//
// 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 toml::to_string as toml_to_string;
use toml::from_str as toml_from_str;
use toml_query::read::TomlValueReadExt;
use failure::Fallible as Result;
use failure::Error;

use libimagstore::store::Entry;
use libimagentryutil::isa::Is;
use libimagentryutil::isa::IsKindHeaderPathProvider;
use libimagerror::errors::ErrorMsg as EM;

use crate::deser::DeserVcard;

/// Trait to be implemented on ::libimagstore::store::Entry
pub trait Contact {

    fn is_contact(&self) -> Result<bool>;

    // getting data

    fn deser(&self) -> Result<DeserVcard>;

    // More convenience functionality may follow

}

provide_kindflag_path!(pub IsContact, "contact.is_contact");

impl Contact for Entry {

    fn is_contact(&self) -> Result<bool> {
        self.is::<IsContact>()
    }

    fn deser(&self) -> Result<DeserVcard> {
        trace!("Reading header of {:?}", self.get_location());
        let data = self
            .get_header()
            .read("contact.data")?
            .ok_or_else(|| Error::from(EM::EntryHeaderFieldMissing("contact.data")))?;

        // ugly hack
        let data_str            = toml_to_string(&data)?;
        let deser : DeserVcard  = toml_from_str(&data_str)?;

        Ok(deser)
    }

}