MDL-69166 core_payment: show cost on the modal
[moodle.git] / payment / classes / helper.php
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1<?php
2// This file is part of Moodle - http://moodle.org/
3//
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.
8//
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.
13//
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/>.
16
17/**
18 * Contains helper class for the payment subsystem.
19 *
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
23 */
24
25namespace core_payment;
26
27defined('MOODLE_INTERNAL') || die();
28
29/**
30 * Helper class for the payment subsystem.
31 *
32 * @copyright 2019 Shamim Rezaie <shamim@moodle.com>
33 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
34 */
35class helper {
36
37 /**
38 * Returns an accumulated list of supported currencies by all payment gateways.
39 *
40 * @return string[] An array of the currency codes in the three-character ISO-4217 format
41 */
42 public static function get_supported_currencies(): array {
43 $currencies = [];
44
45 $plugins = \core_plugin_manager::instance()->get_enabled_plugins('pg');
46 foreach ($plugins as $plugin) {
47 $classname = '\pg_' . $plugin . '\gateway';
48
49 $currencies += $classname::get_supported_currencies();
50 }
51
52 $currencies = array_unique($currencies);
53
54 return $currencies;
55 }
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56
57 /**
58 * Returns the list of gateways that can process payments in the given currency.
59 *
60 * @param string $currency The currency in the three-character ISO-4217 format.
61 * @return string[]
62 */
63 public static function get_gateways_for_currency(string $currency): array {
64 $gateways = [];
65
66 $plugins = \core_plugin_manager::instance()->get_enabled_plugins('pg');
67 foreach ($plugins as $plugin) {
68 $classname = '\pg_' . $plugin . '\gateway';
69
70 $currencies = $classname::get_supported_currencies();
71 if (in_array($currency, $currencies)) {
72 $gateways[] = $plugin;
73 }
74 }
75
76 return $gateways;
77 }
c2321a26 78
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79 /**
80 * Returns the attributes to place on a pay button.
81 *
82 * @param float $amount Amount of payment
83 * @param string $currency Currency of payment
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84 * @param string $component Name of the component that the componentid belongs to
85 * @param int $componentid An internal identifier that is used by the component
86 * @param string $description Description of the payment
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87 * @return array
88 */
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89 public static function gateways_modal_link_params(float $amount, string $currency, string $component, int $componentid,
90 string $description): array {
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91 return [
92 'id' => 'gateways-modal-trigger',
93 'role' => 'button',
94 'data-amount' => $amount,
95 'data-currency' => $currency,
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96 'data-component' => $component,
97 'data-componentid' => $componentid,
ab6ca275 98 'data-description' => $description,
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99 ];
100 }
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101
102 /**
103 * Asks the cost from the related component.
104 *
105 * @param string $component Name of the component that the componentid belongs to
106 * @param int $componentid An internal identifier that is used by the component
107 * @return array['amount' => float, 'currency' => string]
108 * @throws \moodle_exception
109 */
110 public static function get_cost(string $component, int $componentid): array {
111 $cost = component_class_callback("$component\\payment\\provider", 'get_cost', [$componentid]);
112
113 if ($cost === null) {
114 throw new \moodle_exception('callbacknotimplemented', 'core_payment', '', $component);
115 }
116
117 return $cost;
118 }
119
120 /**
121 * Delivers what the user paid for.
122 *
123 * @param string $component Name of the component that the componentid belongs to
124 * @param int $componentid An internal identifier that is used by the component
125 * @return bool Whether successful or not
126 * @throws \moodle_exception
127 */
128 public static function deliver_order(string $component, int $componentid): bool {
129 $result = component_class_callback("$component\\payment\\provider", 'deliver_order', [$componentid]);
130
131 if ($result === null) {
132 throw new \moodle_exception('callbacknotimplemented', 'core_payment', '', $component);
133 }
134
135 return $result;
136 }
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137
138 /**
139 * Stores essential information about the payment and returns the "id" field of the payment record in DB.
140 * Each payment gateway may then store the additional information their way.
141 *
142 * @param string $component Name of the component that the componentid belongs to
143 * @param int $componentid An internal identifier that is used by the component
144 * @param int $userid Id of the user who is paying
145 * @param float $amount Amount of payment
146 * @param string $currency Currency of payment
147 * @param string $gateway The gateway that is used for the payment
148 * @return int
149 */
150 public static function save_payment(string $component, int $componentid, int $userid, float $amount, string $currency,
151 string $gateway): int {
152 global $DB;
153
154 $record = new \stdClass();
155 $record->component = $component;
156 $record->componentid = $componentid;
157 $record->userid = $userid;
158 $record->amount = $amount;
159 $record->currency = $currency;
160 $record->gateway = $gateway;
161 $record->timecreated = $record->timemodified = time();
162
163 $id = $DB->insert_record('payments', $record);
164
165 return $id;
166 }
4865d2a0 167}