51 lines
1.2 KiB
Rust
51 lines
1.2 KiB
Rust
use std::cmp::Ordering;
|
|
|
|
use ruma::api::client::error::ErrorKind;
|
|
|
|
use crate::{Error, Result};
|
|
|
|
#[derive(Hash, PartialEq, Eq, Clone, Copy, Debug)]
|
|
pub enum PduCount {
|
|
Backfilled(u64),
|
|
Normal(u64),
|
|
}
|
|
|
|
impl PduCount {
|
|
#[must_use]
|
|
pub fn min() -> Self { Self::Backfilled(u64::MAX) }
|
|
|
|
#[must_use]
|
|
pub fn max() -> Self { Self::Normal(u64::MAX) }
|
|
|
|
pub fn try_from_string(token: &str) -> Result<Self> {
|
|
if let Some(stripped_token) = token.strip_prefix('-') {
|
|
stripped_token.parse().map(PduCount::Backfilled)
|
|
} else {
|
|
token.parse().map(PduCount::Normal)
|
|
}
|
|
.map_err(|_| Error::BadRequest(ErrorKind::InvalidParam, "Invalid pagination token."))
|
|
}
|
|
|
|
#[must_use]
|
|
pub fn stringify(&self) -> String {
|
|
match self {
|
|
Self::Backfilled(x) => format!("-{x}"),
|
|
Self::Normal(x) => x.to_string(),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl PartialOrd for PduCount {
|
|
fn partial_cmp(&self, other: &Self) -> Option<Ordering> { Some(self.cmp(other)) }
|
|
}
|
|
|
|
impl Ord for PduCount {
|
|
fn cmp(&self, other: &Self) -> Ordering {
|
|
match (self, other) {
|
|
(Self::Normal(s), Self::Normal(o)) => s.cmp(o),
|
|
(Self::Backfilled(s), Self::Backfilled(o)) => o.cmp(s),
|
|
(Self::Normal(_), Self::Backfilled(_)) => Ordering::Greater,
|
|
(Self::Backfilled(_), Self::Normal(_)) => Ordering::Less,
|
|
}
|
|
}
|
|
}
|