polylang / include / links.php

links.php in Polylang 1.7.7, 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
11	/*
12	* constructor
13	*
14	* @since 1.2
15	*
16	* @param object $polylang
17	*/
18	public function __construct(&$polylang) {
19	$this->links_model = &$polylang->links_model;
20	$this->model = &$polylang->model;
21	$this->options = &$polylang->options;
22
23	// adds our domains or subdomains to allowed hosts for safe redirection
24	add_filter('allowed_redirect_hosts', array(&$this, 'allowed_redirect_hosts'));
25
26	// low priority on links filters to come after any other modifications
27	if ($this->options['force_lang']) {
28	add_filter('post_link', array(&$this, 'post_link'), 20, 2);
29	add_filter('_get_page_link', array(&$this, '_get_page_link'), 20, 2);
30	}
31
32	add_filter('post_type_link', array(&$this, 'post_type_link'), 20, 2);
33	add_filter('term_link', array(&$this, 'term_link'), 20, 3);
34
35	if ($this->options['force_lang'] > 1)
36	add_filter('attachment_link', array(&$this, 'attachment_link'), 20, 2);
37
38	if (3 == $this->options['force_lang'])
39	add_filter('preview_post_link', array(&$this, 'preview_post_link'), 20);
40	}
41
42	/*
43	* adds our domains or subdomains to allowed hosts for safe redirection
44	*
45	* @since 1.4.3
46	*
47	* @param array $hosts allowed hosts
48	* @return array
49	*/
50	public function allowed_redirect_hosts($hosts) {
51	return array_unique(array_merge($hosts, $this->links_model->get_hosts()));
52	}
53
54	/*
55	* modifies post & page links
56	*
57	* @since 0.7
58	*
59	* @param string $link post link
60	* @param object $post post object
61	* @return string modified post link
62	*/
63	public function post_link($link, $post) {
64	// /!\ WP does not use pretty permalinks for preview
65	return ($query = parse_url($link, PHP_URL_QUERY)) && false !== strpos($query, 'p=') ? $link : $this->links_model->add_language_to_link($link, $this->model->get_post_language($post->ID));
66	}
67
68
69	/*
70	* modifies page links
71	*
72	* @since 1.7
73	*
74	* @param string $link post link
75	* @param int $post_id post ID
76	* @return string modified post link
77	*/
78	public function _get_page_link($link, $post_id) {
79	// /!\ WP does not use pretty permalinks for preview
80	return ($query = parse_url($link, PHP_URL_QUERY)) && false !== strpos($query, 'page_id=') ? $link : $this->links_model->add_language_to_link($link, $this->model->get_post_language($post_id));
81	}
82
83	/*
84	* modifies attachment links
85	*
86	* @since 1.6.2
87	*
88	* @param string $link attachment link
89	* @param int $post_id attachment link
90	* @return string modified attachment link
91	*/
92	public function attachment_link($link, $post_id) {
93	return $this->links_model->add_language_to_link($link, $this->model->get_post_language($post_id));
94	}
95
96	/*
97	* modifies custom posts links
98	*
99	* @since 1.6
100	*
101	* @param string $link post link
102	* @param object $post post object
103	* @return string modified post link
104	*/
105	public function post_type_link($link, $post) {
106	// /!\ WP does not use pretty permalinks for preview
107	$query = parse_url($link, PHP_URL_QUERY);
108	if ((!$query \|\| false === strpos($query, 'p=')) && $this->model->is_translated_post_type($post->post_type)) {
109	$lang = $this->model->get_post_language($post->ID);
110	$link = $this->options['force_lang'] ? $this->links_model->add_language_to_link($link, $lang) : $link;
111	$link = apply_filters('pll_post_type_link', $link, $lang, $post);
112	}
113
114	return $link;
115	}
116
117	/*
118	* modifies term link
119	*
120	* @since 0.7
121	*
122	* @param string $link term link
123	* @param object $post term object
124	* @param string $tax taxonomy name
125	* @return string modified term link
126	*/
127	public function term_link($link, $term, $tax) {
128	if ($this->model->is_translated_taxonomy($tax)) {
129	$lang = $this->model->get_term_language($term->term_id);
130	$link = $this->options['force_lang'] ? $this->links_model->add_language_to_link($link, $lang) : $link;
131	$link = apply_filters('pll_term_link', $link, $lang, $term);
132	}
133
134	return $link;
135	}
136
137	/*
138	* FIXME: keeps the preview post link on default domain when using multiple domains
139	*
140	* @since 1.6.1
141	*
142	* @param string $url
143	* @return string modified url
144	*/
145	public function preview_post_link($url) {
146	return $this->links_model->remove_language_from_link($url);
147	}
148
149	/*
150	* returns the home url in the requested language
151	*
152	* @since 1.3
153	*
154	* @param object\|string $language
155	* @param bool $is_search optional wether we need the home url for a search form, defaults to false
156	*/
157	public function get_home_url($language, $is_search = false) {
158	$language = is_object($language) ? $language : $this->model->get_language($language);
159	return $is_search ? $language->search_url : $language->home_url;
160	}
161
162	/*
163	* get the link to create a new post translation
164	*
165	* @since 1.5
166	*
167	* @param int $post_id
168	* @param object $language
169	* @return string
170	*/
171	public function get_new_post_translation_link($post_id, $language) {
172	$post_type = get_post_type($post_id);
173
174	if ('attachment' == $post_type) {
175	$args = array(
176	'action' => 'translate_media',
177	'from_media' => $post_id,
178	'new_lang' => $language->slug
179	);
180
181	// add nonce for media as we will directly publish a new attachment from a clic on this link
182	return wp_nonce_url(add_query_arg($args, admin_url('admin.php')), 'translate_media');
183	}
184	else {
185	$args = array(
186	'post_type' => $post_type,
187	'from_post' => $post_id,
188	'new_lang' => $language->slug
189	);
190
191	return add_query_arg($args, admin_url('post-new.php'));
192	}
193	}
194
195	/*
196	* get the link to create a new term translation
197	*
198	* @since 1.5
199	*
200	* @param int $term_id
201	* @param string $taxonomy
202	* @param string $post_type
203	* @param object $language
204	* @return string
205	*/
206	public function get_new_term_translation_link($term_id, $taxonomy, $post_type, $language) {
207	$args = array(
208	'taxonomy' => $taxonomy,
209	'post_type' => $post_type,
210	'from_tag' => $term_id,
211	'new_lang' => $language->slug
212	);
213
214	return add_query_arg($args, admin_url('edit-tags.php'));
215	}
216
217	/*
218	* checks if the current user can read the post
219	*
220	* @since 1.5
221	*
222	* @param int $post_id
223	* @return bool
224	*/
225	public function current_user_can_read($post_id) {
226	$post = get_post($post_id);
227	if (in_array($post->post_status, get_post_stati(array('public' => true))))
228	return true;
229
230	$post_type_object = get_post_type_object($post->post_type);
231	$user = wp_get_current_user();
232	return is_user_logged_in() && (current_user_can($post_type_object->cap->read_private_posts) \|\| $user->ID == $post->post_author);
233	}
234	}
235
236