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/*
 * File: null.rs
 * Project: operation
 * Created Date: 08/01/2023
 * Author: Shun Suzuki
 * -----
 * Last Modified: 09/01/2023
 * Modified By: Shun Suzuki (suzuki@hapis.k.u-tokyo.ac.jp)
 * -----
 * Copyright (c) 2023 Shun Suzuki. All rights reserved.
 *
 */

use anyhow::Result;

use super::Operation;
use crate::{CPUControlFlags, TxDatagram};

#[derive(Default)]
pub struct NullHeader {
    sent: bool,
}

impl Operation for NullHeader {
    fn pack(&mut self, tx: &mut TxDatagram) -> Result<()> {
        tx.header_mut().cpu_flag.remove(CPUControlFlags::MOD);
        tx.header_mut()
            .cpu_flag
            .remove(CPUControlFlags::CONFIG_SILENCER);
        tx.header_mut()
            .cpu_flag
            .remove(CPUControlFlags::CONFIG_SYNC);

        tx.header_mut().size = 0;

        self.sent = true;
        Ok(())
    }

    fn init(&mut self) {
        self.sent = false;
    }

    fn is_finished(&self) -> bool {
        self.sent
    }
}

#[derive(Default)]
pub struct NullBody {
    sent: bool,
}

impl Operation for NullBody {
    fn pack(&mut self, tx: &mut TxDatagram) -> Result<()> {
        tx.header_mut().cpu_flag.remove(CPUControlFlags::WRITE_BODY);
        tx.header_mut().cpu_flag.remove(CPUControlFlags::MOD_DELAY);
        tx.num_bodies = 0;

        self.sent = true;
        Ok(())
    }

    fn init(&mut self) {
        self.sent = false;
    }

    fn is_finished(&self) -> bool {
        self.sent
    }
}