Node.hpp

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/***      ______  ____  ______                 _         ***/
/***     / ___\ \/ /\ \/ / ___|_ __ __ _ _ __ | |__      ***/
/***    | |    \  /  \  / |  _| '__/ _` | '_ \| '_ \     ***/
/***    | |___ /  \  /  \ |_| | | | (_| | |_) | | | |    ***/
/***     \____/_/\_\/_/\_\____|_|  \__,_| .__/|_| |_|    ***/
/***                                    |_|              ***/
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/***     Header-Only C++ Library for Graph               ***/
/***     Representation and Algorithms                   ***/
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/***     Author: ZigRazor                                ***/
/***     E-Mail: zigrazor@gmail.com                      ***/
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/***     Collaboration: -----------                      ***/
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/***     License: MPL v2.0                              ***/
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#ifndef __CXXGRAPH_NODE_H__
#define __CXXGRAPH_NODE_H__
 
#pragma once
#include <iostream>
#include <openssl/sha.h>
#include <iomanip>
 
 
namespace CXXGRAPH
{
    template <typename T>
    class Node; 
    template <typename T>
    std::ostream &operator<<(std::ostream &os, const Node<T> &node);
    template <typename T>
    class Node
    {
    private:
        std::size_t id = 0;
        std::string userId = "";
        T data;
        void setId(std::string_view);
 
    public:
        Node(std::string_view, const T &data);
        ~Node() = default;
        const std::size_t &getId() const;
        const std::string &getUserId() const;
        const T &getData() const;
        //operator
        bool operator==(const Node<T> &b) const;
        bool operator<(const Node<T> &b) const;
        friend std::ostream &operator<<<>(std::ostream &os, const Node<T> &node);
    };
 
    template <typename T>
    Node<T>::Node(std::string_view id, const T &data)
    {
        this->userId = id;
        // the userid is set as sha512 hash of the user provided id
        setId(id);
        this->data = data;
    }
 
    template <typename T>
    void Node<T>::setId(std::string_view inpId)
    {
        //const unsigned char* userId = reinterpret_cast<const unsigned char *>((*inpId).c_str() );
        //unsigned char obuf[64];
        //unsigned long long obuf[8];
        //SHA512(userId, (*inpId).length(), reinterpret_cast<unsigned char*>(obuf));
        this->id = std::hash<std::string_view>{}(inpId);
        
    }   
 
    template <typename T>
    const std::size_t &Node<T>::getId() const
    {
        return id;
    }
 
    template <typename T>
    const std::string &Node<T>::getUserId() const
    {
        return userId;
    }
 
    template <typename T>
    const T &Node<T>::getData() const
    {
        return data;
    }
 
    template <typename T>
    bool Node<T>::operator==(const Node<T> &b) const
    {
        return (this->id == b.id && this->data == b.data);
    }
 
    template <typename T>
    bool Node<T>::operator<(const Node<T> &b) const
    {
        return (this->id < b.id);
    }
 
 
    //ostream overload
    template <typename T>
    std::ostream &operator<<(std::ostream &os, const Node<T> &node)
    {
        os << "Node: {\n"
           << "  Id:\t" << node.userId << "\n  Data:\t" << node.data << "\n}";
        return os;
    }
}
 
#endif // __CXXGRAPH_NODE_H__