includes/AjaxFunctions.php

   1 <?php
   2
   3 if( !defined( 'MEDIAWIKI' ) )
   4         die( 1 );
   5
   6 require_once('WebRequest.php');
   7
   8 /**
   9  * Function converts an Javascript escaped string back into a string with
  10  * specified charset (default is UTF-8).
  11  * Modified function from http://pure-essence.net/stuff/code/utf8RawUrlDecode.phps
  12  *
  13  * @param $source String escaped with Javascript's escape() function
  14  * @param $iconv_to String destination character set will be used as second paramether in the iconv function. Default is UTF-8.
  15  * @return string
  16  */
  17 function js_unescape($source, $iconv_to = 'UTF-8') {
  18    $decodedStr = '';
  19    $pos = 0;
  20    $len = strlen ($source);
  21    while ($pos < $len) {
  22        $charAt = substr ($source, $pos, 1);
  23        if ($charAt == '%') {
  24            $pos++;
  25            $charAt = substr ($source, $pos, 1);
  26            if ($charAt == 'u') {
  27                // we got a unicode character
  28                $pos++;
  29                $unicodeHexVal = substr ($source, $pos, 4);
  30                $unicode = hexdec ($unicodeHexVal);
  31                $decodedStr .= code2utf($unicode);
  32                $pos += 4;
  33            }
  34            else {
  35                // we have an escaped ascii character
  36                $hexVal = substr ($source, $pos, 2);
  37                $decodedStr .= chr (hexdec ($hexVal));
  38                $pos += 2;
  39            }
  40        }
  41        else {
  42            $decodedStr .= $charAt;
  43            $pos++;
  44        }
  45    }
  46
  47    if ($iconv_to != "UTF-8") {
  48        $decodedStr = iconv("UTF-8", $iconv_to, $decodedStr);
  49    }
  50
  51    return $decodedStr;
  52 }
  53
  54 /**
  55  * Function coverts number of utf char into that character.
  56  * Function taken from: http://sk2.php.net/manual/en/function.utf8-encode.php#49336
  57  *
  58  * @param $num Integer
  59  * @return utf8char
  60  */
  61 function code2utf($num){
  62    if ( $num<128 )
  63         return chr($num);
  64    if ( $num<2048 )
  65         return chr(($num>>6)+192).chr(($num&63)+128);
  66    if ( $num<65536 )
  67         return chr(($num>>12)+224).chr((($num>>6)&63)+128).chr(($num&63)+128);
  68    if ( $num<2097152 )
  69         return chr(($num>>18)+240).chr((($num>>12)&63)+128).chr((($num>>6)&63)+128) .chr(($num&63)+128);
  70    return '';
  71 }
  72
  73 function wfSajaxSearch( $term ) {
  74         global $wgContLang, $wgOut;
  75         $limit = 16;
  76
  77         $l = new Linker;
  78
  79         $term = str_replace( ' ', '_', $wgContLang->ucfirst(
  80                         $wgContLang->checkTitleEncoding( $wgContLang->recodeInput( js_unescape( $term ) ) )
  81                 ) );
  82
  83         if ( strlen( str_replace( '_', '', $term ) )<3 )
  84                 return;
  85
  86         $db =& wfGetDB( DB_SLAVE );
  87         $res = $db->select( 'page', 'page_title',
  88                         array(  'page_namespace' => 0,
  89                                 "page_title LIKE '". $db->strencode( $term) ."%'" ),
  90                                 "wfSajaxSearch",
  91                                 array( 'LIMIT' => $limit+1 )
  92                         );
  93
  94         $r = "";
  95
  96         $i=0;
  97         while ( ( $row = $db->fetchObject( $res ) ) && ( ++$i <= $limit ) ) {
  98                 $nt = Title::newFromDBkey( $row->page_title );
  99                 $r .= '<li>' . $l->makeKnownLinkObj( $nt ) . "</li>\n";
 100         }
 101         if ( $i > $limit ) {
 102                 $more = '<i>' .  $l->makeKnownLink( $wgContLang->specialPage( "Allpages" ),
 103                                                 wfMsg('moredotdotdot'),
 104                                                 "namespace=0&from=" . wfUrlEncode ( $term ) ) .
 105                         '</i>';
 106         } else {
 107                 $more = '';
 108         }
 109
 110         $subtitlemsg = ( Title::newFromText($term) ? 'searchsubtitle' : 'searchsubtitleinvalid' );
 111         $subtitle = $wgOut->parse( wfMsg( $subtitlemsg, wfEscapeWikiText($term) ) ); #FIXME: parser is missing mTitle !
 112
 113         $term = htmlspecialchars( $term );
 114         $html = '<div style="float:right; border:solid 1px black;background:gainsboro;padding:2px;"><a onclick="Searching_Hide_Results();">'
 115                 . wfMsg( 'hideresults' ) . '</a></div>'
 116                 . '<h1 class="firstHeading">'.wfMsg('search')
 117                 . '</h1><div id="contentSub">'. $subtitle . '</div><ul><li>'
 118                 . $l->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 119                                         wfMsg( 'searchcontaining', $term ),
 120                                         "search=$term&fulltext=Search" )
 121                 . '</li><li>' . $l->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 122                                         wfMsg( 'searchnamed', $term ) ,
 123                                         "search=$term&go=Go" )
 124                 . "</li></ul><h2>" . wfMsg( 'articletitles', $term ) . "</h2>"
 125                 . '<ul>' .$r .'</ul>'.$more;
 126
 127         $response = new AjaxResponse( $html );
 128
 129         $response->setCacheDuration( 30*60 );
 130
 131         return $response;
 132 }
 133
 134 ?>