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<?php
namespace Smush\Core\Parser;
use Smush\Core\LCP\LCP_Data;
use Smush\Core\LCP\LCP_Locator;
class Page_Parser {
/**
* @var string
*/
private $page_url;
/**
* @var string
*/
private $page_markup;
/**
* @var Parser
*/
private $parser;
/**
* @var LCP_Data
*/
private $lcp_data;
public function __construct( $page_url, $page_markup, $lcp_data = null ) {
$this->page_url = $page_url;
$this->page_markup = $page_markup;
$this->parser = new Parser();
$this->lcp_data = $lcp_data;
}
/**
* TODO: make sure this method is called as few times as possible
*
* @return Page
*/
public function parse_page() {
$page_markup = $this->page_markup;
$base_tag_url = $this->parser->get_base_url( $page_markup );
$base_url = $base_tag_url ?: $this->page_url;
$styles = $this->parser->get_inline_styles( $page_markup, $base_url );
if ( empty( $this->lcp_data ) ) {
$lcp_position = - 1;
} else {
$lcp_locator = new LCP_Locator( $this->lcp_data, $page_markup, $this->page_url );
$lcp_position = $lcp_locator->get_lcp_position();
}
$sub_element_positions = array();
$script_elements = $this->parser->get_composite_elements( $page_markup, $base_url, array( 'script', 'noscript' ), $lcp_position );
$sub_element_positions = $this->get_composite_sub_element_positions( $script_elements, $sub_element_positions );
$picture_elements = $this->parser->get_composite_elements( $page_markup, $base_url, array( 'picture' ), $lcp_position );
$sub_element_positions = $this->get_composite_sub_element_positions( $picture_elements, $sub_element_positions );
$elements = $this->parser->get_elements_with_image_attributes( $page_markup, $base_url, $lcp_position );
$elements = $this->remove_composite_sub_elements( $elements, $sub_element_positions );
$iframe_elements = $this->parser->get_iframe_elements( $page_markup, $base_url );
return new Page(
$this->page_url,
$this->page_markup,
$styles,
$picture_elements,
$elements,
$iframe_elements
);
}
/**
* @param $markup
* @param $composite_elements Composite_Element[]
*
* @return string
*/
private function replace_composites_with_placeholders( $markup, $composite_elements ) {
$placeholder_replacement = new Placeholder_Replacement();
if ( empty( $composite_elements ) ) {
return $markup;
}
$html_elements = array_map( function ( $composite_element ) {
return $composite_element->get_markup();
}, $composite_elements );
return $placeholder_replacement->add_placeholders( $markup, $html_elements );
}
/**
* @param array $composite_elements Composite_Element[]
*
* @return int[]
*/
private function get_composite_sub_element_positions( array $composite_elements, $sub_element_positions ): array {
foreach ( $composite_elements as $composite_element ) {
foreach ( $composite_element->get_elements() as $sub_element ) {
$sub_element_position = $sub_element->get_position();
if ( ! in_array( $sub_element_position, $sub_element_positions ) ) {
$sub_element_positions[] = $sub_element_position;
}
}
}
return $sub_element_positions;
}
/**
* @param Element[] $elements
* @param int[] $composite_sub_element_positions
*
* @return array
*/
private function remove_composite_sub_elements( $elements, $composite_sub_element_positions ): array {
if ( empty( $composite_sub_element_positions ) || ! is_array( $composite_sub_element_positions ) || ! is_array( $elements ) ) {
return $elements;
}
$filtered = array_filter( $elements, function ( $element ) use ( $composite_sub_element_positions ) {
return ! in_array( $element->get_position(), $composite_sub_element_positions );
} );
return array_values( $filtered );
}
}