<?php

/**
 * Class to aid WP URI management
 *
 * @author     Time.ly Network Inc.
 * @since      2.0
 *
 * @package    AI1EC
 * @subpackage AI1EC.Routing
 */
class Ai1ec_Wp_Uri_Helper {

    /**
     * Redirect to local site page
     *
     * Local redirect restricts redirection to parts of the same site. Primary
     * use for this is in post-submit actions, when form is submitted to point
     * user back to submission page and clear status from browser, which might
     * cause issues, such as double submission, with users clicking refresh on
     * target page.
     *
     * @param string $target_uri URI to redirect to (must be local site)
     * @param array  $extra      Extra arguments to add to query [optional]
     * @param int    $status     HTTP redirect status [optional=302]
     *
     * @return void Method does not return. It perform implicit `exit` to
     *              protect against further processing
     */
    static public function local_redirect(
        $target_uri,
        array $extra = array(),
        $status      = 302
    ) {
        $target_uri = esc_url_raw( add_query_arg( $extra, $target_uri ) );
        wp_safe_redirect( $target_uri, $status );
        exit( 0 );
    }

    /**
     * Given a URI, extracts pagebase value, as used in `index.php?pagebase={arg}`
     * when matching rewrites.
     * It may, optionally, provide arguments from URI to append to query string.
     * This is indicated via setting {@see $qsa} to non-`false` value.
     *
     * @param string $uri URI to parse pagebase value from
     * @param string $qsa Separator to use to append query arguments [optional]
     *
     * @return string Parsed URL
     */
    static public function get_pagebase( $uri, $qsa = false ) {
        $parsed = parse_url( $uri );
        if ( empty( $parsed ) ) {
            return '';
        }
        $output = '';
        if ( isset( $parsed['path'] ) ) {
            $output = basename( $parsed['path'] );
        }
        if ( isset( $parsed['query'] ) && false !== $qsa ) {
            $output .= $qsa . $parsed['query'];
        }
        return $output;
    }

    /**
     * Gets the calendar pagebase with the full url but without the language.
     *
     * @param string $uri
     * @param string $lang
     * @return string
     */
    static public function get_pagebase_for_links( $uri, $lang ) {
        if( empty( $lang ) ) {
            return $uri;
        }
        if( false !== strpos( $uri, '&amp;lang=' ) ) {
            return str_replace( '&amp;lang=' . $lang, '' , $uri );
        }
        if( false !== strpos( $uri, '?lang=' ) ) {
            return str_replace( '?lang=' . $lang, '' , $uri );
        }
        return $uri;
    }

    /**
     * Gets the currently requested URL.
     *
     * @return string Canonical URL, that is currently requested
     */
    static public function get_current_url( $skip_port = false ) {
        $page_url = 'http';
        if ( isset( $_SERVER['HTTPS'] ) && $_SERVER['HTTPS'] === 'on' ) {
            $page_url .= 's';
        }
        $page_url .= '://';
        if ( isset( $_SERVER['SERVER_NAME'] ) && isset( $_SERVER['SERVER_PORT'] ) && isset( $_SERVER['REQUEST_URI'] ) ) {
            if ( $_SERVER['SERVER_PORT'] !== '80' && true !== $skip_port ) {
                $page_url .= $_SERVER['SERVER_NAME'] . ':' .
                $_SERVER['SERVER_PORT'] . $_SERVER['REQUEST_URI'];
            } else {
                $page_url .= $_SERVER['SERVER_NAME'] . $_SERVER['REQUEST_URI'];
            }
        }
        return $page_url;
    }

}