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#48 Added task and settings responsible for emailing certificates

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Mark Nelson 2017-02-02 17:17:41 +08:00
parent fa1bfc0436
commit 6eb8e5b27c
19 changed files with 982 additions and 9 deletions
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classes/task/email_certificate_task.php Normal file
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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/>.
/**
* A scheduled task for emailing certificates.
*
* @package mod_customcert
* @copyright 2017 Mark Nelson <markn@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace mod_customcert\task;
defined('MOODLE_INTERNAL') || die();
/**
* A scheduled task for emailing certificates.
*
* @package mod_customcert
* @copyright 2017 Mark Nelson <markn@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class email_certificate_task extends \core\task\scheduled_task {
/**
* Get a descriptive name for this task (shown to admins).
*
* @return string
*/
public function get_name() {
return get_string('taskemailcertificate', 'customcert');
}
/**
* Execute.
*/
public function execute() {
global $DB, $PAGE;
// Get all the certificates that have requested someone get emailed.
$sql = "SELECT c.*, ct.id as templateid, ct.name as templatename, ct.contextid, co.id as courseid,
co.shortname as coursename
FROM {customcert} c
JOIN {customcert_templates} ct
ON c.templateid = ct.id
JOIN {course} co
ON c.course = co.id
WHERE (c.emailstudents = :emailstudents
OR c.emailteachers = :emailteachers
OR c.emailothers != '')";
if ($customcerts = $DB->get_records_sql($sql, array('emailstudents' => 1, 'emailteachers' => 1))) {
// The renderers used for sending emails.
$htmlrenderer = $PAGE->get_renderer('mod_customcert', 'email', 'htmlemail');
$textrenderer = $PAGE->get_renderer('mod_customcert', 'email', 'textemail');
foreach ($customcerts as $customcert) {
// Get the context.
$context = \context::instance_by_id($customcert->contextid);
// Get the person we are going to send this email on behalf of.
// Look through the teachers.
if ($teachers = get_users_by_capability($context, 'moodle/course:update', 'u.*', 'u.id ASC',
'', '', '', '', false, true)) {
$teachers = sort_by_roleassignment_authority($teachers, $context);
$userfrom = reset($teachers);
} else { // Ok, no teachers, use administrator name.
$userfrom = get_admin();
}
$coursename = format_string($customcert->coursename, true, array('context' => $context));
$certificatename = format_string($customcert->name, true, array('context' => $context));
// Used to create the email subject.
$info = new \stdClass;
$info->coursename = $coursename;
$info->certificatename = $certificatename;
// Get a list of issues that have not yet been emailed.
$userfields = get_all_user_name_fields(true, 'u');
$sql = "SELECT u.id, u.username, $userfields, u.email, ci.id as issueid
FROM {customcert_issues} ci
JOIN {user} u
ON ci.userid = u.id
WHERE ci.customcertid = :customcertid
AND emailed = :emailed";
$issuedusers = $DB->get_records_sql($sql, array('customcertid' => $customcert->id,
'emailed' => 0));
// Now, get a list of users who can access the certificate but have not yet.
$enrolledusers = get_enrolled_users(\context_course::instance($customcert->courseid), 'mod/customcert:view');
foreach ($enrolledusers as $enroluser) {
// Check if the user has already been issued.
if (in_array($enroluser->id, array_keys((array) $issuedusers))) {
continue;
}
// Now check if the certificate is not visible to the current user.
$cm = get_fast_modinfo($customcert->courseid, $enroluser->id)->instances['customcert'][$customcert->id];
if (!$cm->uservisible) {
continue;
}
// Don't want to email those with the capability to manage the certificate.
if (has_capability('mod/customcert:manage', $context, $enroluser->id)) {
continue;
}
// Check that they have passed the required time.
if (\mod_customcert\certificate::get_course_time($customcert->courseid, $enroluser->id) <
($customcert->requiredtime * 60)) {
continue;
}
// Ok, issue them the certificate.
$customcertissue = new \stdClass();
$customcertissue->customcertid = $customcert->id;
$customcertissue->userid = $enroluser->id;
$customcertissue->code = \mod_customcert\certificate::generate_code();
$customcertissue->emailed = 0;
$customcertissue->timecreated = time();
// Insert the record into the database.
$issueid = $DB->insert_record('customcert_issues', $customcertissue);
// Add them to the array so we email them.
$enroluser->issueid = $issueid;
$issuedusers[] = $enroluser;
}
// Now, email the people we need to.
if ($issuedusers) {
foreach ($issuedusers as $user) {
$userfullname = fullname($user);
// Create a directory to store the PDF we will be sending.
$tempdir = make_temp_directory('certificate/attachment');
if (!$tempdir) {
return false;
}
// Now, get the PDF.
$template = new \stdClass();
$template->id = $customcert->templateid;
$template->name = $customcert->templatename;
$template->contextid = $customcert->contextid;
$template = new \mod_customcert\template($template);
$filecontents = $template->generate_pdf(false, $user->id, true);
// Set the name of the file we are going to send.
$filename = $coursename . '_' . $certificatename;
$filename = \core_text::entities_to_utf8($filename);
$filename = strip_tags($filename);
$filename = rtrim($filename, '.');
$filename = str_replace('&', '_', $filename) . '.pdf';
// Create the file we will be sending.
$tempfile = $tempdir . '/' . md5(microtime() . $user->id) . '.pdf';
file_put_contents($tempfile, $filecontents);
if ($customcert->emailstudents) {
$renderable = new \mod_customcert\output\email_certificate(true, $userfullname, $coursename,
$certificatename, $customcert->contextid);
$subject = get_string('emailstudentsubject', 'customcert', $info);
$message = $textrenderer->render($renderable);
$messagehtml = $htmlrenderer->render($renderable);
email_to_user($user, fullname($userfrom), $subject, $message, $messagehtml, $tempfile, $filename);
}
if ($customcert->emailteachers) {
$renderable = new \mod_customcert\output\email_certificate(false, $userfullname, $coursename,
$certificatename, $customcert->contextid);
$subject = get_string('emailnonstudentsubject', 'customcert', $info);
$message = $textrenderer->render($renderable);
$messagehtml = $htmlrenderer->render($renderable);
foreach ($teachers as $teacher) {
email_to_user($teacher, fullname($userfrom), $subject, $message, $messagehtml, $tempfile,
$filename);
}
}
if (!empty($customcert->emailothers)) {
$others = explode(',', $customcert->emailothers);
foreach ($others as $email) {
$email = trim($email);
if (validate_email($email)) {
$renderable = new \mod_customcert\output\email_certificate(false, $userfullname, $coursename,
$certificatename, $customcert->contextid);
$subject = get_string('emailnonstudentsubject', 'customcert', $info);
$message = $textrenderer->render($renderable);
$messagehtml = $htmlrenderer->render($renderable);
$emailuser = new \stdClass();
$emailuser->id = -1;
$emailuser->email = $email;
email_to_user($emailuser, fullname($userfrom), $subject, $message, $messagehtml, $tempfile,
$filename);
}
}
}
// Set the field so that it is emailed.
$DB->set_field('customcert_issues', 'emailed', 1, array('id' => $user->issueid));
}
}
}
}
}
}