polylang / include / translated-term.php

translated-term.php in Polylang 2.6.2, at include/translated-term.php

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1	<?php
2
3	/**
4	* Setups the taxonomies languages and translations model
5	*
6	* @since 1.8
7	*/
8	class PLL_Translated_Term extends PLL_Translated_Object {
9
10	/**
11	* Constructor
12	*
13	* @since 1.8
14	*
15	* @param object $model
16	*/
17	public function __construct( &$model ) {
18	$this->object_type = 'term'; // For taxonomies
19	$this->type = 'term'; // For capabilities
20	$this->tax_language = 'term_language';
21	$this->tax_translations = 'term_translations';
22	$this->tax_tt = 'tl_term_taxonomy_id';
23
24	parent::__construct( $model );
25
26	// Filters to prime terms cache
27	add_filter( 'get_terms', array( $this, '_prime_terms_cache' ), 10, 2 );
28	add_filter( 'wp_get_object_terms', array( $this, 'wp_get_object_terms' ), 10, 3 );
29
30	add_action( 'clean_term_cache', array( $this, 'clean_term_cache' ) );
31	}
32
33	/**
34	* Stores the term language in the database
35	*
36	* @since 0.6
37	*
38	* @param int $term_id term id
39	* @param int\|string\|object $lang language ( term_id or slug or object )
40	*/
41	public function set_language( $term_id, $lang ) {
42	$term_id = (int) $term_id;
43
44	$old_lang = $this->get_language( $term_id );
45	$old_lang = $old_lang ? $old_lang->tl_term_id : '';
46	$lang = $lang ? $this->model->get_language( $lang )->tl_term_id : '';
47
48	if ( $old_lang !== $lang ) {
49	wp_set_object_terms( $term_id, $lang, 'term_language' );
50
51	// Add translation group for correct WXR export
52	$translations = $this->get_translations( $term_id );
53	if ( $slug = array_search( $term_id, $translations ) ) {
54	unset( $translations[ $slug ] );
55	}
56
57	$this->save_translations( $term_id, $translations );
58	}
59	}
60
61	/**
62	* Removes the term language in database
63	*
64	* @since 0.5
65	*
66	* @param int $term_id term id
67	*/
68	public function delete_language( $term_id ) {
69	wp_delete_object_term_relationships( $term_id, 'term_language' );
70	}
71
72	/**
73	* Returns the language of a term
74	*
75	* @since 0.1
76	*
77	* @param int\|string $value term id or term slug
78	* @param string $taxonomy optional taxonomy needed when the term slug is passed as first parameter
79	* @return bool\|object PLL_Language object, false if no language is associated to that term
80	*/
81	public function get_language( $value, $taxonomy = '' ) {
82	if ( is_numeric( $value ) ) {
83	$term_id = $value;
84	}
85
86	// get_term_by still not cached in WP 3.5.1 but internally, the function is always called by term_id
87	elseif ( is_string( $value ) && $taxonomy ) {
88	$term_id = wpcom_vip_get_term_by( 'slug', $value, $taxonomy )->term_id;
89	}
90
91	// Get the language and make sure it is a PLL_Language object
92	return isset( $term_id ) && ( $lang = $this->get_object_term( $term_id, 'term_language' ) ) ? $this->model->get_language( $lang->term_id ) : false;
93	}
94
95	/**
96	* Tells whether a translation term must updated
97	*
98	* @since 2.3
99	*
100	* @param array $id Post id or term id
101	* @param array $translations An associative array of translations with language code as key and translation id as value
102	*/
103	protected function should_update_translation_group( $id, $translations ) {
104	// Don't do anything if no translations have been added to the group
105	$old_translations = $this->get_translations( $id );
106	if ( count( $translations ) > 1 && count( array_diff_assoc( $translations, $old_translations ) ) > 0 ) {
107	return true;
108	}
109
110	// But we need a translation group for terms to allow relationships remap when importing from a WXR file
111	$term = $this->get_object_term( $id, $this->tax_translations );
112	return empty( $term ) \|\| count( array_diff_assoc( $translations, $old_translations ) );
113	}
114
115	/**
116	* Deletes a translation
117	*
118	* @since 0.5
119	*
120	* @param int $id term id
121	*/
122	public function delete_translation( $id ) {
123	global $wpdb;
124	$slug = array_search( $id, $this->get_translations( $id ) ); // in case some plugin stores the same value with different key
125
126	parent::delete_translation( $id );
127	wp_delete_object_term_relationships( $id, 'term_translations' );
128
129	if ( ! doing_action( 'pre_delete_term' ) && $wpdb->get_var( $wpdb->prepare( "SELECT COUNT( * ) FROM $wpdb->terms WHERE term_id = %d;", $id ) ) ) {
130	// Always keep a group for terms to allow relationships remap when importing from a WXR file
131	$translations[ $slug ] = $id;
132	wp_insert_term( $group = uniqid( 'pll_' ), 'term_translations', array( 'description' => maybe_serialize( $translations ) ) );
133	wp_set_object_terms( $id, $group, 'term_translations' );
134	}
135	}
136
137	/**
138	* A join clause to add to sql queries when filtering by language is needed directly in query
139	*
140	* @since 1.2
141	* @since 2.6 The `$alias` parameter was added.
142	*
143	* @param string $alias Alias for $wpdb->terms table
144	* @return string join clause
145	*/
146	public function join_clause( $alias = 't' ) {
147	global $wpdb;
148	return " INNER JOIN $wpdb->term_relationships AS pll_tr ON pll_tr.object_id = $alias.term_id";
149	}
150
151	/**
152	* Cache language and translations when terms are queried by get_terms
153	*
154	* @since 1.2
155	*
156	* @param array $terms queried terms
157	* @param array $taxonomies queried taxonomies
158	* @return array unmodified $terms
159	*/
160	public function _prime_terms_cache( $terms, $taxonomies ) {
161	if ( is_array( $terms ) && $this->model->is_translated_taxonomy( $taxonomies ) ) {
162	foreach ( $terms as $term ) {
163	$term_ids[] = is_object( $term ) ? $term->term_id : (int) $term;
164	}
165	}
166
167	if ( ! empty( $term_ids ) ) {
168	update_object_term_cache( array_unique( $term_ids ), 'term' ); // Adds language and translation of terms to cache
169	}
170	return $terms;
171	}
172
173	/**
174	* When terms are found for posts, add their language and translations to cache
175	*
176	* @since 1.2
177	*
178	* @param array $terms terms found
179	* @param array $object_ids not used
180	* @param array $taxonomies terms taxonomies
181	* @return array unmodified $terms
182	*/
183	public function wp_get_object_terms( $terms, $object_ids, $taxonomies ) {
184	$taxonomies = explode( "', '", trim( $taxonomies, "'" ) );
185	if ( ! in_array( 'term_translations', $taxonomies ) ) {
186	$this->_prime_terms_cache( $terms, $taxonomies );
187	}
188	return $terms;
189	}
190
191	/**
192	* When the term cache is cleaned, clean the object term cache too
193	*
194	* @since 2.0
195	*
196	* @param array $ids An array of term IDs.
197	*/
198	public function clean_term_cache( $ids ) {
199	clean_object_term_cache( $ids, 'term' );
200	}
201	}
202