imag/lib/domain/libimaghabit/src/util.rs
Matthias Beyer d5a9e4930d Update dates in license header
And add missing header in one file
2018-02-07 02:48:53 +01:00

91 lines
2.7 KiB
Rust

//
// 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 std::ops::BitXor;
use error::Result;
use habit::HabitTemplate;
use instance::HabitInstance;
use libimagstore::storeid::StoreId;
use libimagstore::store::Entry;
/// Helper trait to check whether a object which can be a habit instance and a habit template is
/// actually a valid object, whereas "valid" is defined that it is _either_ an instance or a
/// template (think XOR).
pub trait IsValidHabitObj : HabitInstance + HabitTemplate {
fn is_valid_havit_obj(&self) -> Result<bool> {
self.is_habit_instance().and_then(|b| self.is_habit_template().map(|a| a.bitxor(b)))
}
}
impl<H> IsValidHabitObj for H
where H: HabitInstance + HabitTemplate
{
// Empty
}
pub trait IsHabitCheck {
fn is_habit(&self) -> bool;
fn is_habit_instance(&self) -> bool;
fn is_habit_template(&self) -> bool;
}
impl IsHabitCheck for StoreId {
fn is_habit(&self) -> bool {
self.is_in_collection(&["habit"])
}
fn is_habit_instance(&self) -> bool {
self.is_in_collection(&["habit", "instance"])
}
fn is_habit_template(&self) -> bool {
self.is_in_collection(&["habit", "template"])
}
}
impl IsHabitCheck for Entry {
/// Helper function to check whether an entry is a habit (either instance or template)
fn is_habit(&self) -> bool {
self.get_location().is_habit()
}
/// Check whether an entry is a habit instance
fn is_habit_instance(&self) -> bool {
self.get_location().is_habit_instance()
}
/// Check whether an entry is a habit template
fn is_habit_template(&self) -> bool {
self.get_location().is_habit_template()
}
}
#[inline]
pub fn get_string_header_from_entry(e: &Entry, path: &'static str) -> Result<String> {
use error::HabitErrorKind as HEK;
use toml_query::read::TomlValueReadTypeExt;
e.get_header()
.read_string(path)?
.ok_or(HEK::HeaderFieldMissing(path).into())
}