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<?php
/*
* Created on Sep 19, 2006
*
* API for MediaWiki 1.8+
*
* Copyright (C) 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
* http://www.gnu.org/copyleft/gpl.html
*/
if (!defined('MEDIAWIKI')) {
// Eclipse helper - will be ignored in production
require_once ('ApiBase.php');
}
/**
* This is the abstract base class for API formatters.
*
* @ingroup API
*/
abstract class ApiFormatBase extends ApiBase {
private $mIsHtml, $mFormat, $mUnescapeAmps, $mHelp, $mCleared;
/**
* Create a new instance of the formatter.
* If the format name ends with 'fm', wrap its output in the proper HTML.
*/
public function __construct($main, $format) {
parent :: __construct($main, $format);
$this->mIsHtml = (substr($format, -2, 2) === 'fm'); // ends with 'fm'
if ($this->mIsHtml)
$this->mFormat = substr($format, 0, -2); // remove ending 'fm'
else
$this->mFormat = $format;
$this->mFormat = strtoupper($this->mFormat);
$this->mCleared = false;
}
/**
* Overriding class returns the mime type that should be sent to the client.
* This method is not called if getIsHtml() returns true.
* @return string
*/
public abstract function getMimeType();
/**
* If formatter outputs data results as is, the results must first be sanitized.
* An XML formatter on the other hand uses special tags, such as "_element" for special handling,
* and thus needs to override this function to return true.
*/
public function getNeedsRawData() {
return false;
}
/**
* Get the internal format name
*/
public function getFormat() {
return $this->mFormat;
}
/**
* Specify whether or not ampersands should be escaped to '&' when rendering. This
* should only be set to true for the help message when rendered in the default (xmlfm)
* format. This is a temporary special-case fix that should be removed once the help
* has been reworked to use a fully html interface.
*
* @param boolean Whether or not ampersands should be escaped.
*/
public function setUnescapeAmps ( $b ) {
$this->mUnescapeAmps = $b;
}
/**
* Returns true when an HTML filtering printer should be used.
* The default implementation assumes that formats ending with 'fm'
* should be formatted in HTML.
*/
public function getIsHtml() {
return $this->mIsHtml;
}
/**
* Initialize the printer function and prepares the output headers, etc.
* This method must be the first outputing method during execution.
* A help screen's header is printed for the HTML-based output
*/
function initPrinter($isError) {
$isHtml = $this->getIsHtml();
$mime = $isHtml ? 'text/html' : $this->getMimeType();
$script = wfScript( 'api' );
// Some printers (ex. Feed) do their own header settings,
// in which case $mime will be set to null
if (is_null($mime))
return; // skip any initialization
header("Content-Type: $mime; charset=utf-8");
if ($isHtml) {
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<?php if ($this->mUnescapeAmps) {
?> <title>MediaWiki API</title>
<?php } else {
?> <title>MediaWiki API Result</title>
<?php } ?>
</head>
<body>
<?php
if( !$isError ) {
?>
<br/>
<small>
You are looking at the HTML representation of the <?php echo( $this->mFormat ); ?> format.<br/>
HTML is good for debugging, but probably is not suitable for your application.<br/>
See <a href='http://www.mediawiki.org/wiki/API'>complete documentation</a>, or
<a href='<?php echo( $script ); ?>'>API help</a> for more information.
</small>
<?php
}
?>
<pre>
<?php
}
}
/**
* Finish printing. Closes HTML tags.
*/
public function closePrinter() {
if ($this->getIsHtml()) {
?>
</pre>
</body>
</html>
<?php
}
}
/**
* The main format printing function. Call it to output the result string to the user.
* This function will automatically output HTML when format name ends in 'fm'.
*/
public function printText($text) {
if ($this->getIsHtml())
echo $this->formatHTML($text);
else
{
// For non-HTML output, clear all errors that might have been
// displayed if display_errors=On
// Do this only once, of course
if(!$this->mCleared)
{
ob_clean();
$this->mCleared = true;
}
echo $text;
}
}
/**
* Says pretty-printer that it should use *bold* and $italics$ formatting
*/
public function setHelp( $help = true ) {
$this->mHelp = true;
}
/**
* Prety-print various elements in HTML format, such as xml tags and URLs.
* This method also replaces any '<' with <
*/
protected function formatHTML($text) {
global $wgUrlProtocols;
// Escape everything first for full coverage
$text = htmlspecialchars($text);
// encode all comments or tags as safe blue strings
$text = preg_replace('/\<(!--.*?--|.*?)\>/', '<span style="color:blue;"><\1></span>', $text);
// identify URLs
$protos = implode("|", $wgUrlProtocols);
# This regex hacks around bug 13218 (" included in the URL)
$text = preg_replace("#(($protos).*?)(")?([ \\'\"()<\n])#", '<a href="\\1">\\1</a>\\3\\4', $text);
// identify requests to api.php
$text = preg_replace("#api\\.php\\?[^ \\()<\n\t]+#", '<a href="\\0">\\0</a>', $text);
if( $this->mHelp ) {
// make strings inside * bold
$text = ereg_replace("\\*[^<>\n]+\\*", '<b>\\0</b>', $text);
// make strings inside $ italic
$text = ereg_replace("\\$[^<>\n]+\\$", '<b><i>\\0</i></b>', $text);
}
/* Temporary fix for bad links in help messages. As a special case,
* XML-escaped metachars are de-escaped one level in the help message
* for legibility. Should be removed once we have completed a fully-html
* version of the help message. */
if ( $this->mUnescapeAmps )
$text = preg_replace( '/&(amp|quot|lt|gt);/', '&\1;', $text );
return $text;
}
/**
* Returns usage examples for this format.
*/
protected function getExamples() {
return 'api.php?action=query&meta=siteinfo&siprop=namespaces&format=' . $this->getModuleName();
}
public function getDescription() {
return $this->getIsHtml() ? ' (pretty-print in HTML)' : '';
}
public static function getBaseVersion() {
return __CLASS__ . ': $Id: ApiFormatBase.php 43470 2008-11-14 00:30:34Z tstarling $';
}
}
/**
* This printer is used to wrap an instance of the Feed class
* @ingroup API
*/
class ApiFormatFeedWrapper extends ApiFormatBase {
public function __construct($main) {
parent :: __construct($main, 'feed');
}
/**
* Call this method to initialize output data. See self::execute()
*/
public static function setResult($result, $feed, $feedItems) {
// Store output in the Result data.
// This way we can check during execution if any error has occured
$data = & $result->getData();
$data['_feed'] = $feed;
$data['_feeditems'] = $feedItems;
}
/**
* Feed does its own headers
*/
public function getMimeType() {
return null;
}
/**
* Optimization - no need to sanitize data that will not be needed
*/
public function getNeedsRawData() {
return true;
}
/**
* This class expects the result data to be in a custom format set by self::setResult()
* $result['_feed'] - an instance of one of the $wgFeedClasses classes
* $result['_feeditems'] - an array of FeedItem instances
*/
public function execute() {
$data = $this->getResultData();
if (isset ($data['_feed']) && isset ($data['_feeditems'])) {
$feed = $data['_feed'];
$items = $data['_feeditems'];
$feed->outHeader();
foreach ($items as & $item)
$feed->outItem($item);
$feed->outFooter();
} else {
// Error has occured, print something useful
ApiBase::dieDebug( __METHOD__, 'Invalid feed class/item' );
}
}
public function getVersion() {
return __CLASS__ . ': $Id: ApiFormatBase.php 43470 2008-11-14 00:30:34Z tstarling $';
}
}
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