polylang / include / mo.php

mo.php in Polylang 2.8, at include/mo.php

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1	<?php
2	/**
3	* @package Polylang
4	*/
5
6	/**
7	* Manages strings translations storage
8	*
9	* @since 1.2
10	* @since 2.1 Stores the strings in a post meta instead of post content to avoid unserialize issues (See #63)
11	*/
12	class PLL_MO extends MO {
13
14	/**
15	* Registers the polylang_mo custom post type, only at first object creation
16	*
17	* @since 1.2
18	*/
19	public function __construct() {
20	if ( ! post_type_exists( 'polylang_mo' ) ) {
21	$labels = array( 'name' => __( 'Strings translations', 'polylang' ) );
22	register_post_type( 'polylang_mo', array( 'labels' => $labels, 'rewrite' => false, 'query_var' => false, '_pll' => true ) );
23
24	add_action( 'pll_add_language', array( $this, 'clean_cache' ) );
25	}
26	}
27
28	/**
29	* Writes a PLL_MO object into a custom post meta
30	*
31	* @since 1.2
32	*
33	* @param object $lang The language in which we want to export strings
34	*/
35	public function export_to_db( $lang ) {
36	$this->add_entry( $this->make_entry( '', '' ) ); // Empty string translation, just in case
37
38	// Would be convenient to store the whole object but it would take a huge space in DB
39	// So let's keep only the strings in an array
40	$strings = array();
41	foreach ( $this->entries as $entry ) {
42	$strings[] = array( $entry->singular, $this->translate( $entry->singular ) );
43	}
44
45	$strings = wp_slash( $strings ); // Avoid breaking slashed strings in update_post_meta. See https://codex.wordpress.org/Function_Reference/update_post_meta#Character_Escaping
46
47	if ( empty( $lang->mo_id ) ) {
48	$post = array(
49	'post_title' => 'polylang_mo_' . $lang->term_id,
50	'post_status' => 'private', // To avoid a conflict with WP Super Cache. See https://wordpress.org/support/topic/polylang_mo-and-404s-take-2
51	'post_type' => 'polylang_mo',
52	);
53	$mo_id = wp_insert_post( $post );
54	update_post_meta( $mo_id, '_pll_strings_translations', $strings );
55	} else {
56	update_post_meta( $lang->mo_id, '_pll_strings_translations', $strings );
57	}
58	}
59
60	/**
61	* Reads a PLL_MO object from a custom post meta
62	*
63	* @since 1.2
64	*
65	* @param object $lang The language in which we want to get strings
66	*/
67	public function import_from_db( $lang ) {
68	if ( ! empty( $lang->mo_id ) ) {
69	$strings = get_post_meta( $lang->mo_id, '_pll_strings_translations', true );
70	if ( is_array( $strings ) ) {
71	foreach ( $strings as $msg ) {
72	$this->add_entry( $this->make_entry( $msg[0], $msg[1] ) );
73	}
74	}
75	}
76	}
77
78	/**
79	* Returns the post id of the post storing the strings translations
80	*
81	* @since 1.4
82	*
83	* @param object $lang
84	* @return int
85	*/
86	public static function get_id( $lang ) {
87	global $wpdb;
88
89	$ids = wp_cache_get( 'polylang_mo_ids' );
90
91	if ( empty( $ids ) ) {
92	$ids = $wpdb->get_results( "SELECT post_title, ID FROM $wpdb->posts WHERE post_type='polylang_mo'", OBJECT_K );
93	wp_cache_add( 'polylang_mo_ids', $ids );
94	}
95
96	// The mo id for a language can be transiently empty
97	return isset( $ids[ 'polylang_mo_' . $lang->term_id ] ) ? $ids[ 'polylang_mo_' . $lang->term_id ]->ID : null;
98	}
99
100	/**
101	* Invalidate the cache when adding a new language
102	*
103	* @since 2.0.5
104	*/
105	public function clean_cache() {
106	wp_cache_delete( 'polylang_mo_ids' );
107	}
108	}
109