346 lines
9.6 KiB
PHP
346 lines
9.6 KiB
PHP
<?php
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/**
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* API for MediaWiki 1.8+
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*
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* Created on Sep 4, 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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if ( !defined( 'MEDIAWIKI' ) ) {
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// Eclipse helper - will be ignored in production
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require_once( 'ApiBase.php' );
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}
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/**
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* This class represents the result of the API operations.
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* It simply wraps a nested array() structure, adding some functions to simplify array's modifications.
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* As various modules execute, they add different pieces of information to this result,
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* structuring it as it will be given to the client.
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*
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* Each subarray may either be a dictionary - key-value pairs with unique keys,
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* or lists, where the items are added using $data[] = $value notation.
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*
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* There are two special key values that change how XML output is generated:
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* '_element' This key sets the tag name for the rest of the elements in the current array.
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* It is only inserted if the formatter returned true for getNeedsRawData()
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* '*' This key has special meaning only to the XML formatter, and is outputed as is
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* for all others. In XML it becomes the content of the current element.
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*
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* @ingroup API
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*/
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class ApiResult extends ApiBase {
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private $mData, $mIsRawMode, $mSize, $mCheckingSize;
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/**
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* Constructor
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* @param $main ApiMain object
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*/
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public function __construct( $main ) {
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parent::__construct( $main, 'result' );
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$this->mIsRawMode = false;
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$this->mCheckingSize = true;
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$this->reset();
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}
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/**
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* Clear the current result data.
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*/
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public function reset() {
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$this->mData = array();
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$this->mSize = 0;
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}
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/**
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* Call this function when special elements such as '_element'
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* are needed by the formatter, for example in XML printing.
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*/
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public function setRawMode() {
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$this->mIsRawMode = true;
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}
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/**
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* Returns true whether the formatter requested raw data.
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* @return bool
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*/
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public function getIsRawMode() {
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return $this->mIsRawMode;
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}
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/**
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* Get the result's internal data array (read-only)
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* @return array
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*/
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public function getData() {
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return $this->mData;
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}
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/**
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* Get the 'real' size of a result item. This means the strlen() of the item,
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* or the sum of the strlen()s of the elements if the item is an array.
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* @param $value mixed
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* @return int
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*/
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public static function size( $value ) {
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$s = 0;
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if ( is_array( $value ) ) {
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foreach ( $value as $v ) {
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$s += self::size( $v );
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}
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} elseif ( !is_object( $value ) ) {
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// Objects can't always be cast to string
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$s = strlen( $value );
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}
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return $s;
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}
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/**
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* Get the size of the result, i.e. the amount of bytes in it
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* @return int
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*/
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public function getSize() {
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return $this->mSize;
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}
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/**
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* Disable size checking in addValue(). Don't use this unless you
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* REALLY know what you're doing. Values added while size checking
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* was disabled will not be counted (ever)
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*/
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public function disableSizeCheck() {
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$this->mCheckingSize = false;
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}
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/**
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* Re-enable size checking in addValue()
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*/
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public function enableSizeCheck() {
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$this->mCheckingSize = true;
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}
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/**
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* Add an output value to the array by name.
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* Verifies that value with the same name has not been added before.
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* @param $arr array to add $value to
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* @param $name string Index of $arr to add $value at
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* @param $value mixed
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* @param $overwrite bool Whether overwriting an existing element is allowed
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*/
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public static function setElement( &$arr, $name, $value, $overwrite = false ) {
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if ( $arr === null || $name === null || $value === null || !is_array( $arr ) || is_array( $name ) ) {
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ApiBase::dieDebug( __METHOD__, 'Bad parameter' );
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}
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if ( !isset ( $arr[$name] ) || $overwrite ) {
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$arr[$name] = $value;
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} elseif ( is_array( $arr[$name] ) && is_array( $value ) ) {
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$merged = array_intersect_key( $arr[$name], $value );
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if ( !count( $merged ) ) {
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$arr[$name] += $value;
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} else {
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ApiBase::dieDebug( __METHOD__, "Attempting to merge element $name" );
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}
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} else {
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ApiBase::dieDebug( __METHOD__, "Attempting to add element $name=$value, existing value is {$arr[$name]}" );
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}
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}
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/**
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* Adds a content element to an array.
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* Use this function instead of hardcoding the '*' element.
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* @param $arr array to add the content element to
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* @param $value Mixed
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* @param $subElemName string when present, content element is created
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* as a sub item of $arr. Use this parameter to create elements in
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* format <elem>text</elem> without attributes
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*/
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public static function setContent( &$arr, $value, $subElemName = null ) {
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if ( is_array( $value ) ) {
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ApiBase::dieDebug( __METHOD__, 'Bad parameter' );
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}
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if ( is_null( $subElemName ) ) {
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ApiResult::setElement( $arr, '*', $value );
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} else {
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if ( !isset( $arr[$subElemName] ) ) {
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$arr[$subElemName] = array();
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}
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ApiResult::setElement( $arr[$subElemName], '*', $value );
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}
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}
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/**
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* In case the array contains indexed values (in addition to named),
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* give all indexed values the given tag name. This function MUST be
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* called on every array that has numerical indexes.
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* @param $arr array
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* @param $tag string Tag name
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*/
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public function setIndexedTagName( &$arr, $tag ) {
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// In raw mode, add the '_element', otherwise just ignore
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if ( !$this->getIsRawMode() ) {
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return;
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}
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if ( $arr === null || $tag === null || !is_array( $arr ) || is_array( $tag ) ) {
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ApiBase::dieDebug( __METHOD__, 'Bad parameter' );
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}
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// Do not use setElement() as it is ok to call this more than once
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$arr['_element'] = $tag;
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}
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/**
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* Calls setIndexedTagName() on each sub-array of $arr
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* @param $arr array
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* @param $tag string Tag name
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*/
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public function setIndexedTagName_recursive( &$arr, $tag ) {
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if ( !is_array( $arr ) ) {
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return;
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}
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foreach ( $arr as &$a ) {
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if ( !is_array( $a ) ) {
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continue;
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}
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$this->setIndexedTagName( $a, $tag );
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$this->setIndexedTagName_recursive( $a, $tag );
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}
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}
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/**
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* Calls setIndexedTagName() on an array already in the result.
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* Don't specify a path to a value that's not in the result, or
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* you'll get nasty errors.
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* @param $path array Path to the array, like addValue()'s $path
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* @param $tag string
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*/
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public function setIndexedTagName_internal( $path, $tag ) {
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$data = &$this->mData;
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foreach ( (array)$path as $p ) {
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if ( !isset( $data[$p] ) ) {
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$data[$p] = array();
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}
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$data = &$data[$p];
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}
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if ( is_null( $data ) ) {
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return;
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}
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$this->setIndexedTagName( $data, $tag );
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}
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/**
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* Add value to the output data at the given path.
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* Path is an indexed array, each element specifying the branch at which to add the new value
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* Setting $path to array('a','b','c') is equivalent to data['a']['b']['c'] = $value
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* If $name is empty, the $value is added as a next list element data[] = $value
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* @return bool True if $value fits in the result, false if not
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*/
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public function addValue( $path, $name, $value, $overwrite = false ) {
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global $wgAPIMaxResultSize;
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$data = &$this->mData;
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if ( $this->mCheckingSize ) {
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$newsize = $this->mSize + self::size( $value );
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if ( $newsize > $wgAPIMaxResultSize ) {
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return false;
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}
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$this->mSize = $newsize;
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}
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if ( !is_null( $path ) ) {
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if ( is_array( $path ) ) {
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foreach ( $path as $p ) {
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if ( !isset( $data[$p] ) ) {
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$data[$p] = array();
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}
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$data = &$data[$p];
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}
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} else {
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if ( !isset( $data[$path] ) ) {
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$data[$path] = array();
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}
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$data = &$data[$path];
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}
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}
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if ( !$name ) {
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$data[] = $value; // Add list element
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} else {
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self::setElement( $data, $name, $value, $overwrite ); // Add named element
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}
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return true;
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}
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/**
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* Add a parsed limit=max to the result.
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*
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* @param $moduleName string
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* @param $limit int
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*/
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public function setParsedLimit( $moduleName, $limit ) {
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// Add value, allowing overwriting
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$this->addValue( 'limits', $moduleName, $limit, true );
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}
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/**
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* Unset a value previously added to the result set.
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* Fails silently if the value isn't found.
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* For parameters, see addValue()
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* @param $path array
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* @param $name string
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*/
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public function unsetValue( $path, $name ) {
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$data = &$this->mData;
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if ( !is_null( $path ) ) {
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foreach ( (array)$path as $p ) {
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if ( !isset( $data[$p] ) ) {
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return;
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}
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$data = &$data[$p];
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}
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}
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$this->mSize -= self::size( $data[$name] );
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unset( $data[$name] );
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}
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/**
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* Ensure all values in this result are valid UTF-8.
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*/
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public function cleanUpUTF8() {
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array_walk_recursive( $this->mData, array( 'ApiResult', 'cleanUp_helper' ) );
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}
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/**
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* Callback function for cleanUpUTF8()
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*/
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private static function cleanUp_helper( &$s ) {
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if ( !is_string( $s ) ) {
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return;
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}
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global $wgContLang;
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$s = $wgContLang->normalize( $s );
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}
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public function execute() {
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ApiBase::dieDebug( __METHOD__, 'execute() is not supported on Result object' );
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}
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public function getVersion() {
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return __CLASS__ . ': $Id$';
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}
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}
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