#include "stack.h"                                                                        

using namespace std;

template <class NodeType>
bool Stack<NodeType>::push(const NodeType& tmp)
{
    bool status = false;

    if (this -> length == 0 || this -> info -> getQty() < this -> length)
    {   
        this -> info -> append(tmp);
        this -> top = this -> info -> end;
    }   

    if (this -> top == tmp)
    {   
        status = true;
    }   

    return (status);

}

template <class NodeType>
bool Stack<NodeType>::push(int value)
{
    bool status = false;

    if (this -> length == 0 || this -> info -> getQty() < this -> length)
    {
        this -> info -> append(value);
        this -> top = this -> info -> end;
    }

    if (this -> top -> getValue() == value)
    {
        status = true;
    }

    return (status);
}

template <class NodeType>
NodeType* Stack<NodeType>::pop()
{
    NodeType* tmp = this -> top;

    if (this -> top != NULL)
    {

        if (this -> top -> getPrev() == NULL)
        {
            //tmp = this  ->  top;
            this -> top = NULL;
        }
        else
        {
            //tmp = this  ->  top;
            this -> top = this -> top -> getPrev();
            this -> top -> setNext(NULL);
            tmp -> setNext(NULL);
            tmp -> setPrev(NULL);
        }
    }

    this -> info -> setQty((this -> info -> getQty()) - 1);

    return (tmp);
}

template <class NodeType>
NodeType* Stack<NodeType>::peek()
{
    return (this -> top);
}