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<?php
namespace Bitrix\Main\Mail;
class Converter
{
public static function htmlToText(string $body): string
{
$body = str_replace(array("\n","\r"), '', $body);
// get <body> inner html if exists
$innerBody = trim(preg_replace('/(.*?<body[^>]*>)(.*?)(<\/body>.*)/is', '$2', $body));
$body = $innerBody ?: $body;
// modify links to text version
$body = preg_replace_callback(
"%<a[^>]*?href=(['\"])(?<href>[^\1]*?)(?1)[^>]*?>(?<text>.*?)<\/a>%ims",
function ($matches)
{
$href = $matches['href'];
$text = trim($matches['text']);
if (!$href)
{
return $matches[0];
}
$text = strip_tags($text);
return ($text ? "$text:" : '') ."\n$href\n";
},
$body
);
// change <br> to new line
$body = preg_replace('/\<br(\s*)?\/?\>/i', "\n", $body);
$body = preg_replace('|(<style[^>]*>)(.*?)(<\/style>)|isU', '', $body);
$body = preg_replace('|(<script[^>]*>)(.*?)(<\/script>)|isU', '', $body);
// remove tags
$body = strip_tags($body);
// format text to the left side
$lines = [];
foreach (explode("\n", trim($body)) as $line)
{
$lines[] = trim($line);
}
// remove redundant new lines
$body = preg_replace("/[\\n]{2,}/", "\n\n", implode("\n", $lines));
// remove redundant spaces
$body = preg_replace("/[ \\t]{2,}/", " ", $body);
// decode html-entities
return html_entity_decode($body);
}
}