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<?php
/**
* @package Polylang
*/
/**
* Links model for the default permalinks
* for example mysite.com/?somevar=something&lang=en.
*
* @since 1.2
*/
class PLL_Links_Default extends PLL_Links_Model {
/**
* Tells this child class of PLL_Links_Model does not use pretty permalinks.
*
* @var bool
*/
public $using_permalinks = false;
/**
* Adds the language code in a url.
*
* @since 1.2
* @since 3.4 Accepts now a language slug.
*
* @param string $url The url to modify.
* @param PLL_Language|string|false $language Language object or slug.
* @return string The modified url.
*/
public function add_language_to_link( $url, $language ) {
if ( $language instanceof PLL_Language ) {
$language = $language->slug;
}
return empty( $language ) || ( $this->options['hide_default'] && $this->options['default_lang'] === $language ) ? $url : add_query_arg( 'lang', $language, $url );
}
/**
* Removes the language information from an url.
*
* @since 1.2
*
* @param string $url The url to modify.
* @return string The modified url.
*/
public function remove_language_from_link( $url ) {
return remove_query_arg( 'lang', $url );
}
/**
* Returns the link to the first page.
*
* @since 1.2
*
* @param string $url The url to modify.
* @return string The modified url.
*/
public function remove_paged_from_link( $url ) {
return remove_query_arg( 'paged', $url );
}
/**
* Returns the link to the paged page.
*
* @since 1.5
*
* @param string $url The url to modify.
* @param int $page The page number.
* @return string The modified url.
*/
public function add_paged_to_link( $url, $page ) {
return add_query_arg( array( 'paged' => $page ), $url );
}
/**
* Gets the language slug from the url if present.
*
* @since 1.2
* @since 2.0 Add the $url argument.
*
* @param string $url Optional, defaults to the current url.
* @return string Language slug.
*/
public function get_language_from_url( $url = '' ) {
if ( empty( $url ) ) {
$url = pll_get_requested_url();
}
$pattern = sprintf(
'#[?&]lang=(?<lang>%s)(?:$|&)#',
implode( '|', $this->model->get_languages_list( array( 'fields' => 'slug' ) ) )
);
return preg_match( $pattern, $url, $matches ) ? $matches['lang'] : ''; // $matches['lang'] is the slug of the requested language.
}
/**
* Returns the static front page url in the given language.
*
* @since 1.8
* @since 3.4 Accepts now an array of language properties.
*
* @param PLL_Language|array $language Language object or array of language properties.
* @return string The static front page url.
*/
public function front_page_url( $language ) {
if ( $language instanceof PLL_Language ) {
$language = $language->to_array();
}
if ( $this->options['hide_default'] && $language['is_default'] ) {
return trailingslashit( $this->home );
}
$url = home_url( '/?page_id=' . $language['page_on_front'] );
return $this->options['force_lang'] ? $this->add_language_to_link( $url, $language['slug'] ) : $url;
}
}