mediawiki-extensions-Templa.../TemplateDataBlob.php
Timo Tijhof 0a03f37581 Specify "content" and "unbalanced-wikitext" as a valid parameter types
Bug: 51374
Change-Id: I711998193cc542b72213b56046529b53ebb17d73
2013-11-07 19:39:29 +00:00

658 lines
17 KiB
PHP

<?php
/**
* @file
* @ingroup Extensions
*/
/**
* Represents the information about a template,
* coming from the JSON blob in the <templatedata> tags
* on wiki pages.
*
* @class
*/
class TemplateDataBlob {
// Size of MySQL 'blob' field; page_props table where the data is stored uses one.
const MAX_LENGTH = 65535;
/**
* @var stdClass
*/
private $data;
/**
* @var Status: Cache of TemplateDataBlob::parse
*/
private $status;
/**
* Parse and validate passed JSON and create a TemplateDataBlob object.
* Accepts and handles user-provided data.
*
* @param string $json
* @throws MWException
* @return TemplateDataBlob
*/
public static function newFromJSON( $json ) {
$tdb = new self( json_decode( $json ) );
$status = $tdb->parse();
if ( !$status->isOK() ) {
// If data is invalid, replace with the minimal valid blob.
// This is to make sure that, if something forgets to check the status first,
// we don't end up with invalid data in the database.
$tdb->data = new stdClass();
$tdb->data->description = null;
$tdb->data->params = new stdClass();
$tdb->data->sets = array();
}
$tdb->status = $status;
return $tdb;
}
/**
* Parse and validate passed JSON (possibly gzip-compressed) and create a TemplateDataBlob object.
*
* @param string $json
* @return TemplateDataBlob
*/
public static function newFromDatabase( $json ) {
// Handle GZIP compression. \037\213 is the header for GZIP files.
if ( substr( $json, 0, 2 ) === "\037\213" ) {
$json = gzdecode( $json );
}
return self::newFromJSON( $json );
}
/**
* Parse the data, normalise it and validate it.
*
* See spec.templatedata.json for the expected format of the JSON object.
* @return Status
*/
private function parse() {
$data = $this->data;
static $rootKeys = array(
'description',
'params',
'paramOrder',
'sets',
);
static $paramKeys = array(
'label',
'required',
'description',
'deprecated',
'aliases',
'default',
'inherits',
'type',
);
static $types = array(
'content',
'line',
'number',
'string',
'unbalanced-wikitext',
'unknown',
'wiki-page-name',
'wiki-user-name',
);
static $typeCompatMap = array(
'string/line' => 'line',
'string/wiki-page-name' => 'wiki-page-name',
'string/wiki-user-name' => 'wiki-user-name',
);
if ( $data === null ) {
return Status::newFatal( 'templatedata-invalid-parse' );
}
if ( !is_object( $data ) ) {
return Status::newFatal( 'templatedata-invalid-type', 'templatedata', 'object' );
}
foreach ( $data as $key => $value ) {
if ( !in_array( $key, $rootKeys ) ) {
return Status::newFatal( 'templatedata-invalid-unknown', $key );
}
}
// Root.description
if ( isset( $data->description ) ) {
if ( !is_object( $data->description ) && !is_string( $data->description ) ) {
return Status::newFatal( 'templatedata-invalid-type', 'description', 'string|object' );
}
$data->description = self::normaliseInterfaceText( $data->description );
} else {
$data->description = null;
}
// Root.params
if ( !isset( $data->params ) ) {
return Status::newFatal( 'templatedata-invalid-missing', 'params', 'object' );
}
if ( !is_object( $data->params ) ) {
return Status::newFatal( 'templatedata-invalid-type', 'params', 'object' );
}
// Deep clone
// We need this to determine whether a property was originally set
// to decide whether 'inherits' will add it or not.
$unnormalizedParams = unserialize( serialize( $data->params ) );
$paramNames = array();
foreach ( $data->params as $paramName => $paramObj ) {
if ( !is_object( $paramObj ) ) {
return Status::newFatal(
'templatedata-invalid-type',
"params.{$paramName}",
'object'
);
}
foreach ( $paramObj as $key => $value ) {
if ( !in_array( $key, $paramKeys ) ) {
return Status::newFatal(
'templatedata-invalid-unknown',
"params.{$paramName}.{$key}"
);
}
}
// Param.label
if ( isset( $paramObj->label ) ) {
if ( !is_object( $paramObj->label ) && !is_string( $paramObj->label ) ) {
// TODO: Also validate that the keys are valid lang codes and the values strings.
return Status::newFatal(
'templatedata-invalid-type',
"params.{$paramName}.label",
'string|object'
);
}
$paramObj->label = self::normaliseInterfaceText( $paramObj->label );
} else {
$paramObj->label = null;
}
// Param.required
if ( isset( $paramObj->required ) ) {
if ( !is_bool( $paramObj->required ) ) {
return Status::newFatal(
'templatedata-invalid-type',
"params.{$paramName}.required",
'boolean'
);
}
} else {
$paramObj->required = false;
}
// Param.description
if ( isset( $paramObj->description ) ) {
if ( !is_object( $paramObj->description ) && !is_string( $paramObj->description ) ) {
// TODO: Also validate that the keys are valid lang codes and the values strings.
return Status::newFatal(
'templatedata-invalid-type',
"params.{$paramName}.description",
'string|object'
);
}
$paramObj->description = self::normaliseInterfaceText( $paramObj->description );
} else {
$paramObj->description = null;
}
// Param.deprecated
if ( isset( $paramObj->deprecated ) ) {
if ( $paramObj->deprecated !== false && !is_string( $paramObj->deprecated ) ) {
return Status::newFatal(
'templatedata-invalid-type',
"params.{$paramName}.deprecated",
'boolean|string'
);
}
} else {
$paramObj->deprecated = false;
}
// Param.aliases
if ( isset( $paramObj->aliases ) ) {
if ( !is_array( $paramObj->aliases ) ) {
// TODO: Validate the array values.
return Status::newFatal(
'templatedata-invalid-type',
"params.{$paramName}.aliases",
'array'
);
}
} else {
$paramObj->aliases = array();
}
// Param.default
if ( isset( $paramObj->default ) ) {
if ( !is_string( $paramObj->default ) ) {
return Status::newFatal(
'templatedata-invalid-type',
"params.{$paramName}.default",
'string'
);
}
} else {
$paramObj->default = '';
}
// Param.type
if ( isset( $paramObj->type ) ) {
if ( !is_string( $paramObj->type ) ) {
return Status::newFatal(
'templatedata-invalid-type',
"params.{$paramName}.type",
'string'
);
}
// Map deprecated types to newer versions
if ( isset( $typeCompatMap[ $paramObj->type ] ) ) {
$paramObj->type = $typeCompatMap[ $paramObj->type ];
}
if ( !in_array( $paramObj->type, $types ) ) {
return Status::newFatal(
'templatedata-invalid-value',
'params.' . $paramName . '.type'
);
}
} else {
$paramObj->type = 'unknown';
}
$paramNames[] = $paramName;
}
// Param.inherits
// Done afterwards to avoid code duplication
foreach ( $data->params as $paramName => $paramObj ) {
if ( isset( $paramObj->inherits ) ) {
if ( !isset( $data->params->{ $paramObj->inherits } ) ) {
return Status::newFatal(
'templatedata-invalid-missing',
"params.{$paramObj->inherits}"
);
}
$parentParamObj = $data->params->{ $paramObj->inherits };
foreach ( $parentParamObj as $key => $value ) {
if ( !in_array( $key, $paramKeys ) ) {
return Status::newFatal( 'templatedata-invalid-unknown', $key );
}
if ( !isset( $unnormalizedParams->$paramName->$key ) ) {
$paramObj->$key = is_object( $parentParamObj->$key ) ?
clone $parentParamObj->$key :
$parentParamObj->$key;
}
}
unset( $paramObj->inherits );
}
}
// Root.paramOrder
if ( isset( $data->paramOrder ) ) {
if ( !is_array( $data->paramOrder ) ) {
return Status::newFatal( 'templatedata-invalid-type', 'paramOrder', 'array' );
}
if ( !count( $data->paramOrder ) ) {
return Status::newFatal( 'templatedata-invalid-empty-array', "paramOrder" );
}
if ( count( $data->paramOrder ) < count( $paramNames ) ) {
$i = count( $data->paramOrder );
return Status::newFatal( 'templatedata-invalid-missing', "paramOrder[$i]" );
}
// Validate each of the values corresponds to a parameter and that there are no
// duplicates
$seen = array();
foreach ( $data->paramOrder as $i => $param ) {
if ( !isset( $data->params->$param ) ) {
return Status::newFatal( 'templatedata-invalid-value', "paramOrder[$i]" );
}
if ( isset( $seen[$param] ) ) {
return Status::newFatal(
'templatedata-invalid-duplicate-value',
"paramOrder[$i]",
"paramOrder[{$seen[$param]}]",
$param
);
}
$seen[$param] = $i;
}
} elseif ( count( $paramNames ) ) {
$data->paramOrder = $paramNames;
}
// Root.sets
if ( isset( $data->sets ) ) {
if ( !is_array( $data->sets ) ) {
return Status::newFatal( 'templatedata-invalid-type', 'sets', 'array' );
}
} else {
$data->sets = array();
}
foreach ( $data->sets as $setNr => $setObj ) {
if ( !is_object( $setObj ) ) {
return Status::newFatal( 'templatedata-invalid-value', "sets.{$setNr}" );
}
if ( !isset( $setObj->label ) ) {
return Status::newFatal(
'templatedata-invalid-missing',
"sets.{$setNr}.label",
'string|object'
);
}
if ( !is_object( $setObj->label ) && !is_string( $setObj->label ) ) {
// TODO: Also validate that the keys are valid lang codes and the values strings.
return Status::newFatal(
'templatedata-invalid-type',
"sets.{$setNr}.label",
'string|object'
);
}
$setObj->label = self::normaliseInterfaceText( $setObj->label );
if ( !isset( $setObj->params ) ) {
return Status::newFatal( 'templatedata-invalid-missing', "sets.{$setNr}.params", 'array' );
}
if ( !is_array( $setObj->params ) ) {
return Status::newFatal( 'templatedata-invalid-type', "sets.{$setNr}.params", 'array' );
}
if ( !count( $setObj->params ) ) {
return Status::newFatal( 'templatedata-invalid-empty-array', "sets.{$setNr}.params" );
}
foreach ( $setObj->params as $i => $param ) {
if ( !isset( $data->params->$param ) ) {
return Status::newFatal( 'templatedata-invalid-value', "sets.{$setNr}.params[$i]" );
}
}
}
$length = strlen( $this->getJSONForDatabase() );
if ( $length > self::MAX_LENGTH ) {
return Status::newFatal( 'templatedata-invalid-length', $length, self::MAX_LENGTH );
}
return Status::newGood();
}
/**
* Normalise a InterfaceText field in the TemplateData blob.
* @return stdClass|string $text
*/
protected static function normaliseInterfaceText( $text ) {
if ( is_string( $text ) ) {
global $wgContLang;
$ret = new stdClass();
$ret->{ $wgContLang->getCode() } = $text;
return $ret;
}
return $text;
}
/**
* Get a single localized string from an InterfaceText object.
*
* Uses the preferred language passed to this function, or one of its fallbacks,
* or the site content language, or its fallbacks.
*
* @param stdClass $text An InterfaceText object
* @param string $langCode Preferred language
* @return null|string Text value from the InterfaceText object or null if no suitable
* match was found
*/
protected static function getInterfaceTextInLanguage( stdClass $text, $langCode ) {
if ( isset( $text->$langCode ) ) {
return $text->$langCode;
}
list( $userlangs, $sitelangs ) = Language::getFallbacksIncludingSiteLanguage( $langCode );
foreach ( $userlangs as $lang ) {
if ( isset( $text->$lang ) ) {
return $text->$lang;
}
}
foreach ( $sitelangs as $lang ) {
if ( isset( $text->$lang ) ) {
return $text->$lang;
}
}
// If none of the languages are found fallback to null. Alternatively we could fallback to
// reset( $text ) which will return whatever key there is, but we should't give the user a
// "random" language with no context (e.g. could be RTL/Hebrew for an LTR/Japanese user).
return null;
}
/**
* @return Status
*/
public function getStatus() {
return $this->status;
}
/**
* @return object
*/
public function getData() {
// TODO: Returned by reference. Data is a private member. Use clone instead?
return $this->data;
}
/**
* Get data with all InterfaceText objects resolved to a single string to the
* appropriate language.
*
* @param string $langCode Preferred language
* @return object
*/
public function getDataInLanguage( $langCode ) {
// Deep clone, also need to clone ->params and all interfacetext objects
// within param properties.
$data = unserialize( serialize( $this->data ) );
// Root.description
if ( $data->description !== null ) {
$data->description = self::getInterfaceTextInLanguage( $data->description, $langCode );
}
foreach ( $data->params as $paramObj ) {
// Param.label
if ( $paramObj->label !== null ) {
$paramObj->label = self::getInterfaceTextInLanguage( $paramObj->label, $langCode );
}
// Param.description
if ( $paramObj->description !== null ) {
$paramObj->description = self::getInterfaceTextInLanguage( $paramObj->description, $langCode );
}
}
foreach ( $data->sets as $setObj ) {
$label = self::getInterfaceTextInLanguage( $setObj->label, $langCode );
if ( $label === null ) {
// Contrary to other InterfaceTexts, set label is not optional. If we're here it
// means the template data from the wiki doesn't contain either the user language,
// site language or any of its fallbacks. Wikis should fix data that is in this
// condition (TODO: Disallow during saving?). For now, fallback to whatever we can
// get that does exist in the text object.
$label = reset( $setObj->label );
}
$setObj->label = $label;
}
return $data;
}
/**
* @return string JSON
*/
public function getJSON() {
return json_encode( $this->data );
}
/**
* @return string JSON, gzip-compressed
*/
public function getJSONForDatabase() {
return gzencode( $this->getJSON() );
}
public function getHtml( Language $lang ) {
$data = $this->getDataInLanguage( $lang->getCode() );
$html =
Html::openElement( 'div', array( 'class' => 'mw-templatedata-doc-wrap' ) )
. Html::element(
'p',
array(
'class' => array(
'mw-templatedata-doc-desc',
'mw-templatedata-doc-muted' => $data->description === null,
)
),
$data->description !== null ?
$data->description :
wfMessage( 'templatedata-doc-desc-empty' )->inLanguage( $lang )->text()
)
. '<table class="wikitable mw-templatedata-doc-params">'
. Html::element(
'caption',
array(),
wfMessage( 'templatedata-doc-params' )->inLanguage( $lang )->text()
)
. '<thead><tr>'
. Html::element(
'th',
array( 'colspan' => 2 ),
wfMessage( 'templatedata-doc-param-name' )->inLanguage( $lang )->text()
)
. Html::element(
'th',
array(),
wfMessage( 'templatedata-doc-param-desc' )->inLanguage( $lang )->text()
)
. Html::element(
'th',
array(),
wfMessage( 'templatedata-doc-param-type' )->inLanguage( $lang )->text()
)
. Html::element(
'th',
array(),
wfMessage( 'templatedata-doc-param-default' )->inLanguage( $lang )->text()
)
. Html::element(
'th',
array(),
wfMessage( 'templatedata-doc-param-status' )->inLanguage( $lang )->text()
)
. '</tr></thead>'
. '<tbody>';
foreach ( $data->params as $paramName => $paramObj ) {
$description = '';
$default = '';
$aliases = '';
if ( count( $paramObj->aliases ) ) {
foreach ( $paramObj->aliases as $alias ) {
$aliases .= Html::element( 'tt', array(
'class' => 'mw-templatedata-doc-param-alias'
), $alias );
}
}
$html .= '<tr>'
// Label
. Html::element( 'th', array(),
$paramObj->label !== null ?
$paramObj->label :
ucfirst( $paramName )
)
// Parameters and aliases
. Html::rawElement( 'td', array( 'class' => 'mw-templatedata-doc-param-name' ),
Html::element( 'tt', array(), $paramName ) . $aliases
)
// Description
. Html::element( 'td', array(
'class' => array(
'mw-templatedata-doc-muted' => (
$paramObj->description === null && $paramObj->deprecated === false
)
)
),
$paramObj->description !== null ?
$paramObj->description :
wfMessage( 'templatedata-doc-param-desc-empty' )->inLanguage( $lang )->text()
)
// Type
. Html::rawElement( 'td', array(
'class' => array(
'mw-templatedata-doc-param-type',
'mw-templatedata-doc-muted' => $paramObj->type === 'unknown'
)
),
Html::element( 'tt', array(), $paramObj->type )
)
// Default
. Html::element( 'td', array(
'class' => array(
'mw-templatedata-doc-muted' => $paramObj->default === ''
)
),
$paramObj->default !== '' ?
$paramObj->default :
wfMessage( 'templatedata-doc-param-default-empty' )->inLanguage( $lang )->text()
)
// Status
. Html::element( 'td', array(),
$paramObj->deprecated ?
wfMessage( 'templatedata-doc-param-status-deprecated' )
->inLanguage( $lang )->text() :
( $paramObj->required ?
wfMessage( 'templatedata-doc-param-status-required' )
->inLanguage( $lang )->text() :
wfMessage( 'templatedata-doc-param-status-optional' )
->inLanguage( $lang )->text()
)
)
. '</tr>';
}
$html .= '</tbody></table>'
. Html::closeElement( 'div' );
return $html;
}
private function __construct( $data = null ) {
$this->data = $data;
}
}