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/*-
 * cdns-rs - a simple sync/async DNS query library
 * Copyright (C) 2020  Aleksandr Morozov
 * 
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 *  file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */


use std::path::Path;

use crate::cfg_host_parser::HostConfig;
use crate::error::*;


use super::caches::CacheOperations;
use super::cfg_parsers::{ConfigParser, read_file};
use super::common::{ HOST_CFG_PATH, HOST_CFG_PATH_P};
use super::log::sync_log_writer;

/// An /etc/hosts file parser


impl CacheOperations for HostConfig
{
    fn is_reload_allowed(&self) -> bool 
    {
        return true;
    }
}

impl ConfigParser<HostConfig> for HostConfig
{
    fn parse_config() -> CDnsResult<Self>
    {
        let mut writer = Writer::new();

        let file_content = read_file(HOST_CFG_PATH)?;
        
        let ret = Self::parse_host_file_internal(file_content, &mut writer);

        sync_log_writer(writer);

        return ret;
    }

    fn get_file_path() -> &'static Path
    {
        return &HOST_CFG_PATH_P;
    }

    fn is_default(&self) -> bool
    {
        return self.is_empty();
    }
}