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<?php
declare( strict_types=1 );
namespace WP_Rocket\Engine\Optimization\RUCSS\Controller;
use WP_Rocket\Admin\Options_Data;
use WP_Rocket\Engine\Common\Context\ContextInterface;
use WP_Rocket\Engine\Optimization\CSSTrait;
use WP_Rocket\Engine\Optimization\DynamicLists\DefaultLists\DataManager;
use WP_Rocket\Engine\Optimization\RegexTrait;
use WP_Rocket\Engine\Optimization\RUCSS\Database\Queries\UsedCSS as UsedCSS_Query;
use WP_Rocket\Engine\Optimization\RUCSS\Jobs\Manager;
class UsedCSS {
use RegexTrait;
use CSSTrait;
/**
* UsedCss Query instance.
*
* @var UsedCSS_Query
*/
private $used_css_query;
/**
* Plugin options instance.
*
* @var Options_Data
*/
protected $options;
/**
* DataManager instance
*
* @var DataManager
*/
private $data_manager;
/**
* Filesystem instance
*
* @var Filesystem
*/
private $filesystem;
/**
* RUCSS context.
*
* @var ContextInterface
*/
protected $context;
/**
* External exclusions list, can be urls or attributes.
*
* @var array
*/
private $external_exclusions = [];
/**
* Inline CSS attributes exclusions patterns to be preserved on the page after treeshaking.
*
* @var string[]
*/
private $inline_atts_exclusions = [];
/**
* Inline CSS content exclusions patterns to be preserved on the page after treeshaking.
*
* @var string[]
*/
private $inline_content_exclusions = [];
/**
* Above the fold Job Manager.
*
* @var Manager
*/
private $manager;
/**
* Instantiate the class.
*
* @param Options_Data $options Options instance.
* @param UsedCSS_Query $used_css_query Usedcss Query instance.
* @param DataManager $data_manager DataManager instance.
* @param Filesystem $filesystem Filesystem instance.
* @param ContextInterface $context RUCSS context.
* @param Manager $manager RUCSS manager.
*/
public function __construct(
Options_Data $options,
UsedCSS_Query $used_css_query,
DataManager $data_manager,
Filesystem $filesystem,
ContextInterface $context,
Manager $manager
) {
$this->options = $options;
$this->used_css_query = $used_css_query;
$this->data_manager = $data_manager;
$this->filesystem = $filesystem;
$this->context = $context;
$this->manager = $manager;
}
/**
* Check if RUCSS option is enabled.
*
* Used inside the CRON so post object isn't there.
*
* @return bool
*/
public function is_enabled() {
return (bool) $this->options->get( 'remove_unused_css', 0 );
}
/**
* Start treeshaking the current page.
*
* @param string $html Buffet HTML for current page.
*
* @return string
*/
public function treeshake( string $html ): string {
if ( ! $this->context->is_allowed() ) {
return $html;
}
$clean_html = $this->hide_comments( $html );
$clean_html = $this->hide_noscripts( $clean_html );
$clean_html = $this->hide_scripts( $clean_html );
if ( ! $this->html_has_title_tag( $clean_html ) ) {
return $html;
}
global $wp;
$url = untrailingslashit( home_url( add_query_arg( [], $wp->request ) ) );
$is_mobile = $this->is_mobile();
$used_css = $this->used_css_query->get_row( $url, $is_mobile );
if ( ! is_object( $used_css ) ) {
$this->manager->add_url_to_the_queue( $url, $is_mobile );
return $html;
}
if ( 'completed' !== $used_css->status || empty( $used_css->hash ) ) {
return $html;
}
$used_css_content = $this->filesystem->get_used_css( $used_css->hash );
if ( empty( $used_css_content ) ) {
$this->used_css_query->delete_by_url( $url );
return $html;
}
$html = $this->remove_used_css_from_html( $clean_html, $html );
$html = $this->add_used_css_to_html( $html, $used_css_content );
$html = $this->add_used_fonts_preload( $html, $used_css_content );
$html = $this->remove_google_font_preconnect( $html );
if ( ! empty( $used_css->id ) ) {
$this->used_css_query->update_last_accessed( (int) $used_css->id );
}
return $html;
}
/**
* Delete used css based on URL.
*
* @param string $url The page URL.
*
* @return boolean
*/
public function delete_used_css( string $url ): bool {
$used_css_arr = $this->used_css_query->get_rows_by_url( $url );
if ( empty( $used_css_arr ) ) {
return false;
}
$deleted = true;
foreach ( $used_css_arr as $used_css ) {
if ( ! is_object( $used_css ) || empty( $used_css->id ) ) {
continue;
}
$deleted = $deleted && $this->used_css_query->delete_item( $used_css->id );
if ( ! empty( $used_css->hash ) ) {
$count = $this->used_css_query->count_rows_by_hash( $used_css->hash );
if ( 0 === $count ) {
$this->filesystem->delete_used_css( $used_css->hash );
}
}
}
return $deleted;
}
/**
* Deletes all the used CSS files
*
* @since 3.11.4
*
* @return void
*/
public function delete_all_used_css() {
$this->filesystem->delete_all_used_css();
}
/**
* Alter HTML and remove all CSS which was processed from HTML page.
*
* @param string $clean_html Cleaned HTML after removing comments, noscripts and scripts.
* @param string $html HTML content.
*
* @return string HTML content.
*/
private function remove_used_css_from_html( string $clean_html, string $html ): string {
$this->set_inline_exclusions_lists();
$html = $this->remove_external_styles_from_html( $clean_html, $html );
return $this->remove_internal_styles_from_html( $clean_html, $html );
}
/**
* Remove external styles from the page's HTML.
*
* @param string $clean_html Cleaned HTML after removing comments, noscripts and scripts.
* @param string $html Actual page's HTML.
*
* @return string
*/
private function remove_external_styles_from_html( string $clean_html, string $html ) {
$link_styles = $this->find(
'<link\s+([^>]+[\s"\'])?href\s*=\s*[\'"]\s*?(?<url>[^\'"]+(?:\?[^\'"]*)?)\s*?[\'"]([^>]+)?\/?>',
$clean_html,
'Uis'
);
$preserve_google_font = apply_filters( 'rocket_rucss_preserve_google_font', false );
$external_exclusions = $this->validate_array_and_quote(
/**
* Filters the array of external exclusions.
*
* @since 3.11.4
*
* @param array $external_exclusions Array of patterns used to match against the external style tag.
*/
(array) apply_filters( 'rocket_rucss_external_exclusions', $this->external_exclusions )
);
foreach ( $link_styles as $style ) {
if (
(
! (bool) preg_match( '/rel=[\'"]?stylesheet[\'"]?/is', $style[0] )
&&
! ( (bool) preg_match( '/rel=[\'"]?preload[\'"]?/is', $style[0] ) && (bool) preg_match( '/as=[\'"]?style[\'"]?/is', $style[0] ) )
)
||
( $preserve_google_font && strstr( $style['url'], '//fonts.googleapis.com/css' ) )
) {
continue;
}
if ( ! empty( $external_exclusions ) && $this->find( implode( '|', $external_exclusions ), $style[0] ) ) {
continue;
}
$html = str_replace( $style[0], '', $html );
}
return (string) $html;
}
/**
* Remove internal styles from the page's HTML.
*
* @param string $clean_html Cleaned HTML after removing comments, noscripts and scripts.
* @param string $html Actual page's HTML.
*
* @return string
*/
private function remove_internal_styles_from_html( string $clean_html, string $html ) {
$inline_styles = $this->find(
'<style(?<atts>.*)>(?<content>.*)<\/style\s*>',
$clean_html
);
$inline_atts_exclusions = $this->validate_array_and_quote(
/**
* Filters the array of inline CSS attributes patterns to preserve
*
* @since 3.11
*
* @param array $inline_atts_exclusions Array of patterns used to match against the inline CSS attributes.
*/
(array) apply_filters( 'rocket_rucss_inline_atts_exclusions', $this->inline_atts_exclusions )
);
$inline_content_exclusions = $this->validate_array_and_quote(
/**
* Filters the array of inline CSS content patterns to preserve
*
* @since 3.11
*
* @param array $inline_atts_exclusions Array of patterns used to match against the inline CSS content.
*/
(array) apply_filters( 'rocket_rucss_inline_content_exclusions', $this->inline_content_exclusions )
);
foreach ( $inline_styles as $style ) {
if ( ! empty( $inline_atts_exclusions ) && $this->find( implode( '|', $inline_atts_exclusions ), $style['atts'] ) ) {
continue;
}
if ( ! empty( $inline_content_exclusions ) && $this->find( implode( '|', $inline_content_exclusions ), $style['content'] ) ) {
continue;
}
/**
* Filters the status of preserving inline style tags.
*
* @since 3.11.4
*
* @param bool $preserve_status Status of preserve.
* @param array $style Full match style tag.
*/
if ( apply_filters( 'rocket_rucss_preserve_inline_style_tags', true, $style ) ) {
$content = trim( $style['content'] );
if ( empty( $content ) ) {
continue;
}
$empty_tag = str_replace( $style['content'], '', $style[0] );
$html = str_replace( $style[0], $empty_tag, $html );
continue;
}
$html = str_replace( $style[0], '', $html );
}
return $html;
}
/**
* Alter HTML string and add the used CSS style in <head> tag,
*
* @param string $html HTML content.
* @param string $used_css Used CSS content.
*
* @return string HTML content.
*/
private function add_used_css_to_html( string $html, string $used_css ): string {
$replace = preg_replace(
'#</title>#iU',
'</title>' . $this->get_used_css_markup( $used_css ),
$html,
1
);
if ( null === $replace ) {
return $html;
}
return $replace;
}
/**
* Return Markup for used_css into the page.
*
* @param string $used_css Used CSS content.
*
* @return string
*/
private function get_used_css_markup( string $used_css ): string {
/**
* Filters Used CSS content before output.
*
* @since 3.9.0.2
*
* @param string $used_css Used CSS content.
*/
$used_css = apply_filters( 'rocket_usedcss_content', $used_css );
$used_css = str_replace( '\\', '\\\\', $used_css );// Guard the backslashes before passing the content to preg_replace.
$used_css = $this->handle_charsets( $used_css, false );
return sprintf(
'<style id="wpr-usedcss">%s</style>',
$used_css
);
}
/**
* Determines if the page is mobile and separate cache for mobile files is enabled.
*
* @return boolean
*/
private function is_mobile(): bool {
return $this->options->get( 'cache_mobile', 0 )
&& $this->options->get( 'do_caching_mobile_files', 0 )
&& wp_is_mobile();
}
/**
* Clear specific url.
*
* @param string $url Page url.
*
* @return void
*/
public function clear_url_usedcss( string $url ) {
$this->delete_used_css( $url );
/**
* Fires after clearing usedcss for specific url.
*
* @since 3.11
*
* @param string $url Current page URL.
*/
do_action( 'rocket_rucss_after_clearing_usedcss', $url );
}
/**
* Get the count of not completed rows.
*
* @return int
*/
public function get_not_completed_count() {
return $this->used_css_query->get_not_completed_count();
}
/**
* Add preload links for the fonts in the used CSS
*
* @param string $html HTML content.
* @param string $used_css Used CSS content.
*
* @return string
*/
private function add_used_fonts_preload( string $html, string $used_css ): string {
/**
* Filters the fonts preload from the used CSS
*
* @since 3.11
*
* @param bool $enable True to enable, false to disable.
*/
if ( ! apply_filters( 'rocket_enable_rucss_fonts_preload', true ) ) {
return $html;
}
if ( ! preg_match_all( '/@font-face\s*{\s*(?<content>[^}]+)}/is', $used_css, $font_faces, PREG_SET_ORDER ) ) {
return $html;
}
if ( empty( $font_faces ) ) {
return $html;
}
/**
* Filters the list of fonts to exclude from preload
*
* @since 3.15.10
*
* @param array $excluded_fonts_preload List of fonts to exclude from preload
*/
$exclude_fonts_preload = apply_filters( 'rocket_exclude_rucss_fonts_preload', [] );
if ( ! is_array( $exclude_fonts_preload ) ) {
$exclude_fonts_preload = [];
}
$urls = [];
foreach ( $font_faces as $font_face ) {
if ( empty( $font_face['content'] ) ) {
continue;
}
$font_url = $this->extract_first_font( $font_face['content'] );
/**
* Filters font URL with CDN hostname
*
* @since 3.11.4
*
* @param string $url url to be rewritten.
*/
$font_url = apply_filters( 'rocket_font_url', $font_url );
if ( empty( $font_url ) ) {
continue;
}
// Making sure the excluded fonts array isn't empty to avoid excluding all fonts.
if ( ! empty( $exclude_fonts_preload ) ) {
$exclude_fonts_preload = array_filter( $exclude_fonts_preload );
// Combine the array elements into a single string with | as a separator and returning a pattern.
$exclude_fonts_preload_pattern = implode(
'|',
array_map(
function ( $item ) {
return is_string( $item ) ? preg_quote( $item, '/' ) : '';
},
$exclude_fonts_preload
)
);
// Check if the font URL matches any part of the exclude_fonts_preload array.
if ( ! empty( $exclude_fonts_preload_pattern ) && preg_match( '/' . $exclude_fonts_preload_pattern . '/i', $font_url ) ) {
continue; // Skip this iteration as the font URL is in the exclusion list.
}
}
$urls[] = $font_url;
}
if ( empty( $urls ) ) {
return $html;
}
$urls = array_unique( $urls );
$replace = preg_replace(
'#</title>#iU',
'</title>' . $this->preload_links( $urls ),
$html,
1
);
if ( null === $replace ) {
return $html;
}
return $replace;
}
/**
* Remove preconnect tag for google api.
*
* @param string $html html content.
*
* @return string
*/
protected function remove_google_font_preconnect( string $html ): string {
$clean_html = $this->hide_comments( $html );
$clean_html = $this->hide_noscripts( $clean_html );
$clean_html = $this->hide_scripts( $clean_html );
$links = $this->find(
'<link\s+([^>]+[\s"\'])?rel\s*=\s*[\'"]((preconnect)|(dns-prefetch))[\'"]([^>]+)?\/?>',
$clean_html,
'Uis'
);
foreach ( $links as $link ) {
if ( preg_match( '/href=[\'"](https:)?\/\/fonts.googleapis.com\/?[\'"]/', $link[0] ) ) {
$html = str_replace( $link[0], '', $html );
}
}
return $html;
}
/**
* Extracts the first font URL from the font-face declaration
*
* Skips .eot fonts if it exists
*
* @since 3.11
*
* @param string $font_face Font-face declaration content.
*
* @return string
*/
private function extract_first_font( string $font_face ): string {
if ( ! preg_match_all( '/src:\s*(?<urls>[^;}]*)/is', $font_face, $sources, PREG_SET_ORDER ) ) {
return '';
}
foreach ( $sources as $src ) {
if ( empty( $src['urls'] ) ) {
continue;
}
$urls = explode( ',', $src['urls'] );
foreach ( $urls as $url ) {
if ( false !== strpos( $url, '.eot' ) ) {
continue;
}
if ( ! preg_match( '/url\(\s*[\'"]?(?<url>[^\'")]+)[\'"]?\)/is', $url, $matches ) ) {
continue;
}
return trim( $matches['url'] );
}
}
return '';
}
/**
* Converts an array of URLs to preload link tags
*
* @param array $urls An array of URLs.
*
* @return string
*/
private function preload_links( array $urls ): string {
$links = '';
foreach ( $urls as $url ) {
$links .= '<link rel="preload" data-rocket-preload as="font" href="' . esc_url( $url ) . '" crossorigin>';
}
return $links;
}
/**
* Set Rucss inline attr exclusions
*
* @return void
*/
private function set_inline_exclusions_lists() {
$wpr_dynamic_lists = $this->data_manager->get_lists();
$this->inline_atts_exclusions = isset( $wpr_dynamic_lists->rucss_inline_atts_exclusions ) ? $wpr_dynamic_lists->rucss_inline_atts_exclusions : [];
$this->inline_content_exclusions = isset( $wpr_dynamic_lists->rucss_inline_content_exclusions ) ? $wpr_dynamic_lists->rucss_inline_content_exclusions : [];
}
/**
* Displays a notice if the used CSS folder is not writable
*
* @since 3.11.4
*
* @return void
*/
public function notice_write_permissions() {
if ( ! current_user_can( 'rocket_manage_options' ) ) {
return;
}
if ( ! $this->is_enabled() ) {
return;
}
if ( $this->filesystem->is_writable_folder() ) {
return;
}
$message = rocket_notice_writing_permissions( trim( str_replace( rocket_get_constant( 'ABSPATH', '' ), '', rocket_get_constant( 'WP_ROCKET_USED_CSS_PATH', '' ) ), '/' ) );
rocket_notice_html(
[
'status' => 'error',
'dismissible' => '',
'message' => $message,
]
);
}
/**
* Validate the items in array to be strings only and preg_quote them.
*
* @param array $items Array to be validated and quoted.
*
* @return array|string[]
*/
private function validate_array_and_quote( array $items ) {
$items_array = array_filter( $items, 'is_string' );
return array_map(
static function ( $item ) {
return preg_quote( $item, '/' );
},
$items_array
);
}
/**
* Check if database has at least one completed row.
*
* @return bool
*/
public function has_one_completed_row_at_least() {
return $this->used_css_query->get_completed_count() > 0;
}
}