Filter for 2+ parametrs (u wanna change)

#include <iostream>
#include <string>
using namespace std;

string List::filter(std::string _type, int _cond, int _wifi)
{
	if (size() > 0)
	{
		string print = "";
		int numOfStr = 1;
		unsigned int maxOfElInStr = 0;
		
		for (auto ptr = begin(); ptr != end();)
		{
			ElementIDK *temp = ptr;

			// Filter by the first argument (string)
			if (ptr->get_Type() == _type)
			{
				
				temp = ptr;
			}
			else if(_type == "")
			{
				temp = ptr;
			}
			else
			{
				temp = NULL;
			}

			// Filter by the second argument (int)
			if(_cond != 2 && temp != NULL)
			{
				if (ptr->get_smthngOne() == _cond)
				{
					temp = ptr;
				}
				else
				{
					temp = NULL;
				}
			}
			else if (_cond == 2 && temp != NULL)
			{
				temp = ptr;
			}

			// Filter by the third argument (int)
			if(_wifi != 2 && temp != NULL)
			{
				if (ptr->get_smthngTwo() == _wifi)
				{
					temp = ptr;
				}
				else
				{
					temp = NULL;
				}
			}
			else if (_wifi == 2 && temp != NULL)
			{
				temp = ptr;
			}
			
			// Find the maximum number of elements in a string
			for (auto ptr = begin(); ptr != end();)
			{
				string numOfElInStr = ptr->get_TypeOfRC();
				if (maxOfElInStr < numOfElInStr.size())
				{
					maxOfElInStr = numOfElInStr.size();
				}
				ptr = ptr->next;
			}

			string Type = ptr->get_Type();
            
            // To dynamically display the list
			for (Type.size(); Type.size() < maxOfElInStr;)
			{
				Type = Type + " ";
			}
			
			// If the object is not NULL - display it
			if (temp != NULL)
			{
				print = print + " " + to_string(numOfStr) + ". " + " + _type + _cond + _wifi;
			}
			numOfStr++;
			ptr = ptr->next;
		}
		return print;
	}
	else
	{
		return "There are no items matching the filter in the list.";
	}
}