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/>.

/**

 * A moodleform to allow the editing of a calculated grade item

 *

 * @package   core_grades

 * @copyright 2007 Petr Skoda

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

 */

if (!defined('MOODLE_INTERNAL')) {

    die('Direct access to this script is forbidden.');    ///  It must be included from a Moodle page

}

require_once $CFG->libdir.'/formslib.php';

class edit_calculation_form extends moodleform {

    public $available;

    public $noidnumbers;

    function definition() {

        global $COURSE;

        $mform =& $this->_form;

        $itemid = $this->_customdata['itemid'];

        $this->available = grade_item::fetch_all(array('courseid'=>$COURSE->id));

        $this->noidnumbers = array();

        // All items that have no idnumbers are added to a separate section of the form (hidden by default),

        // enabling the user to assign idnumbers to these grade_items.

        foreach ($this->available as $item) {

            if (empty($item->idnumber)) {

                $this->noidnumbers[$item->id] = $item;

                unset($this->available[$item->id]);

            }

            if ($item->id == $itemid) { // Do not include the current grade_item in the available section

                unset($this->available[$item->id]);

            }

        }

/// visible elements

        $mform->addElement('header', 'general', get_string('gradeitem', 'grades'));

        $mform->addElement('static', 'itemname', get_string('itemname', 'grades'));

        $mform->addElement('textarea', 'calculation', get_string('calculation', 'grades'), 'cols="60" rows="5"');

        $mform->addHelpButton('calculation', 'calculation', 'grades');

        $mform->setForceLtr('calculation');

/// hidden params

        $mform->addElement('hidden', 'id', 0);

        $mform->setType('id', PARAM_INT);

        $mform->addElement('hidden', 'courseid', 0);

        $mform->setType('courseid', PARAM_INT);

        $mform->addElement('hidden', 'section', 0);

        $mform->setType('section', PARAM_ALPHA);

        $mform->setDefault('section', 'calculation');

/// add return tracking info

        $gpr = $this->_customdata['gpr'];

        $gpr->add_mform_elements($mform);

        $this->add_action_buttons();

    }

    function definition_after_data() {

        global $CFG, $COURSE;

        $mform =& $this->_form;

    }

/// perform extra validation before submission

    function validation($data, $files) {

        $errors = parent::validation($data, $files);

        $mform =& $this->_form;

        // check the calculation formula

        if ($data['calculation'] != '') {

            $grade_item = grade_item::fetch(array('id'=>$data['id'], 'courseid'=>$data['courseid']));

            $calculation = calc_formula::unlocalize(stripslashes($data['calculation']));

            $result = $grade_item->validate_formula($calculation);

            if ($result !== true) {

                $errors['calculation'] = $result;

            }

        }

        return $errors;

    }

}