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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 libimagstore::store::Entry; use toml_query::read::TomlValueReadExt; use filters::failable::filter::FailableFilter; use failure::Fallible as Result; use failure::Error; use builtin::header::field_path::FieldPath; pub struct FieldExists { header_field_path: FieldPath, } impl FieldExists { pub fn new(path: FieldPath) -> FieldExists { FieldExists { header_field_path: path, } } } impl FailableFilter<Entry> for FieldExists { type Error = Error; fn filter(&self, e: &Entry) -> Result<bool> { e.get_header() .read(&self.header_field_path[..]) .map_err(Error::from) .map(|o| o.is_some()) } }