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//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
//
//! Module containing TaskPriority types and trait impls
use serde::Serialize;
use serde::ser::Serializer;
use serde::de::Deserialize;
use serde::de::Deserializer;
use serde::de::Error as DeError;
use serde::de::Visitor;
use std::fmt::Formatter;
use std::fmt::Result as FmtResult;
/// Enum for the priorities taskwarrior supports.
#[derive(Debug, Clone, PartialEq)]
pub enum TaskPriority {
/// Low prio for a Task
Low,
/// Medium prio for a Task
Medium,
/// High prio for a Task
High,
}
impl Serialize for TaskPriority {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where S: Serializer
{
serializer.serialize_str(
match self {
&TaskPriority::Low => "L",
&TaskPriority::Medium => "M",
&TaskPriority::High => "H",
}
)
}
}
impl Deserialize for TaskPriority {
fn deserialize<D>(deserializer: D) -> Result<TaskPriority, D::Error>
where D: Deserializer
{
struct TaskPriorityVisitor;
impl Visitor for TaskPriorityVisitor {
type Value = TaskPriority;
fn expecting(&self, fmt: &mut Formatter) -> FmtResult {
write!(fmt, "one of 'L', 'M', 'H'")
}
fn visit_str<E>(self, value: &str) -> Result<TaskPriority, E>
where E: DeError
{
match value {
"L" => Ok(TaskPriority::Low),
"M" => Ok(TaskPriority::Medium),
"H" => Ok(TaskPriority::High),
_ => Err(DeError::custom("expected one of 'L', 'M', 'H'")),
}
}
}
deserializer.deserialize(TaskPriorityVisitor)
}
}
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