includes/AjaxFunctions.php

   1 <?php
   2 /**
   3  * @file
   4  * @ingroup Ajax
   5  */
   6
   7 if( !defined( 'MEDIAWIKI' ) ) {
   8         die( 1 );
   9 }
  10
  11 /**
  12  * Function converts an Javascript escaped string back into a string with
  13  * specified charset (default is UTF-8).
  14  * Modified function from http://pure-essence.net/stuff/code/utf8RawUrlDecode.phps
  15  *
  16  * @param $source String escaped with Javascript's escape() function
  17  * @param $iconv_to String destination character set will be used as second paramether in the iconv function. Default is UTF-8.
  18  * @return string
  19  */
  20 function js_unescape($source, $iconv_to = 'UTF-8') {
  21         $decodedStr = '';
  22         $pos = 0;
  23         $len = strlen ($source);
  24
  25         while ($pos < $len) {
  26                 $charAt = substr ($source, $pos, 1);
  27                 if ($charAt == '%') {
  28                         $pos++;
  29                         $charAt = substr ($source, $pos, 1);
  30                         if ($charAt == 'u') {
  31                                 // we got a unicode character
  32                                 $pos++;
  33                                 $unicodeHexVal = substr ($source, $pos, 4);
  34                                 $unicode = hexdec ($unicodeHexVal);
  35                                 $decodedStr .= code2utf($unicode);
  36                                 $pos += 4;
  37                         } else {
  38                                 // we have an escaped ascii character
  39                                 $hexVal = substr ($source, $pos, 2);
  40                                 $decodedStr .= chr (hexdec ($hexVal));
  41                                 $pos += 2;
  42                         }
  43                 } else {
  44                         $decodedStr .= $charAt;
  45                         $pos++;
  46                 }
  47         }
  48
  49         if ($iconv_to != "UTF-8") {
  50                 $decodedStr = iconv("UTF-8", $iconv_to, $decodedStr);
  51         }
  52
  53         return $decodedStr;
  54 }
  55
  56 /**
  57  * Function coverts number of utf char into that character.
  58  * Function taken from: http://www.php.net/manual/en/function.utf8-encode.php#49336
  59  *
  60  * @param $num Integer
  61  * @return utf8char
  62  */
  63 function code2utf($num){
  64    if ( $num<128 )
  65         return chr($num);
  66    if ( $num<2048 )
  67         return chr(($num>>6)+192).chr(($num&63)+128);
  68    if ( $num<65536 )
  69         return chr(($num>>12)+224).chr((($num>>6)&63)+128).chr(($num&63)+128);
  70    if ( $num<2097152 )
  71         return chr(($num>>18)+240).chr((($num>>12)&63)+128).chr((($num>>6)&63)+128) .chr(($num&63)+128);
  72    return '';
  73 }
  74
  75 define( 'AJAX_SEARCH_VERSION', 2 );     //AJAX search cache version
  76
  77 function wfSajaxSearch( $term ) {
  78         global $wgContLang, $wgUser, $wgMemc;
  79         $limit = 16;
  80         $sk = $wgUser->getSkin();
  81         $output = '';
  82
  83         $term = trim( $term );
  84         $term = $wgContLang->checkTitleEncoding( $wgContLang->recodeInput( js_unescape( $term ) ) );
  85         $term_title = Title::newFromText( $term );
  86
  87         $memckey = $term_title ? wfMemcKey( 'ajaxsearch', md5( $term_title->getFullText() ) ) : wfMemcKey( 'ajaxsearch', md5( $term ) );
  88         $cached = $wgMemc->get($memckey);
  89         if( is_array( $cached ) && $cached['version'] == AJAX_SEARCH_VERSION ) {
  90                 $response = new AjaxResponse( $cached['html'] );
  91                 $response->setCacheDuration( 30*60 );
  92                 return $response;
  93         }
  94
  95         $r = $more = '';
  96         $canSearch = true;
  97
  98         $results = PrefixSearch::titleSearch( $term, $limit + 1 );
  99         foreach( array_slice( $results, 0, $limit ) as $titleText ) {
 100                 $r .= '<li>' . $sk->makeKnownLink( $titleText ) . "</li>\n";
 101         }
 102
 103         // Hack to check for specials
 104         if( $results ) {
 105                 $t = Title::newFromText( $results[0] );
 106                 if( $t && $t->getNamespace() == NS_SPECIAL ) {
 107                         $canSearch = false;
 108                         if( count( $results ) > $limit ) {
 109                                 $more = '<i>' .
 110                                         $sk->makeKnownLinkObj(
 111                                                 SpecialPage::getTitleFor( 'Specialpages' ),
 112                                                 wfMsgHtml( 'moredotdotdot' ) ) .
 113                                         '</i>';
 114                         }
 115                 } else {
 116                         if( count( $results ) > $limit ) {
 117                                 $more = '<i>' .
 118                                         $sk->makeKnownLinkObj(
 119                                                 SpecialPage::getTitleFor( "Allpages", $term ),
 120                                                 wfMsgHtml( 'moredotdotdot' ) ) .
 121                                         '</i>';
 122                         }
 123                 }
 124         }
 125
 126         $valid = (bool) $term_title;
 127         $term_url = urlencode( $term );
 128         $term_normalized = $valid ? $term_title->getFullText() : $term;
 129         $term_display = htmlspecialchars( $term );
 130         $subtitlemsg = ( $valid ? 'searchsubtitle' : 'searchsubtitleinvalid' );
 131         $subtitle = wfMsgExt( $subtitlemsg, array( 'parse' ), wfEscapeWikiText( $term_normalized ) );
 132         $html = '<div id="searchTargetHide"><a onclick="Searching_Hide_Results();">'
 133                 . wfMsgHtml( 'hideresults' ) . '</a></div>'
 134                 . '<h1 class="firstHeading">'.wfMsgHtml('search')
 135                 . '</h1><div id="contentSub">'. $subtitle . '</div>';
 136         if( $canSearch ) {
 137                 $html .= '<ul><li>'
 138                         . $sk->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 139                                                 wfMsgHtml( 'searchcontaining', $term_display ),
 140                                                 "search={$term_url}&fulltext=Search" )
 141                         . '</li><li>' . $sk->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 142                                                 wfMsgHtml( 'searchnamed', $term_display ) ,
 143                                                 "search={$term_url}&go=Go" )
 144                         . "</li></ul>";
 145         }
 146         if( $r ) {
 147                 $html .= "<h2>" . wfMsgHtml( 'articletitles', $term_display ) . "</h2>"
 148                         . '<ul>' .$r .'</ul>' . $more;
 149         }
 150
 151         $wgMemc->set( $memckey, array( 'version' => AJAX_SEARCH_VERSION, 'html' => $html ), 30 * 60 );
 152
 153         $response = new AjaxResponse( $html );
 154         $response->setCacheDuration( 30*60 );
 155         return $response;
 156 }
 157
 158 /**
 159  * Called for AJAX watch/unwatch requests.
 160  * @param $pagename Prefixed title string for page to watch/unwatch
 161  * @param $watch String 'w' to watch, 'u' to unwatch
 162  * @return String '<w#>' or '<u#>' on successful watch or unwatch,
 163  *   respectively, followed by an HTML message to display in the alert box; or
 164  *   '<err#>' on error
 165  */
 166 function wfAjaxWatch($pagename = "", $watch = "") {
 167         if(wfReadOnly()) {
 168                 // redirect to action=(un)watch, which will display the database lock
 169                 // message
 170                 return '<err#>';
 171         }
 172
 173         if('w' !== $watch && 'u' !== $watch) {
 174                 return '<err#>';
 175         }
 176         $watch = 'w' === $watch;
 177
 178         $title = Title::newFromDBkey($pagename);
 179         if(!$title) {
 180                 // Invalid title
 181                 return '<err#>';
 182         }
 183         $article = new Article($title);
 184         $watching = $title->userIsWatching();
 185
 186         if($watch) {
 187                 if(!$watching) {
 188                         $dbw = wfGetDB(DB_MASTER);
 189                         $dbw->begin();
 190                         $article->doWatch();
 191                         $dbw->commit();
 192                 }
 193         } else {
 194                 if($watching) {
 195                         $dbw = wfGetDB(DB_MASTER);
 196                         $dbw->begin();
 197                         $article->doUnwatch();
 198                         $dbw->commit();
 199                 }
 200         }
 201         if( $watch ) {
 202                 return '<w#>'.wfMsgExt( 'addedwatchtext', array( 'parse' ), $title->getPrefixedText() );
 203         } else {
 204                 return '<u#>'.wfMsgExt( 'removedwatchtext', array( 'parse' ), $title->getPrefixedText() );
 205         }
 206 }