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