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Add Linkable::is_linked_to()

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Signed-off-by: Matthias Beyer <mail@beyermatthias.de>
This commit is contained in:
Matthias Beyer 2019-10-05 21:45:00 +02:00
parent b2dffff6e8
commit 3be9407c6c
1 changed files with 33 additions and 2 deletions
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35
lib/entry/libimagentrylink/src/linkable.rs
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@ -62,6 +62,8 @@ pub trait Linkable {
/// Remove a directional link: self -> otehr /// Remove a directional link: self -> otehr
fn remove_link_to(&mut self, other: &mut Entry) -> Result<()>; fn remove_link_to(&mut self, other: &mut Entry) -> Result<()>;
/// Check whether an entry is linked to another entry
fn is_linked_to(&self, other: &Entry) -> Result<bool>;
} }
#[derive(Serialize, Deserialize, Debug)] #[derive(Serialize, Deserialize, Debug)]
@ -274,6 +276,35 @@ impl Linkable for Entry {
}) })
} }
/// Check whether an entry is linked to another entry
fn is_linked_to(&self, other: &Entry) -> Result<bool> {
let left_partial = get_link_partial(self)?
.ok_or_else(|| format_err!("Cannot read links from {}", self.get_location()))?;
let right_partial = get_link_partial(&other)?
.ok_or_else(|| format_err!("Cannot read links from {}", other.get_location()))?;
let left_id = self.get_location();
let right_id = other.get_location();
let strary_contains = |sary: &Vec<String>, id: &StoreId| -> Result<bool> {
sary.iter().map(|e| {
StoreId::new(PathBuf::from(e)).map(|e| e == *id)
}).fold(Ok(false), |a, e| a.and_then(|_| e))
};
let is_linked_from = |partial: &LinkPartial, id| {
partial.from.as_ref().map(|f| strary_contains(f, id)).unwrap_or(Ok(false))
};
let is_linked_to = |partial: &LinkPartial, id| {
partial.to.as_ref().map(|t| strary_contains(t, id)).unwrap_or(Ok(false))
};
Ok({
is_linked_from(&left_partial, &right_id)? && is_linked_from(&right_partial, &left_id)?
||
is_linked_to(&left_partial, &right_id)? && is_linked_to(&right_partial, &left_id)?
})
}
} }
fn link_string_iter_to_link_iter<I>(iter: I) -> Result<LinkIter> fn link_string_iter_to_link_iter<I>(iter: I) -> Result<LinkIter>
@ -294,8 +325,8 @@ fn alter_linking<F>(left: &mut Entry, right: &mut Entry, f: F) -> Result<()>
Ok(get_link_partial(e)?.unwrap_or_else(LinkPartial::default)) Ok(get_link_partial(e)?.unwrap_or_else(LinkPartial::default))
}; };
let left_partial : LinkPartial = get_partial(left)?; let left_partial : LinkPartial = get_partial(&left)?;
let right_partial : LinkPartial = get_partial(right)?; let right_partial : LinkPartial = get_partial(&right)?;
trace!("Partial left before: {:?}", left_partial); trace!("Partial left before: {:?}", left_partial);
trace!("Partial right before: {:?}", right_partial); trace!("Partial right before: {:?}", right_partial);