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use crate::{
err::Error,
file::{as_json, from_json, Build, Load, Save},
};
use serde::{Deserialize, Serialize};
use std::{collections::BTreeMap, fmt::Display, path::Path};
type Map<T, S> = BTreeMap<T, S>;
#[derive(Debug, Deserialize, Serialize)]
pub struct Set<T: Ord, S>(Map<T, S>);
impl<T: Display + Ord + PartialEq, S> Set<T, S> {
#[inline]
#[must_use]
pub fn new(map: Map<T, S>) -> Self {
debug_assert!(!map.is_empty());
Self(map)
}
#[inline]
#[must_use]
pub fn from_vec(list: Vec<(T, S)>) -> Self {
let mut map = Map::new();
for (key, item) in list {
if map.contains_key(&key) {
panic!("Duplicate entries for group: {}", key);
}
map.insert(key, item);
}
Self::new(map)
}
#[inline]
#[must_use]
pub fn map(&self) -> &Map<T, S> {
&self.0
}
#[inline]
#[must_use]
pub fn mut_map(&mut self) -> &mut Map<T, S> {
&mut self.0
}
#[inline]
#[must_use]
pub fn index_of(&self, k: &T) -> Option<usize> {
for (index, key) in self.0.keys().enumerate() {
if k == key {
return Some(index);
}
}
None
}
}
impl<T, S> Load for Set<T, S>
where
for<'de> T: Deserialize<'de> + Ord,
for<'de> S: Deserialize<'de>,
{
#[inline]
fn load(path: &Path) -> Result<Self, Error> {
println!("loading: {}", path.display());
from_json(path)
}
}
impl<T: Ord + Serialize, S: Serialize> Save for Set<T, S> {
#[inline]
fn save(&self, path: &Path) -> Result<(), Error> {
as_json(self, path)
}
}
#[allow(clippy::use_self)]
impl<T: Display + Ord, S: Build> Build for Set<T, S> {
type Inst = Set<T, S::Inst>;
#[inline]
fn build(self, in_dir: &Path) -> Result<Self::Inst, Error> {
let mut map = Map::new();
for (key, item) in self.0 {
if map.contains_key(&key) {
panic!("Duplicate entries for key: {}", key);
}
map.insert(key, item.build(in_dir)?);
}
Ok(Self::Inst::new(map))
}
}