polylang / include / filters-links.php

filters-links.php in Polylang 2.6.2, at include/filters-links.php

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1	<?php
2
3	/**
4	* Manages links filters needed on both frontend and admin
5	*
6	* @since 1.8
7	*/
8	class PLL_Filters_Links {
9	public $links, $links_model, $model, $options, $curlang;
10
11	/**
12	* Constructor
13	*
14	* @since 1.8
15	*
16	* @param object $polylang
17	*/
18	public function __construct( &$polylang ) {
19	$this->links = &$polylang->links;
20	$this->links_model = &$polylang->links_model;
21	$this->model = &$polylang->model;
22	$this->options = &$polylang->options;
23	$this->curlang = &$polylang->curlang;
24
25	// Low priority on links filters to come after any other modifications
26	if ( $this->options['force_lang'] ) {
27	add_filter( 'post_link', array( $this, 'post_type_link' ), 20, 2 );
28	add_filter( '_get_page_link', array( $this, '_get_page_link' ), 20, 2 );
29	}
30
31	add_filter( 'post_type_link', array( $this, 'post_type_link' ), 20, 2 );
32	add_filter( 'term_link', array( $this, 'term_link' ), 20, 3 );
33
34	if ( $this->options['force_lang'] > 0 ) {
35	add_filter( 'attachment_link', array( $this, 'attachment_link' ), 20, 2 );
36	}
37
38	if ( 3 === $this->options['force_lang'] ) {
39	add_filter( 'preview_post_link', array( $this, 'preview_post_link' ), 20 );
40	}
41
42	// Rewrites post types archives links to filter them by language
43	add_filter( 'post_type_archive_link', array( $this, 'post_type_archive_link' ), 20, 2 );
44	}
45
46	/**
47	* Modifies page links
48	*
49	* @since 1.7
50	*
51	* @param string $link post link
52	* @param int $post_id post ID
53	* @return string modified post link
54	*/
55	public function _get_page_link( $link, $post_id ) {
56	// /!\ WP does not use pretty permalinks for preview
57	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 ) );
58	}
59
60	/**
61	* Modifies attachment links
62	*
63	* @since 1.6.2
64	*
65	* @param string $link attachment link
66	* @param int $post_id attachment link
67	* @return string modified attachment link
68	*/
69	public function attachment_link( $link, $post_id ) {
70	return wp_get_post_parent_id( $post_id ) ? $link : $this->links_model->switch_language_in_link( $link, $this->model->post->get_language( $post_id ) );
71	}
72
73	/**
74	* Modifies custom posts links
75	*
76	* @since 1.6
77	*
78	* @param string $link post link
79	* @param object $post post object
80	* @return string modified post link
81	*/
82	public function post_type_link( $link, $post ) {
83	// /!\ WP does not use pretty permalinks for preview
84	if ( ( false === strpos( $link, 'preview=true' ) \|\| false === strpos( $link, 'p=' ) ) && $this->model->is_translated_post_type( $post->post_type ) ) {
85	$lang = $this->model->post->get_language( $post->ID );
86	$link = $this->options['force_lang'] ? $this->links_model->switch_language_in_link( $link, $lang ) : $link;
87
88	/**
89	* Filter a post or custom post type link
90	*
91	* @since 1.6
92	*
93	* @param string $link the post link
94	* @param object $lang the current language
95	* @param object $post the post object
96	*/
97	$link = apply_filters( 'pll_post_type_link', $link, $lang, $post );
98	}
99
100	return $link;
101	}
102
103	/**
104	* Modifies term link
105	*
106	* @since 0.7
107	*
108	* @param string $link term link
109	* @param object $term term object
110	* @param string $tax taxonomy name
111	* @return string modified term link
112	*/
113	public function term_link( $link, $term, $tax ) {
114	if ( $this->model->is_translated_taxonomy( $tax ) ) {
115	$lang = $this->model->term->get_language( $term->term_id );
116	$link = $this->options['force_lang'] ? $this->links_model->switch_language_in_link( $link, $lang ) : $link;
117
118	/**
119	* Filter a term link
120	*
121	* @since 1.6
122	*
123	* @param string $link the term link
124	* @param object $lang the current language
125	* @param object $term the term object
126	*/
127	return apply_filters( 'pll_term_link', $link, $lang, $term );
128	}
129
130	// in case someone calls get_term_link for the 'language' taxonomy
131	if ( 'language' === $tax ) {
132	return $this->links_model->home_url( $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	* Modifies the post type archive links to add the language parameter
152	* only if the post type is translated
153	*
154	* The filter was originally only on frontend but is needed on admin too for
155	* compatibility with the archive link of the ACF link field since ACF 5.4.0
156	*
157	* @since 1.7.6
158	*
159	* @param string $link
160	* @param string $post_type
161	* @return string modified link
162	*/
163	public function post_type_archive_link( $link, $post_type ) {
164	return $this->model->is_translated_post_type( $post_type ) && 'post' !== $post_type ? $this->links_model->switch_language_in_link( $link, $this->curlang ) : $link;
165	}
166	}
167
168