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230 lines
6.3 KiB
230 lines
6.3 KiB
<?php
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/**
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* @package Polylang
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*/
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/**
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* Base class to manage the static front page and the page for posts.
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*
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* @since 1.8
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*/
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class PLL_Static_Pages {
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/**
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* Id of the page on front.
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*
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* @var int
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*/
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public $page_on_front = 0;
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/**
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* Id of the page for posts.
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*
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* @var int
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*/
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public $page_for_posts = 0;
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/**
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* @var PLL_Model
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*/
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protected $model;
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/**
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* Current language.
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*
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* @var PLL_Language|null
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*/
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protected $curlang;
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/**
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* Constructor: setups filters and actions.
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*
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* @since 1.8
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*
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* @param object $polylang The Polylang object.
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*/
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public function __construct( &$polylang ) {
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$this->model = &$polylang->model;
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$this->curlang = &$polylang->curlang;
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$this->init();
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add_filter( 'pll_additional_language_data', array( $this, 'set_static_pages' ), 5, 2 ); // Before PLL_Links_Model.
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// Clean the languages cache when editing page of front, page for posts.
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add_action( 'update_option_show_on_front', array( $this, 'clean_cache' ) );
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add_action( 'update_option_page_on_front', array( $this, 'clean_cache' ) );
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add_action( 'update_option_page_for_posts', array( $this, 'clean_cache' ) );
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// Refresh rewrite rules when the page on front is modified.
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add_action( 'update_option_page_on_front', 'flush_rewrite_rules' );
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// Add option filters when the current language is defined
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add_action( 'pll_language_defined', array( $this, 'pll_language_defined' ) );
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// Modifies the page link in case the front page is not in the default language.
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add_filter( 'page_link', array( $this, 'page_link' ), 20, 2 );
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// OEmbed.
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add_filter( 'oembed_request_post_id', array( $this, 'oembed_request_post_id' ), 10, 2 );
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}
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/**
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* Stores the page on front and page for posts ids.
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*
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* @since 1.8
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*
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* @return void
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*/
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public function init() {
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$this->page_on_front = 0;
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$this->page_for_posts = 0;
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if ( 'page' !== get_option( 'show_on_front' ) ) {
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return;
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}
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$page_on_front = get_option( 'page_on_front' );
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if ( is_numeric( $page_on_front ) ) {
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$this->page_on_front = (int) $page_on_front;
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}
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$page_for_posts = get_option( 'page_for_posts' );
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if ( is_numeric( $page_for_posts ) ) {
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$this->page_for_posts = (int) $page_for_posts;
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}
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}
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/**
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* Returns the ID of the static page translation.
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*
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* @since 3.4
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*
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* @param string $static_page Static page option name; `page_on_front` or `page_for_posts`.
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* @param array $language Language data.
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* @return int
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*/
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protected function get_translation( $static_page, $language ) {
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$translations = $this->model->post->get_raw_translations( $this->$static_page );
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// When the current static page doesn't have any translation, we must return itself for its language.
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if ( empty( $translations ) ) {
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$page_lang = $this->model->post->get_object_term( $this->$static_page, $this->model->post->get_tax_language() );
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if ( ! empty( $page_lang ) && $page_lang->slug === $language['slug'] ) {
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return $this->$static_page;
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}
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}
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if ( ! isset( $translations[ $language['slug'] ] ) ) {
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return 0;
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}
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return $translations[ $language['slug'] ];
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}
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/**
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* Adds `page_on_front` and `page_for_posts` properties to language data before the object is created.
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*
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* @since 3.4
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*
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* @param array $additional_data Array of language additional data.
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* @param array $language Language data.
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* @return array Language data with additional `page_on_front` and `page_for_posts` options added.
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*/
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public function set_static_pages( $additional_data, $language ) {
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$additional_data['page_on_front'] = $this->get_translation( 'page_on_front', $language );
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$additional_data['page_for_posts'] = $this->get_translation( 'page_for_posts', $language );
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return $additional_data;
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}
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/**
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* Cleans the language cache and resets the internal properties when options are updated.
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*
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* @since 3.4
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*
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* @return void
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*/
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public function clean_cache() {
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$this->model->clean_languages_cache();
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$this->init();
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}
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/**
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* Init the hooks that filter the "page on front" and "page for posts" options.
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*
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* @since 3.3
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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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// Translates page for posts and page on front.
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add_filter( 'option_page_on_front', array( $this, 'translate_page_id' ), 10, 2 );
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add_filter( 'option_page_for_posts', array( $this, 'translate_page_id' ), 10, 2 );
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}
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/**
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* Translates the page on front or page for posts option.
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*
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* @since 3.6 Replaces `translate_page_on_front()` and `translate_page_on_front()` methods.
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*
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* @param int $page_id ID of the page on front or page for posts.
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* @param string $option Option name: `page_on_front` or `page_for_posts`.
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* @return int
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*/
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public function translate_page_id( $page_id, $option ) {
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if ( empty( $this->curlang->{$option} ) ) {
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return $page_id;
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}
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if ( doing_action( "update_option_{$option}" ) || doing_action( 'switch_blog' ) || doing_action( 'before_delete_post' ) || doing_action( 'wp_trash_post' ) ) {
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/*
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* Don't attempt to translate in a 'switch_blog' action as there is a risk to call this function while initializing the languages cache.
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* Don't translate while deleting a post or it will mess up `_reset_front_page_settings_for_post()`.
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* Don't translate while updating the option itself.
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*/
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return $page_id;
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}
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return $this->curlang->{$option};
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}
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/**
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* Modifies the page link in case the front page is not in the default language.
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*
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* @since 0.7.2
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*
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* @param string $link The link to the page.
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* @param int $id The post ID of the page.
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* @return string Modified link.
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*/
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public function page_link( $link, $id ) {
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$lang = $this->model->post->get_language( $id );
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if ( $lang && $id == $lang->page_on_front ) {
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return $lang->get_home_url();
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}
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return $link;
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}
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/**
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* Fixes the oembed for the translated static front page
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* when the language page is redirected to the front page.
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*
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* @since 2.6
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*
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* @param int $post_id The post ID.
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* @param string $url The requested URL.
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* @return int
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*/
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public function oembed_request_post_id( $post_id, $url ) {
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foreach ( $this->model->get_languages_list() as $lang ) {
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if ( is_string( $lang->get_home_url() ) && trailingslashit( $url ) === trailingslashit( $lang->get_home_url() ) ) {
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return (int) $lang->page_on_front;
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}
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}
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return $post_id;
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}
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}
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