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<?php
namespace Yoast\WP\SEO\Helpers;
use WPSEO_Language_Utils;
use Yoast\WP\SEO\Config\Researcher_Languages;
/**
* A helper object for language features.
*/
class Language_Helper {
/**
* The languages with inclusive language analysis support.
*
* @var string[]
*/
public static $languages_with_inclusive_language_support = [ 'en' ];
/**
* Checks whether word form recognition is active for the used language.
*
* @param string $language The used language.
*
* @return bool Whether word form recognition is active for the used language.
*/
public function is_word_form_recognition_active( $language ) {
$supported_languages = [ 'de', 'en', 'es', 'fr', 'it', 'nl', 'ru', 'id', 'pt', 'pl', 'ar', 'sv', 'he', 'hu', 'nb', 'tr', 'cs', 'sk', 'el', 'ja' ];
return \in_array( $language, $supported_languages, true );
}
/**
* Checks whether the given language has function word support.
* (E.g. function words are used or filtered out for this language when doing some SEO and readability assessments).
*
* @param string $language The language to check.
*
* @return bool Whether the language has function word support.
*/
public function has_function_word_support( $language ) {
$supported_languages = [ 'en', 'de', 'nl', 'fr', 'es', 'it', 'pt', 'ru', 'pl', 'sv', 'id', 'he', 'ar', 'hu', 'nb', 'tr', 'cs', 'sk', 'fa', 'el', 'ja' ];
return \in_array( $language, $supported_languages, true );
}
/**
* Checks whether the given language has inclusive language support.
*
* @param string $language The language to check if inclusive language is supported.
*
* @return bool Whether the language has inclusive language support.
*/
public function has_inclusive_language_support( $language ) {
return \in_array( $language, self::$languages_with_inclusive_language_support, true );
}
/**
* Checks whether we have a specific researcher for the current locale and returns that language.
* If there is no researcher for the current locale, returns default as the researcher.
*
* @return string The language to use to select a researcher.
*/
public function get_researcher_language() {
$researcher_language = WPSEO_Language_Utils::get_language( \get_locale() );
$supported_languages = Researcher_Languages::SUPPORTED_LANGUAGES;
if ( ! \in_array( $researcher_language, $supported_languages, true ) ) {
$researcher_language = 'default';
}
return $researcher_language;
}
/**
* Returns The site language code without region
* (e.g. 'en' for 'en_US' or 'en_GB').
*
* @return string The site language code without region.
*/
public function get_language() {
return WPSEO_Language_Utils::get_language( \get_locale() );
}
}