polylang / include / links-model.php

links-model.php in Polylang 2.5.4, at include/links-model.php

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1	<?php
2
3	/**
4	* Links model abstract class
5	*
6	* @since 1.5
7	*/
8	abstract class PLL_Links_Model {
9	public $model, $options;
10	public $home; // used to store the home url before it is filtered
11	public $using_permalinks;
12
13	/**
14	* Constructor
15	*
16	* @since 1.5
17	*
18	* @param object $model PLL_Model instance
19	*/
20	public function __construct( &$model ) {
21	$this->model = &$model;
22	$this->options = &$model->options;
23
24	$this->home = home_url();
25
26	add_filter( 'pll_languages_list', array( $this, 'pll_languages_list' ), 4 ); // after PLL_Static_Pages
27	add_filter( 'pll_after_languages_cache', array( $this, 'pll_after_languages_cache' ) );
28
29	// adds our domains or subdomains to allowed hosts for safe redirection
30	add_filter( 'allowed_redirect_hosts', array( $this, 'allowed_redirect_hosts' ) );
31	}
32
33	/**
34	* Changes the language code in url
35	*
36	* @since 1.5
37	*
38	* @param string $url url to modify
39	* @param object $lang language
40	* @return string modified url
41	*/
42	public function switch_language_in_link( $url, $lang ) {
43	$url = $this->remove_language_from_link( $url );
44	return $this->add_language_to_link( $url, $lang );
45	}
46
47	/**
48	* Get hosts managed on the website
49	*
50	* @since 1.5
51	*
52	* @return array list of hosts
53	*/
54	public function get_hosts() {
55	return array( parse_url( $this->home, PHP_URL_HOST ) );
56	}
57
58	/**
59	* Returns the home url
60	*
61	* @since 1.3.1
62	*
63	* @param object $lang PLL_Language object
64	* @return string
65	*/
66	public function home_url( $lang ) {
67	$url = trailingslashit( $this->home );
68	return $this->options['hide_default'] && $lang->slug == $this->options['default_lang'] ? $url : $this->add_language_to_link( $url, $lang );
69	}
70
71	/**
72	* Sets the home urls
73	*
74	* @since 1.8
75	*
76	* @param object $language
77	*/
78	protected function set_home_url( $language ) {
79	$search_url = $this->home_url( $language );
80	$home_url = empty( $language->page_on_front ) \|\| $this->options['redirect_lang'] ? $search_url : $this->front_page_url( $language );
81	$language->set_home_url( $search_url, $home_url );
82	}
83
84	/**
85	* Sets the home urls and flags before the languages are persistently cached
86	*
87	* @since 1.8
88	*
89	* @param array $languages array of PLL_Language objects
90	* @return array
91	*/
92	public function pll_languages_list( $languages ) {
93	foreach ( $languages as $language ) {
94	$this->set_home_url( $language );
95	$language->set_flag();
96	}
97	return $languages;
98	}
99
100	/**
101	* Sets the home urls when not cached
102	* Sets the home urls scheme
103	*
104	* @since 1.8
105	*
106	* @param array $languages array of PLL_Language objects
107	* @return array
108	*/
109	public function pll_after_languages_cache( $languages ) {
110	foreach ( $languages as $language ) {
111	// Get the home urls when not cached
112	if ( ( defined( 'PLL_CACHE_LANGUAGES' ) && ! PLL_CACHE_LANGUAGES ) \|\| ( defined( 'PLL_CACHE_HOME_URL' ) && ! PLL_CACHE_HOME_URL ) ) {
113	$this->set_home_url( $language );
114	}
115
116	// Ensures that the ( possibly cached ) home url uses the right scheme http or https
117	$language->set_home_url_scheme();
118	}
119	return $languages;
120	}
121
122	/**
123	* Adds our domains or subdomains to allowed hosts for safe redirection
124	*
125	* @since 1.4.3
126	*
127	* @param array $hosts allowed hosts
128	* @return array
129	*/
130	public function allowed_redirect_hosts( $hosts ) {
131	return array_unique( array_merge( $hosts, array_values( $this->get_hosts() ) ) );
132	}
133	}
134