41 lines
1.5 KiB
Rust
41 lines
1.5 KiB
Rust
//
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// imag - the personal information management suite for the commandline
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// Copyright (C) 2015, 2016 Matthias Beyer <mail@beyermatthias.de> and contributors
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; version
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// 2.1 of the License.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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//
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pub type Tag = String;
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pub type TagSlice<'a> = &'a str;
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/// validator which can be used by clap to validate that a string is a valid tag
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pub fn is_tag(s: String) -> Result<(), String> {
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is_tag_str(&s)
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}
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pub fn is_tag_str(s: &String) -> Result<(), String> {
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use filters::filter::Filter;
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let is_lower = |s: &String| s.chars().all(|c| c.is_lowercase());
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let no_whitespace = |s: &String| s.chars().all(|c| !c.is_whitespace());
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let is_alphanum = |s: &String| s.chars().all(|c| c.is_alphanumeric());
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if is_lower.and(no_whitespace).and(is_alphanum).filter(s) {
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Ok(())
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} else {
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Err(format!("The string '{}' is not a valid tag", s))
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}
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}
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