includes/api/ApiQueryTags.php

   1 <?php
   2 /**
   3  *
   4  *
   5  * Created on Jul 9, 2009
   6  *
   7  * Copyright © 2009
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  */
  26
  27 /**
  28  * Query module to enumerate change tags.
  29  *
  30  * @ingroup API
  31  */
  32 class ApiQueryTags extends ApiQueryBase {
  33
  34         public function __construct( ApiQuery $query, $moduleName ) {
  35                 parent::__construct( $query, $moduleName, 'tg' );
  36         }
  37
  38         public function execute() {
  39                 $params = $this->extractRequestParams();
  40
  41                 $prop = array_flip( $params['prop'] );
  42
  43                 $fld_displayname = isset( $prop['displayname'] );
  44                 $fld_description = isset( $prop['description'] );
  45                 $fld_hitcount = isset( $prop['hitcount'] );
  46                 $fld_defined = isset( $prop['defined'] );
  47                 $fld_source = isset( $prop['source'] );
  48                 $fld_active = isset( $prop['active'] );
  49
  50                 $limit = $params['limit'];
  51                 $result = $this->getResult();
  52
  53                 $extensionDefinedTags = array_fill_keys( ChangeTags::listExtensionDefinedTags(), 0 );
  54                 $explicitlyDefinedTags = array_fill_keys( ChangeTags::listExplicitlyDefinedTags(), 0 );
  55                 $extensionActivatedTags = array_fill_keys( ChangeTags::listExtensionActivatedTags(), 0 );
  56
  57                 $definedTags = array_merge( $extensionDefinedTags, $explicitlyDefinedTags );
  58
  59                 # Fetch defined tags that aren't past the continuation
  60                 if ( $params['continue'] !== null ) {
  61                         $cont = $params['continue'];
  62                         $tags = array_filter( array_keys( $definedTags ), function ( $v ) use ( $cont ) {
  63                                 return $v >= $cont;
  64                         } );
  65                         $tags = array_fill_keys( $tags, 0 );
  66                 } else {
  67                         $tags = $definedTags;
  68                 }
  69
  70                 # Merge in all used tags
  71                 $this->addTables( 'change_tag' );
  72                 $this->addFields( 'ct_tag' );
  73                 $this->addFields( array( 'hitcount' => $fld_hitcount ? 'COUNT(*)' : '0' ) );
  74                 $this->addOption( 'LIMIT', $limit + 1 );
  75                 $this->addOption( 'GROUP BY', 'ct_tag' );
  76                 $this->addWhereRange( 'ct_tag', 'newer', $params['continue'], null );
  77                 $res = $this->select( __METHOD__ );
  78                 foreach ( $res as $row ) {
  79                         $tags[$row->ct_tag] = (int)$row->hitcount;
  80                 }
  81
  82                 # Now make sure the array is sorted for proper continuation
  83                 ksort( $tags );
  84
  85                 $count = 0;
  86                 foreach ( $tags as $tagName => $hitcount ) {
  87                         if ( ++$count > $limit ) {
  88                                 $this->setContinueEnumParameter( 'continue', $tagName );
  89                                 break;
  90                         }
  91
  92                         $tag = array();
  93                         $tag['name'] = $tagName;
  94
  95                         if ( $fld_displayname ) {
  96                                 $tag['displayname'] = ChangeTags::tagDescription( $tagName );
  97                         }
  98
  99                         if ( $fld_description ) {
 100                                 $msg = $this->msg( "tag-$tagName-description" );
 101                                 $tag['description'] = $msg->exists() ? $msg->text() : '';
 102                         }
 103
 104                         if ( $fld_hitcount ) {
 105                                 $tag['hitcount'] = $hitcount;
 106                         }
 107
 108                         $isExtension = isset( $extensionDefinedTags[$tagName] );
 109                         $isExplicit = isset( $explicitlyDefinedTags[$tagName] );
 110
 111                         if ( $fld_defined ) {
 112                                 $tag['defined'] = $isExtension || $isExplicit;
 113                         }
 114
 115                         if ( $fld_source ) {
 116                                 $tag['source'] = array();
 117                                 if ( $isExtension ) {
 118                                         $tag['source'][] = 'extension';
 119                                 }
 120                                 if ( $isExplicit ) {
 121                                         $tag['source'][] = 'manual';
 122                                 }
 123                         }
 124
 125                         if ( $fld_active ) {
 126                                 $tag['active'] = $isExplicit || isset( $extensionActivatedTags[$tagName] );
 127                         }
 128
 129                         $fit = $result->addValue( array( 'query', $this->getModuleName() ), null, $tag );
 130                         if ( !$fit ) {
 131                                 $this->setContinueEnumParameter( 'continue', $tagName );
 132                                 break;
 133                         }
 134                 }
 135
 136                 $result->addIndexedTagName( array( 'query', $this->getModuleName() ), 'tag' );
 137         }
 138
 139         public function getCacheMode( $params ) {
 140                 return 'public';
 141         }
 142
 143         public function getAllowedParams() {
 144                 return array(
 145                         'continue' => array(
 146                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
 147                         ),
 148                         'limit' => array(
 149                                 ApiBase::PARAM_DFLT => 10,
 150                                 ApiBase::PARAM_TYPE => 'limit',
 151                                 ApiBase::PARAM_MIN => 1,
 152                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 153                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 154                         ),
 155                         'prop' => array(
 156                                 ApiBase::PARAM_DFLT => 'name',
 157                                 ApiBase::PARAM_TYPE => array(
 158                                         'name',
 159                                         'displayname',
 160                                         'description',
 161                                         'hitcount',
 162                                         'defined',
 163                                         'source',
 164                                         'active',
 165                                 ),
 166                                 ApiBase::PARAM_ISMULTI => true,
 167                                 ApiBase::PARAM_HELP_MSG_PER_VALUE => array(),
 168                         )
 169                 );
 170         }
 171
 172         protected function getExamplesMessages() {
 173                 return array(
 174                         'action=query&list=tags&tgprop=displayname|description|hitcount|defined'
 175                                 => 'apihelp-query+tags-example-simple',
 176                 );
 177         }
 178
 179         public function getHelpUrls() {
 180                 return 'https://www.mediawiki.org/wiki/API:Tags';
 181         }
 182 }