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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 regex::Regex;
use toml::Value;
use libimagstore::store::Entry;
use builtin::header::field_path::FieldPath;
use builtin::header::field_predicate::FieldPredicate;
use builtin::header::field_predicate::Predicate;
use filters::failable::filter::FailableFilter;
use failure::Fallible as Result;
use failure::Error;
struct EqGrep{
regex: Regex
}
impl Predicate for EqGrep {
fn evaluate(&self, v: &Value) -> bool {
match *v {
Value::String(ref s) => self.regex.captures(&s[..]).is_some(),
_ => false,
}
}
}
/// Check whether certain header field in a entry is equal to a value
pub struct FieldGrep {
filter: FieldPredicate<EqGrep>,
}
impl FieldGrep {
pub fn new(path: FieldPath, grep: Regex) -> FieldGrep {
FieldGrep {
filter: FieldPredicate::new(path, Box::new(EqGrep { regex: grep})),
}
}
}
impl FailableFilter<Entry> for FieldGrep {
type Error = Error;
fn filter(&self, e: &Entry) -> Result<bool> {
self.filter.filter(e)
}
}
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