<?php

/*
 * links model for use when using one domain per language
 * for example mysite.com/sth and mysite.fr/qqch
 * implements the "links_model interface"
 *
 * @since 1.2
 */
class PLL_Links_Domain extends PLL_Links_Permalinks {

	/*
	 * constructor
	 *
	 * @since 1.8
	 *
	 * @param object $model PLL_Model instance
	 */
	public function __construct( &$model ) {
		parent::__construct( $model );

		add_filter( 'site_url', array( &$this, 'site_url' ) );
	}


	/*
	 * adds the language code in url
	 * links_model interface
	 *
	 * @since 1.2
	 *
	 * @param string $url url to modify
	 * @param object $lang language
	 * @return string modified url
	 */
	public function add_language_to_link( $url, $lang ) {
		if ( ! empty( $lang ) && ! empty( $this->options['domains'][ $lang->slug ] ) ) {
			$url = str_replace( $this->home, $this->options['domains'][ $lang->slug ], $url );
		}
		return $url;
	}

	/*
	 * returns the url without language code
	 * links_model interface
	 *
	 * @since 1.2
	 *
	 * @param string $url url to modify
	 * @return string modified url
	 */
	public function remove_language_from_link( $url ) {
		if ( ! empty( $this->options['domains'] ) ) {
			$url = str_replace( ( is_ssl() ? 'https://' : 'http://' ) . parse_url( $url, PHP_URL_HOST ) . parse_url( $this->home, PHP_URL_PATH ), $this->home, $url );
		}
		return $url;
	}

	/*
	 * returns the language based on language code in url
	 * links_model interface
	 *
	 * @since 1.2
	 *
	 * @return string language slug
	 */
	public function get_language_from_url() {
		return ( $lang = array_search( ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . parse_url( $this->home, PHP_URL_PATH ), $this->options['domains'] ) ) ? $lang : $this->options['default_lang'];
	}

	/*
	 * returns the home url
	 * links_model interface
	 *
	 * @since 1.3.1
	 *
	 * @param object $lang PLL_Language object
	 * @return string
	 */
	function home_url( $lang ) {
		return trailingslashit( empty( $this->options['domains'][ $lang->slug ] ) ? $this->home : $this->options['domains'][ $lang->slug ] );
	}

	/*
	 * get hosts managed on the website
	 *
	 * @since 1.5
	 *
	 * @return array list of hosts
	 */
	public function get_hosts() {
		foreach ( $this->options['domains'] as $domain ) {
			$hosts[] = parse_url( $domain, PHP_URL_HOST );
		}
		return $hosts;
	}

	/*
	 * returns the correct site url ( mainly to get the correct login form )
	 *
	 * @since 1.8
	 *
	 * @param string $url
	 * @return string
	 */
	public function site_url( $url ) {
		$lang = $this->get_language_from_url();
		$lang = $this->model->get_language( $lang );
		return $this->add_language_to_link( $url, $lang );
	}
}
