photonic / Platforms / Authenticator.php

Authenticator.php in Photonic Gallery & Lightbox for Flickr, SmugMug & Others 3.33, at Platforms/Authenticator.php

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1	<?php
2
3	namespace Photonic_Plugin\Platforms;
4
5	trait Authenticator {
6	abstract public function get_access_token($token);
7
8	public function oauth_signature_method(): string {
9	return 'HMAC-SHA1';
10	}
11
12	/**
13	* Encodes the URL as per RFC3986 specs. This replaces some strings in addition to the ones done by a rawurlencode.
14	* This has been adapted from the OAuth for PHP project.
15	*
16	* @static
17	* @param $input
18	* @return array\|mixed\|string
19	*/
20	public static function urlencode_rfc3986($input) {
21	if (is_array($input)) {
22	return array_map(['Photonic_Plugin\Platforms\Authenticator', 'urlencode_rfc3986'], $input);
23	}
24	elseif (is_scalar($input)) {
25	return str_replace(
26	'+',
27	' ',
28	str_replace('%7E', '~', rawurlencode($input))
29	);
30	}
31	else {
32	return '';
33	}
34	}
35
36	/**
37	* Takes an array of parameters, then parses it and generates a query string. Prior to generating the query string the parameters are sorted in their natural order.
38	* Without sorting the signatures between this application and the provider might differ.
39	*
40	* @static
41	* @param $params
42	* @return string
43	*/
44	public static function build_query($params): string {
45	if (!$params) {
46	return '';
47	}
48	$keys = array_map(['Photonic_Plugin\Platforms\Authenticator', 'urlencode_rfc3986'], array_keys($params));
49	$values = array_map(['Photonic_Plugin\Platforms\Authenticator', 'urlencode_rfc3986'], array_values($params));
50	$params = array_combine($keys, $values);
51
52	// Sort by keys (natsort)
53	uksort($params, 'strnatcmp');
54	$pairs = [];
55	foreach ($params as $key => $value) {
56	if (is_array($value)) {
57	natsort($value);
58	foreach ($value as $v2) {
59	$pairs[] = ('' === $v2) ? "$key=0" : "$key=$v2";
60	}
61	}
62	else {
63	$pairs[] = ('' === $value) ? "$key=0" : "$key=$value";
64	}
65	}
66
67	$string = implode('&', $pairs);
68	return $string;
69	}
70
71	/**
72	* Takes a token response from a request token call, then puts it in an appropriate array.
73	*
74	* @param $response
75	* @return array
76	*/
77	abstract public function parse_token($response): array;
78
79	/**
80	* Saves the token in the authentication options. Used only by Flickr and SmugMug; invoked via the Authentication screen.
81	* Transients don't need to be saved as Flickr and SmugMug don't need them.
82	*
83	* @param $token
84	*/
85	public function save_token($token) {
86	if (current_user_can('edit_theme_options') && check_ajax_referer($this->provider . '-request-token-' . $this->api_secret)) {
87	$photonic_authentication = get_option('photonic_authentication');
88	if (!isset($photonic_authentication)) {
89	$photonic_authentication = [];
90	}
91	$photonic_authentication[$this->provider] = $token;
92	update_option('photonic_authentication', $photonic_authentication);
93	}
94	}
95
96	/**
97	* Fetches a token from authentication options
98	*
99	* @return array\|null
100	*/
101	public function get_cached_token() {
102	$transient_token = get_transient('photonic_' . $this->provider . '_token');
103	$photonic_authentication = get_option('photonic_authentication');
104	if (false !== $transient_token) {
105	return $transient_token;
106	}
107
108	if (!empty($photonic_authentication) && isset($photonic_authentication[$this->provider])) {
109	$transient_expiry = $photonic_authentication[$this->provider]['oauth_token_created'] + $photonic_authentication[$this->provider]['oauth_token_expires'] - time();
110	set_transient('photonic_' . $this->provider . '_token', $photonic_authentication[$this->provider], $transient_expiry);
111	return $photonic_authentication[$this->provider];
112	}
113	return null;
114	}
115	}
116