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//
// imag - the personal information management suite for the commandline
// Copyright (C) 2015-2018 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 libimagstore::store::Entry;
use toml_query::read::TomlValueReadExt;
use builtin::header::field_path::FieldPath;
use filters::filter::Filter;
use toml::Value;
pub struct FieldIsEmpty {
header_field_path: FieldPath,
}
impl FieldIsEmpty {
pub fn new(path: FieldPath) -> FieldIsEmpty {
FieldIsEmpty {
header_field_path: path,
}
}
}
impl Filter<Entry> for FieldIsEmpty {
fn filter(&self, e: &Entry) -> bool {
e.get_header()
.read(&self.header_field_path[..])
.map(|v| {
match v {
Some(&Value::Array(ref a)) => a.is_empty(),
Some(&Value::String(ref s)) => s.is_empty(),
Some(&Value::Table(ref t)) => t.is_empty(),
Some(&Value::Boolean(_)) |
Some(&Value::Float(_)) |
Some(&Value::Integer(_)) => false,
_ => true,
}
})
.unwrap_or(false)
}
}
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