polylang / include / links.php

links.php in Polylang 1.6.2, at include/links.php

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1	<?php
2
3	/*
4	* manages links filters needed on both frontend and admin
5	*
6	* @since 1.2
7	*/
8	class PLL_Links {
9	public $links_model, $model, $options;
10	protected $_links;
11
12	/*
13	* constructor
14	*
15	* @since 1.2
16	*
17	* @param object $polylang
18	*/
19	public function __construct(&$polylang) {
20	$this->links_model = &$polylang->links_model;
21	$this->model = &$polylang->model;
22	$this->options = &$polylang->options;
23
24	// adds our domains or subdomains to allowed hosts for safe redirection
25	add_filter('allowed_redirect_hosts', array(&$this, 'allowed_redirect_hosts'));
26
27	// low priority on links filters to come after any other modifications
28	if ($this->options['force_lang']) {
29	add_filter('post_link', array(&$this, 'post_link'), 20, 2);
30	add_filter('_get_page_link', array(&$this, 'post_link'), 20, 2);
31	}
32
33	if ($this->links_model->using_permalinks) {
34	add_filter('post_type_link', array(&$this, 'post_type_link'), 20, 2);
35	add_filter('term_link', array(&$this, 'term_link'), 20, 3);
36	}
37
38	if ($this->options['force_lang'] > 1)
39	add_filter('attachment_link', array(&$this, 'attachment_link'), 20, 2);
40
41	if (3 == $this->options['force_lang'])
42	add_filter('preview_post_link', array(&$this, 'preview_post_link'), 20);
43	}
44
45	/*
46	* adds our domains or subdomains to allowed hosts for safe redirection
47	*
48	* @since 1.4.3
49	*
50	* @param array $hosts allowed hosts
51	* @return array
52	*/
53	public function allowed_redirect_hosts($hosts) {
54	return array_unique(array_merge($hosts, $this->links_model->get_hosts()));
55	}
56
57	/*
58	* modifies post & page links
59	*
60	* @since 0.7
61	*
62	* @param string $link post link
63	* @param object\|int $post post object or post ID
64	* @return string modified post link
65	*/
66	public function post_link($link, $post) {
67	if (isset($this->_links[$link]))
68	return $this->_links[$link];
69
70	if ('_get_page_link' == current_filter()) // this filter uses the ID instead of the post object
71	$post = get_post($post);
72
73	// /!\ when post_status is not "publish", WP does not use pretty permalinks
74	return $this->_links[$link] = $post->post_status != 'publish' ? $link : $this->links_model->add_language_to_link($link, $this->model->get_post_language($post->ID));
75	}
76
77	/*
78	* modifies attachment links
79	*
80	* @since 1.6.2
81	*
82	* @param string $link attachment link
83	* @param int $post_id attachment link
84	* @return string modified attachment link
85	*/
86	public function attachment_link($link, $post_id) {
87	if (isset($this->_links[$link]))
88	return $this->_links[$link];
89
90	return $this->_links[$link] = $this->links_model->add_language_to_link($link, $this->model->get_post_language($post_id));
91	}
92
93	/*
94	* modifies custom posts links
95	*
96	* @since 1.6
97	*
98	* @param string $link post link
99	* @param object\|int $post post object or post ID
100	* @return string modified post link
101	*/
102	public function post_type_link($link, $post) {
103	if (isset($this->_links[$link]))
104	return $this->_links[$link];
105
106	// /!\ when post_status is not "publish", WP does not use pretty permalinks
107	if ('publish' == $post->post_status && $this->model->is_translated_post_type($post->post_type)) {
108	$lang = $this->model->get_post_language($post->ID);
109
110	if ($this->options['force_lang'])
111	$link = $this->links_model->add_language_to_link($link, $lang);
112
113	$link = apply_filters('pll_post_type_link', $link, $lang, $post);
114	}
115
116	return $this->_links[$link] = $link;
117	}
118
119	/*
120	* modifies term link
121	*
122	* @since 0.7
123	*
124	* @param string $link term link
125	* @param object $post term object
126	* @param string $tax taxonomy name
127	* @return string modified term link
128	*/
129	public function term_link($link, $term, $tax) {
130	if (isset($this->_links[$link]))
131	return $this->_links[$link];
132
133	if ($this->model->is_translated_taxonomy($tax)) {
134	$lang = $this->model->get_term_language($term->term_id);
135
136	if ($this->options['force_lang'])
137	$link = $this->links_model->add_language_to_link($link, $lang);
138
139	$link = apply_filters('pll_term_link', $link, $lang, $term);
140	}
141
142	return $this->_links[$link] = $link;
143	}
144
145	/*
146	* FIXME: keeps the preview post link on default domain when using multiple domains
147	*
148	* @since 1.6.1
149	*
150	* @param string $url
151	* @return string modified url
152	*/
153	public function preview_post_link($url) {
154	return $this->links_model->remove_language_from_link($url);
155	}
156
157	/*
158	* returns the home url in the requested language
159	*
160	* @since 1.3
161	*
162	* @param object\|string $language
163	* @param bool $is_search optional wether we need the home url for a search form, defaults to false
164	*/
165	public function get_home_url($language, $is_search = false) {
166	$language = is_object($language) ? $language : $this->model->get_language($language);
167	return $is_search ? $language->search_url : $language->home_url;
168	}
169
170	/*
171	* get the link to create a new post translation
172	*
173	* @since 1.5
174	*
175	* @param int $post_id
176	* @param object $language
177	* @return string
178	*/
179	public function get_new_post_translation_link($post_id, $language) {
180	$post_type = get_post_type($post_id);
181
182	if ('attachment' == $post_type) {
183	$args = array(
184	'action' => 'translate_media',
185	'from_media' => $post_id,
186	'new_lang' => $language->slug
187	);
188
189	// add nonce for media as we will directly publish a new attachment from a clic on this link
190	return wp_nonce_url(add_query_arg($args, admin_url('admin.php')), 'translate_media');
191	}
192	else {
193	$args = array(
194	'post_type' => $post_type,
195	'from_post' => $post_id,
196	'new_lang' => $language->slug
197	);
198
199	return add_query_arg($args, admin_url('post-new.php'));
200	}
201	}
202
203	/*
204	* get the link to create a new term translation
205	*
206	* @since 1.5
207	*
208	* @param int $term_id
209	* @param string $taxonomy
210	* @param string $post_type
211	* @param object $language
212	* @return string
213	*/
214	public function get_new_term_translation_link($term_id, $taxonomy, $post_type, $language) {
215	$args = array(
216	'taxonomy' => $taxonomy,
217	'post_type' => $post_type,
218	'from_tag' => $term_id,
219	'new_lang' => $language->slug
220	);
221
222	return add_query_arg($args, admin_url('edit-tags.php'));
223	}
224
225	/*
226	* checks if the current user can read the post
227	*
228	* @since 1.5
229	*
230	* @param int $post_id
231	* @return bool
232	*/
233	public function current_user_can_read($post_id) {
234	$post = get_post($post_id);
235	if (in_array($post->post_status, get_post_stati(array('public' => true))))
236	return true;
237
238	$post_type_object = get_post_type_object($post->post_type);
239	$user = wp_get_current_user();
240	return is_user_logged_in() && (current_user_can($post_type_object->cap->read_private_posts) \|\| $user->ID == $post->post_author);
241	}
242	}
243
244