {
+        return ($token === ';');
+    }
+}