// Copyright 2018 Yuya Nishihara <yuya@tcha.org>

//

// This software may be used and distributed according to the terms of the

// GNU General Public License version 2 or any later version.

//! cHg extensions to command server client.

use std::ffi::OsStr;

use std::os::unix::io::AsRawFd;

use tokio_hglib::{Client, Connection};

use super::attachio::AttachIo;

use super::message;

use super::runcommand::ChgRunCommand;

use super::uihandler::SystemHandler;

pub trait ChgClientExt<C>

    where C: Connection + AsRawFd,

{

    /// Attaches the client file descriptors to the server.

    fn attach_io<I, O, E>(self, stdin: I, stdout: O, stderr: E) -> AttachIo<C, I, O, E>

        where I: AsRawFd,

              O: AsRawFd,

              E: AsRawFd;

    /// Runs the specified Mercurial command with cHg extension.

    fn run_command_chg<I, P, H>(self, handler: H, args: I) -> ChgRunCommand<C, H>

        where I: IntoIterator<Item = P>,

              P: AsRef<OsStr>,

              H: SystemHandler;

}

impl<C> ChgClientExt<C> for Client<C>

    where C: Connection + AsRawFd,

{

    fn attach_io<I, O, E>(self, stdin: I, stdout: O, stderr: E) -> AttachIo<C, I, O, E>

        where I: AsRawFd,

              O: AsRawFd,

              E: AsRawFd,

    {

        AttachIo::with_client(self, stdin, stdout, Some(stderr))

    }

    fn run_command_chg<I, P, H>(self, handler: H, args: I) -> ChgRunCommand<C, H>

        where I: IntoIterator<Item = P>,

              P: AsRef<OsStr>,

              H: SystemHandler,

    {

        ChgRunCommand::with_client(self, handler, message::pack_args_os(args))

    }

}