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<?php
namespace Automattic\Jetpack_Boost\Lib\Critical_CSS\Source_Providers;
use Automattic\Jetpack_Boost\Lib\Critical_CSS\Critical_CSS_Storage;
use Automattic\Jetpack_Boost\Lib\Critical_CSS\Source_Providers\Providers\Archive_Provider;
use Automattic\Jetpack_Boost\Lib\Critical_CSS\Source_Providers\Providers\Cornerstone_Provider;
use Automattic\Jetpack_Boost\Lib\Critical_CSS\Source_Providers\Providers\Post_ID_Provider;
use Automattic\Jetpack_Boost\Lib\Critical_CSS\Source_Providers\Providers\Provider;
use Automattic\Jetpack_Boost\Lib\Critical_CSS\Source_Providers\Providers\Singular_Post_Provider;
use Automattic\Jetpack_Boost\Lib\Critical_CSS\Source_Providers\Providers\Taxonomy_Provider;
use Automattic\Jetpack_Boost\Lib\Critical_CSS\Source_Providers\Providers\WP_Core_Provider;
class Source_Providers {
/**
* Variable used to cache the CSS string during the page request.
* This is here because `get_critical_css` is called multiple
* times in `style_loader_tag` hook (on each CSS file).
*
* @var null|false|string
*/
protected $request_cached_css;
/**
* Stores the Critical CSS key used for rendering the current page if any.
*
* @var null|string
*/
protected $current_critical_css_key;
/**
* List of all the Critical CSS Types.
*
* The order is important because searching for critical CSS will stop as soon as a value is found.
* So finding Critical CSS by post ID is attempted before searching for a common Singular Post critical CSS.
*
* @var Provider[]
*/
protected $providers = array(
Cornerstone_Provider::class,
Post_ID_Provider::class,
WP_Core_Provider::class,
Singular_Post_Provider::class,
Archive_Provider::class,
Taxonomy_Provider::class,
);
public function get_providers() {
return $this->providers;
}
/**
* Returns the Provider which controls a given key.
*/
public function get_provider_for_key( $key ) {
foreach ( $this->providers as $provider ) {
if ( $provider::owns_key( $key ) ) {
return $provider;
}
}
return null;
}
/**
* Get all critical CSS storage keys that are available for the current request.
* Caches the result.
*
* @return array
*/
public function get_current_request_css_keys() {
static $keys = null;
if ( null !== $keys ) {
return $keys;
}
$keys = array();
foreach ( $this->providers as $provider ) {
$provider_keys = $provider::get_current_storage_keys();
if ( empty( $provider_keys ) ) {
continue;
}
$keys = array_merge( $keys, $provider_keys );
}
return $keys;
}
/**
* Get critical CSS for the current request.
*
* @return string|false
*/
public function get_current_request_css() {
if ( null !== $this->request_cached_css ) {
return $this->request_cached_css;
}
$storage = new Critical_CSS_Storage();
$data = $storage->get_css( $this->get_current_request_css_keys() );
if ( false === $data ) {
return false;
}
$this->request_cached_css = $data['css'];
$this->current_critical_css_key = $data['key'];
return $this->request_cached_css;
}
public function get_current_critical_css_key() {
return $this->current_critical_css_key;
}
/**
* Get providers sources.
*
* @return array
*/
public function get_provider_sources( $context_posts = array() ) {
$sources = array();
$flat_core_and_cornerstone_urls = array();
$wp_core_provider_urls = WP_Core_Provider::get_critical_source_urls( $context_posts );
foreach ( $wp_core_provider_urls as $urls ) {
$flat_core_and_cornerstone_urls = array_merge( $flat_core_and_cornerstone_urls, $urls );
}
$cornerstone_provider_urls = Cornerstone_Provider::get_critical_source_urls( $context_posts );
foreach ( $cornerstone_provider_urls as $urls ) {
$flat_core_and_cornerstone_urls = array_merge( $flat_core_and_cornerstone_urls, $urls );
}
$flat_core_and_cornerstone_urls = array_values( array_unique( $flat_core_and_cornerstone_urls ) );
foreach ( $this->get_providers() as $provider ) {
$provider_name = $provider::get_provider_name();
// For each provider,
// Gather a list of URLs that are going to be used as Critical CSS source.
foreach ( $provider::get_critical_source_urls( $context_posts ) as $group => $urls ) {
if ( empty( $urls ) ) {
continue;
}
// This removes core and cornerstone URLs from the list of URLs,
// so they don't belong to two separate groups.
if ( ! in_array( $provider, array( WP_Core_Provider::class, Cornerstone_Provider::class ), true ) ) {
$urls = array_values( array_diff( $urls, $flat_core_and_cornerstone_urls ) );
}
if ( empty( $urls ) ) {
continue;
}
$urls = $this->make_absolute_urls( $urls );
$key = $provider_name . '_' . $group;
// For each provider
// Track the state and errors in a state array.
$sources[] = array(
'key' => $key,
'label' => $provider::describe_key( $key ),
/**
* Filters the URLs used by Critical CSS for each provider.
*
* @param array $urls The list of URLs to be used to generate critical CSS
* @param string $provider The provider name.
* @since 1.0.0
*/
'urls' => apply_filters( 'jetpack_boost_critical_css_urls', $urls, $provider ),
'success_ratio' => $provider::get_success_ratio(),
);
}
}
/**
* Filters the list of Critical CSS source providers.
*
* @param array $sources The list of Critical CSS source providers.
* @since 3.6.0
*/
return apply_filters( 'jetpack_boost_critical_css_providers', $sources );
}
/**
* Make URLs absolute.
*
* @param array $urls The list of URLs to make absolute.
*
* @return array
*/
private function make_absolute_urls( $urls ) {
$absolute_urls = array();
foreach ( $urls as $url ) {
if ( class_exists( '\WP_Http' ) && method_exists( '\WP_Http', 'make_absolute_url' ) ) {
$absolute_urls[] = \WP_Http::make_absolute_url( $url, home_url() );
continue;
}
if ( stripos( $url, home_url() ) === 0 ) {
$absolute_urls[] = $url;
} else {
$absolute_urls[] = home_url( $url );
}
}
return $absolute_urls;
}
}