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//
// imag - the personal information management suite for the commandline
// Copyright (C) 2015-2019 Matthias Beyer <mail@beyermatthias.de> and contributors
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; version
// 2.1 of the License.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//

use failure::ResultExt;
use failure::Error;
use failure::err_msg;
use failure::Fallible as Result;

use libimagstore::store::Entry;
use libimagerror::errors::ErrorMsg as EM;

use uuid::Uuid;
use toml_query::read::TomlValueReadTypeExt;

pub trait Task {
    fn get_uuid(&self) -> Result<Uuid>;
}

impl Task for Entry {
    fn get_uuid(&self) -> Result<Uuid> {
        self.get_header()
            .read_string("todo.uuid")?
            .ok_or_else(|| Error::from(EM::EntryHeaderFieldMissing("todo.uuid")))
            .and_then(|u| {
                Uuid::parse_str(&u).context(err_msg("UUID Parser error")).map_err(Error::from)
            })
    }
}