includes/AjaxFunctions.php

   1 <?php
   2 /**
   3  * @addtogroup Ajax
   4  */
   5
   6 if( !defined( 'MEDIAWIKI' ) ) {
   7         die( 1 );
   8 }
   9
  10 /**
  11  * Function converts an Javascript escaped string back into a string with
  12  * specified charset (default is UTF-8).
  13  * Modified function from http://pure-essence.net/stuff/code/utf8RawUrlDecode.phps
  14  *
  15  * @param $source String escaped with Javascript's escape() function
  16  * @param $iconv_to String destination character set will be used as second paramether in the iconv function. Default is UTF-8.
  17  * @return string
  18  */
  19 function js_unescape($source, $iconv_to = 'UTF-8') {
  20         $decodedStr = '';
  21         $pos = 0;
  22         $len = strlen ($source);
  23
  24         while ($pos < $len) {
  25                 $charAt = substr ($source, $pos, 1);
  26                 if ($charAt == '%') {
  27                         $pos++;
  28                         $charAt = substr ($source, $pos, 1);
  29                         if ($charAt == 'u') {
  30                                 // we got a unicode character
  31                                 $pos++;
  32                                 $unicodeHexVal = substr ($source, $pos, 4);
  33                                 $unicode = hexdec ($unicodeHexVal);
  34                                 $decodedStr .= code2utf($unicode);
  35                                 $pos += 4;
  36                         } else {
  37                                 // we have an escaped ascii character
  38                                 $hexVal = substr ($source, $pos, 2);
  39                                 $decodedStr .= chr (hexdec ($hexVal));
  40                                 $pos += 2;
  41                         }
  42                 } else {
  43                         $decodedStr .= $charAt;
  44                         $pos++;
  45                 }
  46         }
  47
  48         if ($iconv_to != "UTF-8") {
  49                 $decodedStr = iconv("UTF-8", $iconv_to, $decodedStr);
  50         }
  51
  52         return $decodedStr;
  53 }
  54
  55 /**
  56  * Function coverts number of utf char into that character.
  57  * Function taken from: http://www.php.net/manual/en/function.utf8-encode.php#49336
  58  *
  59  * @param $num Integer
  60  * @return utf8char
  61  */
  62 function code2utf($num){
  63    if ( $num<128 )
  64         return chr($num);
  65    if ( $num<2048 )
  66         return chr(($num>>6)+192).chr(($num&63)+128);
  67    if ( $num<65536 )
  68         return chr(($num>>12)+224).chr((($num>>6)&63)+128).chr(($num&63)+128);
  69    if ( $num<2097152 )
  70         return chr(($num>>18)+240).chr((($num>>12)&63)+128).chr((($num>>6)&63)+128) .chr(($num&63)+128);
  71    return '';
  72 }
  73
  74 define( 'AJAX_SEARCH_VERSION', 2 );     //AJAX search cache version
  75
  76 function wfSajaxSearch( $term ) {
  77         global $wgContLang, $wgOut, $wgUser, $wgCapitalLinks, $wgMemc;
  78         $limit = 16;
  79         $sk = $wgUser->getSkin();
  80         $output = '';
  81
  82         $term = trim( $term );
  83         $term = $wgContLang->checkTitleEncoding( $wgContLang->recodeInput( js_unescape( $term ) ) );
  84         if ( $wgCapitalLinks )
  85                 $term = $wgContLang->ucfirst( $term );
  86         $term_title = Title::newFromText( $term );
  87
  88         $memckey = $term_title ? wfMemcKey( 'ajaxsearch', md5( $term_title->getFullText() ) ) : wfMemcKey( 'ajaxsearch', md5( $term ) );
  89         $cached = $wgMemc->get($memckey);
  90         if( is_array( $cached ) && $cached['version'] == AJAX_SEARCH_VERSION ) {
  91                 $response = new AjaxResponse( $cached['html'] );
  92                 $response->setCacheDuration( 30*60 );
  93                 return $response;
  94         }
  95
  96         $r = $more = '';
  97         $canSearch = true;
  98
  99         $results = PrefixSearch::titleSearch( $term, $limit + 1 );
 100         foreach( array_slice( $results, 0, $limit ) as $titleText ) {
 101                 $r .= '<li>' . $sk->makeKnownLink( $titleText ) . "</li>\n";
 102         }
 103
 104         // Hack to check for specials
 105         if( $results ) {
 106                 $t = Title::newFromText( $results[0] );
 107                 if( $t && $t->getNamespace() == NS_SPECIAL ) {
 108                         $canSearch = false;
 109                         if( count( $results ) > $limit ) {
 110                                 $more = '<i>' .
 111                                         $sk->makeKnownLinkObj(
 112                                                 SpecialPage::getTitleFor( 'Specialpages' ),
 113                                                 wfMsgHtml( 'moredotdotdot' ) ) .
 114                                         '</i>';
 115                         }
 116                 } else {
 117                         if( count( $results ) > $limit ) {
 118                                 $more = '<i>' .
 119                                         $sk->makeKnownLinkObj(
 120                                                 SpecialPage::getTitleFor( "Allpages", $term ),
 121                                                 wfMsgHtml( 'moredotdotdot' ) ) .
 122                                         '</i>';
 123                         }
 124                 }
 125         }
 126
 127         $valid = (bool) $term_title;
 128         $term_url = urlencode( $term );
 129         $term_normalized = $valid ? $term_title->getFullText() : $term;
 130         $term_display = htmlspecialchars( $term );
 131         $subtitlemsg = ( $valid ? 'searchsubtitle' : 'searchsubtitleinvalid' );
 132         $subtitle = wfMsgExt( $subtitlemsg, array( 'parse' ), wfEscapeWikiText( $term_normalized ) );
 133         $html = '<div id="searchTargetHide"><a onclick="Searching_Hide_Results();">'
 134                 . wfMsgHtml( 'hideresults' ) . '</a></div>'
 135                 . '<h1 class="firstHeading">'.wfMsgHtml('search')
 136                 . '</h1><div id="contentSub">'. $subtitle . '</div>';
 137         if( $canSearch ) {
 138                 $html .= '<ul><li>'
 139                         . $sk->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 140                                                 wfMsgHtml( 'searchcontaining', $term_display ),
 141                                                 "search={$term_url}&fulltext=Search" )
 142                         . '</li><li>' . $sk->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 143                                                 wfMsgHtml( 'searchnamed', $term_display ) ,
 144                                                 "search={$term_url}&go=Go" )
 145                         . "</li></ul>";
 146         }
 147         if( $r ) {
 148                 $html .= "<h2>" . wfMsgHtml( 'articletitles', $term_display ) . "</h2>"
 149                         . '<ul>' .$r .'</ul>' . $more;
 150         }
 151
 152         $wgMemc->set( $memckey, array( 'version' => AJAX_SEARCH_VERSION, 'html' => $html ), 30 * 60 );
 153
 154         $response = new AjaxResponse( $html );
 155         $response->setCacheDuration( 30*60 );
 156         return $response;
 157 }
 158
 159 /**
 160  * Called for AJAX watch/unwatch requests.
 161  * @param $pagename Prefixed title string for page to watch/unwatch
 162  * @param $watch String 'w' to watch, 'u' to unwatch
 163  * @return String '<w#>' or '<u#>' on successful watch or unwatch,
 164  *   respectively, followed by an HTML message to display in the alert box; or
 165  *   '<err#>' on error
 166  */
 167 function wfAjaxWatch($pagename = "", $watch = "") {
 168         if(wfReadOnly()) {
 169                 // redirect to action=(un)watch, which will display the database lock
 170                 // message
 171                 return '<err#>';
 172         }
 173
 174         if('w' !== $watch && 'u' !== $watch) {
 175                 return '<err#>';
 176         }
 177         $watch = 'w' === $watch;
 178
 179         $title = Title::newFromDBkey($pagename);
 180         if(!$title) {
 181                 // Invalid title
 182                 return '<err#>';
 183         }
 184         $article = new Article($title);
 185         $watching = $title->userIsWatching();
 186
 187         if($watch) {
 188                 if(!$watching) {
 189                         $dbw = wfGetDB(DB_MASTER);
 190                         $dbw->begin();
 191                         $article->doWatch();
 192                         $dbw->commit();
 193                 }
 194         } else {
 195                 if($watching) {
 196                         $dbw = wfGetDB(DB_MASTER);
 197                         $dbw->begin();
 198                         $article->doUnwatch();
 199                         $dbw->commit();
 200                 }
 201         }
 202         if( $watch ) {
 203                 return '<w#>'.wfMsgExt( 'addedwatchtext', array( 'parse' ), $title->getPrefixedText() );
 204         } else {
 205                 return '<u#>'.wfMsgExt( 'removedwatchtext', array( 'parse' ), $title->getPrefixedText() );
 206         }
 207 }