mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/PageImages
synced 2024-12-24 05:44:41 +00:00
280 lines
8.5 KiB
PHP
280 lines
8.5 KiB
PHP
<?php
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namespace PageImages;
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use ApiBase;
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use ApiQuery;
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use ApiQueryBase;
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use MediaWiki\MediaWikiServices;
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use MediaWiki\Title\Title;
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use Wikimedia\ParamValidator\ParamValidator;
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use Wikimedia\ParamValidator\TypeDef\IntegerDef;
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/**
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* Expose image information for a page via a new prop=pageimages API.
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*
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* @see https://www.mediawiki.org/wiki/Extension:PageImages#API
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*
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* @license WTFPL
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* @author Max Semenik
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* @author Ryan Kaldari
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* @author Yuvi Panda
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* @author Sam Smith
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*/
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class ApiQueryPageImages extends ApiQueryBase {
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/**
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* @param ApiQuery $query API query module
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* @param string $moduleName Name of this query module
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*/
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public function __construct( ApiQuery $query, $moduleName ) {
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parent::__construct( $query, $moduleName, 'pi' );
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}
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/**
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* Gets the set of titles to get page images for.
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*
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* Note well that the set of titles comprises the set of "good" titles
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* (see {@see ApiPageSet::getGoodTitles}) union the set of "missing"
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* titles in the File namespace that might correspond to foreign files.
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* The latter are included because titles in the File namespace are
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* expected to be found with {@see \RepoGroup::findFile}.
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*
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* @return Title[] A map of page ID, which will be negative in the case
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* of missing titles in the File namespace, to Title object
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*/
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protected function getTitles() {
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$pageSet = $this->getPageSet();
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$titles = $pageSet->getGoodTitles();
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// T98791: We want foreign files to be treated like local files
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// in #execute, so include the set of missing filespace pages,
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// which were initially rejected in ApiPageSet#execute.
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$missingTitles = $pageSet->getMissingTitlesByNamespace();
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$missingFileTitles = $missingTitles[NS_FILE] ?? [];
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// $titles is a map of ID to title object, which is ideal,
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// whereas $missingFileTitles is a map of title text to ID.
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// Do not use array_merge here as it doesn't preserve keys.
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foreach ( $missingFileTitles as $dbkey => $id ) {
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$titles[$id] = Title::makeTitle( NS_FILE, $dbkey );
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}
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return $titles;
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}
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/**
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* Evaluates the parameters, performs the requested retrieval of page images,
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* and sets up the result
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*/
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public function execute() {
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$params = $this->extractRequestParams();
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$prop = array_flip( $params['prop'] );
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if ( !count( $prop ) ) {
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$this->dieWithError(
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[ 'apierror-paramempty', $this->encodeParamName( 'prop' ) ], 'noprop'
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);
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}
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$allTitles = $this->getTitles();
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if ( count( $allTitles ) === 0 ) {
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return;
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}
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// Find the offset based on the continue param
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$offset = 0;
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if ( isset( $params['continue'] ) ) {
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// Get the position (not the key) of the 'continue' page within the
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// array of titles. Set this as the offset.
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$pageIds = array_keys( $allTitles );
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$offset = array_search( intval( $params['continue'] ), $pageIds );
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// If the 'continue' page wasn't found, die with error
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$this->dieContinueUsageIf( !$offset );
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}
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$limit = $params['limit'];
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// Slice the part of the array we want to find images for
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$titles = array_slice( $allTitles, $offset, $limit, true );
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// Get the next item in the title array and use it to set the continue value
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$nextItemArray = array_slice( $allTitles, $offset + $limit, 1, true );
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if ( $nextItemArray ) {
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$this->setContinueEnumParameter( 'continue', key( $nextItemArray ) );
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}
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// Find any titles in the file namespace so we can handle those separately
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$filePageTitles = [];
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foreach ( $titles as $id => $title ) {
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if ( $title->inNamespace( NS_FILE ) ) {
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$filePageTitles[$id] = $title;
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unset( $titles[$id] );
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}
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}
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$size = $params['thumbsize'];
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$lang = $params['langcode'];
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// Extract page images from the page_props table
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if ( count( $titles ) > 0 ) {
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$this->addTables( 'page_props' );
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$this->addFields( [ 'pp_page', 'pp_propname', 'pp_value' ] );
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$this->addWhere( [ 'pp_page' => array_keys( $titles ),
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'pp_propname' => PageImages::getPropNames( $params['license'] ) ] );
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$res = $this->select( __METHOD__ );
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$buffer = [];
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$propNameAny = PageImages::getPropName( false );
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foreach ( $res as $row ) {
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$pageId = $row->pp_page;
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if ( !array_key_exists( $pageId, $buffer ) || $row->pp_propname === $propNameAny ) {
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$buffer[$pageId] = $row;
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}
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}
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foreach ( $buffer as $pageId => $row ) {
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$fileName = $row->pp_value;
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$this->setResultValues( $prop, $pageId, $fileName, $size, $lang );
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}
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// End page props image extraction
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}
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// Extract images from file namespace pages. In this case we just use
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// the file itself rather than searching for a page_image. (Bug 50252)
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foreach ( $filePageTitles as $pageId => $title ) {
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$fileName = $title->getDBkey();
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$this->setResultValues( $prop, $pageId, $fileName, $size, $lang );
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}
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}
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/**
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* Get the cache mode for the data generated by this module
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*
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* @param array $params Ignored parameters
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* @return string Always returns "public"
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*/
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public function getCacheMode( $params ) {
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return 'public';
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}
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/**
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* For a given page, set API return values for thumbnail and pageimage as needed
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*
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* @param array $prop The prop values from the API request
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* @param int $pageId The ID of the page
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* @param string $fileName The name of the file to transform
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* @param int $size The thumbsize value from the API request
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* @param string $lang The language code from the API request
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*/
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protected function setResultValues( array $prop, $pageId, $fileName, $size, $lang ) {
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$vals = [];
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if ( isset( $prop['thumbnail'] ) || isset( $prop['original'] ) ) {
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$file = MediaWikiServices::getInstance()->getRepoGroup()->findFile( $fileName );
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if ( $file ) {
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if ( isset( $prop['thumbnail'] ) ) {
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$thumb = $file->transform( [
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'width' => $size,
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'lang' => $lang
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] );
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if ( $thumb && $thumb->getUrl() ) {
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// You can request a thumb 1000x larger than the original
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// which (in case of bitmap original) will return a Thumb object
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// that will lie about its size but have the original as an image.
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$reportedSize = $thumb->fileIsSource() ? $file : $thumb;
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$vals['thumbnail'] = [
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'source' => wfExpandUrl( $thumb->getUrl(), PROTO_CURRENT ),
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'width' => $reportedSize->getWidth(),
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'height' => $reportedSize->getHeight(),
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];
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}
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}
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if ( isset( $prop['original'] ) ) {
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$originalSize = [
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'width' => $file->getWidth(),
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'height' => $file->getHeight()
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];
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if ( $lang ) {
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$file = $file->transform( [
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'lang' => $lang,
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'width' => $originalSize['width'],
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'height' => $originalSize['height']
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] );
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}
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$original_url = wfExpandUrl( $file->getUrl(), PROTO_CURRENT );
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$vals['original'] = [
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'source' => $original_url,
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'width' => $originalSize['width'],
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'height' => $originalSize['height']
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];
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}
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}
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}
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if ( isset( $prop['name'] ) ) {
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$vals['pageimage'] = $fileName;
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}
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$this->getResult()->addValue( [ 'query', 'pages' ], $pageId, $vals );
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}
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/**
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* Return an array describing all possible parameters to this module
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* @return array
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*/
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public function getAllowedParams() {
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return [
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'prop' => [
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ParamValidator::PARAM_TYPE => [ 'thumbnail', 'name', 'original' ],
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ParamValidator::PARAM_ISMULTI => true,
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ParamValidator::PARAM_DEFAULT => 'thumbnail|name',
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ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
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],
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'thumbsize' => [
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ParamValidator::PARAM_TYPE => 'integer',
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ParamValidator::PARAM_DEFAULT => 50,
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],
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'limit' => [
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ParamValidator::PARAM_DEFAULT => 50,
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ParamValidator::PARAM_TYPE => 'limit',
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IntegerDef::PARAM_MIN => 1,
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IntegerDef::PARAM_MAX => 50,
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IntegerDef::PARAM_MAX2 => 100,
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],
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'license' => [
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ParamValidator::PARAM_TYPE => [ PageImages::LICENSE_FREE, PageImages::LICENSE_ANY ],
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ParamValidator::PARAM_ISMULTI => false,
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ParamValidator::PARAM_DEFAULT => $this->getConfig()->get( 'PageImagesAPIDefaultLicense' ),
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ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
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],
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'continue' => [
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ParamValidator::PARAM_TYPE => 'integer',
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ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
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],
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'langcode' => [
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ParamValidator::PARAM_TYPE => 'string',
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ParamValidator::PARAM_DEFAULT => null
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]
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];
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}
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/**
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* @inheritDoc
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*/
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protected function getExamplesMessages() {
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return [
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'action=query&prop=pageimages&titles=Albert%20Einstein&pithumbsize=100' =>
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'apihelp-query+pageimages-example-1',
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];
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}
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/**
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* @see ApiBase::getHelpUrls()
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* @return string
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*/
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public function getHelpUrls() {
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return "https://www.mediawiki.org/wiki/Special:MyLanguage/Extension:PageImages#API";
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}
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}
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