/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   parser.c                                           :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: narnaud <narnaud@student.42.fr>            +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/01/06 07:52:29 by narnaud           #+#    #+#             */
/*   Updated: 2022/04/14 09:19:12 by narnaud          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "minishell.h"


size_t	count_arguments(t_token tok)
{
	size_t	ret;

	ret = 0;
	while (tok.value)
	{
		if (tok.type == 0 && tok.value[0] != '|')
			ret++;
		if (tok.next)
			tok = *(tok.next);
		else
			break ;
	}
	return (ret);
}

void	update_redir(t_command *cmd, t_token tok)
{
		if (tok.type == OUT)
		{
			if (cmd->fd[1])
				close(cmd->fd[1]);
			cmd->output = init_file(tok.value, O_TRUNC | O_WRONLY);
		}
		else if (tok.type == ADD)
		{	
			if (cmd->fd[1])
				close(cmd->fd[1]);
			cmd->fd[1] = init_file(tok.value, O_APPEND | O_WRONLY);
		}
		else if (tok.type == IN)
		{	
			if (cmd->fd[0])
				close(cmd->fd[0]);
			cmd->fd[0] = init_file(tok.value, O_RDONLY);
		}
		else if (tok.type == HD)
		{
			if (cmd->fd[0])
				close(cmd->fd[0]);
			cmd->fd[0] = 0;
			cmd->heredoc = tok.value;
		}
}

t_command	*parser(t_token	tok)
{
	int 		i;
	t_command	*cmd;
	t_command	*ret;

	cmd = ft_calloc(1, sizeof(t_command));
	ret = cmd;
	while (tok.value)
	{
		i = 0;
		cmd->argv = ft_calloc(count_arguments(tok) + 1, sizeof(char *));
		while(tok.value[0] != '|')
		{
			if (tok.type)
				update_redir(cmd, tok);
			else
			{
				cmd->argv[i] = tok.value;
				i++;
			}
			if (tok.next)
				tok = *(tok.next);
			else
				break ;
		}
		//printf("Input : %d\n", cmd->input);
		//printf("Output : %d\n", cmd->output);
		cmd->argv[i] = NULL;
		if (tok.next)
			tok = *(tok.next);
		else
			break ;
		cmd->next = ft_calloc(1, sizeof(t_command));
		cmd->next->prev = cmd;
		cmd = cmd->next;
	}
	return (ret);
}