/**
* Main function for prepare the useful email content
*
* @param $content string
* @return string
*/
public function recognizeUsefulContent($content = null)
{
if (!$content) {
$content = $this->getContent();
}
if ($this->isHtml($content)) {
$content = $this->HTMLPurifier->purify($content);
$content = $this->removeReplies($content);
} else {
$position = strpos($content, self::DELIMITER_LINE);
if ($position !== false) {
$content = substr($content, 0, $position);
}
$content = $this->markdown->defaultTransform($content);
}
return $content;
}
