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Return Result from component_to_str

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This commit is contained in:
Raphael Nestler 2016-10-19 23:31:12 +02:00
parent 841c82b950
commit 42b0dd6083
1 changed files with 29 additions and 25 deletions
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34
libimagdiary/src/diaryid.rs
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@ -184,11 +184,12 @@ pub trait FromStoreId : Sized {
use std::path::Component;
fn component_to_str<'a>(com: Component<'a>) -> Option<&'a str> {
fn component_to_str<'a>(com: Component<'a>) -> Result<&'a str, DE> {
match com {
Component::Normal(s) => Some(s),
_ => None
_ => None,
}.and_then(|s| s.to_str())
.ok_or(DE::new(DEK::ParseError, None))
}
impl FromStoreId for DiaryId {
@ -197,7 +198,9 @@ impl FromStoreId for DiaryId {
use std::str::FromStr;
let mut cmps = s.components().rev();
let (hour, minute) = match cmps.next().and_then(component_to_str)
let (hour, minute) = try!(cmps.next()
.ok_or(DE::new(DEK::ParseError, None))
.and_then(component_to_str)
.and_then(|time| {
let mut time = time.split(":");
let hour = time.next().and_then(|s| FromStr::from_str(s).ok());
@ -209,31 +212,32 @@ impl FromStoreId for DiaryId {
debug!("Minute = {:?}", minute);
match (hour, minute) {
(Some(h), Some(m)) => Some((h, m)),
_ => None,
(Some(h), Some(m)) => Ok((h, m)),
_ => return Err(DE::new(DEK::ParseError, None)),
}
})
{
Some(s) => s,
None => return Err(DE::new(DEK::ParseError, None)),
};
}));
let day: Result<u32,_> = cmps.next().and_then(component_to_str)
let day: Result<u32,_> = cmps.next()
.ok_or(DE::new(DEK::ParseError, None))
.and_then(component_to_str)
.and_then(|s| s.parse::<u32>()
.map_err(|e| DE::new(DEK::ParseError, Some(Box::new(e)))));
let month: Result<u32,_> = cmps.next().and_then(component_to_str)
let month: Result<u32,_> = cmps.next()
.ok_or(DE::new(DEK::ParseError, None))
.and_then(component_to_str)
.and_then(|s| s.parse::<u32>()
.map_err(|e| DE::new(DEK::ParseError, Some(Box::new(e)))));
let year: Result<i32,_> = cmps.next().and_then(component_to_str)
let year: Result<i32,_> = cmps.next()
.ok_or(DE::new(DEK::ParseError, None))
.and_then(component_to_str)
.and_then(|s| s.parse::<i32>()
.map_err(|e| DE::new(DEK::ParseError, Some(Box::new(e)))));
let name = cmps.next().and_then(component_to_str).map(String::from);
let name = cmps.next()
.ok_or(DE::new(DEK::ParseError, None))
.and_then(component_to_str).map(String::from);
debug!("Day = {:?}", day);
debug!("Month = {:?}", month);
@ -243,7 +247,7 @@ impl FromStoreId for DiaryId {
let day = try!(day);
let month = try!(month);
let year = try!(year);
let name = try!(name.ok_or(DE::new(DEK::ParseError, None)));
let name = try!(name);
Ok(DiaryId::new(name, year, month, day, hour, minute))
}