polylang / admin / admin-static-pages.php

admin-static-pages.php in Polylang 2.3.7, at admin/admin-static-pages.php

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1	<?php
2
3	/**
4	* Manages the static front page and the page for posts on admin side
5	*
6	* @since 1.8
7	*/
8	class PLL_Admin_Static_Pages extends PLL_Static_Pages {
9
10	/**
11	* Constructor: setups filters and actions
12	*
13	* @since 1.8
14	*
15	* @param object $polylang
16	*/
17	public function __construct( &$polylang ) {
18	parent::__construct( $polylang );
19
20	// Removes the editor and the template select dropdown for pages for posts
21	add_action( 'add_meta_boxes', array( $this, 'add_meta_boxes' ), 10, 2 );
22
23	// Add post state for translations of the front page and posts page
24	add_filter( 'display_post_states', array( $this, 'display_post_states' ), 10, 2 );
25
26	// Refresh language cache when a static front page has been translated
27	add_action( 'pll_save_post', array( $this, 'pll_save_post' ), 10, 3 );
28
29	// Checks if chosen page on front is translated
30	add_filter( 'pre_update_option_page_on_front', array( $this, 'update_page_on_front' ), 10, 2 );
31	add_filter( 'customize_validate_page_on_front', array( $this, 'customize_validate_page_on_front' ), 10, 2 );
32
33	// Prevents WP resetting the option
34	add_filter( 'pre_update_option_show_on_front', array( $this, 'update_show_on_front' ), 10, 2 );
35	}
36
37	/**
38	* Removes the editor for translations of the pages for posts
39	* Removes the page template select dropdown in page attributes metabox too
40	*
41	* @since 2.2.2
42	*
43	* @param string $post_type Current post type
44	* @param object $post Current post
45	*/
46	function add_meta_boxes( $post_type, $post ) {
47	if ( 'page' === $post_type ) {
48	add_filter( 'option_page_for_posts', array( $this, 'translate_page_for_posts' ) );
49
50	if ( ( get_option( 'page_for_posts' ) == $post->ID ) && empty( $post->post_content ) ) {
51	add_action( 'edit_form_after_title', '_wp_posts_page_notice' );
52	remove_post_type_support( $post_type, 'editor' );
53	}
54	}
55	}
56
57	/**
58	* Add post state for translations of the front page and posts page
59	*
60	* @since 1.8
61	*
62	* @param array $post_states
63	* @param object $post
64	* @return array
65	*/
66	public function display_post_states( $post_states, $post ) {
67	if ( in_array( $post->ID, $this->model->get_languages_list( array( 'fields' => 'page_on_front' ) ) ) ) {
68	$post_states['page_on_front'] = __( 'Front Page' );
69	}
70
71	if ( in_array( $post->ID, $this->model->get_languages_list( array( 'fields' => 'page_for_posts' ) ) ) ) {
72	$post_states['page_for_posts'] = __( 'Posts Page' );
73	}
74
75	return $post_states;
76	}
77
78	/**
79	* Refresh language cache when a static front page has been translated
80	*
81	* @since 1.8
82	*
83	* @param int $post_id Not used
84	* @param object $post Not used
85	* @param array $translations
86	*/
87	public function pll_save_post( $post_id, $post, $translations ) {
88	if ( in_array( $this->page_on_front, $translations ) ) {
89	$this->model->clean_languages_cache();
90	}
91	}
92
93	/**
94	* Checks if a page is translated in all languages
95	*
96	* @since 2.2
97	*
98	* @param int $page_id
99	* @return bool
100	*/
101	protected function is_page_translated( $page_id ) {
102	if ( $page_id ) {
103	$translations = count( $this->model->post->get_translations( $page_id ) );
104	$languages = count( $this->model->get_languages_list() );
105
106	if ( $languages > 1 && $translations != $languages ) {
107	return false;
108	}
109	}
110
111	return true;
112	}
113
114	/**
115	* Prevents choosing an untranslated static front page
116	* Displays an error message
117	*
118	* @since 1.6
119	*
120	* @param int $page_id New page on front page id
121	* @param int $old_id Old page on front page_id
122	* @return int
123	*/
124	public function update_page_on_front( $page_id, $old_id ) {
125	if ( ! $this->is_page_translated( $page_id ) ) {
126	$page_id = $old_id;
127	add_settings_error( 'reading', 'pll_page_on_front_error', __( 'The chosen static front page must be translated in all languages.', 'polylang' ) );
128	}
129
130	return $page_id;
131	}
132
133	/**
134	* Displays an error message in the customizer when choosing an untranslated static front page
135	*
136	* @since 2.2
137	*
138	* @param object $validity WP_Error object
139	* @param int $page_id New page on front page id
140	* @return object
141	*/
142	public function customize_validate_page_on_front( $validity, $page_id ) {
143	if ( ! $this->is_page_translated( $page_id ) ) {
144	return new WP_Error( 'pll_page_on_front_error', __( 'The chosen static front page must be translated in all languages.', 'polylang' ) );
145	}
146
147	return $validity;
148	}
149
150	/**
151	* Prevents WP resetting the option if the admin language filter is active for a language with no pages
152	*
153	* @since 1.9.3
154	*
155	* @param string $value
156	* @param string $old_value
157	* @return string
158	*/
159	public function update_show_on_front( $value, $old_value ) {
160	if ( ! empty( $GLOBALS['pagenow'] ) && 'options-reading.php' === $GLOBALS['pagenow'] && 'posts' === $value && ! get_pages() && get_pages( array( 'lang' => '' ) ) ) {
161	$value = $old_value;
162	}
163	return $value;
164	}
165	}
166