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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
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/**
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 * General database mover class
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 *
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 * @package    core_dtl
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 * @copyright  2008 Andrei Bautu
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 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 */
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defined('MOODLE_INTERNAL') || die();
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class database_mover extends database_exporter {
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    /** @var database_importer Importer object used to transfer data. */
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    protected $importer;
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    /** @var progress_trace Progress tracing object */
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    protected $feedback;
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    /**
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     * Object constructor.
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     *
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     * @param moodle_database $mdb_source Connection to the source database (a
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     * @see moodle_database object).
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     * @param moodle_database $mdb_target Connection to the target database (a
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     * @see moodle_database object).
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     * @param boolean $check_schema - whether or not to check that XML database
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     * schema matches the RDBMS database schema before exporting (used by
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     * @param progress_trace $feedback Progress tracing object
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     * @see export_database).
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     */
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    public function __construct(moodle_database $mdb_source, moodle_database $mdb_target,
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            $check_schema = true, progress_trace $feedback = null) {
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        if (empty($feedback)) {
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            $this->feedback = new null_progress_trace();
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        } else {
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            $this->feedback = $feedback;
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        }
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        if ($check_schema) {
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            $this->feedback->output(get_string('checkingsourcetables', 'core_dbtransfer'));
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        }
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        parent::__construct($mdb_source, $check_schema);
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        $this->feedback->output(get_string('creatingtargettables', 'core_dbtransfer'));
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        $this->importer = new database_importer($mdb_target, $check_schema);
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    }
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    /**
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     * How to use transactions during the transfer.
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     * @param string $mode 'pertable', 'allinone' or 'none'.
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     */
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    public function set_transaction_mode($mode) {
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        $this->importer->set_transaction_mode($mode);
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    }
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    /**
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     * Callback function. Calls importer's begin_database_import callback method.
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     *
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     * @param float $version the version of the system which generating the data
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     * @param string $release moodle release info
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     * @param string $timestamp the timestamp of the data (in ISO 8601) format.
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     * @param string $description a user description of the data.
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     * @return void
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     */
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    public function begin_database_export($version, $release, $timestamp, $description) {
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        $this->feedback->output(get_string('copyingtables', 'core_dbtransfer'));
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        $this->importer->begin_database_import($version, $timestamp, $description);
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    }
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    /**
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     * Callback function. Calls importer's begin_table_import callback method.
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     *
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     * @param xmldb_table $table - XMLDB object for the exported table
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     * @return void
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     */
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    public function begin_table_export(xmldb_table $table) {
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        $this->feedback->output(get_string('copyingtable', 'core_dbtransfer', $table->getName()), 1);
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        $this->importer->begin_table_import($table->getName(), $table->getHash());
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    }
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    /**
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     * Callback function. Calls importer's import_table_data callback method.
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     *
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     * @param xmldb_table $table - XMLDB object of the table from which data
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     * was retrieved
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     * @param object $data - data object (fields and values from record)
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     * @return void
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     */
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    public function export_table_data(xmldb_table $table, $data) {
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        $this->importer->import_table_data($table->getName(), $data);
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    }
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    /**
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     * Callback function. Calls importer's finish_table_import callback method.
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     * @param xmldb_table $table - XMLDB object for the exported table
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     * @return void
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     */
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    public function finish_table_export(xmldb_table $table) {
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        $this->feedback->output(get_string('done', 'core_dbtransfer', $table->getName()), 2);
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        $this->importer->finish_table_import($table->getName());
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    }
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    /**
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     * Callback function. Calls importer's finish_database_import callback method.
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     * @return void
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     */
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    public function finish_database_export() {
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        $this->importer->finish_database_import();
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    }
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}