use std::{
fmt::Debug,
ops::{Add, AddAssign, Div},
};
use allocative::Allocative;
use serde::{Deserialize, Serialize};
use vecdb::{CheckedSub, PrintableIndex, StoredCompressed};
use zerocopy_derive::{FromBytes, Immutable, IntoBytes, KnownLayout};
use super::MonthIndex;
#[derive(
Debug,
Clone,
Copy,
PartialEq,
Eq,
PartialOrd,
Ord,
Default,
Serialize,
Deserialize,
FromBytes,
Immutable,
IntoBytes,
KnownLayout,
StoredCompressed,
Allocative,
)]
pub struct SemesterIndex(u16);
impl From<u16> for SemesterIndex {
fn from(value: u16) -> Self {
Self(value)
}
}
impl From<usize> for SemesterIndex {
fn from(value: usize) -> Self {
Self(value as u16)
}
}
impl From<SemesterIndex> for u16 {
fn from(value: SemesterIndex) -> Self {
value.0
}
}
impl From<SemesterIndex> for usize {
fn from(value: SemesterIndex) -> Self {
value.0 as usize
}
}
impl Add<usize> for SemesterIndex {
type Output = Self;
fn add(self, rhs: usize) -> Self::Output {
Self::from(self.0 + rhs as u16)
}
}
impl Add<SemesterIndex> for SemesterIndex {
type Output = Self;
fn add(self, rhs: Self) -> Self::Output {
Self::from(self.0 + rhs.0)
}
}
impl AddAssign for SemesterIndex {
fn add_assign(&mut self, rhs: Self) {
*self = Self(self.0 + rhs.0)
}
}
impl Div<usize> for SemesterIndex {
type Output = Self;
fn div(self, _: usize) -> Self::Output {
unreachable!()
}
}
impl From<MonthIndex> for SemesterIndex {
fn from(value: MonthIndex) -> Self {
Self((usize::from(value) / 6) as u16)
}
}
impl CheckedSub for SemesterIndex {
fn checked_sub(self, rhs: Self) -> Option<Self> {
self.0.checked_sub(rhs.0).map(Self)
}
}
impl PrintableIndex for SemesterIndex {
fn to_string() -> &'static str {
"semesterindex"
}
fn to_possible_strings() -> &'static [&'static str] {
&["s", "semester", "semesterindex"]
}
}
impl std::fmt::Display for SemesterIndex {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
let mut buf = itoa::Buffer::new();
let str = buf.format(self.0);
f.write_str(str)
}
}