<?php
/**
* WordPress Clockwork class
*
* Extends the Clockwor wrapper class to use the
* WordPress HTTP API for HTTP calls, attempts to work
* round the differences in PHP versions, such as SSL
* & curl support
*
* @package     Clockwork
* @subpackage  WordPressClockwork       
* @since       1.0
*/

class WordPressClockwork extends Clockwork {

  /**
   * Options key for Clockwork plugins
   */
  const OPTIONS_KEY = 'clockwork_options';

  /**
   * SSL options key for Clockwork plugins
   */
  const SSL_OPTIONS_KEY = 'clockwork_ssl_options';

  /**
   * String to append to API_BASE_URL for getting a new key
   */
  const API_GET_KEY_METHOD = 'get_key';
  
  /**
   * Mapping of country dialing codes to ISO codes
   */
  public static $country_codes = array(
  	'AC' => '247',
  	'AD' => '376',
  	'AE' => '971',
  	'AF' => '93',
  	'AG' => '1268',
  	'AI' => '1264',
  	'AL' => '355',
  	'AM' => '374',
  	'AO' => '244',
  	'AQ' => '672',
  	'AR' => '54',
  	'AS' => '1684',
  	'AT' => '43',
  	'AU' => '61',
  	'AW' => '297',
  	'AX' => '358',
  	'AZ' => '994',
  	'BA' => '387',
  	'BB' => '1246',
  	'BD' => '880',
  	'BE' => '32',
  	'BF' => '226',
  	'BG' => '359',
  	'BH' => '973',
  	'BI' => '257',
  	'BJ' => '229',
  	'BL' => '590',
  	'BM' => '1441',
  	'BN' => '673',
  	'BO' => '591',
  	'BQ' => '599',
  	'BR' => '55',
  	'BS' => '1242',
  	'BT' => '975',
  	'BW' => '267',
  	'BY' => '375',
  	'BZ' => '501',
  	'CA' => '1',
  	'CC' => '61',
  	'CD' => '243',
  	'CF' => '236',
  	'CG' => '242',
  	'CH' => '41',
  	'CI' => '225',
  	'CK' => '682',
  	'CL' => '56',
  	'CM' => '237',
  	'CN' => '86',
  	'CO' => '57',
  	'CR' => '506',
  	'CU' => '53',
  	'CV' => '238',
  	'CW' => '599',
  	'CX' => '61',
  	'CY' => '357',
  	'CZ' => '420',
  	'DE' => '49',
  	'DJ' => '253',
  	'DK' => '45',
  	'DM' => '1767',
  	'DO' => '1809',
  	'DO' => '1829',
  	'DO' => '1849',
  	'DZ' => '213',
  	'EC' => '593',
  	'EE' => '372',
  	'EG' => '20',
  	'EH' => '212',
  	'ER' => '291',
  	'ES' => '34',
  	'ET' => '251',
  	'EU' => '388',
  	'FI' => '358',
  	'FJ' => '679',
  	'FK' => '500',
  	'FM' => '691',
  	'FO' => '298',
  	'FR' => '33',
  	'GA' => '241',
  	'GB' => '44',
  	'GD' => '1473',
  	'GE' => '995',
  	'GF' => '594',
  	'GG' => '44',
  	'GH' => '233',
  	'GI' => '350',
  	'GL' => '299',
  	'GM' => '220',
  	'GN' => '224',
  	'GP' => '590',
  	'GQ' => '240',
  	'GR' => '30',
  	'GT' => '502',
  	'GU' => '1671',
  	'GW' => '245',
  	'GY' => '592',
  	'HK' => '852',
  	'HN' => '504',
  	'HR' => '385',
  	'HT' => '509',
  	'HU' => '36',
  	'ID' => '62',
  	'IE' => '353',
  	'IL' => '972',
  	'IM' => '44',
  	'IN' => '91',
  	'IO' => '246',
  	'IQ' => '964',
  	'IR' => '98',
  	'IS' => '354',
  	'IT' => '39',
  	'JE' => '44',
  	'JM' => '1876',
  	'JO' => '962',
  	'JP' => '81',
  	'KE' => '254',
  	'KG' => '996',
  	'KH' => '855',
  	'KI' => '686',
  	'KM' => '269',
  	'KN' => '1869',
  	'KP' => '850',
  	'KR' => '82',
  	'KW' => '965',
  	'KY' => '1345',
  	'KZ' => '7',
  	'LA' => '856',
  	'LB' => '961',
  	'LC' => '1758',
  	'LI' => '423',
  	'LK' => '94',
  	'LR' => '231',
  	'LS' => '266',
  	'LT' => '370',
  	'LU' => '352',
  	'LV' => '371',
  	'LY' => '218',
  	'MA' => '212',
  	'MC' => '377',
  	'MD' => '373',
  	'ME' => '382',
  	'MF' => '590',
  	'MG' => '261',
  	'MH' => '692',
  	'MK' => '389',
  	'ML' => '223',
  	'MM' => '95',
  	'MN' => '976',
  	'MO' => '853',
  	'MP' => '1670',
  	'MQ' => '596',
  	'MR' => '222',
  	'MS' => '1664',
  	'MT' => '356',
  	'MU' => '230',
  	'MV' => '960',
  	'MW' => '265',
  	'MX' => '52',
  	'MY' => '60',
  	'MZ' => '258',
  	'NA' => '264',
  	'NC' => '687',
  	'NE' => '227',
  	'NF' => '672',
  	'NG' => '234',
  	'NI' => '505',
  	'NL' => '31',
  	'NO' => '47',
  	'NP' => '977',
  	'NR' => '674',
  	'NU' => '683',
  	'NZ' => '64',
  	'OM' => '968',
  	'PA' => '507',
  	'PE' => '51',
  	'PF' => '689',
  	'PG' => '675',
  	'PH' => '63',
  	'PK' => '92',
  	'PL' => '48',
  	'PM' => '508',
  	'PR' => '1787',
  	'PR' => '1939',
  	'PS' => '970',
  	'PT' => '351',
  	'PW' => '680',
  	'PY' => '595',
  	'QA' => '974',
  	'QN' => '374',
  	'QS' => '252',
  	'QY' => '90',
  	'RE' => '262',
  	'RO' => '40',
  	'RS' => '381',
  	'RU' => '7',
  	'RW' => '250',
  	'SA' => '966',
  	'SB' => '677',
  	'SC' => '248',
  	'SD' => '249',
  	'SE' => '46',
  	'SG' => '65',
  	'SH' => '290',
  	'SI' => '386',
  	'SJ' => '47',
  	'SK' => '421',
  	'SL' => '232',
  	'SM' => '378',
  	'SN' => '221',
  	'SO' => '252',
  	'SR' => '597',
  	'SS' => '211',
  	'ST' => '239',
  	'SV' => '503',
  	'SX' => '1721',
  	'SY' => '963',
  	'SZ' => '268',
  	'TA' => '290',
  	'TC' => '1649',
  	'TD' => '235',
  	'TG' => '228',
  	'TH' => '66',
  	'TJ' => '992',
  	'TK' => '690',
  	'TL' => '670',
  	'TM' => '993',
  	'TN' => '216',
  	'TO' => '676',
  	'TR' => '90',
  	'TT' => '1868',
  	'TV' => '688',
  	'TW' => '886',
  	'TZ' => '255',
  	'UA' => '380',
  	'UG' => '256',
  	'UK' => '44',
  	'US' => '1',
  	'UY' => '598',
  	'UZ' => '998',
  	'VA' => '379',
  	'VA' => '39',
  	'VC' => '1784',
  	'VE' => '58',
  	'VG' => '1284',
  	'VI' => '1340',
  	'VN' => '84',
  	'VU' => '678',
  	'WF' => '681',
  	'WS' => '685',
  	'XC' => '991',
  	'XD' => '888',
  	'XG' => '881',
  	'XL' => '883',
  	'XN' => '857',
  	'XN' => '858',
  	'XN' => '870',
  	'XP' => '878',
  	'XR' => '979',
  	'XS' => '808',
  	'XT' => '800',
  	'XV' => '882',
  	'YE' => '967',
  	'YT' => '262',
  	'ZA' => '27',
  	'ZM' => '260',
  	'ZW' => '263',
  );
  
  /** 
   * Legacy username
   * 
   * @var string
   */
  private $username;
  
  /** 
   * Legacy password
   * 
   * @var string
   */
  public $password;
  
  /**
   * Create a new instance of the Clockwork wrapper
   *
   * Also supports passing a username and a password as first and second parameter, but ONLY when 
   * used in WordPressClockwork for the purposes of converting to an API key.
   *
   * @param   string  key         Your Clockwork API Key
   * @param   array   options     Optional parameters for sending SMS
   * @author James Inman
   */
  public function __construct( $arg1, $arg2 = array() ) {
    if( !isset( $arg2 ) || is_array( $arg2 ) ) {
      parent::__construct( $arg1, $arg2 );
    } else {
      $this->username = $arg1;
      $this->password = $arg2;
    }
  }
  
  public function createAPIKey( $name = 'WordPress API Key' ) {
    // Create XML doc for request
    $req_doc = new DOMDocument( '1.0', 'UTF-8' );
    $root = $req_doc->createElement( 'GetKey' );
    $req_doc->appendChild( $root );
    $root->appendChild( $req_doc->createElement( 'Username', $this->username ) );
    $root->appendChild( $req_doc->createElement( 'Password', $this->password ) );
    $root->appendChild( $req_doc->createElement( 'Name', $name ) );
    $req_xml = $req_doc->saveXML();
    // POST XML to Clockwork
    $resp_xml = $this->postToClockwork( self::API_GET_KEY_METHOD, $req_xml );

    // Create XML doc for response
    $resp_doc = new DOMDocument();
    $resp_doc->loadXML( $resp_xml );

    // Parse the response to find credit value
    $key = null;
    $err_no = null;
    $err_desc = null;
          
    foreach( $resp_doc->documentElement->childNodes as $doc_child ) {
      switch( $doc_child->nodeName ) {
        case "Key":
          $key = $doc_child->nodeValue;
          break;
        case "ErrNo":
          $err_no = $doc_child->nodeValue;
          break;
        case "ErrDesc":
          $err_desc = $doc_child->nodeValue;
          break;
        default:
          break;
      }
    }
    
    if( isset( $err_no ) ) {
      throw new ClockworkException( $err_desc, $err_no );
    }
    
    $this->key = $key;
    return $key;
  }
  
  /**
  * Check if the WordPress HTTP API can support SSL
  *
  * @returns bool True if SSL is supported
  */
  public function sslSupport() {
    return wp_http_supports( array( 'ssl' ) );
  }

  /**
  * Make an HTTP POST using the WordPress HTTP API.
  *
  * @param string url URL to send to
  * @param string data Data to POST
  * @return string Response returned by server
  */
  protected function xmlPost( $url, $data ) {
    $args = array(
    'body'    => $data,
    'headers' => array( 'Content-Type' => 'text/xml' ),
    'timeout' => 10, // Seconds
    );
    
    // Check whether WordPress should veryify the SSL certificate
    if( stristr( $url, 'https://' ) ) {
      $args['sslverify'] = $this->sslVerify( $url );
    }

    $result = wp_remote_post( $url, $args );
    if( is_wp_error( $result ) ) {
      error_log( "POST failed: " . $result->get_error_message() );
      throw new ClockworkException( "HTTP Call failed - Error: " . $result->get_error_message() );
    }
    return $result[ 'body' ];
  }

  /**
  * Verify SSL conectivity to the remote host
  *
  * If the request fails store a flag so that we 
  * don't need to do the check again
  */
  private function sslVerify($url) {
    $opt = get_option( self::SSL_OPTIONS_KEY );
    if( !$opt ) {
      $opt = array();
    }
    
    if( !array_key_exists( 'sslverify', $opt ) ) {
      $args = array(
        'timeout' => 10 // Seconds
      );
      
      $result = wp_remote_post( $url, $args );
      
      if( is_wp_error( $result ) ) {
        $opt['sslverify'] = false;
      } else {
        $opt['sslverify'] = true;
      }
      
      update_option( self::SSL_OPTIONS_KEY, $opt );
    }
    return $opt['sslverify'];
  }

}