Subversion-Projekte lars-tiefland.prado

<?php

/**

 * MessageSource_SQLite 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_SQLite class.

 *

 * Retrive the message translation from a SQLite 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_SQLite extends MessageSource

{

	/**

	 * The SQLite datasource, the filename of the database.

	 * @var string

	 */

	protected $source;

	/**

	 * Constructor.

	 * Create a new message source using SQLite.

	 * @see MessageSource::factory();

	 * @param string SQLite datasource, in PEAR's DB DSN format.

	 */

	function __construct($source)

	{

		$dsn = parseDSN((string)$source);

		$this->source = $dsn['database'];

	}

	/**

	 * 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)

	{

		$variant = sqlite_escape_string($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";

		$db = sqlite_open($this->source);

		$rs = sqlite_query($statement, $db);

		$result = array();

		while($row = sqlite_fetch_array($rs,SQLITE_NUM))

		{

			$source = $row[1];

			$result[$source][] = $row[2]; //target

			$result[$source][] = $row[0]; //id

			$result[$source][] = $row[3]; //comments

		}

		sqlite_close($db);

		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)

	{

		$source = sqlite_escape_string($source);

		$db = sqlite_open($this->source);

		$rs = sqlite_query(

			"SELECT date_modified FROM catalogue WHERE name = '{$source}'",

			$db);

		$result = $rs ? (int)sqlite_fetch_single($rs) : 0;

		sqlite_close($db);

		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)

	{

		$variant = sqlite_escape_string($variant);

		$db = sqlite_open($this->source);

		$rs = sqlite_query(

			"SELECT COUNT(*) FROM catalogue WHERE name = '{$variant}'",

			$db);

		$result = $rs && (int)sqlite_fetch_single($rs);

		sqlite_close($db);

		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;

		$name = sqlite_escape_string($this->getSource($variant));

		$db = sqlite_open($this->source);

		$rs = sqlite_query("SELECT cat_id

					FROM catalogue WHERE name = '{$name}'", $db);

		if(sqlite_num_rows($rs) != 1)

			return false;

		$cat_id = (int)sqlite_fetch_single($rs);

		//first get the catalogue ID

		$rs = sqlite_query(

			"SELECT count(msg_id)

				FROM trans_unit

				WHERE cat_id = {$cat_id}", $db);

		$count = (int)sqlite_fetch_single($rs);

		sqlite_close($db);

		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, $db)

	{

		$time = time();

		$result = sqlite_query("UPDATE catalogue

							SET date_modified = {$time}

							WHERE cat_id = {$cat_id}", $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;

		$db = sqlite_open($this->source);

		$time = time();

		foreach($messages as $message)

		{

			$message = sqlite_escape_string($message);

			$statement = "INSERT INTO trans_unit

				(cat_id,id,source,date_added) VALUES

				({$cat_id}, {$count},'{$message}',$time)";

			if(sqlite_query($statement, $db))

			{

				$count++; $inserted++;

			}

		}

		if($inserted > 0)

			$this->updateCatalogueTime($cat_id, $variant, $db);

		sqlite_close($db);

		return $inserted > 0;

	}

	/**

	 * 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;

		$comments = sqlite_escape_string($comments);

		$target = sqlite_escape_string($target);

		$text = sqlite_escape_string($text);

		$time = time();

		$db = sqlite_open($this->source);

		$statement = "UPDATE trans_unit SET

						target = '{$target}',

						comments = '{$comments}',

						date_modified = '{$time}'

					WHERE cat_id = {$cat_id}

						AND source = '{$text}'";

		$updated = false;

		if(sqlite_query($statement, $db))

			$updated = $this->updateCatalogueTime($cat_id, $variant, $db);

		sqlite_close($db);

		return $updated;

	}

	/**

	 * 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;

		$db = sqlite_open($this->source);

		$text = sqlite_escape_string($message);

		$statement = "DELETE FROM trans_unit WHERE

						cat_id = {$cat_id} AND source = '{$message}'";

		$deleted = false;

		if(sqlite_query($statement, $db))

			$deleted = $this->updateCatalogueTime($cat_id, $variant, $db);

		sqlite_close($db);

		return $deleted;

	}

	/**

	 * Returns a list of catalogue as key and all it variants as value.

	 * @return array list of catalogues

	 */

	function catalogues()

	{

		$db = sqlite_open($this->source);

		$statement = 'SELECT name FROM catalogue ORDER BY name';

		$rs = sqlite_query($statement, $db);

		$result = array();

		while($row = sqlite_fetch_array($rs,SQLITE_NUM))

		{

			$details = explode('.',$row[0]);

			if(!isset($details[1])) $details[1] = null;

			$result[] = $details;

		}

		sqlite_close($db);

		return $result;

	}

}

?>