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<?php
/**
* MessageSource_MySQL class file.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the BSD License.
*
* Copyright(c) 2004 by Qiang Xue. All rights reserved.
*
* To contact the author write to {@link mailto:qiang.xue@gmail.com Qiang Xue}
* The latest version of PRADO can be obtained from:
* {@link http://prado.sourceforge.net/}
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @version $Revision: 1.4 $ $Date: 2005/02/25 09:59:40 $
* @package System.I18N.core
*/
/**
* Get the MessageSource class file.
*/
require_once(dirname(__FILE__).'/MessageSource.php');
/**
* Get the I18N utility file, contains the DSN parser.
*/
require_once(dirname(__FILE__).'/util.php');
/**
* MessageSource_MySQL class.
*
* Retrive the message translation from a MySQL database.
*
* See the MessageSource::factory() method to instantiate this class.
*
* @author Xiang Wei Zhuo <weizhuo[at]gmail[dot]com>
* @version v1.0, last update on Fri Dec 24 16:58:58 EST 2004
* @package System.I18N.core
*/
class MessageSource_MySQL extends MessageSource
{
/**
* The datasource string, full DSN to the database.
* @var string
*/
protected $source;
/**
* The DSN array property, parsed by PEAR's DB DSN parser.
* @var array
*/
protected $dns;
/**
* A resource link to the database
* @var db
*/
protected $db;
/**
* Constructor.
* Create a new message source using MySQL.
* @param string MySQL datasource, in PEAR's DB DSN format.
* @see MessageSource::factory();
*/
function __construct($source)
{
$this->source = (string)$source;
$this->dns = parseDSN($this->source);
$this->db = $this->connect();
}
/**
* Destructor, close the database connection.
*/
function __destruct()
{
@mysql_close($this->db);
}
/**
* Connect to the MySQL datasource
* @return resource MySQL connection.
* @throws Exception, connection and database errors.
*/
protected function connect()
{
/*static $conn;
if(!is_null($conn))
return $conn;
*/
$dsninfo = $this->dns;
if (isset($dsninfo['protocol']) && $dsninfo['protocol'] == 'unix')
$dbhost = ':' . $dsninfo['socket'];
else
{
$dbhost = $dsninfo['hostspec'] ? $dsninfo['hostspec'] : 'localhost';
if (!empty($dsninfo['port']))
$dbhost .= ':' . $dsninfo['port'];
}
$user = $dsninfo['username'];
$pw = $dsninfo['password'];
$connect_function = 'mysql_connect';
if ($dbhost && $user && $pw)
$conn = @$connect_function($dbhost, $user, $pw);
elseif ($dbhost && $user)
$conn = @$connect_function($dbhost, $user);
elseif ($dbhost)
$conn = @$connect_function($dbhost);
else
$conn = false;
if (empty($conn))
{
throw new Exception('Error in connecting to '.$dsninfo);
}
if ($dsninfo['database'])
{
if (!@mysql_select_db($dsninfo['database'], $conn))
throw new Exception('Error in connecting database, dns:'.
$dsninfo);
}
else
throw new Exception('Please provide a database for message'.
' translation.');
return $conn;
}
/**
* Get the database connection.
* @return db database connection.
*/
public function connection()
{
return $this->db;
}
/**
* Get an array of messages for a particular catalogue and cultural
* variant.
* @param string the catalogue name + variant
* @return array translation messages.
*/
protected function &loadData($variant)
{
$variant = mysql_real_escape_string($variant);
$statement =
"SELECT t.id, t.source, t.target, t.comments
FROM trans_unit t, catalogue c
WHERE c.cat_id = t.cat_id
AND c.name = '{$variant}'
ORDER BY id ASC";
$rs = mysql_query($statement,$this->db);
$result = array();
while($row = mysql_fetch_array($rs,MYSQL_NUM))
{
$source = $row[1];
$result[$source][] = $row[2]; //target
$result[$source][] = $row[0]; //id
$result[$source][] = $row[3]; //comments
}
return $result;
}
/**
* Get the last modified unix-time for this particular catalogue+variant.
* We need to query the database to get the date_modified.
* @param string catalogue+variant
* @return int last modified in unix-time format.
*/
protected function getLastModified($source)
{
$source = mysql_real_escape_string($source);
$rs = mysql_query(
"SELECT date_modified FROM catalogue WHERE name = '{$source}'",
$this->db);
$result = $rs ? (int)mysql_result($rs,0) : 0;
return $result;
}
/**
* Check if a particular catalogue+variant exists in the database.
* @param string catalogue+variant
* @return boolean true if the catalogue+variant is in the database,
* false otherwise.
*/
protected function isValidSource($variant)
{
$variant = mysql_real_escape_string ($variant);
$rs = mysql_query(
"SELECT COUNT(*) FROM catalogue WHERE name = '{$variant}'",
$this->db);
$row = mysql_fetch_array($rs,MYSQL_NUM);
$result = $row && $row[0] == '1';
return $result;
}
/**
* Get all the variants of a particular catalogue.
* @param string catalogue name
* @return array list of all variants for this catalogue.
*/
protected function getCatalogueList($catalogue)
{
$variants = explode('_',$this->culture);
$catalogues = array($catalogue);
$variant = null;
for($i = 0, $k = count($variants); $i < $k; ++$i)
{
if(isset($variants[$i]{0}))
{
$variant .= ($variant)?'_'.$variants[$i]:$variants[$i];
$catalogues[] = $catalogue.'.'.$variant;
}
}
return array_reverse($catalogues);
}
/**
* Retrive catalogue details, array($cat_id, $variant, $count).
* @param string catalogue
* @return array catalogue details, array($cat_id, $variant, $count).
*/
private function getCatalogueDetails($catalogue='messages')
{
if(empty($catalogue))
$catalogue = 'messages';
$variant = $catalogue.'.'.$this->culture;
$name = mysql_real_escape_string($this->getSource($variant));
$rs = mysql_query("SELECT cat_id
FROM catalogue WHERE name = '{$name}'", $this->db);
if(mysql_num_rows($rs) != 1)
return false;
$cat_id = (int)mysql_result($rs,0);
//first get the catalogue ID
$rs = mysql_query(
"SELECT count(msg_id)
FROM trans_unit
WHERE cat_id = {$cat_id}", $this->db);
$count = (int)mysql_result($rs,0);
return array($cat_id, $variant, $count);
}
/**
* Update the catalogue last modified time.
* @return boolean true if updated, false otherwise.
*/
private function updateCatalogueTime($cat_id, $variant)
{
$time = time();
$result = mysql_query("UPDATE catalogue
SET date_modified = {$time}
WHERE cat_id = {$cat_id}", $this->db);
if(!empty($this->cache))
$this->cache->clean($variant, $this->culture);
return $result;
}
/**
* Save the list of untranslated blocks to the translation source.
* If the translation was not found, you should add those
* strings to the translation source via the <b>append()</b> method.
* @param string the catalogue to add to
* @return boolean true if saved successfuly, false otherwise.
*/
function save($catalogue='messages')
{
$messages = $this->untranslated;
if(count($messages) <= 0) return false;
$details = $this->getCatalogueDetails($catalogue);
if($details)
list($cat_id, $variant, $count) = $details;
else
return false;
if($cat_id <= 0) return false;
$inserted = 0;
$time = time();
foreach($messages as $message)
{
$count++; $inserted++;
$message = mysql_real_escape_string($message);
$statement = "INSERT INTO trans_unit
(cat_id,id,source,date_added) VALUES
({$cat_id}, {$count},'{$message}',$time)";
mysql_query($statement, $this->db);
}
if($inserted > 0)
$this->updateCatalogueTime($cat_id, $variant);
return $inserted > 0;
}
/**
* Delete a particular message from the specified catalogue.
* @param string the source message to delete.
* @param string the catalogue to delete from.
* @return boolean true if deleted, false otherwise.
*/
function delete($message, $catalogue='messages')
{
$details = $this->getCatalogueDetails($catalogue);
if($details)
list($cat_id, $variant, $count) = $details;
else
return false;
$text = mysql_real_escape_string($message);
$statement = "DELETE FROM trans_unit WHERE
cat_id = {$cat_id} AND source = '{$message}'";
$deleted = false;
mysql_query($statement, $this->db);
if(mysql_affected_rows($this->db) == 1)
$deleted = $this->updateCatalogueTime($cat_id, $variant);
return $deleted;
}
/**
* Update the translation.
* @param string the source string.
* @param string the new translation string.
* @param string comments
* @param string the catalogue of the translation.
* @return boolean true if translation was updated, false otherwise.
*/
function update($text, $target, $comments, $catalogue='messages')
{
$details = $this->getCatalogueDetails($catalogue);
if($details)
list($cat_id, $variant, $count) = $details;
else
return false;
$comments = mysql_real_escape_string($comments);
$target = mysql_real_escape_string($target);
$text = mysql_real_escape_string($text);
$time = time();
$statement = "UPDATE trans_unit SET
target = '{$target}',
comments = '{$comments}',
date_modified = '{$time}'
WHERE cat_id = {$cat_id}
AND source = '{$text}'";
$updated = false;
mysql_query($statement, $this->db);
if(mysql_affected_rows($this->db) == 1)
$updated = $this->updateCatalogueTime($cat_id, $variant);
return $updated;
}
/**
* Returns a list of catalogue as key and all it variants as value.
* @return array list of catalogues
*/
function catalogues()
{
$statement = 'SELECT name FROM catalogue ORDER BY name';
$rs = mysql_query($statement, $this->db);
$result = array();
while($row = mysql_fetch_array($rs,MYSQL_NUM))
{
$details = explode('.',$row[0]);
if(!isset($details[1])) $details[1] = null;
$result[] = $details;
}
return $result;
}
}
?>
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