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://www.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 define( 'AJAX_SEARCH_VERSION', 2 );     //AJAX search cache version
  77
  78 function wfSajaxSearch( $term ) {
  79         global $wgContLang, $wgOut, $wgUser, $wgCapitalLinks, $wgMemc;
  80         $limit = 16;
  81         $sk = $wgUser->getSkin();
  82         $output = '';
  83
  84         $term = trim( $term );
  85         $term = $wgContLang->checkTitleEncoding( $wgContLang->recodeInput( js_unescape( $term ) ) );
  86         if ( $wgCapitalLinks )
  87                 $term = $wgContLang->ucfirst( $term );
  88         $term_title = Title::newFromText( $term );
  89
  90         $memckey = $term_title ? wfMemcKey( 'ajaxsearch', md5( $term_title->getFullText() ) ) : wfMemcKey( 'ajaxsearch', md5( $term ) );
  91         $cached = $wgMemc->get($memckey);
  92         if( is_array( $cached ) && $cached['version'] == AJAX_SEARCH_VERSION ) {
  93                 $response = new AjaxResponse( $cached['html'] );
  94                 $response->setCacheDuration( 30*60 );
  95                 return $response;
  96         }
  97
  98         $r = $more = '';
  99         $canSearch = true;
 100
 101         $results = PrefixSearch::titleSearch( $term, $limit + 1 );
 102         foreach( array_slice( $results, 0, $limit ) as $titleText ) {
 103                 $r .= '<li>' . $sk->makeKnownLink( $titleText ) . "</li>\n";
 104         }
 105
 106         // Hack to check for specials
 107         if( $results ) {
 108                 $t = Title::newFromText( $results[0] );
 109                 if( $t && $t->getNamespace() == NS_SPECIAL ) {
 110                         $canSearch = false;
 111                         if( count( $results ) > $limit ) {
 112                                 $more = '<i>' .
 113                                         $sk->makeKnownLinkObj(
 114                                                 SpecialPage::getTitleFor( 'Specialpages' ),
 115                                                 wfMsgHtml( 'moredotdotdot' ) ) .
 116                                         '</i>';
 117                         }
 118                 } else {
 119                         if( count( $results ) > $limit ) {
 120                                 $more = '<i>' .
 121                                         $sk->makeKnownLinkObj(
 122                                                 SpecialPage::getTitleFor( "Allpages", $term ),
 123                                                 wfMsgHtml( 'moredotdotdot' ) ) .
 124                                         '</i>';
 125                         }
 126                 }
 127         }
 128
 129         $valid = (bool) $term_title;
 130         $term_url = urlencode( $term );
 131         $term_normalized = $valid ? $term_title->getFullText() : $term;
 132         $term_display = htmlspecialchars( $term );
 133         $subtitlemsg = ( $valid ? 'searchsubtitle' : 'searchsubtitleinvalid' );
 134         $subtitle = wfMsgExt( $subtitlemsg, array( 'parse' ), wfEscapeWikiText( $term_normalized ) );
 135         $html = '<div id="searchTargetHide"><a onclick="Searching_Hide_Results();">'
 136                 . wfMsgHtml( 'hideresults' ) . '</a></div>'
 137                 . '<h1 class="firstHeading">'.wfMsgHtml('search')
 138                 . '</h1><div id="contentSub">'. $subtitle . '</div>';
 139         if( $canSearch ) {
 140                 $html .= '<ul><li>'
 141                         . $sk->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 142                                                 wfMsgHtml( 'searchcontaining', $term_display ),
 143                                                 "search={$term_url}&fulltext=Search" )
 144                         . '</li><li>' . $sk->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 145                                                 wfMsgHtml( 'searchnamed', $term_display ) ,
 146                                                 "search={$term_url}&go=Go" )
 147                         . "</li></ul>";
 148         }
 149         if( $r ) {
 150                 $html .= "<h2>" . wfMsgHtml( 'articletitles', $term_display ) . "</h2>"
 151                         . '<ul>' .$r .'</ul>' . $more;
 152         }
 153
 154         $wgMemc->set( $memckey, array( 'version' => AJAX_SEARCH_VERSION, 'html' => $html ), 30 * 60 );
 155
 156         $response = new AjaxResponse( $html );
 157         $response->setCacheDuration( 30*60 );
 158         return $response;
 159 }
 160
 161 /**
 162  * Called for AJAX watch/unwatch requests.
 163  * @param $pagename Prefixed title string for page to watch/unwatch
 164  * @param $watch String 'w' to watch, 'u' to unwatch
 165  * @return String '<w#>' or '<u#>' on successful watch or unwatch,
 166  *   respectively, followed by an HTML message to display in the alert box; or
 167  *   '<err#>' on error
 168  */
 169 function wfAjaxWatch($pagename = "", $watch = "") {
 170         if(wfReadOnly()) {
 171                 // redirect to action=(un)watch, which will display the database lock
 172                 // message
 173                 return '<err#>';
 174         }
 175
 176         if('w' !== $watch && 'u' !== $watch) {
 177                 return '<err#>';
 178         }
 179         $watch = 'w' === $watch;
 180
 181         $title = Title::newFromDBkey($pagename);
 182         if(!$title) {
 183                 // Invalid title
 184                 return '<err#>';
 185         }
 186         $article = new Article($title);
 187         $watching = $title->userIsWatching();
 188
 189         if($watch) {
 190                 if(!$watching) {
 191                         $dbw = wfGetDB(DB_MASTER);
 192                         $dbw->begin();
 193                         $article->doWatch();
 194                         $dbw->commit();
 195                 }
 196         } else {
 197                 if($watching) {
 198                         $dbw = wfGetDB(DB_MASTER);
 199                         $dbw->begin();
 200                         $article->doUnwatch();
 201                         $dbw->commit();
 202                 }
 203         }
 204         if( $watch ) {
 205                 return '<w#>'.wfMsgExt( 'addedwatchtext', array( 'parse' ), $title->getPrefixedText() );
 206         } else {
 207                 return '<u#>'.wfMsgExt( 'removedwatchtext', array( 'parse' ), $title->getPrefixedText() );
 208         }
 209 }
 210