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<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
/**
* WPCOM_JSON_API_Links class.
*
* @package automattic/jetpack
*/
require_once __DIR__ . '/../class.json-api.php';
/**
* Base class for WPCOM_JSON_API_Links.
*/
class WPCOM_JSON_API_Links {
/**
* An instance of the WPCOM_JSON_API.
*
* @var WPCOM_JSON_API
*/
private $api;
/**
* A WPCOM_JSON_API_Links instance.
*
* @var WPCOM_JSON_API_Links
*/
private static $instance;
/**
* An array of the closest supported version of an endpoint to the current endpoint.
*
* @var array
*/
private $closest_endpoint_cache_by_version = array();
/**
* An array including the current api endpoint as well as the max versions found if that endpoint doesn't exist.
*
* @var array
*/
private $matches_by_version = array();
/**
* An array including the cached endpoint path versions.
*
* @var array
*/
private $cache_result = null;
/**
* Creates a new instance of the WPCOM_JSON_API_Links class.
*
* @return WPCOM_JSON_API_Links
*/
public static function getInstance() { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.MethodNameInvalid
if ( null === self::$instance ) {
self::$instance = new self();
}
return self::$instance;
}
/**
* WPCOM_JSON_API_Links constructor.
*
* Method protected for singleton.
*/
protected function __construct() {
$this->api = WPCOM_JSON_API::init();
}
/**
* An empty, private __clone method to prohibit cloning of this instance.
*/
private function __clone() { }
/**
* Overriding PHP's default __wakeup method to prvent unserializing of the instance, and return an error message.
*/
public function __wakeup() {
die( "Please don't __wakeup WPCOM_JSON_API_Links" );
}
/**
* Generate a URL to an endpoint
*
* Used to construct meta links in API responses
*
* @param mixed ...$args Optional arguments to be appended to URL.
* @return string Endpoint URL
**/
public function get_link( ...$args ) {
$format = array_shift( $args );
$base = WPCOM_JSON_API__BASE;
$path = array_pop( $args );
if ( $path ) {
$path = '/' . ltrim( $path, '/' );
// tack the path onto the end of the format string.
// have to escape %'s in the path as %% because
// we're about to pass it through sprintf and we don't
// want it to see the % as a placeholder.
$format .= str_replace( '%', '%%', $path );
}
// Escape any % in args before using sprintf.
$escaped_args = array();
foreach ( $args as $arg_key => $arg_value ) {
$escaped_args[ $arg_key ] = str_replace( '%', '%%', $arg_value );
}
$relative_path = vsprintf( $format, $escaped_args );
if ( ! wp_startswith( $relative_path, '.' ) ) {
// Generic version. Match the requested version as best we can.
$api_version = $this->get_closest_version_of_endpoint( $format, $relative_path );
$base = substr( $base, 0, - 1 ) . $api_version;
}
// escape any % in the relative path before running it through sprintf again.
$relative_path = str_replace( '%', '%%', $relative_path );
// http, WPCOM_JSON_API__BASE, ... , path.
// %s , %s , $format, %s.
return esc_url_raw( sprintf( "https://%s$relative_path", $base ) );
}
/**
* Generate the /me prefixed endpoint URL
*
* Used to construct meta links in API responses, specific to WordPress.com user account pages.
*
* @param string $path Optional path to be appended to the URL.
* @return string /me endpoint URL
**/
public function get_me_link( $path = '' ) {
return $this->get_link( '/me', $path );
}
/**
* Generate the endpoint URL for taxonomies
*
* Used to construct meta links in API responses, specific to taxonomies.
*
* @param int $blog_id The site's Jetpack blog ID.
* @param int $taxonomy_id The taxonomy ID (for example of the category, tag).
* @param string $taxonomy_type The taxonomy type (for example category, tag).
* @param string $path Optional path to be appended to the URL.
* @return string Endpoint URL including taxonomy information.
**/
public function get_taxonomy_link( $blog_id, $taxonomy_id, $taxonomy_type, $path = '' ) {
switch ( $taxonomy_type ) {
case 'category':
return $this->get_link( '/sites/%d/categories/slug:%s', $blog_id, $taxonomy_id, $path );
case 'post_tag':
return $this->get_link( '/sites/%d/tags/slug:%s', $blog_id, $taxonomy_id, $path );
default:
return $this->get_link( '/sites/%d/taxonomies/%s/terms/slug:%s', $blog_id, $taxonomy_type, $taxonomy_id, $path );
}
}
/**
* Generate the endpoint URL for media links
*
* Used to construct meta links in API responses, specific to media links.
*
* @param int $blog_id The site's Jetpack blog ID.
* @param int $media_id The media item ID.
* @param string $path Optional path to be appended to the URL.
* @return string Endpoint URL including media information.
**/
public function get_media_link( $blog_id, $media_id, $path = '' ) {
return $this->get_link( '/sites/%d/media/%d', $blog_id, $media_id, $path );
}
/**
* Generate the site link endpoint URL
*
* Used to construct meta links in API responses, specific to /site links.
*
* @param int $blog_id The site's Jetpack blog ID.
* @param string $path Optional path to be appended to the URL.
* @return string Endpoint URL including site information.
**/
public function get_site_link( $blog_id, $path = '' ) {
return $this->get_link( '/sites/%d', $blog_id, $path );
}
/**
* Generate the posts endpoint URL
*
* Used to construct meta links in API responses, specific to posts links.
*
* @param int $blog_id The site's Jetpack blog ID.
* @param int $post_id The post ID.
* @param string $path Optional path to be appended to the URL.
* @return string Endpoint URL including post information.
**/
public function get_post_link( $blog_id, $post_id, $path = '' ) {
return $this->get_link( '/sites/%d/posts/%d', $blog_id, $post_id, $path );
}
/**
* Generate the comments endpoint URL
*
* Used to construct meta links in API responses, specific to comments links.
*
* @param int $blog_id The site's Jetpack blog ID.
* @param int $comment_id The comment ID.
* @param string $path Optional path to be appended to the URL.
* @return string Endpoint URL including comment information.
**/
public function get_comment_link( $blog_id, $comment_id, $path = '' ) {
return $this->get_link( '/sites/%d/comments/%d', $blog_id, $comment_id, $path );
}
/**
* Generate the endpoint URL for Publicize connections
*
* Used to construct meta links in API responses, specific to Publicize connections.
*
* @param int $blog_id The site's Jetpack blog ID.
* @param int $publicize_connection_id The ID of the Publicize connection.
* @param string $path Optional path to be appended to the URL.
* @return string Endpoint URL including Publicize connection information.
**/
public function get_publicize_connection_link( $blog_id, $publicize_connection_id, $path = '' ) {
return $this->get_link( '.1/sites/%d/publicize-connections/%d', $blog_id, $publicize_connection_id, $path );
}
/**
* Generate the endpoint URL for a single Publicize connection including a Keyring connection
*
* Used to construct meta links in API responses, specific to a single Publicize and Keyring connection.
*
* @param int $keyring_token_id The ID of the Keyring connection.
* @param string $path Optional path to be appended to the URL.
* @return string Endpoint URL including specific Keyring connection information for a specific Publicize connection.
**/
public function get_publicize_connections_link( $keyring_token_id, $path = '' ) {
return $this->get_link( '.1/me/publicize-connections/?keyring_connection_ID=%d', $keyring_token_id, $path );
}
/**
* Generate the endpoint URL for a single Keyring connection
*
* Used to construct meta links in API responses, specific to a Keyring connections.
*
* @param int $keyring_token_id The ID of the Keyring connection.
* @param string $path Optional path to be appended to the URL.
* @return string Endpoint URL including specific Keyring connection.
**/
public function get_keyring_connection_link( $keyring_token_id, $path = '' ) {
return $this->get_link( '.1/me/keyring-connections/%d', $keyring_token_id, $path );
}
/**
* Generate the endpoint URL for an external service that can be integrated with via Keyring
*
* Used to construct meta links in API responses, specific to an external service.
*
* @param int $external_service The ID of the external service.
* @param string $path Optional path to be appended to the URL.
* @return string Endpoint URL including information about an external service that WordPress.com or Jetpack sites can integrate with via keyring.
**/
public function get_external_service_link( $external_service, $path = '' ) {
return $this->get_link( '.1/meta/external-services/%s', $external_service, $path );
}
/**
* Try to find the closest supported version of an endpoint to the current endpoint
*
* For example, if we were looking at the path /animals/panda:
* - if the current endpoint is v1.3 and there is a v1.3 of /animals/%s available, we return 1.3
* - if the current endpoint is v1.3 and there is no v1.3 of /animals/%s known, we fall back to the
* maximum available version of /animals/%s, e.g. 1.1
*
* This method is used in get_link() to construct meta links for API responses.
*
* @param string $template_path The generic endpoint path, e.g. /sites/%s .
* @param string $path The current endpoint path, relative to the version, e.g. /sites/12345 .
* @param string $request_method Request method used to access the endpoint path .
* @return string The current version, or otherwise the maximum version available
*/
public function get_closest_version_of_endpoint( $template_path, $path, $request_method = 'GET' ) {
$closest_endpoint_cache_by_version = & $this->closest_endpoint_cache_by_version;
$closest_endpoint_cache = & $closest_endpoint_cache_by_version[ $this->api->version ];
if ( ! $closest_endpoint_cache ) {
$closest_endpoint_cache_by_version[ $this->api->version ] = array();
$closest_endpoint_cache = & $closest_endpoint_cache_by_version[ $this->api->version ];
}
if ( ! isset( $closest_endpoint_cache[ $template_path ] ) ) {
$closest_endpoint_cache[ $template_path ] = array();
} elseif ( isset( $closest_endpoint_cache[ $template_path ][ $request_method ] ) ) {
return $closest_endpoint_cache[ $template_path ][ $request_method ];
}
$path = untrailingslashit( $path );
// /help is a special case - always use the current request version
if ( wp_endswith( $path, '/help' ) ) {
$closest_endpoint_cache[ $template_path ][ $request_method ] = $this->api->version;
return $this->api->version;
}
$matches_by_version = & $this->matches_by_version;
// try to match out of saved matches.
if ( ! isset( $matches_by_version[ $this->api->version ] ) ) {
$matches_by_version[ $this->api->version ] = array();
}
foreach ( $matches_by_version[ $this->api->version ] as $match ) {
$regex = $match->regex;
if ( preg_match( "#^$regex\$#", $path ) ) {
$closest_endpoint_cache[ $template_path ][ $request_method ] = $match->version;
return $match->version;
}
}
$endpoint_path_versions = $this->get_endpoint_path_versions();
$last_path_segment = $this->get_last_segment_of_relative_path( $path );
$max_version_found = null;
foreach ( $endpoint_path_versions as $endpoint_last_path_segment => $endpoints ) {
// Does the last part of the path match the path key? (e.g. 'posts')
// If the last part contains a placeholder (e.g. %s), we want to carry on.
// phpcs:ignore Universal.Operators.StrictComparisons.LooseNotEqual
if ( $last_path_segment != $endpoint_last_path_segment && ! strstr( $endpoint_last_path_segment, '%' ) ) {
continue;
}
foreach ( $endpoints as $endpoint ) {
// Does the request method match?
if ( ! in_array( $request_method, $endpoint['request_methods'], true ) ) {
continue;
}
$endpoint_path = untrailingslashit( $endpoint['path'] );
$endpoint_path_regex = str_replace( array( '%s', '%d' ), array( '([^/?&]+)', '(\d+)' ), $endpoint_path );
if ( ! preg_match( "#^$endpoint_path_regex\$#", $path ) ) {
continue;
}
// Make sure the endpoint exists at the same version.
if ( null !== $this->api->version &&
version_compare( $this->api->version, $endpoint['min_version'], '>=' ) &&
version_compare( $this->api->version, $endpoint['max_version'], '<=' )
) {
array_push(
$matches_by_version[ $this->api->version ],
(object) array(
'version' => $this->api->version,
'regex' => $endpoint_path_regex,
)
);
$closest_endpoint_cache[ $template_path ][ $request_method ] = $this->api->version;
return $this->api->version;
}
// If the endpoint doesn't exist at the same version, record the max version we found.
if ( empty( $max_version_found ) || version_compare( $max_version_found['version'], $endpoint['max_version'], '<' ) ) {
$max_version_found = array(
'version' => $endpoint['max_version'],
'regex' => $endpoint_path_regex,
);
}
}
}
// If the endpoint version is less than the requested endpoint version, return the max version found.
if ( ! empty( $max_version_found ) ) {
array_push(
$matches_by_version[ $this->api->version ],
(object) $max_version_found
);
$closest_endpoint_cache[ $template_path ][ $request_method ] = $max_version_found['version'];
return $max_version_found['version'];
}
// Otherwise, use the API version of the current request.
return $this->api->version;
}
/**
* Get an array of endpoint paths with their associated versions
*
* @return array Array of endpoint paths, min_versions and max_versions, keyed by last segment of path
**/
protected function get_endpoint_path_versions() {
if ( ! empty( $this->cache_result ) ) {
return $this->cache_result;
}
/*
* Create a map of endpoints and their min/max versions keyed by the last segment of the path (e.g. 'posts')
* This reduces the search space when finding endpoint matches in get_closest_version_of_endpoint()
*/
$endpoint_path_versions = array();
foreach ( $this->api->endpoints as $key => $endpoint_objects ) {
// @todo As with the todo in class.json-api.php, we need to determine if anything depends on this being serialized and hence unserialized, rather than e.g. JSON.
// The key contains a serialized path, min_version and max_version.
list( $path, $min_version, $max_version ) = unserialize( $key ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.serialize_unserialize -- Legacy, see serialization at class.json-api.php.
// Grab the last component of the relative path to use as the top-level key.
$last_path_segment = $this->get_last_segment_of_relative_path( $path );
$endpoint_path_versions[ $last_path_segment ][] = array(
'path' => $path,
'min_version' => $min_version,
'max_version' => $max_version,
'request_methods' => array_keys( $endpoint_objects ),
);
}
$this->cache_result = $endpoint_path_versions;
return $endpoint_path_versions;
}
/**
* Grab the last segment of a relative path
*
* @param string $path Path.
* @return string Last path segment
*/
protected function get_last_segment_of_relative_path( $path ) {
$path_parts = array_filter( explode( '/', $path ) );
if ( empty( $path_parts ) ) {
return null;
}
return end( $path_parts );
}
}
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