<?php
/**
 * Plugin Name: Jigoshop SEB Payment Gateway
 * Description: This plugin extends the Jigoshop payment gateways to add in a SEB gateway.
 * Version: 1.0
 * Author: Aili Madisson
 */


/**  
 *  Copyright 2012
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License, version 2, as 
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


/* Adds seb payment class to Jigoshop
------------------------------------------------------------ */
add_action( 'plugins_loaded', 'jigoshop_seb_payment_gateway', 0 );
function jigoshop_seb_payment_gateway() {
	
	if ( ! class_exists( 'jigoshop_payment_gateway' ) ) return; // if the Jigoshop payment gateway class is not available, do nothing

    add_action('plugins_loaded', 'jigoshop_seb_gateway_init');

    function jigoshop_seb_gateway_init() {
        load_plugin_textdomain( 'jigoshop-seb-gateway', false, dirname( plugin_basename( __FILE__ ) ) . '/languages/' );
    } 
   
    class jigoshop_seb_gateway extends jigoshop_payment_gateway {
		
		public function __construct() { 
        	
            parent::__construct();

            $this->id		   = 'jigoshop_seb_gateway';
        	$this->icon 	   = plugins_url( 'seb.gif', __FILE__ );
        	$this->has_fields  = false;
		
			$this->enabled	   = Jigoshop_Base::get_options()->get_option( 'jigoshop_seb_gateway_enabled' );
			$this->title 	   = Jigoshop_Base::get_options()->get_option( 'jigoshop_seb_gateway_title' );
			$this->description = Jigoshop_Base::get_options()->get_option( 'jigoshop_seb_gateway_description' );
            $this->merchant_id = Jigoshop_Base::get_options()->get_option( 'jigoshop_seb_gateway_merchant_id' );

    		//add_action( 'thankyou_jigoshop_seb_gateway', array( &$this, 'thankyou_page' ) );
    	    add_action( 'init', array( &$this, 'check_callback' ) );
            add_action( 'valid_seb_callback', array( &$this, 'successful_request' ) );
            add_action( 'receipt_jigoshop_seb_gateway', array( &$this, 'receipt_page' ) );

        } 

		/* Gateway options, displayed in admin menu
		------------------------------------------------------ */
        protected function get_default_options() {

            $defaults = array();

            $defaults[] = array( 
                'name' => __( 'SEB', 'jigoshop-seb-gateway' ), 
                'type' => 'title', 
                'desc' => __( 'This payment gateway forwards client to SEB bank where he can make the payment.', 'jigoshop-seb-gateway' ) 
            );

            $defaults[] = array(
                'name' => __( 'Enable SEB', 'jigoshop-seb-gateway' ),
                'desc' => '',
                'tip'  => '',
                'id'   => 'jigoshop_seb_gateway_enabled',
                'std'  => 'no',
                'type' => 'checkbox',
                'choices' => array(
                    'no'  => __( 'No', 'jigoshop-seb-gateway' ),
                    'yes' => __( 'Yes', 'jigoshop-seb-gateway' )
                )
            );

            $defaults[] = array(
                'name' => __( 'Method Title', 'jigoshop-seb-gateway' ),
                'desc' => '',
                'tip'  => __( 'This controls the title which the user sees during checkout.', 'jigoshop-seb-gateway' ),
                'id'   => 'jigoshop_seb_gateway_title',
                'std'  => '',
                'type' => 'text'
            );

            $defaults[] = array(
                'name' => __( 'Customer Message', 'jigoshop-seb-gateway' ),
                'desc' => '',
                'tip'  => __( 'This controls the description which the user sees during checkout.', 'jigoshop-seb-gateway' ),
                'id'   => 'jigoshop_seb_gateway_description',
                'std'  => '',
                'type' => 'longtext'
            );

            $defaults[] = array(
                'name' => __( 'SEB Merchant ID', 'jigoshop-seb-gateway' ),
                'desc' => '',
                'tip'  => __( 'Please insert your SEB merchant ID. This is needed in order to make payment.', 'jigoshop-seb-gateway' ),
                'id'   => 'jigoshop_seb_gateway_merchant_id',
                'std'  => '',
                'type' => 'text'
            );

            return $defaults;
        }
    	
    
		/* Display description for payment fields
		------------------------------------------------------------ */
		function payment_fields() {
            if ( $this->description ) {
                echo wpautop( wptexturize( $this->description ) );
            }
			do_action( 'jigoshop_seb_gateway_payment_fields' ); // allow for insertion of custom code if needed
		}

		/* Display description for thank you page
		------------------------------------------------------------ */
		/*function thankyou_page() {
			if ( $this->description ) echo wpautop( wptexturize( $this->description ) );
			do_action( 'jigoshop_seb_gateway_thankyou_page' ); // allow for insertion of custom code if needed
        }*/
    	

        /* Generate form
        ------------------------------------------------------------ */
        function generate_form( $order_id ) {
            
            $order = new jigoshop_order( $order_id );

            function createSignature( &$VK_a ) {
                $data = _composeData( &$VK_a );
                $pkey = _readPrivKey();
                $pkeyid = openssl_get_privatekey( _readPrivKey() );
                openssl_sign( $data, $signature, $pkeyid );
                $VK_MAC = base64_encode( $signature );
                openssl_free_key( $pkeyid );
                return $VK_MAC;                         
            }
            
            function _readPrivKey() {
                $key_file = plugins_url( 'private_key.pem', __FILE__ );
                $fp = fopen( $key_file, "r" );
                $cert = fread( $fp, 8192 );
                fclose( $fp );                          
                return $cert;
            }
            
            function _composeData( &$VK_a ) {
                $data = "";
                foreach( $VK_a as $data_bit ) {
                    $data .= _padIt( $data_bit );   
                }
                return $data;
            } 
            
            function _padIt( $str = "" ) {
                return str_pad( strlen( $str ), 3, "0", STR_PAD_LEFT ) . $str;
            }

            $currency = Jigoshop_Base::get_options()->get_option( 'jigoshop_currency' );
            $payment_message = __( 'Order nr.', 'jigoshop-seb-gateway' ) . " {$order->id}";

            $VK_a['VK_SERVICE'] = '1002';              // service nr
            $VK_a['VK_VERSION'] = '008'; 
            $VK_a['VK_SND_ID']  = $this->merchant_id;  // id given for merchant
            $VK_a['VK_STAMP']   = intval($order->id);  // payment id
            $VK_a['VK_AMOUNT']  = $order->order_total; // payment amount
            $VK_a['VK_CURR']    = $currency;           // currency
            $VK_a['VK_REF']     = '';                  // reference number
            $VK_a['VK_MSG']     = $payment_message;    // payment message
            

            $VK_a['VK_MAC']     = createSignature( $VK_a );   //kontrollkood e allkiri
            
            $VK_a['VK_RETURN']  = site_url('/jigoshop/seb-callback.php');  // return url
            $VK_a['VK_CANCEL']  = get_permalink( jigoshop_get_page_id( 'cart' ) ); // returned when unsuccess

            $VK_a['VK_LANG']    = 'EST';
            $VK_a['VK_CHARSET'] = 'UTF-8';
            
            $fields = array();
            foreach( $VK_a as $VK_name => $VK_value ) {
                $fields []= '<input type="hidden" name="' . $VK_name . '" value="' . $VK_value . '"/>';
            }
            
            //$action_url = "https://pangalink.net/banklink/008/seb";
            $action_url = "https://www.seb.ee/cgi-bin/unet3.sh/un3min.r";

            return '<form method="post" action="'. $action_url .'" id="SEBform">
                        ' . implode('', $fields) . '
                        <input type="submit" class="button-alt" id="submit_SEBform" value="'.__('Pay via SEB', 'jigoshop-seb-gateway').'" /> <a class="button cancel" href="'.$order->get_cancel_order_url().'">'.__('Cancel order', 'jigoshop-seb-gateway').'</a>
                        <script type="text/javascript">
                            jQuery(function() {
                                jQuery("body").block({ 
                                    message: "<img src=\"'.jigoshop::plugin_url().'/assets/images/ajax-loader.gif\" alt=\"Redirecting...\" />'.__('Thank you for your order. We are now redirecting you to SEB to make your payment.', 'jigoshop-seb-gateway').'", 
                                    overlayCSS: { 
                                        background: "#fff", 
                                        opacity: 0.6 
                                    },
                                    css: { 
                                        padding:        20, 
                                        textAlign:      "center", 
                                        color:          "#555", 
                                        border:         "3px solid #aaa", 
                                        backgroundColor:"#fff", 
                                        cursor:         "wait" 
                                    } 
                                });
                                jQuery("#submit_SEBform").click();
                            });
                        </script>
                </form>';
        }

        /* Receipt page
        ----------------------------------------------------------- */
        function receipt_page( $order_id ) {
            echo '<p>' . __( 'Thank you for your order, please click the button below to pay with SEB.', 'jigoshop-seb-gateway') . '</p>';
            echo $this->generate_form( $order_id );
        }
	
		/* Process order 
		------------------------------------------------------------ */
		function process_payment( $order_id ) {
			$order = &new jigoshop_order( $order_id );
	
            return array(
                'result'   => 'success',
                'redirect' => add_query_arg( 'order', $order->id, add_query_arg( 'key', $order->order_key, get_permalink( jigoshop_get_page_id( 'pay' ) ) ) )
            );
	
			/*// By default, mark as processing, but can be filtered for any mark
			$order->update_status( apply_filters( 'tgm_jigoshop_order_update_status', __( 'processing', 'Your order is being processed. Thank you!' ) ) );
		
			// Remove cart
			jigoshop_cart::empty_cart();
			
			// Return thankyou redirect
			return array(
				'result' 	=> 'success',
				'redirect'	=> add_query_arg( 'key', $order->order_key, add_query_arg( 'order', $order_id, get_permalink( get_option( 'jigoshop_thanks_page_id' ) ) ) )
			);*/
		
		}
	

    function check_callback() {
        if ( strpos($_SERVER["REQUEST_URI"], '/jigoshop/seb-callback.php') !== false ) {
            $_POST = stripslashes_deep($_POST);
            do_action("valid_seb_callback", $_POST);
        }
    }

    function successful_request( $posted ){
        
        function _padIt( $str = ""){
            return str_pad( strlen( $str ), 3, "0", STR_PAD_LEFT) . $str;
        }               
        
        function _readPubKey(){
            $key_file = plugins_url( 'cert.pem' , __FILE__ );
            $fp = fopen( $key_file, "r" );
            $cert = fread( $fp, 8192 );
            fclose( $fp );
            return $cert;
        }
                
        function verifySignature( $VK_a){
            $VK_MAC = $VK_a['VK_MAC'];
            $signature = base64_decode( $VK_MAC );
            switch( $VK_a['VK_SERVICE'] ){
                case '1101':
                    $data = 
                        _padIt( $VK_a['VK_SERVICE'] ) .
                        _padIt( $VK_a['VK_VERSION'] ) .
                        _padIt( $VK_a['VK_SND_ID'] ) .
                        _padIt( $VK_a['VK_REC_ID'] ) .
                        _padIt( $VK_a['VK_STAMP'] ) .
                        _padIt( $VK_a['VK_T_NO'] ) .
                        _padIt( $VK_a['VK_AMOUNT'] ) .
                        _padIt( $VK_a['VK_CURR'] ) .
                        _padIt( $VK_a['VK_REC_ACC'] ) .
                        _padIt( $VK_a['VK_REC_NAME'] ) .
                        _padIt( $VK_a['VK_SND_ACC'] ) .
                        _padIt( $VK_a['VK_SND_NAME'] ) .
                        _padIt( $VK_a['VK_REF'] ) .
                        _padIt( $VK_a['VK_MSG'] ) .
                        _padIt( $VK_a['VK_T_DATE'] );
                    break;
                case '1901':
                    $data =
                        _padIt( $VK_a['VK_SERVICE'] ) .
                        _padIt( $VK_a['VK_VERSION'] ) .
                        _padIt( $VK_a['VK_SND_ID'] ) .
                        _padIt( $VK_a['VK_REC_ID'] ) .
                        _padIt( $VK_a['VK_STAMP'] ) .
                        _padIt( $VK_a['VK_REF'] ) .
                        _padIt( $VK_a['VK_MSG'] );
                    break;  
            }
            $cert = _readPubKey();
            $pubkey = openssl_get_publickey( $cert );
            $out = openssl_verify( $data, $signature, $pubkey );
            openssl_free_key( $pubkey );
            return $out;
                
        }
                    
        $sig_result = verifySignature( $posted );
        
        $order = new jigoshop_order( (int) $posted['VK_STAMP'] );
        
        $redirect_url = get_permalink( jigoshop_get_page_id( 'cart' ) ); 
        
        switch( $sig_result ){
            case 1:
                switch($posted['VK_SERVICE'] ) {
                    case '1101':
                        $order->add_order_note( __('SEB payment completed', 'jigoshop-seb-gateway') );
                        $order->payment_complete();
                        jigoshop_cart::empty_cart();
                        upload_order_data_to_compucash($order);

                        $redirect_url = add_query_arg( 'key', $order->order_key, add_query_arg( 'order', $order_id, get_permalink( jigoshop_get_page_id('thanks') ) ) );

                        break;
                    case '1901':
                        $order->update_status('cancelled', __('SEB payment cancelled', 'jigoshop-seb-gateway'));
                        break;
                    default:
                        error_log('doubleFeil');
                        break;  
                }
                break;
            case 0:
                $order->add_order_note( __('Some error occured in communication with SEB', 'jigoshop-seb-gateway') );
                break;
            default:
                $order->add_order_note( __('Some error occured with SEB', 'jigoshop-seb-gateway') );
                break;  
        }

        wp_safe_redirect($redirect_url);

        /*return array(
            'result'    => 'success',
            'redirect'  => add_query_arg( 'key', $order->order_key, add_query_arg( 'order', $order_id, get_permalink( get_option( 'jigoshop_thanks_page_id' ) ) ) )
        );*/

        exit;
    
    } 

    }

	/* Add seb payment gateway to the Jigoshop gateways 
	------------------------------------------------------------ */
    add_filter( 'jigoshop_payment_gateways', 'add_jigoshop_seb_payment_gateway' );
	function add_jigoshop_seb_payment_gateway( $methods ) {
        $methods[] = 'jigoshop_seb_gateway'; 
        return $methods;
	}
	
}