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 define( 'AJAX_SEARCH_VERSION', 1 );     //AJAX search cache version
  77
  78 function wfSajaxSearch( $term ) {
  79         global $wgContLang, $wgOut, $wgUser, $wgCapitalLinks, $wgMemc;
  80         $limit = 16;
  81         $sk = $wgUser->getSkin();
  82         $output = '';
  83
  84         if( !wfRunHooks( 'SajaxSearch', array( $term, &$output ) ) ) {
  85                 $response = new AjaxResponse( $output );
  86                 $response->setCacheDuration( 30*60 );
  87                 return $response;
  88         }
  89
  90         $term = trim( $term );
  91         $term = $wgContLang->checkTitleEncoding( $wgContLang->recodeInput( js_unescape( $term ) ) );
  92         if ( $wgCapitalLinks )
  93                 $term = $wgContLang->ucfirst( $term );
  94         $term_title = Title::newFromText( $term );
  95
  96         $memckey = $term_title ? wfMemcKey( 'ajaxsearch', md5( $term_title->getFullText() ) ) : wfMemcKey( 'ajaxsearch', md5( $term ) );
  97         $cached = $wgMemc->get($memckey);
  98         if( is_array( $cached ) && $cached['version'] == AJAX_SEARCH_VERSION ) {
  99                 $response = new AjaxResponse( $cached['html'] );
 100                 $response->setCacheDuration( 30*60 );
 101                 return $response;
 102         }
 103
 104         $r = $more = '';
 105         $canSearch = true;
 106         if( $term_title && $term_title->getNamespace() != NS_SPECIAL ) {
 107                 $db = wfGetDB( DB_SLAVE );
 108                 $res = $db->select( 'page', array( 'page_title', 'page_namespace' ),
 109                                 array(  'page_namespace' => $term_title->getNamespace(),
 110                                         "page_title LIKE '". $db->strencode( $term_title->getDBkey() ) ."%'" ),
 111                                         "wfSajaxSearch",
 112                                         array( 'LIMIT' => $limit+1 )
 113                                 );
 114
 115                 $i = 0;
 116                 while ( ( $row = $db->fetchObject( $res ) ) && ( ++$i <= $limit ) ) {
 117                         $nt = Title::makeTitle( $row->page_namespace, $row->page_title );
 118                         $r .= '<li>' . $sk->makeKnownLinkObj( $nt ) . "</li>\n";
 119                 }
 120                 if ( $i > $limit ) {
 121                         $more = '<i>' .  $sk->makeKnownLink( $wgContLang->specialPage( "Allpages" ),
 122                                                                                         wfMsg('moredotdotdot'),
 123                                                                                         "namespace=0&from=" . wfUrlEncode ( $term ) ) .
 124                                 '</i>';
 125                 }
 126         } else if( $term_title && $term_title->getNamespace() == NS_SPECIAL ) {
 127                 SpecialPage::initList();
 128                 SpecialPage::initAliasList();
 129                 $specialPages = array_merge(
 130                         array_keys( SpecialPage::$mList ),
 131                         array_keys( SpecialPage::$mAliases )
 132                 );
 133
 134                 foreach( $specialPages as $page ) {
 135                         if( $wgContLang->uc( $page ) != $page && strpos( $page, $term_title->getText() ) === 0 ) {
 136                                 $r .= '<li>' . $sk->makeKnownLinkObj( Title::makeTitle( NS_SPECIAL, $page ) ) . '</li>';
 137                         }
 138                 }
 139
 140                 $canSearch = false;
 141         }
 142
 143         $valid = (bool) $term_title;
 144         $term_url = urlencode( $term );
 145         $term_diplay = htmlspecialchars( $valid ? $term_title->getFullText() : $term );
 146         $subtitlemsg = ( $valid ? 'searchsubtitle' : 'searchsubtitleinvalid' );
 147         $subtitle = wfMsgWikiHtml( $subtitlemsg, $term_diplay );
 148         $html = '<div id="searchTargetHide"><a onclick="Searching_Hide_Results();">'
 149                 . wfMsgHtml( 'hideresults' ) . '</a></div>'
 150                 . '<h1 class="firstHeading">'.wfMsgHtml('search')
 151                 . '</h1><div id="contentSub">'. $subtitle . '</div>';
 152         if( $canSearch ) {
 153                 $html .= '<ul><li>'
 154                         . $sk->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 155                                                 wfMsgHtml( 'searchcontaining', $term_diplay ),
 156                                                 "search={$term_url}&fulltext=Search" )
 157                         . '</li><li>' . $sk->makeKnownLink( $wgContLang->specialPage( 'Search' ),
 158                                                 wfMsgHtml( 'searchnamed', $term_diplay ) ,
 159                                                 "search={$term_url}&go=Go" )
 160                         . "</li></ul>";
 161         }
 162         if( $r ) {
 163                 $html .= "<h2>" . wfMsgHtml( 'articletitles', $term_diplay ) . "</h2>"
 164                         . '<ul>' .$r .'</ul>' . $more;
 165         }
 166
 167         $wgMemc->set( $memckey, array( 'version' => AJAX_SEARCH_VERSION, 'html' => $html ), 30 * 60 );
 168
 169         $response = new AjaxResponse( $html );
 170         $response->setCacheDuration( 30*60 );
 171         return $response;
 172 }
 173
 174 /**
 175  * Called for AJAX watch/unwatch requests.
 176  * @param $pagename Prefixed title string for page to watch/unwatch
 177  * @param $watch String 'w' to watch, 'u' to unwatch
 178  * @return String '<w#>' or '<u#>' on successful watch or unwatch,
 179  *   respectively, followed by an HTML message to display in the alert box; or
 180  *   '<err#>' on error
 181  */
 182 function wfAjaxWatch($pagename = "", $watch = "") {
 183         if(wfReadOnly()) {
 184                 // redirect to action=(un)watch, which will display the database lock
 185                 // message
 186                 return '<err#>';
 187         }
 188
 189         if('w' !== $watch && 'u' !== $watch) {
 190                 return '<err#>';
 191         }
 192         $watch = 'w' === $watch;
 193
 194         $title = Title::newFromDBkey($pagename);
 195         if(!$title) {
 196                 // Invalid title
 197                 return '<err#>';
 198         }
 199         $article = new Article($title);
 200         $watching = $title->userIsWatching();
 201
 202         if($watch) {
 203                 if(!$watching) {
 204                         $dbw = wfGetDB(DB_MASTER);
 205                         $dbw->begin();
 206                         $article->doWatch();
 207                         $dbw->commit();
 208                 }
 209         } else {
 210                 if($watching) {
 211                         $dbw = wfGetDB(DB_MASTER);
 212                         $dbw->begin();
 213                         $article->doUnwatch();
 214                         $dbw->commit();
 215                 }
 216         }
 217         if( $watch ) {
 218                 return '<w#>'.wfMsgExt( 'addedwatchtext', array( 'parse' ), $title->getPrefixedText() );
 219         } else {
 220                 return '<u#>'.wfMsgExt( 'removedwatchtext', array( 'parse' ), $title->getPrefixedText() );
 221         }
 222 }
 223