polylang / include / filters-links.php

filters-links.php in Polylang 2.8.3, 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	public $links, $links_model, $model, $options, $curlang;
13
14	/**
15	* Constructor
16	*
17	* @since 1.8
18	*
19	* @param object $polylang
20	*/
21	public function __construct( &$polylang ) {
22	$this->links = &$polylang->links;
23	$this->links_model = &$polylang->links_model;
24	$this->model = &$polylang->model;
25	$this->options = &$polylang->options;
26	$this->curlang = &$polylang->curlang;
27
28	// Low priority on links filters to come after any other modifications.
29	if ( $this->options['force_lang'] ) {
30	add_filter( 'post_link', array( $this, 'post_type_link' ), 20, 2 );
31	add_filter( '_get_page_link', array( $this, '_get_page_link' ), 20, 2 );
32	}
33
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	if ( $this->options['force_lang'] > 0 ) {
38	add_filter( 'attachment_link', array( $this, 'attachment_link' ), 20, 2 );
39	}
40
41	// Keeps the preview post link on default domain when using multiple domains and SSO is not available.
42	if ( 3 === $this->options['force_lang'] && ! class_exists( 'PLL_Xdata_Domain' ) ) {
43	add_filter( 'preview_post_link', array( $this, 'preview_post_link' ), 20 );
44	}
45
46	// Rewrites post types archives links to filter them by language.
47	add_filter( 'post_type_archive_link', array( $this, 'post_type_archive_link' ), 20, 2 );
48	}
49
50	/**
51	* Modifies page links
52	*
53	* @since 1.7
54	*
55	* @param string $link post link
56	* @param int $post_id post ID
57	* @return string modified post link
58	*/
59	public function _get_page_link( $link, $post_id ) {
60	// /!\ WP does not use pretty permalinks for preview
61	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 ) );
62	}
63
64	/**
65	* Modifies attachment links
66	*
67	* @since 1.6.2
68	*
69	* @param string $link attachment link
70	* @param int $post_id attachment link
71	* @return string modified attachment link
72	*/
73	public function attachment_link( $link, $post_id ) {
74	return wp_get_post_parent_id( $post_id ) ? $link : $this->links_model->switch_language_in_link( $link, $this->model->post->get_language( $post_id ) );
75	}
76
77	/**
78	* Modifies custom posts links
79	*
80	* @since 1.6
81	*
82	* @param string $link post link
83	* @param object $post post object
84	* @return string modified post link
85	*/
86	public function post_type_link( $link, $post ) {
87	// /!\ WP does not use pretty permalinks for preview
88	if ( ( false === strpos( $link, 'preview=true' ) \|\| false === strpos( $link, 'p=' ) ) && $this->model->is_translated_post_type( $post->post_type ) ) {
89	$lang = $this->model->post->get_language( $post->ID );
90	$link = $this->options['force_lang'] ? $this->links_model->switch_language_in_link( $link, $lang ) : $link;
91
92	/**
93	* Filter a post or custom post type link
94	*
95	* @since 1.6
96	*
97	* @param string $link the post link
98	* @param object $lang the current language
99	* @param object $post the post object
100	*/
101	$link = apply_filters( 'pll_post_type_link', $link, $lang, $post );
102	}
103
104	return $link;
105	}
106
107	/**
108	* Modifies term link
109	*
110	* @since 0.7
111	*
112	* @param string $link term link
113	* @param object $term term object
114	* @param string $tax taxonomy name
115	* @return string modified term link
116	*/
117	public function term_link( $link, $term, $tax ) {
118	if ( $this->model->is_translated_taxonomy( $tax ) ) {
119	$lang = $this->model->term->get_language( $term->term_id );
120	$link = $this->options['force_lang'] ? $this->links_model->switch_language_in_link( $link, $lang ) : $link;
121
122	/**
123	* Filter a term link
124	*
125	* @since 1.6
126	*
127	* @param string $link the term link
128	* @param object $lang the current language
129	* @param object $term the term object
130	*/
131	return apply_filters( 'pll_term_link', $link, $lang, $term );
132	}
133
134	// in case someone calls get_term_link for the 'language' taxonomy
135	if ( 'language' === $tax ) {
136	return $this->links_model->home_url( $term );
137	}
138
139	return $link;
140	}
141
142	/**
143	* Keeps the preview post link on default domain when using multiple domains
144	*
145	* @since 1.6.1
146	*
147	* @param string $url
148	* @return string modified url
149	*/
150	public function preview_post_link( $url ) {
151	return $this->links_model->remove_language_from_link( $url );
152	}
153
154	/**
155	* Modifies the post type archive links to add the language parameter
156	* only if the post type is translated
157	*
158	* The filter was originally only on frontend but is needed on admin too for
159	* compatibility with the archive link of the ACF link field since ACF 5.4.0
160	*
161	* @since 1.7.6
162	*
163	* @param string $link
164	* @param string $post_type
165	* @return string modified link
166	*/
167	public function post_type_archive_link( $link, $post_type ) {
168	return $this->model->is_translated_post_type( $post_type ) && 'post' !== $post_type ? $this->links_model->switch_language_in_link( $link, $this->curlang ) : $link;
169	}
170	}
171
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