includes/api/ApiFormatBase.php

   1 <?php
   2
   3
   4 /*
   5  * Created on Sep 19, 2006
   6  *
   7  * API for MediaWiki 1.8+
   8  *
   9  * Copyright (C) 2006 Yuri Astrakhan <FirstnameLastname@gmail.com>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License along
  22  * with this program; if not, write to the Free Software Foundation, Inc.,
  23  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  24  * http://www.gnu.org/copyleft/gpl.html
  25  */
  26
  27 if (!defined('MEDIAWIKI')) {
  28         // Eclipse helper - will be ignored in production
  29         require_once ('ApiBase.php');
  30 }
  31
  32 abstract class ApiFormatBase extends ApiBase {
  33
  34         private $mIsHtml, $mFormat;
  35
  36         /**
  37         * Constructor
  38         */
  39         public function __construct($main, $format) {
  40                 parent :: __construct($main, $format);
  41
  42                 $this->mIsHtml = (substr($format, -2, 2) === 'fm'); // ends with 'fm'
  43                 if ($this->mIsHtml)
  44                         $this->mFormat = substr($format, 0, -2); // remove ending 'fm'
  45                 else
  46                         $this->mFormat = $format;
  47                 $this->mFormat = strtoupper($this->mFormat);
  48         }
  49
  50         /**
  51          * Overriding class returns the mime type that should be sent to the client.
  52          * This method is not called if getIsHtml() returns true.
  53          * @return string
  54          */
  55         public abstract function getMimeType();
  56
  57         public function getNeedsRawData() {
  58                 return false;
  59         }
  60
  61         /**
  62          * Returns true when an HTML filtering printer should be used.
  63          * The default implementation assumes that formats ending with 'fm'
  64          * should be formatted in HTML.
  65          */
  66         public function getIsHtml() {
  67                 return $this->mIsHtml;
  68         }
  69
  70         /**
  71          * Initialize the printer function and prepares the output headers, etc.
  72          * This method must be the first outputing method during execution.
  73          * A help screen's header is printed for the HTML-based output
  74          */
  75         function initPrinter($isError) {
  76                 $isHtml = $this->getIsHtml();
  77                 $mime = $isHtml ? 'text/html' : $this->getMimeType();
  78
  79                 // Some printers (ex. Feed) do their own header settings,
  80                 // in which case $mime will be set to null
  81                 if (is_null($mime))
  82                         return; // skip any initialization
  83
  84                 header("Content-Type: $mime; charset=utf-8;");
  85
  86                 if ($isHtml) {
  87 ?>
  88 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
  89 <html>
  90 <head>
  91         <title>MediaWiki API</title>
  92 </head>
  93 <body>
  94 <?php
  95
  96
  97                         if (!$isError) {
  98 ?>
  99 <br/>
 100 <small>
 101 You are looking at the HTML representation of the <?=$this->mFormat?> format.<br/>
 102 HTML is good for debugging, but probably is not suitable for your application.<br/>
 103 Please see "format" parameter documentation at the <a href='api.php'>API help</a>
 104 for more information.
 105 </small>
 106 <?php
 107
 108
 109                         }
 110 ?>
 111 <pre>
 112 <?php
 113
 114
 115                 }
 116         }
 117
 118         /**
 119          * Finish printing. Closes HTML tags.
 120          */
 121         public function closePrinter() {
 122                 if ($this->getIsHtml()) {
 123 ?>
 124
 125 </pre>
 126 </body>
 127 </html>
 128 <?php
 129
 130
 131                 }
 132         }
 133
 134         public function printText($text) {
 135                 if ($this->getIsHtml())
 136                         echo $this->formatHTML($text);
 137                 else
 138                         echo $text;
 139         }
 140
 141         /**
 142         * Prety-print various elements in HTML format, such as xml tags and URLs.
 143         * This method also replaces any '<' with &lt;
 144         */
 145         protected function formatHTML($text) {
 146                 // encode all tags as safe blue strings
 147                 $text = ereg_replace('\<([^>]+)\>', '<span style="color:blue;">&lt;\1&gt;</span>', $text);
 148                 // identify URLs
 149                 $protos = "http|https|ftp|gopher";
 150                 $text = ereg_replace("($protos)://[^ '\"()<\n]+", '<a href="\\0">\\0</a>', $text);
 151                 // identify requests to api.php
 152                 $text = ereg_replace("api\\.php\\?[^ ()<\n\t]+", '<a href="\\0">\\0</a>', $text);
 153                 // make strings inside * bold
 154                 $text = ereg_replace("\\*[^<>\n]+\\*", '<b>\\0</b>', $text);
 155                 // make strings inside $ italic
 156                 $text = ereg_replace("\\$[^<>\n]+\\$", '<b><i>\\0</i></b>', $text);
 157
 158                 return $text;
 159         }
 160
 161         /**
 162          * Returns usage examples for this format.
 163          */
 164         protected function getExamples() {
 165                 return 'api.php?action=query&meta=siteinfo&siprop=namespaces&format=' . $this->getModuleName();
 166         }
 167
 168         protected function getDescription() {
 169                 return $this->getIsHtml() ? ' (pretty-print in HTML)' : '';
 170         }
 171
 172         public static function getBaseVersion() {
 173                 return __CLASS__ . ': $Id$';
 174         }
 175 }
 176
 177 /**
 178  * This printer is used to wrap an instance of the Feed class
 179  */
 180 class ApiFormatFeedWrapper extends ApiFormatBase {
 181
 182         public function __construct($main) {
 183                 parent :: __construct($main, 'feed');
 184         }
 185
 186         /**
 187          * Call this method to initialize output data
 188          */
 189         public static function setResult($result, $feed, $feedItems) {
 190                 // Store output in the Result data.
 191                 // This way we can check during execution if any error has occured
 192                 $data = & $result->getData();
 193                 $data['_feed'] = $feed;
 194                 $data['_feeditems'] = $feedItems;
 195         }
 196
 197         /**
 198          * Feed does its own headers
 199          */
 200         public function getMimeType() {
 201                 return null;
 202         }
 203
 204         /**
 205          * Optimization - no need to sanitize data that will not be needed
 206          */
 207         public function getNeedsRawData() {
 208                 return true;
 209         }
 210
 211         public function execute() {
 212                 $data = $this->getResultData();
 213                 if (isset ($data['_feed']) && isset ($data['_feeditems'])) {
 214                         $feed = $data['_feed'];
 215                         $items = $data['_feeditems'];
 216
 217                         $feed->outHeader();
 218                         foreach ($items as & $item)
 219                                 $feed->outItem($item);
 220                         $feed->outFooter();
 221                 } else {
 222                         // Error has occured, print something usefull
 223                         // TODO: make this error more informative using ApiBase :: dieDebug() or similar
 224                         wfHttpError(500, 'Internal Server Error', '');
 225                 }
 226         }
 227
 228         public function getVersion() {
 229                 return __CLASS__ . ': $Id$';
 230         }
 231 }
 232 ?>