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<?php
/**
* Class Google\Site_Kit\Core\Modules\Module
*
* @package Google\Site_Kit
* @copyright 2021 Google LLC
* @license https://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
* @link https://sitekit.withgoogle.com
*/
namespace Google\Site_Kit\Core\Modules;
use Closure;
use Exception;
use Google\Site_Kit\Context;
use Google\Site_Kit\Core\Assets\Assets;
use Google\Site_Kit\Core\Authentication\Clients\OAuth_Client;
use Google\Site_Kit\Core\Authentication\Exception\Insufficient_Scopes_Exception;
use Google\Site_Kit\Core\Authentication\Exception\Google_Proxy_Code_Exception;
use Google\Site_Kit\Core\Contracts\WP_Errorable;
use Google\Site_Kit\Core\Storage\Options;
use Google\Site_Kit\Core\Storage\User_Options;
use Google\Site_Kit\Core\Storage\Cache;
use Google\Site_Kit\Core\Authentication\Authentication;
use Google\Site_Kit\Core\Authentication\Clients\Google_Site_Kit_Client;
use Google\Site_Kit\Core\REST_API\Exception\Invalid_Datapoint_Exception;
use Google\Site_Kit\Core\REST_API\Data_Request;
use Google\Site_Kit\Core\Util\Feature_Flags;
use Google\Site_Kit_Dependencies\Google\Service as Google_Service;
use Google\Site_Kit_Dependencies\Google_Service_Exception;
use Google\Site_Kit_Dependencies\Psr\Http\Message\RequestInterface;
use Google\Site_Kit_Dependencies\TrueBV\Punycode;
use WP_Error;
/**
* Base class for a module.
*
* @since 1.0.0
* @access private
* @ignore
*
* @property-read string $slug Unique module identifier.
* @property-read string $name Module name.
* @property-read string $description Module description.
* @property-read int $order Module order within module lists.
* @property-read string $homepage External module homepage URL.
* @property-read array $depends_on List of other module slugs the module depends on.
* @property-read bool $force_active Whether the module cannot be disabled.
* @property-read bool $internal Whether the module is internal, thus without any UI.
*/
abstract class Module {
/**
* Plugin context.
*
* @since 1.0.0
* @var Context
*/
protected $context;
/**
* Option API instance.
*
* @since 1.0.0
* @var Options
*/
protected $options;
/**
* User Option API instance.
*
* @since 1.0.0
* @var User_Options
*/
protected $user_options;
/**
* Authentication instance.
*
* @since 1.0.0
* @var Authentication
*/
protected $authentication;
/**
* Assets API instance.
*
* @since 1.40.0
* @var Assets
*/
protected $assets;
/**
* Module information.
*
* @since 1.0.0
* @var array
*/
private $info = array();
/**
* Google API client instance.
*
* @since 1.0.0
* @var Google_Site_Kit_Client|null
*/
private $google_client;
/**
* Google services as $identifier => $service_instance pairs.
*
* @since 1.0.0
* @var array|null
*/
private $google_services;
/**
* Constructor.
*
* @since 1.0.0
*
* @param Context $context Plugin context.
* @param Options $options Optional. Option API instance. Default is a new instance.
* @param User_Options $user_options Optional. User Option API instance. Default is a new instance.
* @param Authentication $authentication Optional. Authentication instance. Default is a new instance.
* @param Assets $assets Optional. Assets API instance. Default is a new instance.
*/
public function __construct(
Context $context,
Options $options = null,
User_Options $user_options = null,
Authentication $authentication = null,
Assets $assets = null
) {
$this->context = $context;
$this->options = $options ?: new Options( $this->context );
$this->user_options = $user_options ?: new User_Options( $this->context );
$this->authentication = $authentication ?: new Authentication( $this->context, $this->options, $this->user_options );
$this->assets = $assets ?: new Assets( $this->context );
$this->info = $this->parse_info( (array) $this->setup_info() );
}
/**
* Registers functionality through WordPress hooks.
*
* @since 1.0.0
*/
abstract public function register();
/**
* Magic isset-er.
*
* Allows checking for existence of module information.
*
* @since 1.0.0
*
* @param string $key Key to check..
* @return bool True if value for $key is available, false otherwise.
*/
final public function __isset( $key ) {
return isset( $this->info[ $key ] );
}
/**
* Magic getter.
*
* Allows reading module information.
*
* @since 1.0.0
*
* @param string $key Key to get value for.
* @return mixed Value for $key, or null if not available.
*/
final public function __get( $key ) {
if ( ! isset( $this->info[ $key ] ) ) {
return null;
}
return $this->info[ $key ];
}
/**
* Returns all module information data for passing it to JavaScript.
*
* @since 1.0.0
*
* @return array Module information data.
*/
public function prepare_info_for_js() {
// TODO: Modify this to ditch unnecessary backward-compatibility.
return array(
'slug' => $this->slug,
'name' => $this->name,
'description' => $this->description,
'sort' => $this->order,
'homepage' => $this->homepage,
'required' => $this->depends_on,
'autoActivate' => $this->force_active,
'internal' => $this->internal,
'screenID' => $this instanceof Module_With_Screen ? $this->get_screen()->get_slug() : false,
'settings' => $this instanceof Module_With_Settings ? $this->get_settings()->get() : false,
);
}
/**
* Checks whether the module is connected.
*
* A module being connected means that all steps required as part of its activation are completed.
*
* @since 1.0.0
*
* @return bool True if module is connected, false otherwise.
*/
public function is_connected() {
return true;
}
/**
* Gets data for the given datapoint.
*
* @since 1.0.0
*
* @param string $datapoint Datapoint to get data for.
* @param array|Data_Request $data Optional. Contextual data to provide. Default empty array.
* @return mixed Data on success, or WP_Error on failure.
*/
final public function get_data( $datapoint, $data = array() ) {
return $this->execute_data_request(
new Data_Request( 'GET', 'modules', $this->slug, $datapoint, $data )
);
}
/**
* Sets data for the given datapoint.
*
* @since 1.0.0
*
* @param string $datapoint Datapoint to get data for.
* @param array|Data_Request $data Data to set.
* @return mixed Response data on success, or WP_Error on failure.
*/
final public function set_data( $datapoint, $data ) {
return $this->execute_data_request(
new Data_Request( 'POST', 'modules', $this->slug, $datapoint, $data )
);
}
/**
* Returns the list of datapoints the class provides data for.
*
* @since 1.0.0
*
* @return array List of datapoints.
*/
final public function get_datapoints() {
$keys = array();
$definitions = $this->get_datapoint_definitions();
foreach ( array_keys( $definitions ) as $key ) {
$parts = explode( ':', $key );
$name = end( $parts );
if ( ! empty( $name ) ) {
$keys[ $name ] = $name;
}
}
return array_values( $keys );
}
/**
* Returns the mapping between available datapoints and their services.
*
* @since 1.0.0
* @since 1.9.0 No longer abstract.
* @deprecated 1.12.0
*
* @return array Associative array of $datapoint => $service_identifier pairs.
*/
protected function get_datapoint_services() {
_deprecated_function( __METHOD__, '1.12.0', static::class . '::get_datapoint_definitions' ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
return array();
}
/**
* Gets map of datapoint to definition data for each.
*
* @since 1.9.0
*
* @return array Map of datapoints to their definitions.
*/
protected function get_datapoint_definitions() {
return array();
}
/**
* Creates a request object for the given datapoint.
*
* @since 1.0.0
*
* @param Data_Request $data Data request object.
* // phpcs:ignore Squiz.Commenting.FunctionComment.InvalidNoReturn
* @return RequestInterface|callable|WP_Error Request object or callable on success, or WP_Error on failure.
* @throws Invalid_Datapoint_Exception Override in a sub-class.
*/
protected function create_data_request( Data_Request $data ) {
throw new Invalid_Datapoint_Exception();
}
/**
* Parses a response for the given datapoint.
*
* @since 1.0.0
*
* @param Data_Request $data Data request object.
* @param mixed $response Request response.
*
* @return mixed Parsed response data on success, or WP_Error on failure.
*/
protected function parse_data_response( Data_Request $data, $response ) {
return $response;
}
/**
* Creates a request object for the given datapoint.
*
* @since 1.0.0
*
* @param Data_Request $data Data request object.
* @return mixed Data on success, or WP_Error on failure.
*
* phpcs:disable Squiz.Commenting.FunctionCommentThrowTag.Missing
*/
final protected function execute_data_request( Data_Request $data ) {
try {
$this->validate_data_request( $data );
$request = $this->make_data_request( $data );
if ( is_wp_error( $request ) ) {
return $request;
} elseif ( $request instanceof Closure ) {
$response = $request();
} elseif ( $request instanceof RequestInterface ) {
$response = $this->get_client()->execute( $request );
} else {
return new WP_Error(
'invalid_datapoint_request',
__( 'Invalid datapoint request.', 'google-site-kit' ),
array( 'status' => 400 )
);
}
} catch ( Exception $e ) {
return $this->exception_to_error( $e, $data->datapoint );
}
if ( is_wp_error( $response ) ) {
return $response;
}
return $this->parse_data_response( $data, $response );
}
/**
* Validates the given data request.
*
* @since 1.9.0
*
* @param Data_Request $data Data request object.
*
* @throws Invalid_Datapoint_Exception Thrown if the datapoint does not exist.
* @throws Insufficient_Scopes_Exception Thrown if the user has not granted
* necessary scopes required by the datapoint.
*/
private function validate_data_request( Data_Request $data ) {
$definitions = $this->get_datapoint_definitions();
$datapoint_key = "$data->method:$data->datapoint";
// All datapoints must be defined.
if ( empty( $definitions[ $datapoint_key ] ) ) {
throw new Invalid_Datapoint_Exception();
}
if ( ! $this instanceof Module_With_Scopes ) {
return;
}
$datapoint = $definitions[ $datapoint_key ];
$oauth_client = $this->authentication->get_oauth_client();
if ( ! empty( $datapoint['scopes'] ) && ! $oauth_client->has_sufficient_scopes( $datapoint['scopes'] ) ) {
// Otherwise, if the datapoint doesn't rely on a service but requires
// specific scopes, ensure they are satisfied.
$message = ! empty( $datapoint['request_scopes_message'] )
? $datapoint['request_scopes_message']
: __( 'You’ll need to grant Site Kit permission to do this.', 'google-site-kit' );
throw new Insufficient_Scopes_Exception( $message, 0, null, $datapoint['scopes'] );
}
$requires_service = ! empty( $datapoint['service'] );
if ( $requires_service && ! $oauth_client->has_sufficient_scopes( $this->get_scopes() ) ) {
// If the datapoint relies on a service which requires scopes and
// these have not been granted, fail the request with a permissions
// error (see issue #3227).
/* translators: %s: module name */
$message = sprintf( __( 'Site Kit can’t access the relevant data from %s because you haven’t granted all permissions requested during setup.', 'google-site-kit' ), $this->name );
throw new Insufficient_Scopes_Exception( $message, 0, null, $this->get_scopes() );
}
}
/**
* Facilitates the creation of a request object for execution.
*
* @since 1.9.0
*
* @param Data_Request $data Data request object.
* @return RequestInterface|Closure|WP_Error
*/
private function make_data_request( Data_Request $data ) {
$definitions = $this->get_datapoint_definitions();
// We only need to initialize the client if this datapoint relies on a service.
$requires_client = ! empty( $definitions[ "$data->method:$data->datapoint" ]['service'] );
if ( $requires_client ) {
$restore_defer = $this->with_client_defer( true );
}
$request = $this->create_data_request( $data );
if ( isset( $restore_defer ) ) {
$restore_defer();
}
return $request;
}
/**
* Parses a date range string into a start date and an end date.
*
* @since 1.0.0
*
* @param string $range Date range string. Either 'last-7-days', 'last-14-days', 'last-90-days', or
* 'last-28-days' (default).
* @param string $multiplier Optional. How many times the date range to get. This value can be specified if the
* range should be request multiple times back. Default 1.
* @param int $offset Days the range should be offset by. Default 1. Used by Search Console where
* data is delayed by two days.
* @param bool $previous Whether to select the previous period. Default false.
*
* @return array List with two elements, the first with the start date and the second with the end date, both as
* 'Y-m-d'.
*/
protected function parse_date_range( $range, $multiplier = 1, $offset = 1, $previous = false ) {
preg_match( '*-(\d+)-*', $range, $matches );
$number_of_days = $multiplier * ( isset( $matches[1] ) ? $matches[1] : 28 );
// Calculate the end date. For previous period requests, offset period by the number of days in the request.
$end_date_offset = $previous ? $offset + $number_of_days : $offset;
$date_end = gmdate( 'Y-m-d', strtotime( $end_date_offset . ' days ago' ) );
// Set the start date.
$start_date_offset = $end_date_offset + $number_of_days - 1;
$date_start = gmdate( 'Y-m-d', strtotime( $start_date_offset . ' days ago' ) );
return array( $date_start, $date_end );
}
/**
* Gets the output for a specific frontend hook.
*
* @since 1.0.0
*
* @param string $hook Frontend hook name, e.g. 'wp_head', 'wp_footer', etc.
* @return string Output the hook generates.
*/
final protected function get_frontend_hook_output( $hook ) {
$current_user_id = get_current_user_id();
// Unset current user to make WordPress behave as if nobody was logged in.
wp_set_current_user( false );
ob_start();
do_action( $hook );
$output = ob_get_clean();
// Restore the current user.
wp_set_current_user( $current_user_id );
return $output;
}
/**
* Permutes site URL to cover all different variants of it (not considering the path).
*
* @since 1.0.0
*
* @param string $site_url Site URL to get permutations for.
* @return array List of permutations.
*/
final protected function permute_site_url( $site_url ) {
$hostname = wp_parse_url( $site_url, PHP_URL_HOST );
$path = wp_parse_url( $site_url, PHP_URL_PATH );
return array_reduce(
$this->permute_site_hosts( $hostname ),
function ( $urls, $host ) use ( $path ) {
$host_with_path = $host . $path;
array_push( $urls, "https://$host_with_path", "http://$host_with_path" );
return $urls;
},
array()
);
}
/**
* Generates common variations of the given hostname.
*
* Returns a list of hostnames that includes:
* - (if IDN) in Punycode encoding
* - (if IDN) in Unicode encoding
* - with and without www. subdomain (including IDNs)
*
* @since 1.38.0
*
* @param string $hostname Hostname to generate variations of.
* @return string[] Hostname variations.
*/
protected function permute_site_hosts( $hostname ) {
$punycode = new Punycode();
// See \Requests_IDNAEncoder::is_ascii.
$is_ascii = preg_match( '/(?:[^\x00-\x7F])/', $hostname ) !== 1;
$is_www = 0 === strpos( $hostname, 'www.' );
// Normalize hostname without www.
$hostname = $is_www ? substr( $hostname, strlen( 'www.' ) ) : $hostname;
$hosts = array( $hostname, "www.$hostname" );
try {
// An ASCII hostname can only be non-IDN or punycode-encoded.
if ( $is_ascii ) {
// If the hostname is in punycode encoding, add the decoded version to the list of hosts.
if ( 0 === strpos( $hostname, Punycode::PREFIX ) || false !== strpos( $hostname, '.' . Punycode::PREFIX ) ) {
$host_decoded = $punycode->decode( $hostname );
array_push( $hosts, $host_decoded, "www.$host_decoded" );
}
} else {
// If it's not ASCII, then add the punycode encoded version.
$host_encoded = $punycode->encode( $hostname );
array_push( $hosts, $host_encoded, "www.$host_encoded" );
}
} catch ( Exception $exception ) { // phpcs:ignore Generic.CodeAnalysis.EmptyStatement.DetectedCatch
// Do nothing.
}
return $hosts;
}
/**
* Gets the Google client the module uses.
*
* This method should be used to access the client.
*
* @since 1.0.0
* @since 1.2.0 Now returns Google_Site_Kit_Client instance.
* @since 1.35.0 Updated to be public.
*
* @return Google_Site_Kit_Client Google client instance.
*
* @throws Exception Thrown when the module did not correctly set up the client.
*/
final public function get_client() {
if ( null === $this->google_client ) {
$client = $this->setup_client();
if ( ! $client instanceof Google_Site_Kit_Client ) {
throw new Exception( __( 'Google client not set up correctly.', 'google-site-kit' ) );
}
$this->google_client = $client;
}
return $this->google_client;
}
/**
* Gets the Google service for the given identifier.
*
* This method should be used to access Google services.
*
* @since 1.0.0
*
* @param string $identifier Identifier for the service.
* @return Google_Service Google service instance.
*
* @throws Exception Thrown when the module did not correctly set up the services or when the identifier is invalid.
*/
final protected function get_service( $identifier ) {
if ( null === $this->google_services ) {
$services = $this->setup_services( $this->get_client() );
if ( ! is_array( $services ) ) {
throw new Exception( __( 'Google services not set up correctly.', 'google-site-kit' ) );
}
foreach ( $services as $service ) {
if ( ! $service instanceof Google_Service ) {
throw new Exception( __( 'Google services not set up correctly.', 'google-site-kit' ) );
}
}
$this->google_services = $services;
}
if ( ! isset( $this->google_services[ $identifier ] ) ) {
/* translators: %s: service identifier */
throw new Exception( sprintf( __( 'Google service identified by %s does not exist.', 'google-site-kit' ), $identifier ) );
}
return $this->google_services[ $identifier ];
}
/**
* Sets up information about the module.
*
* @since 1.0.0
*
* @return array Associative array of module info.
*/
abstract protected function setup_info();
/**
* Sets up the Google client the module should use.
*
* This method is invoked once by {@see Module::get_client()} to lazily set up the client when it is requested
* for the first time.
*
* @since 1.0.0
* @since 1.2.0 Now returns Google_Site_Kit_Client instance.
*
* @return Google_Site_Kit_Client Google client instance.
*/
protected function setup_client() {
return $this->authentication->get_oauth_client()->get_client();
}
/**
* Sets up the Google services the module should use.
*
* This method is invoked once by {@see Module::get_service()} to lazily set up the services when one is requested
* for the first time.
*
* @since 1.0.0
* @since 1.2.0 Now requires Google_Site_Kit_Client instance.
*
* @param Google_Site_Kit_Client $client Google client instance.
* @return array Google services as $identifier => $service_instance pairs. Every $service_instance must be an
* instance of Google_Service.
*/
protected function setup_services( Google_Site_Kit_Client $client ) {
return array();
}
/**
* Sets whether or not to return raw requests and returns a callback to reset to the previous value.
*
* @since 1.2.0
*
* @param bool $defer Whether or not to return raw requests.
* @return callable Callback function that resets to the original $defer value.
*/
protected function with_client_defer( $defer ) {
return $this->get_client()->withDefer( $defer );
}
/**
* Parses information about the module.
*
* @since 1.0.0
*
* @param array $info Associative array of module info.
* @return array Parsed $info.
*/
private function parse_info( array $info ) {
$info = wp_parse_args(
$info,
array(
'slug' => '',
'name' => '',
'description' => '',
'order' => 10,
'homepage' => '',
'feature' => '',
'depends_on' => array(),
'force_active' => static::is_force_active(),
'internal' => false,
)
);
if ( empty( $info['name'] ) && ! empty( $info['slug'] ) ) {
$info['name'] = $info['slug'];
}
$info['depends_on'] = (array) $info['depends_on'];
return $info;
}
/**
* Transforms an exception into a WP_Error object.
*
* @since 1.0.0
* @since 1.49.0 Uses the new `Google_Proxy::setup_url_v2` method when the `serviceSetupV2` feature flag is enabled.
* @since 1.70.0 $datapoint parameter is optional.
*
* @param Exception $e Exception object.
* @param string $datapoint Optional. Datapoint originally requested. Default is an empty string.
* @return WP_Error WordPress error object.
*/
protected function exception_to_error( Exception $e, $datapoint = '' ) {
if ( $e instanceof WP_Errorable ) {
return $e->to_wp_error();
}
$code = $e->getCode();
$message = $e->getMessage();
$status = is_numeric( $code ) && $code ? (int) $code : 500;
$reason = '';
$reconnect_url = '';
if ( $e instanceof Google_Service_Exception ) {
$errors = $e->getErrors();
if ( isset( $errors[0]['message'] ) ) {
$message = $errors[0]['message'];
}
if ( isset( $errors[0]['reason'] ) ) {
$reason = $errors[0]['reason'];
}
} elseif ( $e instanceof Google_Proxy_Code_Exception ) {
$status = 401;
$code = $message;
$auth_client = $this->authentication->get_oauth_client();
$message = $auth_client->get_error_message( $code );
$google_proxy = $this->authentication->get_google_proxy();
$credentials = $this->authentication->credentials()->get();
$params = array(
'code' => $e->getAccessCode(),
'site_id' => ! empty( $credentials['oauth2_client_id'] ) ? $credentials['oauth2_client_id'] : '',
);
$params = $google_proxy->add_setup_step_from_error_code( $params, $code );
$reconnect_url = $google_proxy->setup_url( $params );
}
if ( empty( $code ) ) {
$code = 'unknown';
}
$data = array(
'status' => $status,
'reason' => $reason,
);
if ( ! empty( $reconnect_url ) ) {
$data['reconnectURL'] = $reconnect_url;
}
return new WP_Error( $code, $message, $data );
}
/**
* Parses the string list into an array of strings.
*
* @since 1.15.0
*
* @param string|array $items Items to parse.
* @return array An array of string items.
*/
protected function parse_string_list( $items ) {
if ( is_string( $items ) ) {
$items = explode( ',', $items );
}
if ( ! is_array( $items ) || empty( $items ) ) {
return array();
}
$items = array_map(
function( $item ) {
if ( ! is_string( $item ) ) {
return false;
}
$item = trim( $item );
if ( empty( $item ) ) {
return false;
}
return $item;
},
$items
);
$items = array_filter( $items );
$items = array_values( $items );
return $items;
}
/**
* Determines whether the current module is forced to be active or not.
*
* @since 1.49.0
*
* @return bool TRUE if the module forced to be active, otherwise FALSE.
*/
public static function is_force_active() {
return false;
}
/**
* Checks whether the module is shareable.
*
* @since 1.50.0
*
* @return bool True if module is shareable, false otherwise.
*/
public function is_shareable() {
if ( $this instanceof Module_With_Owner && $this->is_connected() ) {
$datapoints = $this->get_datapoint_definitions();
foreach ( $datapoints as $details ) {
if ( ! empty( $details['shareable'] ) ) {
return true;
}
}
}
return false;
}
}