/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   builtin.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: jschaft <cecile.schaft@orange.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/06/03 12:02:45 by jschaft           #+#    #+#             */
/*   Updated: 2024/06/25 13:37:36 by mcolonna         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "include.h"

// Check if str is the name of a builtin.
// Return true if it is, false if not.
bool	is_builtin(const char *str)
{
	return (
		ft_strncmp(str, "cd", 3) == 0
		|| ft_strncmp(str, "exit", 5) == 0
//		|| ft_strncmp(str, "export", 7) == 0
		|| ft_strncmp(str, "env", 4) == 0
		|| ft_strncmp(str, "pwd", 4) == 0
//		|| ft_strncmp(str, "echo", 5) == 0
//		|| ft_strncmp(str, "unset", 6) == 0
		);
}

// Execute the builtin cd for the specified path.
// Return 0 if success, errno if error.
static int	cd_builtin(const char *path)
{
	int	r;

	r = chdir(path);
	if (r)
	{
		perror("cd");
		return (errno);
	}
	return (0);
}

//Execute the builtin pwd for the current directory.
// Return 0 for the sake of returning something for exec_builtin
static int	pwd_builtin(void)
{
	char	*str;

	str = getcwd(NULL, 0);
	printf("%s\n", str);
	free(str);
	return (0);
}

static int	env_builtin(char *const envp[])
{
	int	i;

	i = 0;
	while (envp[i] != NULL)
	{
		printf("%s\n", envp[i]);
		i++;
	}
	return (0);
}

// Execute the specified builtin.
// The builtin must exist.
// Return the error value returned by the builtin.
// TODO all the builtins
int	exec_builtin(t_call call, t_env *env)
{
	if (ft_strncmp(call.program, "cd", 3) == 0)
		return (cd_builtin(call.argv[1]));
	if (ft_strncmp(call.program, "exit", 5) == 0)
		env->exit = true;
/*	if (ft_strncmp(call.program, "export", 7) == 0)
		return (export_builtin(call.argv));
	if (ft_strncmp(call.program, "unset", 6) == 0)
		return (unset_builtin());*/
	if (ft_strncmp(call.program, "pwd", 4) == 0)
		return (pwd_builtin());
	if (ft_strncmp(call.program, "env", 4) == 0)
		return (env_builtin(env->envp));
	return (1);
}