N°4307 Replace SwiftMailer with Laminas-mail

lib/laminas/laminas-mail/src/Header/GenericMultiHeader.php

@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * @see       https://github.com/laminas/laminas-mail for the canonical source repository
+ * @copyright https://github.com/laminas/laminas-mail/blob/master/COPYRIGHT.md
+ * @license   https://github.com/laminas/laminas-mail/blob/master/LICENSE.md New BSD License
+ */
+
+namespace Laminas\Mail\Header;
+
+/**
+ * Generic class for Headers with multiple occurs in the same message
+ */
+class GenericMultiHeader extends GenericHeader implements MultipleHeadersInterface
+{
+    public static function fromString($headerLine)
+    {
+        list($fieldName, $fieldValue) = GenericHeader::splitHeaderLine($headerLine);
+        $fieldValue = HeaderWrap::mimeDecodeValue($fieldValue);
+
+        if (strpos($fieldValue, ',')) {
+            $headers = [];
+            foreach (explode(',', $fieldValue) as $multiValue) {
+                $headers[] = new static($fieldName, $multiValue);
+            }
+            return $headers;
+        }
+
+        return new static($fieldName, $fieldValue);
+    }
+
+    /**
+     * Cast multiple header objects to a single string header
+     *
+     * @param  array $headers
+     * @throws Exception\InvalidArgumentException
+     * @return string
+     */
+    public function toStringMultipleHeaders(array $headers)
+    {
+        $name   = $this->getFieldName();
+        $values = [$this->getFieldValue(HeaderInterface::FORMAT_ENCODED)];
+
+        foreach ($headers as $header) {
+            if (! $header instanceof static) {
+                throw new Exception\InvalidArgumentException(
+                    'This method toStringMultipleHeaders was expecting an array of headers of the same type'
+                );
+            }
+            $values[] = $header->getFieldValue(HeaderInterface::FORMAT_ENCODED);
+        }
+
+        return $name . ': ' . implode(',', $values);
+    }
+}