webfinger / plugin.php

plugin.php in WebFinger 0.9, at plugin.php

254 lines 7.2 KB

Raw Download Zip

1	<?php
2	/*
3	Plugin Name: Webfinger
4	Plugin URI: http://wordpress.org/extend/plugins/webfinger/
5	Description: Webfinger for WordPress
6	Version: 0.9
7	Author: Matthias Pfefferle
8	Author URI: http://notizblog.org/
9	*/
10
11	add_filter('query_vars', array('WebfingerPlugin', 'queryVars'));
12	add_action('parse_request', array('WebfingerPlugin', 'parseRequest'));
13	add_action('wp_head', array('WebfingerPlugin', 'addHtmlHeader'));
14	add_action('host_meta_xrd', array('WebfingerPlugin', 'addHostMeta'));
15	add_filter('plugin_action_links', array('WebfingerPlugin', 'addSettingsLink'), 10, 2);
16
17	// add profile parts
18	add_action('show_user_profile', array('WebfingerPlugin', 'addUserProfileInfos'));
19	add_action('edit_user_profile', array('WebfingerPlugin', 'addUserProfileInfos'));
20
21	/**
22	* returns a users default webfinger
23	*
24	* @param mixed $id_or_name_or_object
25	* @param boolean $protocol
26	* @return string
27	*/
28	function get_webfinger($id_or_name_or_object = null, $protocol = false) {
29	$user = WebfingerPlugin::getUserByVarious($id_or_name_or_object);
30
31	if ($user) {
32	$webfinger = $user->user_login."@".WebfingerPlugin::getHost();
33	if ($protocol) {
34	$webfinger = "acct:".$webfinger;
35	}
36	return $webfinger;
37	} else {
38	return null;
39	}
40	}
41
42	/**
43	* returns all webfingers
44	*
45	* @param mixed $id_or_name_or_object
46	* @param boolean $protocol
47	*
48	* @return array
49	*/
50	function get_webfingers($id_or_name_or_object = null, $protocol = false) {
51	$user = WebfingerPlugin::getUserByVarious($id_or_name_or_object);
52	$webfingers = array();
53
54	if ($user) {
55	$webfingers[] = ($protocol ? "acct:" : "").get_webfinger($user);
56	$webfingers[] = get_author_posts_url($user->ID, $user->user_nicename);
57	$webfingers = apply_filters('webfingers', $webfingers);
58
59	return $webfingers;
60	} else {
61	return array();
62	}
63	}
64
65	/**
66	* webfinger
67	*
68	* @author Matthias Pfefferle
69	*/
70	class WebfingerPlugin {
71	/**
72	* adds some query vars
73	*
74	* @param array $vars
75	* @return array
76	*/
77	function queryVars($vars) {
78	$vars[] = 'webfinger-uri';
79	//$vars[] = 'webfinger';
80	return $vars;
81	}
82
83	/**
84	* parses the request
85	*/
86	function parseRequest() {
87	global $wp_query, $wp;
88
89	$queryVars = $wp->query_vars;
90
91	if( array_key_exists('webfinger-uri', $queryVars) ) {
92	if (!$user = WebfingerPlugin::getUserByUri($queryVars['webfinger-uri'])) {
93	return null;
94	}
95
96	$url = get_author_posts_url($user->ID, $user->user_nicename);
97
98	header('Content-Type: application/xrd+xml; charset=' . get_option('blog_charset'), true);
99
100	echo "<?xml version='1.0' encoding='".get_option('blog_charset')."'?>\n";
101	echo "<XRD xmlns='http://docs.oasis-open.org/ns/xri/xrd-1.0'";
102	do_action('webfinger_ns');
103	echo ">\n";
104	echo " <Subject>".htmlentities($queryVars['webfinger-uri'])."</Subject>\n";
105	echo " <Alias>".$url."</Alias>\n";
106	echo " <Link rel='http://webfinger.net/rel/profile-page' type='text/html' href='$url' />\n";
107	echo " <Link rel='http://webfinger.net/rel/avatar' href='http://www.gravatar.com/avatar/".md5( $user->user_email ).".jpg' />\n";
108	do_action('webfinger_xrd', $user);
109	// @deprecated please don't use
110	do_action('webfinger_xrd_'.$user->user_login);
111	echo "</XRD>";
112
113	exit;
114	} else {
115	return null;
116	}
117	}
118
119	/**
120	* returns a Userobject
121	*
122	* @param string $uri
123	* @return stdClass
124	*/
125	function getUserByUri($uri) {
126	global $wpdb;
127
128	$uri = urldecode($uri);
129
130	if (preg_match("~^https?://~i", $uri)) {
131	// check if url matches with a
132	// users profile url
133	foreach (get_users_of_blog() as $user) {
134	if (rtrim(str_replace("www.", "", get_author_posts_url($user->ID, $user->user_nicename)), "/") ==
135	rtrim(str_replace("www.", "", $uri), "/")) {
136	return $user;
137	}
138	}
139	} elseif (preg_match('/^([a-zA-Z]+:)?([^@]+)@([a-zA-Z0-9._-]+)$/i', $uri, $array)) {
140	$username = $array[2];
141	$host = $array[3];
142	$email = $username."@".$host;
143
144	if ($host == WebfingerPlugin::getHost()) {
145	$sql = "SELECT * FROM $wpdb->users u INNER JOIN $wpdb->usermeta um ON u.id=um.user_id WHERE u.user_email = '$email' OR
146	(um.meta_key = 'jabber' AND um.meta_value = '$email') OR
147	u.user_login = '$username' LIMIT 1;";
148	$user = $wpdb->get_results($wpdb->prepare($sql));
149	if (!empty($user)) {
150	return $user[0];
151	}
152	}
153	}
154
155	return false;
156	}
157
158	/**
159	* add the host meta information
160	*/
161	function addHostMeta() {
162	echo "<Link rel='lrdd' template='".get_option('siteurl')."/?webfinger-uri={uri}' type='application/xrd+xml' />";
163	}
164
165	/**
166	* adds lrdd-header-link to author profile pages
167	*/
168	function addHtmlHeader() {
169	global $wp_query;
170
171	if (is_author() && !is_feed()) {
172	$author = $wp_query->get_queried_object();
173	$url = get_author_posts_url($author->ID, $author->user_nicename);
174
175	echo "\n";
176	echo "<link rel='lrdd' href='".get_option('siteurl')."/?webfinger-uri=".urlencode($url)."' type='application/xrd+xml' />";
177	echo "\n";
178	}
179	}
180
181	/**
182	* prints webfinger part on the user-site
183	*/
184	function addUserProfileInfos($user) {
185	$webfingers = get_webfingers($user, true);
186	?>
187	<h3 id="webfinger">Webfinger</h3>
188
189	<table class="form-table">
190	<tr>
191	<th scope="row"><?php _e('Your Identifier')?></th>
192	<td>
193	<ul>
194	<?php foreach ($webfingers as $webfinger) { ?>
195	<li><?php echo $webfinger ?></li>
196	<?php } ?>
197	</ul>
198
199	<a href="http://webfinger.org/lookup/<?php echo get_webfinger($user); ?>" target="_blank">Check your webfinger!</a>
200	</td>
201	</tr>
202	</table>
203	<?php
204	}
205
206	/**
207	* returns the blogs host
208	*
209	* @return string
210	*/
211	function getHost() {
212	$url = parse_url(get_bloginfo('url'));
213	return $url['host'];
214	}
215
216	/**
217	* add a settings link next to deactive / edit
218	*
219	* @param array $links
220	* @param string $file
221	* @return array
222	*/
223	function addSettingsLink( $links, $file ) {
224	if( preg_match("/webfinger/i", $file) && function_exists( "admin_url" ) ) {
225	$settings_link = '<a href="' . admin_url( 'profile.php#webfinger' ) . '">' . __('Identifiers') . '</a>';
226	array_unshift( $links, $settings_link );
227	}
228	return $links;
229	}
230
231	/**
232	* Convenience method to get user data by ID, username, object or from current user.
233	*
234	* @param mixed $id_or_name_or_object the username, ID or object. If not provided, the current user will be used.
235	* @return bool\|object False on failure, User DB row object
236	*
237	* @author Will Norris
238	* @see get_userdata_by_various() # DiSo OpenID-Plugin
239	*/
240	function getUserByVarious($id_or_name_or_object = null) {
241	if ( $id_or_name_or_object === null ) {
242	$user = wp_get_current_user();
243	if ($user == null) return false;
244	return $user->data;
245	} else if ( is_object($id_or_name_or_object) ) {
246	return $id_or_name_or_object;
247	} else if ( is_numeric($id_or_name_or_object) ) {
248	return get_userdata($id_or_name_or_object);
249	} else {
250	return get_userdatabylogin($id_or_name_or_object);
251	}
252	}
253	}
254	?>