<?php

/**
 * block_ip.plugin.php
 *
 * Blocks one or more IP addresses. Also a network can be blocked starting with a common IP e.g. 1.2.x.x
 *
 * @author   Svetoslav Marinov <hide@address.com>
 * @version  1.0
 * @package  block_ip
 */

class seofilter_plugin_block_ip extends seofilter_plugin {
    var $version = 1.0;

    /**
     * $event can be executed
     * PRE, POST, INPUT, OUTPUT Filter
     *
     * @param   constant
     * @access  public
     * @return  bool
     */
    function execute($event)
    {
      if ($event == SEOFILTER_EVENT_INPUT) {
        if ($this->_forbid_ip()) {
            $this->content('Access denied.');
            $this->status(SEOFILTER_STATUS_CONTENT_CHANGED | SEOFILTER_STATUS_EXIT);
            return false;
          }
      }

      return true;
    }

    /**
     * Performs a check if IP address whether the user should be stoped or not for viewing the forum.
     *
     * @param   array $matches
     * @return  string
     * @access  private
     */
    function _forbid_ip($matches = array())
    {
        $stat = 0;

        $params = $this->params();
        if (!empty($params['block'])) {
            $ips = (array) $params['block'];

            foreach ($ips as $ip) {
                $ipq = preg_quote($ip);
                // If the IP matches from the begining. Block it.
                if (preg_match('#^' . $ipq . '#', $_SERVER['REMOTE_ADDR'])) {
                    $stat = 1;
                    break;
                }
            }
        }
        return $stat;
    }
}

?>