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 class AjaxCachePolicy {
  72         var $policy;
  73
  74         function AjaxCachePolicy( $policy = null ) {
  75                 $this->policy = $policy;
  76         }
  77
  78         function setPolicy( $policy ) {
  79                 $this->policy = $policy;
  80         }
  81
  82         function writeHeader() {
  83                 header ("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
  84                 if ( is_null( $this->policy ) ) {
  85                         // Bust cache in the head
  86                         header ("Expires: Mon, 26 Jul 1997 05:00:00 GMT");    // Date in the past
  87                         // always modified
  88                         header ("Cache-Control: no-cache, must-revalidate");  // HTTP/1.1
  89                         header ("Pragma: no-cache");                          // HTTP/1.0
  90                 } else {
  91                         header ("Expires: " . gmdate( "D, d M Y H:i:s", time() + $this->policy ) . " GMT");
  92                         header ("Cache-Control: s-max-age={$this->policy},public,max-age={$this->policy}");
  93                 }
  94         }
  95 }
  96
  97
  98 function wfSajaxSearch( $term ) {
  99         global $wgContLang, $wgAjaxCachePolicy;
 100         $limit = 16;
 101
 102         $l = new Linker;
 103
 104         $term = str_replace( ' ', '_', $wgContLang->ucfirst(
 105                         $wgContLang->checkTitleEncoding( $wgContLang->recodeInput( js_unescape( $term ) ) )
 106                 ) );
 107
 108         if ( strlen( str_replace( '_', '', $term ) )<3 )
 109                 return;
 110
 111         $wgAjaxCachePolicy->setPolicy( 30*60 );
 112
 113         $db =& wfGetDB( DB_SLAVE );
 114         $res = $db->select( 'page', 'page_title',
 115                         array(  'page_namespace' => 0,
 116                                 "page_title LIKE '". $db->strencode( $term) ."%'" ),
 117                                 "wfSajaxSearch",
 118                                 array( 'LIMIT' => $limit+1 )
 119                         );
 120
 121         $r = "";
 122
 123         $i=0;
 124         while ( ( $row = $db->fetchObject( $res ) ) && ( ++$i <= $limit ) ) {
 125                 $nt = Title::newFromDBkey( $row->page_title );
 126                 $r .= '<li>' . $l->makeKnownLinkObj( $nt ) . "</li>\n";
 127         }
 128         if ( $i > $limit ) {
 129                 $more = '<i>' .  $l->makeKnownLink( $wgContLang->specialPage( "Allpages" ),
 130                                                 wfMsg('moredotdotdot'),
 131                                                 "namespace=0&from=" . wfUrlEncode ( $term ) ) .
 132                         '</i>';
 133         } else {
 134                 $more = '';
 135         }
 136
 137         $term = htmlspecialchars( $term );
 138         return '<div style="float:right; border:solid 1px black;background:gainsboro;padding:2px;"><a onclick="Searching_Hide_Results();">'
 139                 . wfMsg( 'hideresults' ) . '</a></div>'
 140                 . '<h1 class="firstHeading">'.wfMsg('search')
 141                 . '</h1><div id="contentSub">'.wfMsg('searchquery', $term) . '</div><ul><li>'
 142                 . $l->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 143                                         wfMsg( 'searchcontaining', $term ),
 144                                         "search=$term&fulltext=Search" )
 145                 . '</li><li>' . $l->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 146                                         wfMsg( 'searchnamed', $term ) ,
 147                                         "search=$term&go=Go" )
 148                 . "</li></ul><h2>" . wfMsg( 'articletitles', $term ) . "</h2>"
 149                 . '<ul>' .$r .'</ul>'.$more;
 150 }
 151
 152 ?>