/**
* Method to parse input and extract the plain text. Because this method is
* called from both inside and outside the indexer, it needs to be able to
* batch out its parsing functionality to deal with the inefficiencies of
* regular expressions. We will parse recursively in 2KB chunks.
*
* @param string $input The input to parse.
*
* @return string The plain text input.
*
* @since 2.5
*/
public function parse($input)
{
// Strip invalid UTF-8 characters.
$input = iconv("utf-8", "utf-8//IGNORE", $input);
// Convert <style>, <noscript> and <head> tags to <script> tags
// so we can remove them efficiently.
$search = array('<style', '</style', '<noscript', '</noscript', '<head', '</head');
$replace = array('<script', '</script', '<script', '</script', '<script', '</script');
$input = str_replace($search, $replace, $input);
// Strip all script blocks.
$input = $this->removeBlocks($input, '<script', '</script>');
// Decode HTML entities.
$input = html_entity_decode($input, ENT_QUOTES, 'UTF-8');
// Convert entities equivalent to spaces to actual spaces.
$input = str_replace(array(' ', ' '), ' ', $input);
// This fixes issues such as '<h1>Title</h1><p>Paragraph</p>'
// being transformed into 'TitleParagraph' with no space.
$input = str_replace('>', '> ', $input);
// Strip HTML tags.
$input = strip_tags($input);
return parent::parse($input);
}
/**
* Method to parse input into plain text.
*
* @param string $input The raw input.
* @param string $format The format of the input. [optional]
*
* @return string The parsed input.
*
* @since 2.5
* @throws Exception on invalid parser.
*/
public static function parse($input, $format = 'html')
{
// Get a parser for the specified format and parse the input.
return FinderIndexerParser::getInstance($format)->parse($input);
}
/**
* Tests the getInstance method with a non-existing parser
*
* @return void
*
* @since 3.0
*
* @expectedException Exception
*/
public function testGetInstance_noParser()
{
FinderIndexerParser::getInstance('noway');
}
