name : frontend-auto-translate.php <?php /** * Auto translates the posts and terms ids * Useful for example for themes querying a specific cat * * @since 1.1 */ class PLL_Frontend_Auto_Translate { public $model, $curlang; /** * Constructor * * @since 1.1 * * @param object $polylang */ public function __construct( &$polylang ) { $this->model = &$polylang->model; $this->curlang = &$polylang->curlang; add_action( 'pre_get_posts', array( $this, 'pre_get_posts' ) ); // after main Polylang filter add_filter( 'get_terms_args', array( $this, 'get_terms_args' ), 20, 2 ); } /** * Helper function to get the translated post in the current language * * @since 1.8 * * @param int $post_id * @return int */ protected function get_post( $post_id ) { return $this->model->post->get( $post_id, $this->curlang ); } /** * Helper function to get the translated term in the current language * * @since 1.8 * * @param int $term_id * @return int */ protected function get_term( $term_id ) { return $this->model->term->get( $term_id, $this->curlang ); } /** * Filters posts query to automatically translate included ids * * @since 1.1 * * @param object $query WP_Query object */ public function pre_get_posts( $query ) { global $wpdb; $qv = &$query->query_vars; if ( $query->is_main_query() || isset( $qv['lang'] ) || ( ! empty( $qv['post_type'] ) && ! $this->model->is_translated_post_type( $qv['post_type'] ) ) ) { return; } // /!\ always keep untranslated as is // Term ids separated by a comma $arr = array(); if ( ! empty( $qv['cat'] ) ) { foreach ( explode( ',', $qv['cat'] ) as $cat ) { $tr = $this->get_term( abs( $cat ) ); $arr[] = $cat < 0 ? -$tr : $tr; } $qv['cat'] = implode( ',', $arr ); } // Category_name $arr = array(); if ( ! empty( $qv['category_name'] ) ) { foreach ( explode( ',', $qv['category_name'] ) as $slug ) { $arr[] = $this->get_translated_term_by( 'slug', $slug, 'category' ); } $qv['category_name'] = implode( ',', $arr ); } // Array of term ids foreach ( array( 'category__and', 'category__in', 'category__not_in', 'tag__and', 'tag__in', 'tag__not_in' ) as $key ) { $arr = array(); if ( ! empty( $qv[ $key ] ) ) { foreach ( $qv[ $key ] as $cat ) { $arr[] = ( $tr = $this->get_term( $cat ) ) ? $tr : $cat; } $qv[ $key ] = $arr; } } // Tag $arr = array(); if ( ! empty( $qv['tag'] ) ) { $sep = strpos( $qv['tag'], ',' ) !== false ? ',' : '+'; // Two possible separators for tag slugs foreach ( explode( $sep, $qv['tag'] ) as $slug ) { $arr[] = $this->get_translated_term_by( 'slug', $slug, 'post_tag' ); } $qv['tag'] = implode( $sep, $arr ); } // tag_id can only take one id if ( ! empty( $qv['tag_id'] ) && $tr_id = $this->get_term( $qv['tag_id'] ) ) { $qv['tag_id'] = $tr_id; } // Array of tag slugs foreach ( array( 'tag_slug__and', 'tag_slug__in' ) as $key ) { $arr = array(); if ( ! empty( $qv[ $key ] ) ) { foreach ( $qv[ $key ] as $slug ) { $arr[] = $this->get_translated_term_by( 'slug', $slug, 'post_tag' ); } $qv[ $key ] = $arr; } } // Custom taxonomies // According to the codex, this type of query is deprecated as of WP 3.1 but it does not appear in WP 3.5 source code foreach ( array_intersect( $this->model->get_translated_taxonomies(), get_taxonomies( array( '_builtin' => false ) ) ) as $taxonomy ) { $tax = get_taxonomy( $taxonomy ); $arr = array(); if ( ! empty( $qv[ $tax->query_var ] ) ) { $sep = strpos( $qv[ $tax->query_var ], ',' ) !== false ? ',' : '+'; // Two possible separators foreach ( explode( $sep, $qv[ $tax->query_var ] ) as $slug ) { $arr[] = $this->get_translated_term_by( 'slug', $slug, $taxonomy ); } $qv[ $tax->query_var ] = implode( $sep, $arr ); } } // Tax_query since WP 3.1 if ( ! empty( $qv['tax_query'] ) && is_array( $qv['tax_query'] ) ) { $qv['tax_query'] = $this->translate_tax_query_recursive( $qv['tax_query'] ); } // p, page_id, post_parent can only take one id foreach ( array( 'p', 'page_id', 'post_parent' ) as $key ) { if ( ! empty( $qv[ $key ] ) && $tr_id = $this->get_post( $qv[ $key ] ) ) { $qv[ $key ] = $tr_id; } } // name, can only take one slug if ( ! empty( $qv['name'] ) ) { if ( empty( $qv['post_type'] ) ) { $post_types = array( 'post' ); } elseif ( 'any' === $qv['post_type'] ) { $post_types = get_post_types( array( 'exclude_from_search' => false ) ); // May return a empty array } else { $post_types = (array) $qv['post_type']; } if ( ! empty( $post_types ) ) { // No function to get post by name except get_posts itself $id = $wpdb->get_var( sprintf( "SELECT ID from {$wpdb->posts} WHERE {$wpdb->posts}.post_type IN ( '%s' ) AND post_name='%s'", implode( "', '", esc_sql( $post_types ) ), esc_sql( $qv['name'] ) ) ); $qv['name'] = ( $id && ( $tr_id = $this->get_post( $id ) ) && $tr = get_post( $tr_id ) ) ? $tr->post_name : $qv['name']; } } // pagename, the page id is already available in queried_object_id if ( ! empty( $qv['pagename'] ) && ! empty( $query->queried_object_id ) && $tr_id = $this->get_post( $query->queried_object_id ) ) { $query->queried_object_id = $tr_id; $qv['pagename'] = get_page_uri( $tr_id ); } // Array of post ids // post_parent__in & post_parent__not_in since WP 3.6 foreach ( array( 'post__in', 'post__not_in', 'post_parent__in', 'post_parent__not_in' ) as $key ) { $arr = array(); if ( ! empty( $qv[ $key ] ) ) { // post__in used by the 2 functions below // Useless to filter them as output is already in the right language and would result in performance loss foreach ( debug_backtrace() as $trace ) { // phpcs:ignore WordPress.PHP.DevelopmentFunctions if ( in_array( $trace['function'], array( 'wp_nav_menu', 'gallery_shortcode' ) ) ) { return; } } foreach ( $qv[ $key ] as $p ) { $arr[] = ( $tr = $this->get_post( $p ) ) ? $tr : $p; } $qv[ $key ] = $arr; } } } /** * Filters terms query to automatically translate included ids * * @since 1.1.1 * * @param array $args * @param array $taxonomies * @return array modified $args */ public function get_terms_args( $args, $taxonomies ) { if ( ! isset( $args['lang'] ) && ! empty( $args['include'] ) && ( empty( $taxonomies ) || $this->model->is_translated_taxonomy( $taxonomies ) ) ) { foreach ( wp_parse_id_list( $args['include'] ) as $id ) { $arr[] = ( $tr = $this->get_term( $id ) ) ? $tr : $id; } $args['include'] = $arr; } return $args; } /** * Translates tax queries * Compatible with nested tax queries introduced in WP 4.1 * * @since 1.7 * * @param array $tax_queries * @return array translated tax queries */ protected function translate_tax_query_recursive( $tax_queries ) { foreach ( $tax_queries as $key => $q ) { if ( isset( $q['taxonomy'], $q['terms'] ) && $this->model->is_translated_taxonomy( $q['taxonomy'] ) ) { $arr = array(); $field = isset( $q['field'] ) && in_array( $q['field'], array( 'slug', 'name' ) ) ? $q['field'] : 'term_id'; foreach ( (array) $q['terms'] as $t ) { $arr[] = $this->get_translated_term_by( $field, $t, $q['taxonomy'] ); } $tax_queries[ $key ]['terms'] = $arr; } // Nested queries elseif ( is_array( $q ) ) { $tax_queries[ $key ] = $this->translate_tax_query_recursive( $q ); } } return $tax_queries; } /** * Translates a term given one field. * * @since 2.3.3 * * @param string $field Either 'slug', 'name', 'term_id', or 'term_taxonomy_id' * @param string|int $term Search for this term value * @param string $taxonomy Taxonomy name. * @return string|int Translated term slug, name, term_id or term_taxonomy_id */ protected function get_translated_term_by( $field, $term, $taxonomy ) { if ( 'term_id' === $field ) { if ( $tr_id = $this->get_term( $term ) ) { return $tr_id; } } else { $terms = get_terms( $taxonomy, array( $field => $term, 'lang' => '' ) ); if ( ! empty( $terms ) && ! is_wp_error( $terms ) ) { $t = reset( $terms ); $tr_id = $this->get_term( $t->term_id ); if ( ! is_wp_error( $tr = get_term( $tr_id, $taxonomy ) ) ) { return $tr->$field; } } } return $term; } }