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tak wygląda cały plik cashmobile.php :

Version: 1.0
*/

class CashmobileWPPlugin {

  function CashmobileWPPlugin() {
    wp_register_style('cashmbile.css', plugins_url('cashmobile/cashmobile.css'), false, false, 'all');
    wp_register_style('payment_info.css', plugins_url('cashmobile/payment_info.css'), false, false, 'all');
    add_action('admin_menu', array(&$this, 'admin_menu'));
    add_action('admin_init', array(&$this, 'admin_init'));
    add_action('send_headers', array(&$this, 'pre_check'));
    add_filter('the_content', array(&$this, 'check_post'));
    if (!in_array( get_option('cashmobile_access'), array('custom', 'all') )) {
      update_option('cashmobile_access', 'custom');
    }
    if (!in_array( get_option('cashmobile_code'), array('one', 'all') )) {
      update_option('cashmobile_code', 'one');
    }
  }

  function get_check_info($post_id) {
    if (get_option('cashmobile_access') == 'custom') {
      $cashmobile_code_access = get_post_meta($post_id, '_cashmobile_code_access', true)?true:false;
    } else {
      $cashmobile_code_access = get_option('cashmobile_access')=='all'?true:false;
    }
    if (get_option('cashmobile_code') == 'one') {
      $cashmobile_service = get_post_meta($post_id, '_cashmobile_service', true);
      $cashmobile_time_limit = intval(get_post_meta($post_id, '_cashmobile_time_limit', true));
      $cashmobile_access_per_post = true;
    } else {
      $cashmobile_service = get_option('cashmobile_default_service');
      $cashmobile_time_limit = intval(get_option('cashmobile_default_time_limit'));
      $cashmobile_access_per_post = false;
    }
    $services = unserialize(get_option('cashmobile_services', ''));
    $service_data = null;
    foreach ((array)$services as $service) {
      if ($service['uid'] == $cashmobile_service) {
        $service_data = $service;
        break;
      }
    }
    return array($cashmobile_code_access, $cashmobile_access_per_post, $cashmobile_service, $cashmobile_time_limit, $service_data);
  }

  function pre_check($wp) {
    if (!session_id())
      session_start();
    global $cashmobile_auth, $cashmobile_error;

    $cashmobile_auth = $_SESSION['cashmobile_auth'];
    if (($_SERVER['REQUEST_METHOD'] == 'POST') && (isset($_POST['id'])) && (isset($_POST['payment_code']))) {
      $post_id = intval($_POST['id']);
      $code = $_POST['payment_code'];

      list($cashmobile_code_access, $cashmobile_access_per_post, $cashmobile_service, $cashmobile_time_limit, $service_data) = self::get_check_info($post_id);
      $cashmobile_hash = get_option('cashmobile_hash');

      $is_correct = false;
      if ($service_data['type'] == 'sms') {
        $http = new WP_Http();
        $get = $http->request("http://system.pinapplegroup.in/api/{$cashmobile_hash}/check/smscode?keyword_id={$service_data['id']}&code={$code}");
        if ( ($get) && ($get['response']['code'] ==200) ) {
          if ($get['body'] == 1) {
            $is_correct = true;
          }
        }
      }

      if ($is_correct) {
        $cashmobile_auth[$post_id] = time();
        $cashmobile_auth['default'] = time();
      } else {
        $cashmobile_error[$post_id] = 'Wpisany kod jest nieprawidłowy.';
      }

      $_SESSION['cashmobile_auth'] = $cashmobile_auth;
    }

    if ( (!isset($_SESSION['timezone'])) && get_option('cashmobile_show_time_limit') ) {
      if (!isset($_REQUEST['offset'])) {
?>
<script>
  var d = new Date()
  var offset= -d.getTimezoneOffset()/60;
  location.href = "<?php echo $_SERVER['PHP_SELF']; ?>?offset="+offset;
</script>
<?php
      } else {
        $zonelist = array('Kwajalein' => -12.00, 'Pacific/Midway' => -11.00, 'Pacific/Honolulu' => -10.00, 'America/Anchorage' => -9.00, 'America/Los_Angeles' => -8.00, 'America/Denver' => -7.00, 'America/Tegucigalpa' => -6.00, 'America/New_York' => -5.00, 'America/Caracas' => -4.30, 'America/Halifax' => -4.00, 'America/St_Johns' => -3.30, 'America/Argentina/Buenos_Aires' => -3.00, 'America/Sao_Paulo' => -3.00, 'Atlantic/South_Georgia' => -2.00, 'Atlantic/Azores' => -1.00, 'Europe/Dublin' => 0, 'Europe/Belgrade' => 1.00, 'Europe/Warsaw' => 2.00, 'Asia/Kuwait' => 3.00, 'Asia/Tehran' => 3.30, 'Asia/Muscat' => 4.00, 'Asia/Yekaterinburg' => 5.00, 'Asia/Kolkata' => 5.30, 'Asia/Katmandu' => 5.45, 'Asia/Dhaka' => 6.00, 'Asia/Rangoon' => 6.30, 'Asia/Krasnoyarsk' => 7.00, 'Asia/Brunei' => 8.00, 'Asia/Seoul' => 9.00, 'Australia/Darwin' => 9.30, 'Australia/Canberra' => 10.00, 'Asia/Magadan' => 11.00, 'Pacific/Fiji' => 12.00, 'Pacific/Tongatapu' => 13.00);
        $index = array_keys($zonelist, $_REQUEST['offset']);
        $_SESSION['timezone'] = $index[0];
      }
    }
    date_default_timezone_set($_SESSION['timezone']);

  }

  function check_post($content) {
    global $wp_query, $cashmobile_auth, $cashmobile_error;
    $post = $wp_query->post;

    list($cashmobile_code_access, $cashmobile_access_per_post, $cashmobile_service, $cashmobile_time_limit, $service_data) = self::get_check_info($post->ID);
    $cashmobile_show_time_limit = get_option('cashmobile_show_time_limit');

    if (get_option('cashmobile_admin_full_access') && current_user_can('administrator')) {
      $cashmobile_code_access = false;
    }

    $cashmobile_has_access = true;
    if ($cashmobile_code_access) {
      if ($cashmobile_access_per_post) {
        $check_id = $post->ID;
      } else {
        $check_id = 'default';
      }
      if (isset($cashmobile_auth[$check_id])) {
        if ($cashmobile_time_limit > 0) {
          if ((time() - $cashmobile_time_limit * 60) > $cashmobile_auth[$check_id]) {
            $cashmobile_has_access = false;
          } else if ($cashmobile_show_time_limit) {
            wp_print_styles('payment_info.css');
            $content = '<span class="time_limit">Dostęp do '.date('Y-m-d H:i', $cashmobile_auth[$check_id] + $cashmobile_time_limit * 60).'</span>'.$content;
          }
        }
      } else {
        $cashmobile_has_access = false;
      }
    }

    if ($cashmobile_has_access) {
      return $content;
    } else {
      ob_start();
      global $id, $payment_method;
      $id = $post->ID;
      $payment_method = 'powiadom autora';
      if ($service_data) {
        if ($service_data['type'] == 'sms') {
          $payment_method = 'wyślij SMS o treści '.$service_data['keyword'].' na numer '.$service_data['la'].' (koszt '.number_format($service_data['price'], 2, ',', '').' zł netto za SMS)';
        } else {
          $payment_method = 'zadzwoń na numer '.$service_data['dnis'].($service_data['pin']?(' i po komunikacie wybierz kod '.$service_data['pin'].' z klawiatury telefonu'):'').' (koszt '.number_format($service_data['price'], 2, ',', '').' zł netto '.$service_data['billing_name'].')';
        }
      }

      require('payment_info.php');
      $payment_contents = ob_get_clean();
      return $payment_contents;
    }
  }

  function admin_init() {
    register_setting( 'kody-cashmobile-settings-group', 'cashmobile_hash' );
    register_setting( 'kody-cashmobile-settings-group', 'cashmobile_access' );
    register_setting( 'kody-cashmobile-settings-group', 'cashmobile_code' );
    register_setting( 'kody-cashmobile-settings-group', 'cashmobile_default_service' );
    register_setting( 'kody-cashmobile-settings-group', 'cashmobile_default_time_limit' );
    register_setting( 'kody-cashmobile-settings-group', 'cashmobile_show_time_limit' );
    register_setting( 'kody-cashmobile-settings-group', 'cashmobile_admin_full_access' );
  }

  function admin_menu() {
    add_menu_page('Wtyczka Kody Cashmobile', 'Cashmobile', 'administrator', 'cashmobile_settings', array(&$this, 'settings_page'), plugins_url('/images/cashmobile-icon.png', __FILE__));
    add_submenu_page('cashmobile_settings', 'Wtyczka Kody Cashmobile', 'Ustawienia', 'administrator', 'cashmobile_settings', array(&$this, 'settings_page'));
    add_submenu_page('cashmobile_settings', 'Wtyczka Kody Cashmobile', 'Usługi', 'administrator', 'cashmobile_services', array(&$this, 'services_page'));
    if (get_option('cashmobile_access') == 'custom') {
      add_meta_box('cashmobile', 'Kody Cashmobile', array(&$this, 'settings_box'), 'post', 'side', 'high');
      add_meta_box('cashmobile', 'Kody Cashmobile', array(&$this, 'settings_box'), 'page', 'side', 'high');
      add_action('save_post', array(&$this, 'save_settings_box'));
    }
  }

  function save_settings_box($pid) {
    if (!wp_verify_nonce($_POST['cashmobile_token'], 'cashmobile_settings_box')) {
      return $pid;
    }

    if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) {
      return $pid;
    }

    $cashmobile_code_access = $_POST['cashmobile_code_access'];
    if (!add_post_meta($pid, '_cashmobile_code_access', $cashmobile_code_access?true:false, true))
      update_post_meta($pid, '_cashmobile_code_access', $cashmobile_code_access?true:false);

    if (get_option('cashmobile_code') == 'one') {
      $cashmobile_service = $_POST['cashmobile_service'];
      if (!add_post_meta($pid, '_cashmobile_service', $cashmobile_service, true))
        update_post_meta($pid, '_cashmobile_service', $cashmobile_service);

      $cashmobile_time_limit = intval($_POST['cashmobile_time_limit']);
      if (!add_post_meta($pid, '_cashmobile_time_limit', $cashmobile_time_limit, true))
        update_post_meta($pid, '_cashmobile_time_limit', $cashmobile_time_limit);
    }
  }

  function settings_box() {
    global $services, $cashmobile_code_access;
    $services = unserialize(get_option('cashmobile_services', ''));

    if (isset($_GET['post'])) {
      $pid = $_GET['post'];
      if (get_post_meta($pid, '_cashmobile_code_access', true))
        $cashmobile_code_access = true;
      else
        $cashmobile_code_access = false;

      if (get_option('cashmobile_code') == 'one') {
        global $cashmobile_service, $cashmobile_time_limit;
        if (!$cashmobile_service = get_post_meta($pid, '_cashmobile_service', true)) {
          $cashmobile_service = get_option('cashmobile_default_service');
        }

        if (!$cashmobile_time_limit = get_post_meta($pid, '_cashmobile_time_limit', true)) {
          $cashmobile_time_limit = get_option('cashmobile_default_time_limit');
        }
      }
    } else {
      $cashmobile_code_access = false;
      if (get_option('cashmobile_code') == 'one') {
        global $cashmobile_service, $cashmobile_time_limit;
        $cashmobile_service = get_option('cashmobile_default_service');
        $cashmobile_time_limit = get_option('cashmobile_default_time_limit');
      }
    }

    require('settings_box.php');
  }

  function settings_page() {
    global $services;
    $services = unserialize(get_option('cashmobile_services', ''));

    require('settings_page.php');
  }

  function services_page() {
    global $error, $services;
    $error = null;
    $services = unserialize(get_option('cashmobile_services', ''));
    if ($_SERVER['REQUEST_METHOD'] == 'POST') {
      $post = wp_remote_get('https://www.system.pinapplegroup.com/api/'.get_option('cashmobile_hash').'/services/smscode', array( 'sslverify' => false ));
      if ( !is_wp_error( $post ) && ($post['response']['code'] == 200) ) {
        $services_xml = new SimpleXMLElement($post['body'], LIBXML_NOERROR | LIBXML_NOWARNING | LIBXML_ERR_NONE );
        if ($services_xml->error) {
          $error = 'Błąd: '.((string)$services_xml->error);
          $services = array();
          update_option('cashmobile_services', serialize($services));
        } else if ($services_xml->service) {
          $services = array();
          foreach ($services_xml->service as $service) {
            $service_data = array();
            foreach ($service as $tag => $val) {
              $service_data[$tag] = (string)$val;
            }
            $service_data['uid'] = $service_data['type'].'_'.$service_data['id'].($service_data['type']=='ivr'?('_'.$service_data['pin']):'');
            if ($service_data['type'] == 'sms') {
              $service_data['name'] = 'SMS o treści '.$service_data['keyword'].' na numer '.$service_data['la'].' (koszt '.number_format($service_data['price'], 2, ',', '').' zł za SMS)';
            } else {
              $service_data['name'] = 'Połączenie na numer '.$service_data['dnis'].($service_data['pin']?(', PIN: '.$service_data['pin']):'').' (koszt '.number_format($service_data['price'], 2, ',', '').' zł '.$service_data['billing_name'].')';
            }
            $services[] = $service_data;
          }
          update_option('cashmobile_services', serialize($services));
          $message = 'Lista usług została uaktualniona.';
        } else {
          $message = (string)$services_xml->message;
          $services = array();
          update_option('cashmobile_services', serialize($services));
        }
      }
    }
    require('services_page.php');
  }

}

$cashmobilewp = new CashmobileWPPlugin();