pm_types/
currency.rs

1use std::str::FromStr;
2
3#[derive(Debug, Clone)]
4pub struct Currency(pub String);
5
6impl Currency {
7    pub fn new(currency: &str) -> anyhow::Result<Self> {
8        if !currency.chars().all(|c| c.is_ascii_alphabetic()) {
9            anyhow::bail!("Currency must contain only letters");
10        }
11        Ok(Self(currency.to_ascii_uppercase()))
12    }
13
14    pub fn encode(&self) -> Option<u32> {
15        let mut result: u32 = 0;
16
17        for (i, c) in self.0.chars().enumerate() {
18            let value = match c {
19                'A'..='Z' => (c as u32) - ('A' as u32),
20                _ => return None,
21            };
22            result |= value << (i * 5);
23        }
24
25        Some(result)
26    }
27}
28
29impl FromStr for Currency {
30    type Err = anyhow::Error;
31
32    fn from_str(s: &str) -> Result<Self, Self::Err> {
33        Currency::new(s)
34    }
35}
pm_types/currency.rs

pm_types/
currency.rs
