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<?php
/**
* @file
* @ingroup Ajax
*/
if( !defined( 'MEDIAWIKI' ) ) {
die( 1 );
}
/**
* Function converts an Javascript escaped string back into a string with
* specified charset (default is UTF-8).
* Modified function from http://pure-essence.net/stuff/code/utf8RawUrlDecode.phps
*
* @param $source String escaped with Javascript's escape() function
* @param $iconv_to String destination character set will be used as second parameter
* in the iconv function. Default is UTF-8.
* @return string
*/
function js_unescape($source, $iconv_to = 'UTF-8') {
$decodedStr = '';
$pos = 0;
$len = strlen ($source);
while ($pos < $len) {
$charAt = substr ($source, $pos, 1);
if ($charAt == '%') {
$pos++;
$charAt = substr ($source, $pos, 1);
if ($charAt == 'u') {
// we got a unicode character
$pos++;
$unicodeHexVal = substr ($source, $pos, 4);
$unicode = hexdec ($unicodeHexVal);
$decodedStr .= code2utf($unicode);
$pos += 4;
} else {
// we have an escaped ascii character
$hexVal = substr ($source, $pos, 2);
$decodedStr .= chr (hexdec ($hexVal));
$pos += 2;
}
} else {
$decodedStr .= $charAt;
$pos++;
}
}
if ($iconv_to != "UTF-8") {
$decodedStr = iconv("UTF-8", $iconv_to, $decodedStr);
}
return $decodedStr;
}
/**
* Function coverts number of utf char into that character.
* Function taken from: http://www.php.net/manual/en/function.utf8-encode.php#49336
*
* @param $num Integer
* @return utf8char
*/
function code2utf($num){
if ( $num<128 )
return chr($num);
if ( $num<2048 )
return chr(($num>>6)+192).chr(($num&63)+128);
if ( $num<65536 )
return chr(($num>>12)+224).chr((($num>>6)&63)+128).chr(($num&63)+128);
if ( $num<2097152 )
return chr(($num>>18)+240).chr((($num>>12)&63)+128).chr((($num>>6)&63)+128) .chr(($num&63)+128);
return '';
}
/**
* Called for AJAX watch/unwatch requests.
* @param $pagename Prefixed title string for page to watch/unwatch
* @param $watch String 'w' to watch, 'u' to unwatch
* @return String '<w#>' or '<u#>' on successful watch or unwatch,
* respectively, followed by an HTML message to display in the alert box; or
* '<err#>' on error
*/
function wfAjaxWatch($pagename = "", $watch = "") {
if(wfReadOnly()) {
// redirect to action=(un)watch, which will display the database lock
// message
return '<err#>';
}
if('w' !== $watch && 'u' !== $watch) {
return '<err#>';
}
$watch = 'w' === $watch;
$title = Title::newFromDBkey($pagename);
if(!$title) {
// Invalid title
return '<err#>';
}
$article = new Article($title);
$watching = $title->userIsWatching();
if($watch) {
if(!$watching) {
$dbw = wfGetDB(DB_MASTER);
$dbw->begin();
$ok = $article->doWatch();
$dbw->commit();
}
} else {
if($watching) {
$dbw = wfGetDB(DB_MASTER);
$dbw->begin();
$ok = $article->doUnwatch();
$dbw->commit();
}
}
// Something stopped the change
if( isset($ok) && !$ok ) {
return '<err#>';
}
if( $watch ) {
return '<w#>'.wfMsgExt( 'addedwatchtext', array( 'parse' ), $title->getPrefixedText() );
} else {
return '<u#>'.wfMsgExt( 'removedwatchtext', array( 'parse' ), $title->getPrefixedText() );
}
}
/**
* Called in some places (currently just extensions)
* to get the thumbnail URL for a given file at a given resolution.
*/
function wfAjaxGetThumbnailUrl( $file, $width, $height ) {
$file = wfFindFile( $file );
if ( !$file || !$file->exists() )
return null;
$url = $file->getThumbnail( $width, $height )->url;
return $url;
}
/**
* Called in some places (currently just extensions)
* to get the URL for a given file.
*/
function wfAjaxGetFileUrl( $file ) {
$file = wfFindFile( $file );
if ( !$file || !$file->exists() )
return null;
$url = $file->getUrl();
return $url;
}
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