includes/AjaxFunctions.php

   1 <?php
   2
   3 /**
   4  * @package MediaWiki
   5  * @addtogroup Ajax
   6  */
   7
   8 if( !defined( 'MEDIAWIKI' ) ) {
   9         die( 1 );
  10 }
  11
  12 /**
  13  * Function converts an Javascript escaped string back into a string with
  14  * specified charset (default is UTF-8).
  15  * Modified function from http://pure-essence.net/stuff/code/utf8RawUrlDecode.phps
  16  *
  17  * @param $source String escaped with Javascript's escape() function
  18  * @param $iconv_to String destination character set will be used as second paramether in the iconv function. Default is UTF-8.
  19  * @return string
  20  */
  21 function js_unescape($source, $iconv_to = 'UTF-8') {
  22         $decodedStr = '';
  23         $pos = 0;
  24         $len = strlen ($source);
  25
  26         while ($pos < $len) {
  27                 $charAt = substr ($source, $pos, 1);
  28                 if ($charAt == '%') {
  29                         $pos++;
  30                         $charAt = substr ($source, $pos, 1);
  31                         if ($charAt == 'u') {
  32                                 // we got a unicode character
  33                                 $pos++;
  34                                 $unicodeHexVal = substr ($source, $pos, 4);
  35                                 $unicode = hexdec ($unicodeHexVal);
  36                                 $decodedStr .= code2utf($unicode);
  37                                 $pos += 4;
  38                         } else {
  39                                 // we have an escaped ascii character
  40                                 $hexVal = substr ($source, $pos, 2);
  41                                 $decodedStr .= chr (hexdec ($hexVal));
  42                                 $pos += 2;
  43                         }
  44                 } else {
  45                         $decodedStr .= $charAt;
  46                         $pos++;
  47                 }
  48         }
  49
  50         if ($iconv_to != "UTF-8") {
  51                 $decodedStr = iconv("UTF-8", $iconv_to, $decodedStr);
  52         }
  53
  54         return $decodedStr;
  55 }
  56
  57 /**
  58  * Function coverts number of utf char into that character.
  59  * Function taken from: http://sk2.php.net/manual/en/function.utf8-encode.php#49336
  60  *
  61  * @param $num Integer
  62  * @return utf8char
  63  */
  64 function code2utf($num){
  65    if ( $num<128 )
  66         return chr($num);
  67    if ( $num<2048 )
  68         return chr(($num>>6)+192).chr(($num&63)+128);
  69    if ( $num<65536 )
  70         return chr(($num>>12)+224).chr((($num>>6)&63)+128).chr(($num&63)+128);
  71    if ( $num<2097152 )
  72         return chr(($num>>18)+240).chr((($num>>12)&63)+128).chr((($num>>6)&63)+128) .chr(($num&63)+128);
  73    return '';
  74 }
  75
  76 function wfSajaxSearch( $term ) {
  77         global $wgContLang, $wgOut, $wgUser, $wgCapitalLinks;
  78         $limit = 16;
  79         $sk = $wgUser->getSkin();
  80
  81         $term = trim( $term );
  82         $term = $wgContLang->checkTitleEncoding( $wgContLang->recodeInput( js_unescape( $term ) ) );
  83         if ( $wgCapitalLinks )
  84                 $term = $wgContLang->ucfirst( $term );
  85         $term_title = Title::newFromText( $term );
  86
  87         $r = $more = '';
  88         $canSearch = true;
  89         if( $term_title && $term_title->getNamespace() != NS_SPECIAL ) {
  90                 $db = wfGetDB( DB_SLAVE );
  91                 $res = $db->select( 'page', array( 'page_title', 'page_namespace' ),
  92                                 array(  'page_namespace' => $term_title->getNamespace(),
  93                                         "page_title LIKE '". $db->strencode( $term_title->getDBKey() ) ."%'" ),
  94                                         "wfSajaxSearch",
  95                                         array( 'LIMIT' => $limit+1 )
  96                                 );
  97
  98                 $i = 0;
  99                 while ( ( $row = $db->fetchObject( $res ) ) && ( ++$i <= $limit ) ) {
 100                         $nt = Title::makeTitle( $row->page_namespace, $row->page_title );
 101                         $r .= '<li>' . $sk->makeKnownLinkObj( $nt ) . "</li>\n";
 102                 }
 103                 if ( $i > $limit ) {
 104                         $more = '<i>' .  $sk->makeKnownLink( $wgContLang->specialPage( "Allpages" ),
 105                                                                                         wfMsg('moredotdotdot'),
 106                                                                                         "namespace=0&from=" . wfUrlEncode ( $term ) ) .
 107                                 '</i>';
 108                 }
 109         } else if( $term_title && $term_title->getNamespace() == NS_SPECIAL ) {
 110                 SpecialPage::initList();
 111                 SpecialPage::initAliasList();
 112                 $specialPages = array_merge(
 113                         array_keys( SpecialPage::$mList ),
 114                         array_keys( SpecialPage::$mAliases )
 115                 );
 116
 117                 foreach( $specialPages as $page ) {
 118                         if( $wgContLang->uc( $page ) != $page && strpos( $page, $term_title->getText() ) === 0 ) {
 119                                 $r .= '<li>' . $sk->makeKnownLinkObj( Title::makeTitle( NS_SPECIAL, $page ) ) . '</li>';
 120                         }
 121                 }
 122
 123                 $canSearch = false;
 124         }
 125
 126         $valid = (bool) $term_title;
 127         $term_url = urlencode( $term );
 128         $term_diplay = htmlspecialchars( $valid ? $term_title->getFullText() : $term );
 129         $subtitlemsg = ( $valid ? 'searchsubtitle' : 'searchsubtitleinvalid' );
 130         $subtitle = wfMsgWikiHtml( $subtitlemsg, $term_diplay );
 131         $html = '<div id="searchTargetHide"><a onclick="Searching_Hide_Results();">'
 132                 . wfMsgHtml( 'hideresults' ) . '</a></div>'
 133                 . '<h1 class="firstHeading">'.wfMsgHtml('search')
 134                 . '</h1><div id="contentSub">'. $subtitle . '</div>';
 135         if( $canSearch ) {
 136                 $html .= '<ul><li>'
 137                         . $sk->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 138                                                 wfMsgHtml( 'searchcontaining', $term_diplay ),
 139                                                 "search={$term_url}&fulltext=Search" )
 140                         . '</li><li>' . $sk->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 141                                                 wfMsgHtml( 'searchnamed', $term_diplay ) ,
 142                                                 "search={$term_url}&go=Go" )
 143                         . "</li></ul>";
 144         }
 145         if( $r ) {
 146                 $html .= "<h2>" . wfMsgHtml( 'articletitles', $term_diplay ) . "</h2>"
 147                         . '<ul>' .$r .'</ul>' . $more;
 148         }
 149
 150         $response = new AjaxResponse( $html );
 151
 152         $response->setCacheDuration( 30*60 );
 153
 154         return $response;
 155 }
 156
 157 /**
 158  * Called for AJAX watch/unwatch requests.
 159  * @param $pagename Prefixed title string for page to watch/unwatch
 160  * @param $watch String 'w' to watch, 'u' to unwatch
 161  * @return String '<w#>' or '<u#>' on successful watch or unwatch,
 162  *   respectively, followed by an HTML message to display in the alert box; or
 163  *   '<err#>' on error
 164  */
 165 function wfAjaxWatch($pagename = "", $watch = "") {
 166         if(wfReadOnly()) {
 167                 // redirect to action=(un)watch, which will display the database lock
 168                 // message
 169                 return '<err#>';
 170         }
 171
 172         if('w' !== $watch && 'u' !== $watch) {
 173                 return '<err#>';
 174         }
 175         $watch = 'w' === $watch;
 176
 177         $title = Title::newFromDBkey($pagename);
 178         if(!$title) {
 179                 // Invalid title
 180                 return '<err#>';
 181         }
 182         $article = new Article($title);
 183         $watching = $title->userIsWatching();
 184
 185         if($watch) {
 186                 if(!$watching) {
 187                         $dbw = wfGetDB(DB_MASTER);
 188                         $dbw->begin();
 189                         $article->doWatch();
 190                         $dbw->commit();
 191                 }
 192         } else {
 193                 if($watching) {
 194                         $dbw = wfGetDB(DB_MASTER);
 195                         $dbw->begin();
 196                         $article->doUnwatch();
 197                         $dbw->commit();
 198                 }
 199         }
 200         if( $watch ) {
 201                 return '<w#>'.wfMsgExt( 'addedwatchtext', array( 'parse' ), $title->getPrefixedText() );
 202         } else {
 203                 return '<u#>'.wfMsgExt( 'removedwatchtext', array( 'parse' ), $title->getPrefixedText() );
 204         }
 205 }
 206