341 lines
9.4 KiB
PHP
341 lines
9.4 KiB
PHP
<?php
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/*
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* Created on Sep 4, 2006
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*
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* API for MediaWiki 1.8+
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*
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* Copyright (C) 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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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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* http://www.gnu.org/copyleft/gpl.html
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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($v);
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else if(!is_object($value))
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// Objects can't always be cast to string
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$s = strlen($value);
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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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*/
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public static function setElement(& $arr, $name, $value) {
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if ($arr === null || $name === null || $value === null || !is_array($arr) || is_array($name))
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ApiBase :: dieDebug(__METHOD__, 'Bad parameter');
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if (!isset ($arr[$name])) {
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$arr[$name] = $value;
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}
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elseif (is_array($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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} 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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* 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 $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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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[$subElemName] = array ();
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ApiResult :: setElement($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 arrray 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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if ($arr === null || $tag === null || !is_array($arr) || is_array($tag))
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ApiBase :: dieDebug(__METHOD__, 'Bad parameter');
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// Do not use setElement() as it is ok to call this more than once
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$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, $tag)
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{
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if(!is_array($arr))
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return;
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foreach($arr as &$a)
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{
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if(!is_array($a))
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continue;
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$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 $p)
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$data = & $data[$p];
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if(is_null($data))
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return;
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$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 specifing 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) {
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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 > $wgAPIMaxResultSize)
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return false;
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$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[$p] = array ();
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$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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$data = & $data[$path];
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}
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}
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if (!$name)
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$data[] = $value; // Add list element
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else
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ApiResult :: setElement($data, $name, $value); // Add named element
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return 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[$p]))
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return;
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$data = & $data[$p];
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}
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$this->mSize -= self::size($data[$name]);
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unset($data[$name]);
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}
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/**
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* Ensure all values in this result are valid UTF-8.
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*/
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public function cleanUpUTF8()
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{
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array_walk_recursive($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(&$s)
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{
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if(!is_string($s))
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return;
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$s = UtfNormal::cleanUp($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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/* For compatibility with PHP versions < 5.1.0, define our own array_intersect_key function. */
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if (!function_exists('array_intersect_key')) {
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function array_intersect_key($isec, $keys) {
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$argc = func_num_args();
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if ($argc > 2) {
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for ($i = 1; $isec && $i < $argc; $i++) {
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$arr = func_get_arg($i);
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foreach (array_keys($isec) as $key) {
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if (!isset($arr[$key]))
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unset($isec[$key]);
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}
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}
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return $isec;
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} else {
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$res = array();
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foreach (array_keys($isec) as $key) {
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if (isset($keys[$key]))
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$res[$key] = $isec[$key];
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}
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return $res;
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}
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}
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}
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