2 // This file is part of Moodle - http://moodle.org/
4 // Moodle is free software: you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation, either version 3 of the License, or
7 // (at your option) any later version.
9 // Moodle is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License
15 // along with Moodle. If not, see <http://www.gnu.org/licenses/>.
18 * Contains helper class for the payment subsystem.
20 * @package core_payment
21 * @copyright 2019 Shamim Rezaie <shamim@moodle.com>
22 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
25 namespace core_payment;
27 defined('MOODLE_INTERNAL') || die();
30 * Helper class for the payment subsystem.
32 * @copyright 2019 Shamim Rezaie <shamim@moodle.com>
33 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
38 * Returns an accumulated list of supported currencies by all payment gateways.
40 * @return string[] An array of the currency codes in the three-character ISO-4217 format
42 public static function get_supported_currencies(): array {
45 $plugins = \core_plugin_manager::instance()->get_enabled_plugins('pg');
46 foreach ($plugins as $plugin) {
47 $classname = '\pg_' . $plugin . '\gateway';
49 $currencies += $classname::get_supported_currencies();
52 $currencies = array_unique($currencies);
58 * Returns the list of gateways that can process payments in the given currency.
60 * @param string $currency The currency in the three-character ISO-4217 format.
63 public static function get_gateways_for_currency(string $currency): array {
66 $plugins = \core_plugin_manager::instance()->get_enabled_plugins('pg');
67 foreach ($plugins as $plugin) {
68 $classname = '\pg_' . $plugin . '\gateway';
70 $currencies = $classname::get_supported_currencies();
71 if (in_array($currency, $currencies)) {
72 $gateways[] = $plugin;
80 * Requires the JS libraries for the pay button.
82 public static function gateways_modal_requirejs(): void {
90 $PAGE->requires->js_call_amd('core_payment/gateways_modal', 'registerEventListeners', ['#gateways-modal-trigger']);
95 * Returns the attributes to place on a pay button.
97 * @param float $amount Amount of payment
98 * @param string $currency Currency of payment
99 * @param string $component Name of the component that the componentid belongs to
100 * @param int $componentid An internal identifier that is used by the component
101 * @param string $description Description of the payment
104 public static function gateways_modal_link_params(float $amount, string $currency, string $component, int $componentid,
105 string $description): array {
107 'id' => 'gateways-modal-trigger',
109 'data-amount' => $amount,
110 'data-currency' => $currency,
111 'data-component' => $component,
112 'data-componentid' => $componentid,
113 'data-description' => $description,
118 * Asks the cost from the related component.
120 * @param string $component Name of the component that the componentid belongs to
121 * @param int $componentid An internal identifier that is used by the component
122 * @return array['amount' => float, 'currency' => string]
123 * @throws \moodle_exception
125 public static function get_cost(string $component, int $componentid): array {
126 $cost = component_class_callback("$component\\payment\\provider", 'get_cost', [$componentid]);
128 if ($cost === null) {
129 throw new \moodle_exception('callbacknotimplemented', 'core_payment', '', $component);
136 * Delivers what the user paid for.
138 * @param string $component Name of the component that the componentid belongs to
139 * @param int $componentid An internal identifier that is used by the component
140 * @return bool Whether successful or not
141 * @throws \moodle_exception
143 public static function deliver_order(string $component, int $componentid): bool {
144 $result = component_class_callback("$component\\payment\\provider", 'deliver_order', [$componentid]);
146 if ($result === null) {
147 throw new \moodle_exception('callbacknotimplemented', 'core_payment', '', $component);