235 lines
11 KiB
PHP
235 lines
11 KiB
PHP
<?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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* A scheduled task for emailing certificates.
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*
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* @package mod_customcert
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* @copyright 2017 Mark Nelson <markn@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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namespace mod_customcert\task;
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defined('MOODLE_INTERNAL') || die();
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/**
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* A scheduled task for emailing certificates.
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*
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* @package mod_customcert
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* @copyright 2017 Mark Nelson <markn@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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class email_certificate_task extends \core\task\scheduled_task {
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/**
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* Get a descriptive name for this task (shown to admins).
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*
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* @return string
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*/
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public function get_name() {
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return get_string('taskemailcertificate', 'customcert');
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}
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/**
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* Execute.
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*/
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public function execute() {
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global $DB, $PAGE;
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// Get all the certificates that have requested someone get emailed.
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$emailotherslengthsql = $DB->sql_length('c.emailothers');
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$sql = "SELECT c.*, ct.id as templateid, ct.name as templatename, ct.contextid, co.id as courseid,
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co.fullname as coursefullname, co.shortname as courseshortname
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FROM {customcert} c
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JOIN {customcert_templates} ct
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ON c.templateid = ct.id
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JOIN {course} co
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ON c.course = co.id
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WHERE (c.emailstudents = :emailstudents
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OR c.emailteachers = :emailteachers
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OR $emailotherslengthsql >= 3)";
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if (!$customcerts = $DB->get_records_sql($sql, array('emailstudents' => 1, 'emailteachers' => 1))) {
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return;
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}
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// The renderers used for sending emails.
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$htmlrenderer = $PAGE->get_renderer('mod_customcert', 'email', 'htmlemail');
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$textrenderer = $PAGE->get_renderer('mod_customcert', 'email', 'textemail');
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foreach ($customcerts as $customcert) {
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// Get the context.
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$context = \context::instance_by_id($customcert->contextid);
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// Get the person we are going to send this email on behalf of.
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// Look through the teachers.
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if ($teachers = get_enrolled_users($context, 'moodle/course:update')) {
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$teachers = sort_by_roleassignment_authority($teachers, $context);
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$userfrom = reset($teachers);
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} else { // Ok, no teachers, use administrator name.
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$userfrom = get_admin();
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}
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$courseshortname = format_string($customcert->courseshortname, true, array('context' => $context));
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$coursefullname = format_string($customcert->coursefullname, true, array('context' => $context));
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$certificatename = format_string($customcert->name, true, array('context' => $context));
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// Used to create the email subject.
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$info = new \stdClass;
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$info->coursename = $courseshortname; // Added for BC, so users who have edited the string don't lose this value.
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$info->courseshortname = $courseshortname;
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$info->coursefullname = $coursefullname;
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$info->certificatename = $certificatename;
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// Get a list of all the issues.
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$userfields = get_all_user_name_fields(true, 'u');
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$sql = "SELECT u.id, u.username, $userfields, u.email, ci.id as issueid, ci.emailed
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FROM {customcert_issues} ci
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JOIN {user} u
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ON ci.userid = u.id
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WHERE ci.customcertid = :customcertid";
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$issuedusers = $DB->get_records_sql($sql, array('customcertid' => $customcert->id));
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// Now, get a list of users who can access the certificate but have not yet.
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$enrolledusers = get_enrolled_users(\context_course::instance($customcert->courseid), 'mod/customcert:view');
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foreach ($enrolledusers as $enroluser) {
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// Check if the user has already been issued.
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if (in_array($enroluser->id, array_keys((array) $issuedusers))) {
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continue;
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}
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// Now check if the certificate is not visible to the current user.
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$cm = get_fast_modinfo($customcert->courseid, $enroluser->id)->instances['customcert'][$customcert->id];
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if (!$cm->uservisible) {
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continue;
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}
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// Don't want to email those with the capability to manage the certificate.
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if (has_capability('mod/customcert:manage', $context, $enroluser->id)) {
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continue;
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}
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// Check that they have passed the required time.
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if (!empty($customcert->requiredtime)) {
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if (\mod_customcert\certificate::get_course_time($customcert->courseid,
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$enroluser->id) < ($customcert->requiredtime * 60)) {
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continue;
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}
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}
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// Ensure the cert hasn't already been issued, e.g via the UI (view.php) - a race condition.
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$issueid = $DB->get_field('customcert_issues', 'id',
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array('userid' => $enroluser->id, 'customcertid' => $customcert->id));
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if (empty($issueid)) {
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// Ok, issue them the certificate.
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$issueid = \mod_customcert\certificate::issue_certificate($customcert->id, $enroluser->id);
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}
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// Add them to the array so we email them.
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$enroluser->issueid = $issueid;
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$enroluser->emailed = 0;
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$issuedusers[] = $enroluser;
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}
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// Remove all the users who have already been emailed.
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foreach ($issuedusers as $key => $issueduser) {
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if ($issueduser->emailed) {
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unset($issuedusers[$key]);
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}
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}
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// If there are no users to email we can return early.
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if (!$issuedusers) {
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continue;
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}
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// Create a directory to store the PDF we will be sending.
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$tempdir = make_temp_directory('certificate/attachment');
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if (!$tempdir) {
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return;
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}
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// Now, email the people we need to.
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foreach ($issuedusers as $user) {
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$userfullname = fullname($user);
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// Now, get the PDF.
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$template = new \stdClass();
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$template->id = $customcert->templateid;
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$template->name = $customcert->templatename;
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$template->contextid = $customcert->contextid;
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$template = new \mod_customcert\template($template);
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$filecontents = $template->generate_pdf(false, $user->id, true);
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// Set the name of the file we are going to send.
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$filename = $courseshortname . '_' . $certificatename;
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$filename = \core_text::entities_to_utf8($filename);
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$filename = strip_tags($filename);
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$filename = rtrim($filename, '.');
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$filename = str_replace('&', '_', $filename) . '.pdf';
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// Create the file we will be sending.
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$tempfile = $tempdir . '/' . md5(microtime() . $user->id) . '.pdf';
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file_put_contents($tempfile, $filecontents);
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if ($customcert->emailstudents) {
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$renderable = new \mod_customcert\output\email_certificate(true, $userfullname, $courseshortname,
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$coursefullname, $certificatename, $customcert->contextid);
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$subject = get_string('emailstudentsubject', 'customcert', $info);
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$message = $textrenderer->render($renderable);
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$messagehtml = $htmlrenderer->render($renderable);
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email_to_user($user, fullname($userfrom), $subject, $message, $messagehtml, $tempfile, $filename);
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}
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if ($customcert->emailteachers) {
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$renderable = new \mod_customcert\output\email_certificate(false, $userfullname, $courseshortname,
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$coursefullname, $certificatename, $customcert->contextid);
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$subject = get_string('emailnonstudentsubject', 'customcert', $info);
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$message = $textrenderer->render($renderable);
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$messagehtml = $htmlrenderer->render($renderable);
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foreach ($teachers as $teacher) {
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email_to_user($teacher, fullname($userfrom), $subject, $message, $messagehtml, $tempfile,
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$filename);
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}
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}
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if (!empty($customcert->emailothers)) {
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$others = explode(',', $customcert->emailothers);
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foreach ($others as $email) {
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$email = trim($email);
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if (validate_email($email)) {
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$renderable = new \mod_customcert\output\email_certificate(false, $userfullname,
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$courseshortname, $coursefullname, $certificatename, $customcert->contextid);
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$subject = get_string('emailnonstudentsubject', 'customcert', $info);
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$message = $textrenderer->render($renderable);
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$messagehtml = $htmlrenderer->render($renderable);
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$emailuser = new \stdClass();
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$emailuser->id = -1;
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$emailuser->email = $email;
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email_to_user($emailuser, fullname($userfrom), $subject, $message, $messagehtml, $tempfile,
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$filename);
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}
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}
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}
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// Set the field so that it is emailed.
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$DB->set_field('customcert_issues', 'emailed', 1, array('id' => $user->issueid));
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}
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}
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}
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}
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