Subversion-Projekte lars-tiefland.php_share

<?php

/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */

/**

 * Contains the Translation2_Container_mdb class

 *

 * PHP versions 4 and 5

 *

 * LICENSE: Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. The name of the author may not be used to endorse or promote products

 *    derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED

 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY

 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *

 * @category  Internationalization

 * @package   Translation2

 * @author    Lorenzo Alberton <l.alberton@quipo.it>

 * @copyright 2004-2008 Lorenzo Alberton

 * @license   http://www.debian.org/misc/bsd.license  BSD License (3 Clause)

 * @version   CVS: $Id: mdb.php 305985 2010-12-05 22:55:33Z clockwerx $

 * @link      http://pear.php.net/package/Translation2

 */

/**

 * require Translation2_Container class

 */

require_once 'Translation2/Container.php';

/**

 * Storage driver for fetching data from a database

 *

 * This storage driver can use all databases which are supported

 * by the PEAR::MDB abstraction layer to fetch data.

 *

 * @category  Internationalization

 * @package   Translation2

 * @author    Lorenzo Alberton <l.alberton@quipo.it>

 * @copyright 2004-2008 Lorenzo Alberton

 * @license   http://www.debian.org/misc/bsd.license  BSD License (3 Clause)

 * @version   CVS: $Id: mdb.php 305985 2010-12-05 22:55:33Z clockwerx $

 * @link      http://pear.php.net/package/Translation2

 */

class Translation2_Container_mdb extends Translation2_Container

{

    // {{{ class vars

    /**

     * MDB object

     * @var object

     */

    var $db = null;

    /**

     * query counter

     * @var integer

     * @access private

     */

    var $_queries = 0;

    // }}}

    // {{{ init

    /**

     * Initialize the container

     *

     * @param string &$db Connection data or MDB object

     *

     * @return boolean|PEAR_Error object if something went wrong

     */

    function init(&$db)

    {

        $this->_setDefaultOptions();

        if (PEAR::isError($err = $this->_connect($db))) {

            return $err;

        }

        return true;

    }

    // }}}

    // {{{ _connect()

    /**

     * Connect to database by using the given DSN string

     *

     * @param mixed &$db DSN string | array | mdb object

     *

     * @return boolean|PEAR_Error on error

     * @access private

     */

    function _connect(&$db)

    {

        if (is_object($db) && is_a($db, 'MDB_Common')) {

            $this->db = &$db;

        } elseif (is_string($db) || is_array($db)) {

            include_once 'MDB.php';

            $this->db =& MDB::connect($db);

        } elseif (is_object($db) && MDB::isError($db)) {

            return PEAR::raiseError($db->getMessage(), $db->code);

        } else {

            return PEAR::raiseError('The given dsn was not valid in file '

                                    . __FILE__ . ' at line ' . __LINE__,

                                    TRANSLATION2_ERROR_CANNOT_CONNECT,

                                    PEAR_ERROR_RETURN);

        }

        if (PEAR::isError($this->db)) {

            return $this->db;

        }

        return true;

    }

    // }}}

    // {{{ _setDefaultOptions()

    /**

     * Set some default options

     *

     * @access private

     * @return void

     */

    function _setDefaultOptions()

    {

        $this->options['langs_avail_table'] = 'langs';

        $this->options['lang_id_col']       = 'id';

        $this->options['lang_name_col']     = 'name';

        $this->options['lang_meta_col']     = 'meta';

        $this->options['lang_errmsg_col']   = 'error_text';

        $this->options['lang_encoding_col'] = 'encoding';

        $this->options['strings_default_table'] = 'i18n';

        $this->options['strings_tables']        = array(); // 'lang_id' => 'table_name'

        $this->options['string_id_col']         = 'id';

        $this->options['string_page_id_col']    = 'page_id';

        $this->options['string_page_id_col_length'] = 50;

        $this->options['string_text_col']       = '%s'; // col_name if one table per lang is used,

                                                        // or a pattern (i.e. "tr_%s" => "tr_EN_US")

    }

    // }}}

    // {{{ fetchLangs()

    /**

     * Fetch the available langs if they're not cached yet.

     *

     * @return PEAR_Error on error

     */

    function fetchLangs()

    {

        $query = sprintf('SELECT %s AS id, %s AS name, %s AS meta, %s AS error_text, %s AS encoding FROM %s',

            $this->db->quoteIdentifier($this->options['lang_id_col']),

            $this->db->quoteIdentifier($this->options['lang_name_col']),

            $this->db->quoteIdentifier($this->options['lang_meta_col']),

            $this->db->quoteIdentifier($this->options['lang_errmsg_col']),

            $this->db->quoteIdentifier($this->options['lang_encoding_col']),

            $this->db->quoteIdentifier($this->options['langs_avail_table'])

        );

        ++$this->_queries;

        $res = $this->db->getAll($query, null, array(), null, MDB_FETCHMODE_ASSOC);

        if (PEAR::isError($res)) {

            return $res;

        }

        foreach ($res as $row) {

            $row = array_change_key_case($row, CASE_LOWER);

            $this->langs[$row['id']] = $row;

        }

    }

    // }}}

    // {{{ getPage()

    /**

     * Returns an array of the strings in the selected page

     *

     * @param string $pageID page/group ID

     * @param string $langID language ID

     *

     * @return array|PEAR_Error on error

     */

    function getPage($pageID = null, $langID = null)

    {

        $langID = $this->_getLangID($langID);

        if (PEAR::isError($langID)) {

            return $langID;

        }

        $lang_col = $this->_getLangCol($langID);

        $table    = $this->_getLangTable($langID);

        $query = sprintf('SELECT %s, %s FROM %s WHERE %s ',

             $this->db->quoteIdentifier($this->options['string_id_col']),

             $this->db->quoteIdentifier($lang_col),

             $this->db->quoteIdentifier($table),

             $this->db->quoteIdentifier($this->options['string_page_id_col'])

        );

        if (is_null($pageID)) {

            $query .= 'IS NULL';

        } else {

            $query .= ' = ' . $this->db->getTextValue($pageID);

        }

        ++$this->_queries;

        $res = $this->db->getAssoc($query);

        return $res;

    }

    // }}}

    // {{{ getOne()

    /**

     * Get a single item from the container

     *

     * @param string $stringID string ID

     * @param string $pageID   page/group ID

     * @param string $langID   language ID

     *

     * @return string

     */

    function getOne($stringID, $pageID = null, $langID = null)

    {

        $langID = $this->_getLangID($langID);

        if (PEAR::isError($langID)) {

            return $langID;

        }

        $lang_col = $this->_getLangCol($langID);

        $table    = $this->_getLangTable($langID);

        $query = sprintf('SELECT %s FROM %s WHERE %s = %s AND %s',

             $this->db->quoteIdentifier($lang_col),

             $this->db->quoteIdentifier($table),

             $this->db->quoteIdentifier($this->options['string_id_col']),

             $this->db->getTextValue($stringID),

             $this->db->quoteIdentifier($this->options['string_page_id_col'])

        );

        if (is_null($pageID)) {

            $query .= ' IS NULL';

        } else {

            $query .= ' = ' . $this->db->getTextValue($pageID);

        }

        ++$this->_queries;

        return $this->db->getOne($query);

    }

    // }}}

    // {{{ getStringID()

    /**

     * Get the stringID for the given string

     *

     * @param string $string string

     * @param string $pageID page/group ID

     *

     * @return string

     */

    function getStringID($string, $pageID = null)

    {

        $lang_col = $this->_getLangCol($this->currentLang['id']);

        $table = $this->_getLangTable($this->currentLang['id']);

        $query = sprintf('SELECT %s FROM %s WHERE %s = %s AND %s',

             $this->db->quoteIdentifier($this->options['string_id_col']),

             $this->db->quoteIdentifier($table),

             $this->db->quoteIdentifier($lang_col),

             $this->db->getTextValue($string),

             $this->db->quoteIdentifier($this->options['string_page_id_col'])

        );

        if (is_null($pageID)) {

            $query .= ' IS NULL';

        } else {

            $query .= ' = ' . $this->db->getTextValue($pageID);

        }

        ++$this->_queries;

        return $this->db->getOne($query);

    }

    // }}}

    // {{{ _getLangTable()

    /**

     * Get the table a language is stored in

     *

     * @param string $langID language ID

     *

     * @return string table $langID is stored in

     * @access private

     */

    function _getLangTable($langID)

    {

        if (isset($this->options['strings_tables'][$langID])) {

            return $this->options['strings_tables'][$langID];

        }

        return str_replace('%s', $langID, $this->options['strings_default_table']);

    }

    // }}}

    // {{{ _getLangCol()

    /**

     * Get the column a language's string is stored in

     *

     * @param string $langID language ID

     *

     * @return string column $langID is stored in

     * @access private

     */

    function _getLangCol($langID)

    {

        static $cols;

        if (!isset($cols[$langID])) {

            if (isset($this->options['string_text_col']) &&

                !empty($this->options['string_text_col'])) {

                $cols[$langID] = str_replace('%s', $langID, $this->options['string_text_col']);

            } else {

                $cols[$langID] = $langID;

            }

        }

        return $cols[$langID];

    }

    // }}}

}

?>