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mod subscription;
pub use subscription::{
Subscriptions,
Subscription
};
use std::hash::{Hash, Hasher};
use serde::{Deserialize, Serialize};
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Serialize, Deserialize)]
pub struct Topic(u32);
impl From<u32> for Topic {
fn from(value: u32) -> Topic {
Topic(value)
}
}
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Serialize, Deserialize)]
pub enum InterestLevel {
Low,
Normal,
High,
}
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub struct ProximityScore(usize);
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub struct PriorityScore(usize);
#[derive(Copy, Clone, Debug)]
pub struct Proximity {
priority: PriorityScore,
proximity: ProximityScore,
}
impl InterestLevel {
#[inline]
fn priority_score(self, other: Self) -> usize {
use InterestLevel::*;
match (self, other) {
(Low, Low) => 1,
(Low, Normal) => 2,
(Normal, Low) => 2,
(Low, High) => 3,
(High, Low) => 3,
(Normal, Normal) => 5,
(Normal, High) => 6,
(High, Normal) => 6,
(High, High) => 10,
}
}
}
impl PartialEq<Self> for Proximity {
fn eq(&self, other: &Self) -> bool {
self.cmp(other) == std::cmp::Ordering::Equal
}
}
impl Eq for Proximity {}
impl PartialOrd<Self> for Proximity {
fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
Some(self.cmp(other))
}
}
impl Ord for Proximity {
fn cmp(&self, other: &Self) -> std::cmp::Ordering {
use std::cmp::Ordering::{Equal, Greater, Less};
if self.priority > other.priority {
Greater
} else if self.priority < other.priority {
Less
} else if self.proximity > other.proximity {
Greater
} else if self.proximity < other.proximity {
Less
} else {
Equal
}
}
}
impl Hash for Proximity {
fn hash<H: Hasher>(&self, state: &mut H) {
self.priority.hash(state);
self.proximity.hash(state);
}
}
#[cfg(test)]
mod test {
use super::*;
use quickcheck::{Arbitrary, Gen};
impl Arbitrary for Topic {
fn arbitrary<G: Gen>(g: &mut G) -> Self {
Topic::from(u32::arbitrary(g))
}
}
impl Arbitrary for InterestLevel {
fn arbitrary<G: Gen>(g: &mut G) -> Self {
match u8::arbitrary(g) % 3 {
0 => InterestLevel::Low,
1 => InterestLevel::Normal,
_ => InterestLevel::High,
}
}
}
impl Arbitrary for Subscription {
fn arbitrary<G: Gen>(g: &mut G) -> Self {
Subscription {
topic: Topic::arbitrary(g),
interest_level: InterestLevel::arbitrary(g),
}
}
}
impl Arbitrary for Subscriptions {
fn arbitrary<G: Gen>(g: &mut G) -> Self {
let subscriptions: Vec<Subscription> = Arbitrary::arbitrary(g);
let mut subs = Subscriptions::default();
for subscription in subscriptions {
subs.add(subscription);
}
subs
}
}
}