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 /*
     SPDX-FileCopyrightText: 2018 Volker Krause <vkrause@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #pragma once
 
 #include "kitinerary_export.h"
 
 #include <QVariant>
 
 #include <functional>
 
 namespace KItinerary {
 class Flight;
 class Person;
 
 /** Utilities for merging reservations or elements of them. */
 class MergeUtil
 {
 public:
     /**
      *  Checks if two Reservation or Trip values refer to the same booking element.
      *
      *  This does not mean being exactly equal, but having matching identifying properties.
      *  What this means exactly depends on the data type:
      *  - Flights: booking reference, flight number and departure day match
      *  - Train trip: booking reference, train number and departure day match
      *  - Bus trip: booking ref and/or number and departure time match
      *  - Hotel booking: hotel name, booking reference and checkin day match
      *
      *  For all reservation types, the Reservation::underName property is
      *  checked and either needs to be equal or absent in one of the values.
      */
     KITINERARY_EXPORT static bool isSame(const QVariant &lhs, const QVariant &rhs);
 
     /**
      * Checks if two Person objects refer to the same person.
      *
      * Essentially a case-insensitive comparison of the name components.
      */
     KITINERARY_EXPORT static bool isSamePerson(const Person &lhs, const Person &rhs);
 
     /**
      *  Checks whether to elements refer to the same thing, just for different people.
      *  For example two reservations for the same trip or event, but with separate tickets
      *  for different attendees.
      *  This is useful for batching elements together.
      *  @since 5.23.41
      */
     KITINERARY_EXPORT static bool isSameIncidence(const QVariant &lhs, const QVariant &rhs);
 
     /**
      * Checks whether two transport reservation elements refer to the same departure.
      * This considers time, location and mode of transport.
      */
     static bool hasSameDeparture(const QVariant &lhs, const QVariant &rhs);
 
     /**
      * Checks whether two transport reservation elements refer to the same arrival.
      * This considers time, location and mode of transport.
      */
     static bool hasSameArrival(const QVariant &lhs, const QVariant &rhs);
 
     /**
      * Merge the two given objects.
      * This is the same as JsonLdDocument::apply in most cases, but if one side
      * can be determined to be "better", that one is preferred.
      */
     KITINERARY_EXPORT static QVariant merge(const QVariant &lhs, const QVariant &rhs);
 
     /** Register a comparator function for a custom type that will be used by isSame. */
     template <typename T>
     inline static void registerComparator(bool(*func)(const T&, const T&))
     {
         std::function<bool(const QVariant&, const QVariant &)> f([func](const QVariant &lhs, const QVariant &rhs) -> bool {
             return (*func)(lhs.value<T>(), rhs.value<T>());
         });
         registerComparator(qMetaTypeId<T>(), std::move(f));
     }
 
 private:
     KITINERARY_EXPORT static void registerComparator(int metaTypeId, std::function<bool(const QVariant&, const QVariant &)> &&func);
 };
 
 }