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/>.

/**

 * Core Report class of graphs reporting plugin

 *

 * @package    scormreport_graphs

 * @copyright  2012 Ankit Kumar Agarwal

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

 */

namespace scormreport_graphs;

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

use context_module;

use core\chart_bar;

use core\chart_series;

use moodle_url;

/**

 * Main class to control the graphs reporting

 *

 * @package    scormreport_graphs

 * @copyright  2012 Ankit Kumar Agarwal

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

 */

class report extends \mod_scorm\report {

    /** Number of bars. */

    const BANDS = 11;

    /** Range of each bar. */

    const BANDWIDTH = 10;

    /**

     * Get the data for the report.

     *

     * @param int $scoid The sco ID.

     * @param array $allowedlist The SQL and params to get the userlist.

     * @return array of data indexed per bar.

     */

    protected function get_data($scoid, $allowedlistsql) {

        global $DB;

        $data = array_fill(0, self::BANDS, 0);

        list($allowedlist, $params) = $allowedlistsql;

        $params = array_merge($params, ['scoid' => $scoid]);

        // Construct the SQL.

        $sql = "SELECT DISTINCT " . $DB->sql_concat('a.userid', '\'#\'', 'COALESCE(a.attempt, 0)') . " AS uniqueid,

                       a.userid AS userid,

                       a.scormid AS scormid,

                       a.attempt AS attempt,

                       v.scoid AS scoid

                  FROM {scorm_attempt} a

                  JOIN {scorm_scoes_value} v ON v.attemptid = a.id

                 WHERE a.userid IN ({$allowedlist}) AND v.scoid = :scoid";

        $attempts = $DB->get_records_sql($sql, $params);

        $usergrades = [];

        foreach ($attempts as $attempt) {

            if ($trackdata = scorm_get_tracks($scoid, $attempt->userid, $attempt->attempt)) {

                if (isset($trackdata->score_raw)) {

                    $score = (int) $trackdata->score_raw;

                    if (empty($trackdata->score_min)) {

                        $minmark = 0;

                    } else {

                        $minmark = $trackdata->score_min;

                    }

                    // TODO MDL-55004: Get this value from elsewhere?

                    if (empty($trackdata->score_max)) {

                        $maxmark = 100;

                    } else {

                        $maxmark = $trackdata->score_max;

                    }

                    $range = ($maxmark - $minmark);

                    if (empty($range)) {

                        continue;

                    }

                    $percent = round((($score * 100) / $range), 2);

                    if (empty($usergrades[$attempt->userid]) || !isset($usergrades[$attempt->userid])

                            || ($percent > $usergrades[$attempt->userid]) || ($usergrades[$attempt->userid] === '*')) {

                        $usergrades[$attempt->userid] = $percent;

                    }

                    unset($percent);

                } else {

                    // User has made an attempt but either SCO was not able to record the score or something else is broken in SCO.

                    if (!isset($usergrades[$attempt->userid])) {

                        $usergrades[$attempt->userid] = '*';

                    }

                }

            }

        }

        // Recording all users who attempted the SCO, but resulting data was invalid.

        foreach ($usergrades as $userpercent) {

            if ($userpercent === '*') {

                $data[0]++;

            } else {

                $gradeband = floor($userpercent / self::BANDWIDTH);

                if ($gradeband != (self::BANDS - 1)) {

                    $gradeband++;

                }

                $data[$gradeband]++;

            }

        }

        return $data;

    }

    /**

     * Displays the full report.

     *

     * @param \stdClass $scorm full SCORM object

     * @param \stdClass $cm - full course_module object

     * @param \stdClass $course - full course object

     * @param string $download - type of download being requested

     * @return void

     */

    public function display($scorm, $cm, $course, $download) {

        global $DB, $OUTPUT, $PAGE;

        $contextmodule = context_module::instance($cm->id);

        $actionbar = new \mod_scorm\output\actionbar($cm->id, false, 0);

        $renderer = $PAGE->get_renderer('mod_scorm');

        echo $renderer->report_actionbar($actionbar);

        if ($groupmode = groups_get_activity_groupmode($cm)) {   // Groups are being used.

            groups_print_activity_menu($cm, new moodle_url($PAGE->url));

        }

        // Find out current restriction.

        $group = groups_get_activity_group($cm, true);

        $allowedlistsql = get_enrolled_sql($contextmodule, 'mod/scorm:savetrack', (int) $group);

        // Labels.

        $labels = [get_string('invaliddata', 'scormreport_graphs')];

        for ($i = 1; $i <= self::BANDS - 1; $i++) {

            $labels[] = ($i - 1) * self::BANDWIDTH . ' - ' . $i * self::BANDWIDTH;

        }

        if ($scoes = $DB->get_records('scorm_scoes', array("scorm" => $scorm->id), 'sortorder, id')) {

            foreach ($scoes as $sco) {

                if ($sco->launch != '') {

                    $data = $this->get_data($sco->id, $allowedlistsql);

                    $series = new chart_series($sco->title, $data);

                    $chart = new chart_bar();

                    $chart->set_labels($labels);

                    $chart->add_series($series);

                    $chart->get_xaxis(0, true)->set_label(get_string('percent', 'scormreport_graphs'));

                    $yaxis = $chart->get_yaxis(0, true);

                    $yaxis->set_label(get_string('participants', 'scormreport_graphs'));

                    $yaxis->set_stepsize(max(1, round(max($data) / 10)));

                    echo $OUTPUT->heading($sco->title, 3);

                    echo $OUTPUT->render($chart);

                }

            }

        }

    }

}