bbdown_core/
selection.rs

1use crate::{Error, Result};
2use std::str::FromStr;
3
4#[derive(Clone, Debug, Eq, PartialEq)]
5pub enum Selection {
6    Current,
7    Latest,
8    All,
9    Episode(u64),
10    Page(u32),
11}
12
13impl FromStr for Selection {
14    type Err = Error;
15
16    fn from_str(raw: &str) -> Result<Self> {
17        let text = raw.trim();
18        let lower = text.to_ascii_lowercase();
19        match lower.as_str() {
20            "current" => Ok(Self::Current),
21            "latest" | "last" | "new" => Ok(Self::Latest),
22            "all" => Ok(Self::All),
23            _ => {
24                if let Some(id) = lower.strip_prefix("episode:") {
25                    return parse_u64(id, "episode").map(Self::Episode);
26                }
27                if let Some(page) = lower.strip_prefix("page:") {
28                    return parse_u32(page, "page").map(Self::Page);
29                }
30                Err(Error::InvalidInput(format!("invalid selection `{raw}`")))
31            }
32        }
33    }
34}
35
36fn parse_u64(text: &str, label: &str) -> Result<u64> {
37    text.parse::<u64>()
38        .map_err(|_| Error::InvalidInput(format!("invalid {label} selection `{text}`")))
39}
40
41fn parse_u32(text: &str, label: &str) -> Result<u32> {
42    text.parse::<u32>()
43        .map_err(|_| Error::InvalidInput(format!("invalid {label} selection `{text}`")))
44}
bbdown_core/selection.rs

bbdown_core/
selection.rs
