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Prelude: args: use anyhow as Error/Result

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Natsu Kagami 2020-09-02 17:50:42 -04:00
parent 82a3b5a548
commit fe5cd8a58a
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1 changed files with 10 additions and 7 deletions
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17
youmubot-prelude/src/args.rs
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@ -2,14 +2,17 @@ pub use duration::Duration;
pub use username_arg::UsernameArg;
mod duration {
use crate::{Error, Result};
use std::fmt;
use std::time::Duration as StdDuration;
use String as Error;
// Parse a single duration unit
fn parse_duration_string(s: &str) -> Result<StdDuration, Error> {
const INVALID_DURATION: &str = "Not a valid duration";
/// Parse a single duration unit
fn parse_duration_string(s: &str) -> Result<StdDuration> {
// We reject the empty case
if s == "" {
return Err(Error::from("empty strings are not valid durations"));
return Err(Error::msg("empty strings are not valid durations"));
}
struct ParseStep {
current_value: Option<u64>,
@ -26,7 +29,7 @@ mod duration {
current_value: Some(v.unwrap_or(0) * 10 + ((item as u64) - ('0' as u64))),
..s
}),
(_, None) => Err(Error::from("Not a valid duration")),
(_, None) => Err(Error::msg(INVALID_DURATION)),
(item, Some(v)) => Ok(ParseStep {
current_value: None,
current_duration: s.current_duration
@ -36,7 +39,7 @@ mod duration {
'h' => StdDuration::from_secs(60 * 60),
'd' => StdDuration::from_secs(60 * 60 * 24),
'w' => StdDuration::from_secs(60 * 60 * 24 * 7),
_ => return Err(Error::from("Not a valid duration")),
_ => return Err(Error::msg(INVALID_DURATION)),
} * (v as u32),
}),
},
@ -44,7 +47,7 @@ mod duration {
.and_then(|v| match v.current_value {
// All values should be consumed
None => Ok(v),
_ => Err(Error::from("Not a valid duration")),
_ => Err(Error::msg(INVALID_DURATION)),
})
.map(|v| v.current_duration)
}