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<?php
/**
* This file contains the ApiErrorFormatter definition, plus implementations of
* specific formatters.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
namespace MediaWiki\Api;
use MediaWiki\Exception\ILocalizedException;
use MediaWiki\Language\Language;
use MediaWiki\Language\RawMessage;
use MediaWiki\Message\Message;
use MediaWiki\Page\PageReference;
use MediaWiki\Page\PageReferenceValue;
use MediaWiki\Parser\Sanitizer;
use StatusValue;
use Throwable;
use Wikimedia\Message\MessageSpecifier;
/**
* Formats errors and warnings for the API, and add them to the associated
* ApiResult.
* @since 1.25
* @ingroup API
* @phan-file-suppress PhanUndeclaredMethod Undeclared methods in IApiMessage
*/
class ApiErrorFormatter {
/** @var PageReference Dummy title to silence warnings from MessageCache::parse() */
private static $dummyTitle = null;
/** @var ApiResult */
protected $result;
/** @var Language */
protected $lang;
/** @var PageReference|null page used for rendering error messages, or null to use the dummy title */
private $title = null;
/** @var bool */
protected $useDB = false;
/** @var string */
protected $format = 'none';
/**
* @param ApiResult $result Into which data will be added
* @param Language $lang Used for i18n
* @param string $format
* - plaintext: Error message as something vaguely like plaintext
* (it's basically wikitext with HTML tags stripped and entities decoded)
* - wikitext: Error message as wikitext
* - html: Error message as HTML
* - raw: Raw message key and parameters, no human-readable text
* - none: Code and data only, no human-readable text
* @param bool $useDB Whether to use local translations for errors and warnings.
*/
public function __construct( ApiResult $result, Language $lang, $format, $useDB = false ) {
$this->result = $result;
$this->lang = $lang;
$this->useDB = $useDB;
$this->format = $format;
}
/**
* Test whether a code is a valid API error code
*
* A valid code contains only ASCII letters, numbers, underscore, and
* hyphen and is not the empty string.
*
* For backwards compatibility, any code beginning 'internal_api_error_' is
* also allowed.
*
* @param string $code
* @return bool
*/
public static function isValidApiCode( $code ) {
return is_string( $code ) && (
preg_match( '/^[a-zA-Z0-9_-]+$/', $code ) ||
// TODO: Deprecate this
preg_match( '/^internal_api_error_[^\0\r\n]+$/', $code )
);
}
/**
* Return a formatter like this one but with a different format
*
* @since 1.32
* @param string $format New format.
* @return ApiErrorFormatter
*/
public function newWithFormat( $format ) {
return new self( $this->result, $this->lang, $format, $this->useDB );
}
/**
* Fetch the format for this formatter
* @since 1.32
* @return string
*/
public function getFormat() {
return $this->format;
}
/**
* Fetch the Language for this formatter
* @since 1.29
* @return Language
*/
public function getLanguage() {
return $this->lang;
}
/**
* Fetch a dummy title to set on Messages
*/
protected function getDummyTitle(): PageReference {
if ( self::$dummyTitle === null ) {
self::$dummyTitle = PageReferenceValue::localReference(
NS_SPECIAL,
'Badtitle/' . __METHOD__
);
}
return self::$dummyTitle;
}
/**
* Get the page used for rendering error messages, e.g. for wikitext magic words like {{PAGENAME}}
* @since 1.37
* @return PageReference
*/
public function getContextTitle(): PageReference {
return $this->title ?: $this->getDummyTitle();
}
/**
* Set the page used for rendering error messages, e.g. for wikitext magic words like {{PAGENAME}}
* @since 1.37
* @param PageReference $title
*/
public function setContextTitle( PageReference $title ) {
$this->title = $title;
}
/**
* Add a warning to the result
* @param string|null $modulePath
* @param MessageSpecifier|array|string $msg Warning message. See ApiMessage::create().
* @param string|null $code See ApiMessage::create().
* @param array|null $data See ApiMessage::create().
*/
public function addWarning( $modulePath, $msg, $code = null, $data = null ) {
$msg = ApiMessage::create( $msg, $code, $data )
->inLanguage( $this->lang )
->page( $this->getContextTitle() )
->useDatabase( $this->useDB );
$this->addWarningOrError( 'warning', $modulePath, $msg );
}
/**
* Add an error to the result
* @param string|null $modulePath
* @param MessageSpecifier|array|string $msg Warning message. See ApiMessage::create().
* @param string|null $code See ApiMessage::create().
* @param array|null $data See ApiMessage::create().
*/
public function addError( $modulePath, $msg, $code = null, $data = null ) {
$msg = ApiMessage::create( $msg, $code, $data )
->inLanguage( $this->lang )
->page( $this->getContextTitle() )
->useDatabase( $this->useDB );
$this->addWarningOrError( 'error', $modulePath, $msg );
}
/**
* Add warnings and errors from a StatusValue object to the result
* @param string|null $modulePath
* @param StatusValue $status
* @param string[]|string $types 'warning' and/or 'error'
* @param string[] $filter Messages to filter out (since 1.33)
*/
public function addMessagesFromStatus(
$modulePath, StatusValue $status, $types = [ 'warning', 'error' ], array $filter = []
) {
if ( $status->isGood() ) {
return;
}
$types = array_unique( (array)$types );
foreach ( $types as $type ) {
foreach ( $status->getMessages( $type ) as $msg ) {
$msg = ApiMessage::create( $msg )
->inLanguage( $this->lang )
->page( $this->getContextTitle() )
->useDatabase( $this->useDB );
if ( !in_array( $msg->getKey(), $filter, true ) ) {
$this->addWarningOrError( $type, $modulePath, $msg );
}
}
}
}
/**
* Get an ApiMessage from a throwable
* @since 1.29
* @param Throwable $exception
* @param array $options
* - wrap: (string|array|MessageSpecifier) Used to wrap the throwable's
* message if it's not an ILocalizedException. The throwable's message
* will be added as the final parameter.
* - code: (string) Default code
* - data: (array) Default extra data
* @return IApiMessage
*/
public function getMessageFromException( Throwable $exception, array $options = [] ) {
$options += [ 'code' => null, 'data' => [] ];
if ( $exception instanceof ILocalizedException ) {
$msg = $exception->getMessageObject();
$params = [];
} elseif ( $exception instanceof MessageSpecifier ) {
$msg = Message::newFromSpecifier( $exception );
$params = [];
} else {
if ( isset( $options['wrap'] ) ) {
$msg = $options['wrap'];
} else {
$msg = new RawMessage( '$1' );
if ( !isset( $options['code'] ) ) {
$class = preg_replace( '#^Wikimedia\\\\Rdbms\\\\#', '', get_class( $exception ) );
$options['code'] = 'internal_api_error_' . $class;
$options['data']['errorclass'] = get_class( $exception );
}
}
$params = [ wfEscapeWikiText( $exception->getMessage() ) ];
}
return ApiMessage::create( $msg, $options['code'], $options['data'] )
->params( $params )
->inLanguage( $this->lang )
->page( $this->getContextTitle() )
->useDatabase( $this->useDB );
}
/**
* Format a throwable as an array
* @since 1.29
* @param Throwable $exception
* @param array $options See self::getMessageFromException(), plus
* - format: (string) Format override
* @return array
*/
public function formatException( Throwable $exception, array $options = [] ) {
return $this->formatMessage(
// @phan-suppress-next-line PhanTypeMismatchArgument
$this->getMessageFromException( $exception, $options ),
$options['format'] ?? null
);
}
/**
* Format a message as an array
* @param Message|array|string $msg Message. See ApiMessage::create().
* @param string|null $format
* @return array
*/
public function formatMessage( $msg, $format = null ) {
$msg = ApiMessage::create( $msg )
->inLanguage( $this->lang )
->page( $this->getContextTitle() )
->useDatabase( $this->useDB );
return $this->formatMessageInternal( $msg, $format ?: $this->format );
}
/**
* Format messages from a StatusValue as an array
* @param StatusValue $status
* @param string $type 'warning' or 'error'
* @param string|null $format
* @return array
*/
public function arrayFromStatus( StatusValue $status, $type = 'error', $format = null ) {
if ( $status->isGood() || !$status->getMessages() ) {
return [];
}
$result = new ApiResult( 1_000_000 );
$formatter = new ApiErrorFormatter(
$result, $this->lang, $format ?: $this->format, $this->useDB
);
$formatter->addMessagesFromStatus( null, $status, [ $type ] );
switch ( $type ) {
case 'error':
return (array)$result->getResultData( [ 'errors' ] );
case 'warning':
return (array)$result->getResultData( [ 'warnings' ] );
}
}
/**
* Turn wikitext into something resembling plaintext
* @since 1.29
* @param string $text
* @return string
*/
public static function stripMarkup( $text ) {
// Turn semantic quoting tags to quotes
$ret = preg_replace( '!</?(var|kbd|samp|code)>!', '"', $text );
// Strip tags and decode.
return Sanitizer::stripAllTags( $ret );
}
/**
* Format a Message object for raw format
* @param MessageSpecifier $msg
* @return array
*/
private function formatRawMessage( MessageSpecifier $msg ) {
$ret = [
'key' => $msg->getKey(),
'params' => $msg->getParams(),
];
ApiResult::setIndexedTagName( $ret['params'], 'param' );
// Transform Messages as parameters in the style of Message::fooParam().
foreach ( $ret['params'] as $i => $param ) {
if ( $param instanceof MessageSpecifier ) {
$ret['params'][$i] = [ 'message' => $this->formatRawMessage( $param ) ];
}
}
return $ret;
}
/**
* Format a message as an array
* @since 1.29
* @param ApiMessage|ApiRawMessage $msg
* @param string|null $format
* @return array
*/
protected function formatMessageInternal( $msg, $format ) {
$value = [ 'code' => $msg->getApiCode() ];
switch ( $format ) {
case 'plaintext':
$value += [
'text' => self::stripMarkup( $msg->text() ),
ApiResult::META_CONTENT => 'text',
];
break;
case 'wikitext':
$value += [
'text' => $msg->text(),
ApiResult::META_CONTENT => 'text',
];
break;
case 'html':
$value += [
'html' => $msg->parse(),
ApiResult::META_CONTENT => 'html',
];
break;
case 'raw':
$value += $this->formatRawMessage( $msg );
break;
case 'none':
break;
}
$data = $msg->getApiData();
if ( $data ) {
$value['data'] = $msg->getApiData() + [
ApiResult::META_TYPE => 'assoc',
];
}
return $value;
}
/**
* Actually add the warning or error to the result
* @param string $tag 'warning' or 'error'
* @param string|null $modulePath
* @param ApiMessage|ApiRawMessage $msg
*/
protected function addWarningOrError( $tag, $modulePath, $msg ) {
$value = $this->formatMessageInternal( $msg, $this->format );
if ( $modulePath !== null ) {
$value += [ 'module' => $modulePath ];
}
$path = [ $tag . 's' ];
$existing = $this->result->getResultData( $path );
if ( $existing === null || !in_array( $value, $existing ) ) {
$flags = ApiResult::NO_SIZE_CHECK;
if ( $existing === null ) {
$flags |= ApiResult::ADD_ON_TOP;
}
$this->result->addValue( $path, null, $value, $flags );
$this->result->addIndexedTagName( $path, $tag );
}
}
}
/** @deprecated class alias since 1.43 */
class_alias( ApiErrorFormatter::class, 'ApiErrorFormatter' );