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checkout.php
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checkout.php
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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/>.
/**
* Listens for Instant Payment Notification from Braintree
*
* This script waits for Payment notification from Braintree,
* then double checks that data by sending it back to Braintree.
* If Braintree verifies this then it sets up the enrolment for that
* user.
*
* @package enrol_braintree
* @copyright 2016 Dualcube, Arkaprava Midya, Parthajeet Chakraborty, Adrita Sharma
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
// Disable moodle specific debug messages and any errors in output,
// comment out when debugging or better look into error log!
require_once('braintree/lib/Braintree.php');
require("../../config.php");
require_once("lib.php");
require_once($CFG->libdir.'/eventslib.php');
require_once($CFG->libdir.'/enrollib.php');
require_once($CFG->libdir . '/filelib.php');
require_login();
// Braintree does not like when we return error messages here.
// the custom handler just logs exceptions and stops.
// set_exception_handler('enrol_braintree_charhge_exception_handler').;
// Keep out casual intruders.
if (empty($_POST) or !empty($_GET)) {
print_error("Sorry, you can not use the script that way.");
}
$post = (array) data_submitted();
$data = new stdClass();
foreach ($post as $key => $value) {
$data->$key = $value;
}
$custom = explode('-', $data->custom);
$data->userid = (int)$custom[0];
$data->courseid = (int)$custom[1];
$data->instanceid = (int)$custom[2];
$data->payment_gross = $data->amount;
$data->payment_currency = $data->currency_code;
$data->timeupdated = time();
// Get the user and course records.
if (! $user = $DB->get_record("user", array("id" => $data->userid))) {
message_braintree_error_to_admin("Not a valid user id", $data);
redirect($CFG->wwwroot);
}
if (! $course = $DB->get_record("course", array("id" => $data->courseid))) {
message_braintree_error_to_admin("Not a valid course id", $data);
redirect($CFG->wwwroot);
}
if (! $context = context_course::instance($course->id, IGNORE_MISSING)) {
message_braintree_error_to_admin("Not a valid context id", $data);
redirect($CFG->wwwroot);
}
$PAGE->set_context($context);
if (! $plugininstance = $DB->get_record("enrol", array("id" => $data->instanceid, "status" => 0))) {
message_braintree_error_to_admin("Not a valid instance id", $data);
redirect($CFG->wwwroot);
}
// If currency is incorrectly set then someone maybe trying to cheat the system.
if ($data->courseid != $plugininstance->courseid) {
message_braintree_error_to_admin("Course Id does not match to the course settings, received: ".$data->courseid, $data);
redirect($CFG->wwwroot);
}
$plugin = enrol_get_plugin('braintree');
// Check that amount paid is the correct amount.
if ( (float) $plugininstance->cost <= 0 ) {
$cost = (float) $plugin->get_config('cost');
} else {
$cost = (float) $plugininstance->cost;
}
$destination = "$CFG->wwwroot/course/view.php?id=$course->id";
// Use the same rounding of floats as on the enrol form.
$cost = format_float($cost, 2, false);
Braintree_Configuration::environment($plugin->get_config('environment'));
Braintree_Configuration::merchantId($plugin->get_config('merchantId'));
Braintree_Configuration::publicKey($plugin->get_config('publickey'));
Braintree_Configuration::privateKey($plugin->get_config('privatekey'));
$nonce = $post ['payment_method_nonce'];
if ($customer = $DB->get_record('enrol_braintree_customer', array('iduser' => $USER->id))) {
$customerid = $customer->idcustomer;
$result = Braintree_PaymentMethod::create([
'customerId' => $customerid,
'paymentMethodNonce' => $nonce,
'options' => [
'failOnDuplicatePaymentMethod' => true,
'makeDefault' => true
]
]);
} else {
$result = Braintree_Customer::create([
'firstName' => $USER->firstname,
'lastName' => $USER->lastname,
'email' => $USER->email,
'paymentMethodNonce' => $nonce
]);
if (!$result->success) {
foreach ($result->errors->deepAll() as $error) {
redirect($destination);
}
}
$customerid = $result->customer->id;
$record = new stdClass();
$record->iduser = $USER->id;
$record->idcustomer = $customerid;
$record->create_date = time();
$DB->insert_record('enrol_braintree_customer', $record);
}
$result2 = Braintree_Transaction::sale([
'customerId' => $customerid,
'amount' => $cost,
'options' => [ 'submitForSettlement' => true ]
]);
if ($result2->transaction) {
$data->merchant_id = $result2->transaction->merchantAccountId;
$data->txn_id = isset($result2->transaction->id) ? $result2->transaction->id : '';
$data->amount = $result2->transaction->amount;
$data->currency = $result2->transaction->currencyIsoCode;
$data->tax = $result2->transaction->taxAmount;
$data->payment_type = $result2->transaction->type;
$data->memo = $result2->transaction->orderId;
$data->payment_status = $result2->transaction->status;
$data->pending_reason = $result2->transaction->gatewayRejectionReason;
$data->reason_code = $result2->transaction->processorResponseCode;
}
if ($result2->success) {
// Send the file, this line will be reached if no error was thrown above.
// ALL CLEAR !
$DB->insert_record("enrol_braintree", $data);
if ($plugininstance->enrolperiod) {
$timestart = time();
$timeend = $timestart + $plugininstance->enrolperiod;
} else {
$timestart = 0;
$timeend = 0;
}
// Enrol user.
$plugin->enrol_user($plugininstance, $USER->id, $plugininstance->roleid, $timestart, $timeend);
// Pass $view=true to filter hidden caps if the user cannot see them.
if ($users = get_users_by_capability($context, 'moodle/course:update', 'u.*', 'u.id ASC',
'', '', '', '', false, true)) {
$users = sort_by_roleassignment_authority($users, $context);
$teacher = array_shift($users);
} else {
$teacher = false;
}
$mailstudents = $plugin->get_config('mailstudents');
$mailteachers = $plugin->get_config('mailteachers');
$mailadmins = $plugin->get_config('mailadmins');
$shortname = format_string($course->shortname, true, array('context' => $context));
$a = new stdClass();
if (!empty($mailstudents)) {
$a = new stdClass();
$a->coursename = format_string($course->fullname, true, array('context' => $context));
$a->profileurl = "$CFG->wwwroot/user/view.php?id=$user->id";
$eventdata = new stdClass();
$eventdata->modulename = 'moodle';
$eventdata->component = 'enrol_braintree';
$eventdata->name = 'braintree_enrolment';
$eventdata->userfrom = empty($teacher) ? core_user::get_support_user() : $teacher;
$eventdata->userto = $user;
$eventdata->subject = get_string("enrolmentnew", 'enrol', $shortname);
$eventdata->fullmessage = get_string('welcometocoursetext', '', $a);
$eventdata->fullmessageformat = FORMAT_PLAIN;
$eventdata->fullmessagehtml = '';
$eventdata->smallmessage = '';
message_send($eventdata);
}
if (!empty($mailteachers) && !empty($teacher)) {
$a->course = format_string($course->fullname, true, array('context' => $context));
$a->user = fullname($user);
$eventdata = new stdClass();
$eventdata->modulename = 'moodle';
$eventdata->component = 'enrol_braintree';
$eventdata->name = 'braintree_enrolment';
$eventdata->userfrom = $user;
$eventdata->userto = $teacher;
$eventdata->subject = get_string("enrolmentnew", 'enrol', $shortname);
$eventdata->fullmessage = get_string('enrolmentnewuser', 'enrol', $a);
$eventdata->fullmessageformat = FORMAT_PLAIN;
$eventdata->fullmessagehtml = '';
$eventdata->smallmessage = '';
message_send($eventdata);
}
if (!empty($mailadmins)) {
$a->course = format_string($course->fullname, true, array('context' => $context));
$a->user = fullname($user);
$admins = get_admins();
foreach ($admins as $admin) {
$eventdata = new stdClass();
$eventdata->modulename = 'moodle';
$eventdata->component = 'enrol_braintree';
$eventdata->name = 'braintree_enrolment';
$eventdata->userfrom = $user;
$eventdata->userto = $admin;
$eventdata->subject = get_string("enrolmentnew", 'enrol', $shortname);
$eventdata->fullmessage = get_string('enrolmentnewuser', 'enrol', $a);
$eventdata->fullmessageformat = FORMAT_PLAIN;
$eventdata->fullmessagehtml = '';
$eventdata->smallmessage = '';
message_send($eventdata);
}
}
if (!empty($SESSION->wantsurl)) {
$destination = $SESSION->wantsurl;
unset($SESSION->wantsurl);
} else {
$destination = "$CFG->wwwroot/course/view.php?id=$course->id";
}
$fullname = format_string($course->fullname, true, array('context' => $context));
if (is_enrolled($context, null, '', true)) { // TODO: use real braintree check.
redirect($destination, get_string('paymentthanks', '', $fullname));
} else { // Somehow they aren't enrolled yet!
$PAGE->set_url($destination);
echo $OUTPUT->header();
$a = new stdClass();
$a->teacher = get_string('defaultcourseteacher');
$a->fullname = $fullname;
notice(get_string('paymentsorry', '', $a), $destination);
}
} else if ($result2->transaction) {
$DB->insert_record("enrol_braintree", $data);
if (!empty($SESSION->wantsurl)) {
$destination = $SESSION->wantsurl;
unset($SESSION->wantsurl);
} else {
$destination = "$CFG->wwwroot/course/view.php?id=$course->id";
}
$fullname = format_string($course->fullname, true, array('context' => $context));
if (is_enrolled($context, null, '', true)) { // TODO: use real braintree check.
redirect($destination, get_string('paymentthanks', '', $fullname));
} else { // Somehow they aren't enrolled yet!
$PAGE->set_url($destination);
echo $OUTPUT->header();
$a = new stdClass();
$a->teacher = get_string('defaultcourseteacher');
$a->fullname = $fullname;
notice(get_string('paymentsorry', '', $a), $destination);
}
} else {
echo("Validation errors: \n");
echo($result2->errors->deepAll());
}
// HELPER FUNCTIONS.
/**
* Send payment error message to the admin.
*
* @param string $subject
* @param stdClass $data
*/
function message_braintree_error_to_admin($subject, $data) {
echo $subject;
$admin = get_admin();
$site = get_site();
$message = "$site->fullname: Transaction failed.\n\n$subject\n\n";
foreach ($data as $key => $value) {
$message .= s($key) ." => ". s($value)."\n";
}
$eventdata = new stdClass();
$eventdata->modulename = 'moodle';
$eventdata->component = 'enrol_braintree';
$eventdata->name = 'braintree_enrolment';
$eventdata->userfrom = $admin;
$eventdata->userto = $admin;
$eventdata->subject = "BRAINTREE ERROR: ".$subject;
$eventdata->fullmessage = $message;
$eventdata->fullmessageformat = FORMAT_PLAIN;
$eventdata->fullmessagehtml = '';
$eventdata->smallmessage = '';
message_send($eventdata);
}