pica/utils/helpers.h

//SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
//SPDX-License-Identifier: GPL-3.0-or-later

#pragma once

#include <filesystem>
#include <string>
#include <algorithm>

#define UNUSED(variable) (void)variable

void initPaths(const char* programPath);
const std::filesystem::path& sharedPath();
bool endsWith(const std::string& string, const std::string& query);
void ltrim(std::string& string);
void rtrim(std::string& string);
void trim(std::string& string);
std::string extract(std::string& string, std::string::size_type begin, std::string::size_type end);

template <class T>
struct FirstGreater {
    bool operator () (const T& left, const T& right) {
        return std::get<0>(left) > std::get<0>(right);
    }
};

template <class Type, class Container, class Compare = std::less<Type>>
class PriorityQueue {
public:
    explicit PriorityQueue(const Compare& compare = Compare()):
        container(),
        compare(compare)
    {}

    const Type& top () const {
        return container.front();
    }

    bool empty () const {
        return container.empty();
    }

    template<class... Args>
    void emplace (Args&&... args) {
        container.emplace_back(std::forward<Args>(args)...);
        std::push_heap(container.begin(), container.end(), compare);
    }

    void push (const Type& element) {
        container.push_back(element);
        std::push_heap(container.begin(), container.end(), compare);
    }

    void push (Type&& element) {
        container.push_back(std::move(element));
        std::push_heap(container.begin(), container.end(), compare);
    }

    Type pop () {
        std::pop_heap(container.begin(), container.end(), compare);
        Type result = std::move(container.back());
        container.pop_back();
        return result;
    }

private:
    Container container;
    Compare compare;
};