PathSet.h

//------------------------------------------------------------------------------
/*
  This file is part of rippled: https://github.com/ripple/rippled
  Copyright (c) 2012-2015 Ripple Labs Inc.
 
  Permission to use, copy, modify, and/or distribute this software for any
  purpose  with  or without fee is hereby granted, provided that the above
  copyright notice and this permission notice appear in all copies.
 
  THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
  MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
  ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
 
#ifndef RIPPLE_LEDGER_TESTS_PATHSET_H_INCLUDED
#define RIPPLE_LEDGER_TESTS_PATHSET_H_INCLUDED
 
#include <ripple/basics/Log.h>
#include <ripple/protocol/TxFlags.h>
#include <test/jtx.h>
 
namespace ripple {
namespace test {
 
inline std::size_t
countOffers(
    jtx::Env& env,
    jtx::Account const& account,
    Issue const& takerPays,
    Issue const& takerGets)
{
    size_t count = 0;
    forEachItem(
        *env.current(), account, [&](std::shared_ptr<SLE const> const& sle) {
            if (sle->getType() == ltOFFER &&
                sle->getFieldAmount(sfTakerPays).issue() == takerPays &&
                sle->getFieldAmount(sfTakerGets).issue() == takerGets)
                ++count;
        });
    return count;
}
 
inline std::size_t
countOffers(
    jtx::Env& env,
    jtx::Account const& account,
    STAmount const& takerPays,
    STAmount const& takerGets)
{
    size_t count = 0;
    forEachItem(
        *env.current(), account, [&](std::shared_ptr<SLE const> const& sle) {
            if (sle->getType() == ltOFFER &&
                sle->getFieldAmount(sfTakerPays) == takerPays &&
                sle->getFieldAmount(sfTakerGets) == takerGets)
                ++count;
        });
    return count;
}
 
inline bool
isOffer(
    jtx::Env& env,
    jtx::Account const& account,
    STAmount const& takerPays,
    STAmount const& takerGets)
{
    return countOffers(env, account, takerPays, takerGets) > 0;
}
 
inline bool
isOffer(
    jtx::Env& env,
    jtx::Account const& account,
    Issue const& takerPays,
    Issue const& takerGets)
{
    return countOffers(env, account, takerPays, takerGets) > 0;
}
 
class Path
{
public:
    STPath path;
 
    Path() = default;
    Path(Path const&) = default;
    Path&
    operator=(Path const&) = default;
    Path(Path&&) = default;
    Path&
    operator=(Path&&) = default;
 
    template <class First, class... Rest>
    explicit Path(First&& first, Rest&&... rest)
    {
        addHelper(std::forward<First>(first), std::forward<Rest>(rest)...);
    }
    Path&
    push_back(Issue const& iss);
    Path&
    push_back(jtx::Account const& acc);
    Path&
    push_back(STPathElement const& pe);
    Json::Value
    json() const;
 
private:
    template <class First, class... Rest>
    void
    addHelper(First&& first, Rest&&... rest);
};
 
inline Path&
Path::push_back(STPathElement const& pe)
{
    path.emplace_back(pe);
    return *this;
}
 
inline Path&
Path::push_back(Issue const& iss)
{
    path.emplace_back(
        STPathElement::typeCurrency | STPathElement::typeIssuer,
        beast::zero,
        iss.currency,
        iss.account);
    return *this;
}
 
inline Path&
Path::push_back(jtx::Account const& account)
{
    path.emplace_back(account.id(), beast::zero, beast::zero);
    return *this;
}
 
template <class First, class... Rest>
void
Path::addHelper(First&& first, Rest&&... rest)
{
    push_back(std::forward<First>(first));
    if constexpr (sizeof...(rest) > 0)
        addHelper(std::forward<Rest>(rest)...);
}
 
inline Json::Value
Path::json() const
{
    return path.getJson(JsonOptions::none);
}
 
class PathSet
{
public:
    STPathSet paths;
 
    PathSet() = default;
    PathSet(PathSet const&) = default;
    PathSet&
    operator=(PathSet const&) = default;
    PathSet(PathSet&&) = default;
    PathSet&
    operator=(PathSet&&) = default;
 
    template <class First, class... Rest>
    explicit PathSet(First&& first, Rest&&... rest)
    {
        addHelper(std::forward<First>(first), std::forward<Rest>(rest)...);
    }
    Json::Value
    json() const
    {
        Json::Value v;
        v["Paths"] = paths.getJson(JsonOptions::none);
        return v;
    }
 
private:
    template <class First, class... Rest>
    void
    addHelper(First first, Rest... rest)
    {
        paths.emplace_back(std::move(first.path));
        if constexpr (sizeof...(rest) > 0)
            addHelper(std::move(rest)...);
    }
};
 
}  // namespace test
}  // namespace ripple
 
#endif