Refactor redundant attrib dropping into new method
[lhc/web/wiklou.git] / includes / api / ApiQueryRecentChanges.php
index a25a4e0..5f7ac53 100644 (file)
@@ -1,12 +1,11 @@
 <?php
 
-
 /*
  * Created on Oct 19, 2006
  *
  * API for MediaWiki 1.8+
  *
- * Copyright (C) 2006 Yuri Astrakhan <FirstnameLastname@gmail.com>
+ * Copyright (C) 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
  *
  * 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
@@ -29,85 +28,356 @@ if (!defined('MEDIAWIKI')) {
        require_once ('ApiQueryBase.php');
 }
 
+/**
+ * A query action to enumerate the recent changes that were done to the wiki.
+ * Various filters are supported.
+ *
+ * @ingroup API
+ */
 class ApiQueryRecentChanges extends ApiQueryBase {
 
        public function __construct($query, $moduleName) {
                parent :: __construct($query, $moduleName, 'rc');
        }
 
+       private $fld_comment = false, $fld_user = false, $fld_flags = false,
+                       $fld_timestamp = false, $fld_title = false, $fld_ids = false,
+                       $fld_sizes = false;
+       /**
+        * Get an array mapping token names to their handler functions.
+        * The prototype for a token function is func($pageid, $title, $rc)
+        * it should return a token or false (permission denied)
+        * @return array(tokenname => function)
+        */
+       protected function getTokenFunctions() {
+               // Don't call the hooks twice
+               if(isset($this->tokenFunctions))
+                       return $this->tokenFunctions;
+
+               // If we're in JSON callback mode, no tokens can be obtained
+               if(!is_null($this->getMain()->getRequest()->getVal('callback')))
+                       return array();
+
+               $this->tokenFunctions = array(
+                       'patrol' => array( 'ApiQueryRecentChanges', 'getPatrolToken' )
+               );
+               wfRunHooks('APIQueryRecentChangesTokens', array(&$this->tokenFunctions));
+               return $this->tokenFunctions;
+       }
+       
+       public static function getPatrolToken($pageid, $title, $rc)
+       {
+               global $wgUser;
+               if(!$wgUser->useRCPatrol() && (!$wgUser->useNPPatrol() ||
+                                $rc->getAttribute('rc_type') != RC_NEW))
+                       return false;
+               
+               // The patrol token is always the same, let's exploit that
+               static $cachedPatrolToken = null;
+               if(!is_null($cachedPatrolToken))
+                       return $cachedPatrolToken;
+
+               $cachedPatrolToken = $wgUser->editToken();
+               return $cachedPatrolToken;
+       }
+
+       /**
+        * Sets internal state to include the desired properties in the output.
+        * @param $prop associative array of properties, only keys are used here
+        */
+       public function initProperties( $prop ) {
+               $this->fld_comment = isset ($prop['comment']);
+               $this->fld_user = isset ($prop['user']);
+               $this->fld_flags = isset ($prop['flags']);
+               $this->fld_timestamp = isset ($prop['timestamp']);
+               $this->fld_title = isset ($prop['title']);
+               $this->fld_ids = isset ($prop['ids']);
+               $this->fld_sizes = isset ($prop['sizes']);
+               $this->fld_redirect = isset($prop['redirect']);
+               $this->fld_patrolled = isset($prop['patrolled']);
+               $this->fld_loginfo = isset($prop['loginfo']);
+       }
+
+       /**
+        * Generates and outputs the result of this query based upon the provided parameters.
+        */
        public function execute() {
-               $limit = $prop = $namespace = $show = $dir = $start = $end = null;
-               extract($this->extractRequestParams());
+               /* Get the parameters of the request. */
+               $params = $this->extractRequestParams();
 
+               /* Build our basic query. Namely, something along the lines of:
+                * SELECT * FROM recentchanges WHERE rc_timestamp > $start
+                *              AND rc_timestamp < $end AND rc_namespace = $namespace
+                *              AND rc_deleted = '0'
+                */
+               $db = $this->getDB();
                $this->addTables('recentchanges');
-               $this->addWhereRange('rc_timestamp', $dir, $start, $end);
-               $this->addWhereFld('rc_namespace', $namespace);
+               $index = 'rc_timestamp'; // May change
+               $this->addWhereRange('rc_timestamp', $params['dir'], $params['start'], $params['end']);
+               $this->addWhereFld('rc_namespace', $params['namespace']);
+               $this->addWhereFld('rc_deleted', 0);
+
+               if(!is_null($params['type']))
+                               $this->addWhereFld('rc_type', $this->parseRCType($params['type']));
+
+               if (!is_null($params['show'])) {
+                       $show = array_flip($params['show']);
+
+                       /* Check for conflicting parameters. */
+                       if ((isset ($show['minor']) && isset ($show['!minor']))
+                                       || (isset ($show['bot']) && isset ($show['!bot']))
+                                       || (isset ($show['anon']) && isset ($show['!anon']))
+                                       || (isset ($show['redirect']) && isset ($show['!redirect']))
+                                       || (isset ($show['patrolled']) && isset ($show['!patrolled']))) {
 
-               if (!is_null($show)) {
-                       $show = array_flip($show);
-                       if ((isset ($show['minor']) && isset ($show['!minor'])) || (isset ($show['bot']) && isset ($show['!bot'])) || (isset ($show['anon']) && isset ($show['!anon'])))
                                $this->dieUsage("Incorrect parameter - mutually exclusive values may not be supplied", 'show');
+                       }
+                       
+                       // Check permissions
+                       global $wgUser;
+                       if((isset($show['patrolled']) || isset($show['!patrolled'])) && !$wgUser->useRCPatrol() && !$wgUser->useNPPatrol())
+                               $this->dieUsage("You need the patrol right to request the patrolled flag", 'permissiondenied');
 
+                       /* Add additional conditions to query depending upon parameters. */
                        $this->addWhereIf('rc_minor = 0', isset ($show['!minor']));
                        $this->addWhereIf('rc_minor != 0', isset ($show['minor']));
                        $this->addWhereIf('rc_bot = 0', isset ($show['!bot']));
                        $this->addWhereIf('rc_bot != 0', isset ($show['bot']));
                        $this->addWhereIf('rc_user = 0', isset ($show['anon']));
                        $this->addWhereIf('rc_user != 0', isset ($show['!anon']));
+                       $this->addWhereIf('rc_patrolled = 0', isset($show['!patrolled']));
+                       $this->addWhereIf('rc_patrolled != 0', isset($show['patrolled']));
+                       $this->addWhereIf('page_is_redirect = 1', isset ($show['redirect']));
+                       // Don't throw log entries out the window here
+                       $this->addWhereIf('page_is_redirect = 0 OR page_is_redirect IS NULL', isset ($show['!redirect']));
                }
+               
+               if(!is_null($params['user']) && !is_null($param['excludeuser']))
+                       $this->dieUsage('user and excludeuser cannot be used together', 'user-excludeuser');
+               if(!is_null($params['user']))
+               {
+                       $this->addWhereFld('rc_user_text', $params['user']);
+                       $index = 'rc_user_text';
+               }
+               if(!is_null($params['excludeuser']))
+                       // We don't use the rc_user_text index here because
+                       // * it would require us to sort by rc_user_text before rc_timestamp
+                       // * the != condition doesn't throw out too many rows anyway
+                       $this->addWhere('rc_user_text != ' . $this->getDB()->addQuotes($params['excludeuser']));
 
+               /* Add the fields we're concerned with to our query. */
                $this->addFields(array (
                        'rc_timestamp',
                        'rc_namespace',
                        'rc_title',
                        'rc_cur_id',
-                       'rc_this_oldid',
-                       'rc_last_oldid',
                        'rc_type',
                        'rc_moved_to_ns',
                        'rc_moved_to_title'
                ));
 
-               if (!is_null($prop)) {
-                       $prop = array_flip($prop);
-                       $this->addFieldsIf('rc_comment', isset ($prop['comment']));
-                       if (isset ($prop['user'])) {
-                               $this->addFields('rc_user');
-                               $this->addFields('rc_user_text');
-                       }
-                       if (isset ($prop['flags'])) {
-                               $this->addFields('rc_minor');
-                               $this->addFields('rc_bot');
-                               $this->addFields('rc_new');
+               /* Determine what properties we need to display. */
+               if (!is_null($params['prop'])) {
+                       $prop = array_flip($params['prop']);
+
+                       /* Set up internal members based upon params. */
+                       $this->initProperties( $prop );
+
+                       global $wgUser;
+                       if($this->fld_patrolled && !$wgUser->useRCPatrol() && !$wgUser->useNPPatrol())
+                               $this->dieUsage("You need the patrol right to request the patrolled flag", 'permissiondenied');
+
+                       /* Add fields to our query if they are specified as a needed parameter. */
+                       $this->addFieldsIf('rc_id', $this->fld_ids);
+                       $this->addFieldsIf('rc_this_oldid', $this->fld_ids);
+                       $this->addFieldsIf('rc_last_oldid', $this->fld_ids);
+                       $this->addFieldsIf('rc_comment', $this->fld_comment);
+                       $this->addFieldsIf('rc_user', $this->fld_user);
+                       $this->addFieldsIf('rc_user_text', $this->fld_user);
+                       $this->addFieldsIf('rc_minor', $this->fld_flags);
+                       $this->addFieldsIf('rc_bot', $this->fld_flags);
+                       $this->addFieldsIf('rc_new', $this->fld_flags);
+                       $this->addFieldsIf('rc_old_len', $this->fld_sizes);
+                       $this->addFieldsIf('rc_new_len', $this->fld_sizes);
+                       $this->addFieldsIf('rc_patrolled', $this->fld_patrolled);
+                       $this->addFieldsIf('rc_logid', $this->fld_loginfo);
+                       $this->addFieldsIf('rc_log_type', $this->fld_loginfo);
+                       $this->addFieldsIf('rc_log_action', $this->fld_loginfo);
+                       $this->addFieldsIf('rc_params', $this->fld_loginfo);
+                       if($this->fld_redirect || isset($show['redirect']) || isset($show['!redirect']))
+                       {
+                               $this->addTables('page');
+                               $this->addJoinConds(array('page' => array('LEFT JOIN', array('rc_namespace=page_namespace', 'rc_title=page_title'))));
+                               $this->addFields('page_is_redirect');
                        }
                }
+               $this->token = $params['token'];
+               $this->addOption('LIMIT', $params['limit'] +1);
+               $this->addOption('USE INDEX', array('recentchanges' => $index));
 
-               $this->addOption('LIMIT', $limit +1);
-               $this->addOption('USE INDEX', 'rc_timestamp');
-
-               $data = array ();
                $count = 0;
-               $db = & $this->getDB();
+               /* Perform the actual query. */
+               $db = $this->getDB();
                $res = $this->select(__METHOD__);
+
+               /* Iterate through the rows, adding data extracted from them to our query result. */
                while ($row = $db->fetchObject($res)) {
-                       if (++ $count > $limit) {
+                       if (++ $count > $params['limit']) {
                                // We've reached the one extra which shows that there are additional pages to be had. Stop here...
-                               $this->setContinueEnumParameter('start', $row->rc_timestamp);
+                               $this->setContinueEnumParameter('start', wfTimestamp(TS_ISO_8601, $row->rc_timestamp));
                                break;
                        }
 
-                       $vals = $this->addRowInfo('rc', $row);
-                       if ($vals)
-                               $data[] = $vals;
+                       /* Extract the data from a single row. */
+                       $vals = $this->extractRowInfo($row);
+
+                       /* Add that row's data to our final output. */
+                       if(!$vals)
+                               continue;
+                       $fit = $this->getResult()->addValue(array('query', $this->getModuleName()), null, $vals);
+                       if(!$fit)
+                       {
+                               $this->setContinueEnumParameter('start', wfTimestamp(TS_ISO_8601, $row->rc_timestamp));
+                               break;
+                       }
                }
+
                $db->freeResult($res);
 
-               $result = $this->getResult();
-               $result->setIndexedTagName($data, 'rc');
-               $result->addValue('query', $this->getModuleName(), $data);
+               /* Format the result */
+               $this->getResult()->setIndexedTagName_internal(array('query', $this->getModuleName()), 'rc');
+       }
+
+       /**
+        * Extracts from a single sql row the data needed to describe one recent change.
+        *
+        * @param $row The row from which to extract the data.
+        * @return An array mapping strings (descriptors) to their respective string values.
+        * @access public
+        */
+       public function extractRowInfo($row) {
+               /* If page was moved somewhere, get the title of the move target. */
+               $movedToTitle = false;
+               if (isset($row->rc_moved_to_title) && $row->rc_moved_to_title !== '')
+                       $movedToTitle = Title :: makeTitle($row->rc_moved_to_ns, $row->rc_moved_to_title);
+
+               /* Determine the title of the page that has been changed. */
+               $title = Title :: makeTitle($row->rc_namespace, $row->rc_title);
+
+               /* Our output data. */
+               $vals = array ();
+
+               $type = intval ( $row->rc_type );
+
+               /* Determine what kind of change this was. */
+               switch ( $type ) {
+                       case RC_EDIT:  $vals['type'] = 'edit'; break;
+                       case RC_NEW:   $vals['type'] = 'new'; break;
+                       case RC_MOVE:  $vals['type'] = 'move'; break;
+                       case RC_LOG:   $vals['type'] = 'log'; break;
+                       case RC_MOVE_OVER_REDIRECT: $vals['type'] = 'move over redirect'; break;
+               default: $vals['type'] = $type;
+               }
+
+               /* Create a new entry in the result for the title. */
+               if ($this->fld_title) {
+                       ApiQueryBase :: addTitleInfo($vals, $title);
+                       if ($movedToTitle)
+                               ApiQueryBase :: addTitleInfo($vals, $movedToTitle, "new_");
+               }
+
+               /* Add ids, such as rcid, pageid, revid, and oldid to the change's info. */
+               if ($this->fld_ids) {
+                       $vals['rcid'] = intval($row->rc_id);
+                       $vals['pageid'] = intval($row->rc_cur_id);
+                       $vals['revid'] = intval($row->rc_this_oldid);
+                       $vals['old_revid'] = intval( $row->rc_last_oldid );
+               }
+
+               /* Add user data and 'anon' flag, if use is anonymous. */
+               if ($this->fld_user) {
+                       $vals['user'] = $row->rc_user_text;
+                       if(!$row->rc_user)
+                               $vals['anon'] = '';
+               }
+
+               /* Add flags, such as new, minor, bot. */
+               if ($this->fld_flags) {
+                       if ($row->rc_bot)
+                               $vals['bot'] = '';
+                       if ($row->rc_new)
+                               $vals['new'] = '';
+                       if ($row->rc_minor)
+                               $vals['minor'] = '';
+               }
+
+               /* Add sizes of each revision. (Only available on 1.10+) */
+               if ($this->fld_sizes) {
+                       $vals['oldlen'] = intval($row->rc_old_len);
+                       $vals['newlen'] = intval($row->rc_new_len);
+               }
+
+               /* Add the timestamp. */
+               if ($this->fld_timestamp)
+                       $vals['timestamp'] = wfTimestamp(TS_ISO_8601, $row->rc_timestamp);
+
+               /* Add edit summary / log summary. */
+               if ($this->fld_comment && isset($row->rc_comment)) {
+                       $vals['comment'] = $row->rc_comment;
+               }
+
+               if ($this->fld_redirect)
+                       if($row->page_is_redirect)
+                               $vals['redirect'] = '';
+
+               /* Add the patrolled flag */
+               if ($this->fld_patrolled && $row->rc_patrolled == 1)
+                       $vals['patrolled'] = '';
+                       
+               if ($this->fld_loginfo && $row->rc_type == RC_LOG) {
+                       $vals['logid'] = intval($row->rc_logid);
+                       $vals['logtype'] = $row->rc_log_type;
+                       $vals['logaction'] = $row->rc_log_action;
+                       ApiQueryLogEvents::addLogParams($this->getResult(),
+                               $vals, $row->rc_params,
+                               $row->rc_log_type, $row->rc_timestamp);
+               }
+               
+               if(!is_null($this->token))
+               {
+                       $tokenFunctions = $this->getTokenFunctions();
+                       foreach($this->token as $t)
+                       {
+                               $val = call_user_func($tokenFunctions[$t], $row->rc_cur_id,
+                                       $title, RecentChange::newFromRow($row));
+                               if($val === false)
+                                       $this->setWarning("Action '$t' is not allowed for the current user");
+                               else
+                                       $vals[$t . 'token'] = $val;
+                       }
+               }
+
+               return $vals;
+       }
+
+       private function parseRCType($type)
+       {
+                       if(is_array($type))
+                       {
+                                       $retval = array();
+                                       foreach($type as $t)
+                                                       $retval[] = $this->parseRCType($t);
+                                       return $retval;
+                       }
+                       switch($type)
+                       {
+                                       case 'edit': return RC_EDIT;
+                                       case 'new': return RC_NEW;
+                                       case 'log': return RC_LOG;
+                       }
        }
 
-       protected function getAllowedParams() {
+       public function getAllowedParams() {
                return array (
                        'start' => array (
                                ApiBase :: PARAM_TYPE => 'timestamp'
@@ -126,14 +396,32 @@ class ApiQueryRecentChanges extends ApiQueryBase {
                                ApiBase :: PARAM_ISMULTI => true,
                                ApiBase :: PARAM_TYPE => 'namespace'
                        ),
+                       'user' => array(
+                               ApiBase :: PARAM_TYPE => 'user'
+                       ),
+                       'excludeuser' => array(
+                               ApiBase :: PARAM_TYPE => 'user'
+                       ),
                        'prop' => array (
                                ApiBase :: PARAM_ISMULTI => true,
+                               ApiBase :: PARAM_DFLT => 'title|timestamp|ids',
                                ApiBase :: PARAM_TYPE => array (
                                        'user',
                                        'comment',
-                                       'flags'
+                                       'flags',
+                                       'timestamp',
+                                       'title',
+                                       'ids',
+                                       'sizes',
+                                       'redirect',
+                                       'patrolled',
+                                       'loginfo',
                                )
                        ),
+                       'token' => array(
+                               ApiBase :: PARAM_TYPE => array_keys($this->getTokenFunctions()),
+                               ApiBase :: PARAM_ISMULTI => true
+                       ),
                        'show' => array (
                                ApiBase :: PARAM_ISMULTI => true,
                                ApiBase :: PARAM_TYPE => array (
@@ -142,35 +430,51 @@ class ApiQueryRecentChanges extends ApiQueryBase {
                                        'bot',
                                        '!bot',
                                        'anon',
-                                       '!anon'
+                                       '!anon',
+                                       'redirect',
+                                       '!redirect',
+                                       'patrolled',
+                                       '!patrolled'
                                )
                        ),
                        'limit' => array (
                                ApiBase :: PARAM_DFLT => 10,
                                ApiBase :: PARAM_TYPE => 'limit',
                                ApiBase :: PARAM_MIN => 1,
-                               ApiBase :: PARAM_MAX1 => ApiBase :: LIMIT_BIG1,
+                               ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
                                ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
+                       ),
+                       'type' => array (
+                               ApiBase :: PARAM_ISMULTI => true,
+                               ApiBase :: PARAM_TYPE => array (
+                                       'edit',
+                                       'new',
+                                       'log'
+                               )
                        )
                );
        }
 
-       protected function getParamDescription() {
+       public function getParamDescription() {
                return array (
                        'start' => 'The timestamp to start enumerating from.',
                        'end' => 'The timestamp to end enumerating.',
                        'dir' => 'In which direction to enumerate.',
                        'namespace' => 'Filter log entries to only this namespace(s)',
+                       'user' => 'Only list changes by this user',
+                       'excludeuser' => 'Don\'t list changes by this user',
                        'prop' => 'Include additional pieces of information',
+                       'token' => 'Which tokens to obtain for each change',
                        'show' => array (
                                'Show only items that meet this criteria.',
                                'For example, to see only minor edits done by logged-in users, set show=minor|!anon'
                        ),
-                       'limit' => 'How many total pages to return.'
+                       'type' => 'Which types of changes to show.',
+                       'limit' => 'How many total changes to return.'
                );
        }
 
-       protected function getDescription() {
+       public function getDescription() {
                return 'Enumerate recent changes';
        }
 
@@ -184,4 +488,3 @@ class ApiQueryRecentChanges extends ApiQueryBase {
                return __CLASS__ . ': $Id$';
        }
 }
-?>
\ No newline at end of file