polylang / include / translated-term.php

translated-term.php in Polylang 2.1, 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';
19	$this->tax_language = 'term_language';
20	$this->tax_translations = 'term_translations';
21	$this->tax_tt = 'tl_term_taxonomy_id';
22
23	parent::__construct( $model );
24
25	// filters to prime terms cache
26	add_filter( 'get_terms', array( $this, '_prime_terms_cache' ), 10, 2 );
27	add_filter( 'wp_get_object_terms', array( $this, 'wp_get_object_terms' ), 10, 3 );
28
29	add_action( 'clean_term_cache', array( $this, 'clean_term_cache' ) );
30	}
31
32	/**
33	* Stores the term language in the database
34	*
35	* @since 0.6
36	*
37	* @param int $term_id term id
38	* @param int\|string\|object $lang language ( term_id or slug or object )
39	*/
40	public function set_language( $term_id, $lang ) {
41	$term_id = (int) $term_id;
42	wp_set_object_terms( $term_id, $lang ? $this->model->get_language( $lang )->tl_term_id : '', 'term_language' );
43
44	// add translation group for correct WXR export
45	$translations = $this->get_translations( $term_id );
46	if ( $slug = array_search( $term_id, $translations ) ) {
47	unset( $translations[ $slug ] );
48	}
49
50	$this->save_translations( $term_id, $translations );
51	}
52
53	/**
54	* Removes the term language in database
55	*
56	* @since 0.5
57	*
58	* @param int $term_id term id
59	*/
60	public function delete_language( $term_id ) {
61	wp_delete_object_term_relationships( $term_id, 'term_language' );
62	}
63
64	/**
65	* Returns the language of a term
66	*
67	* @since 0.1
68	*
69	* @param int\|string $value term id or term slug
70	* @param string $taxonomy optional taxonomy needed when the term slug is passed as first parameter
71	* @return bool\|object PLL_Language object, false if no language is associated to that term
72	*/
73	public function get_language( $value, $taxonomy = '' ) {
74	if ( is_numeric( $value ) ) {
75	$term_id = $value;
76	}
77
78	// get_term_by still not cached in WP 3.5.1 but internally, the function is always called by term_id
79	elseif ( is_string( $value ) && $taxonomy ) {
80	$term_id = wpcom_vip_get_term_by( 'slug', $value , $taxonomy )->term_id;
81	}
82
83	// get the language and make sure it is a PLL_Language object
84	return isset( $term_id ) && ( $lang = $this->get_object_term( $term_id, 'term_language' ) ) ? $this->model->get_language( $lang->term_id ) : false;
85	}
86
87	/**
88	* Tells the parent class to always store a translation term
89	*
90	* @since 1.8
91	*
92	* @param array $translations: an associative array of translations with language code as key and translation id as value
93	*/
94	protected function keep_translation_group( $translations ) {
95	return true;
96	}
97
98	/**
99	* Deletes a translation
100	*
101	* @since 0.5
102	*
103	* @param int $id term id
104	*/
105	public function delete_translation( $id ) {
106	global $wpdb;
107	$slug = array_search( $id, $this->get_translations( $id ) ); // in case some plugin stores the same value with different key
108
109	parent::delete_translation( $id );
110
111	if ( $wpdb->get_var( $wpdb->prepare( "SELECT COUNT( * ) FROM $wpdb->terms WHERE term_id = %d;", $id ) ) ) {
112	// always keep a group for terms to allow relationships remap when importing from a WXR file
113	$translations[ $slug ] = $id;
114	wp_insert_term( $group = uniqid( 'pll_' ), 'term_translations', array( 'description' => serialize( $translations ) ) );
115	wp_set_object_terms( $id, $group, 'term_translations' );
116	}
117	}
118
119	/**
120	* A join clause to add to sql queries when filtering by language is needed directly in query
121	*
122	* @since 1.2
123	*
124	* @return string join clause
125	*/
126	public function join_clause() {
127	global $wpdb;
128	return " INNER JOIN $wpdb->term_relationships AS pll_tr ON pll_tr.object_id = t.term_id";
129	}
130
131	/**
132	* Cache language and translations when terms are queried by get_terms
133	*
134	* @since 1.2
135	*
136	* @param array $terms queried terms
137	* @param array $taxonomies queried taxonomies
138	* @return array unmodified $terms
139	*/
140	public function _prime_terms_cache( $terms, $taxonomies ) {
141	if ( is_array( $terms ) && $this->model->is_translated_taxonomy( $taxonomies ) ) {
142	foreach ( $terms as $term ) {
143	$term_ids[] = is_object( $term ) ? $term->term_id : (int) $term;
144	}
145	}
146
147	if ( ! empty( $term_ids ) ) {
148	update_object_term_cache( array_unique( $term_ids ), 'term' ); // adds language and translation of terms to cache
149	}
150	return $terms;
151	}
152
153	/**
154	* When terms are found for posts, add their language and translations to cache
155	*
156	* @since 1.2
157	*
158	* @param array $terms terms found
159	* @param array $object_ids not used
160	* @param array $taxonomies terms taxonomies
161	* @return array unmodified $terms
162	*/
163	public function wp_get_object_terms( $terms, $object_ids, $taxonomies ) {
164	$taxonomies = explode( "', '", trim( $taxonomies, "'" ) );
165	if ( ! in_array( 'term_translations', $taxonomies ) ) {
166	$this->_prime_terms_cache( $terms, $taxonomies );
167	}
168	return $terms;
169	}
170
171	/**
172	* When the term cache is cleaned, clean the object term cache too
173	*
174	* @since 2.0
175	*
176	* @param array $ids An array of term IDs.
177	* @param string $taxonomy Taxonomy slug.
178	*/
179	function clean_term_cache( $ids ) {
180	clean_object_term_cache( $ids, 'term' );
181	}
182	}
183