shortcode-variables / includes / license.php

license.php in Snippet Shortcodes 3.5.2, at includes/license.php

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1	<?php
2
3	defined('ABSPATH') or die('Jog on!');
4
5	/**
6	* Premium license?
7	*
8	* @return bool
9	*/
10	function sh_cd_license_is_premium() {
11	return (bool) get_option( 'sh-cd-license-valid', false );
12	}
13
14	/**
15	* Return a link to the upgrade page
16	*
17	* @return string
18	*/
19	function sh_cd_license_upgrade_link() {
20
21	$link = admin_url('admin.php?page=sh-cd-shortcode-variables-license');
22
23	return esc_url( $link );
24	}
25
26	/**
27	* Check an existing license's hash is still valid
28	**/
29	function sh_cd_license_validate( $license ) {
30
31	if ( true === empty( $license ) ) {
32	return __( 'License missing', SH_CD_SLUG );
33	}
34
35	// Decode license
36	$license = sh_cd_license_decode( $license );
37
38	if ( true === empty( $license ) ) {
39	return __( 'Could not decode / verify license', SH_CD_SLUG );
40	}
41
42	// Does site hash in license meet this site's actual hash?
43	if ( true === empty( $license['site-hash'] ) ) {
44	return __( 'Invalid license hash', SH_CD_SLUG );
45	}
46
47	// Match this site hash?
48	if ( sh_cd_generate_site_hash() !== $license['site-hash']) {
49	return __( 'This license doesn\'t appear to be for this site (no match on site hash).', SH_CD_SLUG );
50	}
51
52	// Valid date?
53	$today_time = strtotime( date( 'Y-m-d' ) );
54	$expire_time = strtotime( $license['expiry-date'] );
55
56	if ( $expire_time < $today_time ) {
57	return __( 'This license has expired.', SH_CD_SLUG );
58	}
59
60	return true;
61	}
62
63	/**
64	* Validate and decode a license
65	**/
66	function sh_cd_license_decode( $license ) {
67
68	if( true === empty( $license ) ) {
69	return NULL;
70	}
71
72	// Base64 and JSON decode
73	$license = base64_decode( $license );
74
75	if( false === $license ) {
76	return NULL;
77	}
78
79	$license = json_decode( $license, true );
80
81	if( true === empty( $license ) ) {
82	return NULL;
83	}
84
85	// Validate hash!
86	$verify_hash = md5( 'yeken.uk' . $license['type'] . $license['expiry-days'] . $license['site-hash'] . $license['expiry-date'] );
87
88	return ( $license['hash'] == $verify_hash && false === empty( $license ) ) ? $license : NULL;
89	}
90
91
92	/**
93	* Validate and apply a license
94	**/
95	function sh_cd_license_apply( $license ) {
96
97	// Validate license
98	$license_result = sh_cd_license_validate($license);
99
100	if( true === $license_result ) {
101
102	update_option( 'sh-cd-license', $license );
103	update_option( 'sh-cd-license-valid', true );
104
105	return true;
106	}
107
108	return false;
109	}
110
111	/**
112	* Remove a license
113	**/
114	function sh_cd_license_remove() {
115
116	delete_option( 'sh-cd-license' );
117	delete_option( 'sh-cd-license-valid' );
118	}
119
120	/**
121	* Generate a site hash to identify this site.
122	**/
123	function sh_cd_generate_site_hash() {
124
125	$site_hash = get_option( 'sh-cd-hash' );
126
127	// Generate a basic site key from URL and plugin slug
128	if( false == $site_hash ) {
129
130	$site_hash = md5( 'yeken-sh-cd-' . site_url() );
131	$site_hash = substr( $site_hash, 0, 6 );
132
133	update_option( 'sh-cd-hash', $site_hash );
134
135	}
136	return $site_hash;
137	}
138
139	/**
140	* Fetch license
141	*
142	* @return mixed
143	*/
144	function sh_cd_license() {
145	return get_option( 'sh-cd-license', '' );
146	}
147
148	/**
149	* Fetch license price
150	*
151	* @return float\|null
152	*/
153	function sh_cd_license_price() {
154
155	$price = yeken_license_price( 'sv-premium' );
156
157	return ( false === empty( $price ) ) ? $price : SH_CD_PREMIUM_PRICE;
158	}
159
160	if ( false === function_exists( 'yeken_license_api_fetch_licenses' ) ) {
161
162	/**
163	* Call out to YeKen API for license prices
164	*/
165	function yeken_license_api_fetch_licenses() {
166
167	if ( $cache = get_transient( 'yeken_api_prices' ) ) {
168	return $cache;
169	}
170
171	$response = wp_remote_get( 'https://shop.yeken.uk/wp-json/yeken/v1/license-prices/' );
172
173	// All ok?
174	if ( 200 === wp_remote_retrieve_response_code( $response ) ) {
175
176	$body = wp_remote_retrieve_body( $response );
177
178	if ( false === empty( $body ) ) {
179
180	$body = json_decode( $body, true );
181	set_transient( 'yeken_api_prices', $body, 216000 ); // Cache for 6 hours
182
183	return $body;
184	}
185	}
186
187	return NULL;
188	}
189
190	/**
191	* Fetch a certain product price
192	* @param $sku
193	* @param string $type
194	*/
195	function yeken_license_price( $sku, $type = 'yearly' ) {
196
197	$licenses = yeken_license_api_fetch_licenses();
198
199	return ( false === empty( $licenses[ $sku ][ $type ] ) ) ? $licenses[ $sku ][ $type ] : NULL;
200	}
201
202	/**
203	* Render out license prices
204	*
205	* @param $args
206	* @return mixed\|string
207	*/
208	function yeken_license_shortcode( $args ) {
209
210	$args = wp_parse_args( $args, [ 'sku' => 'sv-premium', 'type' => 'yearly', 'prefix' => '£' ] );
211
212	$price = yeken_license_price( $args[ 'sku' ], $args[ 'type' ] );
213
214	if ( false === empty( $price ) ) {
215	return sprintf( '%s%d', esc_html( $args[ 'prefix' ] ), $price );
216	}
217
218	return '';
219	}
220	add_shortcode( 'yeken-license-price', 'yeken_license_shortcode' );
221
222	}
223