Ubuntu
options = $options;
}
/**
* Adjust HTML to have delay js structure.
*
* @param string $html Buffer html for the page.
*
* @return string
*/
public function delay_js( $html ) {
if ( ! $this->is_allowed() ) {
return $html;
}
$this->allowed_scripts = $this->prepare_allowed_scripts_regex();
if ( empty( $this->allowed_scripts ) ) {
return $html;
}
return $this->parse( $html );
}
/**
* Checks if is allowed to Delay JS.
*
* @since 3.7
*
* @return bool
*/
public function is_allowed() {
if ( rocket_bypass() ) {
return false;
}
if ( rocket_get_constant( 'DONOTROCKETOPTIMIZE' ) ) {
return false;
}
if ( is_rocket_post_excluded_option( 'delay_js' ) ) {
return false;
}
return (bool) $this->options->get( 'delay_js', 0 );
}
/**
* Parse the html and add/remove attributes from specific scripts.
*
* @param string $html Buffer html for the page.
*
* @return string
*/
private function parse( $html ) {
$replaced_html = preg_replace_callback( '/[^>]*)?>(?.*)?<\/script>/Uims', [ $this, 'replace_scripts' ], $html );
if ( empty( $replaced_html ) ) {
return $html;
}
return $replaced_html;
}
/**
* Callback method for preg_replace_callback that is used to adjust attributes for specific scripts.
*
* @param array $matches Matches array for scripts regex.
*
* @return string
*/
public function replace_scripts( $matches ) {
if (
empty( $this->allowed_scripts )
||
(
! empty( $this->allowed_scripts )
&&
! preg_match( '#(' . $this->allowed_scripts . ')#', $matches[0] )
)
) {
return $matches[0];
}
$src = '';
$matches['attr'] = trim( $matches['attr'] );
if ( ! empty( $matches['attr'] ) ) {
if ( preg_match( '/src=(["\'])(.*?)\1/', $matches['attr'], $src_matches ) ) {
$src = $src_matches[2];
// Remove the src attribute.
$matches['attr'] = str_replace( $src_matches[0], '', $matches['attr'] );
}
}
if ( empty( $src ) ) {
// Get the JS content.
if ( ! empty( $matches['content'] ) ) {
$src = 'data:text/javascript;base64,' . base64_encode( $matches['content'] );// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
}
}
if ( empty( $src ) ) {
return $matches[0];
}
return "";
}
/**
* Prepare allowed scripts to be used as regex.
*
* @return string
*/
private function prepare_allowed_scripts_regex() {
$delay_js_scripts = $this->options->get( 'delay_js_scripts', [] );
/**
* Filters JS files to included into delay JS.
*
* @since 3.7
*
* @param array $delay_js_scripts List of allowed JS files.
*/
$delay_js_scripts = (array) apply_filters( 'rocket_delay_js_scripts', $delay_js_scripts );
if ( empty( $delay_js_scripts ) ) {
return '';
}
foreach ( $delay_js_scripts as $i => $delay_js_script ) {
$delay_js_scripts[ $i ] = preg_quote( str_replace( '#', '\#', $delay_js_script ), '#' );
}
return implode( '|', $delay_js_scripts );
}
}