//
// imag - the personal information management suite for the commandline
// Copyright (C) 2015, 2016 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 semver::Version;
use toml::Value;

use libimagstore::store::Entry;

use toml_query::read::TomlValueReadExt;
use filters::filter::Filter;

pub struct VersionEq {
    version: Version,
}

impl VersionEq {

    pub fn new(version: Version) -> VersionEq {
        VersionEq { version: version }
    }

}

impl Filter<Entry> for VersionEq {

    fn filter(&self, e: &Entry) -> bool {
        e.get_header()
            .read("imag.version")
            .map(|val| {
                val.map_or(false, |v| {
                    match *v {
                        Value::String(ref s) => {
                            match Version::parse(&s[..]) {
                                Ok(v) => v == self.version,
                                _ => false
                            }
                        },
                        _ => false,
                    }
                })
            })
            .unwrap_or(false)
    }

}