polylang / include / static-pages.php

static-pages.php in Polylang 2.7, at include/static-pages.php

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