class-obfuscate-author-slugs.php at 7.5.2 · Admin and Site Enhancements (ASE)

admin-site-enhancements / classes / class-obfuscate-author-slugs.php

class-obfuscate-author-slugs.php

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1	<?php
2
3	namespace ASENHA\Classes;
4
5	/**
6	* Class for Obfuscate Author Slugs module
7	*
8	* @since 6.9.5
9	*/
10	class Obfuscate_Author_Slugs {
11
12	/**
13	* If an author name is queried, decrypt it. Used by pre_get_posts action.
14	*
15	* @link https://plugins.trac.wordpress.org/browser/smart-user-slug-hider/tags/4.0.2/inc/class-smart-user-slug-hider.php
16	* @since 2.1.0
17	*/
18	function alter_author_query( $query ) {
19
20	// Check if it's a query for author data, and that 'author_name' is not empty
21	if ( $query->is_author() && $query->query_vars['author_name'] != '' ) {
22
23	// Check for character(s) representing a hexadecimal digit
24	if ( ctype_xdigit( $query->query_vars['author_name'] ) ) {
25
26	// Get user by the decrypted user ID
27	$user = get_user_by( 'id', $this->decrypt( $query->query_vars['author_name'] ) );
28
29	if ( $user ) {
30
31	$query->set( 'author_name', $user->user_nicename );
32
33	} else {
34
35	// No user found
36	$query->is_404 = true;
37	$query->is_author = false;
38	$query->is_archive = false;
39
40	}
41
42	} else {
43
44	// No hexadecimal digit detected in URL, i.e. someone is trying to access URL with original author slug
45	$query->is_404 = true;
46	$query->is_author = false;
47	$query->is_archive = false;
48
49	}
50
51	}
52
53	return;
54	}
55
56	/**
57	* Replace author slug in author link to encrypted value. Used by author_link filter.
58	*
59	* @link https://plugins.trac.wordpress.org/browser/smart-user-slug-hider/tags/4.0.2/inc/class-smart-user-slug-hider.php
60	* @since 2.1.0
61	*/
62	function alter_author_link( $link, $user_id, $author_slug ) {
63
64	$encrypted_author_slug = $this->encrypt( $user_id );
65
66	return str_replace ( '/' . $author_slug, '/' . $encrypted_author_slug, $link );
67
68	}
69
70	/**
71	* Replace author slug in REST API /users/ endpoint to encrypted value. Used by rest_prepare_user filter.
72	*
73	* @link https://plugins.trac.wordpress.org/browser/smart-user-slug-hider/tags/4.0.2/inc/class-smart-user-slug-hider.php
74	* @since 2.1.0
75	*/
76	function alter_json_users($response, $user, $request) {
77
78	$data = $response->get_data();
79	$data['slug'] = $this->encrypt($data['id']);
80	$response->set_data($data);
81
82	return $response;
83
84	}
85
86	/**
87	* Helper function to return an encrypted user ID, which will then be used to replace the author slug.
88	*
89	* @link https://plugins.trac.wordpress.org/browser/smart-user-slug-hider/trunk/inc/class-smart-user-slug-hider.php
90	* @since 2.1.0
91	*/
92	private function encrypt( $user_id ) {
93
94	// Returns encrypted encrypted author slug from user ID, e.g. encrypt user ID 3 to author slug 4e3062d8c8626a14
95	return bin2hex( openssl_encrypt( base_convert( $user_id, 10, 36 ), 'DES-EDE3', md5( ASENHA_URL ), OPENSSL_RAW_DATA ) );
96	}
97
98
99	/**
100	* Helper function to decrypt an (encrypted) author slug and returns the user ID
101	*
102	* @link https://plugins.trac.wordpress.org/browser/smart-user-slug-hider/trunk/inc/class-smart-user-slug-hider.php
103	* @since 2.1.0
104	*/
105	private function decrypt( $encrypted_author_slug ) {
106
107	// Returns user ID, e.g. decrypts author slug 4e3062d8c8626a14 into user ID 3
108	return base_convert( openssl_decrypt( pack('H*', $encrypted_author_slug), 'DES-EDE3', md5( ASENHA_URL ), OPENSSL_RAW_DATA ), 36, 10 );
109
110	}
111
112	}