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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;
}