236 lines
6.6 KiB
PHP
236 lines
6.6 KiB
PHP
<?php
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/**
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* @package Polylang
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*/
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/**
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* Main Polylang class when on frontend, accessible from @see PLL().
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*
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* @since 1.2
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*/
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class PLL_Frontend extends PLL_Base {
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/**
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* Current language.
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*
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* @var PLL_Language
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*/
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public $curlang;
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/**
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* @var PLL_Frontend_Auto_Translate
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*/
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public $auto_translate;
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/**
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* The class selecting the current language.
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*
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* @var PLL_Choose_Lang
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*/
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public $choose_lang;
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/**
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* @var PLL_Frontend_Filters
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*/
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public $filters;
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/**
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* @var PLL_Frontend_Filters_Links
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*/
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public $filters_links;
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/**
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* @var PLL_Frontend_Filters_Search
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*/
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public $filters_search;
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/**
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* @var PLL_Frontend_Links
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*/
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public $links;
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/**
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* @var PLL_Frontend_Nav_Menu
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*/
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public $nav_menu;
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/**
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* @var PLL_Frontend_Static_Pages
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*/
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public $static_pages;
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/**
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* @var PLL_Frontend_Filters_Widgets
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*/
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public $filters_widgets;
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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_Links_Model $links_model Reference to the links model.
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*/
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public function __construct( &$links_model ) {
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parent::__construct( $links_model );
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add_action( 'pll_language_defined', array( $this, 'pll_language_defined' ), 1 );
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// Avoids the language being the queried object when querying multiple taxonomies
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add_action( 'parse_tax_query', array( $this, 'parse_tax_query' ), 1 );
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// Filters posts by language
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add_action( 'parse_query', array( $this, 'parse_query' ), 6 );
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// Not before 'check_canonical_url'
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if ( ! defined( 'PLL_AUTO_TRANSLATE' ) || PLL_AUTO_TRANSLATE ) {
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add_action( 'template_redirect', array( $this, 'auto_translate' ), 7 );
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}
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}
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/**
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* Setups the language chooser based on options
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*
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* @since 1.2
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*/
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public function init() {
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parent::init();
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$this->links = new PLL_Frontend_Links( $this );
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// Static front page and page for posts
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if ( 'page' === get_option( 'show_on_front' ) ) {
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$this->static_pages = new PLL_Frontend_Static_Pages( $this );
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}
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// Setup the language chooser
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$c = array( 'Content', 'Url', 'Url', 'Domain' );
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$class = 'PLL_Choose_Lang_' . $c[ $this->options['force_lang'] ];
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$this->choose_lang = new $class( $this );
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$this->choose_lang->init();
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// Need to load nav menu class early to correctly define the locations in the customizer when the language is set from the content
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$this->nav_menu = new PLL_Frontend_Nav_Menu( $this );
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}
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/**
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* Setups filters and nav menus once the language has been defined
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*
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* @since 1.2
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*
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* @return void
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*/
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public function pll_language_defined() {
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// Filters
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$this->filters_links = new PLL_Frontend_Filters_Links( $this );
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$this->filters = new PLL_Frontend_Filters( $this );
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$this->filters_search = new PLL_Frontend_Filters_Search( $this );
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$this->filters_widgets = new PLL_Frontend_Filters_Widgets( $this );
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// Auto translate for Ajax
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if ( ( ! defined( 'PLL_AUTO_TRANSLATE' ) || PLL_AUTO_TRANSLATE ) && wp_doing_ajax() ) {
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$this->auto_translate();
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}
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}
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/**
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* When querying multiple taxonomies, makes sure that the language is not the queried object.
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*
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* @since 1.8
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*
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* @param WP_Query $query WP_Query object.
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* @return void
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*/
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public function parse_tax_query( $query ) {
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$pll_query = new PLL_Query( $query, $this->model );
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$queried_taxonomies = $pll_query->get_queried_taxonomies();
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if ( ! empty( $queried_taxonomies ) && 'language' == reset( $queried_taxonomies ) ) {
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$query->tax_query->queried_terms['language'] = array_shift( $query->tax_query->queried_terms );
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}
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}
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/**
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* Modifies some query vars to "hide" that the language is a taxonomy and avoid conflicts.
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*
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* @since 1.2
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*
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* @param WP_Query $query WP_Query object.
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* @return void
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*/
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public function parse_query( $query ) {
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$qv = $query->query_vars;
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$pll_query = new PLL_Query( $query, $this->model );
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$taxonomies = $pll_query->get_queried_taxonomies();
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// Allow filtering recent posts and secondary queries by the current language
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if ( ! empty( $this->curlang ) ) {
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$pll_query->filter_query( $this->curlang );
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}
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// Modifies query vars when the language is queried
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if ( ! empty( $qv['lang'] ) || ( ! empty( $taxonomies ) && array( 'language' ) == array_values( $taxonomies ) ) ) {
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// Do we query a custom taxonomy?
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$taxonomies = array_diff( $taxonomies, array( 'language', 'category', 'post_tag' ) );
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// Remove pages query when the language is set unless we do a search
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// Take care not to break the single page, attachment and taxonomies queries!
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if ( empty( $qv['post_type'] ) && ! $query->is_search && ! $query->is_singular && empty( $taxonomies ) && ! $query->is_category && ! $query->is_tag ) {
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$query->set( 'post_type', 'post' );
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}
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// Unset the is_archive flag for language pages to prevent loading the archive template
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// Keep archive flag for comment feed otherwise the language filter does not work
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if ( empty( $taxonomies ) && ! $query->is_comment_feed && ! $query->is_post_type_archive && ! $query->is_date && ! $query->is_author && ! $query->is_category && ! $query->is_tag ) {
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$query->is_archive = false;
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}
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// Unset the is_tax flag except if another custom tax is queried
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if ( empty( $taxonomies ) && ( $query->is_category || $query->is_tag || $query->is_author || $query->is_post_type_archive || $query->is_date || $query->is_search || $query->is_feed ) ) {
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$query->is_tax = false;
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unset( $query->queried_object ); // FIXME useless?
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}
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}
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}
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/**
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* Auto translate posts and terms ids
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*
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* @since 1.2
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*
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* @return void
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*/
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public function auto_translate() {
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$this->auto_translate = new PLL_Frontend_Auto_Translate( $this );
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}
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/**
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* Resets some variables when the blog is switched.
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* Overrides the parent method.
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*
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* @since 1.5.1
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*
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* @param int $new_blog_id New blog ID.
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* @param int $prev_blog_id Previous blog ID.
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* @return void
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*/
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public function switch_blog( $new_blog_id, $prev_blog_id ) {
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parent::switch_blog( $new_blog_id, $prev_blog_id );
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// Need to check that some languages are defined when user is logged in, has several blogs, some without any languages.
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if ( $this->is_active_on_new_blog( $new_blog_id, $prev_blog_id ) && did_action( 'pll_language_defined' ) && $this->model->get_languages_list() ) {
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static $restore_curlang;
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if ( empty( $restore_curlang ) ) {
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$restore_curlang = $this->curlang->slug; // To always remember the current language through blogs.
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}
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$lang = $this->model->get_language( $restore_curlang );
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$this->curlang = $lang ? $lang : $this->model->get_language( $this->options['default_lang'] );
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if ( isset( $this->static_pages ) ) {
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$this->static_pages->init();
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}
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$this->load_strings_translations();
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}
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}
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}
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