imag/lib/domain/libimaghabit/src/instance.rs
Matthias Beyer ede70581f3 libimaghabit: Move from error-chain to failure
Signed-off-by: Matthias Beyer <mail@beyermatthias.de>
2018-10-30 18:46:28 +01:00

87 lines
3.1 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 chrono::NaiveDate;
use toml::Value;
use toml_query::set::TomlValueSetExt;
use failure::Fallible as Result;
use util::*;
use libimagstore::store::Entry;
use libimagentryutil::isa::Is;
use libimagentryutil::isa::IsKindHeaderPathProvider;
/// An instance of a habit is created for each time a habit is done.
///
/// # Note
///
/// A habit is a daily thing, so we only provide "date" as granularity for its time data.
///
pub trait HabitInstance {
/// Check whether the instance is a habit instance by checking its headers for the habit
/// data
fn is_habit_instance(&self) -> Result<bool>;
fn get_date(&self) -> Result<NaiveDate>;
fn set_date(&mut self, n: &NaiveDate) -> Result<()>;
fn get_comment(&self) -> Result<String>;
fn set_comment(&mut self, c: String) -> Result<()>;
fn get_template_name(&self) -> Result<String>;
}
provide_kindflag_path!(pub IsHabitInstance, "habit.instance.is_habit_instance");
impl HabitInstance for Entry {
fn is_habit_instance(&self) -> Result<bool> {
self.is::<IsHabitInstance>().map_err(From::from)
}
fn get_date(&self) -> Result<NaiveDate> {
use libimagutil::date::date_from_string as dts;
let date_from_string = |d| dts(d).map_err(From::from);
get_string_header_from_entry(self, "habit.instance.date").and_then(date_from_string)
}
fn set_date(&mut self, n: &NaiveDate) -> Result<()> {
use libimagutil::date::date_to_string;
// Using `set` here because when creating the entry, these headers should be made present.
self.get_header_mut()
.set("habit.instance.date", Value::String(date_to_string(n)))
.map_err(From::from)
.map(|_| ())
}
fn get_comment(&self) -> Result<String> {
get_string_header_from_entry(self, "habit.instance.comment")
}
fn set_comment(&mut self, c: String) -> Result<()> {
// Using `set` here because when creating the entry, these headers should be made present.
self.get_header_mut()
.set("habit.instance.comment", Value::String(c))
.map_err(From::from)
.map(|_| ())
}
fn get_template_name(&self) -> Result<String> {
get_string_header_from_entry(self, "habit.instance.name")
}
}