osrm-backend/include/engine/api/table_parameters.hpp

/*

Copyright (c) 2017, Project OSRM contributors
All rights reserved.

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are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list
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list of conditions and the following disclaimer in the documentation and/or
other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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*/

#ifndef ENGINE_API_TABLE_PARAMETERS_HPP
#define ENGINE_API_TABLE_PARAMETERS_HPP

#include "engine/api/base_parameters.hpp"

#include <cstddef>

#include <algorithm>
#include <iterator>
#include <vector>

namespace osrm
{
namespace engine
{
namespace api
{

/**
 * Parameters specific to the OSRM Table service.
 *
 * Holds member attributes:
 *  - sources: indices into coordinates indicating sources for the Table service, no sources means
 *             use all coordinates as sources
 *  - destinations: indices into coordinates indicating destinations for the Table service, no
 *                  destinations means use all coordinates as destinations
 *
 * \see OSRM, Coordinate, Hint, Bearing, RouteParame, RouteParameters, TableParameters,
 *      NearestParameters, TripParameters, MatchParameters and TileParameters
 */
struct TableParameters : public BaseParameters
{
    std::vector<std::size_t> sources;
    std::vector<std::size_t> destinations;
    double fallback_speed = INVALID_FALLBACK_SPEED;

    enum class FallbackCoordinateType
    {
        Input = 0,
        Snapped = 1
    };

    FallbackCoordinateType fallback_coordinate_type = FallbackCoordinateType::Input;

    enum class AnnotationsType
    {
        None = 0,
        Duration = 0x01,
        Distance = 0x02,
        All = Duration | Distance
    };

    AnnotationsType annotations = AnnotationsType::Duration;

    double scale_factor = 1;

    TableParameters() = default;
    template <typename... Args>
    TableParameters(std::vector<std::size_t> sources_,
                    std::vector<std::size_t> destinations_,
                    Args... args_)
        : BaseParameters{std::forward<Args>(args_)...}, sources{std::move(sources_)},
          destinations{std::move(destinations_)}
    {
    }

    template <typename... Args>
    TableParameters(std::vector<std::size_t> sources_,
                    std::vector<std::size_t> destinations_,
                    const AnnotationsType annotations_,
                    Args... args_)
        : BaseParameters{std::forward<Args>(args_)...}, sources{std::move(sources_)},
          destinations{std::move(destinations_)}, annotations{annotations_}
    {
    }

    template <typename... Args>
    TableParameters(std::vector<std::size_t> sources_,
                    std::vector<std::size_t> destinations_,
                    const AnnotationsType annotations_,
                    double fallback_speed_,
                    FallbackCoordinateType fallback_coordinate_type_,
                    double scale_factor_,
                    Args... args_)
        : BaseParameters{std::forward<Args>(args_)...}, sources{std::move(sources_)},
          destinations{std::move(destinations_)}, fallback_speed{fallback_speed_},
          fallback_coordinate_type{fallback_coordinate_type_}, annotations{annotations_},
          scale_factor{scale_factor_}

    {
    }

    bool IsValid() const
    {
        if (!BaseParameters::IsValid())
            return false;

        // Distance Table makes only sense with 2+ coodinates
        if (coordinates.size() < 2)
            return false;

        // 1/ The user is able to specify duplicates in srcs and dsts, in that case it's their fault

        // 2/ 0 <= index < len(locations)
        const auto not_in_range = [this](const std::size_t x) { return x >= coordinates.size(); };

        if (std::any_of(begin(sources), end(sources), not_in_range))
            return false;

        if (std::any_of(begin(destinations), end(destinations), not_in_range))
            return false;

        if (fallback_speed <= 0)
            return false;

        if (scale_factor <= 0)
            return false;

        return true;
    }
};
inline bool operator&(TableParameters::AnnotationsType lhs, TableParameters::AnnotationsType rhs)
{
    return static_cast<bool>(
        static_cast<std::underlying_type_t<TableParameters::AnnotationsType>>(lhs) &
        static_cast<std::underlying_type_t<TableParameters::AnnotationsType>>(rhs));
}

inline TableParameters::AnnotationsType operator|(TableParameters::AnnotationsType lhs,
                                                  TableParameters::AnnotationsType rhs)
{
    return (TableParameters::AnnotationsType)(
        static_cast<std::underlying_type_t<TableParameters::AnnotationsType>>(lhs) |
        static_cast<std::underlying_type_t<TableParameters::AnnotationsType>>(rhs));
}

inline TableParameters::AnnotationsType &operator|=(TableParameters::AnnotationsType &lhs,
                                                    TableParameters::AnnotationsType rhs)
{
    return lhs = lhs | rhs;
}
}
}
}

#endif // ENGINE_API_TABLE_PARAMETERS_HPP