polylang / include / filters-links.php

filters-links.php in Polylang 3.1.4, at include/filters-links.php

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1	<?php
2	/**
3	* @package Polylang
4	*/
5
6	/**
7	* Manages links filters needed on both frontend and admin
8	*
9	* @since 1.8
10	*/
11	class PLL_Filters_Links {
12	/**
13	* Stores the plugin options.
14	*
15	* @var array
16	*/
17	public $options;
18
19	/**
20	* @var PLL_Model
21	*/
22	public $model;
23
24	/**
25	* Instance of a child class of PLL_Links_Model.
26	*
27	* @var PLL_Links_Model
28	*/
29	public $links_model;
30
31	/**
32	* @var PLL_Links
33	*/
34	public $links;
35
36	/**
37	* Current language.
38	*
39	* @var PLL_Language
40	*/
41	public $curlang;
42
43	/**
44	* Constructor
45	*
46	* @since 1.8
47	*
48	* @param object $polylang
49	*/
50	public function __construct( &$polylang ) {
51	$this->links = &$polylang->links;
52	$this->links_model = &$polylang->links_model;
53	$this->model = &$polylang->model;
54	$this->options = &$polylang->options;
55	$this->curlang = &$polylang->curlang;
56
57	// Low priority on links filters to come after any other modifications.
58	if ( $this->options['force_lang'] ) {
59	add_filter( 'post_link', array( $this, 'post_type_link' ), 20, 2 );
60	add_filter( '_get_page_link', array( $this, '_get_page_link' ), 20, 2 );
61	}
62
63	add_filter( 'post_type_link', array( $this, 'post_type_link' ), 20, 2 );
64	add_filter( 'term_link', array( $this, 'term_link' ), 20, 3 );
65
66	if ( $this->options['force_lang'] > 0 ) {
67	add_filter( 'attachment_link', array( $this, 'attachment_link' ), 20, 2 );
68	}
69
70	// Keeps the preview post link on default domain when using multiple domains and SSO is not available.
71	if ( 3 === $this->options['force_lang'] && ! class_exists( 'PLL_Xdata_Domain' ) ) {
72	add_filter( 'preview_post_link', array( $this, 'preview_post_link' ), 20 );
73	}
74
75	// Rewrites post types archives links to filter them by language.
76	add_filter( 'post_type_archive_link', array( $this, 'post_type_archive_link' ), 20, 2 );
77	}
78
79	/**
80	* Modifies page links
81	*
82	* @since 1.7
83	*
84	* @param string $link post link
85	* @param int $post_id post ID
86	* @return string modified post link
87	*/
88	public function _get_page_link( $link, $post_id ) {
89	// /!\ WP does not use pretty permalinks for preview
90	return false !== strpos( $link, 'preview=true' ) && false !== strpos( $link, 'page_id=' ) ? $link : $this->links_model->switch_language_in_link( $link, $this->model->post->get_language( $post_id ) );
91	}
92
93	/**
94	* Modifies attachment links
95	*
96	* @since 1.6.2
97	*
98	* @param string $link attachment link
99	* @param int $post_id attachment link
100	* @return string modified attachment link
101	*/
102	public function attachment_link( $link, $post_id ) {
103	return wp_get_post_parent_id( $post_id ) ? $link : $this->links_model->switch_language_in_link( $link, $this->model->post->get_language( $post_id ) );
104	}
105
106	/**
107	* Modifies custom posts links.
108	*
109	* @since 1.6
110	*
111	* @param string $link Post link.
112	* @param WP_Post $post Post object.
113	* @return string Modified post link.
114	*/
115	public function post_type_link( $link, $post ) {
116	// /!\ WP does not use pretty permalinks for preview
117	if ( ( false === strpos( $link, 'preview=true' ) \|\| false === strpos( $link, 'p=' ) ) && $this->model->is_translated_post_type( $post->post_type ) ) {
118	$lang = $this->model->post->get_language( $post->ID );
119	$link = $this->options['force_lang'] ? $this->links_model->switch_language_in_link( $link, $lang ) : $link;
120
121	/**
122	* Filters a post or custom post type link.
123	*
124	* @since 1.6
125	*
126	* @param string $link The post link.
127	* @param PLL_Language $lang The current language.
128	* @param WP_Post $post The post object.
129	*/
130	$link = apply_filters( 'pll_post_type_link', $link, $lang, $post );
131	}
132
133	return $link;
134	}
135
136	/**
137	* Modifies term links.
138	*
139	* @since 0.7
140	*
141	* @param string $link Term link.
142	* @param WP_Term $term Term object.
143	* @param string $tax Taxonomy name;
144	* @return string Modified term link.
145	*/
146	public function term_link( $link, $term, $tax ) {
147	if ( $this->model->is_translated_taxonomy( $tax ) ) {
148	$lang = $this->model->term->get_language( $term->term_id );
149	$link = $this->options['force_lang'] ? $this->links_model->switch_language_in_link( $link, $lang ) : $link;
150
151	/**
152	* Filter a term link
153	*
154	* @since 1.6
155	*
156	* @param string $link The term link.
157	* @param PLL_Language $lang The current language.
158	* @param WP_Term $term The term object.
159	*/
160	return apply_filters( 'pll_term_link', $link, $lang, $term );
161	}
162
163	// In case someone calls get_term_link for the 'language' taxonomy.
164	if ( 'language' === $tax ) {
165	$lang = $this->model->get_language( $term->term_id );
166	return $this->links_model->home_url( $lang );
167	}
168
169	return $link;
170	}
171
172	/**
173	* Keeps the preview post link on default domain when using multiple domains
174	*
175	* @since 1.6.1
176	*
177	* @param string $url
178	* @return string modified url
179	*/
180	public function preview_post_link( $url ) {
181	return $this->links_model->remove_language_from_link( $url );
182	}
183
184	/**
185	* Modifies the post type archive links to add the language parameter
186	* only if the post type is translated
187	*
188	* The filter was originally only on frontend but is needed on admin too for
189	* compatibility with the archive link of the ACF link field since ACF 5.4.0
190	*
191	* @since 1.7.6
192	*
193	* @param string $link
194	* @param string $post_type
195	* @return string modified link
196	*/
197	public function post_type_archive_link( $link, $post_type ) {
198	return $this->model->is_translated_post_type( $post_type ) && 'post' !== $post_type ? $this->links_model->switch_language_in_link( $link, $this->curlang ) : $link;
199	}
200	}
201
202