106 lines
3.3 KiB
PHP
106 lines
3.3 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Bridge\Twig\Mime;
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use League\HTMLToMarkdown\HtmlConverter;
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use Symfony\Component\Mime\BodyRendererInterface;
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use Symfony\Component\Mime\Exception\InvalidArgumentException;
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use Symfony\Component\Mime\Message;
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use Twig\Environment;
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/**
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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final class BodyRenderer implements BodyRendererInterface
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{
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private $twig;
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private $context;
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private $converter;
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public function __construct(Environment $twig, array $context = [])
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{
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$this->twig = $twig;
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$this->context = $context;
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if (class_exists(HtmlConverter::class)) {
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$this->converter = new HtmlConverter([
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'hard_break' => true,
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'strip_tags' => true,
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'remove_nodes' => 'head style',
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]);
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}
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}
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public function render(Message $message): void
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{
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if (!$message instanceof TemplatedEmail) {
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return;
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}
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$messageContext = $message->getContext();
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$previousRenderingKey = $messageContext[__CLASS__] ?? null;
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unset($messageContext[__CLASS__]);
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$currentRenderingKey = $this->getFingerPrint($message);
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if ($previousRenderingKey === $currentRenderingKey) {
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return;
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}
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if (isset($messageContext['email'])) {
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throw new InvalidArgumentException(sprintf('A "%s" context cannot have an "email" entry as this is a reserved variable.', get_debug_type($message)));
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}
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$vars = array_merge($this->context, $messageContext, [
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'email' => new WrappedTemplatedEmail($this->twig, $message),
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]);
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if ($template = $message->getTextTemplate()) {
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$message->text($this->twig->render($template, $vars));
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}
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if ($template = $message->getHtmlTemplate()) {
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$message->html($this->twig->render($template, $vars));
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}
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// if text body is empty, compute one from the HTML body
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if (!$message->getTextBody() && null !== $html = $message->getHtmlBody()) {
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$message->text($this->convertHtmlToText(\is_resource($html) ? stream_get_contents($html) : $html));
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}
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$message->context($message->getContext() + [__CLASS__ => $currentRenderingKey]);
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}
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private function getFingerPrint(TemplatedEmail $message): string
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{
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$messageContext = $message->getContext();
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unset($messageContext[__CLASS__]);
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$payload = [$messageContext, $message->getTextTemplate(), $message->getHtmlTemplate()];
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try {
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$serialized = serialize($payload);
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} catch (\Exception $e) {
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// Serialization of 'Closure' is not allowed
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// Happens when context contain a closure, in that case, we assume that context always change.
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$serialized = random_bytes(8);
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}
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return md5($serialized);
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}
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private function convertHtmlToText(string $html): string
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{
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if (null !== $this->converter) {
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return $this->converter->convert($html);
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}
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return strip_tags(preg_replace('{<(head|style)\b.*?</\1>}is', '', $html));
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}
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}
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