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<?php
/**
* Save generated cloud critical CSS.
*
* This endpoint is used by WP.com to push the generated CSS to the boost plugin.
*/
namespace Automattic\Jetpack_Boost\REST_API\Endpoints;
use Automattic\Jetpack_Boost\Lib\Critical_CSS\Critical_CSS_State;
use Automattic\Jetpack_Boost\Lib\Critical_CSS\Critical_CSS_Storage;
use Automattic\Jetpack_Boost\REST_API\Contracts\Endpoint;
use Automattic\Jetpack_Boost\REST_API\Permissions\Signed_With_Blog_Token;
use WP_REST_Server;
/**
* Handler for POST cloud-css/update. Expects the following body params:
* - success: boolean - False if the whole Critical CSS job failed.
* - message: string containing an error message if success is false.
* - providers: Object containing one result for each provider_key:
*
* Each provider key contains:
* - success: boolean - False if this provider key failed.
* - data: Either a successful CSS block, or a CSS error.
*
* Each CSS block looks like:
* - css: string - containing CSS data.
*
* Each CSS error looks like:
* - urls: Object describing each URL which failed. Keys are URLs.
*
* Each URL failure looks like:
* - message: string - containing an error message.
* - type: string - machine readable error type.
* - meta: Object - JSON string compatible object containing extra metadata for consumption in the UI.
*/
class Update_Cloud_CSS implements Endpoint {
public function name() {
return 'cloud-css/update';
}
public function request_methods() {
return WP_REST_Server::EDITABLE;
}
public function response( $request ) {
$state = new Critical_CSS_State();
$storage = new Critical_CSS_Storage();
$params = $request->get_params();
$providers = empty( $params['providers'] ) || ! is_array( $params['providers'] ) ? array() : $params['providers'];
$api_successful = array( 'success' => true );
// If success is false, the whole Cloud CSS generation process failed.
if ( empty( $params['success'] ) ) {
if ( empty( $params['message'] ) || ! is_string( $params['message'] ) ) {
$error = __( 'An unknown error occurred', 'jetpack-boost' );
} else {
$error = $params['message'];
}
$state->set_error( $error );
$state->save();
return $api_successful;
}
// Update each provider.
foreach ( $providers as $provider_key => $result ) {
if ( ! isset( $result['data'] ) ) {
return new \WP_Error( 'invalid_data', __( 'Invalid request; missing data element', 'jetpack-boost' ) );
}
$data = $result['data'];
// Success
if ( ! empty( $result['success'] ) && ! empty( $data['css'] ) && is_string( $data['css'] ) ) {
$storage->store_css( $provider_key, $data['css'] );
$state->set_provider_success( $provider_key );
continue;
}
// Failures must have an array of urls.
if ( empty( $data['urls'] ) || ! is_array( $data['urls'] ) ) {
return new \WP_Error( 'invalid_data', __( 'Invalid request; missing urls element', 'jetpack-boost' ) );
}
$state->set_provider_errors( $provider_key, $this->flatten_url_errors( $data['urls'] ) );
}
// Save the state changes.
$state->save();
return $api_successful;
}
/**
* Errors arrive from Shield in an associative array with the URL as the key.
* This function flattens the array into a list of assoc arrays with the URL in each member.
*/
private function flatten_url_errors( $errors ) {
$flat_errors = array();
foreach ( $errors as $url => $error ) {
$flat_errors[] = array_merge( array( 'url' => $url ), $error );
}
return $flat_errors;
}
public function permissions() {
return array(
new Signed_With_Blog_Token(),
);
}
}