<?php

// If this file is called directly, abort.
defined( 'ABSPATH' ) || exit;

/**
 * The 404 error data class.
 *
 * This class set all required information about the current
 * 404 page. This class can be extended to access the 404
 * page details such as URL, Time, User Agent etc.
 *
 * @link       https://duckdev.com/products/404-to-301/
 * @author     Joel James <mail@cjoel.com>
 * @license    http://www.gnu.org/licenses/ GNU General Public License
 * @category   Core
 * @package    JJ4T3
 * @subpackage 404Data
 */
class JJ4T3_404_Data {

	/**
	 * Visitor IP address.
	 *
	 * @var    string
	 * @access public
	 */
	public $ip = '';

	/**
	 * Visitor user agent.
	 *
	 * @var    string
	 * @access public
	 */
	public $ua = '';

	/**
	 * Referring link.
	 *
	 * @var    string
	 * @access public
	 */
	public $ref = 'n/a';

	/**
	 * Current requested path.
	 *
	 * @var    array
	 * @access public
	 */
	public $url = '';

	/**
	 * Current date and time.
	 *
	 * @var    array
	 * @access public
	 */
	public $time = '';

	/**
	 * Initialize the class.
	 *
	 * @since  3.0.0
	 * @access private
	 */
	public function init() {
		$this->set_ip();
		$this->set_ref();
		$this->set_ua();
		$this->set_url();
		$this->set_time();
	}

	/**
	 * Set visitors IP address.
	 *
	 * Get real IP address of the user.
	 * http://stackoverflow.com/a/55790/3845839
	 *
	 * @since  2.2.6
	 * @access private
	 *
	 * @return void
	 */
	private function set_ip() {
		// IP variables in priority oder.
		$headers = array( 'HTTP_CLIENT_IP', 'HTTP_X_FORWARDED_FOR', 'REMOTE_ADDR' );
		foreach ( $headers as $header ) {
			if ( ! empty( $_SERVER[ $header ] ) ) {
				/**
				 * Filter to alter visitors IP address.
				 *
				 * @since 3.0.0
				 *
				 * @param string $ip Value for IP Address.
				 */
				$this->ip = sanitize_text_field( apply_filters( 'jj4t3_404_ip', $_SERVER[ $header ] ) );

				break;
			}
		}
	}

	/**
	 * Set visitors user agent/browser.
	 *
	 * @since  3.0.0
	 * @access private
	 *
	 * @return void
	 */
	private function set_ua() {
		if ( isset( $_SERVER['HTTP_USER_AGENT'] ) ) {
			/**
			 * Filter to alter User Agent.
			 *
			 * @since 3.0.0
			 *
			 * @param string $ua Value for User Agent.
			 */
			$this->ua = sanitize_text_field( apply_filters( 'jj4t3_404_ua', $_SERVER['HTTP_USER_AGENT'] ) );
		}
	}

	/**
	 * Set visitors referring link.
	 *
	 * @since  3.0.0
	 * @access private
	 *
	 * @return void
	 */
	private function set_ref() {
		if ( isset( $_SERVER['HTTP_REFERER'] ) ) {
			/**
			 * Filter to alter referrer url.
			 *
			 * To alter the url where the visitor comes from.
			 *
			 * @since 3.0.0
			 *
			 * @param string $ref Value for referral.
			 */
			$this->ref = esc_url_raw( apply_filters( 'jj4t3_404_ref', $_SERVER['HTTP_REFERER'] ) );
		}
	}

	/**
	 * Set visitors referring link.
	 *
	 * @since  3.0.0
	 * @access private
	 *
	 * @return void
	 */
	private function set_url() {
		if ( isset( $_SERVER['REQUEST_URI'] ) ) {
			/**
			 * Filter to alter current 404 path.
			 *
			 * It is not recommended to change this value.
			 *
			 * @since 3.0.0
			 *
			 * @param string $url Value for 404 URL.
			 */
			$this->url = untrailingslashit( esc_url_raw( apply_filters( 'jj4t3_404_url', $_SERVER['REQUEST_URI'] ) ) );
		}
	}

	/**
	 * Set current time.
	 *
	 * @since  3.0.0
	 * @access private
	 *
	 * @return void
	 */
	private function set_time() {
		/**
		 * Filter to alter current time.
		 *
		 * @note  If you using this filter, remember to
		 *  return proper MySQL time format.
		 *
		 * @since 3.0.0
		 */
		$this->time = apply_filters( 'jj4t3_404_time', current_time( 'mysql' ) );
	}

	/**
	 * Exclude specified paths from 404.
	 *
	 * If paths entered in exclude paths option is
	 * found in current 404 page, skip this from
	 * 404 actions.
	 *
	 * @since  2.0.8
	 * @access private
	 *
	 * @return boolean
	 */
	public function is_excluded() {
		$excluded = jj4t3_get_option( 'exclude_paths', '' );

		$paths = array();

		// If no exclude path set, return false early.
		if ( ! empty( $excluded ) ) {
			// Split by line break.
			$paths = explode( "\n", $excluded );
		}

		/**
		 * Filter to alter exclude path values.
		 *
		 * @note  You should return array if strings .
		 *
		 * @since 3.0.0
		 */
		$paths = apply_filters( 'jj4t3_404_excluded_paths', $paths );

		// If split failed, return false.
		if ( empty( $paths ) ) {
			return false;
		}

		// Verify that the excluded path is not matching current page.
		foreach ( $paths as $path ) {
			if ( strpos( $this->url, trim( $path ) ) !== false ) {
				return true;
			}
		}

		return false;
	}
}