polylang / include / links.php

links.php in Polylang 1.7.3, 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	// /!\ when post_status is not "publish", WP does not use pretty permalinks
65	return $post->post_status != 'publish' ? $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	$post = get_post($post_id);
80
81	// /!\ when post_status is not "publish", WP does not use pretty permalinks
82	return $post->post_status != 'publish' ? $link : $this->links_model->add_language_to_link($link, $this->model->get_post_language($post->ID));
83	}
84
85	/*
86	* modifies attachment links
87	*
88	* @since 1.6.2
89	*
90	* @param string $link attachment link
91	* @param int $post_id attachment link
92	* @return string modified attachment link
93	*/
94	public function attachment_link($link, $post_id) {
95	return $this->links_model->add_language_to_link($link, $this->model->get_post_language($post_id));
96	}
97
98	/*
99	* modifies custom posts links
100	*
101	* @since 1.6
102	*
103	* @param string $link post link
104	* @param object $post post object
105	* @return string modified post link
106	*/
107	public function post_type_link($link, $post) {
108	// /!\ when post_status is not "publish", WP does not use pretty permalinks
109	if ('publish' == $post->post_status && $this->model->is_translated_post_type($post->post_type)) {
110	$lang = $this->model->get_post_language($post->ID);
111	$link = $this->options['force_lang'] ? $this->links_model->add_language_to_link($link, $lang) : $link;
112	$link = apply_filters('pll_post_type_link', $link, $lang, $post);
113	}
114
115	return $link;
116	}
117
118	/*
119	* modifies term link
120	*
121	* @since 0.7
122	*
123	* @param string $link term link
124	* @param object $post term object
125	* @param string $tax taxonomy name
126	* @return string modified term link
127	*/
128	public function term_link($link, $term, $tax) {
129	if ($this->model->is_translated_taxonomy($tax)) {
130	$lang = $this->model->get_term_language($term->term_id);
131	$link = $this->options['force_lang'] ? $this->links_model->add_language_to_link($link, $lang) : $link;
132	$link = apply_filters('pll_term_link', $link, $lang, $term);
133	}
134
135	return $link;
136	}
137
138	/*
139	* FIXME: keeps the preview post link on default domain when using multiple domains
140	*
141	* @since 1.6.1
142	*
143	* @param string $url
144	* @return string modified url
145	*/
146	public function preview_post_link($url) {
147	return $this->links_model->remove_language_from_link($url);
148	}
149
150	/*
151	* returns the home url in the requested language
152	*
153	* @since 1.3
154	*
155	* @param object\|string $language
156	* @param bool $is_search optional wether we need the home url for a search form, defaults to false
157	*/
158	public function get_home_url($language, $is_search = false) {
159	$language = is_object($language) ? $language : $this->model->get_language($language);
160	return $is_search ? $language->search_url : $language->home_url;
161	}
162
163	/*
164	* get the link to create a new post translation
165	*
166	* @since 1.5
167	*
168	* @param int $post_id
169	* @param object $language
170	* @return string
171	*/
172	public function get_new_post_translation_link($post_id, $language) {
173	$post_type = get_post_type($post_id);
174
175	if ('attachment' == $post_type) {
176	$args = array(
177	'action' => 'translate_media',
178	'from_media' => $post_id,
179	'new_lang' => $language->slug
180	);
181
182	// add nonce for media as we will directly publish a new attachment from a clic on this link
183	return wp_nonce_url(add_query_arg($args, admin_url('admin.php')), 'translate_media');
184	}
185	else {
186	$args = array(
187	'post_type' => $post_type,
188	'from_post' => $post_id,
189	'new_lang' => $language->slug
190	);
191
192	return add_query_arg($args, admin_url('post-new.php'));
193	}
194	}
195
196	/*
197	* get the link to create a new term translation
198	*
199	* @since 1.5
200	*
201	* @param int $term_id
202	* @param string $taxonomy
203	* @param string $post_type
204	* @param object $language
205	* @return string
206	*/
207	public function get_new_term_translation_link($term_id, $taxonomy, $post_type, $language) {
208	$args = array(
209	'taxonomy' => $taxonomy,
210	'post_type' => $post_type,
211	'from_tag' => $term_id,
212	'new_lang' => $language->slug
213	);
214
215	return add_query_arg($args, admin_url('edit-tags.php'));
216	}
217
218	/*
219	* checks if the current user can read the post
220	*
221	* @since 1.5
222	*
223	* @param int $post_id
224	* @return bool
225	*/
226	public function current_user_can_read($post_id) {
227	$post = get_post($post_id);
228	if (in_array($post->post_status, get_post_stati(array('public' => true))))
229	return true;
230
231	$post_type_object = get_post_type_object($post->post_type);
232	$user = wp_get_current_user();
233	return is_user_logged_in() && (current_user_can($post_type_object->cap->read_private_posts) \|\| $user->ID == $post->post_author);
234	}
235	}
236
237