includes/AjaxFunctions.php

   1 <?php
   2
   3 if( !defined( 'MEDIAWIKI' ) )
   4         die( 1 );
   5
   6 /**
   7  * Function converts an Javascript escaped string back into a string with
   8  * specified charset (default is UTF-8).
   9  * Modified function from http://pure-essence.net/stuff/code/utf8RawUrlDecode.phps
  10  *
  11  * @param $source String escaped with Javascript's escape() function
  12  * @param $iconv_to String destination character set will be used as second paramether in the iconv function. Default is UTF-8.
  13  * @return string
  14  */
  15 function js_unescape($source, $iconv_to = 'UTF-8') {
  16    $decodedStr = '';
  17    $pos = 0;
  18    $len = strlen ($source);
  19    while ($pos < $len) {
  20        $charAt = substr ($source, $pos, 1);
  21        if ($charAt == '%') {
  22            $pos++;
  23            $charAt = substr ($source, $pos, 1);
  24            if ($charAt == 'u') {
  25                // we got a unicode character
  26                $pos++;
  27                $unicodeHexVal = substr ($source, $pos, 4);
  28                $unicode = hexdec ($unicodeHexVal);
  29                $decodedStr .= code2utf($unicode);
  30                $pos += 4;
  31            }
  32            else {
  33                // we have an escaped ascii character
  34                $hexVal = substr ($source, $pos, 2);
  35                $decodedStr .= chr (hexdec ($hexVal));
  36                $pos += 2;
  37            }
  38        }
  39        else {
  40            $decodedStr .= $charAt;
  41            $pos++;
  42        }
  43    }
  44
  45    if ($iconv_to != "UTF-8") {
  46        $decodedStr = iconv("UTF-8", $iconv_to, $decodedStr);
  47    }
  48
  49    return $decodedStr;
  50 }
  51
  52 /**
  53  * Function coverts number of utf char into that character.
  54  * Function taken from: http://sk2.php.net/manual/en/function.utf8-encode.php#49336
  55  *
  56  * @param $num Integer
  57  * @return utf8char
  58  */
  59 function code2utf($num){
  60    if ( $num<128 )
  61         return chr($num);
  62    if ( $num<2048 )
  63         return chr(($num>>6)+192).chr(($num&63)+128);
  64    if ( $num<65536 )
  65         return chr(($num>>12)+224).chr((($num>>6)&63)+128).chr(($num&63)+128);
  66    if ( $num<2097152 )
  67         return chr(($num>>18)+240).chr((($num>>12)&63)+128).chr((($num>>6)&63)+128) .chr(($num&63)+128);
  68    return '';
  69 }
  70
  71 function wfSajaxSearch( $term ) {
  72         global $wgContLang, $wgOut;
  73         $limit = 16;
  74
  75         $l = new Linker;
  76
  77         $term = str_replace( ' ', '_', $wgContLang->ucfirst(
  78                         $wgContLang->checkTitleEncoding( $wgContLang->recodeInput( js_unescape( $term ) ) )
  79                 ) );
  80
  81         if ( strlen( str_replace( '_', '', $term ) )<3 )
  82                 return;
  83
  84         $db =& wfGetDB( DB_SLAVE );
  85         $res = $db->select( 'page', 'page_title',
  86                         array(  'page_namespace' => 0,
  87                                 "page_title LIKE '". $db->strencode( $term) ."%'" ),
  88                                 "wfSajaxSearch",
  89                                 array( 'LIMIT' => $limit+1 )
  90                         );
  91
  92         $r = "";
  93
  94         $i=0;
  95         while ( ( $row = $db->fetchObject( $res ) ) && ( ++$i <= $limit ) ) {
  96                 $nt = Title::newFromDBkey( $row->page_title );
  97                 $r .= '<li>' . $l->makeKnownLinkObj( $nt ) . "</li>\n";
  98         }
  99         if ( $i > $limit ) {
 100                 $more = '<i>' .  $l->makeKnownLink( $wgContLang->specialPage( "Allpages" ),
 101                                                 wfMsg('moredotdotdot'),
 102                                                 "namespace=0&from=" . wfUrlEncode ( $term ) ) .
 103                         '</i>';
 104         } else {
 105                 $more = '';
 106         }
 107
 108         $subtitlemsg = ( Title::newFromText($term) ? 'searchsubtitle' : 'searchsubtitleinvalid' );
 109         $subtitle = $wgOut->parse( wfMsg( $subtitlemsg, wfEscapeWikiText($term) ) ); #FIXME: parser is missing mTitle !
 110
 111         $term = urlencode( $term );
 112         $html = '<div style="float:right; border:solid 1px black;background:gainsboro;padding:2px;"><a onclick="Searching_Hide_Results();">'
 113                 . wfMsg( 'hideresults' ) . '</a></div>'
 114                 . '<h1 class="firstHeading">'.wfMsg('search')
 115                 . '</h1><div id="contentSub">'. $subtitle . '</div><ul><li>'
 116                 . $l->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 117                                         wfMsg( 'searchcontaining', $term ),
 118                                         "search=$term&fulltext=Search" )
 119                 . '</li><li>' . $l->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 120                                         wfMsg( 'searchnamed', $term ) ,
 121                                         "search=$term&go=Go" )
 122                 . "</li></ul><h2>" . wfMsg( 'articletitles', $term ) . "</h2>"
 123                 . '<ul>' .$r .'</ul>'.$more;
 124
 125         $response = new AjaxResponse( $html );
 126
 127         $response->setCacheDuration( 30*60 );
 128
 129         return $response;
 130 }
 131
 132 /**
 133  * Called for AJAX watch/unwatch requests.
 134  * @param $pageID Integer ID of the page to be watched/unwatched
 135  * @param $watch String 'w' to watch, 'u' to unwatch
 136  * @return String '<w#>' or '<u#>' on successful watch or unwatch, respectively, or '<err#>' on error (invalid XML in case we want to add HTML sometime)
 137  */
 138 function wfAjaxWatch($pageID = "", $watch = "") {
 139         if(wfReadOnly())
 140                 return '<err#>'; // redirect to action=(un)watch, which will display the database lock message
 141
 142         if(('w' !== $watch && 'u' !== $watch) || !is_numeric($pageID))
 143                 return '<err#>';
 144         $watch = 'w' === $watch;
 145         $pageID = intval($pageID);
 146
 147         $title = Title::newFromID($pageID);
 148         if(!$title)
 149                 return '<err#>';
 150         $article = new Article($title);
 151         $watching = $title->userIsWatching();
 152
 153         if($watch) {
 154                 if(!$watching) {
 155                         $dbw =& wfGetDB(DB_MASTER);
 156                         $dbw->begin();
 157                         $article->doWatch();
 158                         $dbw->commit();
 159                 }
 160         } else {
 161                 if($watching) {
 162                         $dbw =& wfGetDB(DB_MASTER);
 163                         $dbw->begin();
 164                         $article->doUnwatch();
 165                         $dbw->commit();
 166                 }
 167         }
 168
 169         return $watch ? '<w#>' : '<u#>';
 170 }
 171 ?>