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<?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/>.
/**
* No recent accesses.
*
* @package core_course
* @copyright 2019 David Monllaó {@link http://www.davidmonllao.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace core_course\analytics\target;
defined('MOODLE_INTERNAL') || die();
/**
* No recent accesses.
*
* @package core_course
* @copyright 2019 David Monllaó {@link http://www.davidmonllao.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class no_recent_accesses extends course_enrolments {
/**
* Machine learning backends are not required to predict.
*
* @return bool
*/
public static function based_on_assumptions() {
return true;
}
/**
* Returns the name.
*
* If there is a corresponding '_help' string this will be shown as well.
*
* @return \lang_string
*/
public static function get_name() : \lang_string {
return new \lang_string('target:norecentaccesses', 'course');
}
/**
* Returns the body message for the insight.
*
* @param \context $context
* @param string $contextname
* @param \stdClass $user
* @param \moodle_url $insighturl
* @return array The plain text message and the HTML message
*/
public function get_insight_body(\context $context, string $contextname, \stdClass $user, \moodle_url $insighturl): array {
global $OUTPUT;
$a = (object)['coursename' => $contextname, 'userfirstname' => $user->firstname];
$fullmessage = get_string('norecentaccessesinfomessage', 'course', $a) . PHP_EOL . PHP_EOL . $insighturl->out(false);
$fullmessagehtml = $OUTPUT->render_from_template('core_analytics/insight_info_message',
['url' => $insighturl->out(false), 'insightinfomessage' => get_string('norecentaccessesinfomessage', 'course', $a)]
);
return [$fullmessage, $fullmessagehtml];
}
/**
* Only past stuff whose start matches the course start.
*
* @param \core_analytics\local\time_splitting\base $timesplitting
* @return bool
*/
public function can_use_timesplitting(\core_analytics\local\time_splitting\base $timesplitting): bool {
return ($timesplitting instanceof \core_analytics\local\time_splitting\past_periodic);
}
/**
* Discards courses that are not yet ready to be used for prediction.
*
* @param \core_analytics\analysable $course
* @param bool $fortraining
* @return true|string
*/
public function is_valid_analysable(\core_analytics\analysable $course, $fortraining = true) {
if (!$course->was_started()) {
return get_string('coursenotyetstarted', 'course');
}
if (!$this->students = $course->get_students()) {
return get_string('nocoursestudents', 'course');
}
if ($course->get_end() && $course->get_end() < $course->get_start()) {
return get_string('errorendbeforestart', 'course');
}
// Finished courses can not be used to get predictions.
if (!$fortraining && $course->is_finished()) {
return get_string('coursealreadyfinished', 'course');
}
return true;
}
/**
* Do the user has any read action in the course?
*
* @param int $sampleid
* @param \core_analytics\analysable $analysable
* @param int $starttime
* @param int $endtime
* @return float|null 0 -> accesses, 1 -> no accesses.
*/
protected function calculate_sample($sampleid, \core_analytics\analysable $analysable, $starttime = false, $endtime = false) {
if (!$this->enrolment_active_during_analysis_time($sampleid, $starttime, $endtime)) {
// We should not use this sample as the analysis results could be misleading.
return null;
}
$readactions = $this->retrieve('\core\analytics\indicator\any_course_access', $sampleid);
if ($readactions == \core\analytics\indicator\any_course_access::get_min_value()) {
return 1;
}
return 0;
}
}