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<?php
/**
* Client for querying zhdaemon.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
/**
* Client for querying zhdaemon
*/
class ZhClient {
var $mHost, $mPort, $mFP, $mConnected;
/**
* Constructor
*
* @param $host
* @param $port
*
* @return ZhClient
*/
function __construct( $host, $port ) {
$this->mHost = $host;
$this->mPort = $port;
$this->mConnected = $this->connect();
}
/**
* Check if connection to zhdaemon is successful
*
* @return bool
*/
function isconnected() {
return $this->mConnected;
}
/**
* Establish connection
*
* @access private
*
* @return bool
*/
function connect() {
wfSuppressWarnings();
$errno = $errstr = '';
$this->mFP = fsockopen( $this->mHost, $this->mPort, $errno, $errstr, 30 );
wfRestoreWarnings();
return !$this->mFP;
}
/**
* Query the daemon and return the result
*
* @access private
*
* @return string
*/
function query( $request ) {
if ( !$this->mConnected ) {
return false;
}
fwrite( $this->mFP, $request );
$result = fgets( $this->mFP, 1024 );
list( $status, $len ) = explode( ' ', $result );
if( $status == 'ERROR' ) {
// $len is actually the error code...
print "zhdaemon error $len<br />\n";
return false;
}
$bytesread = 0;
$data = '';
while( !feof( $this->mFP ) && $bytesread < $len ) {
$str = fread( $this->mFP, $len - $bytesread );
$bytesread += strlen( $str );
$data .= $str;
}
// data should be of length $len. otherwise something is wrong
return strlen( $data ) == $len;
}
/**
* Convert the input to a different language variant
*
* @param string $text input text
* @param string $tolang language variant
* @return string the converted text
*/
function convert( $text, $tolang ) {
$len = strlen( $text );
$q = "CONV $tolang $len\n$text";
$result = $this->query( $q );
if ( !$result ) {
$result = $text;
}
return $result;
}
/**
* Convert the input to all possible variants
*
* @param string $text input text
* @return array langcode => converted_string
*/
function convertToAllVariants( $text ) {
$len = strlen( $text );
$q = "CONV ALL $len\n$text";
$result = $this->query( $q );
if ( !$result ) {
return false;
}
list( $infoline, $data ) = explode( '|', $result, 2 );
$info = explode( ';', $infoline );
$ret = array();
$i = 0;
foreach( $info as $variant ) {
list( $code, $len ) = explode( ' ', $variant );
$ret[strtolower( $code )] = substr( $data, $i, $len );
$i += $len;
}
return $ret;
}
/**
* Perform word segmentation
*
* @param string $text input text
* @return string segmented text
*/
function segment( $text ) {
$len = strlen( $text );
$q = "SEG $len\n$text";
$result = $this->query( $q );
if ( !$result ) { // fallback to character based segmentation
$result = $this->segment( $text );
}
return $result;
}
/**
* Close the connection
*/
function close() {
fclose( $this->mFP );
}
}