/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_realpath.c                                      :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: tmaze <tmaze@student.42.fr>                +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2019/01/27 14:42:35 by tmaze             #+#    #+#             */
/*   Updated: 2019/01/27 15:35:06 by tmaze            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "minishell.h"

char	*ft_tabtopath(char **tab_path)
{
	size_t	total_size;
	size_t	i;
	char	*ret;

	i = 0;
	total_size = 0;
	while (tab_path[i])
		total_size += ft_strlen(tab_path[i++]);
	if ((ret = ft_strnew(total_size + i)) == NULL)
		return (NULL);
	i = 0;
	while (tab_path[i])
	{
		ft_strcat(ret, "/");
		ft_strcat(ret, tab_path[i++]);
	}
	return (ret);
}

char	*ft_realpath(char *r_path, char **a_path)
{
	char	**tab_path;
	size_t	i;
	size_t	j;
	int		strcmp;

	i = 0;
	if ((tab_path = ft_strsplit(r_path, '/')) == NULL)
		return (NULL);
	while (tab_path[i])
	{
		if ((strcmp = ft_strcmp(tab_path[i], "..")) == 0
			|| ft_strcmp(tab_path[i], ".") == 0 || (strcmp == 0 && i == 0))
		{
			j = i;
			if (strcmp == 0 && i != 0)
				i = i - 1;
			ft_strdel(&(tab_path[i]));
			if (strcmp == 0 && i != 0)
				ft_strdel(&(tab_path[j]));
			while (tab_path[++j])
				tab_path[j - ((strcmp == 0 && i != 0) ? 2 : 1)] = tab_path[j];
			if (strcmp == 0 && i != 0)
				tab_path[j - 2] = NULL;
			tab_path[j - 1] = NULL;
		}
		else
			i++;
	}
	*a_path = ft_tabtopath(tab_path);
	ft_del_words_tables(&tab_path);
	return (*a_path);
}