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 restore_activity_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();

/**

 * abstract activity task that provides all the properties and common tasks to be performed

 * when one activity is being restored

 *

 * TODO: Finish phpdocs

 */

abstract class restore_activity_task extends restore_task {

    protected $info; // info related to activity gathered from backup file

    protected $modulename;  // name of the module

    protected $moduleid;    // new (target) id of the course module

    protected $oldmoduleid; // old (original) id of the course module

    protected $oldmoduleversion; // old (original) version of the module

    protected $contextid;   // new (target) context of the activity

    protected $oldcontextid;// old (original) context of the activity

    protected $activityid;  // new (target) id of the activity

    protected $oldactivityid;// old (original) id of the activity

    /**

     * Constructor - instantiates one object of this class

     */

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

        $this->info = $info;

        $this->modulename = $this->info->modulename;

        $this->moduleid = 0;

        $this->oldmoduleid = $this->info->moduleid;

        $this->oldmoduleversion = 0;

        $this->contextid = 0;

        $this->oldcontextid = 0;

        $this->activityid = 0;

        $this->oldactivityid = 0;

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

    }

    /**

     * Activity tasks have their own directory to read files

     */

    public function get_taskbasepath() {

        return $this->get_basepath() . '/' . $this->info->directory;

    }

    public function set_moduleid($moduleid) {

        $this->moduleid = $moduleid;

    }

    public function set_old_moduleversion($oldmoduleversion) {

        $this->oldmoduleversion = $oldmoduleversion;

    }

    public function set_activityid($activityid) {

        $this->activityid = $activityid;

    }

    public function set_old_activityid($activityid) {

        $this->oldactivityid = $activityid;

    }

    public function set_contextid($contextid) {

        $this->contextid = $contextid;

    }

    public function set_old_contextid($contextid) {

        $this->oldcontextid = $contextid;

    }

    public function get_modulename() {

        return $this->modulename;

    }

    public function get_moduleid() {

        return $this->moduleid;

    }

    /**

     * Returns the old course module id (cmid of activity which will be restored)

     *

     * @return int

     */

    public function get_old_moduleid() {

        return $this->oldmoduleid;

    }

    public function get_old_moduleversion() {

        return $this->oldmoduleversion;

    }

    public function get_activityid() {

        return $this->activityid;

    }

    public function get_old_activityid() {

        return $this->oldactivityid;

    }

    public function get_contextid() {

        return $this->contextid;

    }

    public function get_old_contextid() {

        return $this->oldcontextid;

    }

    /**

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

     */

    public function build() {

        // If we have decided not to restore activities, prevent anything to be built

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

            $this->built = true;

            return;

        }

        // Load he course_module estructure, generating it (with instance = 0)

        // but allowing the creation of the target context needed in following steps

        $this->add_step(new restore_module_structure_step('module_info', 'module.xml'));

        // Here we add all the common steps for any activity and, in the point of interest

        // we call to define_my_steps() is order to get the particular ones inserted in place.

        $this->define_my_steps();

        // Roles (optionally role assignments and always role overrides)

        $this->add_step(new restore_ras_and_caps_structure_step('course_ras_and_caps', 'roles.xml'));

        // Filters (conditionally)

        if ($this->get_setting_value('filters')) {

            $this->add_step(new restore_filters_structure_step('activity_filters', 'filters.xml'));

        }

        // Comments (conditionally)

        if ($this->get_setting_value('comments')) {

            $this->add_step(new restore_comments_structure_step('activity_comments', 'comments.xml'));

        }

        // Calendar events (conditionally)

        if ($this->get_setting_value('calendarevents')) {

            $this->add_step(new restore_calendarevents_structure_step('activity_calendar', 'calendar.xml'));

        }

        // Grades (module-related, rest of gradebook is restored later if possible: cats, calculations...)

        $this->add_step(new restore_activity_grades_structure_step('activity_grades', 'grades.xml'));

        // Advanced grading methods attached to the module

        $this->add_step(new restore_activity_grading_structure_step('activity_grading', 'grading.xml'));

        // Grade history. The setting 'grade_history' is handled in the step.

        $this->add_step(new restore_activity_grade_history_structure_step('activity_grade_history', 'grade_history.xml'));

        // Userscompletion (conditionally)

        if ($this->get_setting_value('userscompletion')) {

            $this->add_step(new restore_userscompletion_structure_step('activity_userscompletion', 'completion.xml'));

        }

        // Logs (conditionally)

        if ($this->get_setting_value('logs')) {

            // Legacy logs.

            $this->add_step(new restore_activity_logs_structure_step('activity_logs', 'logs.xml'));

            // New log stores.

            $this->add_step(new restore_activity_logstores_structure_step('activity_logstores', 'logstores.xml'));

        }

        // Activity competencies.

        $this->add_step(new restore_activity_competencies_structure_step('activity_competencies', 'competencies.xml'));

        // Search reindexing, if enabled and if not restoring entire course.

        if (\core_search\manager::is_indexing_enabled()) {

            $wholecourse = $this->get_target() == backup::TARGET_NEW_COURSE;

            $wholecourse = $wholecourse || ($this->setting_exists('overwrite_conf') && $this->get_setting_value('overwrite_conf'));

            if (!$wholecourse) {

                $this->add_step(new restore_activity_search_index('activity_search_index'));

            }

        }

        // The xAPI state (conditionally).

        if ($this->get_setting_value('xapistate')) {

            $this->add_step(new restore_xapistate_structure_step('activity_xapistate', 'xapistate.xml'));

        }

        // At the end, mark it as built

        $this->built = true;

    }

    /**

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

     * to skip the execution of one task completely

     */

    public function execute() {

        // Find activity_included_setting

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

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

            $this->plan->set_excluding_activities(); // Inform plan we are excluding actvities

        } 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 = $this->info->modulename . '_' . $this->info->moduleid . '_' . $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);

        }

    }

    /**

     * Define (add) particular steps that each activity can have

     */

    abstract protected function define_my_steps();

    /**

     * Define the contents in the activity that must be

     * processed by the link decoder

     */

    public static function define_decode_contents() {

        throw new coding_exception('define_decode_contents() method needs to be overridden in each subclass of restore_activity_task');

    }

    /**

     * Define the decoding rules for links belonging

     * to the activity to be executed by the link decoder

     */

    public static function define_decode_rules() {

        throw new coding_exception('define_decode_rules() method needs to be overridden in each subclass of restore_activity_task');

    }

    /**

     * Define the restore log rules that will be applied

     * by the {@link restore_logs_processor} when restoring

     * activity logs. It must return one array

     * of {@link restore_log_rule} objects

     */

    public static function define_restore_log_rules() {

        throw new coding_exception('define_restore_log_rules() method needs to be overridden in each subclass of restore_activity_task');

    }

// Protected API starts here

    /**

     * Define the common setting that any restore activity will have

     */

    protected function define_settings() {

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

        $settingprefix = $this->info->modulename . '_' . $this->info->moduleid . '_';

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

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

        // Dependent of:

        // - activities root setting

        // - section_included setting (if exists)

        $settingname = $settingprefix . 'included';

        $activity_included = new restore_activity_generic_setting($settingname, base_setting::IS_BOOLEAN, true);

        $activity_included->get_ui()->set_icon(new image_icon('monologo', get_string('pluginname', $this->modulename),

            $this->modulename, array('class' => 'iconlarge icon-post ml-1')));

        $this->add_setting($activity_included);

        // Look for "activities" root setting

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

        $activities->add_dependency($activity_included);

        // Look for "section_included" section setting (if exists)

        $settingname = 'section_' . $this->info->sectionid . '_included';

        if ($this->plan->setting_exists($settingname)) {

            $section_included = $this->plan->get_setting($settingname);

            $section_included->add_dependency($activity_included);

        }

        // Define activity_userinfo. Dependent of:

        // - users root setting

        // - section_userinfo setting (if exists)

        // - activity_included setting.

        $settingname = $settingprefix . 'userinfo';

        $defaultvalue = false;

        if (isset($this->info->settings[$settingname]) && $this->info->settings[$settingname]) { // Only enabled when available

            $defaultvalue = true;

        }

        $activity_userinfo = new restore_activity_userinfo_setting($settingname, base_setting::IS_BOOLEAN, $defaultvalue);

        if (!$defaultvalue) {

            // This is a bit hacky, but if there is no user data to restore, then

            // we replace the standard check-box with a select menu with the

            // single choice 'No', and the select menu is clever enough that if

            // there is only one choice, it just displays a static string.

            //

            // It would probably be better design to have a special UI class

            // setting_ui_checkbox_or_no, rather than this hack, but I am not

            // going to do that today.

            $activity_userinfo->set_ui(new backup_setting_ui_select($activity_userinfo, '-',

                    array(0 => get_string('no'))));

        } else {

            $activity_userinfo->get_ui()->set_label('-');

        }

        $this->add_setting($activity_userinfo);

        // Look for "users" root setting

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

        $users->add_dependency($activity_userinfo);

        // Look for "section_userinfo" section setting (if exists)

        $settingname = 'section_' . $this->info->sectionid . '_userinfo';

        if ($this->plan->setting_exists($settingname)) {

            $section_userinfo = $this->plan->get_setting($settingname);

            $section_userinfo->add_dependency($activity_userinfo);

        }

        // Look for "activity_included" setting.

        $activity_included->add_dependency($activity_userinfo);

        // End of common activity settings, let's add the particular ones.

        $this->define_my_settings();

    }

    /**

     * Define (add) particular settings that each activity can have

     */

    abstract protected function define_my_settings();

}