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;
  78         $limit = 16;
  79
  80         $l = new Linker;
  81
  82         $term = str_replace( ' ', '_', $wgContLang->ucfirst(
  83                         $wgContLang->checkTitleEncoding( $wgContLang->recodeInput( js_unescape( $term ) ) )
  84                 ) );
  85
  86         if ( strlen( str_replace( '_', '', $term ) )<3 )
  87                 return;
  88
  89         $db = wfGetDB( DB_SLAVE );
  90         $res = $db->select( 'page', 'page_title',
  91                         array(  'page_namespace' => 0,
  92                                 "page_title LIKE '". $db->strencode( $term) ."%'" ),
  93                                 "wfSajaxSearch",
  94                                 array( 'LIMIT' => $limit+1 )
  95                         );
  96
  97         $r = "";
  98
  99         $i=0;
 100         while ( ( $row = $db->fetchObject( $res ) ) && ( ++$i <= $limit ) ) {
 101                 $nt = Title::newFromDBkey( $row->page_title );
 102                 $r .= '<li>' . $l->makeKnownLinkObj( $nt ) . "</li>\n";
 103         }
 104         if ( $i > $limit ) {
 105                 $more = '<i>' .  $l->makeKnownLink( $wgContLang->specialPage( "Allpages" ),
 106                                                 wfMsg('moredotdotdot'),
 107                                                 "namespace=0&from=" . wfUrlEncode ( $term ) ) .
 108                         '</i>';
 109         } else {
 110                 $more = '';
 111         }
 112
 113         $subtitlemsg = ( Title::newFromText($term) ? 'searchsubtitle' : 'searchsubtitleinvalid' );
 114         $subtitle = $wgOut->parse( wfMsg( $subtitlemsg, wfEscapeWikiText($term) ) ); #FIXME: parser is missing mTitle !
 115
 116         $term = urlencode( $term );
 117         $html = '<div style="float:right; border:solid 1px black;background:gainsboro;padding:2px;"><a onclick="Searching_Hide_Results();">'
 118                 . wfMsg( 'hideresults' ) . '</a></div>'
 119                 . '<h1 class="firstHeading">'.wfMsg('search')
 120                 . '</h1><div id="contentSub">'. $subtitle . '</div><ul><li>'
 121                 . $l->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 122                                         wfMsg( 'searchcontaining', $term ),
 123                                         "search=$term&fulltext=Search" )
 124                 . '</li><li>' . $l->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 125                                         wfMsg( 'searchnamed', $term ) ,
 126                                         "search=$term&go=Go" )
 127                 . "</li></ul><h2>" . wfMsg( 'articletitles', $term ) . "</h2>"
 128                 . '<ul>' .$r .'</ul>'.$more;
 129
 130         $response = new AjaxResponse( $html );
 131
 132         $response->setCacheDuration( 30*60 );
 133
 134         return $response;
 135 }
 136
 137 /**
 138  * Called for AJAX watch/unwatch requests.
 139  * @param $pagename Prefixed title string for page to watch/unwatch
 140  * @param $watch String 'w' to watch, 'u' to unwatch
 141  * @return String '<w#>' or '<u#>' on successful watch or unwatch,
 142  *   respectively, followed by an HTML message to display in the alert box; or
 143  *   '<err#>' on error
 144  */
 145 function wfAjaxWatch($pagename = "", $watch = "") {
 146         if(wfReadOnly()) {
 147                 // redirect to action=(un)watch, which will display the database lock
 148                 // message
 149                 return '<err#>';
 150         }
 151
 152         if('w' !== $watch && 'u' !== $watch) {
 153                 return '<err#>';
 154         }
 155         $watch = 'w' === $watch;
 156
 157         $title = Title::newFromText($pagename);
 158         if(!$title) {
 159                 // Invalid title
 160                 return '<err#>';
 161         }
 162         $article = new Article($title);
 163         $watching = $title->userIsWatching();
 164
 165         if($watch) {
 166                 if(!$watching) {
 167                         $dbw = wfGetDB(DB_MASTER);
 168                         $dbw->begin();
 169                         $article->doWatch();
 170                         $dbw->commit();
 171                 }
 172         } else {
 173                 if($watching) {
 174                         $dbw = wfGetDB(DB_MASTER);
 175                         $dbw->begin();
 176                         $article->doUnwatch();
 177                         $dbw->commit();
 178                 }
 179         }
 180         if( $watch ) {
 181                 return '<w#>'.wfMsgExt( 'addedwatchtext', array( 'parse' ), $title->getPrefixedText() );
 182         } else {
 183                 return '<u#>'.wfMsgExt( 'removedwatchtext', array( 'parse' ), $title->getPrefixedText() );
 184         }
 185 }
 186