<?php
/**
 * The Strangecode Codebase - a general application development framework for PHP
 * For details visit the project site: <http://trac.strangecode.com/codebase/>
 * Copyright 2001-2012 Strangecode, LLC
 * 
 * This file is part of The Strangecode Codebase.
 *
 * The Strangecode Codebase is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your option)
 * any later version.
 * 
 * The Strangecode Codebase 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
 * The Strangecode Codebase. If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * MCVE.inc.php
 *
 * The MCVE class provides functions for communicating with a MCVE server.
 *
 * @author  Quinn Comendant <quinn@strangecode.com>
 * @version 1.0
 */
class MCVE {

    var $username;
    var $password;
    var $host = 'localhost';
    var $ip_port = 8333;
    var $ssl_port = 8444;
    var $ca_bundle_file = '/usr/share/ssl/certs/ca-bundle.crt';
    var $connect_method = 'ip';
    var $timeout = 10;
    var $blocking = 1;
    var $connected = false;
    var $conn;

    function MCVE($username, $password)
    {
		$app =& App::getInstance();

        // Ensure PHP was compiled with the MCVE functions.
        if (!extension_loaded('mcve')) {
            trigger_error('MCVE class instantiation failed: MCVE extension not available.', E_USER_ERROR);
        }
        if ('' == $username || '' == $password) {
            $app->logMsg(sprintf('Empty username or password provided.', null), LOG_ERR, __FILE__, __LINE__);
        }
        $this->username = $username;
        $this->password = $password;
    }

    function _connect()
    {
		$app =& App::getInstance();

        if ($this->connected) {
            return true;
        }

        // Initialize SSL structures and definitions.
        MCVE_InitEngine($this->ca_bundle_file);

        // Allocate Connection Structures
        $this->conn = MCVE_InitConn();

        // Set Connection Method and Locations
        switch ($this->connect_method) {
        case 'ip' :
            if (!MCVE_SetIP($this->conn, $this->host, $this->ip_port)) {
                $app->logMsg('Could not set method to IP.', LOG_ERR, __FILE__, __LINE__);
                return false;
            }
            break;
        case 'ssl' :
            if (!MCVE_SetSSL($this->conn, $this->host, $this->ssl_port)) {
                $app->logMsg('Could not set method to SSL.', LOG_ERR, __FILE__, __LINE__);
                return false;
            }
            break;
        case 'dropfile' :
            if (!MCVE_SetDropFile($this->conn, '/var/mcve/trans')) {
                $app->logMsg('Could not set method to dropfile.', LOG_ERR, __FILE__, __LINE__);
                return false;
            }
            break;
        default :
            $app->logMsg('Connection method not defined.', LOG_ERR, __FILE__, __LINE__);
            return false;
        }

        // Put connection into non-blocking mode, meaning that the client must
        // loop waiting for the transaction to complete. You should always specify
        // this function with your blocking preference as the default is currently
        // non-blocking, but future versions of php_mcve will default to blocking.
        if (!MCVE_SetBlocking($this->conn, $this->blocking)) {
            $app->logMsg('Could not set blocking mode.', LOG_ERR, __FILE__, __LINE__);
            return false;
        }

        // Maximum of 30s per transaction allowed. Timeout occurs on server-end, not client-end
        if (!MCVE_SetTimeout($this->conn, $this->timeout)) {
            $app->logMsg('Could not set timeout.', LOG_ERR, __FILE__, __LINE__);
            return false;
        }

        // Connect to MCVE, if there's an error, print the exact reason for connection failure
        if (!MCVE_Connect($this->conn)) {
            $error = MCVE_ConnectionError($this->conn);
            $app->logMsg("$error. Are you sure the MCVE engine is running?", LOG_ERR, __FILE__, __LINE__);
            return false;
        }

        $this->connected = true;
        return true;
    }

    function beginTrans()
    {
        if (!$this->_connect()) {
            return false;
        }
        $tid = MCVE_TransNew($this->conn); // Allocate memory for sending a transaction.
        $this->transParam($tid, MC_USERNAME, $this->username);
        $this->transParam($tid, MC_PASSWORD, $this->password);
        return $tid;
    }

    function transParam($tid, $key, $var1, $var2=null)
    {
        if (!isset($var2)) {
            return MCVE_TransParam($this->conn, $tid, $key, $var1);
        } else {
            return MCVE_TransParam($this->conn, $tid, $key, $var1, $var2);
        }

    }

    function sendTrans($tid, $type='', $hide_msg=false)
    {
		$app =& App::getInstance();

        // Finalize structuring of  to MCVE and ready it to be sent
        if (!MCVE_TransSend($this->conn, $tid)) {
            $app->logMsg('Transaction improperly structured, possibly not enough info.', LOG_ERR, __FILE__, __LINE__);
            return false;
        }

        // Perform actual communication with MCVE engine.
        // If blocking method is used, loop until transaction is complete
        if ($this->blocking != 1) {
            while (MCVE_CheckStatus($this->conn, $tid) != MCVE_DONE) {
                MCVE_Monitor($this->conn); // Perform communication on connection
                MCVE_uwait(10000); // Microsecond thread-safe sleep timer. Better than usleep()
            }
        }

        $ret_status = MCVE_ReturnStatus($this->conn, $tid);
        $ret_code = MCVE_ReturnCode($this->conn, $tid);
        $ret_text = mcve_text_code($ret_code);
        $verbiage = MCVE_TransactionText($this->conn, $tid);

        // Check to see if transaction was successful or not using a strict success/fail function
        if ($ret_status == MCVE_FAIL) {
            $app->raiseMsg(sprintf('MCVE %s failure: %s %s', $type, $ret_text, ('' == $verbiage ? '' : '(' . trim($verbiage) . ')')), MSG_WARNING, __FILE__, __LINE__);
            return false;
        } else if ($ret_status == MCVE_SUCCESS) {
            if (!$hide_msg) {
                $app->raiseMsg(sprintf(_("MCVE %s success: %s %s"), $type, $ret_text, ('' == $verbiage ? '' : '(' . trim($verbiage) . ')')), MSG_SUCCESS, __FILE__, __LINE__);
            }
            $app->logMsg(sprintf('MCVE success details. Auth: %s; Batch: %s; Item: %s; TTID: %s; AVS: %s; CV: %s.',
                MCVE_TransactionAuth($this->conn, $tid),
                MCVE_TransactionBatch($this->conn, $tid),
                MCVE_TransactionItem($this->conn, $tid),
                MCVE_TransactionID($this->conn, $tid),
                mcve_text_avs(MCVE_TransactionAVS($this->conn, $tid)),
                mcve_text_cv(MCVE_TransactionCV($this->conn, $tid))
            ), LOG_INFO, __FILE__, __LINE__);
            return true;
        } else {
            $app->logMsg(sprintf('Transaction failed. Unknown return code: %s', $ret_status), LOG_ERR, __FILE__, __LINE__);
            return false;
        }
    }

    function disconnect($tid)
    {
        if ($this->connected) {
            // Optional, clean up memory by transaction ... This is done automatically by
            // MCVE_DestroyConn though
            MCVE_DeleteTrans($this->conn, $tid);

            // Clean up and close MCVE.
            MCVE_DestroyConn($this->conn);
            MCVE_DestroyEngine();

            $this->connected = false;
        }
    }
}
// End of class.

?>