Proyectos de Subversion Moodle

<?php

// This file is part of Moodle - http://moodle.org/

//

// Moodle 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 3 of the License, or

// (at your option) any later version.

//

// Moodle 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 Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**

 * Defines backup_section_task class

 *

 * @package     core_backup

 * @subpackage  moodle2

 * @category    backup

 * @copyright   2010 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}

 * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

defined('MOODLE_INTERNAL') || die();

/**

 * section task that provides all the properties and common steps to be performed

 * when one section is being backup

 *

 * TODO: Finish phpdocs

 */

class backup_section_task extends backup_task {

    protected $sectionid;

    /**

     * Constructor - instantiates one object of this class

     */

    public function __construct($name, $sectionid, $plan = null) {

        global $DB;

        // Check section exists

        if (!$section = $DB->get_record('course_sections', array('id' => $sectionid))) {

            throw new backup_task_exception('section_task_section_not_found', $sectionid);

        }

        $this->sectionid  = $sectionid;

        parent::__construct($name, $plan);

    }

    public function get_sectionid() {

        return $this->sectionid;

    }

    /**

     * Section tasks have their own directory to write files

     */

    public function get_taskbasepath() {

        return $this->get_basepath() . '/sections/section_' . $this->sectionid;

    }

    /**

     * Create all the steps that will be part of this task

     */

    public function build() {

        // Set the backup::VAR_CONTEXTID setting to course context as far as next steps require that

        $coursectxid = context_course::instance($this->get_courseid())->id;

        $this->add_setting(new backup_activity_generic_setting(backup::VAR_CONTEXTID, base_setting::IS_INTEGER, $coursectxid));

        // Add some extra settings that related processors are going to need

        $this->add_setting(new backup_activity_generic_setting(backup::VAR_SECTIONID, base_setting::IS_INTEGER, $this->sectionid));

        $this->add_setting(new backup_activity_generic_setting(backup::VAR_COURSEID, base_setting::IS_INTEGER, $this->get_courseid()));

        // Create the section directory

        $this->add_step(new create_taskbasepath_directory('create_section_directory'));

        // Create the section.xml common file (course_sections)

        $this->add_step(new backup_section_structure_step('section_commons', 'section.xml'));

        // Generate the inforef file (must be after ALL steps gathering annotations of ANY type)

        $this->add_step(new backup_inforef_structure_step('section_inforef', 'inforef.xml'));

        // Migrate the already exported inforef entries to final ones

        $this->add_step(new move_inforef_annotations_to_final('migrate_inforef'));

        // At the end, mark it as built

        $this->built = true;

    }

    /**

     * Exceptionally override the execute method, so, based in the section_included setting, we are able

     * to skip the execution of one task completely

     */

    public function execute() {

        // Find section_included_setting

        if (!$this->get_setting_value('included')) {

            $this->log('section skipped by _included setting', backup::LOG_DEBUG, $this->name);

        } else { // Setting tells us it's ok to execute

            parent::execute();

        }

    }

    /**

     * Specialisation that, first of all, looks for the setting within

     * the task with the the prefix added and later, delegates to parent

     * without adding anything

     */

    public function get_setting($name) {

        $namewithprefix = 'section_' . $this->sectionid . '_' . $name;

        $result = null;

        foreach ($this->settings as $key => $setting) {

            if ($setting->get_name() == $namewithprefix) {

                if ($result != null) {

                    throw new base_task_exception('multiple_settings_by_name_found', $namewithprefix);

                } else {

                    $result = $setting;

                }

            }

        }

        if ($result) {

            return $result;

        } else {

            // Fallback to parent

            return parent::get_setting($name);

        }

    }

// Protected API starts here

    /**

     * Define the common setting that any backup section will have

     */

    protected function define_settings() {

        global $DB;

        // All the settings related to this activity will include this prefix

        $settingprefix = 'section_' . $this->sectionid . '_';

        // All these are common settings to be shared by all sections

        $section = $DB->get_record('course_sections', array('id' => $this->sectionid), '*', MUST_EXIST);

        $course = $DB->get_record('course', array('id' => $section->course), '*', MUST_EXIST);

        // Define section_included (to decide if the whole task must be really executed)

        $settingname = $settingprefix . 'included';

        $section_included = new backup_section_included_setting($settingname, base_setting::IS_BOOLEAN, true);

        $section_included->get_ui()->set_label(get_section_name($course, $section));

        $this->add_setting($section_included);

        // Define section_userinfo. Dependent of:

        // - users root setting

        // - section_included setting

        $settingname = $settingprefix . 'userinfo';

        $section_userinfo = new backup_section_userinfo_setting($settingname, base_setting::IS_BOOLEAN, true);

        $section_userinfo->get_ui()->set_label(get_string('includeuserinfo','backup'));

        $this->add_setting($section_userinfo);

        // Look for "users" root setting

        $users = $this->plan->get_setting('users');

        $users->add_dependency($section_userinfo);

        // Look for "section_included" section setting

        $section_included->add_dependency($section_userinfo);

    }

}