InstantiateContract.hpp

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/************************************************************
 *
 *  InstantiateContract.hpp
 *
 */

/************************************************************
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 Hash: SHA1

 *                 OPEN TRANSACTIONS
 *
 *       Financial Cryptography and Digital Cash
 *       Library, Protocol, API, Server, CLI, GUI
 *
 *       -- Anonymous Numbered Accounts.
 *       -- Untraceable Digital Cash.
 *       -- Triple-Signed Receipts.
 *       -- Cheques, Vouchers, Transfers, Inboxes.
 *       -- Basket Currencies, Markets, Payment Plans.
 *       -- Signed, XML, Ricardian-style Contracts.
 *       -- Scripted smart contracts.
 *
 *  Copyright (C) 2010-2013 by "Fellow Traveler" (A pseudonym)
 *
 *  EMAIL:
 *  [email protected]
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 *  BITCOIN:  1NtTPVVjDsUfDWybS4BwvHpG2pdS9RnYyQ
 *
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 *  9DD5 90EB 9292 4B48 0484  7910 0308 00ED F951 BB8E
 *
 *  OFFICIAL PROJECT WIKI(s):
 *  https://github.com/FellowTraveler/Moneychanger
 *  https://github.com/FellowTraveler/Open-Transactions/wiki
 *
 *  WEBSITE:
 *  http://www.OpenTransactions.org/
 *
 *  Components and licensing:
 *   -- Moneychanger..A Java client GUI.....LICENSE:.....GPLv3
 *   -- otlib.........A class library.......LICENSE:...LAGPLv3
 *   -- otapi.........A client API..........LICENSE:...LAGPLv3
 *   -- opentxs/ot....Command-line client...LICENSE:...LAGPLv3
 *   -- otserver......Server Application....LICENSE:....AGPLv3
 *  Github.com/FellowTraveler/Open-Transactions/wiki/Components
 *
 *  All of the above OT components were designed and written by
 *  Fellow Traveler, with the exception of Moneychanger, which
 *  was contracted out to Vicky C ([email protected]).
 *  The open-source community has since actively contributed.
 *
 *  -----------------------------------------------------
 *
 *   LICENSE:
 *   This program is free software: you can redistribute it
 *   and/or modify it under the terms of the GNU Affero
 *   General Public License as published by the Free Software
 *   Foundation, either version 3 of the License, or (at your
 *   option) any later version.
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 *   ADDITIONAL PERMISSION under the GNU Affero GPL version 3
 *   section 7: (This paragraph applies only to the LAGPLv3
 *   components listed above.) If you modify this Program, or
 *   any covered work, by linking or combining it with other
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 *   the Open-Transactions code itself.
 *
 *   Lucre License:
 *   This code is also "dual-license", meaning that Ben Lau-
 *   rie's license must also be included and respected, since
 *   the code for Lucre is also included with Open Transactions.
 *   See Open-Transactions/src/otlib/lucre/LUCRE_LICENSE.txt
 *   The Laurie requirements are light, but if there is any
 *   problem with his license, simply remove the Lucre code.
 *   Although there are no other blind token algorithms in Open
 *   Transactions (yet. credlib is coming), the other functions
 *   will continue to operate.
 *   See Lucre on Github:  https://github.com/benlaurie/lucre
 *   -----------------------------------------------------
 *   You should have received a copy of the GNU Affero General
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 *   (Unfortunately many will run anonymously and untraceably,
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 *   DISCLAIMER:
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 *   useful, but WITHOUT ANY WARRANTY; without even the implied
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 *   PURPOSE.  See the GNU Affero General Public License for
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#ifndef OPENTXS_EXT_INSTANTIATECONTRACT_HPP
#define OPENTXS_EXT_INSTANTIATECONTRACT_HPP

// Factory (though rarely used; was just added recently for the API.)
//
// If you want to instantiate a contract that you already have in string form,
// this function will figure out what kind of contract it is, and instantiate
// the
// right subclass, then load it up and return it.
//
// CALLER IS RESPONSIBLE to cleanup!

#include "opentxs/cash/Mint.hpp"
#include "opentxs/cash/Token.hpp"
#include "opentxs/core/recurring/OTPaymentPlan.hpp"
#include "opentxs/core/crypto/OTSignedFile.hpp"
#include "opentxs/core/script/OTSmartContract.hpp"
#include "opentxs/core/trade/OTOffer.hpp"
#include "opentxs/core/trade/OTTrade.hpp"
#include "opentxs/core/util/Assert.hpp"
#include "opentxs/core/OTLog.hpp"
#include "opentxs/core/OTContract.hpp"
#include "opentxs/core/OTAssetContract.hpp"
#include "opentxs/core/OTCheque.hpp"
#include "opentxs/core/OTMessage.hpp"
#include "opentxs/core/OTServerContract.hpp"

namespace
{

opentxs::OTContract* InstantiateContract(opentxs::OTString strInput)
{

    using namespace opentxs;
    OTString strContract, strFirstLine; // output for the below function.
    const bool bProcessed =
        OTContract::DearmorAndTrim(strInput, strContract, strFirstLine);

    if (bProcessed) {

        OTContract* pContract = nullptr;

        if (strFirstLine.Contains(
                "-----BEGIN SIGNED SMARTCONTRACT-----")) // this string is 36
                                                         // chars long.
        {
            pContract = new OTSmartContract();
            OT_ASSERT(nullptr != pContract);
        }

        if (strFirstLine.Contains(
                "-----BEGIN SIGNED PAYMENT PLAN-----")) // this string is 35
                                                        // chars long.
        {
            pContract = new OTPaymentPlan();
            OT_ASSERT(nullptr != pContract);
        }
        else if (strFirstLine.Contains(
                       "-----BEGIN SIGNED TRADE-----")) // this string is 28
                                                        // chars long.
        {
            pContract = new OTTrade();
            OT_ASSERT(nullptr != pContract);
        }
        else if (strFirstLine.Contains("-----BEGIN SIGNED OFFER-----")) {
            pContract = new OTOffer();
            OT_ASSERT(nullptr != pContract);
        }
        else if (strFirstLine.Contains("-----BEGIN SIGNED INVOICE-----")) {
            pContract = new OTCheque();
            OT_ASSERT(nullptr != pContract);
        }
        else if (strFirstLine.Contains("-----BEGIN SIGNED VOUCHER-----")) {
            pContract = new OTCheque();
            OT_ASSERT(nullptr != pContract);
        }
        else if (strFirstLine.Contains("-----BEGIN SIGNED CHEQUE-----")) {
            pContract = new OTCheque();
            OT_ASSERT(nullptr != pContract);
        }
        else if (strFirstLine.Contains("-----BEGIN SIGNED MESSAGE-----")) {
            pContract = new OTMessage();
            OT_ASSERT(nullptr != pContract);
        }
        else if (strFirstLine.Contains("-----BEGIN SIGNED MINT-----")) {
            pContract = Mint::MintFactory();
            OT_ASSERT(nullptr != pContract);
        }
        else if (strFirstLine.Contains("-----BEGIN SIGNED FILE-----")) {
            pContract = new OTSignedFile();
            OT_ASSERT(nullptr != pContract);
        }
        else if (strFirstLine.Contains("-----BEGIN SIGNED CASH-----")) {
            pContract = Token::LowLevelInstantiate(strFirstLine);
            OT_ASSERT(nullptr != pContract);
        }
        else if (strFirstLine.Contains("-----BEGIN SIGNED CASH TOKEN-----")) {
            pContract = Token::LowLevelInstantiate(strFirstLine);
            OT_ASSERT(nullptr != pContract);
        }
        else if (strFirstLine.Contains(
                       "-----BEGIN SIGNED LUCRE CASH TOKEN-----")) {
            pContract = Token::LowLevelInstantiate(strFirstLine);
            OT_ASSERT(nullptr != pContract);
        }

        // TODO: Might want to clarify in Asset and Server Contracts,
        // so I don't have to do this crap... The ones above are cleaner.
        //
        else if (strFirstLine.Contains("-----BEGIN SIGNED CONTRACT-----")) {
            if (strContract.Contains(
                    "<notaryProviderContract version=\"1.0\">")) {
                pContract = new OTServerContract();
                OT_ASSERT(nullptr != pContract);
            }
            else if (strContract.Contains(
                           "<digitalAssetContract version=\"1.0\">")) {
                pContract = new OTAssetContract();
                OT_ASSERT(nullptr != pContract);
            }
        }

        // The string didn't match any of the options in the factory.
        //
        if (nullptr == pContract)
            otOut << __FUNCTION__
                  << ": Object type not yet supported by class factory: "
                  << strFirstLine << "\n";
        // Does the contract successfully load from the string passed in?
        else if (!pContract->LoadContractFromString(strContract)) {
            otOut << __FUNCTION__
                  << ": Failed loading contract from string (first line): "
                  << strFirstLine << "\n";
            delete pContract;
            pContract = nullptr;
        }
        else
            return pContract;
    }
    return nullptr;
}

} // unnamed namespace

#endif // OPENTXS_EXT_INSTANTIATECONTRACT_HPP