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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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* assignment_base is the base class for assignment types
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*
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* This class provides all the functionality for an assignment
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*
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* @package mod_assignment
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* @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
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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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/**
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* Adds an assignment instance
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*
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* Only used by generators so we can create old assignments to test the upgrade.
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*
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* @param stdClass $assignment
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* @param mod_assignment_mod_form $mform
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* @return int intance id
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*/
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function assignment_add_instance($assignment, $mform = null) {
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global $DB;
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$assignment->timemodified = time();
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$assignment->courseid = $assignment->course;
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$returnid = $DB->insert_record("assignment", $assignment);
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$assignment->id = $returnid;
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return $returnid;
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}
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/**
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* Deletes an assignment instance
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*
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* @param $id
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*/
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function assignment_delete_instance($id){
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global $CFG, $DB;
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if (! $assignment = $DB->get_record('assignment', array('id'=>$id))) {
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return false;
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}
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$result = true;
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// Now get rid of all files
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$fs = get_file_storage();
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if ($cm = get_coursemodule_from_instance('assignment', $assignment->id)) {
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$context = context_module::instance($cm->id);
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$fs->delete_area_files($context->id);
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}
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if (! $DB->delete_records('assignment_submissions', array('assignment'=>$assignment->id))) {
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$result = false;
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}
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if (! $DB->delete_records('event', array('modulename'=>'assignment', 'instance'=>$assignment->id))) {
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$result = false;
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}
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grade_update('mod/assignment', $assignment->course, 'mod', 'assignment', $assignment->id, 0, NULL, array('deleted'=>1));
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// We must delete the module record after we delete the grade item.
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if (! $DB->delete_records('assignment', array('id'=>$assignment->id))) {
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$result = false;
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}
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return $result;
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}
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/**
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* @param string $feature FEATURE_xx constant for requested feature
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* @return mixed True if module supports feature, false if not, null if doesn't know or string for the module purpose.
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*/
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function assignment_supports($feature) {
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switch($feature) {
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case FEATURE_BACKUP_MOODLE2: return true;
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case FEATURE_MOD_PURPOSE: return MOD_PURPOSE_ASSESSMENT;
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default: return null;
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}
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}
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