/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_b_cd.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: rbousset <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/02/14 17:19:27 by rbousset          #+#    #+#             */
/*   Updated: 2020/02/14 17:19:29 by rbousset         ###   ########lyon.fr   */
/*                                                                            */
/* ************************************************************************** */

#include <libft.h>
#include <stdint.h>
#include <unistd.h>

#include "ft_f_fail.h"
#include "ft_s_destroy.h"
#include "ft_s_struct.h"
#include "ft_u_utils.h"
#include "ft_u_vars.h"

static void
	ft_set_path(char **path,
				char *args[],
				t_msh *msh)
{
	if (!(*path = ft_strdup(*args)))
	{
		ft_s_destroy(msh);
		ft_fail_alloc(msh);
	}
	if (!ft_strncmp("~/", *path, 2) || !ft_strncmp("~", *path, 2))
	{
		if (!(*path = ft_strsubst(*path,
			"~", ft_subst_var_value("$HOME", msh))))
		{
			ft_s_destroy(msh);
			ft_fail_alloc(msh);
		}
	}
}

uint8_t
	ft_b_cd(char *args[],
			t_msh *msh)
{
	const uint64_t	argc = ft_get_argc((const char**)args);
	char			*path;

	if (argc >= 2)
	{
		ft_fail_too_many_args("cd", msh);
		return (1);
	}
	else if (argc == 0)
	{
		if (!(path = ft_subst_var_value("$HOME", msh)))
			return (1);
	}
	else
		ft_set_path(&path, args, msh);
	if (chdir(path) != 0)
	{
		ft_fail_chd("cd", path, msh);
		ft_memdel((void*)&path);
		return (1);
	}
	ft_memdel((void*)&msh->cwd);
	msh->cwd = getcwd(NULL, 0);
	ft_memdel((void*)&path);
	return (0);
}