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vendor/symfony/mime/RawMessage.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Mime;
+
+use Symfony\Component\Mime\Exception\LogicException;
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class RawMessage
+{
+    private iterable|string $message;
+    private bool $isGeneratorClosed;
+
+    public function __construct(iterable|string $message)
+    {
+        $this->message = $message;
+    }
+
+    public function toString(): string
+    {
+        if (\is_string($this->message)) {
+            return $this->message;
+        }
+
+        $message = '';
+        foreach ($this->message as $chunk) {
+            $message .= $chunk;
+        }
+
+        return $this->message = $message;
+    }
+
+    public function toIterable(): iterable
+    {
+        if ($this->isGeneratorClosed ?? false) {
+            trigger_deprecation('symfony/mime', '6.4', 'Sending an email with a closed generator is deprecated and will throw in 7.0.');
+            // throw new LogicException('Unable to send the email as its generator is already closed.');
+        }
+
+        if (\is_string($this->message)) {
+            yield $this->message;
+
+            return;
+        }
+
+        if ($this->message instanceof \Generator) {
+            $message = '';
+            foreach ($this->message as $chunk) {
+                $message .= $chunk;
+                yield $chunk;
+            }
+            $this->isGeneratorClosed = !$this->message->valid();
+            $this->message = $message;
+
+            return;
+        }
+
+        foreach ($this->message as $chunk) {
+            yield $chunk;
+        }
+    }
+
+    /**
+     * @return void
+     *
+     * @throws LogicException if the message is not valid
+     */
+    public function ensureValidity()
+    {
+    }
+
+    public function __serialize(): array
+    {
+        return [$this->toString()];
+    }
+
+    public function __unserialize(array $data): void
+    {
+        [$this->message] = $data;
+    }
+}