matchmaker/utils/
percentage.rs

1use std::fmt;
2
3use cli_boilerplate_automation::impl_restricted_wrapper;
4use serde::{Deserialize, Deserializer};
5
6impl_restricted_wrapper!(Percentage, u16, 100);
7impl Percentage {
8    pub fn new(value: u16) -> Self {
9        if value <= 100 {
10            Self(value)
11        } else {
12            Self(100)
13        }
14    }
15    
16    pub fn compute_with_clamp(&self, total: u16, max: u16) -> u16 {
17        let pct_height = (total * self.inner()).div_ceil(100);
18        let max_height = if max == 0 { total } else { max };
19        pct_height.min(max_height)
20    }
21}
22
23impl fmt::Display for Percentage {
24    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
25        write!(f, "{}%", self.0)
26    }
27}
28
29
30impl TryFrom<u16> for Percentage {
31    type Error = String;
32
33    fn try_from(value: u16) -> Result<Self, Self::Error> {
34        if value > 100 {
35            Err(format!("Percentage out of range: {}", value))
36        } else {
37            Ok(Self::new(value))
38        }
39    }
40}
41impl<'de> Deserialize<'de> for Percentage {
42    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
43    where
44    D: Deserializer<'de>,
45    {
46        let v = u16::deserialize(deserializer)?;
47        v.try_into().map_err(serde::de::Error::custom)
48    }
49}
50impl std::str::FromStr for Percentage {
51    type Err = String;
52    
53    fn from_str(s: &str) -> Result<Self, Self::Err> {
54        let s = s.trim_end_matches('%'); // allow optional trailing '%'
55        let v: u16 = s
56        .parse()
57        .map_err(|e: std::num::ParseIntError| format!("Invalid number: {}", e))?;
58        v.try_into()
59    }
60}
matchmaker/utils/percentage.rs

matchmaker/utils/
percentage.rs
