MediaWiki  1.23.8
ApiQueryRandom.php
Go to the documentation of this file.
1 <?php
2 
34  private $pageIDs;
35 
36  public function __construct( $query, $moduleName ) {
37  parent::__construct( $query, $moduleName, 'rn' );
38  }
39 
40  public function execute() {
41  $this->run();
42  }
43 
44  public function executeGenerator( $resultPageSet ) {
45  $this->run( $resultPageSet );
46  }
47 
56  protected function prepareQuery( $randstr, $limit, $namespace, &$resultPageSet, $redirect ) {
57  $this->resetQueryParams();
58  $this->addTables( 'page' );
59  $this->addOption( 'LIMIT', $limit );
60  $this->addWhereFld( 'page_namespace', $namespace );
61  $this->addWhereRange( 'page_random', 'newer', $randstr, null );
62  $this->addWhereFld( 'page_is_redirect', $redirect );
63  if ( is_null( $resultPageSet ) ) {
64  $this->addFields( array( 'page_id', 'page_title', 'page_namespace' ) );
65  } else {
66  $this->addFields( $resultPageSet->getPageTableFields() );
67  }
68  }
69 
74  protected function runQuery( $resultPageSet = null ) {
75  $res = $this->select( __METHOD__ );
76  $count = 0;
77  foreach ( $res as $row ) {
78  $count++;
79  if ( is_null( $resultPageSet ) ) {
80  // Prevent duplicates
81  if ( !in_array( $row->page_id, $this->pageIDs ) ) {
82  $fit = $this->getResult()->addValue(
83  array( 'query', $this->getModuleName() ),
84  null, $this->extractRowInfo( $row ) );
85  if ( !$fit ) {
86  // We can't really query-continue a random list.
87  // Return an insanely high value so
88  // $count < $limit is false
89  return 1E9;
90  }
91  $this->pageIDs[] = $row->page_id;
92  }
93  } else {
94  $resultPageSet->processDbRow( $row );
95  }
96  }
97 
98  return $count;
99  }
100 
105  public function run( $resultPageSet = null ) {
106  $params = $this->extractRequestParams();
107  $result = $this->getResult();
108  $this->pageIDs = array();
109 
110  $this->prepareQuery(
111  wfRandom(),
112  $params['limit'],
113  $params['namespace'],
114  $resultPageSet,
115  $params['redirect']
116  );
117  $count = $this->runQuery( $resultPageSet );
118  if ( $count < $params['limit'] ) {
119  /* We got too few pages, we probably picked a high value
120  * for page_random. We'll just take the lowest ones, see
121  * also the comment in Title::getRandomTitle()
122  */
123  $this->prepareQuery(
124  0,
125  $params['limit'] - $count,
126  $params['namespace'],
127  $resultPageSet,
128  $params['redirect']
129  );
130  $this->runQuery( $resultPageSet );
131  }
132 
133  if ( is_null( $resultPageSet ) ) {
134  $result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'page' );
135  }
136  }
137 
138  private function extractRowInfo( $row ) {
139  $title = Title::makeTitle( $row->page_namespace, $row->page_title );
140  $vals = array();
141  $vals['id'] = intval( $row->page_id );
143 
144  return $vals;
145  }
146 
147  public function getCacheMode( $params ) {
148  return 'public';
149  }
150 
151  public function getAllowedParams() {
152  return array(
153  'namespace' => array(
154  ApiBase::PARAM_TYPE => 'namespace',
155  ApiBase::PARAM_ISMULTI => true
156  ),
157  'limit' => array(
158  ApiBase::PARAM_TYPE => 'limit',
159  ApiBase::PARAM_DFLT => 1,
160  ApiBase::PARAM_MIN => 1,
161  ApiBase::PARAM_MAX => 10,
162  ApiBase::PARAM_MAX2 => 20
163  ),
164  'redirect' => false,
165  );
166  }
167 
168  public function getParamDescription() {
169  return array(
170  'namespace' => 'Return pages in these namespaces only',
171  'limit' => 'Limit how many random pages will be returned',
172  'redirect' => 'Load a random redirect instead of a random page'
173  );
174  }
175 
176  public function getResultProperties() {
177  return array(
178  '' => array(
179  'id' => 'integer',
180  'ns' => 'namespace',
181  'title' => 'string'
182  )
183  );
184  }
185 
186  public function getDescription() {
187  return array(
188  'Get a set of random pages.',
189  'NOTE: Pages are listed in a fixed sequence, only the starting point is random.',
190  ' This means that if, for example, "Main Page" is the first random page on',
191  ' your list, "List of fictional monkeys" will *always* be second, "List of',
192  ' people on stamps of Vanuatu" third, etc.',
193  'NOTE: If the number of pages in the namespace is lower than rnlimit, you will',
194  ' get fewer pages. You will not get the same page twice.'
195  );
196  }
197 
198  public function getExamples() {
199  return 'api.php?action=query&list=random&rnnamespace=0&rnlimit=2';
200  }
201 
202  public function getHelpUrls() {
203  return 'https://www.mediawiki.org/wiki/API:Random';
204  }
205 }
Title\makeTitle
static & makeTitle( $ns, $title, $fragment='', $interwiki='')
Create a new Title from a namespace index and a DB key.
Definition: Title.php:398
$result
The index of the header message $result[1]=The index of the body text message $result[2 through n]=Parameters passed to body text message. Please note the header message cannot receive/use parameters. 'ImportHandleLogItemXMLTag':When parsing a XML tag in a log item. $reader:XMLReader object $logInfo:Array of information Return false to stop further processing of the tag 'ImportHandlePageXMLTag':When parsing a XML tag in a page. $reader:XMLReader object $pageInfo:Array of information Return false to stop further processing of the tag 'ImportHandleRevisionXMLTag':When parsing a XML tag in a page revision. $reader:XMLReader object $pageInfo:Array of page information $revisionInfo:Array of revision information Return false to stop further processing of the tag 'ImportHandleToplevelXMLTag':When parsing a top level XML tag. $reader:XMLReader object Return false to stop further processing of the tag 'ImportHandleUploadXMLTag':When parsing a XML tag in a file upload. $reader:XMLReader object $revisionInfo:Array of information Return false to stop further processing of the tag 'InfoAction':When building information to display on the action=info page. $context:IContextSource object & $pageInfo:Array of information 'InitializeArticleMaybeRedirect':MediaWiki check to see if title is a redirect. $title:Title object for the current page $request:WebRequest $ignoreRedirect:boolean to skip redirect check $target:Title/string of redirect target $article:Article object 'InterwikiLoadPrefix':When resolving if a given prefix is an interwiki or not. Return true without providing an interwiki to continue interwiki search. $prefix:interwiki prefix we are looking for. & $iwData:output array describing the interwiki with keys iw_url, iw_local, iw_trans and optionally iw_api and iw_wikiid. 'InternalParseBeforeSanitize':during Parser 's internalParse method just before the parser removes unwanted/dangerous HTML tags and after nowiki/noinclude/includeonly/onlyinclude and other processings. Ideal for syntax-extensions after template/parser function execution which respect nowiki and HTML-comments. & $parser:Parser object & $text:string containing partially parsed text & $stripState:Parser 's internal StripState object 'InternalParseBeforeLinks':during Parser 's internalParse method before links but after nowiki/noinclude/includeonly/onlyinclude and other processings. & $parser:Parser object & $text:string containing partially parsed text & $stripState:Parser 's internal StripState object 'InvalidateEmailComplete':Called after a user 's email has been invalidated successfully. $user:user(object) whose email is being invalidated 'IRCLineURL':When constructing the URL to use in an IRC notification. Callee may modify $url and $query, URL will be constructed as $url . $query & $url:URL to index.php & $query:Query string $rc:RecentChange object that triggered url generation 'IsFileCacheable':Override the result of Article::isFileCacheable()(if true) $article:article(object) being checked 'IsTrustedProxy':Override the result of wfIsTrustedProxy() $ip:IP being check $result:Change this value to override the result of wfIsTrustedProxy() 'IsUploadAllowedFromUrl':Override the result of UploadFromUrl::isAllowedUrl() $url:URL used to upload from & $allowed:Boolean indicating if uploading is allowed for given URL 'isValidEmailAddr':Override the result of User::isValidEmailAddr(), for instance to return false if the domain name doesn 't match your organization. $addr:The e-mail address entered by the user & $result:Set this and return false to override the internal checks 'isValidPassword':Override the result of User::isValidPassword() $password:The password entered by the user & $result:Set this and return false to override the internal checks $user:User the password is being validated for 'Language::getMessagesFileName':$code:The language code or the language we 're looking for a messages file for & $file:The messages file path, you can override this to change the location. 'LanguageGetNamespaces':Provide custom ordering for namespaces or remove namespaces. Do not use this hook to add namespaces. Use CanonicalNamespaces for that. & $namespaces:Array of namespaces indexed by their numbers 'LanguageGetMagic':DEPRECATED, use $magicWords in a file listed in $wgExtensionMessagesFiles instead. Use this to define synonyms of magic words depending of the language $magicExtensions:associative array of magic words synonyms $lang:language code(string) 'LanguageGetSpecialPageAliases':DEPRECATED, use $specialPageAliases in a file listed in $wgExtensionMessagesFiles instead. Use to define aliases of special pages names depending of the language $specialPageAliases:associative array of magic words synonyms $lang:language code(string) 'LanguageGetTranslatedLanguageNames':Provide translated language names. & $names:array of language code=> language name $code language of the preferred translations 'LanguageLinks':Manipulate a page 's language links. This is called in various places to allow extensions to define the effective language links for a page. $title:The page 's Title. & $links:Associative array mapping language codes to prefixed links of the form "language:title". & $linkFlags:Associative array mapping prefixed links to arrays of flags. Currently unused, but planned to provide support for marking individual language links in the UI, e.g. for featured articles. 'LinkBegin':Used when generating internal and interwiki links in Linker::link(), before processing starts. Return false to skip default processing and return $ret. See documentation for Linker::link() for details on the expected meanings of parameters. $skin:the Skin object $target:the Title that the link is pointing to & $html:the contents that the< a > tag should have(raw HTML) $result
Definition: hooks.txt:1528
ApiQueryBase\addFields
addFields( $value)
Add a set of fields to select to the internal array.
Definition: ApiQueryBase.php:117
ApiQueryRandom\getHelpUrls
getHelpUrls()
Definition: ApiQueryRandom.php:202
php
skin txt MediaWiki includes four core it has been set as the default in MediaWiki since the replacing Monobook it had been been the default skin since before being replaced by Vector largely rewritten in while keeping its appearance Several legacy skins were removed in the as the burden of supporting them became too heavy to bear Those in etc for skin dependent CSS etc for skin dependent JavaScript These can also be customised on a per user by etc This feature has led to a wide variety of user styles becoming that gallery is a good place to ending in php
Definition: skin.txt:62
ApiQueryBase\resetQueryParams
resetQueryParams()
Blank the internal arrays with query parameters.
Definition: ApiQueryBase.php:68
ApiBase\PARAM_TYPE
const PARAM_TYPE
Definition: ApiBase.php:50
ApiBase\getResult
getResult()
Get the result object.
Definition: ApiBase.php:205
ApiQueryBase\select
select( $method, $extraQuery=array())
Execute a SELECT query based on the values in the internal arrays.
Definition: ApiQueryBase.php:274
ApiQueryRandom\run
run( $resultPageSet=null)
Definition: ApiQueryRandom.php:105
$params
$params
Definition: styleTest.css.php:40
$limit
if( $sleep) $limit
Definition: importImages.php:99
ApiQueryRandom\prepareQuery
prepareQuery( $randstr, $limit, $namespace, &$resultPageSet, $redirect)
Definition: ApiQueryRandom.php:56
ApiQueryRandom\executeGenerator
executeGenerator( $resultPageSet)
Execute this module as a generator.
Definition: ApiQueryRandom.php:44
ApiQueryRandom\runQuery
runQuery( $resultPageSet=null)
Definition: ApiQueryRandom.php:74
ApiQueryBase\addOption
addOption( $name, $value=null)
Add an option such as LIMIT or USE INDEX.
Definition: ApiQueryBase.php:252
ApiQueryRandom\getParamDescription
getParamDescription()
Returns an array of parameter descriptions.
Definition: ApiQueryRandom.php:168
ApiBase\PARAM_MIN
const PARAM_MIN
Definition: ApiBase.php:56
ApiQueryRandom\getAllowedParams
getAllowedParams()
Returns an array of allowed parameters (parameter name) => (default value) or (parameter name) => (ar...
Definition: ApiQueryRandom.php:151
ApiBase\PARAM_MAX
const PARAM_MAX
Definition: ApiBase.php:52
ApiQueryBase\addTables
addTables( $tables, $alias=null)
Add a set of tables to the internal array.
Definition: ApiQueryBase.php:82
array
the array() calling protocol came about after MediaWiki 1.4rc1.
List of Api Query prop modules.
ApiQueryRandom\getDescription
getDescription()
Returns the description string for this module.
Definition: ApiQueryRandom.php:186
ApiQueryBase\addWhereRange
addWhereRange( $field, $dir, $start, $end, $sort=true)
Add a WHERE clause corresponding to a range, and an ORDER BY clause to sort in the right direction.
Definition: ApiQueryBase.php:205
ApiBase\extractRequestParams
extractRequestParams( $parseLimit=true)
Using getAllowedParams(), this function makes an array of the values provided by the user,...
Definition: ApiBase.php:687
$title
presenting them properly to the user as errors is done by the caller $title
Definition: hooks.txt:1324
ApiQueryRandom\getCacheMode
getCacheMode( $params)
Get the cache mode for the data generated by this module.
Definition: ApiQueryRandom.php:147
ApiQueryRandom\extractRowInfo
extractRowInfo( $row)
Definition: ApiQueryRandom.php:138
ApiQueryBase\addWhereFld
addWhereFld( $field, $value)
Equivalent to addWhere(array($field => $value))
Definition: ApiQueryBase.php:185
$count
$count
Definition: UtfNormalTest2.php:96
ApiQueryGeneratorBase
Definition: ApiQueryBase.php:626
wfRandom
wfRandom()
Get a random decimal value between 0 and 1, in a way not likely to give duplicate values for any real...
Definition: GlobalFunctions.php:281
ApiQueryRandom\__construct
__construct( $query, $moduleName)
Definition: ApiQueryRandom.php:36
ApiQueryRandom\$pageIDs
$pageIDs
Definition: ApiQueryRandom.php:34
ApiBase\PARAM_DFLT
const PARAM_DFLT
Definition: ApiBase.php:46
ApiQueryRandom\getExamples
getExamples()
Returns usage examples for this module.
Definition: ApiQueryRandom.php:198
as
This document is intended to provide useful advice for parties seeking to redistribute MediaWiki to end users It s targeted particularly at maintainers for Linux since it s been observed that distribution packages of MediaWiki often break We ve consistently had to recommend that users seeking support use official tarballs instead of their distribution s and this often solves whatever problem the user is having It would be nice if this could such as
Definition: distributors.txt:9
ApiQueryRandom
Query module to get list of random pages.
Definition: ApiQueryRandom.php:33
ApiBase\getModuleName
getModuleName()
Get the name of the module being executed by this instance.
Definition: ApiBase.php:148
ApiBase\PARAM_ISMULTI
const PARAM_ISMULTI
Definition: ApiBase.php:48
ApiBase\PARAM_MAX2
const PARAM_MAX2
Definition: ApiBase.php:54
$query
return true to allow those checks to and false if checking is done use this to change the tables headers temp or archived zone change it to an object instance and return false override the list derivative used the name of the old file when set the default code will be skipped add a value to it if you want to add a cookie that have to vary cache options can modify $query
Definition: hooks.txt:1105
$res
$res
Definition: database.txt:21
ApiQueryRandom\execute
execute()
Evaluates the parameters, performs the requested query, and sets up the result.
Definition: ApiQueryRandom.php:40
ApiQueryBase\addTitleInfo
static addTitleInfo(&$arr, $title, $prefix='')
Add information (title and namespace) about a Title object to a result array.
Definition: ApiQueryBase.php:339
ApiQueryRandom\getResultProperties
getResultProperties()
Returns possible properties in the result, grouped by the value of the prop parameter that shows them...
Definition: ApiQueryRandom.php:176