libimagentryfilter/builtin/header/
field_isempty.rs

1//
2// imag - the personal information management suite for the commandline
3// Copyright (C) 2015-2020 Matthias Beyer <mail@beyermatthias.de> and contributors
4//
5// This library is free software; you can redistribute it and/or
6// modify it under the terms of the GNU Lesser General Public
7// License as published by the Free Software Foundation; version
8// 2.1 of the License.
9//
10// This library is distributed in the hope that it will be useful,
11// but WITHOUT ANY WARRANTY; without even the implied warranty of
12// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13// Lesser General Public License for more details.
14//
15// You should have received a copy of the GNU Lesser General Public
16// License along with this library; if not, write to the Free Software
17// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
18//
19
20use libimagstore::store::Entry;
21use toml_query::read::TomlValueReadExt;
22
23use crate::builtin::header::field_path::FieldPath;
24use filters::failable::filter::FailableFilter;
25
26use failure::Fallible as Result;
27use failure::Error;
28
29use toml::Value;
30
31pub struct FieldIsEmpty {
32    header_field_path: FieldPath,
33}
34
35impl FieldIsEmpty {
36
37    pub fn new(path: FieldPath) -> FieldIsEmpty {
38        FieldIsEmpty {
39            header_field_path: path,
40        }
41    }
42
43}
44
45impl FailableFilter<Entry> for FieldIsEmpty {
46    type Error = Error;
47
48    fn filter(&self, e: &Entry) -> Result<bool> {
49        Ok(e
50             .get_header()
51             .read(&self.header_field_path[..])?
52             .map(|v| {
53                 match v {
54                     Value::Array(ref a)   => a.is_empty(),
55                     Value::String(ref s)  => s.is_empty(),
56                     Value::Table(ref t)   => t.is_empty(),
57                     Value::Boolean(_)  |
58                     Value::Float(_)    |
59                     Value::Datetime(_) |
60                     Value::Integer(_)  => false,
61                 }
62             })
63             .unwrap_or(true))
64    }
65
66}
67
68
69
libimagentryfilter/builtin/header/field_isempty.rs

libimagentryfilter/builtin/header/
field_isempty.rs
