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<?php |
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|
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/** |
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* Setups the objects languages and translations model |
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* |
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* @since 1.8 |
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*/ |
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abstract class PLL_Translated_Object { |
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public $model; |
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protected $object_type, $tax_language, $tax_translations, $tax_tt; |
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|
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/** |
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* Constructor |
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* |
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* @since 1.8 |
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* |
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* @param object $model |
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*/ |
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public function __construct( &$model ) { |
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$this->model = &$model; |
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|
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// register our taxonomies as soon as possible |
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// this is early registration, not ready for rewrite rules as wp_rewrite will be setup later |
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$args = array( 'label' => false, 'public' => false, 'query_var' => false, 'rewrite' => false, '_pll' => true ); |
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register_taxonomy( $this->tax_language, $this->object_type, $args ); |
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$args['update_count_callback'] = '_update_generic_term_count'; // count *all* posts to avoid deleting in clean_translations_terms |
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register_taxonomy( $this->tax_translations, $this->object_type, $args ); |
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} |
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|
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/** |
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* Wrap wp_get_object_terms to cache it and return only one object |
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* inspired by the function get_the_terms |
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* |
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* @since 1.2 |
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* |
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* @param int $object_id post_id or term_id |
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* @param string $taxonomy Polylang taxonomy depending if we are looking for a post ( or term ) language ( or translation ) |
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* @return bool|object the term associated to the object in the requested taxonomy if exists, false otherwise |
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*/ |
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public function get_object_term( $object_id, $taxonomy ) { |
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if ( empty( $object_id ) ) { |
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return false; |
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} |
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|
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$object_id = (int) $object_id; |
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$term = get_object_term_cache( $object_id, $taxonomy ); |
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|
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if ( false === $term ) { |
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// query language and translations at the same time |
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$taxonomies = array( $this->tax_language, $this->tax_translations ); |
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|
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// query terms |
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foreach ( wp_get_object_terms( $object_id, $taxonomies ) as $t ) { |
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$terms[ $t->taxonomy ] = $t; |
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if ( $t->taxonomy == $taxonomy ) { |
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$term = $t; |
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} |
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} |
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|
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// store it the way WP wants it |
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// set an empty cache if no term found in the taxonomy |
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foreach ( $taxonomies as $tax ) { |
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wp_cache_add( $object_id, empty( $terms[ $tax ] ) ? array() : array( $terms[ $tax ] ), $tax . '_relationships' ); |
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} |
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} |
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else { |
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$term = reset( $term ); |
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} |
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|
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return empty( $term ) ? false : $term; |
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} |
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|
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/** |
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* Tells wether to store a translation term |
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* |
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* @since 1.8 |
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* |
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* @param array $translations an associative array of translations with language code as key and translation id as value |
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*/ |
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protected function keep_translation_group( $translations ) { |
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return count( $translations ) > 1; |
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} |
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|
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/** |
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* Saves translations for posts or terms |
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* |
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* @since 0.5 |
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* |
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* @param int $id post id or term id |
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* @param array $translations an associative array of translations with language code as key and translation id as value |
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*/ |
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public function save_translations( $id, $translations ) { |
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$id = (int) $id; |
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|
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if ( ( $lang = $this->get_language( $id ) ) && isset( $translations ) && is_array( $translations ) ) { |
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// sanitize the translations array |
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$translations = array_map( 'intval', $translations ); |
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$translations = array_merge( array( $lang->slug => $id ), $translations ); // make sure this object is in translations |
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$translations = array_diff( $translations, array( 0 ) ); // don't keep non translated languages |
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$translations = array_intersect_key( $translations, array_flip( $this->model->get_languages_list( array( 'fields' => 'slug' ) ) ) ); // keep only valid languages slugs as keys |
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|
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// unlink removed translations |
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$old_translations = $this->get_translations( $id ); |
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foreach ( array_diff_assoc( $old_translations, $translations ) as $object_id ) { |
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$this->delete_translation( $object_id ); |
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} |
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|
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// don't create a translation group for untranslated posts as it is useless |
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// but we need one for terms to allow relationships remap when importing from a WXR file |
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if ( $this->keep_translation_group( $translations ) ) { |
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$terms = wp_get_object_terms( $translations, $this->tax_translations ); |
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$term = reset( $terms ); |
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|
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// create a new term if necessary |
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if ( empty( $term ) ) { |
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wp_insert_term( $group = uniqid( 'pll_' ), $this->tax_translations, array( 'description' => serialize( $translations ) ) ); |
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} |
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else { |
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// take care not to overwrite extra data stored in description field, if any |
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$d = unserialize( $term->description ); |
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$d = is_array( $d ) ? array_diff_key( $d, $old_translations ) : array(); // remove old translations |
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$d = array_merge( $d, $translations ); // add new one |
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wp_update_term( $group = (int) $term->term_id, $this->tax_translations, array( 'description' => serialize( $d ) ) ); |
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} |
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|
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// link all translations to the new term |
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foreach ( $translations as $p ) { |
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wp_set_object_terms( $p, $group, $this->tax_translations ); |
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} |
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|
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// clean now unused translation groups |
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foreach ( wp_list_pluck( $terms, 'term_id' ) as $term_id ) { |
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$term = get_term( $term_id, $this->tax_translations ); |
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if ( empty( $term->count ) ) { |
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wp_delete_term( $term_id, $this->tax_translations ); |
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} |
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} |
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} |
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} |
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} |
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|
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/** |
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* Deletes a translation of a post or term |
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* |
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* @since 0.5 |
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* |
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* @param int $id post id or term id |
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*/ |
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public function delete_translation( $id ) { |
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$id = (int) $id; |
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$term = $this->get_object_term( $id, $this->tax_translations ); |
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|
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if ( ! empty( $term ) ) { |
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$d = unserialize( $term->description ); |
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$slug = array_search( $id, $this->get_translations( $id ) ); // in case some plugin stores the same value with different key |
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unset( $d[ $slug ] ); |
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|
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if ( empty( $d ) ) { |
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wp_delete_term( (int) $term->term_id, $this->tax_translations ); |
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} |
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else { |
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wp_update_term( (int) $term->term_id, $this->tax_translations, array( 'description' => serialize( $d ) ) ); |
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} |
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} |
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} |
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|
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/** |
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* Returns an array of translations of a post or term |
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* |
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* @since 0.5 |
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* |
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* @param int $id post id or term id |
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* @return array an associative array of translations with language code as key and translation id as value |
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*/ |
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public function get_translations( $id ) { |
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$term = $this->get_object_term( $id, $this->tax_translations ); |
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$translations = empty( $term ) ? array() : unserialize( $term->description ); |
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|
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// make sure we return only translations ( thus we allow plugins to store other informations in the array ) |
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if ( is_array( $translations ) ) { |
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$translations = array_intersect_key( $translations, array_flip( $this->model->get_languages_list( array( 'fields' => 'slug' ) ) ) ); |
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} |
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|
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// make sure to return at least the passed post or term in its translation array |
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if ( empty( $translations ) && $lang = $this->get_language( $id ) ) { |
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$translations = array( $lang->slug => $id ); |
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} |
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|
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return $translations; |
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} |
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|
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/** |
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* Returns the id of the translation of a post or term |
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* |
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* @since 0.5 |
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* |
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* @param int $id post id or term id |
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* @param object|string $lang object or slug |
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* @return bool|int post id or term id of the translation, false if there is none |
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*/ |
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public function get_translation( $id, $lang ) { |
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if ( ! $lang = $this->model->get_language( $lang ) ) { |
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return false; |
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} |
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|
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$translations = $this->get_translations( $id ); |
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|
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return isset( $translations[ $lang->slug ] ) ? $translations[ $lang->slug ] : false; |
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} |
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|
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/** |
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* Among the object and its translations, returns the id of the object which is in $lang |
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* |
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* @since 0.1 |
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* |
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* @param int $id post id or term id |
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* @param int|string|object $lang language ( term_id or slug or object ) |
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* @return bool|int the translation post id or term id if exists, otherwise the post id or term id, false if the post has no language |
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*/ |
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public function get( $id, $lang ) { |
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$obj_lang = $this->get_language( $id ); // FIXME is this necessary? |
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if ( ! $lang || ! $obj_lang ) { |
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return false; |
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} |
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|
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$lang = $this->model->get_language( $lang ); |
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return $obj_lang->term_id == $lang->term_id ? $id : $this->get_translation( $id, $lang ); |
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} |
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|
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/** |
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* A where clause to add to sql queries when filtering by language is needed directly in query |
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* |
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* @since 1.2 |
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* |
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* @param object|array|string $lang a PLL_Language object or a comma separated list of languag slug or an array of language slugs |
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* @return string where clause |
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*/ |
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public function where_clause( $lang ) { |
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global $wpdb; |
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$tt_id = $this->tax_tt; |
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|
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// $lang is an object |
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// generally the case if the query is coming from Polylang |
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if ( is_object( $lang ) ) { |
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return $wpdb->prepare( ' AND pll_tr.term_taxonomy_id = %d', $lang->$tt_id ); |
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} |
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|
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// $lang is a comma separated list of slugs ( or an array of slugs ) |
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// generally the case is the query is coming from outside with 'lang' parameter |
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$slugs = is_array( $lang ) ? $lang : explode( ',', $lang ); |
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foreach ( $slugs as $slug ) { |
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$languages[] = (int) $this->model->get_language( $slug )->$tt_id; |
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} |
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|
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return ' AND pll_tr.term_taxonomy_id IN ( ' . implode( ',', $languages ) . ' )'; |
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} |
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|
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/** |
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* Returns ids of objects in a language similarly to get_objects_in_term for a taxonomy |
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* faster than get_objects_in_term as it avoids a JOIN |
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* |
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* @since 1.4 |
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* |
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* @param object $lang a PLL_Language object |
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* @return array |
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*/ |
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public function get_objects_in_language( $lang ) { |
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global $wpdb; |
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$tt_id = $this->tax_tt; |
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return $wpdb->get_col( $wpdb->prepare( "SELECT object_id FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $lang->$tt_id ) ); |
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} |
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} |
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|
