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<?php |
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/** |
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* @package Polylang |
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*/ |
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|
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/** |
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* Manages links filters and url of translations on frontend |
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* |
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* @since 1.2 |
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*/ |
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class PLL_Frontend_Links extends PLL_Links { |
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|
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/** |
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* Internal non persistent cache object. |
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* |
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* @var PLL_Cache<string> |
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*/ |
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public $cache; |
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|
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/** |
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* Constructor |
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* |
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* @since 1.2 |
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* |
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* @param PLL_Frontend $polylang The Polylang object. |
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*/ |
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public function __construct( &$polylang ) { |
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parent::__construct( $polylang ); |
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|
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$this->curlang = &$polylang->curlang; |
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$this->cache = new PLL_Cache(); |
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} |
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|
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/** |
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* Returns the url of the translation (if it exists) of the current page. |
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* |
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* @since 0.1 |
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* |
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* @param PLL_Language $language Language object. |
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* @return string |
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*/ |
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public function get_translation_url( $language ) { |
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global $wp_query; |
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|
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if ( false !== $translation_url = $this->cache->get( 'translation_url:' . $language->slug ) ) { |
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return $translation_url; |
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} |
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|
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// Make sure that we have the queried object |
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// See https://wordpress.org/support/topic/patch-for-fixing-a-notice |
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$queried_object_id = $wp_query->get_queried_object_id(); |
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|
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/** |
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* Filters the translation url before Polylang attempts to find one. |
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* Internally used by Polylang for the static front page and posts page. |
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* |
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* @since 1.8 |
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* |
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* @param string $url Empty string or the url of the translation of the current page. |
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* @param PLL_Language $language Language of the translation. |
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* @param int $queried_object_id Queried object ID. |
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*/ |
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if ( ! $url = apply_filters( 'pll_pre_translation_url', '', $language, $queried_object_id ) ) { |
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$qv = $wp_query->query_vars; |
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|
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// Post and attachment |
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if ( is_single() && ( $this->options['media_support'] || ! is_attachment() ) && ( $id = $this->model->post->get( $queried_object_id, $language ) ) && $this->model->post->current_user_can_read( $id ) ) { |
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$url = get_permalink( $id ); |
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} |
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|
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// Page |
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elseif ( is_page() && ( $id = $this->model->post->get( $queried_object_id, $language ) ) && $this->model->post->current_user_can_read( $id ) ) { |
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$url = get_page_link( $id ); |
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} |
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|
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elseif ( is_search() ) { |
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$url = $this->get_archive_url( $language ); |
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|
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// Special case for search filtered by translated taxonomies: taxonomy terms are translated in the translation url |
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if ( ! empty( $wp_query->tax_query->queries ) ) { |
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foreach ( $wp_query->tax_query->queries as $tax_query ) { |
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if ( ! empty( $tax_query['taxonomy'] ) && $this->model->is_translated_taxonomy( $tax_query['taxonomy'] ) ) { |
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|
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$tax = get_taxonomy( $tax_query['taxonomy'] ); |
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$terms = get_terms( array( 'taxonomy' => $tax->name, 'fields' => 'id=>slug' ) ); // Filtered by current language |
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|
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foreach ( $tax_query['terms'] as $slug ) { |
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$term_id = array_search( $slug, $terms ); // What is the term_id corresponding to taxonomy term? |
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if ( $term_id && $term_id = $this->model->term->get_translation( $term_id, $language ) ) { // Get the translated term_id |
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$term = get_term( $term_id, $tax->name ); |
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|
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if ( ! $term instanceof WP_Term ) { |
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continue; |
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} |
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|
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$url = str_replace( $slug, $term->slug, $url ); |
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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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// Translated taxonomy |
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// Take care that is_tax() is false for categories and tags |
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elseif ( ( is_category() || is_tag() || is_tax() ) && ( $term = get_queried_object() ) && $this->model->is_translated_taxonomy( $term->taxonomy ) ) { |
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$lang = $this->model->term->get_language( $term->term_id ); |
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|
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if ( ! $lang || $language->slug == $lang->slug ) { |
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$url = get_term_link( $term, $term->taxonomy ); // Self link |
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} |
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|
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elseif ( $tr_id = $this->model->term->get_translation( $term->term_id, $language ) ) { |
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$tr_term = get_term( $tr_id, $term->taxonomy ); |
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if ( $tr_term instanceof WP_Term ) { |
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// Check if translated term ( or children ) have posts |
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$count = $tr_term->count || ( is_taxonomy_hierarchical( $term->taxonomy ) && array_sum( wp_list_pluck( get_terms( array( 'taxonomy' => $term->taxonomy, 'child_of' => $tr_term->term_id, 'lang' => $language->slug ) ), 'count' ) ) ); |
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|
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/** |
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* Filter whether to hide an archive translation url |
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* |
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* @since 2.2.4 |
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* |
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* @param bool $hide True to hide the translation url. |
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* defaults to true when the translated archive is empty, false otherwise. |
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* @param string $lang The language code of the translation |
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* @param array $args Arguments used to evaluated the number of posts in the archive |
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*/ |
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if ( ! apply_filters( 'pll_hide_archive_translation_url', ! $count, $language->slug, array( 'taxonomy' => $term->taxonomy ) ) ) { |
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$url = get_term_link( $tr_term, $term->taxonomy ); |
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} |
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} |
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} |
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} |
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|
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// Post type archive |
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elseif ( is_post_type_archive() ) { |
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if ( $this->model->is_translated_post_type( $qv['post_type'] ) ) { |
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$args = array( 'post_type' => $qv['post_type'] ); |
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$count = $this->model->count_posts( $language, $args ); |
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|
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/** This filter is documented in src/frontend/frontend-links.php */ |
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if ( ! apply_filters( 'pll_hide_archive_translation_url', ! $count, $language->slug, $args ) ) { |
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$url = $this->get_archive_url( $language ); |
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} |
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} |
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} |
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|
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// Other archives |
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elseif ( is_archive() ) { |
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$keys = array( 'post_type', 'm', 'year', 'monthnum', 'day', 'author', 'author_name' ); |
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$keys = array_merge( $keys, $this->model->get_filtered_taxonomies_query_vars() ); |
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$args = array_intersect_key( $qv, array_flip( $keys ) ); |
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$count = $this->model->count_posts( $language, $args ); |
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|
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/** This filter is documented in src/frontend/frontend-links.php */ |
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if ( ! apply_filters( 'pll_hide_archive_translation_url', ! $count, $language->slug, $args ) ) { |
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$url = $this->get_archive_url( $language ); |
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} |
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} |
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|
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// Front page when it is the list of posts |
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elseif ( is_front_page() ) { |
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$url = $this->get_home_url( $language ); |
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} |
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} |
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|
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$url = ! empty( $url ) && ! is_wp_error( $url ) ? $url : null; |
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|
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/** |
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* Filter the translation url of the current page before Polylang caches it |
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* |
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* @since 1.1.2 |
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* |
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* @param null|string $url The translation url, null if none was found |
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* @param string $language The language code of the translation |
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*/ |
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$translation_url = (string) apply_filters( 'pll_translation_url', $url, $language->slug ); |
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|
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// Don't cache before template_redirect to avoid a conflict with Barrel + WP Bakery Page Builder |
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if ( did_action( 'template_redirect' ) ) { |
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$this->cache->set( 'translation_url:' . $language->slug, $translation_url ); |
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} |
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|
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return $translation_url; |
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} |
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|
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/** |
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* Get the translation of the current archive url |
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* used also for search |
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* |
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* @since 1.2 |
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* |
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* @param PLL_Language $language An object representing a language. |
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* @return string |
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*/ |
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public function get_archive_url( $language ) { |
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$url = pll_get_requested_url(); |
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$url = $this->links_model->switch_language_in_link( $url, $language ); |
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$url = $this->links_model->remove_paged_from_link( $url ); |
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|
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/** |
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* Filter the archive url |
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* |
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* @since 1.6 |
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* |
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* @param string $url Url of the archive |
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* @param object $language Language of the archive |
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*/ |
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return apply_filters( 'pll_get_archive_url', $url, $language ); |
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} |
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|
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/** |
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* Returns the home url in the right language. |
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* |
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* @since 0.1 |
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* |
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* @param PLL_Language|string $language Optional, defaults to current language. |
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* @param bool $is_search Optional, whether we need the home url for a search form, defaults to false. |
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*/ |
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public function get_home_url( $language = '', $is_search = false ) { |
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if ( empty( $language ) ) { |
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$language = $this->curlang; |
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} |
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|
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return parent::get_home_url( $language, $is_search ); |
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} |
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} |
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|
