793 lines
22 KiB
PHP
793 lines
22 KiB
PHP
<?php
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/**
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*
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*
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* Created on Sep 24, 2006
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*
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* Copyright © 2006 Yuri Astrakhan "<Firstname><Lastname>@gmail.com"
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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*/
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/**
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* This class contains a list of pages that the client has requested.
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* Initially, when the client passes in titles=, pageids=, or revisions=
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* parameter, an instance of the ApiPageSet class will normalize titles,
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* determine if the pages/revisions exist, and prefetch any additional page
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* data requested.
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*
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* When a generator is used, the result of the generator will become the input
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* for the second instance of this class, and all subsequent actions will use
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* the second instance for all their work.
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*
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* @ingroup API
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*/
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class ApiPageSet extends ApiQueryBase {
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private $mAllPages; // [ns][dbkey] => page_id or negative when missing
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private $mTitles, $mGoodTitles, $mMissingTitles, $mInvalidTitles;
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private $mMissingPageIDs, $mRedirectTitles, $mSpecialTitles;
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private $mNormalizedTitles, $mInterwikiTitles;
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private $mResolveRedirects, $mPendingRedirectIDs;
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private $mConvertTitles, $mConvertedTitles;
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private $mGoodRevIDs, $mMissingRevIDs;
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private $mFakePageId;
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private $mRequestedPageFields;
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/**
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* Constructor
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* @param $query ApiBase
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* @param $resolveRedirects bool Whether redirects should be resolved
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* @param $convertTitles bool
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*/
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public function __construct( $query, $resolveRedirects = false, $convertTitles = false ) {
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parent::__construct( $query, 'query' );
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$this->mAllPages = array();
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$this->mTitles = array();
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$this->mGoodTitles = array();
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$this->mMissingTitles = array();
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$this->mInvalidTitles = array();
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$this->mMissingPageIDs = array();
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$this->mRedirectTitles = array();
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$this->mNormalizedTitles = array();
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$this->mInterwikiTitles = array();
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$this->mGoodRevIDs = array();
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$this->mMissingRevIDs = array();
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$this->mSpecialTitles = array();
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$this->mRequestedPageFields = array();
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$this->mResolveRedirects = $resolveRedirects;
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if ( $resolveRedirects ) {
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$this->mPendingRedirectIDs = array();
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}
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$this->mConvertTitles = $convertTitles;
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$this->mConvertedTitles = array();
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$this->mFakePageId = - 1;
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}
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/**
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* Check whether this PageSet is resolving redirects
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* @return bool
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*/
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public function isResolvingRedirects() {
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return $this->mResolveRedirects;
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}
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/**
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* Request an additional field from the page table. Must be called
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* before execute()
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* @param $fieldName string Field name
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*/
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public function requestField( $fieldName ) {
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$this->mRequestedPageFields[$fieldName] = null;
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}
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/**
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* Get the value of a custom field previously requested through
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* requestField()
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* @param $fieldName string Field name
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* @return mixed Field value
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*/
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public function getCustomField( $fieldName ) {
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return $this->mRequestedPageFields[$fieldName];
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}
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/**
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* Get the fields that have to be queried from the page table:
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* the ones requested through requestField() and a few basic ones
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* we always need
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* @return array of field names
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*/
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public function getPageTableFields() {
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// Ensure we get minimum required fields
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// DON'T change this order
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$pageFlds = array(
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'page_namespace' => null,
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'page_title' => null,
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'page_id' => null,
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);
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if ( $this->mResolveRedirects ) {
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$pageFlds['page_is_redirect'] = null;
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}
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// only store non-default fields
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$this->mRequestedPageFields = array_diff_key( $this->mRequestedPageFields, $pageFlds );
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$pageFlds = array_merge( $pageFlds, $this->mRequestedPageFields );
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return array_keys( $pageFlds );
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}
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/**
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* Returns an array [ns][dbkey] => page_id for all requested titles.
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* page_id is a unique negative number in case title was not found.
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* Invalid titles will also have negative page IDs and will be in namespace 0
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* @return array
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*/
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public function getAllTitlesByNamespace() {
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return $this->mAllPages;
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}
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/**
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* All Title objects provided.
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* @return array of Title objects
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*/
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public function getTitles() {
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return $this->mTitles;
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}
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/**
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* Returns the number of unique pages (not revisions) in the set.
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* @return int
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*/
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public function getTitleCount() {
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return count( $this->mTitles );
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}
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/**
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* Title objects that were found in the database.
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* @return array page_id (int) => Title (obj)
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*/
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public function getGoodTitles() {
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return $this->mGoodTitles;
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}
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/**
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* Returns the number of found unique pages (not revisions) in the set.
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* @return int
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*/
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public function getGoodTitleCount() {
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return count( $this->mGoodTitles );
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}
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/**
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* Title objects that were NOT found in the database.
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* The array's index will be negative for each item
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* @return array of Title objects
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*/
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public function getMissingTitles() {
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return $this->mMissingTitles;
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}
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/**
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* Titles that were deemed invalid by Title::newFromText()
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* The array's index will be unique and negative for each item
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* @return array of strings (not Title objects)
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*/
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public function getInvalidTitles() {
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return $this->mInvalidTitles;
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}
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/**
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* Page IDs that were not found in the database
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* @return array of page IDs
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*/
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public function getMissingPageIDs() {
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return $this->mMissingPageIDs;
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}
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/**
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* Get a list of redirect resolutions - maps a title to its redirect
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* target.
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* @return array prefixed_title (string) => Title object
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*/
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public function getRedirectTitles() {
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return $this->mRedirectTitles;
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}
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/**
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* Get a list of title normalizations - maps a title to its normalized
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* version.
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* @return array raw_prefixed_title (string) => prefixed_title (string)
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*/
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public function getNormalizedTitles() {
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return $this->mNormalizedTitles;
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}
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/**
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* Get a list of title conversions - maps a title to its converted
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* version.
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* @return array raw_prefixed_title (string) => prefixed_title (string)
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*/
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public function getConvertedTitles() {
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return $this->mConvertedTitles;
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}
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/**
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* Get a list of interwiki titles - maps a title to its interwiki
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* prefix.
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* @return array raw_prefixed_title (string) => interwiki_prefix (string)
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*/
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public function getInterwikiTitles() {
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return $this->mInterwikiTitles;
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}
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/**
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* Get the list of revision IDs (requested with the revids= parameter)
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* @return array revID (int) => pageID (int)
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*/
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public function getRevisionIDs() {
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return $this->mGoodRevIDs;
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}
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/**
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* Revision IDs that were not found in the database
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* @return array of revision IDs
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*/
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public function getMissingRevisionIDs() {
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return $this->mMissingRevIDs;
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}
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/**
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* Get the list of titles with negative namespace
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* @return array Title
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*/
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public function getSpecialTitles() {
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return $this->mSpecialTitles;
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}
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/**
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* Returns the number of revisions (requested with revids= parameter).
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* @return int Number of revisions.
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*/
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public function getRevisionCount() {
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return count( $this->getRevisionIDs() );
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}
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/**
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* Populate the PageSet from the request parameters.
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*/
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public function execute() {
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$this->profileIn();
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$params = $this->extractRequestParams();
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// Only one of the titles/pageids/revids is allowed at the same time
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$dataSource = null;
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if ( isset( $params['titles'] ) ) {
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$dataSource = 'titles';
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}
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if ( isset( $params['pageids'] ) ) {
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if ( isset( $dataSource ) ) {
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$this->dieUsage( "Cannot use 'pageids' at the same time as '$dataSource'", 'multisource' );
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}
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$dataSource = 'pageids';
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}
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if ( isset( $params['revids'] ) ) {
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if ( isset( $dataSource ) ) {
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$this->dieUsage( "Cannot use 'revids' at the same time as '$dataSource'", 'multisource' );
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}
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$dataSource = 'revids';
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}
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switch ( $dataSource ) {
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case 'titles':
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$this->initFromTitles( $params['titles'] );
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break;
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case 'pageids':
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$this->initFromPageIds( $params['pageids'] );
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break;
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case 'revids':
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if ( $this->mResolveRedirects ) {
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$this->setWarning( 'Redirect resolution cannot be used together with the revids= parameter. ' .
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'Any redirects the revids= point to have not been resolved.' );
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}
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$this->mResolveRedirects = false;
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$this->initFromRevIDs( $params['revids'] );
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break;
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default:
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// Do nothing - some queries do not need any of the data sources.
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break;
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}
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$this->profileOut();
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}
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/**
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* Populate this PageSet from a list of Titles
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* @param $titles array of Title objects
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*/
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public function populateFromTitles( $titles ) {
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$this->profileIn();
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$this->initFromTitles( $titles );
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$this->profileOut();
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}
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/**
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* Populate this PageSet from a list of page IDs
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* @param $pageIDs array of page IDs
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*/
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public function populateFromPageIDs( $pageIDs ) {
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$this->profileIn();
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$this->initFromPageIds( $pageIDs );
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$this->profileOut();
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}
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/**
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* Populate this PageSet from a rowset returned from the database
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* @param $db DatabaseBase object
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* @param $queryResult ResultWrapper Query result object
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*/
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public function populateFromQueryResult( $db, $queryResult ) {
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$this->profileIn();
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$this->initFromQueryResult( $queryResult );
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$this->profileOut();
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}
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/**
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* Populate this PageSet from a list of revision IDs
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* @param $revIDs array of revision IDs
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*/
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public function populateFromRevisionIDs( $revIDs ) {
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$this->profileIn();
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$this->initFromRevIDs( $revIDs );
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$this->profileOut();
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}
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/**
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* Extract all requested fields from the row received from the database
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* @param $row Result row
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*/
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public function processDbRow( $row ) {
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// Store Title object in various data structures
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$title = Title::newFromRow( $row );
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$pageId = intval( $row->page_id );
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$this->mAllPages[$row->page_namespace][$row->page_title] = $pageId;
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$this->mTitles[] = $title;
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if ( $this->mResolveRedirects && $row->page_is_redirect == '1' ) {
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$this->mPendingRedirectIDs[$pageId] = $title;
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} else {
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$this->mGoodTitles[$pageId] = $title;
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}
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foreach ( $this->mRequestedPageFields as $fieldName => &$fieldValues ) {
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$fieldValues[$pageId] = $row-> $fieldName;
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}
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}
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/**
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* Resolve redirects, if applicable
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*/
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public function finishPageSetGeneration() {
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$this->profileIn();
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$this->resolvePendingRedirects();
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$this->profileOut();
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}
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/**
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* This method populates internal variables with page information
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* based on the given array of title strings.
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*
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* Steps:
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* #1 For each title, get data from `page` table
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* #2 If page was not found in the DB, store it as missing
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*
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* Additionally, when resolving redirects:
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* #3 If no more redirects left, stop.
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* #4 For each redirect, get its target from the `redirect` table.
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* #5 Substitute the original LinkBatch object with the new list
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* #6 Repeat from step #1
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*
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* @param $titles array of Title objects or strings
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*/
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private function initFromTitles( $titles ) {
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// Get validated and normalized title objects
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$linkBatch = $this->processTitlesArray( $titles );
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if ( $linkBatch->isEmpty() ) {
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return;
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}
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$db = $this->getDB();
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$set = $linkBatch->constructSet( 'page', $db );
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// Get pageIDs data from the `page` table
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$this->profileDBIn();
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$res = $db->select( 'page', $this->getPageTableFields(), $set,
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__METHOD__ );
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$this->profileDBOut();
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// Hack: get the ns:titles stored in array(ns => array(titles)) format
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$this->initFromQueryResult( $res, $linkBatch->data, true ); // process Titles
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// Resolve any found redirects
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$this->resolvePendingRedirects();
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}
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/**
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* Does the same as initFromTitles(), but is based on page IDs instead
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* @param $pageids array of page IDs
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*/
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private function initFromPageIds( $pageids ) {
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if ( !count( $pageids ) ) {
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return;
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}
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$pageids = array_map( 'intval', $pageids ); // paranoia
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$remaining = array_flip( $pageids );
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$pageids = self::getPositiveIntegers( $pageids );
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$res = null;
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if ( count( $pageids ) ) {
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$set = array(
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'page_id' => $pageids
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);
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$db = $this->getDB();
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// Get pageIDs data from the `page` table
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$this->profileDBIn();
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$res = $db->select( 'page', $this->getPageTableFields(), $set,
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__METHOD__ );
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$this->profileDBOut();
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}
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$this->initFromQueryResult( $res, $remaining, false ); // process PageIDs
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// Resolve any found redirects
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$this->resolvePendingRedirects();
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}
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/**
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* Iterate through the result of the query on 'page' table,
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* and for each row create and store title object and save any extra fields requested.
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* @param $res ResultWrapper DB Query result
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* @param $remaining array of either pageID or ns/title elements (optional).
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* If given, any missing items will go to $mMissingPageIDs and $mMissingTitles
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* @param $processTitles bool Must be provided together with $remaining.
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* If true, treat $remaining as an array of [ns][title]
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* If false, treat it as an array of [pageIDs]
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*/
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private function initFromQueryResult( $res, &$remaining = null, $processTitles = null ) {
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if ( !is_null( $remaining ) && is_null( $processTitles ) ) {
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ApiBase::dieDebug( __METHOD__, 'Missing $processTitles parameter when $remaining is provided' );
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}
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$usernames = array();
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if ( $res ) {
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foreach ( $res as $row ) {
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$pageId = intval( $row->page_id );
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// Remove found page from the list of remaining items
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if ( isset( $remaining ) ) {
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if ( $processTitles ) {
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unset( $remaining[$row->page_namespace][$row->page_title] );
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} else {
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unset( $remaining[$pageId] );
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}
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}
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// Store any extra fields requested by modules
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$this->processDbRow( $row );
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// Need gender information
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if( MWNamespace::hasGenderDistinction( $row->page_namespace ) ) {
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$usernames[] = $row->page_title;
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}
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}
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}
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if ( isset( $remaining ) ) {
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// Any items left in the $remaining list are added as missing
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if ( $processTitles ) {
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// The remaining titles in $remaining are non-existent pages
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foreach ( $remaining as $ns => $dbkeys ) {
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foreach ( array_keys( $dbkeys ) as $dbkey ) {
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$title = Title::makeTitle( $ns, $dbkey );
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$this->mAllPages[$ns][$dbkey] = $this->mFakePageId;
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$this->mMissingTitles[$this->mFakePageId] = $title;
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$this->mFakePageId--;
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$this->mTitles[] = $title;
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// need gender information
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if( MWNamespace::hasGenderDistinction( $ns ) ) {
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$usernames[] = $dbkey;
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}
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}
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}
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} else {
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// The remaining pageids do not exist
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if ( !$this->mMissingPageIDs ) {
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$this->mMissingPageIDs = array_keys( $remaining );
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} else {
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$this->mMissingPageIDs = array_merge( $this->mMissingPageIDs, array_keys( $remaining ) );
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}
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}
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}
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// Get gender information
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$genderCache = GenderCache::singleton();
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$genderCache->doQuery( $usernames, __METHOD__ );
|
|
}
|
|
|
|
/**
|
|
* Does the same as initFromTitles(), but is based on revision IDs
|
|
* instead
|
|
* @param $revids array of revision IDs
|
|
*/
|
|
private function initFromRevIDs( $revids ) {
|
|
if ( !count( $revids ) ) {
|
|
return;
|
|
}
|
|
|
|
$revids = array_map( 'intval', $revids ); // paranoia
|
|
$db = $this->getDB();
|
|
$pageids = array();
|
|
$remaining = array_flip( $revids );
|
|
|
|
$revids = self::getPositiveIntegers( $revids );
|
|
|
|
if ( count( $revids ) ) {
|
|
$tables = array( 'revision', 'page' );
|
|
$fields = array( 'rev_id', 'rev_page' );
|
|
$where = array( 'rev_id' => $revids, 'rev_page = page_id' );
|
|
|
|
// Get pageIDs data from the `page` table
|
|
$this->profileDBIn();
|
|
$res = $db->select( $tables, $fields, $where, __METHOD__ );
|
|
foreach ( $res as $row ) {
|
|
$revid = intval( $row->rev_id );
|
|
$pageid = intval( $row->rev_page );
|
|
$this->mGoodRevIDs[$revid] = $pageid;
|
|
$pageids[$pageid] = '';
|
|
unset( $remaining[$revid] );
|
|
}
|
|
$this->profileDBOut();
|
|
}
|
|
|
|
$this->mMissingRevIDs = array_keys( $remaining );
|
|
|
|
// Populate all the page information
|
|
$this->initFromPageIds( array_keys( $pageids ) );
|
|
}
|
|
|
|
/**
|
|
* Resolve any redirects in the result if redirect resolution was
|
|
* requested. This function is called repeatedly until all redirects
|
|
* have been resolved.
|
|
*/
|
|
private function resolvePendingRedirects() {
|
|
if ( $this->mResolveRedirects ) {
|
|
$db = $this->getDB();
|
|
$pageFlds = $this->getPageTableFields();
|
|
|
|
// Repeat until all redirects have been resolved
|
|
// The infinite loop is prevented by keeping all known pages in $this->mAllPages
|
|
while ( $this->mPendingRedirectIDs ) {
|
|
// Resolve redirects by querying the pagelinks table, and repeat the process
|
|
// Create a new linkBatch object for the next pass
|
|
$linkBatch = $this->getRedirectTargets();
|
|
|
|
if ( $linkBatch->isEmpty() ) {
|
|
break;
|
|
}
|
|
|
|
$set = $linkBatch->constructSet( 'page', $db );
|
|
if ( $set === false ) {
|
|
break;
|
|
}
|
|
|
|
// Get pageIDs data from the `page` table
|
|
$this->profileDBIn();
|
|
$res = $db->select( 'page', $pageFlds, $set, __METHOD__ );
|
|
$this->profileDBOut();
|
|
|
|
// Hack: get the ns:titles stored in array(ns => array(titles)) format
|
|
$this->initFromQueryResult( $res, $linkBatch->data, true );
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the targets of the pending redirects from the database
|
|
*
|
|
* Also creates entries in the redirect table for redirects that don't
|
|
* have one.
|
|
* @return LinkBatch
|
|
*/
|
|
private function getRedirectTargets() {
|
|
$lb = new LinkBatch();
|
|
$db = $this->getDB();
|
|
|
|
$this->profileDBIn();
|
|
$res = $db->select(
|
|
'redirect',
|
|
array(
|
|
'rd_from',
|
|
'rd_namespace',
|
|
'rd_fragment',
|
|
'rd_interwiki',
|
|
'rd_title'
|
|
), array( 'rd_from' => array_keys( $this->mPendingRedirectIDs ) ),
|
|
__METHOD__
|
|
);
|
|
$this->profileDBOut();
|
|
foreach ( $res as $row ) {
|
|
$rdfrom = intval( $row->rd_from );
|
|
$from = $this->mPendingRedirectIDs[$rdfrom]->getPrefixedText();
|
|
$to = Title::makeTitle( $row->rd_namespace, $row->rd_title, $row->rd_fragment, $row->rd_interwiki );
|
|
unset( $this->mPendingRedirectIDs[$rdfrom] );
|
|
if ( !isset( $this->mAllPages[$row->rd_namespace][$row->rd_title] ) ) {
|
|
$lb->add( $row->rd_namespace, $row->rd_title );
|
|
}
|
|
$this->mRedirectTitles[$from] = $to;
|
|
}
|
|
|
|
if ( $this->mPendingRedirectIDs ) {
|
|
// We found pages that aren't in the redirect table
|
|
// Add them
|
|
foreach ( $this->mPendingRedirectIDs as $id => $title ) {
|
|
$page = WikiPage::factory( $title );
|
|
$rt = $page->insertRedirect();
|
|
if ( !$rt ) {
|
|
// What the hell. Let's just ignore this
|
|
continue;
|
|
}
|
|
$lb->addObj( $rt );
|
|
$this->mRedirectTitles[$title->getPrefixedText()] = $rt;
|
|
unset( $this->mPendingRedirectIDs[$id] );
|
|
}
|
|
}
|
|
return $lb;
|
|
}
|
|
|
|
/**
|
|
* Given an array of title strings, convert them into Title objects.
|
|
* Alternativelly, an array of Title objects may be given.
|
|
* This method validates access rights for the title,
|
|
* and appends normalization values to the output.
|
|
*
|
|
* @param $titles array of Title objects or strings
|
|
* @return LinkBatch
|
|
*/
|
|
private function processTitlesArray( $titles ) {
|
|
$genderCache = GenderCache::singleton();
|
|
$genderCache->doTitlesArray( $titles, __METHOD__ );
|
|
|
|
$linkBatch = new LinkBatch();
|
|
|
|
foreach ( $titles as $title ) {
|
|
$titleObj = is_string( $title ) ? Title::newFromText( $title ) : $title;
|
|
if ( !$titleObj ) {
|
|
// Handle invalid titles gracefully
|
|
$this->mAllpages[0][$title] = $this->mFakePageId;
|
|
$this->mInvalidTitles[$this->mFakePageId] = $title;
|
|
$this->mFakePageId--;
|
|
continue; // There's nothing else we can do
|
|
}
|
|
$unconvertedTitle = $titleObj->getPrefixedText();
|
|
$titleWasConverted = false;
|
|
$iw = $titleObj->getInterwiki();
|
|
if ( strval( $iw ) !== '' ) {
|
|
// This title is an interwiki link.
|
|
$this->mInterwikiTitles[$titleObj->getPrefixedText()] = $iw;
|
|
} else {
|
|
// Variants checking
|
|
global $wgContLang;
|
|
if ( $this->mConvertTitles &&
|
|
count( $wgContLang->getVariants() ) > 1 &&
|
|
!$titleObj->exists() ) {
|
|
// Language::findVariantLink will modify titleObj into
|
|
// the canonical variant if possible
|
|
$wgContLang->findVariantLink( $title, $titleObj );
|
|
$titleWasConverted = $unconvertedTitle !== $titleObj->getPrefixedText();
|
|
}
|
|
|
|
if ( $titleObj->getNamespace() < 0 ) {
|
|
// Handle Special and Media pages
|
|
$titleObj = $titleObj->fixSpecialName();
|
|
$this->mSpecialTitles[$this->mFakePageId] = $titleObj;
|
|
$this->mFakePageId--;
|
|
} else {
|
|
// Regular page
|
|
$linkBatch->addObj( $titleObj );
|
|
}
|
|
}
|
|
|
|
// Make sure we remember the original title that was
|
|
// given to us. This way the caller can correlate new
|
|
// titles with the originally requested when e.g. the
|
|
// namespace is localized or the capitalization is
|
|
// different
|
|
if ( $titleWasConverted ) {
|
|
$this->mConvertedTitles[$title] = $titleObj->getPrefixedText();
|
|
} elseif ( is_string( $title ) && $title !== $titleObj->getPrefixedText() ) {
|
|
$this->mNormalizedTitles[$title] = $titleObj->getPrefixedText();
|
|
}
|
|
}
|
|
|
|
return $linkBatch;
|
|
}
|
|
|
|
/**
|
|
* Returns the input array of integers with all values < 0 removed
|
|
*
|
|
* @param $array array
|
|
* @return array
|
|
*/
|
|
private static function getPositiveIntegers( $array ) {
|
|
// bug 25734 API: possible issue with revids validation
|
|
// It seems with a load of revision rows, MySQL gets upset
|
|
// Remove any < 0 integers, as they can't be valid
|
|
foreach( $array as $i => $int ) {
|
|
if ( $int < 0 ) {
|
|
unset( $array[$i] );
|
|
}
|
|
}
|
|
|
|
return $array;
|
|
}
|
|
|
|
public function getAllowedParams() {
|
|
return array(
|
|
'titles' => array(
|
|
ApiBase::PARAM_ISMULTI => true
|
|
),
|
|
'pageids' => array(
|
|
ApiBase::PARAM_TYPE => 'integer',
|
|
ApiBase::PARAM_ISMULTI => true
|
|
),
|
|
'revids' => array(
|
|
ApiBase::PARAM_TYPE => 'integer',
|
|
ApiBase::PARAM_ISMULTI => true
|
|
)
|
|
);
|
|
}
|
|
|
|
public function getParamDescription() {
|
|
return array(
|
|
'titles' => 'A list of titles to work on',
|
|
'pageids' => 'A list of page IDs to work on',
|
|
'revids' => 'A list of revision IDs to work on'
|
|
);
|
|
}
|
|
|
|
public function getPossibleErrors() {
|
|
return array_merge( parent::getPossibleErrors(), array(
|
|
array( 'code' => 'multisource', 'info' => "Cannot use 'pageids' at the same time as 'dataSource'" ),
|
|
array( 'code' => 'multisource', 'info' => "Cannot use 'revids' at the same time as 'dataSource'" ),
|
|
) );
|
|
}
|
|
|
|
public function getVersion() {
|
|
return __CLASS__ . ': $Id$';
|
|
}
|
|
}
|