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