polylang / include / static-pages.php

static-pages.php in Polylang 3.2.2, at include/static-pages.php

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1	<?php
2	/**
3	* @package Polylang
4	*/
5
6	/**
7	* Base class to manage the static front page and the page for posts
8	*
9	* @since 1.8
10	*/
11	class PLL_Static_Pages {
12	/**
13	* Id of the page on front.
14	*
15	* @var int
16	*/
17	public $page_on_front;
18
19	/**
20	* Id of the page for posts.
21	*
22	* @var int
23	*/
24	public $page_for_posts;
25
26	/**
27	* Stores the plugin options.
28	*
29	* @var array
30	*/
31	protected $options;
32
33	/**
34	* @var PLL_Model
35	*/
36	protected $model;
37
38	/**
39	* Current language.
40	*
41	* @var PLL_Language
42	*/
43	protected $curlang;
44
45	/**
46	* Constructor: setups filters and actions
47	*
48	* @since 1.8
49	*
50	* @param object $polylang
51	*/
52	public function __construct( &$polylang ) {
53	$this->model = &$polylang->model;
54	$this->options = &$polylang->options;
55	$this->curlang = &$polylang->curlang;
56
57	$this->init();
58
59	// Modifies the page link in case the front page is not in the default language
60	add_filter( 'page_link', array( $this, 'page_link' ), 20, 2 );
61
62	// Clean the languages cache when editing page of front, page for posts
63	add_action( 'update_option_show_on_front', array( $this->model, 'clean_languages_cache' ) );
64	add_action( 'update_option_page_on_front', array( $this->model, 'clean_languages_cache' ) );
65	add_action( 'update_option_page_for_posts', array( $this->model, 'clean_languages_cache' ) );
66
67	// Refresh rewrite rules when the page on front is modified
68	add_action( 'update_option_page_on_front', 'flush_rewrite_rules' );
69
70	// OEmbed
71	add_filter( 'oembed_request_post_id', array( $this, 'oembed_request_post_id' ), 10, 2 );
72	}
73
74	/**
75	* Stores the page on front and page for posts ids
76	*
77	* @since 1.8
78	*
79	* @return void
80	*/
81	public function init() {
82	if ( 'page' == get_option( 'show_on_front' ) ) {
83	$this->page_on_front = get_option( 'page_on_front' );
84	$this->page_for_posts = get_option( 'page_for_posts' );
85	} else {
86	$this->page_on_front = 0;
87	$this->page_for_posts = 0;
88	}
89	}
90
91	/**
92	* Modifies the page link in case the front page is not in the default language
93	*
94	* @since 0.7.2
95	*
96	* @param string $link link to the page
97	* @param int $id post id of the page
98	* @return string modified link
99	*/
100	public function page_link( $link, $id ) {
101	$lang = $this->model->post->get_language( $id );
102
103	if ( $lang && $id == $lang->page_on_front ) {
104	return $lang->home_url;
105	}
106	return $link;
107	}
108
109	/**
110	* Adds page_on_front and page_for_posts properties to the language objects.
111	*
112	* @since 1.8
113	*
114	* @param PLL_Language[] $languages The list of languages.
115	* @param PLL_Model $model The instance of PLL_Model.
116	* @return PLL_Language[]
117	*/
118	public static function pll_languages_list( $languages, $model ) {
119	if ( 'page' === get_option( 'show_on_front' ) ) {
120	foreach ( $languages as $k => $language ) {
121	$languages[ $k ]->page_on_front = $model->post->get( get_option( 'page_on_front' ), $language );
122	$languages[ $k ]->page_for_posts = $model->post->get( get_option( 'page_for_posts' ), $language );
123	}
124	}
125
126	return $languages;
127	}
128
129	/**
130	* Translates page for posts
131	*
132	* @since 1.8
133	*
134	* @param int $v page for posts page id
135	* @return int
136	*/
137	public function translate_page_for_posts( $v ) {
138	// Don't attempt to translate in a 'switch_blog' action as there is a risk to call this function while initializing the languages cache
139	return isset( $this->curlang->page_for_posts ) && ( $this->curlang->page_for_posts ) && ! doing_action( 'switch_blog' ) ? $this->curlang->page_for_posts : $v;
140	}
141
142	/**
143	* Fixes the oembed for the translated static front page
144	* when the language page is redirected to the front page
145	*
146	* @since 2.6
147	*
148	* @param int $post_id The post ID.
149	* @param string $url The requested URL.
150	* @return int
151	*/
152	public function oembed_request_post_id( $post_id, $url ) {
153	foreach ( $this->model->get_languages_list() as $lang ) {
154	if ( trailingslashit( $url ) === trailingslashit( $lang->home_url ) ) {
155	$post_id = $lang->page_on_front;
156	}
157	}
158	return $post_id;
159	}
160	}
161