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 specified charset (default is UTF-8).
  10  * Modified function from http://pure-essence.net/stuff/code/utf8RawUrlDecode.phps
  11  *
  12  * @param string $source escaped with Javascript's escape() function
  13  * @param string $iconv_to destination character set will be used as second paramether in the iconv function. Default is UTF-8.
  14  * @return string
  15  */
  16 function js_unescape($source, $iconv_to = 'UTF-8') {
  17    $decodedStr = '';
  18    $pos = 0;
  19    $len = strlen ($source);
  20    while ($pos < $len) {
  21        $charAt = substr ($source, $pos, 1);
  22        if ($charAt == '%') {
  23            $pos++;
  24            $charAt = substr ($source, $pos, 1);
  25            if ($charAt == 'u') {
  26                // we got a unicode character
  27                $pos++;
  28                $unicodeHexVal = substr ($source, $pos, 4);
  29                $unicode = hexdec ($unicodeHexVal);
  30                $decodedStr .= code2utf($unicode);
  31                $pos += 4;
  32            }
  33            else {
  34                // we have an escaped ascii character
  35                $hexVal = substr ($source, $pos, 2);
  36                $decodedStr .= chr (hexdec ($hexVal));
  37                $pos += 2;
  38            }
  39        }
  40        else {
  41            $decodedStr .= $charAt;
  42            $pos++;
  43        }
  44    }
  45
  46    if ($iconv_to != "UTF-8") {
  47        $decodedStr = iconv("UTF-8", $iconv_to, $decodedStr);
  48    }
  49
  50    return $decodedStr;
  51 }
  52
  53 /**
  54  * Function coverts number of utf char into that character.
  55  * Function taken from: http://sk2.php.net/manual/en/function.utf8-encode.php#49336
  56  *
  57  * @param int $num
  58  * @return utf8char
  59  */
  60 function code2utf($num){
  61    if ( $num<128 )
  62         return chr($num);
  63    if ( $num<2048 )
  64         return chr(($num>>6)+192).chr(($num&63)+128);
  65    if ( $num<65536 )
  66         return chr(($num>>12)+224).chr((($num>>6)&63)+128).chr(($num&63)+128);
  67    if ( $num<2097152 )
  68         return chr(($num>>18)+240).chr((($num>>12)&63)+128).chr((($num>>6)&63)+128) .chr(($num&63)+128);
  69    return '';
  70 }
  71
  72 class AjaxCachePolicy {
  73         var $policy;
  74
  75         function AjaxCachePolicy( $policy = null ) {
  76                 $this->policy = $policy;
  77         }
  78
  79         function setPolicy( $policy ) {
  80                 $this->policy = $policy;
  81         }
  82
  83         function writeHeader() {
  84                 header ("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
  85                 if ( is_null( $this->policy ) ) {
  86                         // Bust cache in the head
  87                         header ("Expires: Mon, 26 Jul 1997 05:00:00 GMT");    // Date in the past
  88                         // always modified
  89                         header ("Cache-Control: no-cache, must-revalidate");  // HTTP/1.1
  90                         header ("Pragma: no-cache");                          // HTTP/1.0
  91                 } else {
  92                         header ("Expires: " . gmdate( "D, d M Y H:i:s", time() + $this->policy ) . " GMT");
  93                         header ("Cache-Control: public,max-age={$this->policy}");
  94                 }
  95         }
  96 }
  97
  98
  99 function wfSajaxSearch( $term ) {
 100         global $wgContLang, $wgUser, $wgRequest, $wgAjaxCachePolicy;
 101         $limit = 16;
 102
 103         $l = new Linker;
 104
 105         $term = str_replace( ' ', '_', $wgContLang->ucfirst(
 106                         $wgContLang->checkTitleEncoding( $wgContLang->recodeInput( js_unescape( $term ) ) )
 107                 ) );
 108
 109         if ( strlen( str_replace( '_', '', $term ) )<3 )
 110                 return;
 111
 112         $wgAjaxCachePolicy->setPolicy( 30*60 );
 113
 114         $db =& wfGetDB( DB_SLAVE );
 115         $res = $db->select( 'page', 'page_title',
 116                         array(  'page_namespace' => 0,
 117                                 "page_title LIKE '". $db->strencode( $term) ."%'" ),
 118                                 "wfSajaxSearch",
 119                                 array( 'LIMIT' => $limit+1 )
 120                         );
 121
 122         $r = "";
 123
 124         $i=0;
 125         while ( ( $row = $db->fetchObject( $res ) ) && ( ++$i <= $limit ) ) {
 126                 $nt = Title::newFromDBkey( $row->page_title );
 127                 $r .= '<li>' . $l->makeKnownLinkObj( $nt ) . "</li>\n";
 128         }
 129         if ( $i > $limit ) {
 130                 $more = '<i>' .  $l->makeKnownLink( $wgContLang->specialPage( "Allpages" ),
 131                                                 wfMsg('moredotdotdot'),
 132                                                 "namespace=0&from=" . wfUrlEncode ( $term ) ) .
 133                         '</i>';
 134         } else {
 135                 $more = '';
 136         }
 137
 138         $term = htmlspecialchars( $term );
 139         return '<div style="float:right; border:solid 1px black;background:gainsboro;padding:2px;"><a onclick="Searching_Hide_Results();">'
 140                 . wfMsg( 'hideresults' ) . '</a></div>'
 141                 . '<h1 class="firstHeading">'.wfMsg('search')
 142                 . '</h1><div id="contentSub">'.wfMsg('searchquery', $term) . '</div><ul><li>'
 143                 . $l->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 144                                         wfMsg( 'searchcontaining', $term ),
 145                                         "search=$term&fulltext=Search" )
 146                 . '</li><li>' . $l->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 147                                         wfMsg( 'searchnamed', $term ) ,
 148                                         "search=$term&go=Go" )
 149                 . "</li></ul><h2>" . wfMsg( 'articletitles', $term ) . "</h2>"
 150                 . '<ul>' .$r .'</ul>'.$more;
 151 }
 152
 153 ?>