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<?php |
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|
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/** |
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* Setup filters common to admin and frontend |
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* |
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* @since 1.4 |
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*/ |
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class PLL_Filters { |
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public $links_model, $model, $options, $curlang; |
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|
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/** |
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* Constructor: setups filters |
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* |
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* @since 1.4 |
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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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$this->links_model = &$polylang->links_model; |
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$this->model = &$polylang->model; |
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$this->options = &$polylang->options; |
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$this->curlang = &$polylang->curlang; |
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|
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// Filters the comments according to the current language |
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add_action( 'parse_comment_query', array( $this, 'parse_comment_query' ) ); |
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add_filter( 'comments_clauses', array( $this, 'comments_clauses' ), 10, 2 ); |
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|
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// Filters the get_pages function according to the current language |
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add_filter( 'get_pages', array( $this, 'get_pages' ), 10, 2 ); |
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|
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// Rewrites next and previous post links to filter them by language |
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add_filter( 'get_previous_post_join', array( $this, 'posts_join' ), 10, 5 ); |
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add_filter( 'get_next_post_join', array( $this, 'posts_join' ), 10, 5 ); |
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add_filter( 'get_previous_post_where', array( $this, 'posts_where' ), 10, 5 ); |
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add_filter( 'get_next_post_where', array( $this, 'posts_where' ), 10, 5 ); |
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|
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// Converts the locale to a valid W3C locale |
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add_filter( 'language_attributes', array( $this, 'language_attributes' ) ); |
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|
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// Prevents deleting all the translations of the default category |
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add_filter( 'map_meta_cap', array( $this, 'fix_delete_default_category' ), 10, 4 ); |
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|
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// Translate the site title in emails sent to users |
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add_filter( 'password_change_email', array( $this, 'translate_user_email' ) ); |
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add_filter( 'email_change_email', array( $this, 'translate_user_email' ) ); |
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} |
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|
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/** |
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* Get the language to filter a comments query |
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* |
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* @since 2.0 |
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* |
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* @param object $query |
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* @return object|bool the language(s) to use in the filter, false otherwise |
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*/ |
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protected function get_comments_queried_language( $query ) { |
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// Don't filter comments if comment ids or post ids are specified |
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$plucked = wp_array_slice_assoc( $query->query_vars, array( 'comment__in', 'parent', 'post_id', 'post__in', 'post_parent' ) ); |
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$fields = array_filter( $plucked ); |
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if ( ! empty( $fields ) ) { |
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return false; |
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} |
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|
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// Don't filter comments if a non translated post type is specified |
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if ( ! empty( $query->query_vars['post_type'] ) && ! $this->model->is_translated_post_type( $query->query_vars['post_type'] ) ) { |
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return false; |
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} |
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|
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return empty( $query->query_vars['lang'] ) ? $this->curlang : $this->model->get_language( $query->query_vars['lang'] ); |
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} |
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|
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/** |
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* Adds language dependent cache domain when querying comments |
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* Useful as the 'lang' parameter is not included in cache key by WordPress |
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* Needed since WP 4.6 as comments have been added to persistent cache. See #36906, #37419 |
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* |
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* @since 2.0 |
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* |
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* @param object $query |
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*/ |
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public function parse_comment_query( $query ) { |
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if ( $lang = $this->get_comments_queried_language( $query ) ) { |
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$key = '_' . ( is_array( $lang ) ? implode( ',', $lang ) : $this->model->get_language( $lang )->slug ); |
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$query->query_vars['cache_domain'] = empty( $query->query_vars['cache_domain'] ) ? 'pll' . $key : $query->query_vars['cache_domain'] . $key; |
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} |
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} |
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|
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/** |
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* Filters the comments according to the current language |
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* Used by the recent comments widget and admin language filter |
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* |
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* @since 0.2 |
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* |
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* @param array $clauses sql clauses |
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* @param object $query WP_Comment_Query object |
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* @return array modified $clauses |
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*/ |
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public function comments_clauses( $clauses, $query ) { |
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global $wpdb; |
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|
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$lang = $this->get_comments_queried_language( $query ); |
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|
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if ( ! empty( $lang ) ) { |
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// If this clause is not already added by WP |
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if ( ! strpos( $clauses['join'], '.ID' ) ) { |
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$clauses['join'] .= " JOIN $wpdb->posts ON $wpdb->posts.ID = $wpdb->comments.comment_post_ID"; |
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} |
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|
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$clauses['join'] .= $this->model->post->join_clause(); |
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$clauses['where'] .= $this->model->post->where_clause( $lang ); |
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} |
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return $clauses; |
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} |
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|
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/** |
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* Filters get_pages per language |
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* |
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* @since 1.4 |
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* |
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* @param array $pages an array of pages already queried |
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* @param array $args get_pages arguments |
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* @return array modified list of pages |
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*/ |
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public function get_pages( $pages, $args ) { |
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if ( isset( $args['lang'] ) && empty( $args['lang'] ) ) { |
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return $pages; |
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} |
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|
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$language = empty( $args['lang'] ) ? $this->curlang : $this->model->get_language( $args['lang'] ); |
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|
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if ( empty( $language ) || empty( $pages ) || ! $this->model->is_translated_post_type( $args['post_type'] ) ) { |
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return $pages; |
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} |
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|
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static $once = false; |
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|
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// Obliged to redo the get_pages query if we want to get the right number |
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if ( ! empty( $args['number'] ) && ! $once ) { |
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$once = true; // avoid infinite loop |
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|
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$r = array( |
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'lang' => 0, // So this query is not filtered |
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'numberposts' => -1, |
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'nopaging' => true, |
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'post_type' => $args['post_type'], |
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'fields' => 'ids', |
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'tax_query' => array( |
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array( |
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'taxonomy' => 'language', |
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'field' => 'term_taxonomy_id', // Since WP 3.5 |
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'terms' => $language->term_taxonomy_id, |
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'operator' => 'NOT IN', |
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), |
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), |
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); |
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|
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// Take care that 'exclude' argument accepts integer or strings too |
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$args['exclude'] = array_merge( wp_parse_id_list( $args['exclude'] ), get_posts( $r ) ); |
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$pages = get_pages( $args ); |
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} |
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|
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$ids = wp_list_pluck( $pages, 'ID' ); |
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|
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// Filters the queried list of pages by language |
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if ( ! $once ) { |
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$ids = array_intersect( $ids, $this->model->post->get_objects_in_language( $language ) ); |
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|
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foreach ( $pages as $key => $page ) { |
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if ( ! in_array( $page->ID, $ids ) ) { |
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unset( $pages[ $key ] ); |
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} |
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} |
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|
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$pages = array_values( $pages ); // In case 3rd parties suppose the existence of $pages[0] |
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} |
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|
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// Not done by WP but extremely useful for performance when manipulating taxonomies |
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update_object_term_cache( $ids, $args['post_type'] ); |
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|
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$once = false; // In case get_pages is called another time |
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return $pages; |
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} |
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|
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/** |
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* Modifies the sql request for get_adjacent_post to filter by the current language |
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* |
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* @since 0.1 |
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* |
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* @param string $sql The JOIN clause in the SQL. |
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* @param bool $in_same_term Whether post should be in a same taxonomy term. |
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* @param array $excluded_terms Array of excluded term IDs. |
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* @param string $taxonomy Taxonomy. Used to identify the term used when `$in_same_term` is true. |
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* @param WP_Post $post WP_Post object. |
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* @return string modified JOIN clause |
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*/ |
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public function posts_join( $sql, $in_same_term, $excluded_terms, $taxonomy = '', $post = null ) { |
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return $this->model->is_translated_post_type( $post->post_type ) && ! empty( $this->curlang ) ? $sql . $this->model->post->join_clause( 'p' ) : $sql; |
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} |
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|
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/** |
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* Modifies the sql request for wp_get_archives and get_adjacent_post to filter by the current language |
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* |
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* @since 0.1 |
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* |
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* @param string $sql The WHERE clause in the SQL. |
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* @param bool $in_same_term Whether post should be in a same taxonomy term. |
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* @param array $excluded_terms Array of excluded term IDs. |
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* @param string $taxonomy Taxonomy. Used to identify the term used when `$in_same_term` is true. |
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* @param WP_Post $post WP_Post object. |
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* @return string modified WHERE clause |
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*/ |
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public function posts_where( $sql, $in_same_term, $excluded_terms, $taxonomy = '', $post = null ) { |
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return $this->model->is_translated_post_type( $post->post_type ) && ! empty( $this->curlang ) ? $sql . $this->model->post->where_clause( $this->curlang ) : $sql; |
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} |
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|
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/** |
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* Converts WordPress locale to valid W3 locale in html language attributes |
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* |
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* @since 1.8 |
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* |
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* @param string $output language attributes |
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* @return string |
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*/ |
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public function language_attributes( $output ) { |
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if ( $language = $this->model->get_language( get_locale() ) ) { |
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$output = str_replace( '"' . get_bloginfo( 'language' ) . '"', '"' . $language->get_locale( 'display' ) . '"', $output ); |
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} |
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return $output; |
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} |
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|
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|
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/** |
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* Prevents deleting all the translations of the default category |
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* |
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* @since 2.1 |
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* |
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* @param array $caps The user's actual capabilities. |
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* @param string $cap Capability name. |
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* @param int $user_id The user ID. |
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* @param array $args Adds the context to the cap. The category id. |
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* @return array |
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*/ |
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public function fix_delete_default_category( $caps, $cap, $user_id, $args ) { |
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if ( 'delete_term' === $cap ) { |
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$term = get_term( reset( $args ) ); // Since WP 4.4, we can get the term to get the taxonomy |
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if ( $term instanceof WP_Term ) { |
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$default_cat = get_option( 'default_' . $term->taxonomy ); |
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if ( $default_cat && array_intersect( $args, $this->model->term->get_translations( $default_cat ) ) ) { |
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$caps[] = 'do_not_allow'; |
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} |
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} |
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} |
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|
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return $caps; |
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} |
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|
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/** |
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* Translates the site title in emails sent to the user (change email, reset password) |
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* It is necessary to filter the email because WP evaluates the site title before calling switch_to_locale() |
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* |
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* @since 2.1.3 |
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* |
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* @param array $email |
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* @return array |
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*/ |
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function translate_user_email( $email ) { |
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$blog_name = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES ); |
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$email['subject'] = sprintf( $email['subject'], $blog_name ); |
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$email['message'] = str_replace( '###SITENAME###', $blog_name, $email['message'] ); |
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return $email; |
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} |
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} |
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|
