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 * @package    enrol_paypal
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 * @package    enrol_paypal
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 * @copyright  2010 Eugene Venter
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 * @copyright  2010 Eugene Venter
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 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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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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 */
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use core\output\single_button;
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defined('MOODLE_INTERNAL') || die();
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use core_enrol\output\enrol_page;
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 29 
 
29 
/**
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/**
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 * Paypal enrolment plugin implementation.
 31 
 * Paypal enrolment plugin implementation.
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     * Add new instance of enrol plugin.
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     * Add new instance of enrol plugin.
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     * @param object $course
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     * @param object $course
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     * @param array $fields instance fields
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     * @param array $fields instance fields
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     * @return int id of new instance, null if can not be created
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     * @return int id of new instance, null if can not be created
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     */
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     */
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    public function add_instance($course, array $fields = null) {
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    public function add_instance($course, ?array $fields = null) {
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        if ($fields && !empty($fields['cost'])) {
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        if ($fields && !empty($fields['cost'])) {
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            $fields['cost'] = unformat_float($fields['cost']);
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            $fields['cost'] = unformat_float($fields['cost']);
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        }
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        }
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        return parent::add_instance($course, $fields);
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        return parent::add_instance($course, $fields);
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    }
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    }
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            $data->cost = unformat_float($data->cost);
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            $data->cost = unformat_float($data->cost);
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        }
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        }
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        return parent::update_instance($instance, $data);
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        return parent::update_instance($instance, $data);
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    }
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    }
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    /**
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     * Creates course enrol form, checks if form submitted
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     * and enrols user if necessary. It can also redirect.
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     *
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     * @param stdClass $instance
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     * @return string html text, usually a form in a text box
 150 
 
156 
     */
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    #[\Override]
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    function enrol_page_hook(stdClass $instance) {
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    public function enrol_page_hook(stdClass $instance) {
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        global $CFG, $USER, $OUTPUT, $PAGE, $DB;
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        ob_start();
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        global $CFG, $USER, $OUTPUT, $PAGE, $DB;
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162 
        if ($DB->record_exists('user_enrolments', array('userid'=>$USER->id, 'enrolid'=>$instance->id))) {
 155 
        if ($DB->record_exists('user_enrolments', ['userid' => $USER->id, 'enrolid' => $instance->id])) {
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            return ob_get_clean();
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            return '';
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        }
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        }
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 158 
 
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        if ($instance->enrolstartdate != 0 && $instance->enrolstartdate > time()) {
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        if ($instance->enrolstartdate != 0 && $instance->enrolstartdate > time()) {
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            return ob_get_clean();
 160 
            return '';
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        }
 161 
        }
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        if ($instance->enrolenddate != 0 && $instance->enrolenddate < time()) {
 163 
        if ($instance->enrolenddate != 0 && $instance->enrolenddate < time()) {
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            return ob_get_clean();
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        }
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        $course = $DB->get_record('course', array('id'=>$instance->courseid));
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        $context = context_course::instance($course->id);
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        $shortname = format_string($course->shortname, true, array('context' => $context));
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        $strloginto = get_string("loginto", "", $shortname);
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        $strcourses = get_string("courses");
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        // Pass $view=true to filter hidden caps if the user cannot see them
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        if ($users = get_users_by_capability($context, 'moodle/course:update', 'u.*', 'u.id ASC',
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                                             '', '', '', '', false, true)) {
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            $users = sort_by_roleassignment_authority($users, $context);
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            return '';
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            $teacher = array_shift($users);
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        }
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        } else {
 166 
 
187 
            $teacher = false;
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        $course = $DB->get_record('course', ['id' => $instance->courseid]);
188 
        }
 168 
        $context = context_course::instance($course->id);
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        if ( (float) $instance->cost <= 0 ) {
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            $cost = (float) $this->get_config('cost');
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        if ( (float) $instance->cost <= 0 ) {
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            $cost = (float) $this->get_config('cost');
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        } else {
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            $cost = (float) $instance->cost;
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        }
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        $name = $this->get_instance_name($instance);
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        if (abs($cost) < 0.01) {
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            // No cost, other enrolment methods (instances) should be used.
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        } else {
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            $notification = new \core\output\notification(get_string('nocost', 'enrol_paypal'), 'error', false);
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            $cost = (float) $instance->cost;
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            $notification->set_extra_classes(['mb-0']);
194 
        }
 182 
            $enrolpage = new enrol_page(
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                instance: $instance,
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        if (abs($cost) < 0.01) { // no cost, other enrolment methods (instances) should be used
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                header: $name,
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            echo '<p>'.get_string('nocost', 'enrol_paypal').'</p>';
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        } else {
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                body: $OUTPUT->render($notification));
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            return $OUTPUT->render($enrolpage);
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            // Calculate localised and "." cost, make sure we send PayPal the same value,
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        } else {
201 
            // please note PayPal expects amount with 2 decimal places and "." separator.
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            // Calculate localised and "." cost, make sure we send PayPal the same value,
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            $localisedcost = format_float($cost, 2, true);
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            // please note PayPal expects amount with 2 decimal places and "." separator.
203 
            $cost = format_float($cost, 2, false);
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            $localisedcost = format_float($cost, 2, true);
204 
 
 191 
            $cost = format_float($cost, 2, false);
205 
            if (isguestuser()) { // force login only for guest user, not real users with guest role
 192 
 
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                $wwwroot = $CFG->wwwroot;
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            $body = $OUTPUT->render_from_template('enrol_paypal/enrol_page',
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                echo '<div class="mdl-align"><p>'.get_string('paymentrequired').'</p>';
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                ['currency' => $instance->currency, 'cost' => $localisedcost]);
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                echo '<p><b>'.get_string('cost').": $instance->currency $localisedcost".'</b></p>';
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            if (isguestuser() || !isloggedin()) {
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                echo '<p><a href="'.$wwwroot.'/login/">'.get_string('loginsite').'</a></p>';
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                $button = new single_button(new moodle_url(get_login_url()), get_string('loginsite'), 'get',
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                echo '</div>';
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                    single_button::BUTTON_PRIMARY);
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            } else {
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                // Sanitise some fields before building the PayPal form.
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                $coursefullname  = format_string($course->fullname, true, ['context' => $context]);
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                $courseshortname = format_string($course->shortname, true, ['context' => $context]);
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                $userfullname    = fullname($USER);
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                $userfirstname   = $USER->firstname;
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            } else {
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                $userlastname    = $USER->lastname;
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                //Sanitise some fields before building the PayPal form
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                $useraddress     = $USER->address;
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                $usercity        = $USER->city;
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                $buttonurl = new moodle_url(empty($CFG->usepaypalsandbox) ?
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                        'https://www.paypal.com/cgi-bin/webscr' :
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                        'https://www.sandbox.paypal.com/cgi-bin/webscr',
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                    [
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                        'cmd' => '_xclick',
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                        'charset' => 'utf-8',
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                        'business' => $this->get_config('paypalbusiness'),
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                        'item_name' => $coursefullname,
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                        'item_number' => $courseshortname,
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                $coursefullname  = format_string($course->fullname, true, array('context'=>$context));
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                        'quantity' => 1,
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                        'on0' => get_string("user"),
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                        'os0' => $userfullname,
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                        'custom' => "{$USER->id}-{$course->id}-{$instance->id}",
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                        'currency_code' => $instance->currency,
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                        'amount' => $cost,
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                        'for_auction' => 'false',
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                        'no_note' => 1,
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                        'no_shipping' => 1,
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                        'notify_url' => "$CFG->wwwroot/enrol/paypal/ipn.php",
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                        'return' => "$CFG->wwwroot/enrol/paypal/return.php?id={$course->id}",
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                        'cancel_return' => $CFG->wwwroot,
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                        'rm' => 2,
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                        'cbt' => get_string("continuetocourse"),
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                $courseshortname = $shortname;
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                        'first_name' => $userfirstname,
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                        'last_name' => $userlastname,
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                        'address' => $useraddress,
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                        'city' => $usercity,
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                        'email' => $USER->email,
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                        'country' => $USER->country,
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 236 
                    ]);
215 
                $userfullname    = fullname($USER);
 237 
                $button = new single_button($buttonurl, get_string("sendpaymentbutton", "enrol_paypal"),
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                $userfirstname   = $USER->firstname;
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                $userlastname    = $USER->lastname;
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                $useraddress     = $USER->address;
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                    'get', single_button::BUTTON_PRIMARY);
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                $usercity        = $USER->city;
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            }
220 
                $instancename    = $this->get_instance_name($instance);
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            $enrolpage = new enrol_page(