polylang / modules / wpml / wpml-compat.php

wpml-compat.php in Polylang 2.6.2, at modules/wpml/wpml-compat.php

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1	<?php
2
3	/**
4	* WPML Compatibility class
5	* Defines some WPML constants
6	* Registers strings in a persistent way as done by WPML
7	*
8	* @since 1.0.2
9	*/
10	class PLL_WPML_Compat {
11	protected static $instance; // For singleton
12	protected static $strings; // Used for cache
13	public $api;
14
15	/**
16	* Constructor
17	*
18	* @since 1.0.2
19	*/
20	protected function __construct() {
21	// Load the WPML API
22	require_once PLL_MODULES_INC . '/wpml/wpml-legacy-api.php';
23	$this->api = new PLL_WPML_API();
24
25	self::$strings = get_option( 'polylang_wpml_strings', array() );
26
27	add_action( 'pll_language_defined', array( $this, 'define_constants' ) );
28	add_action( 'pll_no_language_defined', array( $this, 'define_constants' ) );
29	add_filter( 'pll_get_strings', array( $this, 'get_strings' ) );
30	}
31
32	/**
33	* Access to the single instance of the class
34	*
35	* @since 1.7
36	*
37	* @return object
38	*/
39	public static function instance() {
40	if ( empty( self::$instance ) ) {
41	self::$instance = new self();
42	}
43	return self::$instance;
44	}
45
46	/**
47	* Defines two WPML constants once the language has been defined
48	* The compatibility with WPML is not perfect on admin side as the constants are defined
49	* in 'setup_theme' by Polylang ( based on user info ) and 'plugins_loaded' by WPML ( based on cookie )
50	*
51	* @since 0.9.5
52	*/
53	public function define_constants() {
54	if ( ! empty( PLL()->curlang ) ) {
55	if ( ! defined( 'ICL_LANGUAGE_CODE' ) ) {
56	define( 'ICL_LANGUAGE_CODE', PLL()->curlang->slug );
57	}
58
59	if ( ! defined( 'ICL_LANGUAGE_NAME' ) ) {
60	define( 'ICL_LANGUAGE_NAME', PLL()->curlang->name );
61	}
62	} elseif ( ! PLL() instanceof PLL_Frontend ) {
63	if ( ! defined( 'ICL_LANGUAGE_CODE' ) ) {
64	define( 'ICL_LANGUAGE_CODE', 'all' );
65	}
66
67	if ( ! defined( 'ICL_LANGUAGE_NAME' ) ) {
68	define( 'ICL_LANGUAGE_NAME', '' );
69	}
70	}
71	}
72
73	/**
74	* Unlike pll_register_string, icl_register_string stores the string in database
75	* so we need to do the same as some plugins or themes may expect this
76	* we use a serialized option to do this
77	*
78	* @since 1.0.2
79	*
80	* @param string $context The group in which the string is registered.
81	* @param string $name A unique name for the string.
82	* @param string $string The string to register.
83	*/
84	public function register_string( $context, $name, $string ) {
85	// If a string has already been registered with the same name and context, let's replace it.
86	$exist_string = $this->get_string_by_context_and_name( $context, $name );
87	if ( $exist_string && $exist_string !== $string ) {
88	$languages = PLL()->model->get_languages_list();
89
90	// Assign translations of the old string to the new string.
91	foreach ( $languages as $language ) {
92	$mo = new PLL_MO();
93	$mo->import_from_db( $language );
94	$mo->add_entry( $mo->make_entry( $string, $mo->translate( $exist_string ) ) );
95	$mo->export_to_db( $language );
96	}
97	$this->unregister_string( $context, $name );
98	}
99
100	// Registers the string if it does not exist yet (multiline as in WPML).
101	$to_register = array( 'context' => $context, 'name' => $name, 'string' => $string, 'multiline' => true, 'icl' => true );
102	if ( ! in_array( $to_register, self::$strings ) && $to_register['string'] ) {
103	self::$strings[] = $to_register;
104	update_option( 'polylang_wpml_strings', self::$strings );
105	}
106	}
107
108	/**
109	* Removes a string from the registered strings list
110	*
111	* @since 1.0.2
112	*
113	* @param string $context the group in which the string is registered, defaults to 'polylang'
114	* @param string $name a unique name for the string
115	*/
116	public function unregister_string( $context, $name ) {
117	foreach ( self::$strings as $key => $string ) {
118	if ( $string['context'] == $context && $string['name'] == $name ) {
119	unset( self::$strings[ $key ] );
120	update_option( 'polylang_wpml_strings', self::$strings );
121	}
122	}
123	}
124
125	/**
126	* Adds strings registered by icl_register_string to those registered by pll_register_string
127	*
128	* @since 1.0.2
129	*
130	* @param array $strings existing registered strings
131	* @return array registered strings with added strings through WPML API
132	*/
133	public function get_strings( $strings ) {
134	return empty( self::$strings ) ? $strings : array_merge( $strings, self::$strings );
135	}
136
137	/**
138	* Get a registered string by its context and name
139	*
140	* @since 2.0
141	*
142	* @param string $context the group in which the string is registered
143	* @param string $name a unique name for the string
144	* @return bool\|string the registered string, false if none was found
145	*/
146	public function get_string_by_context_and_name( $context, $name ) {
147	foreach ( self::$strings as $string ) {
148	if ( $string['context'] == $context && $string['name'] == $name ) {
149	return $string['string'];
150	}
151	}
152	return false;
153	}
154	}
155